kernel/arch/x86_64/arch_vm.c

   1 /*
   2 ** Copyright 2001, Travis Geiselbrecht. All rights reserved.
   3 ** Distributed under the terms of the NewOS License.
   4 */
   5 #include <kernel/kernel.h>
   6 #include <kernel/console.h>
   7 #include <kernel/vm.h>
   8 #include <kernel/vm_page.h>
   9 #include <kernel/vm_priv.h>
  10 #include <kernel/debug.h>
  11
  12 #include <kernel/arch/vm.h>
  13 #include <kernel/arch/int.h>
  14 #include <kernel/arch/cpu.h>
  15
  16 #include <kernel/arch/i386/interrupts.h>
  17
  18 int arch_vm_init(kernel_args *ka)
  19 {
  20         dprintf("arch_vm_init: entry\n");
  21         return 0;
  22 }
  23
  24 int arch_vm_init2(kernel_args *ka)
  25 {
  26         dprintf("arch_vm_init2: entry\n");
  27
  28         // account for DMA area and mark the pages unusable
  29         vm_mark_page_range_inuse(0x0, 0xa0000 / PAGE_SIZE);
  30
  31         return 0;
  32 }
  33
  34 int arch_vm_init_existing_maps(kernel_args *ka)
  35 {
  36         return 0;
  37 }
  38
  39 int arch_vm_init_endvm(kernel_args *ka)
  40 {
  41         region_id id;
  42         void *ptr;
  43
  44         dprintf("arch_vm_init_endvm: entry\n");
  45
  46         // map 0 - 0xa0000 directly
  47         id = vm_map_physical_memory(vm_get_kernel_aspace_id(), "dma_region", &ptr,
  48                 REGION_ADDR_ANY_ADDRESS, 0xa0000, LOCK_RW|LOCK_KERNEL, 0x0);
  49         if(id < 0) {
  50                 panic("arch_vm_init_endvm: unable to map dma region\n");
  51                 return ERR_NO_MEMORY;
  52         }
  53         return 0;
  54 }
  55
  56 void arch_vm_aspace_swap(vm_address_space *aspace)
  57 {
  58         i386_swap_pgdir(vm_translation_map_get_pgdir(&aspace->translation_map));
  59 }
  60
  61