Aaron Durbin (adurbin@chromium.org) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/11757
-gerrit
commit a54e1416b1d48aa33722ff356d04cb4ae4945a01 Author: Aaron Durbin adurbin@chromium.org Date: Wed Sep 30 12:26:54 2015 -0500
cbmem: add coreboot table records for each cbmem entry
In order to not expose the cbmem data structures to usersland that are used by coreboot internally add each of the cbmem entries to a coreboot table record. The payload ABI uses coreboot tables so this just provides a shortcut for cbmem entries which were manually added previously by doing the work on behalf of all entries.
The imd code added a cursor structure and associated functions for walking the entries in order to be placed in the tables. Additionally a struct lb_cbmem_entry was added that lists the base address, size, and id of the cbmem entry.
BUG=chrome-os-partner:43731 BRANCH=None TEST=Booted glados. View coreboot table entries with cbmem.
Change-Id: I125940aa1898c3e99077ead0660eff8aa905b13b Signed-off-by: Aaron Durbin adurbin@chromium.org --- src/commonlib/include/commonlib/coreboot_tables.h | 13 +++++++ src/include/cbmem.h | 4 +-- src/include/imd.h | 16 +++++++++ src/lib/coreboot_table.c | 3 ++ src/lib/imd.c | 44 +++++++++++++++++++++++ src/lib/imd_cbmem.c | 43 ++++++++++++++++++++-- 6 files changed, 119 insertions(+), 4 deletions(-)
diff --git a/src/commonlib/include/commonlib/coreboot_tables.h b/src/commonlib/include/commonlib/coreboot_tables.h index 2ed4d7f..5e0c87c 100644 --- a/src/commonlib/include/commonlib/coreboot_tables.h +++ b/src/commonlib/include/commonlib/coreboot_tables.h @@ -308,6 +308,19 @@ struct lb_boot_media_params { uint64_t boot_media_size; };
+/* + * There can be more than one of these records as there is one per cbmem entry. + */ +#define LB_TAG_CBMEM_ENTRY 0x0031 +struct lb_cbmem_entry { + uint32_t tag; + uint32_t size; + + uint64_t address; + uint32_t entry_size; + uint32_t id; +}; + #define LB_TAG_SERIALNO 0x002a #define MAX_SERIALNO_LENGTH 32
diff --git a/src/include/cbmem.h b/src/include/cbmem.h index 60de5a7..b34cf06 100644 --- a/src/include/cbmem.h +++ b/src/include/cbmem.h @@ -41,6 +41,7 @@ #ifndef __ASSEMBLER__ #include <stddef.h> #include <stdint.h> +#include <boot/coreboot_tables.h>
struct cbmem_entry;
@@ -118,12 +119,11 @@ typedef void (* const cbmem_init_hook_t)(int is_recovery); void cbmem_run_init_hooks(int is_recovery); void cbmem_fail_resume(void);
-#ifndef __PRE_RAM__ /* Ramstage only functions. */ /* Add the cbmem memory used to the memory map at boot. */ void cbmem_add_bootmem(void); void cbmem_list(void); -#endif /* __PRE_RAM__ */ +void cbmem_add_records_to_cbtable(struct lb_header *header);
#if ENV_RAMSTAGE #define ROMSTAGE_CBMEM_INIT_HOOK(init_fn_) static cbmem_init_hook_t \ diff --git a/src/include/imd.h b/src/include/imd.h index a444b4f..f55820f 100644 --- a/src/include/imd.h +++ b/src/include/imd.h @@ -124,6 +124,9 @@ size_t imd_entry_size(const struct imd *imd, const struct imd_entry *entry); /* Returns pointer to region described by entry or NULL on failure. */ void *imd_entry_at(const struct imd *imd, const struct imd_entry *entry);
+/* Returns id for the imd entry. */ +uint32_t imd_entry_id(const struct imd *imd, const struct imd_entry *entry); + /* Attempt to remove entry from imd. */ int imd_entry_remove(const struct imd *imd, const struct imd_entry *entry);
@@ -136,6 +139,13 @@ struct imd_lookup { int imd_print_entries(const struct imd *imd, const struct imd_lookup *lookup, size_t size);
+struct imd_cursor; +/* Initialize a imd_cursor object to walk the IMD entries. */ +int imd_cursor_init(const struct imd *imd, struct imd_cursor *cursor); + +/* Retrive the next imd entry the cursor is referencing. Returns NULL when + * no more entries exist. */ +const struct imd_entry *imd_cursor_next(struct imd_cursor *cursor);
/* * The struct imd is a handle for working with an in-memory directory. @@ -152,4 +162,10 @@ struct imd { struct imdr sm; };
+struct imd_cursor { + size_t current_imdr; + size_t current_entry; + const struct imdr *imdr[2]; +}; + #endif /* _IMD_H_ */ diff --git a/src/lib/coreboot_table.c b/src/lib/coreboot_table.c index 6859bf2..1bd356d 100644 --- a/src/lib/coreboot_table.c +++ b/src/lib/coreboot_table.c @@ -517,6 +517,9 @@ unsigned long write_coreboot_table(
lb_boot_media_params(head);
+ /* Add all cbmem entries into the coreboot tables. */ + cbmem_add_records_to_cbtable(head); + /* Remember where my valid memory ranges are */ return lb_table_fini(head); } diff --git a/src/lib/imd.c b/src/lib/imd.c index 612e3f1..67a76a4 100644 --- a/src/lib/imd.c +++ b/src/lib/imd.c @@ -627,6 +627,11 @@ void *imd_entry_at(const struct imd *imd, const struct imd_entry *entry) return imdr_entry_at(imdr, entry); }
+uint32_t imd_entry_id(const struct imd *imd, const struct imd_entry *entry) +{ + return entry->id; +} + int imd_entry_remove(const struct imd *imd, const struct imd_entry *entry) { struct imd_root *r; @@ -702,3 +707,42 @@ int imd_print_entries(const struct imd *imd, const struct imd_lookup *lookup,
return 0; } + +int imd_cursor_init(const struct imd *imd, struct imd_cursor *cursor) +{ + if (imd == NULL || cursor == NULL) + return -1; + + memset(cursor, 0, sizeof(*cursor)); + + cursor->imdr[0] = &imd->lg; + cursor->imdr[1] = &imd->sm; + + return 0; +} + +const struct imd_entry *imd_cursor_next(struct imd_cursor *cursor) +{ + struct imd_root *r; + const struct imd_entry *e; + + if (cursor->current_imdr >= ARRAY_SIZE(cursor->imdr)) + return NULL; + + r = imdr_root(cursor->imdr[cursor->current_imdr]); + + if (r == NULL) + return NULL; + + if (cursor->current_entry >= r->num_entries) { + /* Try next imdr. */ + cursor->current_imdr++; + cursor->current_entry = 0; + return imd_cursor_next(cursor); + } + + e = &r->entries[cursor->current_entry]; + cursor->current_entry++; + + return e; +} diff --git a/src/lib/imd_cbmem.c b/src/lib/imd_cbmem.c index fa65334..d60acc9 100644 --- a/src/lib/imd_cbmem.c +++ b/src/lib/imd_cbmem.c @@ -267,7 +267,6 @@ void *cbmem_entry_start(const struct cbmem_entry *entry) return imd_entry_at(imd, cbmem_to_imd(entry)); }
-#if ENV_RAMSTAGE void cbmem_add_bootmem(void) { void *base = NULL; @@ -277,10 +276,50 @@ void cbmem_add_bootmem(void) bootmem_add_range((uintptr_t)base, size, LB_MEM_TABLE); }
+#if ENV_RAMSTAGE +/* + * -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(cbmem_get_imd(), lookup, ARRAY_SIZE(lookup)); } -#endif /* __PRE_RAM__ */ +#endif + +void cbmem_add_records_to_cbtable(struct lb_header *header) +{ + struct imd_cursor cursor; + struct imd *imd; + + imd = cbmem_get_imd(); + + 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; + } +}