xnu-4570.41.2.tar.gz

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

diff --git a/osfmk/i386/hibernate_restore.c b/osfmk/i386/hibernate_restore.c
index bf0508a69f05b43348f6d6c6449af42acecf6c43..2e4c69e79acff166c17aaf1e8e71149fce63215b 100644 (file)
--- a/osfmk/i386/hibernate_restore.c
+++ b/osfmk/i386/hibernate_restore.c
@@ -31,10 +31,7 @@
 
 #include <i386/pal_hibernate.h>
 
-extern pd_entry_t BootstrapPTD[2048];
-
-#define TWO_MEG_MASK 0xFFFFFFFFFFE00000ULL
-#define FOUR_K_MASK 0xFFFFFFFFFFFFF000ULL
+extern pd_entry_t BootPTD[2048];
 
 // src is virtually mapped, not page aligned, 
 // dst is a physical 4k page aligned ptr, len is one 4K page
@@ -46,7 +43,6 @@ hibernate_restore_phys_page(uint64_t src, uint64_t dst, uint32_t len, uint32_t p
        (void)procFlags;
        uint64_t * d;
        uint64_t * s;
-       uint32_t idx;
 
        if (src == 0)
                return (uintptr_t)dst;
@@ -54,8 +50,7 @@ hibernate_restore_phys_page(uint64_t src, uint64_t dst, uint32_t len, uint32_t p
        d = (uint64_t *)pal_hib_map(DEST_COPY_AREA, dst);
        s = (uint64_t *) (uintptr_t)src;
 
-       for (idx = 0; idx < (len / (uint32_t)sizeof(uint64_t)); idx++) 
-               d[idx] = s[idx];
+       __nosan_memcpy(d, s, len);
 
        return (uintptr_t)d;
 }
@@ -63,63 +58,48 @@ hibernate_restore_phys_page(uint64_t src, uint64_t dst, uint32_t len, uint32_t p
 
 void hibprintf(const char *fmt, ...);
 
-void
-pal_hib_window_setup(ppnum_t page)
-{
-       uint64_t *pp;
-       uint64_t phys = ptoa_64(page);
-       int i;
-
-       BootstrapPTD[2047] = (phys & ~((uint64_t)I386_LPGMASK)) | INTEL_PTE_PS  | INTEL_PTE_VALID | INTEL_PTE_WRITE;
-
-       invlpg(HIB_PTES);
-
-       pp = (uint64_t *)(uintptr_t)(HIB_PTES + (phys & I386_LPGMASK));
-
-       for(i=0;i<512;i++)
-               *pp = 0;
-
-       pp[0] = phys | INTEL_PTE_VALID | INTEL_PTE_WRITE;
-       BootstrapPTD[2047] = phys | INTEL_PTE_VALID | INTEL_PTE_WRITE;
-
-       invlpg(HIB_PTES);
-}
-
 uintptr_t
-pal_hib_map(uintptr_t v, uint64_t p)
+pal_hib_map(uintptr_t virt, uint64_t phys)
 {
-       int index;
-
-       switch(v) {
-               case DEST_COPY_AREA:
-                       index = 1;
-                       break;
-               case SRC_COPY_AREA:
-                       index = 2;
-                       break;
-               case COPY_PAGE_AREA:
-                       index = 3;
-                       break;
-               default:
-                       index = -1;
-                       asm("cli;hlt;");
-       }
-
-       uint64_t *ptes = (uint64_t *)HIB_PTES;
-
-       /* Outside 1-1 4G map so set up the mappings for the dest page using 2MB pages */
-       ptes[index] = (p & FOUR_K_MASK) | INTEL_PTE_VALID | INTEL_PTE_WRITE;
-               
-       /* Invalidate the page tables for this */
-       invlpg((uintptr_t)v);
-
-       return v;
+    uintptr_t index;
+
+    switch (virt)
+    {
+       case DEST_COPY_AREA:
+       case SRC_COPY_AREA:
+       case COPY_PAGE_AREA:
+       case BITMAP_AREA:
+       case IMAGE_AREA:
+       case IMAGE2_AREA:
+           break;
+
+       default:
+           asm("cli;hlt;");
+           break;
+    }
+    if (phys < IMAGE2_AREA)
+    {
+       // first 4Gb is all mapped,
+       // and do not expect source areas to cross 4Gb
+        return (phys);
+    }
+    index = (virt >> I386_LPGSHIFT);
+    virt += (uintptr_t)(phys & I386_LPGMASK);
+    phys  = ((phys & ~((uint64_t)I386_LPGMASK)) | INTEL_PTE_PS  | INTEL_PTE_VALID | INTEL_PTE_WRITE);
+    if (phys == BootPTD[index]) return (virt);
+    BootPTD[index] = phys;
+    invlpg(virt);
+    BootPTD[index + 1] = (phys + I386_LPGBYTES);
+    invlpg(virt + I386_LPGBYTES);
+
+    return (virt);
 }
 
 void hibernateRestorePALState(uint32_t *arg)
 {
-       (void)arg;
+    (void)arg;
 }
+
 void
 pal_hib_patchup(void)
 {