x86_64: pmap: map all of physical memory starting at VM_PAGEMAP_BASE

2023-02-07 15:38:18 +00:00
parent e939aae775
commit ad63f0b251
2 changed files with 31 additions and 6 deletions
--- a/arch/x86_64/include/socks/machine/vm.h
+++ b/arch/x86_64/include/socks/machine/vm.h
@@ -1,8 +1,16 @@
 #ifndef SOCKS_X86_64_VM_H_
 #define SOCKS_X86_64_VM_H_

+/* kernel higher-half base virtual address. */
 #define VM_KERNEL_VOFFSET 0xFFFFFFFF80000000

+/* direct page-mapping region.
+   NOTE that these are the maximum bounds of this region.
+   the actual size depends on the amount of physical
+   memory present. */
+#define VM_PAGEMAP_BASE   0xFFFF888000000000
+#define VM_PAGEMAP_LIMIT  0xFFFFC87FFFFFFFFF
+
 #define VM_PAGE_SIZE  0x1000
 #define VM_PAGE_MASK  (VM_PAGE_SIZE-1)
 #define VM_PAGE_SHIFT 12