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Optimized write_sst_fwhub for safety and speed

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Now uses block erase instead of chip erase. Also introduced auto skip
feature.

Corresponding to flashrom svn r778.

Signed-off-by: Adam Jurkowski <adam.jurkowski@kontron.pl>
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
This commit is contained in:
Adam Jurkowski 2009-11-25 15:04:28 +00:00 committed by Carl-Daniel Hailfinger
parent 96123034f4
commit 411d7c1526
1 changed files with 23 additions and 15 deletions
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36
sst_fwhub.c
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@ -2,6 +2,7 @@
* This file is part of the flashrom project.
*
* Copyright (C) 2000 Silicon Integrated System Corporation
* Copyright (C) 2009 Kontron Modular Computers
*
* 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
@ -20,6 +21,8 @@
/* Adapted from the Intel FW hub stuff for 82802ax parts. */
#include <stdlib.h>
#include <string.h>
#include "flash.h"
// I need that Berkeley bit-map printer
@ -130,28 +133,33 @@ int erase_sst_fwhub(struct flashchip *flash)
int write_sst_fwhub(struct flashchip *flash, uint8_t *buf)
{
int i;
int i, rc;
int total_size = flash->total_size * 1024;
int page_size = flash->page_size;
chipaddr bios = flash->virtual_memory;
uint8_t blockstatus;
// FIXME: We want block wide erase instead of ironing the whole chip
if (erase_sst_fwhub(flash)) {
fprintf(stderr, "ERASE FAILED!\n");
return -1;
}
uint8_t *readbuf = malloc(page_size);
printf("Programming page: ");
for (i = 0; i < total_size / page_size; i++) {
printf("%04d at address: 0x%08x", i, i * page_size);
blockstatus = clear_sst_fwhub_block_lock(flash, i * page_size);
if (blockstatus) {
printf(" is locked down permanently, aborting\n");
return 1;
/* Auto Skip Blocks, which already contain the desired data:
* Faster, because we only write, what has changed
* More secure, because blocks, which are excluded
* (with the exclude or layout feature)
* are not erased and rewritten; data is retained also
* in sudden power off situations
*/
flash->read(flash, readbuf, i * page_size, page_size);
if (memcmp((void *)(buf + i * page_size),
(void *)(readbuf), page_size)) {
rc = erase_sst_fwhub_block(flash, i * page_size,
page_size);
if (rc)
return 1;
write_sector_jedec(bios, buf + i * page_size,
bios + i * page_size, page_size);
}
write_sector_jedec(bios, buf + i * page_size,
bios + i * page_size, page_size);
printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b");
}
printf("\n");