| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <assert.h> |
| #include <boot/coreboot_tables.h> |
| #include <bootstate.h> |
| #include <bootmem.h> |
| #include <console/console.h> |
| #include <cbmem.h> |
| #include <imd.h> |
| #include <lib.h> |
| #include <stdlib.h> |
| |
| /* The program loader passes on cbmem_top and the program entry point |
| has to fill in the _cbmem_top_ptr symbol based on the calling arguments. */ |
| uintptr_t _cbmem_top_ptr; |
| |
| static struct imd imd; |
| |
| void *cbmem_top(void) |
| { |
| if (ENV_ROMSTAGE) { |
| static void *top; |
| if (top) |
| return top; |
| top = cbmem_top_chipset(); |
| return top; |
| } |
| if (ENV_POSTCAR || ENV_RAMSTAGE) |
| return (void *)_cbmem_top_ptr; |
| |
| dead_code(); |
| } |
| |
| static inline const struct cbmem_entry *imd_to_cbmem(const struct imd_entry *e) |
| { |
| return (const struct cbmem_entry *)e; |
| } |
| |
| static inline const struct imd_entry *cbmem_to_imd(const struct cbmem_entry *e) |
| { |
| return (const struct imd_entry *)e; |
| } |
| |
| void cbmem_initialize_empty(void) |
| { |
| cbmem_initialize_empty_id_size(0, 0); |
| } |
| |
| static void cbmem_top_init_once(void) |
| { |
| /* Call one-time hook on expected cbmem init during boot. This sequence |
| assumes first init call is in romstage. */ |
| if (!ENV_ROMSTAGE) |
| return; |
| |
| /* The test is only effective on X86 and when address hits UC memory. */ |
| if (ENV_X86) |
| quick_ram_check_or_die((uintptr_t)cbmem_top() - sizeof(u32)); |
| } |
| |
| void cbmem_initialize_empty_id_size(u32 id, u64 size) |
| { |
| const int no_recovery = 0; |
| |
| cbmem_top_init_once(); |
| |
| 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); |
| } |
| |
| int cbmem_initialize(void) |
| { |
| return cbmem_initialize_id_size(0, 0); |
| } |
| |
| int cbmem_initialize_id_size(u32 id, u64 size) |
| { |
| const int recovery = 1; |
| |
| cbmem_top_init_once(); |
| |
| imd_handle_init(&imd, cbmem_top()); |
| |
| if (imd_recover(&imd)) |
| return 1; |
| |
| /* |
| * 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. |
| */ |
| if (ENV_ROMSTAGE) |
| imd_lockdown(&imd); |
| |
| /* Add the specified range first */ |
| if (size) |
| cbmem_add(id, size); |
| |
| /* Complete migration to CBMEM. */ |
| cbmem_run_init_hooks(recovery); |
| |
| /* Recovery successful. */ |
| return 0; |
| } |
| |
| int cbmem_recovery(int is_wakeup) |
| { |
| int rv = 0; |
| if (!is_wakeup) |
| cbmem_initialize_empty(); |
| else |
| rv = cbmem_initialize(); |
| return rv; |
| } |
| |
| const struct cbmem_entry *cbmem_entry_add(u32 id, u64 size64) |
| { |
| const struct imd_entry *e; |
| |
| e = imd_entry_find_or_add(&imd, id, size64); |
| |
| return imd_to_cbmem(e); |
| } |
| |
| void *cbmem_add(u32 id, u64 size) |
| { |
| const struct imd_entry *e; |
| |
| e = imd_entry_find_or_add(&imd, id, size); |
| |
| if (e == NULL) |
| return NULL; |
| |
| return imd_entry_at(&imd, e); |
| } |
| |
| /* Retrieve a region provided a given id. */ |
| const struct cbmem_entry *cbmem_entry_find(u32 id) |
| { |
| const struct imd_entry *e; |
| |
| e = imd_entry_find(&imd, id); |
| |
| return imd_to_cbmem(e); |
| } |
| |
| void *cbmem_find(u32 id) |
| { |
| const struct imd_entry *e; |
| |
| e = imd_entry_find(&imd, id); |
| |
| if (e == NULL) |
| return NULL; |
| |
| return imd_entry_at(&imd, e); |
| } |
| |
| /* Remove a reserved region. Returns 0 on success, < 0 on error. Note: A region |
| * cannot be removed unless it was the last one added. */ |
| int cbmem_entry_remove(const struct cbmem_entry *entry) |
| { |
| return imd_entry_remove(&imd, cbmem_to_imd(entry)); |
| } |
| |
| u64 cbmem_entry_size(const struct cbmem_entry *entry) |
| { |
| return imd_entry_size(&imd, cbmem_to_imd(entry)); |
| } |
| |
| void *cbmem_entry_start(const struct cbmem_entry *entry) |
| { |
| return imd_entry_at(&imd, cbmem_to_imd(entry)); |
| } |
| |
| void cbmem_add_bootmem(void) |
| { |
| void *baseptr = NULL; |
| size_t size = 0; |
| |
| cbmem_get_region(&baseptr, &size); |
| bootmem_add_range((uintptr_t)baseptr, size, BM_MEM_TABLE); |
| } |
| |
| void cbmem_get_region(void **baseptr, size_t *size) |
| { |
| imd_region_used(&imd, baseptr, size); |
| } |
| |
| #if ENV_PAYLOAD_LOADER || (CONFIG(EARLY_CBMEM_LIST) \ |
| && (ENV_POSTCAR || ENV_ROMSTAGE)) |
| /* |
| * -fdata-sections doesn't work so well on read only strings. They all |
| * get put in the same section even though those strings may never be |
| * referenced in the final binary. |
| */ |
| void cbmem_list(void) |
| { |
| static const struct imd_lookup lookup[] = { CBMEM_ID_TO_NAME_TABLE }; |
| |
| imd_print_entries(&imd, lookup, ARRAY_SIZE(lookup)); |
| } |
| #endif |
| |
| void cbmem_add_records_to_cbtable(struct lb_header *header) |
| { |
| struct imd_cursor cursor; |
| |
| if (imd_cursor_init(&imd, &cursor)) |
| return; |
| |
| while (1) { |
| const struct imd_entry *e; |
| struct lb_cbmem_entry *lbe; |
| uint32_t id; |
| |
| e = imd_cursor_next(&cursor); |
| |
| if (e == NULL) |
| break; |
| |
| id = imd_entry_id(&imd, e); |
| /* Don't add these metadata entries. */ |
| if (id == CBMEM_ID_IMD_ROOT || id == CBMEM_ID_IMD_SMALL) |
| continue; |
| |
| lbe = (struct lb_cbmem_entry *)lb_new_record(header); |
| lbe->tag = LB_TAG_CBMEM_ENTRY; |
| lbe->size = sizeof(*lbe); |
| lbe->address = (uintptr_t)imd_entry_at(&imd, e); |
| lbe->entry_size = imd_entry_size(&imd, e); |
| lbe->id = id; |
| } |
| } |