u64 __init __lmb_alloc_base(u64 size, u64 align, u64 max_addr)
{
long i, j;
u64 base = 0;
u64 res_base;
BUG_ON(0 == size);
size = lmb_align_up(size, align);
/* On some platforms, make sure we allocate lowmem */
/* Note that LMB_REAL_LIMIT may be LMB_ALLOC_ANYWHERE */
if (max_addr == LMB_ALLOC_ANYWHERE)
max_addr = LMB_REAL_LIMIT;
for (i = lmb.memory.cnt - 1; i >= 0; i--) {
u64 lmbbase = lmb.memory.region[i].base;
u64 lmbsize = lmb.memory.region[i].size;
if (lmbsize < size)
continue;
if (max_addr == LMB_ALLOC_ANYWHERE)
base = lmb_align_down(lmbbase + lmbsize - size, align);
else if (lmbbase < max_addr) {
base = min(lmbbase + lmbsize, max_addr);
base = lmb_align_down(base - size, align);
} else
continue;
while (base && lmbbase <= base) {
j = lmb_overlaps_region(&lmb.reserved, base, size);
if (j < 0) {
/* this area isn't reserved, take it */
if (lmb_add_region(&lmb.reserved, base, size) < 0)
return 0;
return base;
}
res_base = lmb.reserved.region[j].base;
if (res_base < size)
break;
base = lmb_align_down(res_base - size, align);
}
}
return 0;
}
phys_addr_t __lmb_alloc_base(struct lmb *lmb, phys_size_t size, ulong align, phys_addr_t max_addr)
{
long i, j;
phys_addr_t base = 0;
phys_addr_t res_base;
for (i = lmb->memory.cnt-1; i >= 0; i--) {
phys_addr_t lmbbase = lmb->memory.region[i].base;
phys_size_t lmbsize = lmb->memory.region[i].size;
if (lmbsize < size)
continue;
if (max_addr == LMB_ALLOC_ANYWHERE)
base = lmb_align_down(lmbbase + lmbsize - size, align);
else if (lmbbase < max_addr) {
base = lmbbase + lmbsize;
if (base < lmbbase)
base = -1;
base = min(base, max_addr);
base = lmb_align_down(base - size, align);
} else
continue;
while (base && lmbbase <= base) {
j = lmb_overlaps_region(&lmb->reserved, base, size);
if (j < 0) {
/* This area isn't reserved, take it */
if (lmb_add_region(&lmb->reserved, base,
lmb_align_up(size,
align)) < 0)
return 0;
return base;
}
res_base = lmb->reserved.region[j].base;
if (res_base < size)
break;
base = lmb_align_down(res_base - size, align);
}
}
return 0;
}
static u64 __init lmb_alloc_nid_unreserved(u64 start, u64 end,
u64 size, u64 align)
{
u64 base, res_base;
long j;
base = lmb_align_down((end - size), align);
while (start <= base) {
j = lmb_overlaps_region(&lmb.reserved, base, size);
if (j < 0) {
/* this area isn't reserved, take it */
if (lmb_add_region(&lmb.reserved, base, size) < 0)
base = ~(u64)0;
return base;
}
res_base = lmb.reserved.region[j].base;
if (res_base < size)
break;
base = lmb_align_down(res_base - size, align);
}
return ~(u64)0;
}