xnu-4570.1.46.tar.gz

[apple/xnu.git] / osfmk / i386 / phys.c

diff --git a/osfmk/i386/phys.c b/osfmk/i386/phys.c
index 8ec71aa8729c169a8f9dbc4a99a84a48d944286e..49147fc2ae560b1cb29d884c991ea21ed6abd236 100644 (file)
--- a/osfmk/i386/phys.c
+++ b/osfmk/i386/phys.c
@@ -1,16 +1,19 @@
 /*
 /*

- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2012 Apple Inc. All rights reserved.

  *
  *

- * @APPLE_LICENSE_HEADER_START@
- * 
- * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@

  * 
  * This file contains Original Code and/or Modifications of Original Code
  * as defined in and that are subject to the Apple Public Source License
  * Version 2.0 (the 'License'). You may not use this file except in
  * 
  * This file contains Original Code and/or Modifications of Original Code
  * as defined in and that are subject to the Apple Public Source License
  * Version 2.0 (the 'License'). You may not use this file except in

- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ * 
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.

  * 
  * The Original Code and all software distributed under the License are
  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * 
  * The Original Code and all software distributed under the License are
  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER


@@ -20,7 +23,7 @@
  * Please see the License for the specific language governing rights and
  * limitations under the License.
  * 
  * Please see the License for the specific language governing rights and
  * limitations under the License.
  * 

- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@

  */
 /*
  * @OSF_COPYRIGHT@
  */
 /*
  * @OSF_COPYRIGHT@


@@ -50,25 +53,50 @@
  * any improvements or extensions that they make and grant Carnegie Mellon
  * the rights to redistribute these changes.
  */
  * any improvements or extensions that they make and grant Carnegie Mellon
  * the rights to redistribute these changes.
  */

-#include <string.h>

 
 

+#include <mach_debug.h>
+#include <mach_ldebug.h>
+
+#include <sys/kdebug.h>
+
+#include <mach/kern_return.h>
+#include <mach/thread_status.h>

 #include <mach/vm_param.h>
 #include <mach/vm_param.h>

-#include <mach/boolean.h>
-#include <vm/pmap.h>
-#include <vm/vm_page.h>
+
+#include <kern/counters.h>
+#include <kern/mach_param.h>
+#include <kern/task.h>
+#include <kern/thread.h>
+#include <kern/sched_prim.h>

 #include <kern/misc_protos.h>
 #include <kern/misc_protos.h>

+#include <kern/assert.h>
+#include <kern/spl.h>
+#include <ipc/ipc_port.h>
+#include <vm/vm_kern.h>
+#include <vm/vm_map.h>
+#include <vm/pmap.h>
+
+#include <i386/cpu_data.h>
+#include <i386/cpu_number.h>
+#include <i386/thread.h>
+#include <i386/eflags.h>
+#include <i386/proc_reg.h>
+#include <i386/seg.h>
+#include <i386/tss.h>
+#include <i386/user_ldt.h>
+#include <i386/fpu.h>
+#include <i386/misc_protos.h>

 
 /*
  *     pmap_zero_page zeros the specified (machine independent) page.
  */
 void
 pmap_zero_page(
 
 /*
  *     pmap_zero_page zeros the specified (machine independent) page.
  */
 void
 pmap_zero_page(

-              ppnum_t pn)
+       ppnum_t pn)

 {
 {

-        vm_offset_t p;

        assert(pn != vm_page_fictitious_addr);
        assert(pn != vm_page_fictitious_addr);

-       p = (vm_offset_t)i386_ptob(pn);
-       bzero((char *)phystokv(p), PAGE_SIZE);
+       assert(pn != vm_page_guard_addr);
+       bzero_phys((addr64_t)i386_ptob(pn), PAGE_SIZE);

 }
 
 /*
 }
 
 /*


@@ -77,32 +105,14 @@ pmap_zero_page(
  */
 void
 pmap_zero_part_page(
  */
 void
 pmap_zero_part_page(

-        ppnum_t         pn,
+       ppnum_t         pn,

        vm_offset_t     offset,
        vm_size_t       len)
 {
        assert(pn != vm_page_fictitious_addr);
        vm_offset_t     offset,
        vm_size_t       len)
 {
        assert(pn != vm_page_fictitious_addr);

+       assert(pn != vm_page_guard_addr);

        assert(offset + len <= PAGE_SIZE);
        assert(offset + len <= PAGE_SIZE);

-       bzero((char *)phystokv(i386_ptob(pn)) + offset, len);
-}
-
-/*
- *     pmap_copy_page copies the specified (machine independent) pages.
- */
-void
-pmap_copy_page(
-       ppnum_t  psrc,
-       ppnum_t  pdst)
-
-{
-        vm_offset_t src,dst;
-
-       assert(psrc != vm_page_fictitious_addr);
-       assert(pdst != vm_page_fictitious_addr);
-       src = (vm_offset_t)i386_ptob(psrc);
-       dst = (vm_offset_t)i386_ptob(pdst);
-
-       memcpy((void *)phystokv(dst), (void *)phystokv(src), PAGE_SIZE);
+       bzero_phys((addr64_t)(i386_ptob(pn) + offset), (uint32_t)len);

 }
 
 /*
 }
 
 /*


@@ -116,17 +126,22 @@ pmap_copy_part_page(
        vm_offset_t     dst_offset,
        vm_size_t       len)
 {
        vm_offset_t     dst_offset,
        vm_size_t       len)
 {

-        vm_offset_t  src, dst;
+        pmap_paddr_t src, dst;

 
        assert(psrc != vm_page_fictitious_addr);
        assert(pdst != vm_page_fictitious_addr);
 
        assert(psrc != vm_page_fictitious_addr);
        assert(pdst != vm_page_fictitious_addr);

-       src = (vm_offset_t)i386_ptob(psrc);
-       dst = (vm_offset_t)i386_ptob(pdst);
-       assert(((dst & PAGE_MASK) + dst_offset + len) <= PAGE_SIZE);
-       assert(((src & PAGE_MASK) + src_offset + len) <= PAGE_SIZE);
+       assert(psrc != vm_page_guard_addr);
+       assert(pdst != vm_page_guard_addr);
+
+       src = i386_ptob(psrc);
+       dst = i386_ptob(pdst);

 
 

-        memcpy((void *)(phystokv(dst) + dst_offset),
-              (void *)(phystokv(src) + src_offset), len);
+       assert((((uintptr_t)dst & PAGE_MASK) + dst_offset + len) <= PAGE_SIZE);
+       assert((((uintptr_t)src & PAGE_MASK) + src_offset + len) <= PAGE_SIZE);
+
+       bcopy_phys((addr64_t)src + (src_offset & INTEL_OFFMASK),
+                  (addr64_t)dst + (dst_offset & INTEL_OFFMASK),
+                  len);

 }
 
 /*
 }
 
 /*


@@ -135,19 +150,16 @@ pmap_copy_part_page(
  */
 void
 pmap_copy_part_lpage(
  */
 void
 pmap_copy_part_lpage(

-       vm_offset_t     src,
-       ppnum_t         pdst,
-       vm_offset_t     dst_offset,
-       vm_size_t       len)
+       __unused vm_offset_t    src,
+       __unused ppnum_t        pdst,
+       __unused vm_offset_t    dst_offset,
+       __unused vm_size_t      len)

 {
 {

-        vm_offset_t dst;

 
 

-       assert(src != vm_page_fictitious_addr);

        assert(pdst != vm_page_fictitious_addr);
        assert(pdst != vm_page_fictitious_addr);

-       dst = (vm_offset_t)i386_ptob(pdst);
-       assert(((dst & PAGE_MASK) + dst_offset + len) <= PAGE_SIZE);
+       assert(pdst != vm_page_guard_addr);
+       assert((dst_offset + len) <= PAGE_SIZE);

 
 

-        memcpy((void *)(phystokv(dst) + dst_offset), (void *)src, len);

 }
 
 /*
 }
 
 /*


@@ -156,19 +168,16 @@ pmap_copy_part_lpage(
  */
 void
 pmap_copy_part_rpage(
  */
 void
 pmap_copy_part_rpage(

-       ppnum_t         psrc,
-       vm_offset_t     src_offset,
-       vm_offset_t     dst,
-       vm_size_t       len)
+       __unused ppnum_t                psrc,
+       __unused vm_offset_t    src_offset,
+       __unused vm_offset_t    dst,
+       __unused vm_size_t      len)

 {
 {

-        vm_offset_t src;

 
        assert(psrc != vm_page_fictitious_addr);
 
        assert(psrc != vm_page_fictitious_addr);

-       assert(dst != vm_page_fictitious_addr);
-       src = (vm_offset_t)i386_ptob(psrc);
-       assert(((src & PAGE_MASK) + src_offset + len) <= PAGE_SIZE);
+       assert(psrc != vm_page_guard_addr);
+       assert((src_offset + len) <= PAGE_SIZE);

 
 

-        memcpy((void *)dst, (void *)(phystokv(src) + src_offset), len);

 }
 
 /*
 }
 
 /*


@@ -176,13 +185,106 @@ pmap_copy_part_rpage(
  *
  *     Convert a kernel virtual address to a physical address
  */
  *
  *     Convert a kernel virtual address to a physical address
  */

-vm_offset_t
+addr64_t

 kvtophys(
        vm_offset_t addr)
 {
 kvtophys(
        vm_offset_t addr)
 {

-       pt_entry_t *pte;
+       pmap_paddr_t pa;
+
+       pa = ((pmap_paddr_t)pmap_find_phys(kernel_pmap, addr)) << INTEL_PGSHIFT;
+       if (pa)
+               pa |= (addr & INTEL_OFFMASK);
+
+       return ((addr64_t)pa);
+}
+
+extern pt_entry_t *debugger_ptep;
+extern vm_map_offset_t debugger_window_kva;
+extern int _bcopy(const void *, void *, vm_size_t);
+extern int _bcopy2(const void *, void *);
+extern int _bcopy4(const void *, void *);
+extern int _bcopy8(const void *, void *);
+
+__private_extern__ int ml_copy_phys(addr64_t src64, addr64_t dst64, vm_size_t bytes) {
+       void *src, *dst;
+       int err = 0;
+
+       mp_disable_preemption();
+#if NCOPY_WINDOWS > 0
+       mapwindow_t *src_map, *dst_map;
+       /* We rely on MTRRs here */
+       src_map = pmap_get_mapwindow((pt_entry_t)(INTEL_PTE_VALID | ((pmap_paddr_t)src64 & PG_FRAME) | INTEL_PTE_REF));
+       dst_map = pmap_get_mapwindow((pt_entry_t)(INTEL_PTE_VALID | INTEL_PTE_RW | ((pmap_paddr_t)dst64 & PG_FRAME) | INTEL_PTE_REF | INTEL_PTE_MOD));
+       src = (void *) ((uintptr_t)src_map->prv_CADDR | ((uint32_t)src64 & INTEL_OFFMASK));
+       dst = (void *) ((uintptr_t)dst_map->prv_CADDR | ((uint32_t)dst64 & INTEL_OFFMASK));
+#elif defined(__x86_64__)
+       addr64_t debug_pa = 0;
+
+       /* If either destination or source are outside the
+        * physical map, establish a physical window onto the target frame.
+        */
+       assert(physmap_enclosed(src64) || physmap_enclosed(dst64));
+
+       if (physmap_enclosed(src64) == FALSE) {
+               src = (void *)(debugger_window_kva | (src64 & INTEL_OFFMASK));
+               dst = PHYSMAP_PTOV(dst64);
+               debug_pa = src64 & PG_FRAME;
+       } else if (physmap_enclosed(dst64) == FALSE) {
+               src = PHYSMAP_PTOV(src64);
+               dst = (void *)(debugger_window_kva | (dst64 & INTEL_OFFMASK));
+               debug_pa = dst64 & PG_FRAME;
+       } else {
+               src = PHYSMAP_PTOV(src64);
+               dst = PHYSMAP_PTOV(dst64);
+       }
+       /* DRK: debugger only routine, we don't bother checking for an
+        * identical mapping.
+        */
+       if (debug_pa) {
+               if (debugger_window_kva == 0)
+                       panic("%s: invoked in non-debug mode", __FUNCTION__);
+               /* Establish a cache-inhibited physical window; some platforms
+                * may not cover arbitrary ranges with MTRRs
+                */
+               pmap_store_pte(debugger_ptep, debug_pa | INTEL_PTE_NCACHE | INTEL_PTE_RW | INTEL_PTE_REF| INTEL_PTE_MOD | INTEL_PTE_VALID);
+               flush_tlb_raw();
+#if    DEBUG
+               kprintf("Remapping debugger physical window at %p to 0x%llx\n", (void *)debugger_window_kva, debug_pa);
+#endif
+       }
+#endif
+       /* ensure we stay within a page */
+       if (((((uint32_t)src64 & (I386_PGBYTES-1)) + bytes) > I386_PGBYTES) || ((((uint32_t)dst64 & (I386_PGBYTES-1)) + bytes) > I386_PGBYTES) ) {
+               panic("ml_copy_phys spans pages, src: 0x%llx, dst: 0x%llx", src64, dst64);
+       }
+
+       /*
+        * For device register access from the debugger,
+        * 2-byte/16-bit, 4-byte/32-bit and 8-byte/64-bit copies are handled
+        * by assembly routines ensuring the required access widths.
+        * 1-byte and other copies are handled by the regular _bcopy.
+        */
+       switch (bytes) {
+       case 2:
+               err = _bcopy2(src, dst);
+               break;
+       case 4:
+               err = _bcopy4(src, dst);
+               break;
+       case 8:
+               err = _bcopy8(src, dst);
+               break;
+       case 1:
+       default:
+               err = _bcopy(src, dst, bytes);
+               break;
+       }
+
+#if NCOPY_WINDOWS > 0
+       pmap_put_mapwindow(src_map);
+       pmap_put_mapwindow(dst_map);
+#endif
+       mp_enable_preemption();

 
 

-       if ((pte = pmap_pte(kernel_pmap, addr)) == PT_ENTRY_NULL)
-               return 0;
-       return i386_trunc_page(*pte) | (addr & INTEL_OFFMASK);
+       return err;

 }
 }