ac12ecd27a
Right now we perform direct pointer manipulation without any abstraction to read from and write to memory mapped flash chips. That makes it impossible to drive any flasher which does not mmap the whole chip. Using helper functions readb() and writeb() allows a driver for external flash programmers like Paraflasher to replace readb and writeb with calls to its own chip access routines. This patch has the additional advantage of removing lots of unnecessary casts to volatile uint8_t * and now-superfluous parentheses which caused poor readability. I used the semantic patcher Coccinelle to create this patch. The semantic patch follows: @@ expression a; typedef uint8_t; volatile uint8_t *b; @@ - *(b) = (a); + writeb(a, b); @@ volatile uint8_t *b; @@ - *(b) + readb(b) @@ type T; T b; @@ ( readb | writeb ) (..., - (T) - (b) + b ) In contrast to a sed script, the semantic patch performs type checking before converting anything. Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net> Acked-by: FENG Yu Ning <fengyuning1984@gmail.com> Tested-by: Joe Julian git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3971 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
120 lines
3.2 KiB
C
120 lines
3.2 KiB
C
/*
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* This file is part of the flashrom project.
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*
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* Copyright (C) 2004 Tyan Corporation
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* Copyright (C) 2007 Nikolay Petukhov <nikolay.petukhov@gmail.com>
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* Copyright (C) 2007 Reinder E.N. de Haan <lb_reha@mveas.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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#include <stdio.h>
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#include "flash.h"
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extern int exclude_start_page, exclude_end_page;
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void write_lockbits_49fl00x(volatile uint8_t *bios, int size,
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unsigned char bits, int block_size)
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{
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int i, left = size;
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for (i = 0; left >= block_size; i++, left -= block_size) {
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/* pm49fl002 */
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if (block_size == 16384 && i % 2)
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continue;
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writeb(bits, bios + (i * block_size) + 2);
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}
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}
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int probe_49fl00x(struct flashchip *flash)
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{
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int ret = probe_jedec(flash);
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if (ret == 1)
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map_flash_registers(flash);
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return ret;
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}
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int erase_49fl00x(struct flashchip *flash)
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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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volatile uint8_t *bios = flash->virtual_memory;
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/* unprotected */
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write_lockbits_49fl00x(flash->virtual_registers,
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total_size, 0, page_size);
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/*
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* erase_chip_jedec() will not work... Datasheet says
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* "Chip erase is available in A/A Mux Mode only".
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*/
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printf("Erasing page: ");
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for (i = 0; i < total_size / page_size; i++) {
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if ((i >= exclude_start_page) && (i < exclude_end_page))
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continue;
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/* erase the page */
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erase_block_jedec(bios, i * page_size);
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printf("%04d at address: 0x%08x", i, i * page_size);
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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");
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fflush(stdout);
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}
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printf("\n");
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/* protected */
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write_lockbits_49fl00x(flash->virtual_registers,
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total_size, 1, page_size);
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return 0;
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}
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int write_49fl00x(struct flashchip *flash, uint8_t *buf)
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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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volatile uint8_t *bios = flash->virtual_memory;
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/* unprotected */
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write_lockbits_49fl00x(flash->virtual_registers, total_size, 0,
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page_size);
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printf("Programming page: ");
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for (i = 0; i < total_size / page_size; i++) {
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if ((i >= exclude_start_page) && (i < exclude_end_page))
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continue;
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/* erase the page before programming */
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erase_block_jedec(bios, i * page_size);
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/* write to the sector */
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printf("%04d at address: 0x%08x", i, i * page_size);
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write_sector_jedec(bios, buf + i * page_size,
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bios + i * page_size, page_size);
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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");
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fflush(stdout);
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}
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printf("\n");
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/* protected */
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write_lockbits_49fl00x(flash->virtual_registers, total_size, 1,
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page_size);
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return 0;
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}
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