diff options
Diffstat (limited to 'util/nvramtool')
| -rw-r--r-- | util/nvramtool/coreboot_tables.h | 8 | ||||
| -rw-r--r-- | util/nvramtool/lbtable.c | 38 |
2 files changed, 43 insertions, 3 deletions
diff --git a/util/nvramtool/coreboot_tables.h b/util/nvramtool/coreboot_tables.h index 7c912be0f7..afab7bcb88 100644 --- a/util/nvramtool/coreboot_tables.h +++ b/util/nvramtool/coreboot_tables.h @@ -146,6 +146,14 @@ struct lb_string { uint32_t size; uint8_t string[0]; }; +#define LB_TAG_SERIAL 0x000f +#define LB_TAG_CONSOLE 0x0010 +#define LB_TAG_FORWARD 0x0011 +struct lb_forward { + uint32_t tag; + uint32_t size; + uint64_t forward; +}; /* The following structures are for the cmos definitions table */ #define LB_TAG_CMOS_OPTION_TABLE 200 diff --git a/util/nvramtool/lbtable.c b/util/nvramtool/lbtable.c index 05d70c2929..f730314769 100644 --- a/util/nvramtool/lbtable.c +++ b/util/nvramtool/lbtable.c @@ -149,6 +149,8 @@ static const char nofound_msg_option_checksum[] = "%s: Item %s not found in coreboot table. Apparently, you are " "using coreboot v1.\n"; +int fd; + /* This is the number of items from the coreboot table that may be displayed * using the -l option. */ @@ -240,6 +242,7 @@ static const size_t BYTES_TO_MAP = (1024 * 1024); * /dev/mem. */ static const void *low_phys_mem; +static unsigned long low_phys_base = 0; /* Pointer to coreboot table. */ static const struct lb_header *lbtable = NULL; @@ -261,7 +264,7 @@ static const hexdump_format_t format = * /dev/mem. This macro converts 'vaddr' to a physical address. ****************************************************************************/ #define vtophys(vaddr) (((unsigned long) vaddr) - \ - ((unsigned long) low_phys_mem)) + ((unsigned long) low_phys_mem) + low_phys_base) /**************************************************************************** * phystov @@ -272,7 +275,7 @@ static const hexdump_format_t format = * by calling mmap() on /dev/mem. ****************************************************************************/ #define phystov(paddr) (((unsigned long) low_phys_mem) + \ - ((unsigned long) paddr)) + ((unsigned long) paddr) - low_phys_base) /**************************************************************************** * get_lbtable @@ -280,7 +283,7 @@ static const hexdump_format_t format = * Find the coreboot table and set global variable lbtable to point to it. ****************************************************************************/ void get_lbtable (void) - { int fd, i, bad_header_count, bad_table_count, bad_headers, bad_tables; + { int i, bad_header_count, bad_table_count, bad_headers, bad_tables; if (lbtable != NULL) return; @@ -494,6 +497,7 @@ static const struct lb_header * lbtable_scan (unsigned long start, int *bad_table_count) { static const char signature[] = { 'L', 'B', 'I', 'O' }; const struct lb_header *table; + const struct lb_forward *forward; const uint32_t *p; uint32_t sig; @@ -534,6 +538,25 @@ static const struct lb_header * lbtable_scan (unsigned long start, } /* checksums are ok: we found it! */ + /* But it may just be a forwarding table, so look if there's a forwarder */ + lbtable = table; + forward = (struct lb_forward *)find_lbrec(LB_TAG_FORWARD); + lbtable = NULL; + + if (forward) { + uint64_t new_phys = forward->forward; + + new_phys &= ~(getpagesize()-1); + + munmap((void *)low_phys_mem, BYTES_TO_MAP); + if ((low_phys_mem = mmap(NULL, BYTES_TO_MAP, PROT_READ, MAP_SHARED, fd, (off_t)new_phys)) == MAP_FAILED) + { fprintf(stderr, "%s: Failed to mmap /dev/mem: %s\n", prog_name, + strerror(errno)); + exit(1); + } + low_phys_base = new_phys; + table = lbtable_scan(phystov(low_phys_base), phystov(low_phys_base + BYTES_TO_MAP), bad_header_count, bad_table_count); + } return table; } @@ -865,6 +888,15 @@ static const char * lbrec_tag_to_str (uint32_t tag) case LB_TAG_ASSEMBLER: return "ASSEMBLER"; + case LB_TAG_SERIAL: + return "SERIAL"; + + case LB_TAG_CONSOLE: + return "CONSOLE"; + + case LB_TAG_FORWARD: + return "FORWARD"; + case LB_TAG_CMOS_OPTION_TABLE: return "CMOS_OPTION_TABLE"; |