| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright 2012 Google Inc. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; version 2 of the License. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc. |
| */ |
| |
| #include <inttypes.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <unistd.h> |
| #include <inttypes.h> |
| #include <getopt.h> |
| #include <dirent.h> |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <ctype.h> |
| #include <arpa/inet.h> |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <sys/mman.h> |
| #include <libgen.h> |
| #include <assert.h> |
| |
| #ifdef __OpenBSD__ |
| #include <sys/param.h> |
| #include <sys/sysctl.h> |
| #endif |
| |
| #define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0])) |
| #define MAP_BYTES (1024*1024) |
| #define IS_ENABLED(x) (defined (x) && (x)) |
| |
| #include "boot/coreboot_tables.h" |
| |
| typedef uint8_t u8; |
| typedef uint16_t u16; |
| typedef uint32_t u32; |
| typedef uint64_t u64; |
| |
| #include "cbmem_id.h" |
| #include "timestamp.h" |
| |
| #define CBMEM_VERSION "1.1" |
| |
| /* verbose output? */ |
| static int verbose = 0; |
| #define debug(x...) if(verbose) printf(x) |
| |
| /* File handle used to access /dev/mem */ |
| static int mem_fd; |
| |
| /* IMD root pointer location */ |
| static uint64_t rootptr = 0; |
| |
| /* |
| * calculate ip checksum (16 bit quantities) on a passed in buffer. In case |
| * the buffer length is odd last byte is excluded from the calculation |
| */ |
| static u16 ipchcksum(const void *addr, unsigned size) |
| { |
| const u16 *p = addr; |
| unsigned i, n = size / 2; /* don't expect odd sized blocks */ |
| u32 sum = 0; |
| |
| for (i = 0; i < n; i++) |
| sum += p[i]; |
| |
| sum = (sum >> 16) + (sum & 0xffff); |
| sum += (sum >> 16); |
| sum = ~sum & 0xffff; |
| return (u16) sum; |
| } |
| |
| /* |
| * Functions to map / unmap physical memory into virtual address space. These |
| * functions always maps 1MB at a time and can only map one area at once. |
| */ |
| static void *mapped_virtual; |
| static size_t mapped_size; |
| |
| static inline size_t size_to_mib(size_t sz) |
| { |
| return sz >> 20; |
| } |
| |
| static void unmap_memory(void) |
| { |
| if (mapped_virtual == NULL) { |
| fprintf(stderr, "Error unmapping memory\n"); |
| return; |
| } |
| if (size_to_mib(mapped_size) == 0) { |
| debug("Unmapping %zuMB of virtual memory at %p.\n", |
| size_to_mib(mapped_size), mapped_virtual); |
| } |
| else { |
| debug("Unmapping %zuMB of virtual memory at %p.\n", |
| size_to_mib(mapped_size), mapped_virtual); |
| } |
| munmap(mapped_virtual, mapped_size); |
| mapped_virtual = NULL; |
| mapped_size = 0; |
| } |
| |
| static void *map_memory_size(u64 physical, size_t size) |
| { |
| void *v; |
| off_t p; |
| u64 page = getpagesize(); |
| size_t padding; |
| |
| if (mapped_virtual != NULL) |
| unmap_memory(); |
| |
| /* Mapped memory must be aligned to page size */ |
| p = physical & ~(page - 1); |
| padding = physical & (page-1); |
| size += padding; |
| |
| if (size_to_mib(size) == 0) { |
| debug("Mapping %zuB of physical memory at 0x%jx (requested 0x%jx).\n", |
| size, (intmax_t)p, (intmax_t)physical); |
| } |
| else { |
| debug("Mapping %zuMB of physical memory at 0x%jx (requested 0x%jx).\n", |
| size_to_mib(size), (intmax_t)p, (intmax_t)physical); |
| } |
| |
| v = mmap(NULL, size, PROT_READ, MAP_SHARED, mem_fd, p); |
| |
| if (v == MAP_FAILED) { |
| /* The mapped area may have overrun the upper cbmem boundary when trying to |
| * align to the page size. Try growing down instead of up... |
| */ |
| p -= page; |
| padding += page; |
| size &= ~(page - 1); |
| size = size + (page - 1); |
| v = mmap(NULL, size, PROT_READ, MAP_SHARED, mem_fd, p); |
| debug(" ... failed. Mapping %zuB of physical memory at 0x%jx.\n", |
| size, (intmax_t)p); |
| } |
| |
| if (v == MAP_FAILED) { |
| fprintf(stderr, "Failed to mmap /dev/mem: %s\n", |
| strerror(errno)); |
| exit(1); |
| } |
| |
| /* Remember what we actually mapped ... */ |
| mapped_virtual = v; |
| mapped_size = size; |
| |
| /* ... but return address to the physical memory that was requested */ |
| if (padding) |
| debug(" ... padding virtual address with 0x%zx bytes.\n", |
| padding); |
| v += padding; |
| |
| return v; |
| } |
| |
| static void *map_memory(u64 physical) |
| { |
| return map_memory_size(physical, MAP_BYTES); |
| } |
| |
| /* |
| * Try finding the timestamp table and coreboot cbmem console starting from the |
| * passed in memory offset. Could be called recursively in case a forwarding |
| * entry is found. |
| * |
| * Returns pointer to a memory buffer containg the timestamp table or zero if |
| * none found. |
| */ |
| |
| static struct lb_cbmem_ref timestamps; |
| static struct lb_cbmem_ref console; |
| static struct lb_memory_range cbmem; |
| |
| /* This is a work-around for a nasty problem introduced by initially having |
| * pointer sized entries in the lb_cbmem_ref structures. This caused problems |
| * on 64bit x86 systems because coreboot is 32bit on those systems. |
| * When the problem was found, it was corrected, but there are a lot of |
| * systems out there with a firmware that does not produce the right |
| * lb_cbmem_ref structure. Hence we try to autocorrect this issue here. |
| */ |
| static struct lb_cbmem_ref parse_cbmem_ref(struct lb_cbmem_ref *cbmem_ref) |
| { |
| struct lb_cbmem_ref ret; |
| |
| ret = *cbmem_ref; |
| |
| if (cbmem_ref->size < sizeof(*cbmem_ref)) |
| ret.cbmem_addr = (uint32_t)ret.cbmem_addr; |
| |
| debug(" cbmem_addr = %" PRIx64 "\n", ret.cbmem_addr); |
| |
| return ret; |
| } |
| |
| static int parse_cbtable(u64 address, size_t table_size) |
| { |
| int i, found = 0; |
| void *buf; |
| |
| debug("Looking for coreboot table at %" PRIx64 " %zd bytes.\n", |
| address, table_size); |
| buf = map_memory_size(address, table_size); |
| |
| /* look at every 16 bytes within 4K of the base */ |
| |
| for (i = 0; i < 0x1000; i += 0x10) { |
| struct lb_header *lbh; |
| struct lb_record* lbr_p; |
| void *lbtable; |
| int j; |
| |
| lbh = (struct lb_header *)(buf + i); |
| if (memcmp(lbh->signature, "LBIO", sizeof(lbh->signature)) || |
| !lbh->header_bytes || |
| ipchcksum(lbh, sizeof(*lbh))) { |
| continue; |
| } |
| lbtable = buf + i + lbh->header_bytes; |
| |
| if (ipchcksum(lbtable, lbh->table_bytes) != |
| lbh->table_checksum) { |
| debug("Signature found, but wrong checksum.\n"); |
| continue; |
| } |
| |
| found = 1; |
| debug("Found!\n"); |
| |
| for (j = 0; j < lbh->table_bytes; j += lbr_p->size) { |
| lbr_p = (struct lb_record*) ((char *)lbtable + j); |
| debug(" coreboot table entry 0x%02x\n", lbr_p->tag); |
| switch (lbr_p->tag) { |
| case LB_TAG_MEMORY: { |
| int i = 0; |
| debug(" Found memory map.\n"); |
| struct lb_memory *memory = |
| (struct lb_memory *)lbr_p; |
| while ((char *)&memory->map[i] < ((char *)lbr_p |
| + lbr_p->size)) { |
| if (memory->map[i].type == LB_MEM_TABLE) { |
| debug(" LB_MEM_TABLE found.\n"); |
| /* The last one found is CBMEM */ |
| cbmem = memory->map[i]; |
| } |
| i++; |
| } |
| continue; |
| } |
| case LB_TAG_TIMESTAMPS: { |
| debug(" Found timestamp table.\n"); |
| timestamps = parse_cbmem_ref((struct lb_cbmem_ref *) lbr_p); |
| continue; |
| } |
| case LB_TAG_CBMEM_CONSOLE: { |
| debug(" Found cbmem console.\n"); |
| console = parse_cbmem_ref((struct lb_cbmem_ref *) lbr_p); |
| continue; |
| } |
| case LB_TAG_FORWARD: { |
| /* |
| * This is a forwarding entry - repeat the |
| * search at the new address. |
| */ |
| struct lb_forward lbf_p = |
| *(struct lb_forward *) lbr_p; |
| debug(" Found forwarding entry.\n"); |
| unmap_memory(); |
| return parse_cbtable(lbf_p.forward, table_size); |
| } |
| default: |
| break; |
| } |
| |
| } |
| } |
| unmap_memory(); |
| |
| return found; |
| } |
| |
| #if defined(linux) && (defined(__i386__) || defined(__x86_64__)) |
| /* |
| * read CPU frequency from a sysfs file, return an frequency in Kilohertz as |
| * an int or exit on any error. |
| */ |
| static unsigned long arch_tick_frequency(void) |
| { |
| FILE *cpuf; |
| char freqs[100]; |
| int size; |
| char *endp; |
| u64 rv; |
| |
| const char* freq_file = |
| "/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq"; |
| |
| cpuf = fopen(freq_file, "r"); |
| if (!cpuf) { |
| fprintf(stderr, "Could not open %s: %s\n", |
| freq_file, strerror(errno)); |
| exit(1); |
| } |
| |
| memset(freqs, 0, sizeof(freqs)); |
| size = fread(freqs, 1, sizeof(freqs), cpuf); |
| if (!size || (size == sizeof(freqs))) { |
| fprintf(stderr, "Wrong number of bytes(%d) read from %s\n", |
| size, freq_file); |
| exit(1); |
| } |
| fclose(cpuf); |
| rv = strtoull(freqs, &endp, 10); |
| |
| if (*endp == '\0' || *endp == '\n') |
| return rv; |
| fprintf(stderr, "Wrong formatted value ^%s^ read from %s\n", |
| freqs, freq_file); |
| exit(1); |
| } |
| #elif defined(__OpenBSD__) && (defined(__i386__) || defined(__x86_64__)) |
| static unsigned long arch_tick_frequency(void) |
| { |
| int mib[2] = { CTL_HW, HW_CPUSPEED }; |
| static int value = 0; |
| size_t value_len = sizeof(value); |
| |
| /* Return 1 MHz when sysctl fails. */ |
| if ((value == 0) && (sysctl(mib, 2, &value, &value_len, NULL, 0) == -1)) |
| return 1; |
| |
| return value; |
| } |
| #else |
| static unsigned long arch_tick_frequency(void) |
| { |
| /* 1 MHz = 1us. */ |
| return 1; |
| } |
| #endif |
| |
| static unsigned long tick_freq_mhz; |
| |
| static void timestamp_set_tick_freq(unsigned long table_tick_freq_mhz) |
| { |
| tick_freq_mhz = table_tick_freq_mhz; |
| |
| /* Honor table frequency. */ |
| if (tick_freq_mhz) |
| return; |
| |
| tick_freq_mhz = arch_tick_frequency(); |
| |
| if (!tick_freq_mhz) { |
| fprintf(stderr, "Cannot determine timestamp tick frequency.\n"); |
| exit(1); |
| } |
| } |
| |
| u64 arch_convert_raw_ts_entry(u64 ts) |
| { |
| return ts / tick_freq_mhz; |
| } |
| |
| /* |
| * Print an integer in 'normalized' form - with commas separating every three |
| * decimal orders. |
| */ |
| static void print_norm(u64 v) |
| { |
| if (v >= 1000) { |
| /* print the higher order sections first */ |
| print_norm(v / 1000); |
| printf(",%3.3u", (u32)(v % 1000)); |
| } else { |
| printf("%u", (u32)(v % 1000)); |
| } |
| } |
| |
| enum additional_timestamp_id { |
| // Depthcharge entry IDs start at 1000. |
| TS_DC_START = 1000, |
| |
| TS_RO_PARAMS_INIT = 1001, |
| TS_RO_VB_INIT = 1002, |
| TS_RO_VB_SELECT_FIRMWARE = 1003, |
| TS_RO_VB_SELECT_AND_LOAD_KERNEL = 1004, |
| |
| TS_RW_VB_SELECT_AND_LOAD_KERNEL = 1010, |
| |
| TS_VB_SELECT_AND_LOAD_KERNEL = 1020, |
| |
| TS_CROSSYSTEM_DATA = 1100, |
| TS_START_KERNEL = 1101 |
| }; |
| |
| static const struct timestamp_id_to_name { |
| u32 id; |
| const char *name; |
| } timestamp_ids[] = { |
| /* Marker to report base_time. */ |
| { 0, "1st timestamp" }, |
| { TS_START_ROMSTAGE, "start of rom stage" }, |
| { TS_BEFORE_INITRAM, "before ram initialization" }, |
| { TS_AFTER_INITRAM, "after ram initialization" }, |
| { TS_END_ROMSTAGE, "end of romstage" }, |
| { TS_START_VBOOT, "start of verified boot" }, |
| { TS_END_VBOOT, "end of verified boot" }, |
| { TS_START_COPYRAM, "starting to load ramstage" }, |
| { TS_END_COPYRAM, "finished loading ramstage" }, |
| { TS_START_RAMSTAGE, "start of ramstage" }, |
| { TS_START_BOOTBLOCK, "start of bootblock" }, |
| { TS_END_BOOTBLOCK, "end of bootblock" }, |
| { TS_START_COPYROM, "starting to load romstage" }, |
| { TS_END_COPYROM, "finished loading romstage" }, |
| { TS_START_ULZMA, "starting LZMA decompress (ignore for x86)" }, |
| { TS_END_ULZMA, "finished LZMA decompress (ignore for x86)" }, |
| { TS_DEVICE_ENUMERATE, "device enumeration" }, |
| { TS_DEVICE_CONFIGURE, "device configuration" }, |
| { TS_DEVICE_ENABLE, "device enable" }, |
| { TS_DEVICE_INITIALIZE, "device initialization" }, |
| { TS_DEVICE_DONE, "device setup done" }, |
| { TS_CBMEM_POST, "cbmem post" }, |
| { TS_WRITE_TABLES, "write tables" }, |
| { TS_LOAD_PAYLOAD, "load payload" }, |
| { TS_ACPI_WAKE_JUMP, "ACPI wake jump" }, |
| { TS_SELFBOOT_JUMP, "selfboot jump" }, |
| |
| { TS_START_COPYVER, "starting to load verstage" }, |
| { TS_END_COPYVER, "finished loading verstage" }, |
| { TS_START_TPMINIT, "starting to initialize TPM" }, |
| { TS_END_TPMINIT, "finished TPM initialization" }, |
| { TS_START_VERIFY_SLOT, "starting to verify keyblock/preamble (RSA)" }, |
| { TS_END_VERIFY_SLOT, "finished verifying keyblock/preamble (RSA)" }, |
| { TS_START_HASH_BODY, "starting to verify body (load+SHA2+RSA) " }, |
| { TS_DONE_LOADING, "finished loading body (ignore for x86)" }, |
| { TS_DONE_HASHING, "finished calculating body hash (SHA2)" }, |
| { TS_END_HASH_BODY, "finished verifying body signature (RSA)" }, |
| |
| { TS_DC_START, "depthcharge start" }, |
| { TS_RO_PARAMS_INIT, "RO parameter init" }, |
| { TS_RO_VB_INIT, "RO vboot init" }, |
| { TS_RO_VB_SELECT_FIRMWARE, "RO vboot select firmware" }, |
| { TS_RO_VB_SELECT_AND_LOAD_KERNEL, "RO vboot select&load kernel" }, |
| { TS_RW_VB_SELECT_AND_LOAD_KERNEL, "RW vboot select&load kernel" }, |
| { TS_VB_SELECT_AND_LOAD_KERNEL, "vboot select&load kernel" }, |
| { TS_CROSSYSTEM_DATA, "crossystem data" }, |
| { TS_START_KERNEL, "start kernel" }, |
| |
| /* FSP related timestamps */ |
| { TS_FSP_MEMORY_INIT_START, "calling FspMemoryInit" }, |
| { TS_FSP_MEMORY_INIT_END, "returning from FspMemoryInit" }, |
| { TS_FSP_TEMP_RAM_EXIT_START, "calling FspTempRamExit" }, |
| { TS_FSP_TEMP_RAM_EXIT_END, "returning from FspTempRamExit" }, |
| { TS_FSP_SILICON_INIT_START, "calling FspSiliconInit" }, |
| { TS_FSP_SILICON_INIT_END, "returning from FspSiliconInit" }, |
| { TS_FSP_BEFORE_ENUMERATE, "calling FspNotify(AfterPciEnumeration)" }, |
| { TS_FSP_AFTER_ENUMERATE, |
| "returning from FspNotify(AfterPciEnumeration)" }, |
| { TS_FSP_BEFORE_FINALIZE, "calling FspNotify(ReadyToBoot)" }, |
| { TS_FSP_AFTER_FINALIZE, "returning from FspNotify(ReadyToBoot)" } |
| }; |
| |
| static const char *timestamp_name(uint32_t id) |
| { |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(timestamp_ids); i++) { |
| if (timestamp_ids[i].id == id) |
| return timestamp_ids[i].name; |
| } |
| return "<unknown>"; |
| } |
| |
| static uint64_t timestamp_print_parseable_entry(uint32_t id, uint64_t stamp, |
| uint64_t prev_stamp) |
| { |
| const char *name; |
| uint64_t step_time; |
| |
| name = timestamp_name(id); |
| |
| step_time = arch_convert_raw_ts_entry(stamp - prev_stamp); |
| |
| /* ID<tab>absolute time<tab>relative time<tab>description */ |
| printf("%d\t", id); |
| printf("%llu\t", (long long)arch_convert_raw_ts_entry(stamp)); |
| printf("%llu\t", (long long)step_time); |
| printf("%s\n", name); |
| |
| return step_time; |
| } |
| |
| uint64_t timestamp_print_entry(uint32_t id, uint64_t stamp, uint64_t prev_stamp) |
| { |
| const char *name; |
| uint64_t step_time; |
| |
| name = timestamp_name(id); |
| |
| printf("%4d:", id); |
| printf("%-50s", name); |
| print_norm(arch_convert_raw_ts_entry(stamp)); |
| step_time = arch_convert_raw_ts_entry(stamp - prev_stamp); |
| if (prev_stamp) { |
| printf(" ("); |
| print_norm(step_time); |
| printf(")"); |
| } |
| printf("\n"); |
| |
| return step_time; |
| } |
| |
| /* dump the timestamp table */ |
| static void dump_timestamps(int mach_readable) |
| { |
| int i; |
| struct timestamp_table *tst_p; |
| size_t size; |
| uint64_t prev_stamp; |
| uint64_t total_time; |
| |
| if (timestamps.tag != LB_TAG_TIMESTAMPS) { |
| fprintf(stderr, "No timestamps found in coreboot table.\n"); |
| return; |
| } |
| |
| size = sizeof(*tst_p); |
| tst_p = map_memory_size((unsigned long)timestamps.cbmem_addr, size); |
| |
| timestamp_set_tick_freq(tst_p->tick_freq_mhz); |
| |
| if (!mach_readable) |
| printf("%d entries total:\n\n", tst_p->num_entries); |
| size += tst_p->num_entries * sizeof(tst_p->entries[0]); |
| |
| unmap_memory(); |
| tst_p = map_memory_size((unsigned long)timestamps.cbmem_addr, size); |
| |
| /* Report the base time within the table. */ |
| prev_stamp = 0; |
| if (mach_readable) |
| timestamp_print_parseable_entry(0, tst_p->base_time, |
| prev_stamp); |
| else |
| timestamp_print_entry(0, tst_p->base_time, prev_stamp); |
| prev_stamp = tst_p->base_time; |
| |
| total_time = 0; |
| for (i = 0; i < tst_p->num_entries; i++) { |
| uint64_t stamp; |
| const struct timestamp_entry *tse = &tst_p->entries[i]; |
| |
| /* Make all timestamps absolute. */ |
| stamp = tse->entry_stamp + tst_p->base_time; |
| if (mach_readable) |
| total_time += |
| timestamp_print_parseable_entry(tse->entry_id, |
| stamp, prev_stamp); |
| else |
| total_time += timestamp_print_entry(tse->entry_id, |
| stamp, prev_stamp); |
| prev_stamp = stamp; |
| } |
| |
| if (!mach_readable) { |
| printf("\nTotal Time: "); |
| print_norm(total_time); |
| printf("\n"); |
| } |
| |
| unmap_memory(); |
| } |
| |
| /* dump the cbmem console */ |
| static void dump_console(void) |
| { |
| void *console_p; |
| char *console_c; |
| uint32_t size; |
| uint32_t cursor; |
| |
| if (console.tag != LB_TAG_CBMEM_CONSOLE) { |
| fprintf(stderr, "No console found in coreboot table.\n"); |
| return; |
| } |
| |
| console_p = map_memory_size((unsigned long)console.cbmem_addr, |
| 2 * sizeof(uint32_t)); |
| /* The in-memory format of the console area is: |
| * u32 size |
| * u32 cursor |
| * char console[size] |
| * Hence we have to add 8 to get to the actual console string. |
| */ |
| size = ((uint32_t *)console_p)[0]; |
| cursor = ((uint32_t *)console_p)[1]; |
| /* Cursor continues to go on even after no more data fits in |
| * the buffer but the data is dropped in this case. |
| */ |
| if (size > cursor) |
| size = cursor; |
| console_c = malloc(size + 1); |
| unmap_memory(); |
| if (!console_c) { |
| fprintf(stderr, "Not enough memory for console.\n"); |
| exit(1); |
| } |
| |
| console_p = map_memory_size((unsigned long)console.cbmem_addr, |
| size + sizeof(size) + sizeof(cursor)); |
| memcpy(console_c, console_p + 8, size); |
| console_c[size] = 0; |
| console_c[cursor] = 0; |
| |
| printf("%s\n", console_c); |
| if (size < cursor) |
| printf("%d %s lost\n", cursor - size, |
| (cursor - size) == 1 ? "byte":"bytes"); |
| |
| free(console_c); |
| |
| unmap_memory(); |
| } |
| |
| static void hexdump(unsigned long memory, int length) |
| { |
| int i; |
| uint8_t *m; |
| int all_zero = 0; |
| |
| m = map_memory_size((intptr_t)memory, length); |
| |
| if (length > MAP_BYTES) { |
| printf("Truncating hex dump from %d to %d bytes\n\n", |
| length, MAP_BYTES); |
| length = MAP_BYTES; |
| } |
| |
| for (i = 0; i < length; i += 16) { |
| int j; |
| |
| all_zero++; |
| for (j = 0; j < 16; j++) { |
| if(m[i+j] != 0) { |
| all_zero = 0; |
| break; |
| } |
| } |
| |
| if (all_zero < 2) { |
| printf("%08lx:", memory + i); |
| for (j = 0; j < 16; j++) |
| printf(" %02x", m[i+j]); |
| printf(" "); |
| for (j = 0; j < 16; j++) |
| printf("%c", isprint(m[i+j]) ? m[i+j] : '.'); |
| printf("\n"); |
| } else if (all_zero == 2) { |
| printf("...\n"); |
| } |
| } |
| |
| unmap_memory(); |
| } |
| |
| static void dump_cbmem_hex(void) |
| { |
| if (cbmem.type != LB_MEM_TABLE) { |
| fprintf(stderr, "No coreboot CBMEM area found!\n"); |
| return; |
| } |
| |
| hexdump(unpack_lb64(cbmem.start), unpack_lb64(cbmem.size)); |
| } |
| |
| /* The root region is at least DYN_CBMEM_ALIGN_SIZE . */ |
| #define DYN_CBMEM_ALIGN_SIZE (4096) |
| #define ROOT_MIN_SIZE DYN_CBMEM_ALIGN_SIZE |
| #define CBMEM_POINTER_MAGIC 0xc0389481 |
| #define CBMEM_ENTRY_MAGIC ~(CBMEM_POINTER_MAGIC) |
| |
| struct cbmem_root_pointer { |
| uint32_t magic; |
| /* Relative to upper limit/offset. */ |
| int32_t root_offset; |
| } __attribute__((packed)); |
| |
| struct dynamic_cbmem_entry { |
| uint32_t magic; |
| int32_t start_offset; |
| uint32_t size; |
| uint32_t id; |
| } __attribute__((packed)); |
| |
| struct cbmem_root { |
| uint32_t max_entries; |
| uint32_t num_entries; |
| uint32_t flags; |
| uint32_t entry_align; |
| int32_t max_offset; |
| struct dynamic_cbmem_entry entries[0]; |
| } __attribute__((packed)); |
| |
| #define CBMEM_MAGIC 0x434f5245 |
| #define MAX_CBMEM_ENTRIES 16 |
| |
| struct cbmem_entry { |
| uint32_t magic; |
| uint32_t id; |
| uint64_t base; |
| uint64_t size; |
| } __attribute__((packed)); |
| |
| struct cbmem_id_to_name { |
| uint32_t id; |
| const char *name; |
| }; |
| static const struct cbmem_id_to_name cbmem_ids[] = { CBMEM_ID_TO_NAME_TABLE }; |
| |
| void cbmem_print_entry(int n, uint32_t id, uint64_t base, uint64_t size) |
| { |
| int i; |
| const char *name; |
| |
| name = NULL; |
| for (i = 0; i < ARRAY_SIZE(cbmem_ids); i++) { |
| if (cbmem_ids[i].id == id) { |
| name = cbmem_ids[i].name; |
| break; |
| } |
| } |
| |
| printf("%2d. ", n); |
| if (name == NULL) |
| printf("%08x ", id); |
| else |
| printf("%s", name); |
| printf(" %08" PRIx64 " ", base); |
| printf(" %08" PRIx64 "\n", size); |
| } |
| |
| static void dump_static_cbmem_toc(struct cbmem_entry *entries) |
| { |
| int i; |
| |
| printf("CBMEM table of contents:\n"); |
| printf(" ID START LENGTH\n"); |
| |
| for (i=0; i<MAX_CBMEM_ENTRIES; i++) { |
| if (entries[i].magic != CBMEM_MAGIC) |
| break; |
| cbmem_print_entry(i, entries[i].id, |
| entries[i].base, entries[i].size); |
| } |
| } |
| |
| static void dump_dynamic_cbmem_toc(struct cbmem_root *root) |
| { |
| int i; |
| debug("CBMEM: max_entries=%d num_entries=%d flags=0x%x, entry_align=0x%x, max_offset=%d\n\n", |
| root->max_entries, root->num_entries, root->flags, root->entry_align, root->max_offset); |
| |
| printf("CBMEM table of contents:\n"); |
| printf(" ID START LENGTH\n"); |
| |
| for (i = 0; i < root->num_entries; i++) { |
| if(root->entries[i].magic != CBMEM_ENTRY_MAGIC) |
| break; |
| cbmem_print_entry(i, root->entries[i].id, |
| rootptr + root->entries[i].start_offset, root->entries[i].size); |
| } |
| } |
| |
| static void dump_cbmem_toc(void) |
| { |
| uint64_t start; |
| void *cbmem_area; |
| struct cbmem_entry *entries; |
| |
| if (cbmem.type != LB_MEM_TABLE) { |
| fprintf(stderr, "No coreboot CBMEM area found!\n"); |
| return; |
| } |
| |
| start = unpack_lb64(cbmem.start); |
| |
| cbmem_area = map_memory_size(start, unpack_lb64(cbmem.size)); |
| entries = (struct cbmem_entry *)cbmem_area; |
| |
| if (entries[0].magic == CBMEM_MAGIC) { |
| dump_static_cbmem_toc(entries); |
| } else { |
| rootptr = unpack_lb64(cbmem.start) + unpack_lb64(cbmem.size); |
| rootptr &= ~(DYN_CBMEM_ALIGN_SIZE - 1); |
| rootptr -= sizeof(struct cbmem_root_pointer); |
| unmap_memory(); |
| struct cbmem_root_pointer *r = |
| map_memory_size(rootptr, sizeof(*r)); |
| if (r->magic == CBMEM_POINTER_MAGIC) { |
| struct cbmem_root *root; |
| uint64_t rootaddr = rootptr + r->root_offset; |
| unmap_memory(); |
| root = map_memory_size(rootaddr, ROOT_MIN_SIZE); |
| dump_dynamic_cbmem_toc(root); |
| } else |
| fprintf(stderr, "No valid coreboot CBMEM root pointer found.\n"); |
| } |
| |
| unmap_memory(); |
| } |
| |
| #define COVERAGE_MAGIC 0x584d4153 |
| struct file { |
| uint32_t magic; |
| uint32_t next; |
| uint32_t filename; |
| uint32_t data; |
| int offset; |
| int len; |
| }; |
| |
| static int mkpath(char *path, mode_t mode) |
| { |
| assert (path && *path); |
| char *p; |
| for (p = strchr(path+1, '/'); p; p = strchr(p + 1, '/')) { |
| *p = '\0'; |
| if (mkdir(path, mode) == -1) { |
| if (errno != EEXIST) { |
| *p = '/'; |
| return -1; |
| } |
| } |
| *p = '/'; |
| } |
| return 0; |
| } |
| |
| static void dump_coverage(void) |
| { |
| int i, found = 0; |
| uint64_t start; |
| struct cbmem_entry *entries; |
| void *coverage; |
| unsigned long phys_offset; |
| #define phys_to_virt(x) ((void *)(unsigned long)(x) + phys_offset) |
| |
| if (cbmem.type != LB_MEM_TABLE) { |
| fprintf(stderr, "No coreboot table area found!\n"); |
| return; |
| } |
| |
| start = unpack_lb64(cbmem.start); |
| |
| entries = (struct cbmem_entry *)map_memory(start); |
| |
| for (i=0; i<MAX_CBMEM_ENTRIES; i++) { |
| if (entries[i].magic != CBMEM_MAGIC) |
| break; |
| if (entries[i].id == CBMEM_ID_COVERAGE) { |
| found = 1; |
| break; |
| } |
| } |
| |
| if (!found) { |
| unmap_memory(); |
| fprintf(stderr, "No coverage information found in" |
| " CBMEM area.\n"); |
| return; |
| } |
| |
| start = entries[i].base; |
| unmap_memory(); |
| /* Map coverage area */ |
| coverage = map_memory(start); |
| phys_offset = (unsigned long)coverage - (unsigned long)start; |
| |
| printf("Dumping coverage data...\n"); |
| |
| struct file *file = (struct file *)coverage; |
| while (file && file->magic == COVERAGE_MAGIC) { |
| FILE *f; |
| char *filename; |
| |
| debug(" -> %s\n", (char *)phys_to_virt(file->filename)); |
| filename = strdup((char *)phys_to_virt(file->filename)); |
| if (mkpath(filename, 0755) == -1) { |
| perror("Directory for coverage data could " |
| "not be created"); |
| exit(1); |
| } |
| f = fopen(filename, "wb"); |
| if (!f) { |
| printf("Could not open %s: %s\n", |
| filename, strerror(errno)); |
| exit(1); |
| } |
| if (fwrite((void *)phys_to_virt(file->data), |
| file->len, 1, f) != 1) { |
| printf("Could not write to %s: %s\n", |
| filename, strerror(errno)); |
| exit(1); |
| } |
| fclose(f); |
| free(filename); |
| |
| if (file->next) |
| file = (struct file *)phys_to_virt(file->next); |
| else |
| file = NULL; |
| } |
| unmap_memory(); |
| } |
| |
| static void print_version(void) |
| { |
| printf("cbmem v%s -- ", CBMEM_VERSION); |
| printf("Copyright (C) 2012 The ChromiumOS Authors. All rights reserved.\n\n"); |
| printf( |
| "This program is free software: you can redistribute it and/or modify\n" |
| "it under the terms of the GNU General Public License as published by\n" |
| "the Free Software Foundation, version 2 of the License.\n\n" |
| "This program is distributed in the hope that it will be useful,\n" |
| "but WITHOUT ANY WARRANTY; without even the implied warranty of\n" |
| "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n" |
| "GNU General Public License for more details.\n\n" |
| "You should have received a copy of the GNU General Public License\n" |
| "along with this program. If not, see <http://www.gnu.org/licenses/>.\n\n"); |
| } |
| |
| static void print_usage(const char *name) |
| { |
| printf("usage: %s [-cCltTxVvh?]\n", name); |
| printf("\n" |
| " -c | --console: print cbmem console\n" |
| " -C | --coverage: dump coverage information\n" |
| " -l | --list: print cbmem table of contents\n" |
| " -x | --hexdump: print hexdump of cbmem area\n" |
| " -t | --timestamps: print timestamp information\n" |
| " -T | --parseable-timestamps: print parseable timestamps\n" |
| " -V | --verbose: verbose (debugging) output\n" |
| " -v | --version: print the version\n" |
| " -h | --help: print this help\n" |
| "\n"); |
| exit(1); |
| } |
| |
| #ifdef __arm__ |
| static void dt_update_cells(const char *name, int *addr_cells_ptr, |
| int *size_cells_ptr) |
| { |
| if (*addr_cells_ptr >= 0 && *size_cells_ptr >= 0) |
| return; |
| |
| int buffer; |
| size_t nlen = strlen(name); |
| char *prop = alloca(nlen + sizeof("/#address-cells")); |
| strcpy(prop, name); |
| |
| if (*addr_cells_ptr < 0) { |
| strcpy(prop + nlen, "/#address-cells"); |
| int fd = open(prop, O_RDONLY); |
| if (fd < 0 && errno != ENOENT) { |
| perror(prop); |
| } else if (fd >= 0) { |
| if (read(fd, &buffer, sizeof(int)) < 0) |
| perror(prop); |
| else |
| *addr_cells_ptr = ntohl(buffer); |
| close(fd); |
| } |
| } |
| |
| if (*size_cells_ptr < 0) { |
| strcpy(prop + nlen, "/#size-cells"); |
| int fd = open(prop, O_RDONLY); |
| if (fd < 0 && errno != ENOENT) { |
| perror(prop); |
| } else if (fd >= 0) { |
| if (read(fd, &buffer, sizeof(int)) < 0) |
| perror(prop); |
| else |
| *size_cells_ptr = ntohl(buffer); |
| close(fd); |
| } |
| } |
| } |
| |
| static char *dt_find_compat(const char *parent, const char *compat, |
| int *addr_cells_ptr, int *size_cells_ptr) |
| { |
| char *ret = NULL; |
| struct dirent *entry; |
| DIR *dir; |
| |
| if (!(dir = opendir(parent))) { |
| perror(parent); |
| return NULL; |
| } |
| |
| /* Loop through all files in the directory (DT node). */ |
| while ((entry = readdir(dir))) { |
| /* We only care about compatible props or subnodes. */ |
| if (entry->d_name[0] == '.' || !((entry->d_type & DT_DIR) || |
| !strcmp(entry->d_name, "compatible"))) |
| continue; |
| |
| /* Assemble the file name (on the stack, for speed). */ |
| size_t plen = strlen(parent); |
| char *name = alloca(plen + strlen(entry->d_name) + 2); |
| |
| strcpy(name, parent); |
| name[plen] = '/'; |
| strcpy(name + plen + 1, entry->d_name); |
| |
| /* If it's a subnode, recurse. */ |
| if (entry->d_type & DT_DIR) { |
| ret = dt_find_compat(name, compat, addr_cells_ptr, |
| size_cells_ptr); |
| |
| /* There is only one matching node to find, abort. */ |
| if (ret) { |
| /* Gather cells values on the way up. */ |
| dt_update_cells(parent, addr_cells_ptr, |
| size_cells_ptr); |
| break; |
| } |
| continue; |
| } |
| |
| /* If it's a compatible string, see if it's the right one. */ |
| int fd = open(name, O_RDONLY); |
| int clen = strlen(compat); |
| char *buffer = alloca(clen + 1); |
| |
| if (fd < 0) { |
| perror(name); |
| continue; |
| } |
| |
| if (read(fd, buffer, clen + 1) < 0) { |
| perror(name); |
| close(fd); |
| continue; |
| } |
| close(fd); |
| |
| if (!strcmp(compat, buffer)) { |
| /* Initialize these to "unset" for the way up. */ |
| *addr_cells_ptr = *size_cells_ptr = -1; |
| |
| /* Can't leave string on the stack or we'll lose it! */ |
| ret = strdup(parent); |
| break; |
| } |
| } |
| |
| closedir(dir); |
| return ret; |
| } |
| #endif /* __arm__ */ |
| |
| int main(int argc, char** argv) |
| { |
| int print_defaults = 1; |
| int print_console = 0; |
| int print_coverage = 0; |
| int print_list = 0; |
| int print_hexdump = 0; |
| int print_timestamps = 0; |
| int machine_readable_timestamps = 0; |
| |
| int opt, option_index = 0; |
| static struct option long_options[] = { |
| {"console", 0, 0, 'c'}, |
| {"coverage", 0, 0, 'C'}, |
| {"list", 0, 0, 'l'}, |
| {"timestamps", 0, 0, 't'}, |
| {"parseable-timestamps", 0, 0, 'T'}, |
| {"hexdump", 0, 0, 'x'}, |
| {"verbose", 0, 0, 'V'}, |
| {"version", 0, 0, 'v'}, |
| {"help", 0, 0, 'h'}, |
| {0, 0, 0, 0} |
| }; |
| while ((opt = getopt_long(argc, argv, "cCltTxVvh?", |
| long_options, &option_index)) != EOF) { |
| switch (opt) { |
| case 'c': |
| print_console = 1; |
| print_defaults = 0; |
| break; |
| case 'C': |
| print_coverage = 1; |
| print_defaults = 0; |
| break; |
| case 'l': |
| print_list = 1; |
| print_defaults = 0; |
| break; |
| case 'x': |
| print_hexdump = 1; |
| print_defaults = 0; |
| break; |
| case 't': |
| print_timestamps = 1; |
| print_defaults = 0; |
| break; |
| case 'T': |
| print_timestamps = 1; |
| machine_readable_timestamps = 1; |
| print_defaults = 0; |
| break; |
| case 'V': |
| verbose = 1; |
| break; |
| case 'v': |
| print_version(); |
| exit(0); |
| break; |
| case 'h': |
| case '?': |
| default: |
| print_usage(argv[0]); |
| exit(0); |
| break; |
| } |
| } |
| |
| mem_fd = open("/dev/mem", O_RDONLY, 0); |
| if (mem_fd < 0) { |
| fprintf(stderr, "Failed to gain memory access: %s\n", |
| strerror(errno)); |
| return 1; |
| } |
| |
| #ifdef __arm__ |
| int addr_cells, size_cells; |
| char *coreboot_node = dt_find_compat("/proc/device-tree", "coreboot", |
| &addr_cells, &size_cells); |
| |
| if (!coreboot_node) { |
| fprintf(stderr, "Could not find 'coreboot' compatible node!\n"); |
| return 1; |
| } |
| |
| if (addr_cells < 0) { |
| fprintf(stderr, "Warning: no #address-cells node in tree!\n"); |
| addr_cells = 1; |
| } |
| |
| int nlen = strlen(coreboot_node); |
| char *reg = alloca(nlen + sizeof("/reg")); |
| |
| strcpy(reg, coreboot_node); |
| strcpy(reg + nlen, "/reg"); |
| free(coreboot_node); |
| |
| int fd = open(reg, O_RDONLY); |
| if (fd < 0) { |
| perror(reg); |
| return 1; |
| } |
| |
| int i; |
| size_t size_to_read = addr_cells * 4 + size_cells * 4; |
| u8 *dtbuffer = alloca(size_to_read); |
| if (read(fd, dtbuffer, size_to_read) < 0) { |
| perror(reg); |
| return 1; |
| } |
| close(fd); |
| |
| /* No variable-length byte swap function anywhere in C... how sad. */ |
| u64 baseaddr = 0; |
| for (i = 0; i < addr_cells * 4; i++) { |
| baseaddr <<= 8; |
| baseaddr |= *dtbuffer; |
| dtbuffer++; |
| } |
| u64 cb_table_size = 0; |
| for (i = 0; i < size_cells * 4; i++) { |
| cb_table_size <<= 8; |
| cb_table_size |= *dtbuffer; |
| dtbuffer++; |
| } |
| |
| parse_cbtable(baseaddr, cb_table_size); |
| #else |
| int j; |
| static const int possible_base_addresses[] = { 0, 0xf0000 }; |
| |
| /* Find and parse coreboot table */ |
| for (j = 0; j < ARRAY_SIZE(possible_base_addresses); j++) { |
| if (parse_cbtable(possible_base_addresses[j], MAP_BYTES)) |
| break; |
| } |
| #endif |
| |
| if (print_console) |
| dump_console(); |
| |
| if (print_coverage) |
| dump_coverage(); |
| |
| if (print_list) |
| dump_cbmem_toc(); |
| |
| if (print_hexdump) |
| dump_cbmem_hex(); |
| |
| if (print_defaults || print_timestamps) |
| dump_timestamps(machine_readable_timestamps); |
| |
| close(mem_fd); |
| return 0; |
| } |