minix/lib/libsys/vm_map_phys.c

   1 #include "syslib.h"
   2
   3 #include <sys/mman.h>
   4 #include <minix/vm.h>
   5 #include <stdarg.h>
   6 #include <string.h>
   7
   8 void *
   9 vm_map_phys(endpoint_t who, void *phaddr, size_t len)
  10 {
  11         message m;
  12         int r;
  13
  14         memset(&m, 0, sizeof(m));
  15         m.m_lsys_vm_map_phys.ep = who;
  16         m.m_lsys_vm_map_phys.phaddr = (phys_bytes)phaddr;
  17         m.m_lsys_vm_map_phys.len = len;
  18
  19         r = _taskcall(VM_PROC_NR, VM_MAP_PHYS, &m);
  20
  21         if (r != OK) return MAP_FAILED;
  22
  23         r = sef_llvm_add_special_mem_region(m.m_lsys_vm_map_phys.reply,
  24             len, NULL);
  25         if(r < 0) {
  26             printf("vm_map_phys: add_special_mem_region failed: %d\n", r);
  27         }
  28
  29         return m.m_lsys_vm_map_phys.reply;
  30 }
  31
  32 int
  33 vm_unmap_phys(endpoint_t who, void *vaddr, size_t len)
  34 {
  35         message m;
  36         int r;
  37
  38         memset(&m, 0, sizeof(m));
  39         m.m_lsys_vm_unmap_phys.ep = who;
  40         m.m_lsys_vm_unmap_phys.vaddr = vaddr;
  41
  42         r = _taskcall(VM_PROC_NR, VM_UNMAP_PHYS, &m);
  43
  44         if(r != OK) return r;
  45
  46         r = sef_llvm_del_special_mem_region_by_addr(vaddr);
  47         if(r < 0) {
  48             printf("vm_map_phys: del_special_mem_region failed: %d\n", r);
  49         }
  50
  51         return OK;
  52 }