/******************************************************************************
* Reserve the memory region delimited by 'addr' and 'size'. The extents of free
* memory are passed in 'free_base' and 'free_size' and they will be updated to
* reflect the memory usage.
* The caller must ensure the memory to reserve is free.
*****************************************************************************/
void reserve_mem(uint64_t *free_base, size_t *free_size,
uint64_t addr, size_t size)
{
size_t discard_size;
size_t reserved_size;
unsigned int pos;
assert(free_base != NULL);
assert(free_size != NULL);
assert(is_mem_free(*free_base, *free_size, addr, size));
pos = choose_mem_pos(*free_base, *free_base + *free_size,
addr, addr + size,
&discard_size);
reserved_size = size + discard_size;
*free_size -= reserved_size;
if (pos == BOTTOM)
*free_base = addr + size;
VERBOSE("Reserved 0x%lx bytes (discarded 0x%lx bytes %s)\n",
reserved_size, discard_size,
pos == TOP ? "above" : "below");
}
/******************************************************************************
* Reserve the memory region delimited by 'addr' and 'size'. The extents of free
* memory are passed in 'free_base' and 'free_size' and they will be updated to
* reflect the memory usage.
* The caller must ensure the memory to reserve is free and that the addresses
* and sizes passed in arguments are sane.
*****************************************************************************/
void reserve_mem(uintptr_t *free_base, size_t *free_size,
uintptr_t addr, size_t size)
{
size_t discard_size;
size_t reserved_size;
unsigned int pos;
assert(free_base != NULL);
assert(free_size != NULL);
assert(is_mem_free(*free_base, *free_size, addr, size));
if (size == 0) {
WARN("Nothing to allocate, requested size is zero\n");
return;
}
pos = choose_mem_pos(*free_base, *free_base + (*free_size - 1),
addr, addr + (size - 1),
&discard_size);
reserved_size = size + discard_size;
*free_size -= reserved_size;
if (pos == BOTTOM)
*free_base = addr + size;
VERBOSE("Reserved 0x%zx bytes (discarded 0x%zx bytes %s)\n",
reserved_size, discard_size,
pos == TOP ? "above" : "below");
}
