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#include <apos/mem_regions.h>
#include <apos/vmem.h>
#include <arch/vmem.h>
stat_t init_uvmem(struct tcb *t, vm_t base, vm_t top)
{
return sp_mem_init(&t->sp_r, base, top);
}
vm_t alloc_uvmem(struct tcb *t, size_t size, vmflags_t flags)
{
vm_t v = alloc_region(&t->sp_r, size, &size);
return map_allocd_region(t->b_r, v, size, flags);
}
vm_t alloc_fixed_uvmem(struct tcb *t, vm_t start, size_t size, vmflags_t flags)
{
vm_t v = alloc_fixed_region(&t->sp_r, start, size, &size);
return map_allocd_region(t->b_r, v, size, flags);
}
stat_t free_uvmem(struct tcb *t, vm_t va)
{
struct sp_mem *m = sp_used_find(&t->sp_r, va);
if(!m)
return -1;
pm_t pa = __addr(m->end - m->start);
free_region(&t->sp_r, va);
unmap_freed_region(t->b_r, va, pa);
return 0;
}
stat_t alloc_uvmem_wrapper(struct vm_branch *b, pm_t *offset, vm_t vaddr, vmflags_t flags, enum mm_order order)
{
*offset = alloc_page(order, *offset);
if(!*offset)
return MEM_REGION_TRY_AGAIN; /* try again */
map_vpage(b, *offset, vaddr, flags, order);
return OK;
}
stat_t free_uvmem_wrapper(struct vm_branch *b, pm_t *offset, vm_t vaddr, vmflags_t flags, enum mm_order order)
{
UNUSED(flags); UNUSED(offset);
pm_t paddr = 0;
enum mm_order v_order = 0;
stat_vpage(b, vaddr, &paddr, &v_order, 0);
if(order != v_order)
return MEM_REGION_TRY_AGAIN;
unmap_vpage(b, vaddr);
free_page(order, paddr);
return 0;
}
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