diff options
Diffstat (limited to 'libflashrom.c')
| -rw-r--r-- | libflashrom.c | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/libflashrom.c b/libflashrom.c index 34e881ad7..f90a22cbc 100644 --- a/libflashrom.c +++ b/libflashrom.c @@ -25,6 +25,7 @@ #include <stdarg.h> #include "flash.h" +#include "fmap.h" #include "programmer.h" #include "layout.h" #include "hwaccess.h" @@ -382,6 +383,124 @@ _free_ret: #endif } +static int flashrom_layout_parse_fmap(struct flashrom_layout **layout, + struct flashctx *const flashctx, const struct fmap *const fmap) +{ + int i; + struct flashrom_layout *l = get_global_layout(); + + if (!fmap || !l) + return 1; + + if (l->num_entries + fmap->nareas > MAX_ROMLAYOUT) { + msg_gerr("Cannot add fmap entries to layout - Too many entries.\n"); + return 1; + } + + for (i = 0; i < fmap->nareas; i++) { + l->entries[l->num_entries].start = fmap->areas[i].offset; + l->entries[l->num_entries].end = fmap->areas[i].offset + fmap->areas[i].size - 1; + l->entries[l->num_entries].included = false; + memset(l->entries[l->num_entries].name, 0, sizeof(l->entries[i].name)); + memcpy(l->entries[l->num_entries].name, fmap->areas[i].name, + min(FMAP_STRLEN, sizeof(l->entries[i].name))); + msg_gdbg("fmap %08x - %08x named %s\n", + l->entries[l->num_entries].start, + l->entries[l->num_entries].end, + l->entries[l->num_entries].name); + l->num_entries++; + } + + *layout = l; + return 0; +} + +/** + * @brief Read a layout by searching the flash chip for fmap. + * + * @param[out] layout Points to a struct flashrom_layout pointer that + * gets set if the fmap is read and parsed successfully. + * @param[in] flashctx Flash context + * @param[in] offset Offset to begin searching for fmap. + * @param[in] offset Length of address space to search. + * + * @return 0 on success, + * 3 if fmap parsing isn't implemented for the host, + * 2 if the fmap couldn't be read, + * 1 on any other error. + */ +int flashrom_layout_read_fmap_from_rom(struct flashrom_layout **const layout, + struct flashctx *const flashctx, off_t offset, size_t len) +{ +#ifndef __FLASHROM_LITTLE_ENDIAN__ + return 3; +#else + struct fmap *fmap = NULL; + int ret = 0; + + msg_gdbg("Attempting to read fmap from ROM content.\n"); + if (fmap_read_from_rom(&fmap, flashctx, offset, len)) { + msg_gerr("Failed to read fmap from ROM.\n"); + return 1; + } + + msg_gdbg("Adding fmap layout to global layout.\n"); + if (flashrom_layout_parse_fmap(layout, flashctx, fmap)) { + msg_gerr("Failed to add fmap regions to layout.\n"); + ret = 1; + } + + free(fmap); + return ret; +#endif +} + +/** + * @brief Read a layout by searching buffer for fmap. + * + * @param[out] layout Points to a struct flashrom_layout pointer that + * gets set if the fmap is read and parsed successfully. + * @param[in] flashctx Flash context + * @param[in] buffer Buffer to search in + * @param[in] size Size of buffer to search + * + * @return 0 on success, + * 3 if fmap parsing isn't implemented for the host, + * 2 if the fmap couldn't be read, + * 1 on any other error. + */ +int flashrom_layout_read_fmap_from_buffer(struct flashrom_layout **const layout, + struct flashctx *const flashctx, const uint8_t *const buf, size_t size) +{ +#ifndef __FLASHROM_LITTLE_ENDIAN__ + return 3; +#else + struct fmap *fmap = NULL; + int ret = 1; + + if (!buf || !size) + goto _ret; + + msg_gdbg("Attempting to read fmap from buffer.\n"); + if (fmap_read_from_buffer(&fmap, buf, size)) { + msg_gerr("Failed to read fmap from buffer.\n"); + goto _ret; + } + + msg_gdbg("Adding fmap layout to global layout.\n"); + if (flashrom_layout_parse_fmap(layout, flashctx, fmap)) { + msg_gerr("Failed to add fmap regions to layout.\n"); + goto _free_ret; + } + + ret = 0; +_free_ret: + free(fmap); +_ret: + return ret; +#endif +} + /** * @brief Free a layout. * |