cdi/cdi-mem.c

   1 #include <stddef.h>
   2 #include <stdlib.h>
   3 #include <cdi/mem.h>
   4
   5 struct cdi_mem_area *cdi_mem_alloc(size_t size, cdi_mem_flags_t flags)
   6 {
   7     if (flags & CDI_MEM_DMA_16M) {
   8         return NULL;
   9     }
  10
  11     uint32_t alignment = 1 << (flags & CDI_MEM_ALIGN_MASK);
  12
  13     struct cdi_mem_area *area = malloc(sizeof(*area));
  14     area->size = size;
  15     area->vaddr = (void *)(((uintptr_t)malloc(size + alignment - 1) + alignment - 1) & ~(alignment - 1));
  16     area->paddr.num = 1;
  17     area->paddr.items = malloc(sizeof(*area->paddr.items));
  18     area->paddr.items[0].start = (uintptr_t)area->vaddr;
  19     area->paddr.items[0].size = size;
  20
  21     return area;
  22 }