/*
- * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2007 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
#include <mach_kdb.h>
#include <mach_ldebug.h>
+#include <libkern/OSAtomic.h>
+
#include <mach/machine/vm_types.h>
#include <mach/boolean.h>
#include <kern/thread.h>
#include <kern/zalloc.h>
+#include <kern/queue.h>
#include <kern/lock.h>
#include <kern/kalloc.h>
#include <i386/machine_cpu.h>
#include <i386/mp_slave_boot.h>
#include <i386/seg.h>
+#include <i386/serial_io.h>
#include <i386/cpu_capabilities.h>
+#include <i386/machine_routines.h>
+#include <i386/proc_reg.h>
+#include <i386/tsc.h>
#if MACH_KDB
#include <ddb/db_command.h>
#include <ddb/db_print.h>
#endif /* MACH_KDB */
-#include <kern/xpr.h>
-
#include <vm/vm_protos.h>
#include <i386/mp.h>
#include <sys/kdebug.h>
+/* #define DEBUGINTERRUPTS 1 uncomment to ensure pmap callers have interrupts enabled */
+#ifdef DEBUGINTERRUPTS
+#define pmap_intr_assert() {if (processor_avail_count > 1 && !ml_get_interrupts_enabled()) panic("pmap interrupt assert %s, %d",__FILE__, __LINE__);}
+#else
+#define pmap_intr_assert()
+#endif
+
#ifdef IWANTTODEBUG
#undef DEBUG
#define DEBUG 1
#include <i386/postcode.h>
#endif /* IWANTTODEBUG */
+//#define PMAP_TRACES 1
+#ifdef PMAP_TRACES
+boolean_t pmap_trace = FALSE;
+#define PMAP_TRACE(x,a,b,c,d,e) \
+ if (pmap_trace) { \
+ KERNEL_DEBUG_CONSTANT(x,a,b,c,d,e); \
+ }
+#else
+#define PMAP_TRACE(x,a,b,c,d,e) KERNEL_DEBUG(x,a,b,c,d,e)
+#endif /* PMAP_TRACES */
+
/*
* Forward declarations for internal functions.
*/
pmap_t map,
vm_map_offset_t v);
-void pmap_expand(
- pmap_t map,
- vm_map_offset_t v);
-
-static void pmap_remove_range(
+void pmap_remove_range(
pmap_t pmap,
vm_map_offset_t va,
pt_entry_t *spte,
pt_entry_t *epte);
void phys_attribute_clear(
- ppnum_t phys,
+ ppnum_t phys,
int bits);
-boolean_t phys_attribute_test(
- ppnum_t phys,
+int phys_attribute_test(
+ ppnum_t phys,
int bits);
void phys_attribute_set(
- ppnum_t phys,
+ ppnum_t phys,
int bits);
void pmap_set_reference(
boolean_t phys_page_exists(
ppnum_t pn);
+
#ifdef PMAP_DEBUG
void dump_pmap(pmap_t);
void dump_4GB_pdpt(pmap_t p);
#define iswired(pte) ((pte) & INTEL_PTE_WIRED)
int nx_enabled = 1; /* enable no-execute protection */
+int allow_data_exec = VM_ABI_32; /* 32-bit apps may execute data by default, 64-bit apps may not */
+int allow_stack_exec = 0; /* No apps may execute from the stack by default */
int cpu_64bit = 0;
+/*
+ * when spinning through pmap_remove
+ * ensure that we don't spend too much
+ * time with preemption disabled.
+ * I'm setting the current threshold
+ * to 20us
+ */
+#define MAX_PREEMPTION_LATENCY_NS 20000
+
+uint64_t max_preemption_latency_tsc = 0;
+
/*
* Private data structures.
/*
* For each vm_page_t, there is a list of all currently
* valid virtual mappings of that page. An entry is
- * a pv_entry_t; the list is the pv_table.
+ * a pv_rooted_entry_t; the list is the pv_table.
+ *
+ * N.B. with the new combo rooted/hashed scheme it is
+ * only possibly to remove individual non-rooted entries
+ * if they are found via the hashed chains as there is no
+ * way to unlink the singly linked hashed entries if navigated to
+ * via the queue list off the rooted entries. Think of it as
+ * hash/walk/pull, keeping track of the prev pointer while walking
+ * the singly linked hash list. All of this is to save memory and
+ * keep both types of pv_entries as small as possible.
*/
+/*
+
+PV HASHING Changes - JK 1/2007
+
+Pve's establish physical to virtual mappings. These are used for aliasing of a
+physical page to (potentially many) virtual addresses within pmaps. In the previous
+implementation the structure of the pv_entries (each 16 bytes in size) was
+
typedef struct pv_entry {
- struct pv_entry *next; /* next pv_entry */
- pmap_t pmap; /* pmap where mapping lies */
- vm_map_offset_t va; /* virtual address for mapping */
+ struct pv_entry_t next;
+ pmap_t pmap;
+ vm_map_offset_t va;
} *pv_entry_t;
-#define PV_ENTRY_NULL ((pv_entry_t) 0)
+An initial array of these is created at boot time, one per physical page of memory,
+indexed by the physical page number. Additionally, a pool of entries is created from a
+pv_zone to be used as needed by pmap_enter() when it is creating new mappings.
+Originally, we kept this pool around because the code in pmap_enter() was unable to
+block if it needed an entry and none were available - we'd panic. Some time ago I
+restructured the pmap_enter() code so that for user pmaps it can block while zalloc'ing
+a pv structure and restart, removing a panic from the code (in the case of the kernel
+pmap we cannot block and still panic, so, we keep a separate hot pool for use only on
+kernel pmaps). The pool has not been removed since there is a large performance gain
+keeping freed pv's around for reuse and not suffering the overhead of zalloc for every new pv we need.
+
+As pmap_enter() created new mappings it linked the new pve's for them off the fixed
+pv array for that ppn (off the next pointer). These pve's are accessed for several
+operations, one of them being address space teardown. In that case, we basically do this
+
+ for (every page/pte in the space) {
+ calc pve_ptr from the ppn in the pte
+ for (every pv in the list for the ppn) {
+ if (this pv is for this pmap/vaddr) {
+ do housekeeping
+ unlink/free the pv
+ }
+ }
+ }
+
+The problem arose when we were running, say 8000 (or even 2000) apache or other processes
+and one or all terminate. The list hanging off each pv array entry could have thousands of
+entries. We were continuously linearly searching each of these lists as we stepped through
+the address space we were tearing down. Because of the locks we hold, likely taking a cache
+miss for each node, and interrupt disabling for MP issues the system became completely
+unresponsive for many seconds while we did this.
+
+Realizing that pve's are accessed in two distinct ways (linearly running the list by ppn
+for operations like pmap_page_protect and finding and modifying/removing a single pve as
+part of pmap_enter processing) has led to modifying the pve structures and databases.
+
+There are now two types of pve structures. A "rooted" structure which is basically the
+original structure accessed in an array by ppn, and a ''hashed'' structure accessed on a
+hash list via a hash of [pmap, vaddr]. These have been designed with the two goals of
+minimizing wired memory and making the lookup of a ppn faster. Since a vast majority of
+pages in the system are not aliased and hence represented by a single pv entry I've kept
+the rooted entry size as small as possible because there is one of these dedicated for
+every physical page of memory. The hashed pve's are larger due to the addition of the hash
+link and the ppn entry needed for matching while running the hash list to find the entry we
+are looking for. This way, only systems that have lots of aliasing (like 2000+ httpd procs)
+will pay the extra memory price. Both structures have the same first three fields allowing
+some simplification in the code.
+
+They have these shapes
+
+typedef struct pv_rooted_entry {
+ queue_head_t qlink;
+ vm_map_offset_t va;
+ pmap_t pmap;
+} *pv_rooted_entry_t;
+
+
+typedef struct pv_hashed_entry {
+ queue_head_t qlink;
+ vm_map_offset_t va;
+ pmap_t pmap;
+ ppnum_t ppn;
+ struct pv_hashed_entry *nexth;
+} *pv_hashed_entry_t;
+
+The main flow difference is that the code is now aware of the rooted entry and the hashed
+entries. Code that runs the pv list still starts with the rooted entry and then continues
+down the qlink onto the hashed entries. Code that is looking up a specific pv entry first
+checks the rooted entry and then hashes and runs the hash list for the match. The hash list
+lengths are much smaller than the original pv lists that contained all aliases for the specific ppn.
+
+*/
-pv_entry_t pv_head_table; /* array of entries, one per page */
+typedef struct pv_rooted_entry { /* first three entries must match pv_hashed_entry_t */
+ queue_head_t qlink;
+ vm_map_offset_t va; /* virtual address for mapping */
+ pmap_t pmap; /* pmap where mapping lies */
+} *pv_rooted_entry_t;
+
+#define PV_ROOTED_ENTRY_NULL ((pv_rooted_entry_t) 0)
+
+pv_rooted_entry_t pv_head_table; /* array of entries, one per page */
+
+typedef struct pv_hashed_entry { /* first three entries must match pv_rooted_entry_t */
+ queue_head_t qlink;
+ vm_map_offset_t va;
+ pmap_t pmap;
+ ppnum_t ppn;
+ struct pv_hashed_entry *nexth;
+} *pv_hashed_entry_t;
+
+#define PV_HASHED_ENTRY_NULL ((pv_hashed_entry_t)0)
+
+#define NPVHASH 4095 /* MUST BE 2^N - 1 */
+pv_hashed_entry_t *pv_hash_table; /* hash lists */
+
+uint32_t npvhash = 0;
+
+/* #define PV_DEBUG 1 uncomment to enable some PV debugging code */
+#ifdef PV_DEBUG
+#define CHK_NPVHASH() if(0 == npvhash) panic("npvhash uninitialized");
+#else
+#define CHK_NPVHASH()
+#endif
/*
* pv_list entries are kept on a list that can only be accessed
* with the pmap system locked (at SPLVM, not in the cpus_active set).
- * The list is refilled from the pv_list_zone if it becomes empty.
+ * The list is refilled from the pv_hashed_list_zone if it becomes empty.
*/
-pv_entry_t pv_free_list; /* free list at SPLVM */
-decl_simple_lock_data(,pv_free_list_lock)
+pv_rooted_entry_t pv_free_list = PV_ROOTED_ENTRY_NULL; /* free list at SPLVM */
+pv_hashed_entry_t pv_hashed_free_list = PV_HASHED_ENTRY_NULL;
+pv_hashed_entry_t pv_hashed_kern_free_list = PV_HASHED_ENTRY_NULL;
+decl_simple_lock_data(,pv_hashed_free_list_lock)
+decl_simple_lock_data(,pv_hashed_kern_free_list_lock)
+decl_simple_lock_data(,pv_hash_table_lock)
+
int pv_free_count = 0;
-#define PV_LOW_WATER_MARK 5000
-#define PV_ALLOC_CHUNK 2000
+int pv_hashed_free_count = 0;
+int pv_kern_free_count = 0;
+int pv_hashed_kern_free_count = 0;
+#define PV_HASHED_LOW_WATER_MARK 5000
+#define PV_HASHED_KERN_LOW_WATER_MARK 100
+#define PV_HASHED_ALLOC_CHUNK 2000
+#define PV_HASHED_KERN_ALLOC_CHUNK 50
thread_call_t mapping_adjust_call;
static thread_call_data_t mapping_adjust_call_data;
-int mappingrecurse = 0;
-
-#define PV_ALLOC(pv_e) { \
- simple_lock(&pv_free_list_lock); \
- if ((pv_e = pv_free_list) != 0) { \
- pv_free_list = pv_e->next; \
- pv_free_count--; \
- if (pv_free_count < PV_LOW_WATER_MARK) \
+uint32_t mappingrecurse = 0;
+
+#define PV_HASHED_ALLOC(pvh_e) { \
+ simple_lock(&pv_hashed_free_list_lock); \
+ if ((pvh_e = pv_hashed_free_list) != 0) { \
+ pv_hashed_free_list = (pv_hashed_entry_t)pvh_e->qlink.next; \
+ pv_hashed_free_count--; \
+ if (pv_hashed_free_count < PV_HASHED_LOW_WATER_MARK) \
+ if (hw_compare_and_store(0,1,(u_int *)&mappingrecurse)) \
+ thread_call_enter(mapping_adjust_call); \
+ } \
+ simple_unlock(&pv_hashed_free_list_lock); \
+}
+
+#define PV_HASHED_FREE_LIST(pvh_eh, pvh_et, pv_cnt) { \
+ simple_lock(&pv_hashed_free_list_lock); \
+ pvh_et->qlink.next = (queue_entry_t)pv_hashed_free_list; \
+ pv_hashed_free_list = pvh_eh; \
+ pv_hashed_free_count += pv_cnt; \
+ simple_unlock(&pv_hashed_free_list_lock); \
+}
+
+#define PV_HASHED_KERN_ALLOC(pvh_e) { \
+ simple_lock(&pv_hashed_kern_free_list_lock); \
+ if ((pvh_e = pv_hashed_kern_free_list) != 0) { \
+ pv_hashed_kern_free_list = (pv_hashed_entry_t)pvh_e->qlink.next; \
+ pv_hashed_kern_free_count--; \
+ if (pv_hashed_kern_free_count < PV_HASHED_KERN_LOW_WATER_MARK) \
if (hw_compare_and_store(0,1,(u_int *)&mappingrecurse)) \
thread_call_enter(mapping_adjust_call); \
} \
- simple_unlock(&pv_free_list_lock); \
+ simple_unlock(&pv_hashed_kern_free_list_lock); \
}
-#define PV_FREE(pv_e) { \
- simple_lock(&pv_free_list_lock); \
- pv_e->next = pv_free_list; \
- pv_free_list = pv_e; \
- pv_free_count++; \
- simple_unlock(&pv_free_list_lock); \
+#define PV_HASHED_KERN_FREE_LIST(pvh_eh, pvh_et, pv_cnt) { \
+ simple_lock(&pv_hashed_kern_free_list_lock); \
+ pvh_et->qlink.next = (queue_entry_t)pv_hashed_kern_free_list; \
+ pv_hashed_kern_free_list = pvh_eh; \
+ pv_hashed_kern_free_count += pv_cnt; \
+ simple_unlock(&pv_hashed_kern_free_list_lock); \
}
-zone_t pv_list_zone; /* zone of pv_entry structures */
+zone_t pv_hashed_list_zone; /* zone of pv_hashed_entry structures */
static zone_t pdpt_zone;
char *pv_lock_table; /* pointer to array of bits */
#define pv_lock_table_size(n) (((n)+BYTE_SIZE-1)/BYTE_SIZE)
+char *pv_hash_lock_table;
+#define pv_hash_lock_table_size(n) (((n)+BYTE_SIZE-1)/BYTE_SIZE)
+
/*
* First and last physical addresses that we maintain any information
* for. Initialized to zero so that pmap operations done before
* pmap_init won't touch any non-existent structures.
*/
-pmap_paddr_t vm_first_phys = (pmap_paddr_t) 0;
-pmap_paddr_t vm_last_phys = (pmap_paddr_t) 0;
boolean_t pmap_initialized = FALSE;/* Has pmap_init completed? */
static struct vm_object kptobj_object_store;
static vm_object_t kptobj;
/*
- * Index into pv_head table, its lock bits, and the modify/reference
- * bits starting at vm_first_phys.
+ * Index into pv_head table, its lock bits, and the modify/reference and managed bits
*/
-#define pa_index(pa) (i386_btop(pa - vm_first_phys))
+#define pa_index(pa) (i386_btop(pa))
+#define ppn_to_pai(ppn) ((int)ppn)
#define pai_to_pvh(pai) (&pv_head_table[pai])
#define lock_pvh_pai(pai) bit_lock(pai, (void *)pv_lock_table)
#define unlock_pvh_pai(pai) bit_unlock(pai, (void *)pv_lock_table)
+#define pvhashidx(pmap, va) (((uint32_t)pmap ^ ((uint32_t)((uint64_t)va >> PAGE_SHIFT) & 0xFFFFFFFF)) & npvhash)
+#define pvhash(idx) (&pv_hash_table[idx])
+
+#define lock_hash_hash(hash) bit_lock(hash, (void *)pv_hash_lock_table)
+#define unlock_hash_hash(hash) bit_unlock(hash, (void *)pv_hash_lock_table)
+
/*
* Array of physical page attribites for managed pages.
* One byte per physical page.
*/
char *pmap_phys_attributes;
+unsigned int last_managed_page = 0;
/*
* Physical page attributes. Copy bits from PTE definition.
*/
#define PHYS_MODIFIED INTEL_PTE_MOD /* page modified */
#define PHYS_REFERENCED INTEL_PTE_REF /* page referenced */
-#define PHYS_NCACHE INTEL_PTE_NCACHE
+#define PHYS_MANAGED INTEL_PTE_VALID /* page is managed */
/*
* Amount of virtual memory mapped by one
*/
/*
- * Locking Protocols:
+ * Locking Protocols: (changed 2/2007 JK)
*
* There are two structures in the pmap module that need locking:
* the pmaps themselves, and the per-page pv_lists (which are locked
* pmap_remove_all and pmap_copy_on_write operate on a physical page
* basis and want to do the locking in the reverse order, i.e. lock
* a pv_list and then go through all the pmaps referenced by that list.
- * To protect against deadlock between these two cases, the pmap_lock
- * is used. There are three different locking protocols as a result:
- *
- * 1. pmap operations only (pmap_extract, pmap_access, ...) Lock only
- * the pmap.
- *
- * 2. pmap-based operations (pmap_enter, pmap_remove, ...) Get a read
- * lock on the pmap_lock (shared read), then lock the pmap
- * and finally the pv_lists as needed [i.e. pmap lock before
- * pv_list lock.]
*
- * 3. pv_list-based operations (pmap_remove_all, pmap_copy_on_write, ...)
- * Get a write lock on the pmap_lock (exclusive write); this
- * also guaranteees exclusive access to the pv_lists. Lock the
- * pmaps as needed.
- *
- * At no time may any routine hold more than one pmap lock or more than
- * one pv_list lock. Because interrupt level routines can allocate
- * mbufs and cause pmap_enter's, the pmap_lock and the lock on the
- * kernel_pmap can only be held at splhigh.
- */
-
-/*
- * We raise the interrupt level to splvm, to block interprocessor
- * interrupts during pmap operations. We mark the cpu's cr3 inactive
- * while interrupts are blocked.
+ * The system wide pmap lock has been removed. Now, paths take a lock
+ * on the pmap before changing its 'shape' and the reverse order lockers
+ * (coming in by phys ppn) take a lock on the corresponding pv and then
+ * retest to be sure nothing changed during the window before they locked
+ * and can then run up/down the pv lists holding the list lock. This also
+ * lets the pmap layer run (nearly completely) interrupt enabled, unlike
+ * previously.
*/
-#define SPLVM(spl) { \
- spl = splhigh(); \
- CPU_CR3_MARK_INACTIVE(); \
-}
-#define SPLX(spl) { \
- if (current_cpu_datap()->cpu_tlb_invalid) \
- process_pmap_updates(); \
- CPU_CR3_MARK_ACTIVE(); \
- splx(spl); \
-}
-
/*
- * Lock on pmap system
+ * pmap locking
*/
-lock_t pmap_system_lock;
-#define PMAP_READ_LOCK(pmap, spl) { \
- SPLVM(spl); \
- lock_read(&pmap_system_lock); \
+#define PMAP_LOCK(pmap) { \
simple_lock(&(pmap)->lock); \
}
-#define PMAP_WRITE_LOCK(spl) { \
- SPLVM(spl); \
- lock_write(&pmap_system_lock); \
-}
-
-#define PMAP_READ_UNLOCK(pmap, spl) { \
+#define PMAP_UNLOCK(pmap) { \
simple_unlock(&(pmap)->lock); \
- lock_read_done(&pmap_system_lock); \
- SPLX(spl); \
}
-#define PMAP_WRITE_UNLOCK(spl) { \
- lock_write_done(&pmap_system_lock); \
- SPLX(spl); \
+/*
+ * PV locking
+ */
+
+#define LOCK_PVH(index) { \
+ mp_disable_preemption(); \
+ lock_pvh_pai(index); \
}
-#define PMAP_WRITE_TO_READ_LOCK(pmap) { \
- simple_lock(&(pmap)->lock); \
- lock_write_to_read(&pmap_system_lock); \
+#define UNLOCK_PVH(index) { \
+ unlock_pvh_pai(index); \
+ mp_enable_preemption(); \
}
-#define LOCK_PVH(index) lock_pvh_pai(index)
+/*
+ * PV hash locking
+ */
+
+#define LOCK_PV_HASH(hash) lock_hash_hash(hash)
-#define UNLOCK_PVH(index) unlock_pvh_pai(index)
+#define UNLOCK_PV_HASH(hash) unlock_hash_hash(hash)
#if USLOCK_DEBUG
extern int max_lock_loops;
-extern int disableSerialOuput;
#define LOOP_VAR \
unsigned int loop_count; \
- loop_count = disableSerialOuput ? max_lock_loops \
+ loop_count = disable_serial_output ? max_lock_loops \
: max_lock_loops*100
#define LOOP_CHECK(msg, pmap) \
if (--loop_count == 0) { \
int pmap_debug = 0; /* flag for debugging prints */
-unsigned int inuse_ptepages_count = 0; /* debugging */
+unsigned int inuse_ptepages_count = 0;
addr64_t kernel64_cr3;
boolean_t no_shared_cr3 = FALSE; /* -no_shared_cr3 boot arg */
static int nkpt;
extern uint32_t lowGlo;
-extern void *version;
pt_entry_t *DMAP1, *DMAP2;
caddr_t DADDR1;
caddr_t DADDR2;
-#if DEBUG_ALIAS
-#define PMAP_ALIAS_MAX 32
-struct pmap_alias {
- vm_offset_t rpc;
- pmap_t pmap;
- vm_map_offset_t va;
- int cookie;
-#define PMAP_ALIAS_COOKIE 0xdeadbeef
-} pmap_aliasbuf[PMAP_ALIAS_MAX];
-int pmap_alias_index = 0;
-extern vm_offset_t get_rpc();
+static inline
+void pmap_pvh_unlink(pv_hashed_entry_t pv);
+
+/*
+ * unlinks the pv_hashed_entry_t pvh from the singly linked hash chain.
+ * properly deals with the anchor.
+ * must be called with the hash locked, does not unlock it
+ */
+
+static inline
+void pmap_pvh_unlink(pv_hashed_entry_t pvh)
+{
+ pv_hashed_entry_t curh;
+ pv_hashed_entry_t *pprevh;
+ int pvhash_idx;
+
+ CHK_NPVHASH();
+ pvhash_idx = pvhashidx(pvh->pmap, pvh->va);
+
+ pprevh = pvhash(pvhash_idx);
-#endif /* DEBUG_ALIAS */
+#if PV_DEBUG
+ if (NULL == *pprevh) panic("pvh_unlink null anchor"); /* JK DEBUG */
+#endif
+ curh = *pprevh;
+
+ while (PV_HASHED_ENTRY_NULL != curh) {
+ if (pvh == curh)
+ break;
+ pprevh = &curh->nexth;
+ curh = curh->nexth;
+ }
+ if (PV_HASHED_ENTRY_NULL == curh) panic("pmap_pvh_unlink no pvh");
+ *pprevh = pvh->nexth;
+ return;
+}
/*
* for legacy, returns the address of the pde entry.
((vm_offset_t)((vaddr>>PDPTSHIFT)&(NPDPTPG-1))));
}
- return (0);
+ return (NULL);
}
/*
((vm_offset_t)((vaddr>>PDSHIFT)&(NPDPG-1))));
}
- return (0);
+ return (NULL);
}
+/*
+ * Because the page tables (top 3 levels) are mapped into per cpu windows,
+ * callers must either disable interrupts or disable preemption before calling
+ * one of the pte mapping routines (e.g. pmap_pte()) as the returned vaddr
+ * is in one of those mapped windows and that cannot be allowed to change until
+ * the caller is done using the returned pte pointer. When done, the caller
+ * restores interrupts or preemption to its previous state after which point the
+ * vaddr for the returned pte can no longer be used
+ */
/*
pde = pmap_pde(pmap,vaddr);
if (pde && ((*pde & INTEL_PTE_VALID))) {
- if (pmap == kernel_pmap) {
- return (vtopte(vaddr)); /* compat kernel still has pte's mapped */
- }
-
+ if (pmap == kernel_pmap)
+ return (vtopte(vaddr)); /* compat kernel still has pte's mapped */
+#if TESTING
+ if (ml_get_interrupts_enabled() && get_preemption_level() == 0)
+ panic("pmap_pte: unsafe call");
+#endif
assert(ml_get_interrupts_enabled() == 0 || get_preemption_level() != 0);
newpf = *pde & PG_FRAME;
((vm_offset_t)i386_btop(vaddr) & (NPTEPG-1)));
}
- return(0);
+ return(NULL);
}
-
+
/*
* Map memory at initialization. The physical addresses being
* Back-door routine for mapping kernel VM at initialization.
* Useful for mapping memory outside the range
* Sets no-cache, A, D.
- * [vm_first_phys, vm_last_phys) (i.e., devices).
* Otherwise like pmap_map.
*/
vm_offset_t
{
pt_entry_t template;
pt_entry_t *pte;
+ spl_t spl;
template = pa_to_pte(start_addr)
| INTEL_PTE_REF
template |= INTEL_PTE_WRITE;
while (start_addr < end_addr) {
+ spl = splhigh();
pte = pmap_pte(kernel_pmap, (vm_map_offset_t)virt);
if (pte == PT_ENTRY_NULL) {
panic("pmap_map_bd: Invalid kernel address\n");
}
pmap_store_pte(pte, template);
+ splx(spl);
pte_increment_pa(template);
virt += PAGE_SIZE;
start_addr += PAGE_SIZE;
extern void *sectHIBB;
extern int sectSizeHIB;
+void
+pmap_cpu_init(void)
+{
+ /*
+ * Here early in the life of a processor (from cpu_mode_init()).
+ * If we're not in 64-bit mode, enable the global TLB feature.
+ * Note: regardless of mode we continue to set the global attribute
+ * bit in ptes for all (32-bit) global pages such as the commpage.
+ */
+ if (!cpu_64bit) {
+ set_cr4(get_cr4() | CR4_PGE);
+ }
+
+ /*
+ * Initialize the per-cpu, TLB-related fields.
+ */
+ current_cpu_datap()->cpu_active_cr3 = kernel_pmap->pm_cr3;
+ current_cpu_datap()->cpu_tlb_invalid = FALSE;
+}
vm_offset_t
pmap_high_shared_remap(enum high_fixed_addresses e, vm_offset_t va, int sz)
pt_entry_t *ptep;
pmap_paddr_t pa;
int i;
+ spl_t s;
assert(0 == (va & PAGE_MASK)); /* expecting page aligned */
+ s = splhigh();
ptep = pmap_pte(kernel_pmap, (vm_map_offset_t)ve);
for (i=0; i< sz; i++) {
va+= PAGE_SIZE;
ptep++;
}
+ splx(s);
return ve;
}
vm_offset_t haddr;
struct __gdt_desc_struct gdt_desc = {0,0,0};
struct __idt_desc_struct idt_desc = {0,0,0};
+ spl_t s;
#if MACH_KDB
struct i386_tss *ttss;
#endif
kprintf("HIGH_MEM_BASE 0x%x fixed per-cpu begin 0x%x\n",
HIGH_MEM_BASE,pmap_index_to_virt(HIGH_FIXED_CPUS_BEGIN));
+ s = splhigh();
pte_unique_base = pmap_pte(kernel_pmap, (vm_map_offset_t)pmap_index_to_virt(HIGH_FIXED_CPUS_BEGIN));
+ splx(s);
if (i386_btop(&hi_remap_etext - &hi_remap_text + 1) >
HIGH_FIXED_TRAMPS_END - HIGH_FIXED_TRAMPS + 1)
int i;
int wpkernel, boot_arg;
pdpt_entry_t *pdpt;
+ spl_t s;
vm_last_addr = VM_MAX_KERNEL_ADDRESS; /* Set the highest address
* known to VM */
kernel_pmap = &kernel_pmap_store;
kernel_pmap->ref_count = 1;
kernel_pmap->nx_enabled = FALSE;
- kernel_pmap->pm_64bit = 0;
+ kernel_pmap->pm_task_map = TASK_MAP_32BIT;
kernel_pmap->pm_obj = (vm_object_t) NULL;
kernel_pmap->dirbase = (pd_entry_t *)((unsigned int)IdlePTD | KERNBASE);
kernel_pmap->pdirbase = (pmap_paddr_t)((int)IdlePTD);
high_shared_pde = *pmap_pde(kernel_pmap, HIGH_MEM_BASE);
/* make sure G bit is on for high shared pde entry */
high_shared_pde |= INTEL_PTE_GLOBAL;
+ s = splhigh();
pmap_store_pte(pmap_pde(kernel_pmap, HIGH_MEM_BASE), high_shared_pde);
+ splx(s);
nkpt = NKPT;
inuse_ptepages_count += NKPT;
SYSMAP(caddr_t, DMAP1, DADDR1, 1);
SYSMAP(caddr_t, DMAP2, DADDR2, 1); /* XXX temporary - can remove */
-
- lock_init(&pmap_system_lock,
- FALSE, /* NOT a sleep lock */
- 0, 0);
-
virtual_avail = va;
+ if (PE_parse_boot_arg("npvhash", &npvhash)) {
+ if (0 != ((npvhash+1) & npvhash)) {
+ kprintf("invalid hash %d, must be ((2^N)-1), using default %d\n",npvhash,NPVHASH);
+ npvhash = NPVHASH;
+ }
+ } else {
+ npvhash = NPVHASH;
+ }
+ printf("npvhash=%d\n",npvhash);
+
wpkernel = 1;
if (PE_parse_boot_arg("wpkernel", &boot_arg)) {
if (boot_arg == 0)
wpkernel = 0;
}
+ s = splhigh();
+
/* Remap kernel text readonly unless the "wpkernel" boot-arg is present
- * and set to 0.
+ * and set to 0.
*/
if (wpkernel)
{
/* map lowmem global page into fixed addr 0x2000 */
if (0 == (pte = pmap_pte(kernel_pmap,0x2000))) panic("lowmem pte");
-
+ assert(0 == ((vm_offset_t) &lowGlo & PAGE_MASK)); /* make sure it is defined on page boundary */
pmap_store_pte(pte, kvtophys((vm_offset_t)&lowGlo)|INTEL_PTE_VALID|INTEL_PTE_REF|INTEL_PTE_MOD|INTEL_PTE_WIRED|INTEL_PTE_RW);
+ splx(s);
flush_tlb();
simple_lock_init(&kernel_pmap->lock, 0);
- simple_lock_init(&pv_free_list_lock, 0);
+ simple_lock_init(&pv_hashed_free_list_lock, 0);
+ simple_lock_init(&pv_hashed_kern_free_list_lock, 0);
+ simple_lock_init(&pv_hash_table_lock,0);
- pmap_init_high_shared();
+ pmap_init_high_shared();
pde_mapped_size = PDE_MAPPED_SIZE;
pmap_store_pte((ppml4+KERNEL_UBER_PML4_INDEX), *(ppml4+0));
kernel64_cr3 = (addr64_t) kernel_pmap->pm_cr3;
- cpu_IA32e_enable(current_cpu_datap());
- current_cpu_datap()->cpu_is64bit = TRUE;
- /* welcome to a 64 bit world */
- /* Re-initialize and load descriptors */
+ /* Re-initialize descriptors and prepare to switch modes */
cpu_desc_init64(&cpu_data_master, TRUE);
- cpu_desc_load64(&cpu_data_master);
- fast_syscall_init64();
+ current_cpu_datap()->cpu_is64bit = TRUE;
+ current_cpu_datap()->cpu_active_cr3 = kernel64_cr3;
pde_mapped_size = 512*4096 ;
ml_set_interrupts_enabled(istate);
-
}
+
+ /* Set 64-bit mode if required. */
+ cpu_mode_init(&cpu_data_master);
+
kernel_pmap->pm_hold = (vm_offset_t)kernel_pmap->pm_pml4;
kprintf("Kernel virtual space from 0x%x to 0x%x.\n",
*/
if (PE_parse_boot_arg("-no_shared_cr3", &no_shared_cr3)) {
kprintf("Shared kernel address space disabled\n");
- }
+ }
+
+#ifdef PMAP_TRACES
+ if (PE_parse_boot_arg("-pmap_trace", &pmap_trace)) {
+ kprintf("Kernel traces for pmap operations enabled\n");
+ }
+#endif /* PMAP_TRACES */
}
void
vm_offset_t addr;
register vm_size_t s;
vm_map_offset_t vaddr;
- ppnum_t ppn;
+ ppnum_t ppn;
/*
* Allocate memory for the pv_head_table and its lock bits,
* the modify bit array, and the pte_page table.
*/
- /* zero bias all these arrays now instead of off avail_start
- so we cover all memory */
+ /*
+ * zero bias all these arrays now instead of off avail_start
+ * so we cover all memory
+ */
+
npages = i386_btop(avail_end);
- s = (vm_size_t) (sizeof(struct pv_entry) * npages
- + pv_lock_table_size(npages)
+ s = (vm_size_t) (sizeof(struct pv_rooted_entry) * npages
+ + (sizeof (struct pv_hashed_entry_t *) * (npvhash+1))
+ + pv_lock_table_size(npages)
+ + pv_hash_lock_table_size((npvhash+1))
+ npages);
s = round_page(s);
memset((char *)addr, 0, s);
+#if PV_DEBUG
+ if (0 == npvhash) panic("npvhash not initialized");
+#endif
+
/*
* Allocate the structures first to preserve word-alignment.
*/
- pv_head_table = (pv_entry_t) addr;
+ pv_head_table = (pv_rooted_entry_t) addr;
addr = (vm_offset_t) (pv_head_table + npages);
+ pv_hash_table = (pv_hashed_entry_t *)addr;
+ addr = (vm_offset_t) (pv_hash_table + (npvhash + 1));
+
pv_lock_table = (char *) addr;
addr = (vm_offset_t) (pv_lock_table + pv_lock_table_size(npages));
+ pv_hash_lock_table = (char *) addr;
+ addr = (vm_offset_t) (pv_hash_lock_table + pv_hash_lock_table_size((npvhash+1)));
+
pmap_phys_attributes = (char *) addr;
+ {
+ unsigned int i;
+ unsigned int pn;
+ ppnum_t last_pn;
+ pmap_memory_region_t *pmptr = pmap_memory_regions;
+
+ last_pn = i386_btop(avail_end);
+
+ for (i = 0; i < pmap_memory_region_count; i++, pmptr++) {
+ if (pmptr->type == kEfiConventionalMemory) {
+ for (pn = pmptr->base; pn <= pmptr->end; pn++) {
+ if (pn < last_pn) {
+ pmap_phys_attributes[pn] |= PHYS_MANAGED;
+
+ if (pn > last_managed_page)
+ last_managed_page = pn;
+ }
+ }
+ }
+ }
+ }
/*
* Create the zone of physical maps,
*/
s = (vm_size_t) sizeof(struct pmap);
pmap_zone = zinit(s, 400*s, 4096, "pmap"); /* XXX */
- s = (vm_size_t) sizeof(struct pv_entry);
- pv_list_zone = zinit(s, 10000*s, 4096, "pv_list"); /* XXX */
+ s = (vm_size_t) sizeof(struct pv_hashed_entry);
+ pv_hashed_list_zone = zinit(s, 10000*s, 4096, "pv_list"); /* XXX */
s = 63;
pdpt_zone = zinit(s, 400*s, 4096, "pdpt"); /* XXX */
- /*
- * Only now, when all of the data structures are allocated,
- * can we set vm_first_phys and vm_last_phys. If we set them
- * too soon, the kmem_alloc_wired above will try to use these
- * data structures and blow up.
- */
-
- /* zero bias this now so we cover all memory */
- vm_first_phys = 0;
- vm_last_phys = avail_end;
-
kptobj = &kptobj_object_store;
- _vm_object_allocate((vm_object_size_t)NKPDE, kptobj);
+ _vm_object_allocate((vm_object_size_t)(NPGPTD*NPTDPG), kptobj);
kernel_pmap->pm_obj = kptobj;
/* create pv entries for kernel pages mapped by low level
vaddr = (vm_map_offset_t)0;
for (ppn = 0; ppn < i386_btop(avail_start) ; ppn++ ) {
- pv_entry_t pv_e;
+ pv_rooted_entry_t pv_e;
pv_e = pai_to_pvh(ppn);
pv_e->va = vaddr;
vaddr += PAGE_SIZE;
- kernel_pmap->stats.resident_count++;
pv_e->pmap = kernel_pmap;
- pv_e->next = PV_ENTRY_NULL;
+ queue_init(&pv_e->qlink);
}
pmap_initialized = TRUE;
/*
- * Initializie pmap cache.
+ * Initialize pmap cache.
*/
pmap_cache_list = PMAP_NULL;
pmap_cache_count = 0;
simple_lock_init(&pmap_cache_lock, 0);
+
+ max_preemption_latency_tsc = tmrCvt((uint64_t)MAX_PREEMPTION_LATENCY_NS, tscFCvtn2t);
+
}
void
}
-#define valid_page(x) (pmap_initialized && pmap_valid_page(x))
+#define managed_page(x) ( (unsigned int)x <= last_managed_page && (pmap_phys_attributes[x] & PHYS_MANAGED) )
+/*
+ * this function is only used for debugging fron the vm layer
+ */
boolean_t
pmap_verify_free(
ppnum_t pn)
{
- pmap_paddr_t phys;
- pv_entry_t pv_h;
+ pv_rooted_entry_t pv_h;
int pai;
- spl_t spl;
boolean_t result;
assert(pn != vm_page_fictitious_addr);
- phys = (pmap_paddr_t)i386_ptob(pn);
+
if (!pmap_initialized)
return(TRUE);
- if (!pmap_valid_page(pn))
- return(FALSE);
+ if (pn == vm_page_guard_addr)
+ return TRUE;
- PMAP_WRITE_LOCK(spl);
+ pai = ppn_to_pai(pn);
+ if (!managed_page(pai))
+ return(FALSE);
+ pv_h = pai_to_pvh(pn);
+ result = (pv_h->pmap == PMAP_NULL);
+ return(result);
+}
- pai = pa_index(phys);
- pv_h = pai_to_pvh(pai);
+boolean_t
+pmap_is_empty(
+ pmap_t pmap,
+ vm_map_offset_t vstart,
+ vm_map_offset_t vend)
+{
+ vm_map_offset_t offset;
+ ppnum_t phys_page;
- result = (pv_h->pmap == PMAP_NULL);
- PMAP_WRITE_UNLOCK(spl);
+ if (pmap == PMAP_NULL) {
+ return TRUE;
+ }
+ for (offset = vstart;
+ offset < vend;
+ offset += PAGE_SIZE_64) {
+ phys_page = pmap_find_phys(pmap, offset);
+ if (phys_page) {
+ if (pmap != kernel_pmap &&
+ pmap->pm_task_map == TASK_MAP_32BIT &&
+ offset >= HIGH_MEM_BASE) {
+ /*
+ * The "high_shared_pde" is used to share
+ * the entire top-most 2MB of address space
+ * between the kernel and all 32-bit tasks.
+ * So none of this can be removed from 32-bit
+ * tasks.
+ * Let's pretend there's nothing up
+ * there...
+ */
+ return TRUE;
+ }
+ kprintf("pmap_is_empty(%p,0x%llx,0x%llx): "
+ "page %d at 0x%llx\n",
+ pmap, vstart, vend, phys_page, offset);
+ return FALSE;
+ }
+ }
- return(result);
+ return TRUE;
}
+
/*
* Create and return a physical map.
*
pmap_t
pmap_create(
vm_map_size_t sz,
- boolean_t is_64bit)
+ boolean_t is_64bit)
{
- register pmap_t p;
+ pmap_t p;
int i;
vm_offset_t va;
vm_size_t size;
pdpt_entry_t *pdpt;
pml4_entry_t *pml4p;
- int template;
pd_entry_t *pdp;
+ int template;
spl_t s;
+ PMAP_TRACE(PMAP_CODE(PMAP__CREATE) | DBG_FUNC_START,
+ (int) (sz>>32), (int) sz, (int) is_64bit, 0, 0);
+
size = (vm_size_t) sz;
/*
p = (pmap_t) zalloc(pmap_zone);
if (PMAP_NULL == p)
- panic("pmap_create zalloc");
+ panic("pmap_create zalloc");
/* init counts now since we'll be bumping some */
simple_lock_init(&p->lock, 0);
p->stats.resident_count = 0;
+ p->stats.resident_max = 0;
p->stats.wired_count = 0;
p->ref_count = 1;
p->nx_enabled = 1;
- p->pm_64bit = is_64bit;
- p->pm_kernel_cr3 = FALSE;
p->pm_shared = FALSE;
+ assert(!is_64bit || cpu_64bit);
+ p->pm_task_map = is_64bit ? TASK_MAP_64BIT : TASK_MAP_32BIT;;
+
if (!cpu_64bit) {
- /* legacy 32 bit setup */
- /* in the legacy case the pdpt layer is hardwired to 4 entries and each
- * entry covers 1GB of addr space */
- if (KERN_SUCCESS != kmem_alloc_wired(kernel_map, (vm_offset_t *)(&p->dirbase), NBPTD))
- panic("pmap_create kmem_alloc_wired");
- p->pm_hold = (vm_offset_t)zalloc(pdpt_zone);
- if ((vm_offset_t)NULL == p->pm_hold) {
- panic("pdpt zalloc");
- }
- pdpt = (pdpt_entry_t *) (( p->pm_hold + 31) & ~31);
- p->pm_cr3 = (pmap_paddr_t)kvtophys((vm_offset_t)pdpt);
- if (NULL == (p->pm_obj = vm_object_allocate((vm_object_size_t)(NPGPTD*NPTDPG))))
- panic("pmap_create vm_object_allocate");
+ /* legacy 32 bit setup */
+ /* in the legacy case the pdpt layer is hardwired to 4 entries and each
+ * entry covers 1GB of addr space */
+ if (KERN_SUCCESS != kmem_alloc_wired(kernel_map, (vm_offset_t *)(&p->dirbase), NBPTD))
+ panic("pmap_create kmem_alloc_wired");
+ p->pm_hold = (vm_offset_t)zalloc(pdpt_zone);
+ if ((vm_offset_t)NULL == p->pm_hold) {
+ panic("pdpt zalloc");
+ }
+ pdpt = (pdpt_entry_t *) (( p->pm_hold + 31) & ~31);
+ p->pm_cr3 = (pmap_paddr_t)kvtophys((vm_offset_t)pdpt);
+ if (NULL == (p->pm_obj = vm_object_allocate((vm_object_size_t)(NPGPTD*NPTDPG))))
+ panic("pmap_create vm_object_allocate");
- memset((char *)p->dirbase, 0, NBPTD);
+ memset((char *)p->dirbase, 0, NBPTD);
- va = (vm_offset_t)p->dirbase;
- p->pdirbase = kvtophys(va);
+ va = (vm_offset_t)p->dirbase;
+ p->pdirbase = kvtophys(va);
- template = cpu_64bit ? INTEL_PTE_VALID|INTEL_PTE_RW|INTEL_PTE_USER|INTEL_PTE_REF : INTEL_PTE_VALID;
- for (i = 0; i< NPGPTD; i++, pdpt++) {
- pmap_paddr_t pa;
- pa = (pmap_paddr_t) kvtophys(va + i386_ptob(i));
- pmap_store_pte(pdpt, pa | template);
- }
+ template = cpu_64bit ? INTEL_PTE_VALID|INTEL_PTE_RW|INTEL_PTE_USER|INTEL_PTE_REF : INTEL_PTE_VALID;
+ for (i = 0; i< NPGPTD; i++, pdpt++ ) {
+ pmap_paddr_t pa;
+ pa = (pmap_paddr_t) kvtophys(va + i386_ptob(i));
+ pmap_store_pte(pdpt, pa | template);
+ }
- /* map the high shared pde */
- pmap_store_pte(pmap_pde(p, HIGH_MEM_BASE), high_shared_pde);
+ /* map the high shared pde */
+ s = splhigh();
+ pmap_store_pte(pmap_pde(p, HIGH_MEM_BASE), high_shared_pde);
+ splx(s);
} else {
+ /* 64 bit setup */
- /* 64 bit setup */
+ /* alloc the pml4 page in kernel vm */
+ if (KERN_SUCCESS != kmem_alloc_wired(kernel_map, (vm_offset_t *)(&p->pm_hold), PAGE_SIZE))
+ panic("pmap_create kmem_alloc_wired pml4");
- /* alloc the pml4 page in kernel vm */
- if (KERN_SUCCESS != kmem_alloc_wired(kernel_map, (vm_offset_t *)(&p->pm_hold), PAGE_SIZE))
- panic("pmap_create kmem_alloc_wired pml4");
+ memset((char *)p->pm_hold, 0, PAGE_SIZE);
+ p->pm_cr3 = (pmap_paddr_t)kvtophys((vm_offset_t)p->pm_hold);
- memset((char *)p->pm_hold, 0, PAGE_SIZE);
- p->pm_cr3 = (pmap_paddr_t)kvtophys((vm_offset_t)p->pm_hold);
+ vm_page_lock_queues();
+ inuse_ptepages_count++;
+ vm_page_unlock_queues();
- inuse_ptepages_count++;
- p->stats.resident_count++;
- p->stats.wired_count++;
+ /* allocate the vm_objs to hold the pdpt, pde and pte pages */
- /* allocate the vm_objs to hold the pdpt, pde and pte pages */
+ if (NULL == (p->pm_obj_pml4 = vm_object_allocate((vm_object_size_t)(NPML4PGS))))
+ panic("pmap_create pdpt obj");
- if (NULL == (p->pm_obj_pml4 = vm_object_allocate((vm_object_size_t)(NPML4PGS))))
- panic("pmap_create pdpt obj");
+ if (NULL == (p->pm_obj_pdpt = vm_object_allocate((vm_object_size_t)(NPDPTPGS))))
+ panic("pmap_create pdpt obj");
- if (NULL == (p->pm_obj_pdpt = vm_object_allocate((vm_object_size_t)(NPDPTPGS))))
- panic("pmap_create pdpt obj");
+ if (NULL == (p->pm_obj = vm_object_allocate((vm_object_size_t)(NPDEPGS))))
+ panic("pmap_create pte obj");
- if (NULL == (p->pm_obj = vm_object_allocate((vm_object_size_t)(NPDEPGS))))
- panic("pmap_create pte obj");
+ /* uber space points to uber mapped kernel */
+ s = splhigh();
+ pml4p = pmap64_pml4(p, 0ULL);
+ pmap_store_pte((pml4p+KERNEL_UBER_PML4_INDEX),*kernel_pmap->pm_pml4);
- /* uber space points to uber mapped kernel */
- s = splhigh();
- pml4p = pmap64_pml4(p, 0ULL);
- pmap_store_pte((pml4p+KERNEL_UBER_PML4_INDEX),*kernel_pmap->pm_pml4);
- if (!is_64bit) {
- while ((pdp = pmap64_pde(p, (uint64_t)HIGH_MEM_BASE)) == PD_ENTRY_NULL) {
- splx(s);
- pmap_expand_pdpt(p, (uint64_t)HIGH_MEM_BASE); /* need room for another pde entry */
- s = splhigh();
- }
- pmap_store_pte(pdp, high_shared_pde);
- }
- splx(s);
+ if (!is_64bit) {
+ while ((pdp = pmap64_pde(p, (uint64_t)HIGH_MEM_BASE)) == PD_ENTRY_NULL) {
+ splx(s);
+ pmap_expand_pdpt(p, (uint64_t)HIGH_MEM_BASE); /* need room for another pde entry */
+ s = splhigh();
+ }
+ pmap_store_pte(pdp, high_shared_pde);
+ }
+ splx(s);
}
+ PMAP_TRACE(PMAP_CODE(PMAP__CREATE) | DBG_FUNC_START,
+ (int) p, is_64bit, 0, 0, 0);
+
return(p);
}
+/*
+ * The following routines implement the shared address optmization for 64-bit
+ * users with a 4GB page zero.
+ *
+ * pmap_set_4GB_pagezero()
+ * is called in the exec and fork paths to mirror the kernel's
+ * mapping in the bottom 4G of the user's pmap. The task mapping changes
+ * from TASK_MAP_64BIT to TASK_MAP_64BIT_SHARED. This routine returns
+ * without doing anything if the -no_shared_cr3 boot-arg is set.
+ *
+ * pmap_clear_4GB_pagezero()
+ * is called in the exec/exit paths to undo this mirror. The task mapping
+ * reverts to TASK_MAP_64BIT. In addition, we switch to the kernel's
+ * CR3 by calling pmap_load_kernel_cr3().
+ *
+ * pmap_load_kernel_cr3()
+ * loads cr3 with the kernel's page table. In addition to being called
+ * by pmap_clear_4GB_pagezero(), it is used both prior to teardown and
+ * when we go idle in the context of a shared map.
+ *
+ * Further notes on per-cpu data used:
+ *
+ * cpu_kernel_cr3 is the cr3 for the kernel's pmap.
+ * This is loaded in a trampoline on entering the kernel
+ * from a 32-bit user (or non-shared-cr3 64-bit user).
+ * cpu_task_cr3 is the cr3 for the current thread.
+ * This is loaded in a trampoline as we exit the kernel.
+ * cpu_active_cr3 reflects the cr3 currently loaded.
+ * However, the low order bit is set when the
+ * processor is idle or interrupts are disabled
+ * while the system pmap lock is held. It is used by
+ * tlb shoot-down.
+ * cpu_task_map indicates whether the task cr3 belongs to
+ * a 32-bit, a 64-bit or a 64-bit shared map.
+ * The latter allows the avoidance of the cr3 load
+ * on kernel entry and exit.
+ * cpu_tlb_invalid set TRUE when a tlb flush is requested.
+ * If the cr3 is "inactive" (the cpu is idle or the
+ * system-wide pmap lock is held) this not serviced by
+ * an IPI but at time when the cr3 becomes "active".
+ */
+
void
pmap_set_4GB_pagezero(pmap_t p)
{
- int spl;
pdpt_entry_t *user_pdptp;
pdpt_entry_t *kern_pdptp;
- assert(p->pm_64bit);
+ assert(p->pm_task_map != TASK_MAP_32BIT);
/* Kernel-shared cr3 may be disabled by boot arg. */
if (no_shared_cr3)
/*
* Set the bottom 4 3rd-level pte's to be the kernel's.
*/
- spl = splhigh();
+ PMAP_LOCK(p);
while ((user_pdptp = pmap64_pdpt(p, 0x0)) == PDPT_ENTRY_NULL) {
- splx(spl);
+ PMAP_UNLOCK(p);
pmap_expand_pml4(p, 0x0);
- spl = splhigh();
+ PMAP_LOCK(p);
}
kern_pdptp = kernel_pmap->pm_pdpt;
pmap_store_pte(user_pdptp+0, *(kern_pdptp+0));
pmap_store_pte(user_pdptp+1, *(kern_pdptp+1));
pmap_store_pte(user_pdptp+2, *(kern_pdptp+2));
pmap_store_pte(user_pdptp+3, *(kern_pdptp+3));
-
- p->pm_kernel_cr3 = TRUE;
-
- splx(spl);
-
-}
-
-void
-pmap_load_kernel_cr3(void)
-{
- uint32_t kernel_cr3;
-
- assert(!ml_get_interrupts_enabled());
-
- /*
- * Reload cr3 with the true kernel cr3.
- * Note: kernel's pml4 resides below 4GB physical.
- */
- kernel_cr3 = current_cpu_datap()->cpu_kernel_cr3;
- set_cr3(kernel_cr3);
- current_cpu_datap()->cpu_active_cr3 = kernel_cr3;
- current_cpu_datap()->cpu_task_map = TASK_MAP_32BIT;
- current_cpu_datap()->cpu_tlb_invalid = FALSE;
- __asm__ volatile("mfence");
+ p->pm_task_map = TASK_MAP_64BIT_SHARED;
+ PMAP_UNLOCK(p);
}
void
pmap_clear_4GB_pagezero(pmap_t p)
{
- int spl;
pdpt_entry_t *user_pdptp;
- if (!p->pm_kernel_cr3)
+ if (p->pm_task_map != TASK_MAP_64BIT_SHARED)
return;
- spl = splhigh();
+ PMAP_LOCK(p);
+
+ p->pm_task_map = TASK_MAP_64BIT;
+
+ pmap_load_kernel_cr3();
+
user_pdptp = pmap64_pdpt(p, 0x0);
pmap_store_pte(user_pdptp+0, 0);
pmap_store_pte(user_pdptp+1, 0);
pmap_store_pte(user_pdptp+2, 0);
pmap_store_pte(user_pdptp+3, 0);
- p->pm_kernel_cr3 = FALSE;
+ PMAP_UNLOCK(p);
+}
- pmap_load_kernel_cr3();
+void
+pmap_load_kernel_cr3(void)
+{
+ uint64_t kernel_cr3;
- splx(spl);
+ assert(ml_get_interrupts_enabled() == 0 || get_preemption_level() != 0);
+
+ /*
+ * Reload cr3 with the true kernel cr3.
+ */
+ kernel_cr3 = current_cpu_datap()->cpu_kernel_cr3;
+ set64_cr3(kernel_cr3);
+ current_cpu_datap()->cpu_active_cr3 = kernel_cr3;
+ current_cpu_datap()->cpu_tlb_invalid = FALSE;
+ __asm__ volatile("mfence");
}
/*
register pmap_t p)
{
register int c;
- spl_t s;
-#if 0
- register pt_entry_t *pdep;
- register vm_page_t m;
-#endif
if (p == PMAP_NULL)
return;
- SPLVM(s);
- simple_lock(&p->lock);
+
+ PMAP_TRACE(PMAP_CODE(PMAP__DESTROY) | DBG_FUNC_START,
+ (int) p, 0, 0, 0, 0);
+
+ PMAP_LOCK(p);
+
c = --p->ref_count;
+
if (c == 0) {
/*
* If some cpu is not using the physical pmap pointer that it
* physically on the right pmap:
*/
PMAP_UPDATE_TLBS(p,
- VM_MIN_ADDRESS,
- VM_MAX_KERNEL_ADDRESS);
-
+ 0x0ULL,
+ 0xFFFFFFFFFFFFF000ULL);
}
- simple_unlock(&p->lock);
- SPLX(s);
+
+ PMAP_UNLOCK(p);
if (c != 0) {
- return; /* still in use */
+ PMAP_TRACE(PMAP_CODE(PMAP__DESTROY) | DBG_FUNC_END,
+ (int) p, 1, 0, 0, 0);
+ return; /* still in use */
}
/*
* Free the memory maps, then the
* pmap structure.
*/
-
if (!cpu_64bit) {
-#if 0
- pdep = (pt_entry_t *)p->dirbase;
+ vm_page_lock_queues();
+ inuse_ptepages_count -= p->pm_obj->resident_page_count;
+ vm_page_unlock_queues();
- while (pdep < (pt_entry_t *)&p->dirbase[(UMAXPTDI+1)]) {
- int ind;
+ kmem_free(kernel_map, (vm_offset_t)p->dirbase, NBPTD);
+ zfree(pdpt_zone, (void *)p->pm_hold);
- if (*pdep & INTEL_PTE_VALID) {
- ind = pdep - (pt_entry_t *)&p->dirbase[0];
+ vm_object_deallocate(p->pm_obj);
+ } else {
+ /* 64 bit */
+ int inuse_ptepages = 0;
- vm_object_lock(p->pm_obj);
- m = vm_page_lookup(p->pm_obj, (vm_object_offset_t)ind);
- if (m == VM_PAGE_NULL) {
- panic("pmap_destroy: pte page not in object");
- }
- vm_page_lock_queues();
- vm_page_free(m);
- inuse_ptepages_count--;
+ /* free 64 bit mode structs */
+ inuse_ptepages++;
+ kmem_free(kernel_map, (vm_offset_t)p->pm_hold, PAGE_SIZE);
- vm_object_unlock(p->pm_obj);
- vm_page_unlock_queues();
+ inuse_ptepages += p->pm_obj_pml4->resident_page_count;
+ vm_object_deallocate(p->pm_obj_pml4);
- /*
- * Clear pdes, this might be headed for the cache.
- */
- pmap_store_pte(pdep, 0);
- pdep++;
- }
- else {
- pmap_store_pte(pdep, 0);
- pdep++;
- }
-
- }
-#else
- inuse_ptepages_count -= p->pm_obj->resident_page_count;
-#endif
- vm_object_deallocate(p->pm_obj);
- kmem_free(kernel_map, (vm_offset_t)p->dirbase, NBPTD);
- zfree(pdpt_zone, (void *)p->pm_hold);
- } else {
-
- /* 64 bit */
-
- pmap_unmap_sharedpage(p);
-
- /* free 64 bit mode structs */
- inuse_ptepages_count--;
- kmem_free(kernel_map, (vm_offset_t)p->pm_hold, PAGE_SIZE);
-
- inuse_ptepages_count -= p->pm_obj_pml4->resident_page_count;
- vm_object_deallocate(p->pm_obj_pml4);
-
- inuse_ptepages_count -= p->pm_obj_pdpt->resident_page_count;
- vm_object_deallocate(p->pm_obj_pdpt);
+ inuse_ptepages += p->pm_obj_pdpt->resident_page_count;
+ vm_object_deallocate(p->pm_obj_pdpt);
- inuse_ptepages_count -= p->pm_obj->resident_page_count;
- vm_object_deallocate(p->pm_obj);
+ inuse_ptepages += p->pm_obj->resident_page_count;
+ vm_object_deallocate(p->pm_obj);
+ vm_page_lock_queues();
+ inuse_ptepages_count -= inuse_ptepages;
+ vm_page_unlock_queues();
}
-
zfree(pmap_zone, p);
+
+ PMAP_TRACE(PMAP_CODE(PMAP__DESTROY) | DBG_FUNC_END,
+ 0, 0, 0, 0, 0);
+
}
/*
pmap_reference(
register pmap_t p)
{
- spl_t s;
if (p != PMAP_NULL) {
- SPLVM(s);
- simple_lock(&p->lock);
+ PMAP_LOCK(p);
p->ref_count++;
- simple_unlock(&p->lock);
- SPLX(s);
+ PMAP_UNLOCK(p);;
}
}
* Assumes that the pte-page exists.
*/
-static void
+void
pmap_remove_range(
pmap_t pmap,
- vm_map_offset_t vaddr,
+ vm_map_offset_t start_vaddr,
pt_entry_t *spte,
pt_entry_t *epte)
{
register pt_entry_t *cpte;
- int num_removed, num_unwired;
+ pv_hashed_entry_t pvh_et = PV_HASHED_ENTRY_NULL;
+ pv_hashed_entry_t pvh_eh = PV_HASHED_ENTRY_NULL;
+ pv_hashed_entry_t pvh_e;
+ int pvh_cnt = 0;
+ int num_removed, num_unwired, num_found;
int pai;
pmap_paddr_t pa;
+ vm_map_offset_t vaddr;
+ int pvhash_idx;
+ uint32_t pv_cnt;
num_removed = 0;
num_unwired = 0;
+ num_found = 0;
- for (cpte = spte; cpte < epte;
- cpte++, vaddr += PAGE_SIZE) {
+ if (pmap != kernel_pmap &&
+ pmap->pm_task_map == TASK_MAP_32BIT &&
+ start_vaddr >= HIGH_MEM_BASE) {
+ /*
+ * The range is in the "high_shared_pde" which is shared
+ * between the kernel and all 32-bit tasks. It holds
+ * the 32-bit commpage but also the trampolines, GDT, etc...
+ * so we can't let user tasks remove anything from it.
+ */
+ return;
+ }
+
+ /* invalidate the PTEs first to "freeze" them */
+ for (cpte = spte, vaddr = start_vaddr;
+ cpte < epte;
+ cpte++, vaddr += PAGE_SIZE_64) {
pa = pte_to_pa(*cpte);
if (pa == 0)
continue;
+ num_found++;
if (iswired(*cpte))
num_unwired++;
- if (!valid_page(i386_btop(pa))) {
+ pai = pa_index(pa);
+ if (!managed_page(pai)) {
/*
* Outside range of managed physical memory.
* Just remove the mappings.
*/
- register pt_entry_t *lpte = cpte;
-
- pmap_store_pte(lpte, 0);
+ pmap_store_pte(cpte, 0);
continue;
}
- num_removed++;
+
+ /* invalidate the PTE */
+ pmap_update_pte(cpte, *cpte, (*cpte & ~INTEL_PTE_VALID));
+ }
+
+ if (num_found == 0) {
+ /* nothing was changed: we're done */
+ goto update_counts;
+ }
+
+ /* propagate the invalidates to other CPUs */
+
+ PMAP_UPDATE_TLBS(pmap, start_vaddr, vaddr);
+
+ for (cpte = spte, vaddr = start_vaddr;
+ cpte < epte;
+ cpte++, vaddr += PAGE_SIZE_64) {
+
+ pa = pte_to_pa(*cpte);
+ if (pa == 0)
+ continue;
pai = pa_index(pa);
+
LOCK_PVH(pai);
+ pa = pte_to_pa(*cpte);
+ if (pa == 0) {
+ UNLOCK_PVH(pai);
+ continue;
+ }
+
+ num_removed++;
+
/*
- * Get the modify and reference bits.
+ * Get the modify and reference bits, then
+ * nuke the entry in the page table
*/
- {
- register pt_entry_t *lpte;
-
- lpte = cpte;
- pmap_phys_attributes[pai] |=
- *lpte & (PHYS_MODIFIED|PHYS_REFERENCED);
- pmap_store_pte(lpte, 0);
-
- }
+ /* remember reference and change */
+ pmap_phys_attributes[pai] |=
+ (char)(*cpte & (PHYS_MODIFIED | PHYS_REFERENCED));
+ /* completely invalidate the PTE */
+ pmap_store_pte(cpte, 0);
/*
* Remove the mapping from the pvlist for
* this physical page.
*/
{
- register pv_entry_t pv_h, prev, cur;
+ pv_rooted_entry_t pv_h;
+ pv_hashed_entry_t *pprevh;
+ ppnum_t ppn = (ppnum_t)pai;
pv_h = pai_to_pvh(pai);
- if (pv_h->pmap == PMAP_NULL) {
- panic("pmap_remove: null pv_list!");
- }
- if (pv_h->va == vaddr && pv_h->pmap == pmap) {
+ pvh_e = PV_HASHED_ENTRY_NULL;
+ if (pv_h->pmap == PMAP_NULL)
+ panic("pmap_remove_range: null pv_list!");
+
+ if (pv_h->va == vaddr && pv_h->pmap == pmap) { /* rooted or not */
/*
- * Header is the pv_entry. Copy the next one
- * to header and free the next one (we cannot
- * free the header)
+ * Header is the pv_rooted_entry. We can't free that. If there is a queued
+ * entry after this one we remove that
+ * from the ppn queue, we remove it from the hash chain
+ * and copy it to the rooted entry. Then free it instead.
*/
- cur = pv_h->next;
- if (cur != PV_ENTRY_NULL) {
- *pv_h = *cur;
- PV_FREE(cur);
+
+ pvh_e = (pv_hashed_entry_t)queue_next(&pv_h->qlink);
+ if (pv_h != (pv_rooted_entry_t)pvh_e) { /* any queued after rooted? */
+ CHK_NPVHASH();
+ pvhash_idx = pvhashidx(pvh_e->pmap,pvh_e->va);
+ LOCK_PV_HASH(pvhash_idx);
+ remque(&pvh_e->qlink);
+ {
+ pprevh = pvhash(pvhash_idx);
+ if (PV_HASHED_ENTRY_NULL == *pprevh) {
+ panic("pmap_remove_range empty hash removing rooted pv");
+ }
}
- else {
- pv_h->pmap = PMAP_NULL;
+ pmap_pvh_unlink(pvh_e);
+ UNLOCK_PV_HASH(pvhash_idx);
+ pv_h->pmap = pvh_e->pmap;
+ pv_h->va = pvh_e->va; /* dispose of pvh_e */
+ } else { /* none queued after rooted */
+ pv_h->pmap = PMAP_NULL;
+ pvh_e = PV_HASHED_ENTRY_NULL;
+ } /* any queued after rooted */
+
+ } else { /* rooted or not */
+ /* not removing rooted pv. find it on hash chain, remove from ppn queue and
+ * hash chain and free it */
+ CHK_NPVHASH();
+ pvhash_idx = pvhashidx(pmap,vaddr);
+ LOCK_PV_HASH(pvhash_idx);
+ pprevh = pvhash(pvhash_idx);
+ if (PV_HASHED_ENTRY_NULL == *pprevh) {
+ panic("pmap_remove_range empty hash removing hashed pv");
}
- }
- else {
- cur = pv_h;
- do {
- prev = cur;
- if ((cur = prev->next) == PV_ENTRY_NULL) {
- panic("pmap-remove: mapping not in pv_list!");
- }
- } while (cur->va != vaddr || cur->pmap != pmap);
- prev->next = cur->next;
- PV_FREE(cur);
- }
+ pvh_e = *pprevh;
+ pmap_pv_hashlist_walks++;
+ pv_cnt = 0;
+ while (PV_HASHED_ENTRY_NULL != pvh_e) {
+ pv_cnt++;
+ if (pvh_e->pmap == pmap && pvh_e->va == vaddr && pvh_e->ppn == ppn) break;
+ pprevh = &pvh_e->nexth;
+ pvh_e = pvh_e->nexth;
+ }
+ pmap_pv_hashlist_cnts += pv_cnt;
+ if (pmap_pv_hashlist_max < pv_cnt) pmap_pv_hashlist_max = pv_cnt;
+ if (PV_HASHED_ENTRY_NULL == pvh_e) panic("pmap_remove_range pv not on hash");
+ *pprevh = pvh_e->nexth;
+ remque(&pvh_e->qlink);
+ UNLOCK_PV_HASH(pvhash_idx);
+
+ } /* rooted or not */
+
UNLOCK_PVH(pai);
- }
+
+ if (pvh_e != PV_HASHED_ENTRY_NULL) {
+ pvh_e->qlink.next = (queue_entry_t)pvh_eh;
+ pvh_eh = pvh_e;
+
+ if (pvh_et == PV_HASHED_ENTRY_NULL) {
+ pvh_et = pvh_e;
+ }
+
+ pvh_cnt++;
+ }
+
+ } /* removing mappings for this phy page */
+ } /* for loop */
+
+ if (pvh_eh != PV_HASHED_ENTRY_NULL) {
+ PV_HASHED_FREE_LIST(pvh_eh, pvh_et, pvh_cnt);
}
+update_counts:
/*
* Update the counts
*/
+#if TESTING
+ if (pmap->stats.resident_count < num_removed)
+ panic("pmap_remove_range: resident_count");
+#endif
assert(pmap->stats.resident_count >= num_removed);
- pmap->stats.resident_count -= num_removed;
+ OSAddAtomic(-num_removed, (SInt32 *) &pmap->stats.resident_count);
+
+#if TESTING
+ if (pmap->stats.wired_count < num_unwired)
+ panic("pmap_remove_range: wired_count");
+#endif
assert(pmap->stats.wired_count >= num_unwired);
- pmap->stats.wired_count -= num_unwired;
+ OSAddAtomic(-num_unwired, (SInt32 *) &pmap->stats.wired_count);
+
+ return;
}
/*
addr64_t s64,
addr64_t e64)
{
- spl_t spl;
- register pt_entry_t *pde;
- register pt_entry_t *spte, *epte;
- addr64_t l64;
- addr64_t orig_s64;
+ pt_entry_t *pde;
+ pt_entry_t *spte, *epte;
+ addr64_t l64;
+ addr64_t orig_s64;
+ uint64_t deadline;
+
+ pmap_intr_assert();
if (map == PMAP_NULL || s64 == e64)
return;
+
+ PMAP_TRACE(PMAP_CODE(PMAP__REMOVE) | DBG_FUNC_START,
+ (int) map,
+ (int) (s64>>32), (int) s64,
+ (int) (e64>>32), (int) e64);
+
+ PMAP_LOCK(map);
+
+#if 0
+ /*
+ * Check that address range in the kernel does not overlap the stacks.
+ * We initialize local static min/max variables once to avoid making
+ * 2 function calls for every remove. Note also that these functions
+ * both return 0 before kernel stacks have been initialized, and hence
+ * the panic is not triggered in this case.
+ */
+ if (map == kernel_pmap) {
+ static vm_offset_t kernel_stack_min = 0;
+ static vm_offset_t kernel_stack_max = 0;
+
+ if (kernel_stack_min == 0) {
+ kernel_stack_min = min_valid_stack_address();
+ kernel_stack_max = max_valid_stack_address();
+ }
+ if ((kernel_stack_min <= s64 && s64 < kernel_stack_max) ||
+ (kernel_stack_min < e64 && e64 <= kernel_stack_max))
+ panic("pmap_remove() attempted in kernel stack");
+ }
+#else
- PMAP_READ_LOCK(map, spl);
+ /*
+ * The values of kernel_stack_min and kernel_stack_max are no longer
+ * relevant now that we allocate kernel stacks anywhere in the kernel map,
+ * so the old code above no longer applies. If we wanted to check that
+ * we weren't removing a mapping of a page in a kernel stack we'd have to
+ * mark the PTE with an unused bit and check that here.
+ */
+
+#endif
+
+ deadline = rdtsc64() + max_preemption_latency_tsc;
orig_s64 = s64;
while (s64 < e64) {
+
l64 = (s64 + pde_mapped_size) & ~(pde_mapped_size-1);
if (l64 > e64)
l64 = e64;
pde = pmap_pde(map, s64);
+
if (pde && (*pde & INTEL_PTE_VALID)) {
spte = (pt_entry_t *)pmap_pte(map, (s64 & ~(pde_mapped_size-1)));
spte = &spte[ptenum(s64)];
epte = &spte[intel_btop(l64-s64)];
+
pmap_remove_range(map, s64, spte, epte);
}
s64 = l64;
pde++;
+
+ if (s64 < e64 && rdtsc64() >= deadline) {
+ PMAP_UNLOCK(map)
+ PMAP_LOCK(map)
+
+ deadline = rdtsc64() + max_preemption_latency_tsc;
+ }
+
}
- PMAP_UPDATE_TLBS(map, orig_s64, e64);
- PMAP_READ_UNLOCK(map, spl);
+ PMAP_UNLOCK(map);
+
+ PMAP_TRACE(PMAP_CODE(PMAP__REMOVE) | DBG_FUNC_END,
+ (int) map, 0, 0, 0, 0);
+
}
/*
ppnum_t pn,
vm_prot_t prot)
{
- pv_entry_t pv_h, prev;
- register pv_entry_t pv_e;
- register pt_entry_t *pte;
+ pv_hashed_entry_t pvh_eh = PV_HASHED_ENTRY_NULL;
+ pv_hashed_entry_t pvh_et = PV_HASHED_ENTRY_NULL;
+ pv_hashed_entry_t nexth;
+ int pvh_cnt = 0;
+ pv_rooted_entry_t pv_h;
+ pv_rooted_entry_t pv_e;
+ pv_hashed_entry_t pvh_e;
+ pt_entry_t *pte;
int pai;
register pmap_t pmap;
- spl_t spl;
boolean_t remove;
- pmap_paddr_t phys;
+ int pvhash_idx;
+ pmap_intr_assert();
assert(pn != vm_page_fictitious_addr);
+ if (pn == vm_page_guard_addr)
+ return;
- if (!valid_page(pn)) {
+ pai = ppn_to_pai(pn);
+
+ if (!managed_page(pai)) {
/*
* Not a managed page.
*/
return;
}
+ PMAP_TRACE(PMAP_CODE(PMAP__PAGE_PROTECT) | DBG_FUNC_START,
+ (int) pn, (int) prot, 0, 0, 0);
+
/*
* Determine the new protection.
*/
remove = TRUE;
break;
}
- phys = (pmap_paddr_t)i386_ptob(pn);
- pai = pa_index(phys);
- pv_h = pai_to_pvh(pai);
+ pv_h = pai_to_pvh(pai);
- /*
- * Lock the pmap system first, since we will be changing
- * several pmaps.
- */
- PMAP_WRITE_LOCK(spl);
+ LOCK_PVH(pai);
/*
* Walk down PV list, changing or removing all mappings.
- * We do not have to lock the pv_list because we have
- * the entire pmap system locked.
*/
if (pv_h->pmap != PMAP_NULL) {
- prev = pv_e = pv_h;
+ pv_e = pv_h;
+ pvh_e = (pv_hashed_entry_t)pv_e; /* cheat */
- do {
- register vm_map_offset_t vaddr;
+ do {
+ register vm_map_offset_t vaddr;
+ pmap = pv_e->pmap;
- pmap = pv_e->pmap;
- /*
- * Lock the pmap to block pmap_extract and similar routines.
- */
- simple_lock(&pmap->lock);
+ vaddr = pv_e->va;
+ pte = pmap_pte(pmap, vaddr);
+
+ if (0 == pte) {
+ kprintf("pmap_page_protect pmap %p pn 0x%x vaddr 0x%llx\n",pmap, pn, vaddr);
+ panic("pmap_page_protect");
+ }
- vaddr = pv_e->va;
- pte = pmap_pte(pmap, vaddr);
- if(0 == pte) {
- kprintf("pmap_page_protect pmap 0x%x pn 0x%x vaddr 0x%llx\n",pmap, pn, vaddr);
- panic("pmap_page_protect");
- }
- /*
- * Consistency checks.
- */
- /* assert(*pte & INTEL_PTE_VALID); XXX */
- /* assert(pte_to_phys(*pte) == phys); */
+ nexth = (pv_hashed_entry_t)queue_next(&pvh_e->qlink); /* if there is one */
+ /*
+ * Remove the mapping if new protection is NONE
+ * or if write-protecting a kernel mapping.
+ */
+ if (remove || pmap == kernel_pmap) {
+ /*
+ * Remove the mapping, collecting any modify bits.
+ */
+ pmap_update_pte(pte, *pte, (*pte & ~INTEL_PTE_VALID));
- /*
- * Remove the mapping if new protection is NONE
- * or if write-protecting a kernel mapping.
- */
- if (remove || pmap == kernel_pmap) {
- /*
- * Remove the mapping, collecting any modify bits.
- */
- pmap_store_pte(pte, *pte & ~INTEL_PTE_VALID);
+ PMAP_UPDATE_TLBS(pmap, vaddr, vaddr + PAGE_SIZE);
- PMAP_UPDATE_TLBS(pmap, vaddr, vaddr + PAGE_SIZE);
+ pmap_phys_attributes[pai] |= *pte & (PHYS_MODIFIED|PHYS_REFERENCED);
- pmap_phys_attributes[pai] |= *pte & (PHYS_MODIFIED|PHYS_REFERENCED);
+ pmap_store_pte(pte, 0);
- pmap_store_pte(pte, 0);
+#if TESTING
+ if (pmap->stats.resident_count < 1)
+ panic("pmap_page_protect: resident_count");
+#endif
+ assert(pmap->stats.resident_count >= 1);
+ OSAddAtomic(-1, (SInt32 *) &pmap->stats.resident_count);
+ /*
+ * Deal with the pv_rooted_entry.
+ */
- //XXX breaks DEBUG build assert(pmap->stats.resident_count >= 1);
- pmap->stats.resident_count--;
+ if (pv_e == pv_h) {
+ /*
+ * Fix up head later.
+ */
+ pv_h->pmap = PMAP_NULL;
+ }
+ else {
+ /*
+ * Delete this entry.
+ */
+ CHK_NPVHASH();
+ pvhash_idx = pvhashidx(pvh_e->pmap,pvh_e->va);
+ LOCK_PV_HASH(pvhash_idx);
+ remque(&pvh_e->qlink);
+ pmap_pvh_unlink(pvh_e);
+ UNLOCK_PV_HASH(pvhash_idx);
+
+ pvh_e->qlink.next = (queue_entry_t)pvh_eh;
+ pvh_eh = pvh_e;
+
+ if (pvh_et == PV_HASHED_ENTRY_NULL)
+ pvh_et = pvh_e;
+ pvh_cnt++;
+ }
+ } else {
+ /*
+ * Write-protect.
+ */
+ pmap_update_pte(pte, *pte, (*pte & ~INTEL_PTE_WRITE));
+ PMAP_UPDATE_TLBS(pmap, vaddr, vaddr + PAGE_SIZE);
+ }
- /*
- * Remove the pv_entry.
- */
- if (pv_e == pv_h) {
- /*
- * Fix up head later.
- */
- pv_h->pmap = PMAP_NULL;
- }
- else {
- /*
- * Delete this entry.
- */
- prev->next = pv_e->next;
- PV_FREE(pv_e);
- }
- } else {
- /*
- * Write-protect.
- */
- pmap_store_pte(pte, *pte & ~INTEL_PTE_WRITE);
+ pvh_e = nexth;
+ } while ((pv_e = (pv_rooted_entry_t)nexth) != pv_h);
- PMAP_UPDATE_TLBS(pmap, vaddr, vaddr + PAGE_SIZE);
- /*
- * Advance prev.
- */
- prev = pv_e;
- }
+ /*
+ * If pv_head mapping was removed, fix it up.
+ */
- simple_unlock(&pmap->lock);
+ if (pv_h->pmap == PMAP_NULL) {
+ pvh_e = (pv_hashed_entry_t)queue_next(&pv_h->qlink);
+
+ if (pvh_e != (pv_hashed_entry_t)pv_h) {
+ CHK_NPVHASH();
+ pvhash_idx = pvhashidx(pvh_e->pmap,pvh_e->va);
+ LOCK_PV_HASH(pvhash_idx);
+ remque(&pvh_e->qlink);
+ pmap_pvh_unlink(pvh_e);
+ UNLOCK_PV_HASH(pvhash_idx);
+ pv_h->pmap = pvh_e->pmap;
+ pv_h->va = pvh_e->va;
+ pvh_e->qlink.next = (queue_entry_t)pvh_eh;
+ pvh_eh = pvh_e;
+
+ if (pvh_et == PV_HASHED_ENTRY_NULL)
+ pvh_et = pvh_e;
+ pvh_cnt++;
+ }
+ }
+ }
+ if (pvh_eh != PV_HASHED_ENTRY_NULL) {
+ PV_HASHED_FREE_LIST(pvh_eh, pvh_et, pvh_cnt);
+ }
- } while ((pv_e = prev->next) != PV_ENTRY_NULL);
+ UNLOCK_PVH(pai);
- /*
- * If pv_head mapping was removed, fix it up.
- */
- if (pv_h->pmap == PMAP_NULL) {
- pv_e = pv_h->next;
+ PMAP_TRACE(PMAP_CODE(PMAP__PAGE_PROTECT) | DBG_FUNC_END,
+ 0, 0, 0, 0, 0);
- if (pv_e != PV_ENTRY_NULL) {
- *pv_h = *pv_e;
- PV_FREE(pv_e);
- }
- }
- }
- PMAP_WRITE_UNLOCK(spl);
}
+
/*
* Routine:
* pmap_disconnect
unsigned int pmap_disconnect(
ppnum_t pa)
{
- pmap_page_protect(pa, 0); /* disconnect the page */
+ pmap_page_protect(pa, 0); /* disconnect the page */
return (pmap_get_refmod(pa)); /* return ref/chg status */
}
register pt_entry_t *spte, *epte;
vm_map_offset_t lva;
vm_map_offset_t orig_sva;
- spl_t spl;
boolean_t set_NX;
+ int num_found = 0;
+
+ pmap_intr_assert();
if (map == PMAP_NULL)
return;
return;
}
+ PMAP_TRACE(PMAP_CODE(PMAP__PROTECT) | DBG_FUNC_START,
+ (int) map,
+ (int) (sva>>32), (int) sva,
+ (int) (eva>>32), (int) eva);
+
if ( (prot & VM_PROT_EXECUTE) || !nx_enabled || !map->nx_enabled )
set_NX = FALSE;
else
set_NX = TRUE;
- SPLVM(spl);
- simple_lock(&map->lock);
+ PMAP_LOCK(map);
orig_sva = sva;
while (sva < eva) {
epte = &spte[intel_btop(lva-sva)];
while (spte < epte) {
+
if (*spte & INTEL_PTE_VALID) {
if (prot & VM_PROT_WRITE)
- pmap_store_pte(spte, *spte | INTEL_PTE_WRITE);
+ pmap_update_pte(spte, *spte, (*spte | INTEL_PTE_WRITE));
else
- pmap_store_pte(spte, *spte & ~INTEL_PTE_WRITE);
+ pmap_update_pte(spte, *spte, (*spte & ~INTEL_PTE_WRITE));
if (set_NX == TRUE)
- pmap_store_pte(spte, *spte | INTEL_PTE_NX);
+ pmap_update_pte(spte, *spte, (*spte | INTEL_PTE_NX));
else
- pmap_store_pte(spte, *spte & ~INTEL_PTE_NX);
+ pmap_update_pte(spte, *spte, (*spte & ~INTEL_PTE_NX));
+ num_found++;
}
spte++;
}
}
sva = lva;
- pde++;
}
- PMAP_UPDATE_TLBS(map, orig_sva, eva);
+ if (num_found)
+ PMAP_UPDATE_TLBS(map, orig_sva, eva);
+
+ PMAP_UNLOCK(map);
+
+ PMAP_TRACE(PMAP_CODE(PMAP__PROTECT) | DBG_FUNC_END,
+ 0, 0, 0, 0, 0);
- simple_unlock(&map->lock);
- SPLX(spl);
}
/* Map a (possibly) autogenned block */
int attr,
__unused unsigned int flags)
{
- uint32_t page;
+ uint32_t page;
- for (page = 0; page < size; page++) {
- pmap_enter(pmap, va, pa, prot, attr, TRUE);
- va += PAGE_SIZE;
- pa++;
- }
+ for (page = 0; page < size; page++) {
+ pmap_enter(pmap, va, pa, prot, attr, TRUE);
+ va += PAGE_SIZE;
+ pa++;
+ }
}
void
pmap_enter(
register pmap_t pmap,
- vm_map_offset_t vaddr,
+ vm_map_offset_t vaddr,
ppnum_t pn,
vm_prot_t prot,
unsigned int flags,
boolean_t wired)
{
register pt_entry_t *pte;
- register pv_entry_t pv_h;
+ register pv_rooted_entry_t pv_h;
register int pai;
- pv_entry_t pv_e;
+ pv_hashed_entry_t pvh_e;
+ pv_hashed_entry_t pvh_new;
+ pv_hashed_entry_t *hashp;
pt_entry_t template;
- spl_t spl;
pmap_paddr_t old_pa;
- pmap_paddr_t pa = (pmap_paddr_t)i386_ptob(pn);
+ pmap_paddr_t pa = (pmap_paddr_t)i386_ptob(pn);
boolean_t need_tlbflush = FALSE;
boolean_t set_NX;
+ char oattr;
+ int pvhash_idx;
+ uint32_t pv_cnt;
+ boolean_t old_pa_locked;
- XPR(0x80000000, "%x/%x: pmap_enter %x/%qx/%x\n",
- current_thread(),
- current_thread(),
- pmap, vaddr, pn);
-
+ pmap_intr_assert();
assert(pn != vm_page_fictitious_addr);
if (pmap_debug)
printf("pmap(%qx, %x)\n", vaddr, pn);
if (pmap == PMAP_NULL)
return;
+ if (pn == vm_page_guard_addr)
+ return;
+
+ PMAP_TRACE(PMAP_CODE(PMAP__ENTER) | DBG_FUNC_START,
+ (int) pmap,
+ (int) (vaddr>>32), (int) vaddr,
+ (int) pn, prot);
if ( (prot & VM_PROT_EXECUTE) || !nx_enabled || !pmap->nx_enabled )
set_NX = FALSE;
* and allocate one. Then we will retry, throughing away
* the allocated entry later (if we no longer need it).
*/
- pv_e = PV_ENTRY_NULL;
- PMAP_READ_LOCK(pmap, spl);
+ pvh_new = PV_HASHED_ENTRY_NULL;
+Retry:
+ pvh_e = PV_HASHED_ENTRY_NULL;
+
+ PMAP_LOCK(pmap);
/*
* Expand pmap to include this pte. Assume that
/*
* Must unlock to expand the pmap.
*/
- PMAP_READ_UNLOCK(pmap, spl);
-
+ PMAP_UNLOCK(pmap);
pmap_expand(pmap, vaddr); /* going to grow pde level page(s) */
+ PMAP_LOCK(pmap);
+ }
+
+ old_pa = pte_to_pa(*pte);
+ pai = pa_index(old_pa);
+ old_pa_locked = FALSE;
+
+ /*
+ * if we have a previous managed page, lock the pv entry now. after
+ * we lock it, check to see if someone beat us to the lock and if so
+ * drop the lock
+ */
- PMAP_READ_LOCK(pmap, spl);
+ if ((0 != old_pa) && managed_page(pai)) {
+ LOCK_PVH(pai);
+ old_pa_locked = TRUE;
+ old_pa = pte_to_pa(*pte);
+ if (0 == old_pa) {
+ UNLOCK_PVH(pai); /* some other path beat us to it */
+ old_pa_locked = FALSE;
+ }
}
+
+
/*
- * Special case if the physical page is already mapped
+ * Special case if the incoming physical page is already mapped
* at this address.
*/
- old_pa = pte_to_pa(*pte);
if (old_pa == pa) {
+
/*
* May be changing its wired attribute or protection
*/
-
+
template = pa_to_pte(pa) | INTEL_PTE_VALID;
if(VM_MEM_NOT_CACHEABLE == (flags & (VM_MEM_NOT_CACHEABLE | VM_WIMG_USE_DEFAULT))) {
if (wired) {
template |= INTEL_PTE_WIRED;
if (!iswired(*pte))
- pmap->stats.wired_count++;
+ OSAddAtomic(+1, (SInt32 *) &pmap->stats.wired_count);
}
else {
if (iswired(*pte)) {
assert(pmap->stats.wired_count >= 1);
- pmap->stats.wired_count--;
+ OSAddAtomic(-1, (SInt32 *) &pmap->stats.wired_count);
}
}
- if (*pte & INTEL_PTE_MOD)
- template |= INTEL_PTE_MOD;
-
- pmap_store_pte(pte, template);
- pte++;
-
- need_tlbflush = TRUE;
+ /* store modified PTE and preserve RC bits */
+ pmap_update_pte(pte, *pte, template | (*pte & (INTEL_PTE_REF | INTEL_PTE_MOD)));
+ if (old_pa_locked) {
+ UNLOCK_PVH(pai);
+ old_pa_locked = FALSE;
+ }
+ need_tlbflush = TRUE;
goto Done;
}
* 2) Add pvlist entry for new mapping
* 3) Enter new mapping.
*
- * SHARING FAULTS IS HORRIBLY BROKEN
- * SHARING_FAULTS complicates this slightly in that it cannot
- * replace the mapping, but must remove it (because adding the
- * pvlist entry for the new mapping may remove others), and
- * hence always enters the new mapping at step 3)
- *
* If the old physical page is not managed step 1) is skipped
* (except for updating the TLBs), and the mapping is
* overwritten at step 3). If the new physical page is not
* to overwrite the old one.
*/
- if (valid_page(i386_btop(old_pa))) {
+ /* invalidate the PTE */
+ pmap_update_pte(pte, *pte, (*pte & ~INTEL_PTE_VALID));
+ /* propagate invalidate everywhere */
+ PMAP_UPDATE_TLBS(pmap, vaddr, vaddr + PAGE_SIZE);
+ /* remember reference and change */
+ oattr = (char)(*pte & (PHYS_MODIFIED | PHYS_REFERENCED));
+ /* completely invalidate the PTE */
+ pmap_store_pte(pte, 0);
- pai = pa_index(old_pa);
- LOCK_PVH(pai);
+ if (managed_page(pai)) {
+#if TESTING
+ if (pmap->stats.resident_count < 1)
+ panic("pmap_enter: resident_count");
+#endif
assert(pmap->stats.resident_count >= 1);
- pmap->stats.resident_count--;
+ OSAddAtomic(-1, (SInt32 *) &pmap->stats.resident_count);
+
if (iswired(*pte)) {
+
+#if TESTING
+ if (pmap->stats.wired_count < 1)
+ panic("pmap_enter: wired_count");
+#endif
assert(pmap->stats.wired_count >= 1);
- pmap->stats.wired_count--;
+ OSAddAtomic(-1, (SInt32 *) &pmap->stats.wired_count);
}
- pmap_phys_attributes[pai] |=
- *pte & (PHYS_MODIFIED|PHYS_REFERENCED);
-
- pmap_store_pte(pte, 0);
+ pmap_phys_attributes[pai] |= oattr;
/*
* Remove the mapping from the pvlist for
* this physical page.
+ * We'll end up with either a rooted pv or a
+ * hashed pv
*/
{
- register pv_entry_t prev, cur;
pv_h = pai_to_pvh(pai);
+
if (pv_h->pmap == PMAP_NULL) {
panic("pmap_enter: null pv_list!");
}
if (pv_h->va == vaddr && pv_h->pmap == pmap) {
/*
- * Header is the pv_entry. Copy the next one
- * to header and free the next one (we cannot
+ * Header is the pv_rooted_entry.
+ * If there is a next one, copy it to the
+ * header and free the next one (we cannot
* free the header)
*/
- cur = pv_h->next;
- if (cur != PV_ENTRY_NULL) {
- *pv_h = *cur;
- pv_e = cur;
- }
- else {
- pv_h->pmap = PMAP_NULL;
+ pvh_e = (pv_hashed_entry_t)queue_next(&pv_h->qlink);
+ if (pvh_e != (pv_hashed_entry_t)pv_h) {
+ pvhash_idx = pvhashidx(pvh_e->pmap, pvh_e->va);
+ LOCK_PV_HASH(pvhash_idx);
+ remque(&pvh_e->qlink);
+ pmap_pvh_unlink(pvh_e);
+ UNLOCK_PV_HASH(pvhash_idx);
+ pv_h->pmap = pvh_e->pmap;
+ pv_h->va = pvh_e->va;
}
+ else {
+ pv_h->pmap = PMAP_NULL;
+ pvh_e = PV_HASHED_ENTRY_NULL;
+ }
}
else {
- cur = pv_h;
- do {
- prev = cur;
- if ((cur = prev->next) == PV_ENTRY_NULL) {
- panic("pmap_enter: mapping not in pv_list!");
- }
- } while (cur->va != vaddr || cur->pmap != pmap);
- prev->next = cur->next;
- pv_e = cur;
+ pv_hashed_entry_t *pprevh;
+ ppnum_t old_ppn;
+ /* wasn't the rooted pv - hash, find it, and unlink it */
+ old_ppn = (ppnum_t)pa_index(old_pa);
+ CHK_NPVHASH();
+ pvhash_idx = pvhashidx(pmap,vaddr);
+ LOCK_PV_HASH(pvhash_idx);
+ pprevh = pvhash(pvhash_idx);
+#if PV_DEBUG
+ if (NULL==pprevh)panic("pmap enter 1");
+#endif
+ pvh_e = *pprevh;
+ pmap_pv_hashlist_walks++;
+ pv_cnt = 0;
+ while (PV_HASHED_ENTRY_NULL != pvh_e) {
+ pv_cnt++;
+ if (pvh_e->pmap == pmap && pvh_e->va == vaddr && pvh_e->ppn == old_ppn) break;
+ pprevh = &pvh_e->nexth;
+ pvh_e = pvh_e->nexth;
+ }
+ pmap_pv_hashlist_cnts += pv_cnt;
+ if (pmap_pv_hashlist_max < pv_cnt) pmap_pv_hashlist_max = pv_cnt;
+ if (PV_HASHED_ENTRY_NULL == pvh_e) panic("pmap_enter: pv not in hash list");
+ if(NULL==pprevh)panic("pmap enter 2");
+ *pprevh = pvh_e->nexth;
+ remque(&pvh_e->qlink);
+ UNLOCK_PV_HASH(pvhash_idx);
}
}
- UNLOCK_PVH(pai);
}
else {
/*
- * old_pa is not managed. Pretend it's zero so code
- * at Step 3) will enter new mapping (overwriting old
- * one). Do removal part of accounting.
+ * old_pa is not managed.
+ * Do removal part of accounting.
*/
- old_pa = (pmap_paddr_t) 0;
if (iswired(*pte)) {
assert(pmap->stats.wired_count >= 1);
- pmap->stats.wired_count--;
+ OSAddAtomic(-1, (SInt32 *) &pmap->stats.wired_count);
}
}
- need_tlbflush = TRUE;
-
}
- if (valid_page(i386_btop(pa))) {
+ /*
+ * if we had a previously managed paged locked, unlock it now
+ */
+
+ if (old_pa_locked) {
+ UNLOCK_PVH(pai);
+ old_pa_locked = FALSE;
+ }
+
+ pai = pa_index(pa); /* now working with new incoming phys page */
+ if (managed_page(pai)) {
/*
* Step 2) Enter the mapping in the PV list for this
* physical page.
*/
+ pv_h = pai_to_pvh(pai);
- pai = pa_index(pa);
-
-
-#if SHARING_FAULTS /* this is horribly broken , do not enable */
-RetryPvList:
- /*
- * We can return here from the sharing fault code below
- * in case we removed the only entry on the pv list and thus
- * must enter the new one in the list header.
- */
-#endif /* SHARING_FAULTS */
LOCK_PVH(pai);
- pv_h = pai_to_pvh(pai);
if (pv_h->pmap == PMAP_NULL) {
/*
- * No mappings yet
+ * No mappings yet, use rooted pv
*/
pv_h->va = vaddr;
pv_h->pmap = pmap;
- pv_h->next = PV_ENTRY_NULL;
+ queue_init(&pv_h->qlink);
}
else {
-#if DEBUG
- {
- /*
- * check that this mapping is not already there
- * or there is no alias for this mapping in the same map
- */
- pv_entry_t e = pv_h;
- while (e != PV_ENTRY_NULL) {
- if (e->pmap == pmap && e->va == vaddr)
- panic("pmap_enter: already in pv_list");
- e = e->next;
- }
- }
-#endif /* DEBUG */
-#if SHARING_FAULTS /* broken, do not enable */
- {
- /*
- * do sharing faults.
- * if we find an entry on this pv list in the same address
- * space, remove it. we know there will not be more
- * than one.
- */
- pv_entry_t e = pv_h;
- pt_entry_t *opte;
-
- while (e != PV_ENTRY_NULL) {
- if (e->pmap == pmap) {
- /*
- * Remove it, drop pv list lock first.
- */
- UNLOCK_PVH(pai);
-
- opte = pmap_pte(pmap, e->va);
- assert(opte != PT_ENTRY_NULL);
- /*
- * Invalidate the translation buffer,
- * then remove the mapping.
- */
- pmap_remove_range(pmap, e->va, opte,
- opte + 1);
-
- PMAP_UPDATE_TLBS(pmap, e->va, e->va + PAGE_SIZE);
-
- /*
- * We could have remove the head entry,
- * so there could be no more entries
- * and so we have to use the pv head entry.
- * so, go back to the top and try the entry
- * again.
- */
- goto RetryPvList;
- }
- e = e->next;
- }
-
- /*
- * check that this mapping is not already there
- */
- e = pv_h;
- while (e != PV_ENTRY_NULL) {
- if (e->pmap == pmap)
- panic("pmap_enter: alias in pv_list");
- e = e->next;
- }
- }
-#endif /* SHARING_FAULTS */
-#if DEBUG_ALIAS
- {
- /*
- * check for aliases within the same address space.
- */
- pv_entry_t e = pv_h;
- vm_offset_t rpc = get_rpc();
-
- while (e != PV_ENTRY_NULL) {
- if (e->pmap == pmap) {
- /*
- * log this entry in the alias ring buffer
- * if it's not there already.
- */
- struct pmap_alias *pma;
- int ii, logit;
-
- logit = TRUE;
- for (ii = 0; ii < pmap_alias_index; ii++) {
- if (pmap_aliasbuf[ii].rpc == rpc) {
- /* found it in the log already */
- logit = FALSE;
- break;
- }
- }
- if (logit) {
- pma = &pmap_aliasbuf[pmap_alias_index];
- pma->pmap = pmap;
- pma->va = vaddr;
- pma->rpc = rpc;
- pma->cookie = PMAP_ALIAS_COOKIE;
- if (++pmap_alias_index >= PMAP_ALIAS_MAX)
- panic("pmap_enter: exhausted alias log");
- }
- }
- e = e->next;
- }
- }
-#endif /* DEBUG_ALIAS */
/*
- * Add new pv_entry after header.
+ * Add new pv_hashed_entry after header.
*/
- if (pv_e == PV_ENTRY_NULL) {
- PV_ALLOC(pv_e);
- if (pv_e == PV_ENTRY_NULL) {
- panic("pmap no pv_e's");
+ if ((PV_HASHED_ENTRY_NULL == pvh_e) && pvh_new) {
+ pvh_e = pvh_new;
+ pvh_new = PV_HASHED_ENTRY_NULL; /* show we used it */
+ } else if (PV_HASHED_ENTRY_NULL == pvh_e) {
+ PV_HASHED_ALLOC(pvh_e);
+ if (PV_HASHED_ENTRY_NULL == pvh_e) {
+ /* the pv list is empty.
+ * if we are on the kernel pmap we'll use one of the special private
+ * kernel pv_e's, else, we need to unlock everything, zalloc a pv_e,
+ * and restart bringing in the pv_e with us.
+ */
+ if (kernel_pmap == pmap) {
+ PV_HASHED_KERN_ALLOC(pvh_e);
+ } else {
+ UNLOCK_PVH(pai);
+ PMAP_UNLOCK(pmap);
+ pvh_new = (pv_hashed_entry_t) zalloc(pv_hashed_list_zone);
+ goto Retry;
}
+ }
}
- pv_e->va = vaddr;
- pv_e->pmap = pmap;
- pv_e->next = pv_h->next;
- pv_h->next = pv_e;
+
+ if (PV_HASHED_ENTRY_NULL == pvh_e) panic("pvh_e exhaustion");
+ pvh_e->va = vaddr;
+ pvh_e->pmap = pmap;
+ pvh_e->ppn = pn;
+ CHK_NPVHASH();
+ pvhash_idx = pvhashidx(pmap,vaddr);
+ LOCK_PV_HASH(pvhash_idx);
+ insque(&pvh_e->qlink, &pv_h->qlink);
+ hashp = pvhash(pvhash_idx);
+#if PV_DEBUG
+ if(NULL==hashp)panic("pmap_enter 4");
+#endif
+ pvh_e->nexth = *hashp;
+ *hashp = pvh_e;
+ UNLOCK_PV_HASH(pvhash_idx);
+
/*
* Remember that we used the pvlist entry.
*/
- pv_e = PV_ENTRY_NULL;
+ pvh_e = PV_HASHED_ENTRY_NULL;
}
- UNLOCK_PVH(pai);
/*
* only count the mapping
* for 'managed memory'
*/
- pmap->stats.resident_count++;
+ OSAddAtomic(+1, (SInt32 *) &pmap->stats.resident_count);
+ if (pmap->stats.resident_count > pmap->stats.resident_max) {
+ pmap->stats.resident_max = pmap->stats.resident_count;
+ }
}
/*
* Step 3) Enter the mapping.
- */
-
-
- /*
+ *
* Build a template to speed up entering -
* only the pfn changes.
*/
template = pa_to_pte(pa) | INTEL_PTE_VALID;
- if(flags & VM_MEM_NOT_CACHEABLE) {
+ if (flags & VM_MEM_NOT_CACHEABLE) {
if(!(flags & VM_MEM_GUARDED))
template |= INTEL_PTE_PTA;
template |= INTEL_PTE_NCACHE;
if (wired) {
template |= INTEL_PTE_WIRED;
- pmap->stats.wired_count++;
+ OSAddAtomic(+1, (SInt32 *) &pmap->stats.wired_count);
}
pmap_store_pte(pte, template);
+ /* if this was a managed page we delayed unlocking the pv until here
+ * to prevent pmap_page_protect et al from finding it until the pte
+ * has been stored */
+
+ if (managed_page(pai)) {
+ UNLOCK_PVH(pai);
+ }
+
Done:
if (need_tlbflush == TRUE)
PMAP_UPDATE_TLBS(pmap, vaddr, vaddr + PAGE_SIZE);
- if (pv_e != PV_ENTRY_NULL) {
- PV_FREE(pv_e);
+ if (pvh_e != PV_HASHED_ENTRY_NULL) {
+ PV_HASHED_FREE_LIST(pvh_e, pvh_e, 1);
}
- PMAP_READ_UNLOCK(pmap, spl);
+ if (pvh_new != PV_HASHED_ENTRY_NULL) {
+ PV_HASHED_KERN_FREE_LIST(pvh_new, pvh_new, 1);
+ }
+
+ PMAP_UNLOCK(pmap);
+ PMAP_TRACE(PMAP_CODE(PMAP__ENTER) | DBG_FUNC_END, 0, 0, 0, 0, 0);
}
/*
boolean_t wired)
{
register pt_entry_t *pte;
- spl_t spl;
-#if 1
/*
* We must grab the pmap system lock because we may
* change a pte_page queue.
*/
- PMAP_READ_LOCK(map, spl);
+ PMAP_LOCK(map);
if ((pte = pmap_pte(map, vaddr)) == PT_ENTRY_NULL)
panic("pmap_change_wiring: pte missing");
/*
* wiring down mapping
*/
- map->stats.wired_count++;
- pmap_store_pte(pte, *pte | INTEL_PTE_WIRED);
- pte++;
+ OSAddAtomic(+1, (SInt32 *) &map->stats.wired_count);
+ pmap_update_pte(pte, *pte, (*pte | INTEL_PTE_WIRED));
}
else if (!wired && iswired(*pte)) {
/*
* unwiring mapping
*/
assert(map->stats.wired_count >= 1);
- map->stats.wired_count--;
- pmap_store_pte(pte, *pte & ~INTEL_PTE_WIRED);
- pte++;
+ OSAddAtomic(-1, (SInt32 *) &map->stats.wired_count);
+ pmap_update_pte(pte, *pte, (*pte & ~INTEL_PTE_WIRED));
}
- PMAP_READ_UNLOCK(map, spl);
-
-#else
- return;
-#endif
-
+ PMAP_UNLOCK(map);
}
ppnum_t
paddr = (vm_offset_t)0;
ppn = pmap_find_phys(pmap, vaddr);
+
if (ppn) {
paddr = ((vm_offset_t)i386_ptob(ppn)) | (vaddr & INTEL_OFFMASK);
}
if (kernel_pmap == map) panic("expand kernel pml4");
spl = splhigh();
- pml4p = pmap64_pml4(map, vaddr);
- splx(spl);
- if (PML4_ENTRY_NULL == pml4p) panic("pmap_expand_pml4 no pml4p");
+ pml4p = pmap64_pml4(map, vaddr);
+ splx(spl);
+ if (PML4_ENTRY_NULL == pml4p) panic("pmap_expand_pml4 no pml4p");
/*
* Allocate a VM page for the pml4 page
pa = i386_ptob(pn);
i = pml4idx(map, vaddr);
- vm_object_lock(map->pm_obj_pml4);
-#if 0 /* DEBUG */
- if (0 != vm_page_lookup(map->pm_obj_pml4, (vm_object_offset_t)i)) {
- kprintf("pmap_expand_pml4: obj_pml4 not empty, pmap 0x%x pm_obj_pml4 0x%x vaddr 0x%llx i 0x%llx\n",
- map, map->pm_obj_pml4, vaddr, i);
- }
-#endif
- vm_page_insert(m, map->pm_obj_pml4, (vm_object_offset_t)i);
+ /*
+ * Zero the page.
+ */
+ pmap_zero_page(pn);
vm_page_lock_queues();
vm_page_wire(m);
-
- vm_page_unlock_queues();
- vm_object_unlock(map->pm_obj_pml4);
inuse_ptepages_count++;
- map->stats.resident_count++;
- map->stats.wired_count++;
+ vm_page_unlock_queues();
- /*
- * Zero the page.
- */
- pmap_zero_page(pn);
+ /* Take the oject lock (mutex) before the PMAP_LOCK (spinlock) */
+ vm_object_lock(map->pm_obj_pml4);
- PMAP_READ_LOCK(map, spl);
+ PMAP_LOCK(map);
/*
* See if someone else expanded us first
*/
if (pmap64_pdpt(map, vaddr) != PDPT_ENTRY_NULL) {
- PMAP_READ_UNLOCK(map, spl);
- vm_object_lock(map->pm_obj_pml4);
+ PMAP_UNLOCK(map);
+ vm_object_unlock(map->pm_obj_pml4);
+
vm_page_lock_queues();
vm_page_free(m);
inuse_ptepages_count--;
- map->stats.resident_count--;
- map->stats.wired_count--;
-
vm_page_unlock_queues();
- vm_object_unlock(map->pm_obj_pml4);
+
return;
}
+#if 0 /* DEBUG */
+ if (0 != vm_page_lookup(map->pm_obj_pml4, (vm_object_offset_t)i)) {
+ panic("pmap_expand_pml4: obj not empty, pmap %p pm_obj %p vaddr 0x%llx i 0x%llx\n",
+ map, map->pm_obj_pml4, vaddr, i);
+ }
+#endif
+ vm_page_insert(m, map->pm_obj_pml4, (vm_object_offset_t)i);
+ vm_object_unlock(map->pm_obj_pml4);
+
/*
* Set the page directory entry for this page table.
- * If we have allocated more than one hardware page,
- * set several page directory entries.
*/
-
pml4p = pmap64_pml4(map, vaddr); /* refetch under lock */
pmap_store_pte(pml4p, pa_to_pte(pa)
| INTEL_PTE_USER
| INTEL_PTE_WRITE);
- PMAP_READ_UNLOCK(map, spl);
+ PMAP_UNLOCK(map);
return;
if (kernel_pmap == map) panic("expand kernel pdpt");
spl = splhigh();
- while ((pdptp = pmap64_pdpt(map, vaddr)) == PDPT_ENTRY_NULL) {
- splx(spl);
- pmap_expand_pml4(map, vaddr); /* need room for another pdpt entry */
- spl = splhigh();
- }
- splx(spl);
-
+ while ((pdptp = pmap64_pdpt(map, vaddr)) == PDPT_ENTRY_NULL) {
+ splx(spl);
+ pmap_expand_pml4(map, vaddr); /* need room for another pdpt entry */
+ spl = splhigh();
+ }
+ splx(spl);
/*
* Allocate a VM page for the pdpt page
pa = i386_ptob(pn);
i = pdptidx(map, vaddr);
- vm_object_lock(map->pm_obj_pdpt);
-#if 0 /* DEBUG */
- if (0 != vm_page_lookup(map->pm_obj_pdpt, (vm_object_offset_t)i)) {
- kprintf("pmap_expand_pdpt: obj_pdpt not empty, pmap 0x%x pm_obj_pdpt 0x%x vaddr 0x%llx i 0x%llx\n",
- map, map->pm_obj_pdpt, vaddr, i);
- }
-#endif
- vm_page_insert(m, map->pm_obj_pdpt, (vm_object_offset_t)i);
+ /*
+ * Zero the page.
+ */
+ pmap_zero_page(pn);
vm_page_lock_queues();
vm_page_wire(m);
-
- vm_page_unlock_queues();
- vm_object_unlock(map->pm_obj_pdpt);
inuse_ptepages_count++;
- map->stats.resident_count++;
- map->stats.wired_count++;
+ vm_page_unlock_queues();
- /*
- * Zero the page.
- */
- pmap_zero_page(pn);
+ /* Take the oject lock (mutex) before the PMAP_LOCK (spinlock) */
+ vm_object_lock(map->pm_obj_pdpt);
- PMAP_READ_LOCK(map, spl);
+ PMAP_LOCK(map);
/*
* See if someone else expanded us first
*/
if (pmap64_pde(map, vaddr) != PD_ENTRY_NULL) {
- PMAP_READ_UNLOCK(map, spl);
- vm_object_lock(map->pm_obj_pdpt);
+ PMAP_UNLOCK(map);
+ vm_object_unlock(map->pm_obj_pdpt);
+
vm_page_lock_queues();
vm_page_free(m);
inuse_ptepages_count--;
- map->stats.resident_count--;
- map->stats.wired_count--;
-
vm_page_unlock_queues();
- vm_object_unlock(map->pm_obj_pdpt);
+
return;
}
+#if 0 /* DEBUG */
+ if (0 != vm_page_lookup(map->pm_obj_pdpt, (vm_object_offset_t)i)) {
+ panic("pmap_expand_pdpt: obj not empty, pmap %p pm_obj %p vaddr 0x%llx i 0x%llx\n",
+ map, map->pm_obj_pdpt, vaddr, i);
+ }
+#endif
+ vm_page_insert(m, map->pm_obj_pdpt, (vm_object_offset_t)i);
+ vm_object_unlock(map->pm_obj_pdpt);
+
/*
* Set the page directory entry for this page table.
- * If we have allocated more than one hardware page,
- * set several page directory entries.
*/
-
pdptp = pmap64_pdpt(map, vaddr); /* refetch under lock */
pmap_store_pte(pdptp, pa_to_pte(pa)
| INTEL_PTE_USER
| INTEL_PTE_WRITE);
- PMAP_READ_UNLOCK(map, spl);
+ PMAP_UNLOCK(map);
return;
* and we are 64 bit, propagate expand upwards
*/
- if (cpu_64bit && (map != kernel_pmap)) {
- spl = splhigh();
- while ((pdp = pmap64_pde(map, vaddr)) == PD_ENTRY_NULL) {
- splx(spl);
- pmap_expand_pdpt(map, vaddr); /* need room for another pde entry */
- spl = splhigh();
- }
- splx(spl);
- } else {
- pdp = pmap_pde(map, vaddr);
- }
-
+ if (cpu_64bit && (map != kernel_pmap)) {
+ spl = splhigh();
+ while ((pdp = pmap64_pde(map, vaddr)) == PD_ENTRY_NULL) {
+ splx(spl);
+ pmap_expand_pdpt(map, vaddr); /* need room for another pde entry */
+ spl = splhigh();
+ }
+ splx(spl);
+ }
/*
* Allocate a VM page for the pde entries.
pa = i386_ptob(pn);
i = pdeidx(map, vaddr);
- vm_object_lock(map->pm_obj);
-#if 0 /* DEBUG */
- if (0 != vm_page_lookup(map->pm_obj, (vm_object_offset_t)i)) {
- kprintf("pmap_expand: obj not empty, pmap 0x%x pm_obj 0x%x vaddr 0x%llx i 0x%llx\n",
- map, map->pm_obj, vaddr, i);
- }
-#endif
- vm_page_insert(m, map->pm_obj, (vm_object_offset_t)i);
+ /*
+ * Zero the page.
+ */
+ pmap_zero_page(pn);
vm_page_lock_queues();
vm_page_wire(m);
inuse_ptepages_count++;
-
vm_page_unlock_queues();
- vm_object_unlock(map->pm_obj);
- /*
- * Zero the page.
- */
- pmap_zero_page(pn);
+ /* Take the oject lock (mutex) before the PMAP_LOCK (spinlock) */
+ vm_object_lock(map->pm_obj);
- PMAP_READ_LOCK(map, spl);
+ PMAP_LOCK(map);
/*
* See if someone else expanded us first
*/
+
if (pmap_pte(map, vaddr) != PT_ENTRY_NULL) {
- PMAP_READ_UNLOCK(map, spl);
- vm_object_lock(map->pm_obj);
+ PMAP_UNLOCK(map);
+ vm_object_unlock(map->pm_obj);
vm_page_lock_queues();
vm_page_free(m);
inuse_ptepages_count--;
-
vm_page_unlock_queues();
- vm_object_unlock(map->pm_obj);
+
return;
}
- pdp = pmap_pde(map, vaddr); /* refetch while locked */
+#if 0 /* DEBUG */
+ if (0 != vm_page_lookup(map->pm_obj, (vm_object_offset_t)i)) {
+ panic("pmap_expand: obj not empty, pmap 0x%x pm_obj 0x%x vaddr 0x%llx i 0x%llx\n",
+ map, map->pm_obj, vaddr, i);
+ }
+#endif
+ vm_page_insert(m, map->pm_obj, (vm_object_offset_t)i);
+ vm_object_unlock(map->pm_obj);
/*
- * Set the page directory entry for this page table.
- * If we have allocated more than one hardware page,
- * set several page directory entries.
+ * refetch while locked
*/
+ pdp = pmap_pde(map, vaddr);
+
+ /*
+ * Set the page directory entry for this page table.
+ */
pmap_store_pte(pdp, pa_to_pte(pa)
| INTEL_PTE_VALID
| INTEL_PTE_USER
| INTEL_PTE_WRITE);
-
- PMAP_READ_UNLOCK(map, spl);
+ PMAP_UNLOCK(map);
return;
}
cache_flush_page_phys(pa);
}
+
+
+#ifdef CURRENTLY_UNUSED_AND_UNTESTED
+
int collect_ref;
int collect_unref;
register pt_entry_t *pdp, *ptp;
pt_entry_t *eptp;
int wired;
- spl_t spl;
if (p == PMAP_NULL)
return;
/*
* Garbage collect map.
*/
- PMAP_READ_LOCK(p, spl);
+ PMAP_LOCK(p);
for (pdp = (pt_entry_t *)p->dirbase;
pdp < (pt_entry_t *)&p->dirbase[(UMAXPTDI+1)];
*/
pmap_store_pte(pdp, 0x0);
- PMAP_READ_UNLOCK(p, spl);
+ PMAP_UNLOCK(p);
/*
* And free the pte page itself.
register vm_page_t m;
vm_object_lock(p->pm_obj);
+
m = vm_page_lookup(p->pm_obj,(vm_object_offset_t)(pdp - (pt_entry_t *)&p->dirbase[0]));
if (m == VM_PAGE_NULL)
panic("pmap_collect: pte page not in object");
+
vm_page_lock_queues();
vm_page_free(m);
inuse_ptepages_count--;
vm_page_unlock_queues();
+
vm_object_unlock(p->pm_obj);
}
- PMAP_READ_LOCK(p, spl);
+ PMAP_LOCK(p);
}
}
}
}
- PMAP_UPDATE_TLBS(p, VM_MIN_ADDRESS, VM_MAX_ADDRESS);
- PMAP_READ_UNLOCK(p, spl);
+ PMAP_UPDATE_TLBS(p, 0x0, 0xFFFFFFFFFFFFF000ULL);
+ PMAP_UNLOCK(p);
return;
}
+#endif
void
-pmap_copy_page(src, dst)
- ppnum_t src;
- ppnum_t dst;
+pmap_copy_page(ppnum_t src, ppnum_t dst)
{
- bcopy_phys((addr64_t)i386_ptob(src),
- (addr64_t)i386_ptob(dst),
- PAGE_SIZE);
+ bcopy_phys((addr64_t)i386_ptob(src),
+ (addr64_t)i386_ptob(dst),
+ PAGE_SIZE);
}
*/
void
phys_attribute_clear(
- ppnum_t pn,
+ ppnum_t pn,
int bits)
{
- pv_entry_t pv_h;
- register pv_entry_t pv_e;
+ pv_rooted_entry_t pv_h;
+ register pv_hashed_entry_t pv_e;
register pt_entry_t *pte;
int pai;
register pmap_t pmap;
- spl_t spl;
- pmap_paddr_t phys;
+ pmap_intr_assert();
assert(pn != vm_page_fictitious_addr);
- if (!valid_page(pn)) {
+ if (pn == vm_page_guard_addr)
+ return;
+
+ pai = ppn_to_pai(pn);
+
+ if (!managed_page(pai)) {
/*
* Not a managed page.
*/
return;
}
- /*
- * Lock the pmap system first, since we will be changing
- * several pmaps.
- */
+ PMAP_TRACE(PMAP_CODE(PMAP__ATTRIBUTE_CLEAR) | DBG_FUNC_START,
+ (int) pn, bits, 0, 0, 0);
- PMAP_WRITE_LOCK(spl);
- phys = i386_ptob(pn);
- pai = pa_index(phys);
pv_h = pai_to_pvh(pai);
+ LOCK_PVH(pai);
+
/*
* Walk down PV list, clearing all modify or reference bits.
* We do not have to lock the pv_list because we have
/*
* There are some mappings.
*/
- for (pv_e = pv_h; pv_e != PV_ENTRY_NULL; pv_e = pv_e->next) {
+ pv_e = (pv_hashed_entry_t)pv_h;
+
+ do {
pmap = pv_e->pmap;
- /*
- * Lock the pmap to block pmap_extract and similar routines.
- */
- simple_lock(&pmap->lock);
{
- register vm_map_offset_t va;
+ vm_map_offset_t va;
va = pv_e->va;
- pte = pmap_pte(pmap, va);
+ /*
+ * first make sure any processor actively
+ * using this pmap, flushes its TLB state
+ */
+
+ PMAP_UPDATE_TLBS(pmap, va, va + PAGE_SIZE);
-#if 0
/*
- * Consistency checks.
+ * Clear modify and/or reference bits.
*/
- assert(*pte & INTEL_PTE_VALID);
- /* assert(pte_to_phys(*pte) == phys); */
-#endif
- /*
- * Clear modify or reference bits.
- */
+ pte = pmap_pte(pmap, va);
+ pmap_update_pte(pte, *pte, (*pte & ~bits));
- pmap_store_pte(pte, *pte & ~bits);
- pte++;
- PMAP_UPDATE_TLBS(pmap, va, va + PAGE_SIZE);
}
- simple_unlock(&pmap->lock);
- }
- }
+ pv_e = (pv_hashed_entry_t)queue_next(&pv_e->qlink);
+ } while (pv_e != (pv_hashed_entry_t)pv_h);
+ }
pmap_phys_attributes[pai] &= ~bits;
- PMAP_WRITE_UNLOCK(spl);
+ UNLOCK_PVH(pai);
+
+ PMAP_TRACE(PMAP_CODE(PMAP__ATTRIBUTE_CLEAR) | DBG_FUNC_END,
+ 0, 0, 0, 0, 0);
+
}
/*
* Check specified attribute bits.
*/
-boolean_t
+int
phys_attribute_test(
- ppnum_t pn,
+ ppnum_t pn,
int bits)
{
- pv_entry_t pv_h;
- register pv_entry_t pv_e;
+ pv_rooted_entry_t pv_h;
+ register pv_hashed_entry_t pv_e;
register pt_entry_t *pte;
int pai;
register pmap_t pmap;
- spl_t spl;
- pmap_paddr_t phys;
+ int attributes = 0;
+ pmap_intr_assert();
assert(pn != vm_page_fictitious_addr);
- if (!valid_page(pn)) {
+ if (pn == vm_page_guard_addr)
+ return 0;
+
+ pai = ppn_to_pai(pn);
+
+ if (!managed_page(pai)) {
/*
* Not a managed page.
*/
- return (FALSE);
+ return (0);
}
- phys = i386_ptob(pn);
- pai = pa_index(phys);
/*
* super fast check... if bits already collected
* no need to take any locks...
* the lock in case they got pulled in while
* we were waiting for the lock
*/
- if (pmap_phys_attributes[pai] & bits)
- return (TRUE);
+ if ( (pmap_phys_attributes[pai] & bits) == bits)
+ return (bits);
+
pv_h = pai_to_pvh(pai);
- /*
- * Lock the pmap system first, since we will be checking
- * several pmaps.
- */
- PMAP_WRITE_LOCK(spl);
+ LOCK_PVH(pai);
- if (pmap_phys_attributes[pai] & bits) {
- PMAP_WRITE_UNLOCK(spl);
- return (TRUE);
- }
+ attributes = pmap_phys_attributes[pai] & bits;
/*
- * Walk down PV list, checking all mappings.
+ * Walk down PV list, checking the mappings until we
+ * reach the end or we've found the attributes we've asked for
* We do not have to lock the pv_list because we have
* the entire pmap system locked.
*/
/*
* There are some mappings.
*/
- for (pv_e = pv_h; pv_e != PV_ENTRY_NULL; pv_e = pv_e->next) {
+ pv_e = (pv_hashed_entry_t)pv_h;
+ if (attributes != bits) do {
- pmap = pv_e->pmap;
- /*
- * Lock the pmap to block pmap_extract and similar routines.
- */
- simple_lock(&pmap->lock);
+ pmap = pv_e->pmap;
{
- register vm_map_offset_t va;
+ vm_map_offset_t va;
va = pv_e->va;
- pte = pmap_pte(pmap, va);
+ /*
+ * first make sure any processor actively
+ * using this pmap, flushes its TLB state
+ */
+ PMAP_UPDATE_TLBS(pmap, va, va + PAGE_SIZE);
-#if 0
/*
- * Consistency checks.
+ * pick up modify and/or reference bits from this mapping
*/
- assert(*pte & INTEL_PTE_VALID);
- /* assert(pte_to_phys(*pte) == phys); */
-#endif
- }
- /*
- * Check modify or reference bits.
- */
- {
- if (*pte++ & bits) {
- simple_unlock(&pmap->lock);
- PMAP_WRITE_UNLOCK(spl);
- return (TRUE);
- }
+ pte = pmap_pte(pmap, va);
+ attributes |= *pte & bits;
+
}
- simple_unlock(&pmap->lock);
- }
+
+ pv_e = (pv_hashed_entry_t)queue_next(&pv_e->qlink);
+
+ } while ((attributes != bits) && (pv_e != (pv_hashed_entry_t)pv_h));
}
- PMAP_WRITE_UNLOCK(spl);
- return (FALSE);
+
+ UNLOCK_PVH(pai);
+ return (attributes);
}
/*
*/
void
phys_attribute_set(
- ppnum_t pn,
+ ppnum_t pn,
int bits)
{
- int spl;
- pmap_paddr_t phys;
+ int pai;
+ pmap_intr_assert();
assert(pn != vm_page_fictitious_addr);
- if (!valid_page(pn)) {
+ if (pn == vm_page_guard_addr)
+ return;
+
+ pai = ppn_to_pai(pn);
+
+ if (!managed_page(pai)) {
/*
* Not a managed page.
*/
return;
}
- /*
- * Lock the pmap system and set the requested bits in
- * the phys attributes array. Don't need to bother with
- * ptes because the test routine looks here first.
- */
- phys = i386_ptob(pn);
- PMAP_WRITE_LOCK(spl);
- pmap_phys_attributes[pa_index(phys)] |= bits;
- PMAP_WRITE_UNLOCK(spl);
+ LOCK_PVH(pai);
+
+ pmap_phys_attributes[pai] |= bits;
+
+ UNLOCK_PVH(pai);
}
/*
pmap_is_modified(
ppnum_t pn)
{
- return (phys_attribute_test(pn, PHYS_MODIFIED));
+ if (phys_attribute_test(pn, PHYS_MODIFIED))
+ return TRUE;
+
+ return FALSE;
}
/*
pmap_is_referenced(
ppnum_t pn)
{
- return (phys_attribute_test(pn, PHYS_REFERENCED));
+ if (phys_attribute_test(pn, PHYS_REFERENCED))
+ return TRUE;
+
+ return FALSE;
}
/*
unsigned int
pmap_get_refmod(ppnum_t pa)
{
- return ( ((phys_attribute_test(pa, PHYS_MODIFIED))? VM_MEM_MODIFIED : 0)
- | ((phys_attribute_test(pa, PHYS_REFERENCED))? VM_MEM_REFERENCED : 0));
+ int refmod;
+ unsigned int retval = 0;
+
+ refmod = phys_attribute_test(pa, PHYS_MODIFIED | PHYS_REFERENCED);
+
+ if (refmod & PHYS_MODIFIED)
+ retval |= VM_MEM_MODIFIED;
+ if (refmod & PHYS_REFERENCED)
+ retval |= VM_MEM_REFERENCED;
+
+ return (retval);
}
/*
phys_attribute_clear(pa, x86Mask);
}
-/*
- * Set the modify bit on the specified range
- * of this map as requested.
- *
- * This optimization stands only if each time the dirty bit
- * in vm_page_t is tested, it is also tested in the pmap.
- */
-void
-pmap_modify_pages(
- pmap_t map,
- vm_map_offset_t sva,
- vm_map_offset_t eva)
-{
- spl_t spl;
- register pt_entry_t *pde;
- register pt_entry_t *spte, *epte;
- vm_map_offset_t lva;
- vm_map_offset_t orig_sva;
-
- if (map == PMAP_NULL)
- return;
-
- PMAP_READ_LOCK(map, spl);
-
- orig_sva = sva;
- while (sva && sva < eva) {
- lva = (sva + pde_mapped_size) & ~(pde_mapped_size-1);
- if (lva > eva)
- lva = eva;
- pde = pmap_pde(map, sva);
- if (pde && (*pde & INTEL_PTE_VALID)) {
- spte = (pt_entry_t *)pmap_pte(map, (sva & ~(pde_mapped_size-1)));
- if (lva) {
- spte = &spte[ptenum(sva)];
- epte = &spte[intel_btop(lva-sva)];
- } else {
- epte = &spte[intel_btop(pde_mapped_size)];
- spte = &spte[ptenum(sva)];
- }
- while (spte < epte) {
- if (*spte & INTEL_PTE_VALID) {
- pmap_store_pte(spte, *spte
- | INTEL_PTE_MOD
- | INTEL_PTE_WRITE);
- }
- spte++;
- }
- }
- sva = lva;
- pde++;
- }
- PMAP_UPDATE_TLBS(map, orig_sva, eva);
-
- PMAP_READ_UNLOCK(map, spl);
-}
-
-
void
invalidate_icache(__unused vm_offset_t addr,
__unused unsigned cnt,
return;
}
+#if CONFIG_DTRACE
+/*
+ * Constrain DTrace copyin/copyout actions
+ */
+extern kern_return_t dtrace_copyio_preflight(addr64_t);
+extern kern_return_t dtrace_copyio_postflight(addr64_t);
+
+kern_return_t dtrace_copyio_preflight(__unused addr64_t va)
+{
+ thread_t thread = current_thread();
+
+ if (current_map() == kernel_map)
+ return KERN_FAILURE;
+ else if (thread->machine.specFlags & CopyIOActive)
+ return KERN_FAILURE;
+ else
+ return KERN_SUCCESS;
+}
+
+kern_return_t dtrace_copyio_postflight(__unused addr64_t va)
+{
+ return KERN_SUCCESS;
+}
+#endif /* CONFIG_DTRACE */
+
#if MACH_KDB
/* show phys page mappings and attributes */
extern void db_show_page(pmap_paddr_t pa);
+#if 0
void
db_show_page(pmap_paddr_t pa)
{
pv_h = pai_to_pvh(pai);
attr = pmap_phys_attributes[pai];
- printf("phys page %x ", pa);
+ printf("phys page %llx ", pa);
if (attr & PHYS_MODIFIED)
printf("modified, ");
if (attr & PHYS_REFERENCED)
printf(" not mapped\n");
for (; pv_h; pv_h = pv_h->next)
if (pv_h->pmap)
- printf("%x in pmap %x\n", pv_h->va, pv_h->pmap);
+ printf("%llx in pmap %p\n", pv_h->va, pv_h->pmap);
}
+#endif
#endif /* MACH_KDB */
#if MACH_KDB
+#if 0
void db_kvtophys(vm_offset_t);
void db_show_vaddrs(pt_entry_t *);
continue;
}
pdecnt++;
- ptep = (pt_entry_t *) ((*pdep) & ~INTEL_OFFMASK);
+ ptep = (pt_entry_t *) ((unsigned long)(*pdep) & ~INTEL_OFFMASK);
db_printf("dir[%4d]: 0x%x\n", y, *pdep);
for (x = 0; x < NPTEPG; x++, ptep++) {
if (((tmp = *ptep) & INTEL_PTE_VALID) == 0) {
db_printf("total: %d tables, %d page table entries.\n", pdecnt, ptecnt);
}
+#endif
#endif /* MACH_KDB */
#include <mach_vm_debug.h>
phys_page_exists(
ppnum_t pn)
{
- pmap_paddr_t phys;
-
assert(pn != vm_page_fictitious_addr);
if (!pmap_initialized)
return (TRUE);
- phys = (pmap_paddr_t) i386_ptob(pn);
- if (!pmap_valid_page(pn))
+
+ if (pn == vm_page_guard_addr)
+ return FALSE;
+
+ if (!managed_page(ppn_to_pai(pn)))
return (FALSE);
return TRUE;
}
void
-mapping_free_prime()
+mapping_free_prime(void)
{
int i;
- pv_entry_t pv_e;
+ pv_hashed_entry_t pvh_e;
+ pv_hashed_entry_t pvh_eh;
+ pv_hashed_entry_t pvh_et;
+ int pv_cnt;
+
+ pv_cnt = 0;
+ pvh_eh = pvh_et = PV_HASHED_ENTRY_NULL;
+ for (i = 0; i < (5 * PV_HASHED_ALLOC_CHUNK); i++) {
+ pvh_e = (pv_hashed_entry_t) zalloc(pv_hashed_list_zone);
+
+ pvh_e->qlink.next = (queue_entry_t)pvh_eh;
+ pvh_eh = pvh_e;
+
+ if (pvh_et == PV_HASHED_ENTRY_NULL)
+ pvh_et = pvh_e;
+ pv_cnt++;
+ }
+ PV_HASHED_FREE_LIST(pvh_eh, pvh_et, pv_cnt);
- for (i = 0; i < (5 * PV_ALLOC_CHUNK); i++) {
- pv_e = (pv_entry_t) zalloc(pv_list_zone);
- PV_FREE(pv_e);
+ pv_cnt = 0;
+ pvh_eh = pvh_et = PV_HASHED_ENTRY_NULL;
+ for (i = 0; i < PV_HASHED_KERN_ALLOC_CHUNK; i++) {
+ pvh_e = (pv_hashed_entry_t) zalloc(pv_hashed_list_zone);
+
+ pvh_e->qlink.next = (queue_entry_t)pvh_eh;
+ pvh_eh = pvh_e;
+
+ if (pvh_et == PV_HASHED_ENTRY_NULL)
+ pvh_et = pvh_e;
+ pv_cnt++;
}
+ PV_HASHED_KERN_FREE_LIST(pvh_eh, pvh_et, pv_cnt);
+
}
void
-mapping_adjust()
+mapping_adjust(void)
{
- pv_entry_t pv_e;
+ pv_hashed_entry_t pvh_e;
+ pv_hashed_entry_t pvh_eh;
+ pv_hashed_entry_t pvh_et;
+ int pv_cnt;
int i;
- int spl;
if (mapping_adjust_call == NULL) {
thread_call_setup(&mapping_adjust_call_data,
(thread_call_param_t) NULL);
mapping_adjust_call = &mapping_adjust_call_data;
}
- /* XXX rethink best way to do locking here */
- if (pv_free_count < PV_LOW_WATER_MARK) {
- for (i = 0; i < PV_ALLOC_CHUNK; i++) {
- pv_e = (pv_entry_t) zalloc(pv_list_zone);
- SPLVM(spl);
- PV_FREE(pv_e);
- SPLX(spl);
+
+ pv_cnt = 0;
+ pvh_eh = pvh_et = PV_HASHED_ENTRY_NULL;
+ if (pv_hashed_kern_free_count < PV_HASHED_KERN_LOW_WATER_MARK) {
+ for (i = 0; i < PV_HASHED_KERN_ALLOC_CHUNK; i++) {
+ pvh_e = (pv_hashed_entry_t) zalloc(pv_hashed_list_zone);
+
+ pvh_e->qlink.next = (queue_entry_t)pvh_eh;
+ pvh_eh = pvh_e;
+
+ if (pvh_et == PV_HASHED_ENTRY_NULL)
+ pvh_et = pvh_e;
+ pv_cnt++;
+ }
+ PV_HASHED_KERN_FREE_LIST(pvh_eh, pvh_et, pv_cnt);
+ }
+
+ pv_cnt = 0;
+ pvh_eh = pvh_et = PV_HASHED_ENTRY_NULL;
+ if (pv_hashed_free_count < PV_HASHED_LOW_WATER_MARK) {
+ for (i = 0; i < PV_HASHED_ALLOC_CHUNK; i++) {
+ pvh_e = (pv_hashed_entry_t) zalloc(pv_hashed_list_zone);
+
+ pvh_e->qlink.next = (queue_entry_t)pvh_eh;
+ pvh_eh = pvh_e;
+
+ if (pvh_et == PV_HASHED_ENTRY_NULL)
+ pvh_et = pvh_e;
+ pv_cnt++;
}
+ PV_HASHED_FREE_LIST(pvh_eh, pvh_et, pv_cnt);
}
mappingrecurse = 0;
}
void
pmap_commpage32_init(vm_offset_t kernel_commpage, vm_offset_t user_commpage, int cnt)
{
- int i;
- pt_entry_t *opte, *npte;
- pt_entry_t pte;
-
-
- for (i = 0; i < cnt; i++) {
- opte = pmap_pte(kernel_pmap, (vm_map_offset_t)kernel_commpage);
- if (0 == opte) panic("kernel_commpage");
- pte = *opte | INTEL_PTE_USER|INTEL_PTE_GLOBAL;
- pte &= ~INTEL_PTE_WRITE; // ensure read only
- npte = pmap_pte(kernel_pmap, (vm_map_offset_t)user_commpage);
- if (0 == npte) panic("user_commpage");
- pmap_store_pte(npte, pte);
- kernel_commpage += INTEL_PGBYTES;
- user_commpage += INTEL_PGBYTES;
- }
+ int i;
+ pt_entry_t *opte, *npte;
+ pt_entry_t pte;
+ spl_t s;
+
+ for (i = 0; i < cnt; i++) {
+ s = splhigh();
+ opte = pmap_pte(kernel_pmap, (vm_map_offset_t)kernel_commpage);
+ if (0 == opte)
+ panic("kernel_commpage");
+ pte = *opte | INTEL_PTE_USER|INTEL_PTE_GLOBAL;
+ pte &= ~INTEL_PTE_WRITE; // ensure read only
+ npte = pmap_pte(kernel_pmap, (vm_map_offset_t)user_commpage);
+ if (0 == npte)
+ panic("user_commpage");
+ pmap_store_pte(npte, pte);
+ splx(s);
+ kernel_commpage += INTEL_PGBYTES;
+ user_commpage += INTEL_PGBYTES;
+ }
}
+
#define PMAP_COMMPAGE64_CNT (_COMM_PAGE64_AREA_USED/PAGE_SIZE)
pt_entry_t pmap_commpage64_ptes[PMAP_COMMPAGE64_CNT];
void
pmap_commpage64_init(vm_offset_t kernel_commpage, __unused vm_map_offset_t user_commpage, int cnt)
{
- spl_t s;
- int i;
- pt_entry_t *kptep;
-
- s = splhigh();
- for (i = 0; i< cnt; i++) {
- kptep = pmap_pte(kernel_pmap, (uint64_t)kernel_commpage + (i*PAGE_SIZE));
- if ((0 == kptep) || (0 == (*kptep & INTEL_PTE_VALID))) panic("pmap_commpage64_init pte");
- pmap_commpage64_ptes[i] = ((*kptep & ~INTEL_PTE_WRITE) | INTEL_PTE_USER);
- }
- splx(s);
-
-}
-
-void
-pmap_map_sharedpage(__unused task_t task, pmap_t p)
-{
- pt_entry_t *ptep;
- spl_t s;
- int i;
-
- if (!p->pm_64bit) return;
- /* setup high 64 bit commpage */
- s = splhigh();
- while ((ptep = pmap_pte(p, (uint64_t)_COMM_PAGE64_BASE_ADDRESS)) == PD_ENTRY_NULL) {
- splx(s);
- pmap_expand(p, (uint64_t)_COMM_PAGE64_BASE_ADDRESS);
- s = splhigh();
- }
+ int i;
+ pt_entry_t *kptep;
- for (i = 0; i< PMAP_COMMPAGE64_CNT; i++) {
- ptep = pmap_pte(p, (uint64_t)_COMM_PAGE64_BASE_ADDRESS + (i*PAGE_SIZE));
- if (0 == ptep) panic("pmap_map_sharedpage");
- pmap_store_pte(ptep, pmap_commpage64_ptes[i]);
- }
- splx(s);
+ PMAP_LOCK(kernel_pmap);
+ for (i = 0; i < cnt; i++) {
+ kptep = pmap_pte(kernel_pmap, (uint64_t)kernel_commpage + (i*PAGE_SIZE));
+ if ((0 == kptep) || (0 == (*kptep & INTEL_PTE_VALID)))
+ panic("pmap_commpage64_init pte");
+ pmap_commpage64_ptes[i] = ((*kptep & ~INTEL_PTE_WRITE) | INTEL_PTE_USER);
+ }
+ PMAP_UNLOCK(kernel_pmap);
}
-void
-pmap_unmap_sharedpage(pmap_t pmap)
-{
- spl_t s;
- pt_entry_t *ptep;
- int i;
-
- if (!pmap->pm_64bit) return;
- s = splhigh();
- for (i = 0; i< PMAP_COMMPAGE64_CNT; i++) {
- ptep = pmap_pte(pmap, (uint64_t)_COMM_PAGE64_BASE_ADDRESS + (i*PAGE_SIZE));
- if (ptep) pmap_store_pte(ptep, 0);
- }
- splx(s);
-}
static cpu_pmap_t cpu_pmap_master;
address = (vm_offset_t)mapaddr;
for (i = 0; i < PMAP_NWINDOWS; i++, address += PAGE_SIZE) {
+ spl_t s;
+ s = splhigh();
while ((pte = pmap_pte(kernel_pmap, (vm_map_offset_t)address)) == 0)
pmap_expand(kernel_pmap, (vm_map_offset_t)address);
* (int *) pte = 0;
cp->mapwindow[i].prv_CADDR = (caddr_t) address;
cp->mapwindow[i].prv_CMAP = pte;
+ splx(s);
}
vm_map_unlock(kernel_map);
}
{
mapwindow_t *mp;
int i;
- boolean_t istate;
- /*
- * can be called from hardware interrupt context
- * so we need to protect the lookup process
- */
- istate = ml_set_interrupts_enabled(FALSE);
+ assert(ml_get_interrupts_enabled() == 0 || get_preemption_level() != 0);
/*
* Note: 0th map reserved for pmap_pte()
mp = ¤t_cpu_datap()->cpu_pmap->mapwindow[i];
if (*mp->prv_CMAP == 0) {
- *mp->prv_CMAP = pentry;
- break;
+ pmap_store_pte(mp->prv_CMAP, pentry);
+
+ invlpg((uintptr_t)mp->prv_CADDR);
+
+ return (mp);
}
}
- if (i >= PMAP_NWINDOWS)
- mp = NULL;
- (void) ml_set_interrupts_enabled(istate);
-
- return (mp);
+ panic("pmap_get_mapwindow: no windows available");
+
+ return NULL;
+}
+
+
+void
+pmap_put_mapwindow(mapwindow_t *mp)
+{
+ pmap_store_pte(mp->prv_CMAP, 0);
}
+/*
+ * The Intel platform can nest at the PDE level, so NBPDE (i.e. 2MB) at a time,
+ * on a NBPDE boundary.
+ */
+uint64_t pmap_nesting_size_min = NBPDE;
+uint64_t pmap_nesting_size_max = 0 - (uint64_t)NBPDE; /* no limit, really... */
+
/*
* kern_return_t pmap_nest(grand, subord, vstart, size)
*
vm_map_offset_t vaddr, nvaddr;
pd_entry_t *pde,*npde;
- unsigned int i, need_flush;
- unsigned int num_pde;
- spl_t s;
+ unsigned int i;
+ uint64_t num_pde;
// do validity tests
-
- if(size & 0x0FFFFFFFULL) return KERN_INVALID_VALUE; /* We can only do this for multiples of 256MB */
+ if (size & (pmap_nesting_size_min-1)) return KERN_INVALID_VALUE;
+ if(vstart & (pmap_nesting_size_min-1)) return KERN_INVALID_VALUE;
+ if(nstart & (pmap_nesting_size_min-1)) return KERN_INVALID_VALUE;
if((size >> 28) > 65536) return KERN_INVALID_VALUE; /* Max size we can nest is 16TB */
- if(vstart & 0x0FFFFFFFULL) return KERN_INVALID_VALUE; /* We can only do this aligned to 256MB */
- if(nstart & 0x0FFFFFFFULL) return KERN_INVALID_VALUE; /* We can only do this aligned to 256MB */
- if(size == 0) {
+ if(size == 0) {
panic("pmap_nest: size is invalid - %016llX\n", size);
}
- if ((size >> 28) != 1) panic("pmap_nest: size 0x%llx must be 0x%x", size, NBPDE);
-
- subord->pm_shared = TRUE;
- // prepopulate subord pmap pde's if necessary
+ PMAP_TRACE(PMAP_CODE(PMAP__NEST) | DBG_FUNC_START,
+ (int) grand, (int) subord,
+ (int) (vstart>>32), (int) vstart, 0);
- if (cpu_64bit) {
- s = splhigh();
- while (PD_ENTRY_NULL == (npde = pmap_pde(subord, nstart))) {
- splx(s);
- pmap_expand(subord, nstart);
- s = splhigh();
- }
- splx(s);
- }
-
- PMAP_READ_LOCK(subord,s);
+ subord->pm_shared = TRUE;
nvaddr = (vm_map_offset_t)nstart;
- need_flush = 0;
num_pde = size >> PDESHIFT;
- for (i=0;i<num_pde;i++) {
+ PMAP_LOCK(subord);
+ for (i = 0; i < num_pde; i++) {
npde = pmap_pde(subord, nvaddr);
- if ((0 == npde) || (*npde++ & INTEL_PTE_VALID) == 0) {
- PMAP_READ_UNLOCK(subord,s);
+ while (0 == npde || ((*npde & INTEL_PTE_VALID) == 0)) {
+ PMAP_UNLOCK(subord);
pmap_expand(subord, nvaddr); // pmap_expand handles races
- PMAP_READ_LOCK(subord,s);
- need_flush++;
+ PMAP_LOCK(subord);
+ npde = pmap_pde(subord, nvaddr);
}
nvaddr += NBPDE;
}
- if (need_flush) {
- nvaddr = (vm_map_offset_t)nstart;
- PMAP_UPDATE_TLBS(subord, nvaddr, nvaddr + (1 << 28) -1 );
- }
- PMAP_READ_UNLOCK(subord,s);
+ PMAP_UNLOCK(subord);
- // copy pde's from subord pmap into grand pmap
+ vaddr = (vm_map_offset_t)vstart;
- if (cpu_64bit) {
- s = splhigh();
- while (PD_ENTRY_NULL == (pde = pmap_pde(grand, vstart))) {
- splx(s);
- pmap_expand(grand, vstart);
- s = splhigh();
- }
- splx(s);
- }
+ PMAP_LOCK(grand);
- PMAP_READ_LOCK(grand,s);
- vaddr = (vm_map_offset_t)vstart;
- for (i=0;i<num_pde;i++,pde++) {
+ for (i = 0;i < num_pde; i++) {
pd_entry_t tpde;
+
npde = pmap_pde(subord, nstart);
- if (npde == 0) panic("pmap_nest: no npde, subord 0x%x nstart 0x%llx", subord, nstart);
+ if (npde == 0)
+ panic("pmap_nest: no npde, subord %p nstart 0x%llx", subord, nstart);
tpde = *npde;
nstart += NBPDE;
pde = pmap_pde(grand, vaddr);
- if (pde == 0) panic("pmap_nest: no pde, grand 0x%x vaddr 0x%llx", grand, vaddr);
+/* Legacy mode does not require expansion.
+ * DRK: consider a debug mode test to verify that no PTEs are extant within
+ * this range.
+ */
+ if ((0 == pde) && cpu_64bit) {
+ PMAP_UNLOCK(grand);
+ pmap_expand_pdpt(grand, vaddr);
+ PMAP_LOCK(grand);
+ pde = pmap_pde(grand, vaddr);
+ }
+
+ if (pde == 0)
+ panic("pmap_nest: no pde, grand %p vaddr 0x%llx", grand, vaddr);
vaddr += NBPDE;
pmap_store_pte(pde, tpde);
}
- PMAP_UPDATE_TLBS(grand, vaddr, vaddr + (1 << 28) -1 );
- PMAP_READ_UNLOCK(grand,s);
+ /* XXX FBDP: why do we need to flush here ? */
+ PMAP_UPDATE_TLBS(grand, vstart, vstart + size - 1);
+
+ PMAP_UNLOCK(grand);
+
+ PMAP_TRACE(PMAP_CODE(PMAP__NEST) | DBG_FUNC_END, 0, 0, 0, 0, 0);
return KERN_SUCCESS;
}
* segment sized ranges.
*/
-kern_return_t pmap_unnest(pmap_t grand, addr64_t vaddr) {
+kern_return_t pmap_unnest(pmap_t grand, addr64_t vaddr, uint64_t size) {
- spl_t s;
pd_entry_t *pde;
unsigned int i;
unsigned int num_pde;
+ addr64_t vstart, vend;
+
+ PMAP_TRACE(PMAP_CODE(PMAP__NEST) | DBG_FUNC_START,
+ (int) grand,
+ (int) (vaddr>>32), (int) vaddr, 0, 0);
- PMAP_READ_LOCK(grand,s);
+ if ((size & (pmap_nesting_size_min-1)) ||
+ (vaddr & (pmap_nesting_size_min-1))) {
+ panic("pmap_unnest(%p,0x%llx,0x%llx): unaligned...\n",
+ grand, vaddr, size);
+ }
+
+ /* align everything to PDE boundaries */
+ vstart = vaddr & ~(NBPDE-1);
+ vend = (vaddr + size + NBPDE - 1) & ~(NBPDE-1);
+ size = vend - vstart;
+
+ PMAP_LOCK(grand);
// invalidate all pdes for segment at vaddr in pmap grand
- num_pde = (1<<28) >> PDESHIFT;
+ num_pde = size >> PDESHIFT;
+ vaddr = vstart;
for (i=0;i<num_pde;i++,pde++) {
pde = pmap_pde(grand, (vm_map_offset_t)vaddr);
- if (pde == 0) panic("pmap_unnest: no pde, grand 0x%x vaddr 0x%llx\n", grand, vaddr);
+ if (pde == 0) panic("pmap_unnest: no pde, grand %p vaddr 0x%llx\n", grand, vaddr);
pmap_store_pte(pde, (pd_entry_t)0);
vaddr += NBPDE;
}
- PMAP_UPDATE_TLBS(grand, vaddr, vaddr + (1<<28) -1 );
+ PMAP_UPDATE_TLBS(grand, vstart, vend);
- PMAP_READ_UNLOCK(grand,s);
+ PMAP_UNLOCK(grand);
- return KERN_SUCCESS; /* Bye, bye, butterfly... */
+ PMAP_TRACE(PMAP_CODE(PMAP__NEST) | DBG_FUNC_END, 0, 0, 0, 0, 0);
+
+ return KERN_SUCCESS;
}
void
a = e + HIGH_CPU_END * cpu_number();
vaddr = (vm_offset_t)pmap_index_to_virt(HIGH_FIXED_CPUS_BEGIN + a);
- *(pte_unique_base + a) = pte;
+ pmap_store_pte(pte_unique_base + a, pte);
/* TLB flush for this page for this cpu */
invlpg((uintptr_t)vaddr);
boolean_t flush_self = FALSE;
uint64_t deadline;
- assert(!ml_get_interrupts_enabled());
+ assert((processor_avail_count < 2) ||
+ (ml_get_interrupts_enabled() && get_preemption_level() != 0));
/*
* Scan other cpus for matching active or task CR3.
for (cpu = 0, cpu_bit = 1; cpu < real_ncpus; cpu++, cpu_bit <<= 1) {
if (!cpu_datap(cpu)->cpu_running)
continue;
- if ((cpu_datap(cpu)->cpu_task_cr3 == pmap_cr3) ||
- (CPU_GET_ACTIVE_CR3(cpu) == pmap_cr3) ||
+ if ((cpu_datap(cpu)->cpu_task_cr3 == pmap_cr3) ||
+ (CPU_GET_ACTIVE_CR3(cpu) == pmap_cr3) ||
(pmap->pm_shared) ||
((pmap == kernel_pmap) &&
(!CPU_CR3_IS_ACTIVE(cpu) ||
}
}
- if (cpus_to_signal) {
- KERNEL_DEBUG(0xef800024 | DBG_FUNC_START, cpus_to_signal, 0, 0, 0, 0);
+ PMAP_TRACE(PMAP_CODE(PMAP__FLUSH_TLBS) | DBG_FUNC_START,
+ (int) pmap, cpus_to_signal, flush_self, 0, 0);
+ if (cpus_to_signal) {
deadline = mach_absolute_time() + LockTimeOut;
/*
* Wait for those other cpus to acknowledge
cpus_to_signal &= ~cpu_bit;
break;
}
- if (mach_absolute_time() > deadline)
- panic("pmap_flush_tlbs() "
- "timeout pmap=%p cpus_to_signal=%p",
- pmap, cpus_to_signal);
+ if (mach_absolute_time() > deadline) {
+ force_immediate_debugger_NMI = TRUE;
+ panic("pmap_flush_tlbs() timeout: "
+ "cpu %d failing to respond to interrupts, pmap=%p cpus_to_signal=%lx",
+ cpu, pmap, cpus_to_signal);
+ }
cpu_pause();
}
if (cpus_to_signal == 0)
break;
}
- KERNEL_DEBUG(0xef800024 | DBG_FUNC_END, cpus_to_signal, 0, 0, 0, 0);
}
/*
if (flush_self)
flush_tlb();
+
+ PMAP_TRACE(PMAP_CODE(PMAP__FLUSH_TLBS) | DBG_FUNC_END,
+ (int) pmap, cpus_to_signal, flush_self, 0, 0);
}
void
process_pmap_updates(void)
{
+ assert(ml_get_interrupts_enabled() == 0 || get_preemption_level() != 0);
+
flush_tlb();
current_cpu_datap()->cpu_tlb_invalid = FALSE;
void
pmap_update_interrupt(void)
{
- KERNEL_DEBUG(0xef800028 | DBG_FUNC_START, 0, 0, 0, 0, 0);
-
- assert(!ml_get_interrupts_enabled());
+ PMAP_TRACE(PMAP_CODE(PMAP__UPDATE_INTERRUPT) | DBG_FUNC_START,
+ 0, 0, 0, 0, 0);
process_pmap_updates();
- KERNEL_DEBUG(0xef800028 | DBG_FUNC_END, 0, 0, 0, 0, 0);
+ PMAP_TRACE(PMAP_CODE(PMAP__UPDATE_INTERRUPT) | DBG_FUNC_END,
+ 0, 0, 0, 0, 0);
}
unsigned int pmap_cache_attributes(ppnum_t pn) {
- if (!pmap_valid_page(pn))
+ if (!managed_page(ppn_to_pai(pn)))
return (VM_WIMG_IO);
return (VM_WIMG_COPYBACK);
projects / apple / xnu.git / blobdiff