static inline offset_t __npg_bk_op(offset_t start, offset_t end,
offset_t upper, uint64_t attr,
npg_op_t *op, uint8_t act)
{
offset_t addr;
if(op->nxt)
{
offset_t start_up = __align_next(start, op->sz);
bool_t diff_tbl = (pg_abs_idx(start, op->shf) != pg_abs_idx(end, op->shf));
if(__aligned(start, op->sz) && diff_tbl)
{
op->fnc[act](start, attr);
addr = start_up;
}
else
addr = __npg_bk_op(start, end, start_up, attr, op->nxt, act);
}
else
addr = __align(start, op->sz);
while(addr < min(__align(end, op->sz), upper))
{
op->fnc[act](addr, attr);
addr += op->sz;
}
return addr;
}
int __vm_access_mem(vm_access_t *access)
{
offset_t vaddr, nxt;
size_t psz, len;
if(!access->len)
return 1;
if(!__paging())
return access->operator(access);
vaddr = access->addr;
len = access->len;
while(len)
{
if(!__pg_walk(access->cr3, vaddr, &access->addr, &psz, 1))
{
debug(VM_ACCESS, "#PF on vm access 0x%X sz 0x%X\n", vaddr, len);
return 0;
}
nxt = __align_next(vaddr, psz);
access->len = min(len, (nxt - vaddr));
if(!access->operator(access))
return 0;
len -= access->len;
vaddr = nxt;
}
return 1;
}
