/* SPDX-License-Identifier: GPL-2.0-only */ /* This file is part of the coreboot project. */ #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) { MAYBE_STATIC_BSS void *top = NULL; 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; } }