xnu-4570.71.2.tar.gz

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

diff --git a/osfmk/i386/phys.c b/osfmk/i386/phys.c
index 5c3449325c635db9a3a75accd0c547ede88be915..49147fc2ae560b1cb29d884c991ea21ed6abd236 100644 (file)
--- a/osfmk/i386/phys.c
+++ b/osfmk/i386/phys.c
@@ -1,5 +1,5 @@
 /*
 /*

- * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2012 Apple Inc. All rights reserved.

  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 


@@ -54,7 +54,6 @@
  * the rights to redistribute these changes.
  */
 
  * the rights to redistribute these changes.
  */
 

-#include <mach_rt.h>

 #include <mach_debug.h>
 #include <mach_ldebug.h>
 
 #include <mach_debug.h>
 #include <mach_ldebug.h>
 


@@ -86,7 +85,6 @@
 #include <i386/tss.h>
 #include <i386/user_ldt.h>
 #include <i386/fpu.h>
 #include <i386/tss.h>
 #include <i386/user_ldt.h>
 #include <i386/fpu.h>

-#include <i386/iopb_entries.h>

 #include <i386/misc_protos.h>
 
 /*
 #include <i386/misc_protos.h>
 
 /*


@@ -94,9 +92,10 @@
  */
 void
 pmap_zero_page(
  */
 void
 pmap_zero_page(

-              ppnum_t pn)
+       ppnum_t pn)

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

+       assert(pn != vm_page_guard_addr);

        bzero_phys((addr64_t)i386_ptob(pn), PAGE_SIZE);
 }
 
        bzero_phys((addr64_t)i386_ptob(pn), PAGE_SIZE);
 }
 


@@ -106,13 +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_phys((addr64_t)(i386_ptob(pn) + offset), len);
+       bzero_phys((addr64_t)(i386_ptob(pn) + offset), (uint32_t)len);

 }
 
 /*
 }
 
 /*


@@ -130,12 +130,14 @@ pmap_copy_part_page(
 
        assert(psrc != vm_page_fictitious_addr);
        assert(pdst != vm_page_fictitious_addr);
 
        assert(psrc != vm_page_fictitious_addr);
        assert(pdst != vm_page_fictitious_addr);

+       assert(psrc != vm_page_guard_addr);
+       assert(pdst != vm_page_guard_addr);

 
        src = i386_ptob(psrc);
        dst = i386_ptob(pdst);
 
 
        src = i386_ptob(psrc);
        dst = i386_ptob(pdst);
 

-       assert((((uint32_t)dst & PAGE_MASK) + dst_offset + len) <= PAGE_SIZE);
-       assert((((uint32_t)src & PAGE_MASK) + src_offset + len) <= PAGE_SIZE);
+       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),
 
        bcopy_phys((addr64_t)src + (src_offset & INTEL_OFFMASK),
                   (addr64_t)dst + (dst_offset & INTEL_OFFMASK),


@@ -148,29 +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)

 {
 {

-        mapwindow_t *map;

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

+       assert(pdst != vm_page_guard_addr);

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

-        mp_disable_preemption();
-
-        map = pmap_get_mapwindow(INTEL_PTE_VALID | INTEL_PTE_RW | (i386_ptob(pdst) & PG_FRAME) | 
-                                 INTEL_PTE_REF | INTEL_PTE_MOD);
-       if (map == 0) {
-               panic("pmap_copy_part_lpage");
-        }
-       invlpg((uintptr_t)map->prv_CADDR);
-
-       memcpy((void *) (map->prv_CADDR + (dst_offset & INTEL_OFFMASK)), (void *) src, len);
-       *map->prv_CMAP = 0;
-
-       mp_enable_preemption();

 }
 
 /*
 }
 
 /*


@@ -179,29 +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)

 {
 {

-        mapwindow_t *map;

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

+       assert(psrc != vm_page_guard_addr);

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

-        mp_disable_preemption();
-
-        map = pmap_get_mapwindow(INTEL_PTE_VALID | INTEL_PTE_RW | (i386_ptob(psrc) & PG_FRAME) | 
-                                 INTEL_PTE_REF);
-       if (map == 0) {
-               panic("pmap_copy_part_rpage");
-        }
-       invlpg((uintptr_t) map->prv_CADDR);
-
-       memcpy((void *) dst, (void *) (map->prv_CADDR + (src_offset & INTEL_OFFMASK)), len);
-       *map->prv_CMAP = 0;
-
-       mp_enable_preemption();

 }
 
 /*
 }
 
 /*


@@ -213,16 +189,102 @@ addr64_t
 kvtophys(
        vm_offset_t addr)
 {
 kvtophys(
        vm_offset_t addr)
 {

-        pt_entry_t *ptep;

        pmap_paddr_t pa;
        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();
        mp_disable_preemption();

-       if ((ptep = pmap_pte(kernel_pmap, (vm_map_offset_t)addr)) == PT_ENTRY_NULL) {
-               pa = 0;
+#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 {
        } else {

-               pa =  pte_to_pa(*ptep) | (addr & INTEL_OFFMASK);
+               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;

        }
        }

-       mp_enable_preemption_no_check();
-       return ((addr64_t)pa);
-}

 
 

+#if NCOPY_WINDOWS > 0
+       pmap_put_mapwindow(src_map);
+       pmap_put_mapwindow(dst_map);
+#endif
+       mp_enable_preemption();
+
+       return err;
+}