/*
- * Copyright (c) 2003 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2003-2010 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
/*
* Here's what to do if you want to add a new routine to the comm page:
*
- * 1. Add a definition for it's address in osfmk/ppc/cpu_capabilities.h,
+ * 1. Add a definition for it's address in osfmk/i386/cpu_capabilities.h,
* being careful to reserve room for future expansion.
*
* 2. Write one or more versions of the routine, each with it's own
* commpage_descriptor. The tricky part is getting the "special",
* "musthave", and "canthave" fields right, so that exactly one
* version of the routine is selected for every machine.
- * The source files should be in osfmk/ppc/commpage/.
+ * The source files should be in osfmk/i386/commpage/.
*
* 3. Add a ptr to your new commpage_descriptor(s) in the "routines"
- * array in commpage_populate(). Of course, you'll also have to
- * declare them "extern" in commpage_populate().
+ * array in osfmk/i386/commpage/commpage_asm.s. There are two
+ * arrays, one for the 32-bit and one for the 64-bit commpage.
*
* 4. Write the code in Libc to use the new routine.
*/
#include <mach/mach_types.h>
#include <mach/machine.h>
#include <mach/vm_map.h>
+#include <mach/mach_vm.h>
+#include <mach/machine.h>
+#include <i386/cpuid.h>
+#include <i386/tsc.h>
+#include <i386/rtclock_protos.h>
+#include <i386/cpu_data.h>
#include <i386/machine_routines.h>
+#include <i386/misc_protos.h>
+#include <i386/cpuid.h>
#include <machine/cpu_capabilities.h>
#include <machine/commpage.h>
#include <machine/pmap.h>
#include <vm/vm_kern.h>
#include <vm/vm_map.h>
+
#include <ipc/ipc_port.h>
+#include <kern/page_decrypt.h>
+#include <kern/processor.h>
+
+/* the lists of commpage routines are in commpage_asm.s */
+extern commpage_descriptor* commpage_32_routines[];
+extern commpage_descriptor* commpage_64_routines[];
+
+extern vm_map_t commpage32_map; // the shared submap, set up in vm init
+extern vm_map_t commpage64_map; // the shared submap, set up in vm init
-extern vm_map_t com_region_map32; // the shared submap, set up in vm init
+char *commPagePtr32 = NULL; // virtual addr in kernel map of 32-bit commpage
+char *commPagePtr64 = NULL; // ...and of 64-bit commpage
+uint32_t _cpu_capabilities = 0; // define the capability vector
-static uintptr_t next = 0; // next available byte in comm page
-static int cur_routine = 0; // comm page address of "current" routine
-static int matched; // true if we've found a match for "current" routine
+int noVMX = 0; /* if true, do not set kHasAltivec in ppc _cpu_capabilities */
-int _cpu_capabilities = 0; // define the capability vector
+typedef uint32_t commpage_address_t;
-char *commPagePtr = NULL; // virtual address of comm page in kernel map
+static commpage_address_t next; // next available address in comm page
+static commpage_address_t cur_routine; // comm page address of "current" routine
+static boolean_t matched; // true if we've found a match for "current" routine
+
+static char *commPagePtr; // virtual addr in kernel map of commpage we are working on
+static commpage_address_t commPageBaseOffset; // subtract from 32-bit runtime address to get offset in virtual commpage in kernel map
+
+static commpage_time_data *time_data32 = NULL;
+static commpage_time_data *time_data64 = NULL;
+
+decl_simple_lock_data(static,commpage_active_cpus_lock);
/* Allocate the commpage and add to the shared submap created by vm:
* 1. allocate a page in the kernel map (RW)
*/
static void*
-commpage_allocate( void )
+commpage_allocate(
+ vm_map_t submap, // commpage32_map or commpage_map64
+ size_t area_used ) // _COMM_PAGE32_AREA_USED or _COMM_PAGE64_AREA_USED
{
- vm_offset_t kernel_addr; // address of commpage in kernel map
- vm_offset_t zero = 0;
- vm_size_t size = _COMM_PAGE_AREA_LENGTH;
- vm_map_entry_t entry;
- ipc_port_t handle;
-
- if (com_region_map32 == NULL)
- panic("commpage map is null");
-
- if (vm_allocate(kernel_map,&kernel_addr,_COMM_PAGE_AREA_LENGTH,VM_FLAGS_ANYWHERE))
- panic("cannot allocate commpage");
-
- if (vm_map_wire(kernel_map,kernel_addr,kernel_addr+_COMM_PAGE_AREA_LENGTH,VM_PROT_DEFAULT,FALSE))
- panic("cannot wire commpage");
-
- /*
- * Now that the object is created and wired into the kernel map, mark it so that no delay
- * copy-on-write will ever be performed on it as a result of mapping it into user-space.
- * If such a delayed copy ever occurred, we could remove the kernel's wired mapping - and
- * that would be a real disaster.
- *
- * JMM - What we really need is a way to create it like this in the first place.
- */
- if (!vm_map_lookup_entry( kernel_map, vm_map_trunc_page(kernel_addr), &entry) || entry->is_sub_map)
- panic("cannot find commpage entry");
- entry->object.vm_object->copy_strategy = MEMORY_OBJECT_COPY_NONE;
-
- if (mach_make_memory_entry( kernel_map, // target map
- &size, // size
- kernel_addr, // offset (address in kernel map)
- VM_PROT_DEFAULT, // map it RW
- &handle, // this is the object handle we get
- NULL )) // parent_entry (what is this?)
- panic("cannot make entry for commpage");
-
- if (vm_map_64( com_region_map32, // target map (shared submap)
- &zero, // address (map into 1st page in submap)
- _COMM_PAGE_AREA_LENGTH, // size
- 0, // mask
- VM_FLAGS_FIXED, // flags (it must be 1st page in submap)
- handle, // port is the memory entry we just made
- 0, // offset (map 1st page in memory entry)
- FALSE, // copy
- VM_PROT_READ, // cur_protection (R-only in user map)
- VM_PROT_READ, // max_protection
- VM_INHERIT_SHARE )) // inheritance
- panic("cannot map commpage");
-
- ipc_port_release(handle);
-
- return (void*) kernel_addr; // return address in kernel map
+ vm_offset_t kernel_addr = 0; // address of commpage in kernel map
+ vm_offset_t zero = 0;
+ vm_size_t size = area_used; // size actually populated
+ vm_map_entry_t entry;
+ ipc_port_t handle;
+
+ if (submap == NULL)
+ panic("commpage submap is null");
+
+ if (vm_map(kernel_map,&kernel_addr,area_used,0,VM_FLAGS_ANYWHERE,NULL,0,FALSE,VM_PROT_ALL,VM_PROT_ALL,VM_INHERIT_NONE))
+ panic("cannot allocate commpage");
+
+ if (vm_map_wire(kernel_map,kernel_addr,kernel_addr+area_used,VM_PROT_DEFAULT,FALSE))
+ panic("cannot wire commpage");
+
+ /*
+ * Now that the object is created and wired into the kernel map, mark it so that no delay
+ * copy-on-write will ever be performed on it as a result of mapping it into user-space.
+ * If such a delayed copy ever occurred, we could remove the kernel's wired mapping - and
+ * that would be a real disaster.
+ *
+ * JMM - What we really need is a way to create it like this in the first place.
+ */
+ if (!vm_map_lookup_entry( kernel_map, vm_map_trunc_page(kernel_addr), &entry) || entry->is_sub_map)
+ panic("cannot find commpage entry");
+ entry->object.vm_object->copy_strategy = MEMORY_OBJECT_COPY_NONE;
+
+ if (mach_make_memory_entry( kernel_map, // target map
+ &size, // size
+ kernel_addr, // offset (address in kernel map)
+ VM_PROT_ALL, // map it RWX
+ &handle, // this is the object handle we get
+ NULL )) // parent_entry (what is this?)
+ panic("cannot make entry for commpage");
+
+ if (vm_map_64( submap, // target map (shared submap)
+ &zero, // address (map into 1st page in submap)
+ area_used, // size
+ 0, // mask
+ VM_FLAGS_FIXED, // flags (it must be 1st page in submap)
+ handle, // port is the memory entry we just made
+ 0, // offset (map 1st page in memory entry)
+ FALSE, // copy
+ VM_PROT_READ|VM_PROT_EXECUTE, // cur_protection (R-only in user map)
+ VM_PROT_READ|VM_PROT_EXECUTE, // max_protection
+ VM_INHERIT_SHARE )) // inheritance
+ panic("cannot map commpage");
+
+ ipc_port_release(handle);
+
+ // Initialize the text section of the commpage with INT3
+ char *commpage_ptr = (char*)(intptr_t)kernel_addr;
+ vm_size_t i;
+ for( i = _COMM_PAGE_TEXT_START - _COMM_PAGE_START_ADDRESS; i < size; i++ )
+ // This is the hex for the X86 opcode INT3
+ commpage_ptr[i] = 0xCC;
+
+ return (void*)(intptr_t)kernel_addr; // return address in kernel map
}
/* Get address (in kernel map) of a commpage field. */
static void*
commpage_addr_of(
- int addr_at_runtime )
+ commpage_address_t addr_at_runtime )
{
- return (void*) ((uintptr_t)commPagePtr + addr_at_runtime - _COMM_PAGE_BASE_ADDRESS);
+ return (void*) ((uintptr_t)commPagePtr + (addr_at_runtime - commPageBaseOffset));
}
/* Determine number of CPUs on this system. We cannot rely on
static void
commpage_init_cpu_capabilities( void )
{
- int bits;
+ uint32_t bits;
int cpus;
ml_cpu_info_t cpu_info;
ml_cpu_get_info(&cpu_info);
switch (cpu_info.vector_unit) {
+ case 9:
+ bits |= kHasAVX1_0;
+ /* fall thru */
+ case 8:
+ bits |= kHasSSE4_2;
+ /* fall thru */
+ case 7:
+ bits |= kHasSSE4_1;
+ /* fall thru */
+ case 6:
+ bits |= kHasSupplementalSSE3;
+ /* fall thru */
case 5:
bits |= kHasSSE3;
/* fall thru */
bits |= kFastThreadLocalStorage; // we use %gs for TLS
+ if (cpu_mode_is64bit()) // k64Bit means processor is 64-bit capable
+ bits |= k64Bit;
+
+ if (tscFreq <= SLOW_TSC_THRESHOLD) /* is TSC too slow for _commpage_nanotime? */
+ bits |= kSlow;
+
+ if (cpuid_features() & CPUID_FEATURE_AES)
+ bits |= kHasAES;
+
_cpu_capabilities = bits; // set kernel version for use by drivers etc
}
+int
+_get_cpu_capabilities(void)
+{
+ return _cpu_capabilities;
+}
+
/* Copy data into commpage. */
static void
commpage_stuff(
- int address,
- void *source,
+ commpage_address_t address,
+ const void *source,
int length )
{
void *dest = commpage_addr_of(address);
- if ((uintptr_t)dest < next)
- panic("commpage overlap at address 0x%x, 0x%x < 0x%x", address, dest, next);
+ if (address < next)
+ panic("commpage overlap at address 0x%p, 0x%x < 0x%x", dest, address, next);
bcopy(source,dest,length);
- next = ((uintptr_t)dest + length);
-}
-
-
-static void
-commpage_stuff2(
- int address,
- void *source,
- int length )
-{
- commpage_stuff(address, source, length);
+ next = address + length;
}
/* Copy a routine into comm page if it matches running machine.
commpage_stuff_routine(
commpage_descriptor *rd )
{
- int must,cant;
+ uint32_t must,cant;
if (rd->commpage_address != cur_routine) {
if ((cur_routine!=0) && (matched==0))
- panic("commpage no match");
+ panic("commpage no match for last, next address %08x", rd->commpage_address);
cur_routine = rd->commpage_address;
matched = 0;
}
if ((must == rd->musthave) && (cant == 0)) {
if (matched)
- panic("commpage duplicate matches");
+ panic("commpage multiple matches for address %08x", rd->commpage_address);
matched = 1;
commpage_stuff(rd->commpage_address,rd->code_address,rd->code_length);
}
}
-
-#define COMMPAGE_DESC(name) commpage_ ## name
-#define EXTERN_COMMPAGE_DESC(name) \
- extern commpage_descriptor COMMPAGE_DESC(name)
-
-EXTERN_COMMPAGE_DESC(compare_and_swap32_mp);
-EXTERN_COMMPAGE_DESC(compare_and_swap32_up);
-EXTERN_COMMPAGE_DESC(compare_and_swap64_mp);
-EXTERN_COMMPAGE_DESC(compare_and_swap64_up);
-EXTERN_COMMPAGE_DESC(atomic_add32_mp);
-EXTERN_COMMPAGE_DESC(atomic_add32_up);
-EXTERN_COMMPAGE_DESC(mach_absolute_time);
-EXTERN_COMMPAGE_DESC(spin_lock_try_mp);
-EXTERN_COMMPAGE_DESC(spin_lock_try_up);
-EXTERN_COMMPAGE_DESC(spin_lock_mp);
-EXTERN_COMMPAGE_DESC(spin_lock_up);
-EXTERN_COMMPAGE_DESC(spin_unlock);
-EXTERN_COMMPAGE_DESC(pthread_getspecific);
-EXTERN_COMMPAGE_DESC(gettimeofday);
-EXTERN_COMMPAGE_DESC(sys_flush_dcache);
-EXTERN_COMMPAGE_DESC(sys_icache_invalidate);
-EXTERN_COMMPAGE_DESC(pthread_self);
-EXTERN_COMMPAGE_DESC(relinquish);
-EXTERN_COMMPAGE_DESC(bit_test_and_set_mp);
-EXTERN_COMMPAGE_DESC(bit_test_and_set_up);
-EXTERN_COMMPAGE_DESC(bit_test_and_clear_mp);
-EXTERN_COMMPAGE_DESC(bit_test_and_clear_up);
-EXTERN_COMMPAGE_DESC(bzero_scalar);
-EXTERN_COMMPAGE_DESC(bcopy_scalar);
-EXTERN_COMMPAGE_DESC(nanotime);
-
-static commpage_descriptor *routines[] = {
- &COMMPAGE_DESC(compare_and_swap32_mp),
- &COMMPAGE_DESC(compare_and_swap32_up),
- &COMMPAGE_DESC(compare_and_swap64_mp),
- &COMMPAGE_DESC(compare_and_swap64_up),
- &COMMPAGE_DESC(atomic_add32_mp),
- &COMMPAGE_DESC(atomic_add32_up),
- &COMMPAGE_DESC(mach_absolute_time),
- &COMMPAGE_DESC(spin_lock_try_mp),
- &COMMPAGE_DESC(spin_lock_try_up),
- &COMMPAGE_DESC(spin_lock_mp),
- &COMMPAGE_DESC(spin_lock_up),
- &COMMPAGE_DESC(spin_unlock),
- &COMMPAGE_DESC(pthread_getspecific),
- &COMMPAGE_DESC(gettimeofday),
- &COMMPAGE_DESC(sys_flush_dcache),
- &COMMPAGE_DESC(sys_icache_invalidate),
- &COMMPAGE_DESC(pthread_self),
- &COMMPAGE_DESC(relinquish),
- &COMMPAGE_DESC(bit_test_and_set_mp),
- &COMMPAGE_DESC(bit_test_and_set_up),
- &COMMPAGE_DESC(bit_test_and_clear_mp),
- &COMMPAGE_DESC(bit_test_and_clear_up),
- &COMMPAGE_DESC(bzero_scalar),
- &COMMPAGE_DESC(bcopy_scalar),
- &COMMPAGE_DESC(nanotime),
- NULL
-};
-
-
-/* Fill in commpage: called once, during kernel initialization, from the
- * startup thread before user-mode code is running.
- * See the top of this file for a list of what you have to do to add
- * a new routine to the commpage.
+/* Fill in the 32- or 64-bit commpage. Called once for each.
*/
-void
-commpage_populate( void )
+static void
+commpage_populate_one(
+ vm_map_t submap, // commpage32_map or compage64_map
+ char ** kernAddressPtr, // &commPagePtr32 or &commPagePtr64
+ size_t area_used, // _COMM_PAGE32_AREA_USED or _COMM_PAGE64_AREA_USED
+ commpage_address_t base_offset, // will become commPageBaseOffset
+ commpage_descriptor** commpage_routines, // list of routine ptrs for this commpage
+ commpage_time_data** time_data, // &time_data32 or &time_data64
+ const char* signature ) // "commpage 32-bit" or "commpage 64-bit"
{
+ uint8_t c1;
short c2;
- static double two52 = 1048576.0 * 1048576.0 * 4096.0; // 2**52
- static double ten6 = 1000000.0; // 10**6
+ int c4;
+ uint64_t c8;
+ uint32_t cfamily;
commpage_descriptor **rd;
short version = _COMM_PAGE_THIS_VERSION;
- commPagePtr = (char *)commpage_allocate();
+ next = 0;
+ cur_routine = 0;
+ commPagePtr = (char *)commpage_allocate( submap, (vm_size_t) area_used );
+ *kernAddressPtr = commPagePtr; // save address either in commPagePtr32 or 64
+ commPageBaseOffset = base_offset;
- commpage_init_cpu_capabilities();
+ *time_data = commpage_addr_of( _COMM_PAGE_TIME_DATA_START );
/* Stuff in the constants. We move things into the comm page in strictly
* ascending order, so we can check for overlap and panic if so.
*/
+ commpage_stuff(_COMM_PAGE_SIGNATURE,signature,(int)strlen(signature));
+ commpage_stuff(_COMM_PAGE_VERSION,&version,sizeof(short));
+ commpage_stuff(_COMM_PAGE_CPU_CAPABILITIES,&_cpu_capabilities,sizeof(int));
- commpage_stuff2(_COMM_PAGE_VERSION,&version,sizeof(short));
- commpage_stuff(_COMM_PAGE_CPU_CAPABILITIES,&_cpu_capabilities,
- sizeof(int));
-
- if (_cpu_capabilities & kCache32)
- c2 = 32;
- else if (_cpu_capabilities & kCache64)
+ c2 = 32; // default
+ if (_cpu_capabilities & kCache64)
c2 = 64;
else if (_cpu_capabilities & kCache128)
c2 = 128;
commpage_stuff(_COMM_PAGE_CACHE_LINESIZE,&c2,2);
+
+ c4 = MP_SPIN_TRIES;
+ commpage_stuff(_COMM_PAGE_SPIN_COUNT,&c4,4);
- c2 = 32;
+ /* machine_info valid after ml_get_max_cpus() */
+ c1 = machine_info.physical_cpu_max;
+ commpage_stuff(_COMM_PAGE_PHYSICAL_CPUS,&c1,1);
+ c1 = machine_info.logical_cpu_max;
+ commpage_stuff(_COMM_PAGE_LOGICAL_CPUS,&c1,1);
- commpage_stuff2(_COMM_PAGE_2_TO_52,&two52,8);
+ c8 = ml_cpu_cache_size(0);
+ commpage_stuff(_COMM_PAGE_MEMORY_SIZE, &c8, 8);
- commpage_stuff2(_COMM_PAGE_10_TO_6,&ten6,8);
+ cfamily = cpuid_info()->cpuid_cpufamily;
+ commpage_stuff(_COMM_PAGE_CPUFAMILY, &cfamily, 4);
- for( rd = routines; *rd != NULL ; rd++ )
+ for( rd = commpage_routines; *rd != NULL ; rd++ )
commpage_stuff_routine(*rd);
if (!matched)
panic("commpage no match on last routine");
- if (next > (uintptr_t)_COMM_PAGE_END)
- panic("commpage overflow: next = 0x%08x, commPagePtr = 0x%08x", next, (uintptr_t)commPagePtr);
+ if (next > _COMM_PAGE_END)
+ panic("commpage overflow: next = 0x%08x, commPagePtr = 0x%p", next, commPagePtr);
+
+}
- pmap_commpage_init((vm_offset_t) commPagePtr, _COMM_PAGE_BASE_ADDRESS,
- _COMM_PAGE_AREA_LENGTH/INTEL_PGBYTES);
+/* Fill in commpages: called once, during kernel initialization, from the
+ * startup thread before user-mode code is running.
+ *
+ * See the top of this file for a list of what you have to do to add
+ * a new routine to the commpage.
+ */
+
+void
+commpage_populate( void )
+{
+ commpage_init_cpu_capabilities();
+
+ commpage_populate_one( commpage32_map,
+ &commPagePtr32,
+ _COMM_PAGE32_AREA_USED,
+ _COMM_PAGE32_BASE_ADDRESS,
+ commpage_32_routines,
+ &time_data32,
+ "commpage 32-bit");
+#ifndef __LP64__
+ pmap_commpage32_init((vm_offset_t) commPagePtr32, _COMM_PAGE32_BASE_ADDRESS,
+ _COMM_PAGE32_AREA_USED/INTEL_PGBYTES);
+#endif
+ time_data64 = time_data32; /* if no 64-bit commpage, point to 32-bit */
+
+ if (_cpu_capabilities & k64Bit) {
+ commpage_populate_one( commpage64_map,
+ &commPagePtr64,
+ _COMM_PAGE64_AREA_USED,
+ _COMM_PAGE32_START_ADDRESS, /* commpage address are relative to 32-bit commpage placement */
+ commpage_64_routines,
+ &time_data64,
+ "commpage 64-bit");
+#ifndef __LP64__
+ pmap_commpage64_init((vm_offset_t) commPagePtr64, _COMM_PAGE64_BASE_ADDRESS,
+ _COMM_PAGE64_AREA_USED/INTEL_PGBYTES);
+#endif
+ }
+
+ simple_lock_init(&commpage_active_cpus_lock, 0);
+
+ commpage_update_active_cpus();
+ rtc_nanotime_init_commpage();
}
-/*
- * This macro prevents compiler instruction scheduling:
+
+/* Update commpage nanotime information. Note that we interleave
+ * setting the 32- and 64-bit commpages, in order to keep nanotime more
+ * nearly in sync between the two environments.
+ *
+ * This routine must be serialized by some external means, ie a lock.
+ */
+
+void
+commpage_set_nanotime(
+ uint64_t tsc_base,
+ uint64_t ns_base,
+ uint32_t scale,
+ uint32_t shift )
+{
+ commpage_time_data *p32 = time_data32;
+ commpage_time_data *p64 = time_data64;
+ static uint32_t generation = 0;
+ uint32_t next_gen;
+
+ if (p32 == NULL) /* have commpages been allocated yet? */
+ return;
+
+ if ( generation != p32->nt_generation )
+ panic("nanotime trouble 1"); /* possibly not serialized */
+ if ( ns_base < p32->nt_ns_base )
+ panic("nanotime trouble 2");
+ if ((shift != 32) && ((_cpu_capabilities & kSlow)==0) )
+ panic("nanotime trouble 3");
+
+ next_gen = ++generation;
+ if (next_gen == 0)
+ next_gen = ++generation;
+
+ p32->nt_generation = 0; /* mark invalid, so commpage won't try to use it */
+ p64->nt_generation = 0;
+
+ p32->nt_tsc_base = tsc_base;
+ p64->nt_tsc_base = tsc_base;
+
+ p32->nt_ns_base = ns_base;
+ p64->nt_ns_base = ns_base;
+
+ p32->nt_scale = scale;
+ p64->nt_scale = scale;
+
+ p32->nt_shift = shift;
+ p64->nt_shift = shift;
+
+ p32->nt_generation = next_gen; /* mark data as valid */
+ p64->nt_generation = next_gen;
+}
+
+
+/* Disable commpage gettimeofday(), forcing commpage to call through to the kernel. */
+
+void
+commpage_disable_timestamp( void )
+{
+ time_data32->gtod_generation = 0;
+ time_data64->gtod_generation = 0;
+}
+
+
+/* Update commpage gettimeofday() information. As with nanotime(), we interleave
+ * updates to the 32- and 64-bit commpage, in order to keep time more nearly in sync
+ * between the two environments.
+ *
+ * This routine must be serializeed by some external means, ie a lock.
*/
-#define NO_REORDERING asm volatile("" : : : "memory")
+
+ void
+ commpage_set_timestamp(
+ uint64_t abstime,
+ uint64_t secs )
+{
+ commpage_time_data *p32 = time_data32;
+ commpage_time_data *p64 = time_data64;
+ static uint32_t generation = 0;
+ uint32_t next_gen;
+
+ next_gen = ++generation;
+ if (next_gen == 0)
+ next_gen = ++generation;
+
+ p32->gtod_generation = 0; /* mark invalid, so commpage won't try to use it */
+ p64->gtod_generation = 0;
+
+ p32->gtod_ns_base = abstime;
+ p64->gtod_ns_base = abstime;
+
+ p32->gtod_sec_base = secs;
+ p64->gtod_sec_base = secs;
+
+ p32->gtod_generation = next_gen; /* mark data as valid */
+ p64->gtod_generation = next_gen;
+}
+
+
+/* Update _COMM_PAGE_MEMORY_PRESSURE. Called periodically from vm's compute_memory_pressure() */
void
-commpage_set_nanotime(commpage_nanotime_t *newp)
+commpage_set_memory_pressure(
+ unsigned int pressure )
{
- commpage_nanotime_t *cnp;
+ char *cp;
+ uint32_t *ip;
+
+ cp = commPagePtr32;
+ if ( cp ) {
+ cp += (_COMM_PAGE_MEMORY_PRESSURE - _COMM_PAGE32_BASE_ADDRESS);
+ ip = (uint32_t*) cp;
+ *ip = (uint32_t) pressure;
+ }
+
+ cp = commPagePtr64;
+ if ( cp ) {
+ cp += (_COMM_PAGE_MEMORY_PRESSURE - _COMM_PAGE32_START_ADDRESS);
+ ip = (uint32_t*) cp;
+ *ip = (uint32_t) pressure;
+ }
- /* Nop if commpage not set up yet */
- if (commPagePtr == NULL)
+}
+
+
+/* Update _COMM_PAGE_SPIN_COUNT. We might want to reduce when running on a battery, etc. */
+
+void
+commpage_set_spin_count(
+ unsigned int count )
+{
+ char *cp;
+ uint32_t *ip;
+
+ if (count == 0) /* we test for 0 after decrement, not before */
+ count = 1;
+
+ cp = commPagePtr32;
+ if ( cp ) {
+ cp += (_COMM_PAGE_SPIN_COUNT - _COMM_PAGE32_BASE_ADDRESS);
+ ip = (uint32_t*) cp;
+ *ip = (uint32_t) count;
+ }
+
+ cp = commPagePtr64;
+ if ( cp ) {
+ cp += (_COMM_PAGE_SPIN_COUNT - _COMM_PAGE32_START_ADDRESS);
+ ip = (uint32_t*) cp;
+ *ip = (uint32_t) count;
+ }
+
+}
+
+/* Updated every time a logical CPU goes offline/online */
+void
+commpage_update_active_cpus(void)
+{
+ char *cp;
+ volatile uint8_t *ip;
+
+ /* At least 32-bit commpage must be initialized */
+ if (!commPagePtr32)
return;
- cnp = (commpage_nanotime_t *)commpage_addr_of(_COMM_PAGE_NANOTIME_INFO);
+ simple_lock(&commpage_active_cpus_lock);
- /*
- * Update in reverse order:
- * check_tsc first - it's read and compared with base_tsc last.
- */
- cnp->nt_check_tsc = newp->nt_base_tsc; NO_REORDERING;
- cnp->nt_shift = newp->nt_shift; NO_REORDERING;
- cnp->nt_scale = newp->nt_scale; NO_REORDERING;
- cnp->nt_base_ns = newp->nt_base_ns; NO_REORDERING;
- cnp->nt_base_tsc = newp->nt_base_tsc;
+ cp = commPagePtr32;
+ cp += (_COMM_PAGE_ACTIVE_CPUS - _COMM_PAGE32_BASE_ADDRESS);
+ ip = (volatile uint8_t*) cp;
+ *ip = (uint8_t) processor_avail_count;
+
+ cp = commPagePtr64;
+ if ( cp ) {
+ cp += (_COMM_PAGE_ACTIVE_CPUS - _COMM_PAGE32_START_ADDRESS);
+ ip = (volatile uint8_t*) cp;
+ *ip = (uint8_t) processor_avail_count;
+ }
+
+ simple_unlock(&commpage_active_cpus_lock);
+}
+
+
+/* Check to see if a given address is in the Preemption Free Zone (PFZ) */
+
+uint32_t
+commpage_is_in_pfz32(uint32_t addr32)
+{
+ if ( (addr32 >= _COMM_PAGE_PFZ_START) && (addr32 < _COMM_PAGE_PFZ_END)) {
+ return 1;
+ }
+ else
+ return 0;
+}
+
+uint32_t
+commpage_is_in_pfz64(addr64_t addr64)
+{
+ if ( (addr64 >= _COMM_PAGE_32_TO_64(_COMM_PAGE_PFZ_START))
+ && (addr64 < _COMM_PAGE_32_TO_64(_COMM_PAGE_PFZ_END))) {
+ return 1;
+ }
+ else
+ return 0;
}
projects / apple / xnu.git / blobdiff