int cbmem_initialize_id_size(u32 id, u64 size)
{
struct imd *imd;
struct imd imd_backing;
const int recovery = 1;
cbmem_top_init_once();
imd = imd_init_backing(&imd_backing);
imd_handle_init(imd, cbmem_top());
if (imd_recover(imd))
return 1;
#if defined(__PRE_RAM__)
/*
* Lock the imd in romstage on a recovery. The assumption is that
* if the imd area was recovered in romstage then S3 resume path
* is being taken.
*/
imd_lockdown(imd);
#endif
/* Add the specified range first */
if (size)
cbmem_add(id, size);
/* Complete migration to CBMEM. */
cbmem_run_init_hooks(recovery);
/* Recovery successful. */
return 0;
}
void cbmem_initialize_empty_id_size(u32 id, u64 size)
{
struct imd *imd;
struct imd imd_backing;
const int no_recovery = 0;
cbmem_top_init_once();
imd = imd_init_backing(&imd_backing);
imd_handle_init(imd, cbmem_top());
printk(BIOS_DEBUG, "CBMEM:\n");
if (imd_create_tiered_empty(imd, CBMEM_ROOT_MIN_SIZE, CBMEM_LG_ALIGN,
CBMEM_SM_ROOT_SIZE, CBMEM_SM_ALIGN)) {
printk(BIOS_DEBUG, "failed.\n");
return;
}
/* Add the specified range first */
if (size)
cbmem_add(id, size);
/* Complete migration to CBMEM. */
cbmem_run_init_hooks(no_recovery);
}
void cbmem_initialize_empty(void)
{
uintptr_t pointer_addr;
uintptr_t root_addr;
unsigned long max_entries;
struct cbmem_root *root;
struct cbmem_root_pointer *pointer;
/* Place the root pointer and the root. The number of entries is
* dictated by difference between the root address and the pointer
* where the root address is aligned down to
* DYN_CBMEM_ALIGN_SIZE. The pointer falls just below the
* address returned by get_top_aligned(). */
pointer_addr = get_top_aligned();
if (pointer_addr == 0)
return;
root_addr = pointer_addr - ROOT_MIN_SIZE;
root_addr &= ~(DYN_CBMEM_ALIGN_SIZE - 1);
pointer_addr -= sizeof(struct cbmem_root_pointer);
max_entries = (pointer_addr - (root_addr + sizeof(*root))) /
sizeof(struct cbmem_entry);
pointer = (void *)pointer_addr;
pointer->magic = CBMEM_POINTER_MAGIC;
pointer->root = root_addr;
root = (void *)root_addr;
root->max_entries = max_entries;
root->num_entries = 0;
root->locked = 0;
root->size = pointer_addr - root_addr +
sizeof(struct cbmem_root_pointer);
/* Add an entry covering the root region. */
cbmem_entry_append(root, CBMEM_ID_ROOT, root_addr, root->size);
printk(BIOS_DEBUG, "CBMEM: root @ %p %d entries.\n",
root, root->max_entries);
/* Complete migration to CBMEM. */
cbmem_run_init_hooks();
}
int cbmem_initialize(void)
{
struct cbmem_root *root;
uintptr_t top_according_to_root;
root = get_root();
/* No recovery possible since root couldn't be recovered. */
if (root == NULL)
return cbmem_fail_recovery();
/* Sanity check the root. */
top_according_to_root = (root->size + (uintptr_t)root);
if (get_top_aligned() != top_according_to_root)
return cbmem_fail_recovery();
if (root->num_entries > root->max_entries)
return cbmem_fail_recovery();
if ((root->max_entries * sizeof(struct cbmem_entry)) >
(root->size - sizeof(struct cbmem_root_pointer) - sizeof(*root)))
return cbmem_fail_recovery();
/* Validate current entries. */
if (validate_entries(root))
return cbmem_fail_recovery();
#if defined(__PRE_RAM__)
/* Lock the root in the romstage on a recovery. The assumption is that
* recovery is called during romstage on the S3 resume path. */
root->locked = 1;
#endif
/* Complete migration to CBMEM. */
cbmem_run_init_hooks();
/* Recovery successful. */
return 0;
}