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flashrom.c
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/*
* This file is part of the flashrom project.
*
* Copyright (C) 2000 Silicon Integrated System Corporation
* Copyright (C) 2004 Tyan Corp <[email protected]>
* Copyright (C) 2005-2008 coresystems GmbH
* Copyright (C) 2008,2009 Carl-Daniel Hailfinger
* Copyright (C) 2016 secunet Security Networks AG
* (Written by Nico Huber <[email protected]> for secunet)
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* 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.
*/
#include <stdio.h>
#include <sys/types.h>
#ifndef __LIBPAYLOAD__
#include <fcntl.h>
#include <sys/stat.h>
#endif
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <ctype.h>
#if HAVE_UTSNAME == 1
#include <sys/utsname.h>
#endif
#include "flash.h"
#include "flashchips.h"
#include "programmer.h"
#include "hwaccess_physmap.h"
#include "chipdrivers.h"
const char flashrom_version[] = FLASHROM_VERSION;
const char *chip_to_probe = NULL;
static const struct programmer_entry *programmer = NULL;
static const char *programmer_param = NULL;
/*
* Programmers supporting multiple buses can have differing size limits on
* each bus. Store the limits for each bus in a common struct.
*/
struct decode_sizes max_rom_decode;
/* If nonzero, used as the start address of bottom-aligned flash. */
unsigned long flashbase;
/* Is writing allowed with this programmer? */
int programmer_may_write;
#define SHUTDOWN_MAXFN 32
static int shutdown_fn_count = 0;
/** @private */
static struct shutdown_func_data {
int (*func) (void *data);
void *data;
} shutdown_fn[SHUTDOWN_MAXFN];
/* Initialize to 0 to make sure nobody registers a shutdown function before
* programmer init.
*/
static int may_register_shutdown = 0;
/* Did we change something or was every erase/write skipped (if any)? */
static bool all_skipped = true;
/* Register a function to be executed on programmer shutdown.
* The advantage over atexit() is that you can supply a void pointer which will
* be used as parameter to the registered function upon programmer shutdown.
* This pointer can point to arbitrary data used by said function, e.g. undo
* information for GPIO settings etc. If unneeded, set data=NULL.
* Please note that the first (void *data) belongs to the function signature of
* the function passed as first parameter.
*/
int register_shutdown(int (*function) (void *data), void *data)
{
if (shutdown_fn_count >= SHUTDOWN_MAXFN) {
msg_perr("Tried to register more than %i shutdown functions.\n",
SHUTDOWN_MAXFN);
return 1;
}
if (!may_register_shutdown) {
msg_perr("Tried to register a shutdown function before "
"programmer init.\n");
return 1;
}
shutdown_fn[shutdown_fn_count].func = function;
shutdown_fn[shutdown_fn_count].data = data;
shutdown_fn_count++;
return 0;
}
int register_chip_restore(chip_restore_fn_cb_t func,
struct flashctx *flash, uint8_t status)
{
if (flash->chip_restore_fn_count >= MAX_CHIP_RESTORE_FUNCTIONS) {
msg_perr("Tried to register more than %i chip restore"
" functions.\n", MAX_CHIP_RESTORE_FUNCTIONS);
return 1;
}
flash->chip_restore_fn[flash->chip_restore_fn_count].func = func;
flash->chip_restore_fn[flash->chip_restore_fn_count].status = status;
flash->chip_restore_fn_count++;
return 0;
}
static int deregister_chip_restore(struct flashctx *flash)
{
int rc = 0;
while (flash->chip_restore_fn_count > 0) {
int i = --flash->chip_restore_fn_count;
rc |= flash->chip_restore_fn[i].func(
flash, flash->chip_restore_fn[i].status);
}
return rc;
}
int programmer_init(const struct programmer_entry *prog, const char *param)
{
int ret;
if (prog == NULL) {
msg_perr("Invalid programmer specified!\n");
return -1;
}
programmer = prog;
/* Initialize all programmer specific data. */
/* Default to unlimited decode sizes. */
max_rom_decode = (const struct decode_sizes) {
.parallel = 0xffffffff,
.lpc = 0xffffffff,
.fwh = 0xffffffff,
.spi = 0xffffffff,
};
/* Default to top aligned flash at 4 GB. */
flashbase = 0;
/* Registering shutdown functions is now allowed. */
may_register_shutdown = 1;
/* Default to allowing writes. Broken programmers set this to 0. */
programmer_may_write = 1;
programmer_param = param;
msg_pdbg("Initializing %s programmer\n", programmer->name);
ret = programmer->init();
if (programmer_param && strlen(programmer_param)) {
if (ret != 0) {
/* It is quite possible that any unhandled programmer parameter would have been valid,
* but an error in actual programmer init happened before the parameter was evaluated.
*/
msg_pwarn("Unhandled programmer parameters (possibly due to another failure): %s\n",
programmer_param);
} else {
/* Actual programmer init was successful, but the user specified an invalid or unusable
* (for the current programmer configuration) parameter.
*/
msg_perr("Unhandled programmer parameters: %s\n", programmer_param);
msg_perr("Aborting.\n");
ret = ERROR_FATAL;
}
}
return ret;
}
/** Calls registered shutdown functions and resets internal programmer-related variables.
* Calling it is safe even without previous initialization, but further interactions with programmer support
* require a call to programmer_init() (afterwards).
*
* @return The OR-ed result values of all shutdown functions (i.e. 0 on success). */
int programmer_shutdown(void)
{
int ret = 0;
/* Registering shutdown functions is no longer allowed. */
may_register_shutdown = 0;
while (shutdown_fn_count > 0) {
int i = --shutdown_fn_count;
ret |= shutdown_fn[i].func(shutdown_fn[i].data);
}
programmer_param = NULL;
registered_master_count = 0;
return ret;
}
void *programmer_map_flash_region(const char *descr, uintptr_t phys_addr, size_t len)
{
void *ret = programmer->map_flash_region(descr, phys_addr, len);
msg_gspew("%s: mapping %s from 0x%0*" PRIxPTR " to 0x%0*" PRIxPTR "\n",
__func__, descr, PRIxPTR_WIDTH, phys_addr, PRIxPTR_WIDTH, (uintptr_t) ret);
return ret;
}
void programmer_unmap_flash_region(void *virt_addr, size_t len)
{
programmer->unmap_flash_region(virt_addr, len);
msg_gspew("%s: unmapped 0x%0*" PRIxPTR "\n", __func__, PRIxPTR_WIDTH, (uintptr_t)virt_addr);
}
void chip_writeb(const struct flashctx *flash, uint8_t val, chipaddr addr)
{
flash->mst->par.chip_writeb(flash, val, addr);
}
void chip_writew(const struct flashctx *flash, uint16_t val, chipaddr addr)
{
flash->mst->par.chip_writew(flash, val, addr);
}
void chip_writel(const struct flashctx *flash, uint32_t val, chipaddr addr)
{
flash->mst->par.chip_writel(flash, val, addr);
}
void chip_writen(const struct flashctx *flash, const uint8_t *buf, chipaddr addr, size_t len)
{
flash->mst->par.chip_writen(flash, buf, addr, len);
}
uint8_t chip_readb(const struct flashctx *flash, const chipaddr addr)
{
return flash->mst->par.chip_readb(flash, addr);
}
uint16_t chip_readw(const struct flashctx *flash, const chipaddr addr)
{
return flash->mst->par.chip_readw(flash, addr);
}
uint32_t chip_readl(const struct flashctx *flash, const chipaddr addr)
{
return flash->mst->par.chip_readl(flash, addr);
}
void chip_readn(const struct flashctx *flash, uint8_t *buf, chipaddr addr,
size_t len)
{
flash->mst->par.chip_readn(flash, buf, addr, len);
}
void programmer_delay(unsigned int usecs)
{
if (usecs > 0)
programmer->delay(usecs);
}
int read_memmapped(struct flashctx *flash, uint8_t *buf, unsigned int start,
int unsigned len)
{
chip_readn(flash, buf, flash->virtual_memory + start, len);
return 0;
}
/* This is a somewhat hacked function similar in some ways to strtok().
* It will look for needle with a subsequent '=' in haystack, return a copy of
* needle and remove everything from the first occurrence of needle to the next
* delimiter from haystack.
*/
static char *extract_param(const char *const *haystack, const char *needle, const char *delim)
{
char *param_pos, *opt_pos, *rest;
char *opt = NULL;
int optlen;
int needlelen;
needlelen = strlen(needle);
if (!needlelen) {
msg_gerr("%s: empty needle! Please report a bug at "
"[email protected]\n", __func__);
return NULL;
}
/* No programmer parameters given. */
if (*haystack == NULL)
return NULL;
param_pos = strstr(*haystack, needle);
do {
if (!param_pos)
return NULL;
/* Needle followed by '='? */
if (param_pos[needlelen] == '=') {
/* Beginning of the string? */
if (param_pos == *haystack)
break;
/* After a delimiter? */
if (strchr(delim, *(param_pos - 1)))
break;
}
/* Continue searching. */
param_pos++;
param_pos = strstr(param_pos, needle);
} while (1);
if (param_pos) {
/* Get the string after needle and '='. */
opt_pos = param_pos + needlelen + 1;
optlen = strcspn(opt_pos, delim);
/* Return an empty string if the parameter was empty. */
opt = malloc(optlen + 1);
if (!opt) {
msg_gerr("Out of memory!\n");
exit(1);
}
strncpy(opt, opt_pos, optlen);
opt[optlen] = '\0';
rest = opt_pos + optlen;
/* Skip all delimiters after the current parameter. */
rest += strspn(rest, delim);
memmove(param_pos, rest, strlen(rest) + 1);
/* We could shrink haystack, but the effort is not worth it. */
}
return opt;
}
char *extract_programmer_param(const char *param_name)
{
return extract_param(&programmer_param, param_name, ",");
}
static int check_block_eraser(const struct flashctx *flash, int k, int log)
{
struct block_eraser eraser = flash->chip->block_erasers[k];
if (!eraser.block_erase && !eraser.eraseblocks[0].count) {
if (log)
msg_cdbg("not defined. ");
return 1;
}
if (!eraser.block_erase && eraser.eraseblocks[0].count) {
if (log)
msg_cdbg("eraseblock layout is known, but matching "
"block erase function is not implemented. ");
return 1;
}
if (eraser.block_erase && !eraser.eraseblocks[0].count) {
if (log)
msg_cdbg("block erase function found, but "
"eraseblock layout is not defined. ");
return 1;
}
// TODO: Once erase functions are annotated with allowed buses, check that as well.
return 0;
}
/* Returns the number of well-defined erasers for a chip. */
static unsigned int count_usable_erasers(const struct flashctx *flash)
{
unsigned int usable_erasefunctions = 0;
int k;
for (k = 0; k < NUM_ERASEFUNCTIONS; k++) {
if (!check_block_eraser(flash, k, 0))
usable_erasefunctions++;
}
return usable_erasefunctions;
}
static int compare_range(const uint8_t *wantbuf, const uint8_t *havebuf, unsigned int start, unsigned int len)
{
int ret = 0, failcount = 0;
unsigned int i;
if (!ignorec){
for (i = 0; i < len; i++) {
if (wantbuf[i] != havebuf[i]) {
/* Only print the first failure. */
if (!failcount++)
msg_cerr("FAILED at 0x%08x! Expected=0x%02x, Found=0x%02x,",
start + i, wantbuf[i], havebuf[i]);
}
}
if (failcount) {
msg_cerr(" failed byte count from 0x%08x-0x%08x: 0x%x\n",
start, start + len - 1, failcount);
ret = -1;
}}
return ret;
}
/* start is an offset to the base address of the flash chip */
static int check_erased_range(struct flashctx *flash, unsigned int start, unsigned int len)
{
int ret;
uint8_t *cmpbuf = malloc(len);
const uint8_t erased_value = ERASED_VALUE(flash);
if (!cmpbuf) {
msg_gerr("Could not allocate memory!\n");
exit(1);
}
memset(cmpbuf, erased_value, len);
ret = verify_range(flash, cmpbuf, start, len);
free(cmpbuf);
return ret;
}
/*
* @cmpbuf buffer to compare against, cmpbuf[0] is expected to match the
* flash content at location start
* @start offset to the base address of the flash chip
* @len length of the verified area
* @return 0 for success, -1 for failure
*/
int verify_range(struct flashctx *flash, const uint8_t *cmpbuf, unsigned int start, unsigned int len)
{
if (!len)
return -1;
if (start + len > flash->chip->total_size * 1024) {
msg_gerr("Error: %s called with start 0x%x + len 0x%x >"
" total_size 0x%x\n", __func__, start, len,
flash->chip->total_size * 1024);
return -1;
}
if (!flash->chip->read) {
msg_cerr("ERROR: flashrom has no read function for this flash chip.\n");
return -1;
}
uint8_t *readbuf = malloc(len);
if (!readbuf) {
msg_gerr("Could not allocate memory!\n");
return -1;
}
int ret = flash->chip->read(flash, readbuf, start, len);
if (ret) {
msg_gerr("Verification impossible because read failed "
"at 0x%x (len 0x%x)\n", start, len);
ret = -1;
goto out_free;
}
ret = compare_range(cmpbuf, readbuf, start, len);
out_free:
free(readbuf);
return ret;
}
/* Helper function for need_erase() that focuses on granularities of gran bytes. */
static int need_erase_gran_bytes(const uint8_t *have, const uint8_t *want, unsigned int len,
unsigned int gran, const uint8_t erased_value)
{
unsigned int i, j, limit;
for (j = 0; j < len / gran; j++) {
limit = min (gran, len - j * gran);
/* Are 'have' and 'want' identical? */
if (!memcmp(have + j * gran, want + j * gran, limit))
continue;
/* have needs to be in erased state. */
for (i = 0; i < limit; i++)
if (have[j * gran + i] != erased_value)
return 1;
}
return 0;
}
/*
* Check if the buffer @have can be programmed to the content of @want without
* erasing. This is only possible if all chunks of size @gran are either kept
* as-is or changed from an all-ones state to any other state.
*
* Warning: This function assumes that @have and @want point to naturally
* aligned regions.
*
* @have buffer with current content
* @want buffer with desired content
* @len length of the checked area
* @gran write granularity (enum, not count)
* @return 0 if no erase is needed, 1 otherwise
*/
static int need_erase(const uint8_t *have, const uint8_t *want, unsigned int len,
enum write_granularity gran, const uint8_t erased_value)
{
int result = 0;
unsigned int i;
switch (gran) {
case write_gran_1bit:
for (i = 0; i < len; i++)
if ((have[i] & want[i]) != want[i]) {
result = 1;
break;
}
break;
case write_gran_1byte:
for (i = 0; i < len; i++)
if ((have[i] != want[i]) && (have[i] != erased_value)) {
result = 1;
break;
}
break;
case write_gran_128bytes:
result = need_erase_gran_bytes(have, want, len, 128, erased_value);
break;
case write_gran_256bytes:
result = need_erase_gran_bytes(have, want, len, 256, erased_value);
break;
case write_gran_264bytes:
result = need_erase_gran_bytes(have, want, len, 264, erased_value);
break;
case write_gran_512bytes:
result = need_erase_gran_bytes(have, want, len, 512, erased_value);
break;
case write_gran_528bytes:
result = need_erase_gran_bytes(have, want, len, 528, erased_value);
break;
case write_gran_1024bytes:
result = need_erase_gran_bytes(have, want, len, 1024, erased_value);
break;
case write_gran_1056bytes:
result = need_erase_gran_bytes(have, want, len, 1056, erased_value);
break;
case write_gran_1byte_implicit_erase:
/* Do not erase, handle content changes from anything->0xff by writing 0xff. */
result = 0;
break;
default:
msg_cerr("%s: Unsupported granularity! Please report a bug at "
"[email protected]\n", __func__);
}
return result;
}
/**
* Check if the buffer @have needs to be programmed to get the content of @want.
* If yes, return 1 and fill in first_start with the start address of the
* write operation and first_len with the length of the first to-be-written
* chunk. If not, return 0 and leave first_start and first_len undefined.
*
* Warning: This function assumes that @have and @want point to naturally
* aligned regions.
*
* @have buffer with current content
* @want buffer with desired content
* @len length of the checked area
* @gran write granularity (enum, not count)
* @first_start offset of the first byte which needs to be written (passed in
* value is increased by the offset of the first needed write
* relative to have/want or unchanged if no write is needed)
* @return length of the first contiguous area which needs to be written
* 0 if no write is needed
*
* FIXME: This function needs a parameter which tells it about coalescing
* in relation to the max write length of the programmer and the max write
* length of the chip.
*/
static unsigned int get_next_write(const uint8_t *have, const uint8_t *want, unsigned int len,
unsigned int *first_start,
enum write_granularity gran)
{
int need_write = 0;
unsigned int rel_start = 0, first_len = 0;
unsigned int i, limit, stride;
switch (gran) {
case write_gran_1bit:
case write_gran_1byte:
case write_gran_1byte_implicit_erase:
stride = 1;
break;
case write_gran_128bytes:
stride = 128;
break;
case write_gran_256bytes:
stride = 256;
break;
case write_gran_264bytes:
stride = 264;
break;
case write_gran_512bytes:
stride = 512;
break;
case write_gran_528bytes:
stride = 528;
break;
case write_gran_1024bytes:
stride = 1024;
break;
case write_gran_1056bytes:
stride = 1056;
break;
default:
msg_cerr("%s: Unsupported granularity! Please report a bug at "
"[email protected]\n", __func__);
/* Claim that no write was needed. A write with unknown
* granularity is too dangerous to try.
*/
return 0;
}
for (i = 0; i < len / stride; i++) {
limit = min(stride, len - i * stride);
/* Are 'have' and 'want' identical? */
if (memcmp(have + i * stride, want + i * stride, limit)) {
if (!need_write) {
/* First location where have and want differ. */
need_write = 1;
rel_start = i * stride;
}
} else {
if (need_write) {
/* First location where have and want
* do not differ anymore.
*/
break;
}
}
}
if (need_write)
first_len = min(i * stride - rel_start, len);
*first_start += rel_start;
return first_len;
}
/* Returns the number of buses commonly supported by the current programmer and flash chip where the latter
* can not be completely accessed due to size/address limits of the programmer. */
unsigned int count_max_decode_exceedings(const struct flashctx *flash)
{
unsigned int limitexceeded = 0;
uint32_t size = flash->chip->total_size * 1024;
enum chipbustype buses = flash->mst->buses_supported & flash->chip->bustype;
if ((buses & BUS_PARALLEL) && (max_rom_decode.parallel < size)) {
limitexceeded++;
msg_pdbg("Chip size %u kB is bigger than supported "
"size %u kB of chipset/board/programmer "
"for %s interface, "
"probe/read/erase/write may fail. ", size / 1024,
max_rom_decode.parallel / 1024, "Parallel");
}
if ((buses & BUS_LPC) && (max_rom_decode.lpc < size)) {
limitexceeded++;
msg_pdbg("Chip size %u kB is bigger than supported "
"size %u kB of chipset/board/programmer "
"for %s interface, "
"probe/read/erase/write may fail. ", size / 1024,
max_rom_decode.lpc / 1024, "LPC");
}
if ((buses & BUS_FWH) && (max_rom_decode.fwh < size)) {
limitexceeded++;
msg_pdbg("Chip size %u kB is bigger than supported "
"size %u kB of chipset/board/programmer "
"for %s interface, "
"probe/read/erase/write may fail. ", size / 1024,
max_rom_decode.fwh / 1024, "FWH");
}
if ((buses & BUS_SPI) && (max_rom_decode.spi < size)) {
limitexceeded++;
msg_pdbg("Chip size %u kB is bigger than supported "
"size %u kB of chipset/board/programmer "
"for %s interface, "
"probe/read/erase/write may fail. ", size / 1024,
max_rom_decode.spi / 1024, "SPI");
}
return limitexceeded;
}
void unmap_flash(struct flashctx *flash)
{
if (flash->virtual_registers != (chipaddr)ERROR_PTR) {
programmer_unmap_flash_region((void *)flash->virtual_registers, flash->chip->total_size * 1024);
flash->physical_registers = 0;
flash->virtual_registers = (chipaddr)ERROR_PTR;
}
if (flash->virtual_memory != (chipaddr)ERROR_PTR) {
programmer_unmap_flash_region((void *)flash->virtual_memory, flash->chip->total_size * 1024);
flash->physical_memory = 0;
flash->virtual_memory = (chipaddr)ERROR_PTR;
}
}
int map_flash(struct flashctx *flash)
{
/* Init pointers to the fail-safe state to distinguish them later from legit values. */
flash->virtual_memory = (chipaddr)ERROR_PTR;
flash->virtual_registers = (chipaddr)ERROR_PTR;
/* FIXME: This avoids mapping (and unmapping) of flash chip definitions with size 0.
* These are used for various probing-related hacks that would not map successfully anyway and should be
* removed ASAP. */
if (flash->chip->total_size == 0)
return 0;
const chipsize_t size = flash->chip->total_size * 1024;
uintptr_t base = flashbase ? flashbase : (0xffffffff - size + 1);
void *addr = programmer_map_flash_region(flash->chip->name, base, size);
if (addr == ERROR_PTR) {
msg_perr("Could not map flash chip %s at 0x%0*" PRIxPTR ".\n",
flash->chip->name, PRIxPTR_WIDTH, base);
return 1;
}
flash->physical_memory = base;
flash->virtual_memory = (chipaddr)addr;
/* FIXME: Special function registers normally live 4 MByte below flash space, but it might be somewhere
* completely different on some chips and programmers, or not mappable at all.
* Ignore these problems for now and always report success. */
if (flash->chip->feature_bits & FEATURE_REGISTERMAP) {
base = 0xffffffff - size - 0x400000 + 1;
addr = programmer_map_flash_region("flash chip registers", base, size);
if (addr == ERROR_PTR) {
msg_pdbg2("Could not map flash chip registers %s at 0x%0*" PRIxPTR ".\n",
flash->chip->name, PRIxPTR_WIDTH, base);
return 0;
}
flash->physical_registers = base;
flash->virtual_registers = (chipaddr)addr;
}
return 0;
}
/*
* Return a string corresponding to the bustype parameter.
* Memory is obtained with malloc() and must be freed with free() by the caller.
*/
char *flashbuses_to_text(enum chipbustype bustype)
{
char *ret = calloc(1, 1);
/*
* FIXME: Once all chipsets and flash chips have been updated, NONSPI
* will cease to exist and should be eliminated here as well.
*/
if (bustype == BUS_NONSPI) {
ret = strcat_realloc(ret, "Non-SPI, ");
} else {
if (bustype & BUS_PARALLEL)
ret = strcat_realloc(ret, "Parallel, ");
if (bustype & BUS_LPC)
ret = strcat_realloc(ret, "LPC, ");
if (bustype & BUS_FWH)
ret = strcat_realloc(ret, "FWH, ");
if (bustype & BUS_SPI)
ret = strcat_realloc(ret, "SPI, ");
if (bustype & BUS_PROG)
ret = strcat_realloc(ret, "Programmer-specific, ");
if (bustype == BUS_NONE)
ret = strcat_realloc(ret, "None, ");
}
/* Kill last comma. */
ret[strlen(ret) - 2] = '\0';
ret = realloc(ret, strlen(ret) + 1);
return ret;
}
int probe_flash(struct registered_master *mst, int startchip, struct flashctx *flash, int force)
{
const struct flashchip *chip;
enum chipbustype buses_common;
char *tmp;
for (chip = flashchips + startchip; chip && chip->name; chip++) {
if (chip_to_probe && strcmp(chip->name, chip_to_probe) != 0)
continue;
buses_common = mst->buses_supported & chip->bustype;
if (!buses_common)
continue;
/* Only probe for SPI25 chips by default. */
if (chip->bustype == BUS_SPI && !chip_to_probe && chip->spi_cmd_set != SPI25)
continue;
msg_gdbg("Probing for %s %s, %d kB: ", chip->vendor, chip->name, chip->total_size);
if (!chip->probe && !force) {
msg_gdbg("failed! flashrom has no probe function for this flash chip.\n");
continue;
}
/* Start filling in the dynamic data. */
flash->chip = calloc(1, sizeof(*flash->chip));
if (!flash->chip) {
msg_gerr("Out of memory!\n");
exit(1);
}
*flash->chip = *chip;
flash->mst = mst;
if (map_flash(flash) != 0)
goto notfound;
/* We handle a forced match like a real match, we just avoid probing. Note that probe_flash()
* is only called with force=1 after normal probing failed.
*/
if (force)
break;
if (flash->chip->probe(flash) != 1)
goto notfound;
/* If this is the first chip found, accept it.
* If this is not the first chip found, accept it only if it is
* a non-generic match. SFDP and CFI are generic matches.
* startchip==0 means this call to probe_flash() is the first
* one for this programmer interface (master) and thus no other chip has
* been found on this interface.
*/
if (startchip == 0 && flash->chip->model_id == SFDP_DEVICE_ID) {
msg_cinfo("===\n"
"SFDP has autodetected a flash chip which is "
"not natively supported by flashrom yet.\n");
if (count_usable_erasers(flash) == 0)
msg_cinfo("The standard operations read and "
"verify should work, but to support "
"erase, write and all other "
"possible features");
else
msg_cinfo("All standard operations (read, "
"verify, erase and write) should "
"work, but to support all possible "
"features");
msg_cinfo(" we need to add them manually.\n"
"You can help us by mailing us the output of the following command to "
"[email protected]:\n"
"'flashrom -VV [plus the -p/--programmer parameter]'\n"
"Thanks for your help!\n"
"===\n");
}
/* First flash chip detected on this bus. */
if (startchip == 0)
break;
/* Not the first flash chip detected on this bus, but not a generic match either. */
if ((flash->chip->model_id != GENERIC_DEVICE_ID) && (flash->chip->model_id != SFDP_DEVICE_ID))
break;
/* Not the first flash chip detected on this bus, and it's just a generic match. Ignore it. */
notfound:
unmap_flash(flash);
free(flash->chip);
flash->chip = NULL;
}
if (!flash->chip)
return -1;
/* Fill default layout covering the whole chip. */
if (flashrom_layout_new(&flash->default_layout) ||
flashrom_layout_add_region(flash->default_layout,
0, flash->chip->total_size * 1024 - 1, "complete flash") ||
flashrom_layout_include_region(flash->default_layout, "complete flash"))
return -1;
tmp = flashbuses_to_text(flash->chip->bustype);
msg_cinfo("%s %s flash chip \"%s\" (%d kB, %s) ", force ? "Assuming" : "Found",
flash->chip->vendor, flash->chip->name, flash->chip->total_size, tmp);
free(tmp);
#if CONFIG_INTERNAL == 1
if (programmer->map_flash_region == physmap)
msg_cinfo("mapped at physical address 0x%0*" PRIxPTR ".\n",
PRIxPTR_WIDTH, flash->physical_memory);
else
#endif
msg_cinfo("on %s.\n", programmer->name);
/* Flash registers may more likely not be mapped if the chip was forced.
* Lock info may be stored in registers, so avoid lock info printing. */
if (!force)
if (flash->chip->printlock)
flash->chip->printlock(flash);
/* Get out of the way for later runs. */
unmap_flash(flash);
/* Return position of matching chip. */
return chip - flashchips;
}
int read_buf_from_file(unsigned char *buf, unsigned long size,
const char *filename)
{
#ifdef __LIBPAYLOAD__
msg_gerr("Error: No file I/O support in libpayload\n");
return 1;
#else
int ret = 0;
FILE *image;
if (!strcmp(filename, "-"))
image = fdopen(fileno(stdin), "rb");
else
image = fopen(filename, "rb");
if (image == NULL) {
msg_gerr("Error: opening file \"%s\" failed: %s\n", filename, strerror(errno));
return 1;
}
struct stat image_stat;
if (fstat(fileno(image), &image_stat) != 0) {
msg_gerr("Error: getting metadata of file \"%s\" failed: %s\n", filename, strerror(errno));
ret = 1;
goto out;
}
if ((image_stat.st_size != (intmax_t)size) && strcmp(filename, "-") && !skipsize) {
msg_gerr("Error: Image size (%jd B) doesn't match the expected size (%lu B)!\n",
(intmax_t)image_stat.st_size, size);
ret = 1;
goto out;
}
if ((image_stat.st_size <= (intmax_t)size) && skipsize) {
msg_cerr("WARNING: Image size (%jdB) is smaller than flash chip's size (%luB), forced to proceed.\n",
(intmax_t)image_stat.st_size, size);
ret = 0;
}
unsigned long numbytes = fread(buf, 1, size, image);
if (numbytes != size && !skipsize) {
msg_gerr("Error: Failed to read complete file. Got %ld bytes, "
"wanted %ld!\n", numbytes, size);
ret = 1;
}
if (numbytes <= size && skipsize) {
// msg_cerr("WARNING: Image size (%ldB) is smaller than flash chip's size (%ldB), forced to proceed.\n", numbytes, size);
ret = 0;
}
out:
(void)fclose(image);
return ret;
#endif
}
/**
* @brief Reads content to buffer from one or more files.
*
* Reads content to supplied buffer from files. If a filename is specified for
* individual regions using the partial read syntax ('-i <region>[:<filename>]')
* then this will read file data into the corresponding region in the
* supplied buffer.
*
* @param flashctx Flash context to be used.
* @param buf Chip-sized buffer to write data to
* @return 0 on success
*/
int read_buf_from_include_args(const struct flashctx *const flash,
unsigned char *buf)
{
const struct flashrom_layout *const layout = get_layout(flash);
const struct romentry *entry = NULL;
/*
* Content will be read from -i args, so they must not overlap since
* we need to know exactly what content to write to the ROM.
*/
if (included_regions_overlap(layout)) {
msg_gerr("Error: Included regions must not overlap when writing.\n");
return 1;
}
while ((entry = layout_next_included(layout, entry))) {
if (!entry->file)
continue;
if (read_buf_from_file(buf + entry->start,
entry->end - entry->start + 1, entry->file))
return 1;
}
return 0;
}
/**
* @brief Writes passed data buffer into a file
*
* @param buf Buffer with data to write
* @param size Size of buffer
* @param filename File path to write to
* @return 0 on success
*/
int write_buf_to_file(const unsigned char *buf, unsigned long size, const char *filename)
{
#ifdef __LIBPAYLOAD__
msg_gerr("Error: No file I/O support in libpayload\n");
return 1;
#else
FILE *image;
int ret = 0;
if (!filename) {
msg_gerr("No filename specified.\n");
return 1;
}
if ((image = fopen(filename, "wb")) == NULL) {
msg_gerr("Error: opening file \"%s\" failed: %s\n", filename, strerror(errno));
return 1;
}
unsigned long numbytes = fwrite(buf, 1, size, image);
if (numbytes != size) {
msg_gerr("Error: file %s could not be written completely.\n", filename);
ret = 1;
goto out;
}
if (fflush(image)) {