lunaix-os/kernel/mm/mmio.c

   1 #include <lunaix/mm/mmio.h>
   2 #include <lunaix/mm/pmm.h>
   3 #include <lunaix/mm/vmm.h>
   4 #include <lunaix/spike.h>
   5
   6 void*
   7 ioremap(uintptr_t paddr, uint32_t size)
   8 {
   9     void* ptr = vmm_vmap(paddr, size, PG_PREM_RW | PG_DISABLE_CACHE);
  10     if (ptr) {
  11         pmm_mark_chunk_occupied(KERNEL_PID,
  12                                 paddr >> PG_SIZE_BITS,
  13                                 CEIL(size, PG_SIZE_BITS),
  14                                 PP_FGLOCKED);
  15     }
  16     return ptr;
  17 }
  18
  19 void*
  20 iounmap(uintptr_t vaddr, uint32_t size)
  21 {
  22     for (size_t i = 0; i < size; i += PG_SIZE) {
  23         uintptr_t paddr = vmm_del_mapping(PD_REFERENCED, vaddr + i);
  24         pmm_free_page(KERNEL_PID, paddr);
  25     }
  26 }