mirror of
https://review.coreboot.org/flashrom.git
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a60faab83e
This patch reduces the stack usage by declaring 'const' stack variables as 'static const' so they end up in the .rodata section instead of being copied from there to the stack for every invocation of the corresponding function. As a plus we end up in having a smaller binary as the "copy from .rodata to stack" code isn't emitted by the compiler any more (roughly -100 bytes). Corresponding to flashrom svn r1252. Signed-off-by: Mathias Krause <mathias.krause@secunet.com> Acked-by: Stefan Reinauer <stepan@coreboot.org>
144 lines
3.8 KiB
C
144 lines
3.8 KiB
C
/*
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* This file is part of the flashrom project.
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*
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* Copyright (C) 2008 Claus Gindhart <claus.gindhart@kontron.com>
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* Copyright (C) 2009 Sean Nelson <audiohacked@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/*
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* This module is designed for supporting the devices
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* ST M50FLW040A (not yet tested)
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* ST M50FLW040B (not yet tested)
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* ST M50FLW080A
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* ST M50FLW080B (not yet tested)
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*/
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#include "flash.h"
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#include "flashchips.h"
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#include "chipdrivers.h"
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/*
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* claus.gindhart@kontron.com
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* The ST M50FLW080B and STM50FLW080B chips have to be unlocked,
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* before you can erase them or write to them.
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*/
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static int unlock_block_stm50flw0x0x(struct flashchip *flash, int offset)
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{
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chipaddr wrprotect = flash->virtual_registers + 2;
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static const uint8_t unlock_sector = 0x00;
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int j;
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/*
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* These chips have to be unlocked before you can erase them or write
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* to them. The size of the locking sectors depends on the type
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* of chip.
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*
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* Sometimes, the BIOS does this for you; so you probably
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* don't need to worry about that.
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*/
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/* Check, if it's is a top/bottom-block with 4k-sectors. */
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/* TODO: What about the other types? */
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if ((offset == 0) ||
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(offset == (flash->model_id == ST_M50FLW080A ? 0xE0000 : 0x10000))
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|| (offset == 0xF0000)) {
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// unlock each 4k-sector
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for (j = 0; j < 0x10000; j += 0x1000) {
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msg_cdbg("unlocking at 0x%x\n", offset + j);
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chip_writeb(unlock_sector, wrprotect + offset + j);
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if (chip_readb(wrprotect + offset + j) != unlock_sector) {
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msg_cerr("Cannot unlock sector @ 0x%x\n",
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offset + j);
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return -1;
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}
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}
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} else {
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msg_cdbg("unlocking at 0x%x\n", offset);
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chip_writeb(unlock_sector, wrprotect + offset);
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if (chip_readb(wrprotect + offset) != unlock_sector) {
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msg_cerr("Cannot unlock sector @ 0x%x\n", offset);
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return -1;
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}
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}
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return 0;
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}
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int unlock_stm50flw0x0x(struct flashchip *flash)
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{
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int i;
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for (i = 0; i < flash->total_size * 1024; i+= flash->page_size) {
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if(unlock_block_stm50flw0x0x(flash, i)) {
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msg_cerr("UNLOCK FAILED!\n");
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return -1;
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}
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}
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return 0;
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}
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/* This function is unused. */
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int erase_sector_stm50flw0x0x(struct flashchip *flash, unsigned int sector, unsigned int sectorsize)
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{
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chipaddr bios = flash->virtual_memory + sector;
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// clear status register
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chip_writeb(0x50, bios);
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// now start it
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chip_writeb(0x32, bios);
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chip_writeb(0xd0, bios);
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programmer_delay(10);
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wait_82802ab(flash);
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if (check_erased_range(flash, sector, sectorsize)) {
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msg_cerr("ERASE FAILED!\n");
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return -1;
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}
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return 0;
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}
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/* FIXME: This function is not a real chip erase function. */
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int erase_chip_stm50flw0x0x(struct flashchip *flash, unsigned int addr, unsigned int blocklen)
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{
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int i;
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int total_size = flash->total_size * 1024;
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int page_size = flash->page_size;
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if ((addr != 0) || (blocklen != flash->total_size * 1024)) {
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msg_cerr("%s called with incorrect arguments\n",
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__func__);
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return -1;
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}
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for (i = 0; i < total_size / page_size; i++) {
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//if (unlock_block_stm50flw0x0x(flash, i * page_size)) {
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// msg_cerr("UNLOCK FAILED!\n");
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// return -1;
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//}
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if (erase_block_82802ab(flash, i * page_size, page_size)) {
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msg_cerr("ERASE FAILED!\n");
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return -1;
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}
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}
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return 0;
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}
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