574 lines
13 KiB
C
574 lines
13 KiB
C
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/*
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* (C) Copyright 2001
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* Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc.
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*
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* (C) Copyright 2002
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (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., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <config.h>
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#include <common.h>
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#include <flash.h>
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#include <asm/io.h>
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/*---------------------------------------------------------------------*/
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#undef DEBUG_FLASH
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#ifdef DEBUG_FLASH
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#define DEBUGF(fmt,args...) printf(fmt ,##args)
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#else
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#define DEBUGF(fmt,args...)
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#endif
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/*---------------------------------------------------------------------*/
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flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
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static ulong flash_get_size (ulong addr, flash_info_t *info);
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static int flash_get_offsets (ulong base, flash_info_t *info);
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static int write_word (flash_info_t *info, ulong dest, ulong data);
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static void flash_reset (ulong addr);
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unsigned long flash_init (void)
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{
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unsigned int i;
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unsigned long flash_size = 0;
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/* Init: no FLASHes known */
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for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
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flash_info[i].flash_id = FLASH_UNKNOWN;
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flash_info[i].sector_count = 0;
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flash_info[i].size = 0;
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}
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DEBUGF("\n## Get flash size @ 0x%08x\n", CFG_FLASH_BASE);
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flash_size = flash_get_size (CFG_FLASH_BASE, flash_info);
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DEBUGF("## Flash bank size: %08lx\n", flash_size);
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if (flash_size) {
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#if CFG_MONITOR_BASE >= CFG_FLASH_BASE && \
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CFG_MONITOR_BASE < CFG_FLASH_BASE + CFG_FLASH_MAX_SIZE
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/* monitor protection ON by default */
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flash_protect(FLAG_PROTECT_SET,
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CFG_MONITOR_BASE,
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CFG_MONITOR_BASE + monitor_flash_len - 1,
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&flash_info[0]);
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#endif
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#ifdef CFG_ENV_IS_IN_FLASH
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/* ENV protection ON by default */
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flash_protect(FLAG_PROTECT_SET,
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CFG_ENV_ADDR,
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CFG_ENV_ADDR + CFG_ENV_SECT_SIZE - 1,
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&flash_info[0]);
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#endif
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} else {
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puts ("Warning: the BOOT Flash is not initialised !");
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}
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return flash_size;
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}
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/*
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* The following code cannot be run from FLASH!
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*/
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static ulong flash_get_size (ulong addr, flash_info_t *info)
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{
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short i;
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uchar value;
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/* Write auto select command: read Manufacturer ID */
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out8(addr + 0x0555, 0xAA);
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iobarrier_rw();
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out8(addr + 0x02AA, 0x55);
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iobarrier_rw();
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out8(addr + 0x0555, 0x90);
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iobarrier_rw();
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value = in8(addr);
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iobarrier_rw();
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DEBUGF("Manuf. ID @ 0x%08lx: 0x%08x\n", (ulong)addr, value);
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switch (value | (value << 16)) {
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case AMD_MANUFACT:
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info->flash_id = FLASH_MAN_AMD;
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break;
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case FUJ_MANUFACT:
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info->flash_id = FLASH_MAN_FUJ;
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break;
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case STM_MANUFACT:
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info->flash_id = FLASH_MAN_STM;
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break;
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default:
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info->flash_id = FLASH_UNKNOWN;
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info->sector_count = 0;
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info->size = 0;
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flash_reset (addr);
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return 0;
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}
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value = in8(addr + 1); /* device ID */
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iobarrier_rw();
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DEBUGF("Device ID @ 0x%08lx: 0x%08x\n", addr+1, value);
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switch ((ulong)value) {
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case AMD_ID_F040B:
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DEBUGF("Am29F040B\n");
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info->flash_id += FLASH_AM040;
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info->sector_count = 8;
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info->size = 0x00080000;
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break; /* => 512 kB */
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case AMD_ID_LV040B:
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DEBUGF("Am29LV040B\n");
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info->flash_id += FLASH_AM040;
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info->sector_count = 8;
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info->size = 0x00080000;
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break; /* => 512 kB */
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case AMD_ID_LV400T:
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DEBUGF("Am29LV400T\n");
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info->flash_id += FLASH_AM400T;
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info->sector_count = 11;
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info->size = 0x00100000;
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break; /* => 1 MB */
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case AMD_ID_LV400B:
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DEBUGF("Am29LV400B\n");
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info->flash_id += FLASH_AM400B;
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info->sector_count = 11;
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info->size = 0x00100000;
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break; /* => 1 MB */
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case AMD_ID_LV800T:
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DEBUGF("Am29LV800T\n");
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info->flash_id += FLASH_AM800T;
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info->sector_count = 19;
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info->size = 0x00200000;
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break; /* => 2 MB */
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case AMD_ID_LV800B:
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DEBUGF("Am29LV400B\n");
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info->flash_id += FLASH_AM800B;
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info->sector_count = 19;
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info->size = 0x00200000;
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break; /* => 2 MB */
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case AMD_ID_LV160T:
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DEBUGF("Am29LV160T\n");
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info->flash_id += FLASH_AM160T;
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info->sector_count = 35;
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info->size = 0x00400000;
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break; /* => 4 MB */
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case AMD_ID_LV160B:
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DEBUGF("Am29LV160B\n");
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info->flash_id += FLASH_AM160B;
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info->sector_count = 35;
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info->size = 0x00400000;
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break; /* => 4 MB */
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case AMD_ID_LV320T:
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DEBUGF("Am29LV320T\n");
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info->flash_id += FLASH_AM320T;
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info->sector_count = 67;
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info->size = 0x00800000;
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break; /* => 8 MB */
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#if 0
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/* Has the same ID as AMD_ID_LV320T, to be fixed */
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case AMD_ID_LV320B:
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DEBUGF("Am29LV320B\n");
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info->flash_id += FLASH_AM320B;
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info->sector_count = 67;
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info->size = 0x00800000;
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break; /* => 8 MB */
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#endif
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case AMD_ID_LV033C:
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DEBUGF("Am29LV033C\n");
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info->flash_id += FLASH_AM033C;
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info->sector_count = 64;
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info->size = 0x01000000;
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break; /* => 16Mb */
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case STM_ID_F040B:
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DEBUGF("M29F040B\n");
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info->flash_id += FLASH_AM040;
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info->sector_count = 8;
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info->size = 0x00080000;
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break; /* => 512 kB */
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default:
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info->flash_id = FLASH_UNKNOWN;
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flash_reset (addr);
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return (0); /* => no or unknown flash */
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}
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if (info->sector_count > CFG_MAX_FLASH_SECT) {
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printf ("** ERROR: sector count %d > max (%d) **\n",
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info->sector_count, CFG_MAX_FLASH_SECT);
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info->sector_count = CFG_MAX_FLASH_SECT;
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}
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if (! flash_get_offsets (addr, info)) {
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flash_reset (addr);
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return 0;
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}
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/* check for protected sectors */
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for (i = 0; i < info->sector_count; i++) {
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/* read sector protection at sector address, (A7 .. A0) = 0x02 */
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/* D0 = 1 if protected */
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value = in8(info->start[i] + 2);
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iobarrier_rw();
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info->protect[i] = (value & 1) != 0;
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}
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/*
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* Reset bank to read mode
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*/
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flash_reset (addr);
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return (info->size);
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}
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static int flash_get_offsets (ulong base, flash_info_t *info)
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{
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unsigned int i;
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switch (info->flash_id & FLASH_TYPEMASK) {
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case FLASH_AM040:
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/* set sector offsets for uniform sector type */
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for (i = 0; i < info->sector_count; i++) {
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info->start[i] = base + i * info->size /
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info->sector_count;
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}
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break;
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default:
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return 0;
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}
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return 1;
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}
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int flash_erase (flash_info_t *info, int s_first, int s_last)
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{
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volatile ulong addr = info->start[0];
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int flag, prot, sect, l_sect;
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ulong start, now, last;
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if (s_first < 0 || s_first > s_last) {
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if (info->flash_id == FLASH_UNKNOWN) {
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printf ("- missing\n");
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} else {
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printf ("- no sectors to erase\n");
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}
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return 1;
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}
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if (info->flash_id == FLASH_UNKNOWN) {
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printf ("Can't erase unknown flash type %08lx - aborted\n",
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info->flash_id);
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return 1;
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}
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prot = 0;
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for (sect=s_first; sect<=s_last; ++sect) {
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if (info->protect[sect]) {
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prot++;
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}
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}
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if (prot) {
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printf ("- Warning: %d protected sectors will not be erased!\n",
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prot);
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} else {
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printf ("\n");
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}
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l_sect = -1;
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/* Disable interrupts which might cause a timeout here */
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flag = disable_interrupts();
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out8(addr + 0x555, 0xAA);
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iobarrier_rw();
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out8(addr + 0x2AA, 0x55);
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iobarrier_rw();
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out8(addr + 0x555, 0x80);
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iobarrier_rw();
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out8(addr + 0x555, 0xAA);
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iobarrier_rw();
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out8(addr + 0x2AA, 0x55);
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iobarrier_rw();
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/* Start erase on unprotected sectors */
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for (sect = s_first; sect<=s_last; sect++) {
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if (info->protect[sect] == 0) { /* not protected */
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addr = info->start[sect];
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out8(addr, 0x30);
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iobarrier_rw();
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l_sect = sect;
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}
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}
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/* re-enable interrupts if necessary */
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if (flag)
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enable_interrupts();
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/* wait at least 80us - let's wait 1 ms */
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udelay (1000);
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/*
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* We wait for the last triggered sector
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*/
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if (l_sect < 0)
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goto DONE;
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start = get_timer (0);
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last = start;
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addr = info->start[l_sect];
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DEBUGF ("Start erase timeout: %d\n", CFG_FLASH_ERASE_TOUT);
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while ((in8(addr) & 0x80) != 0x80) {
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if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
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printf ("Timeout\n");
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flash_reset (info->start[0]);
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return 1;
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}
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/* show that we're waiting */
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if ((now - last) > 1000) { /* every second */
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putc ('.');
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last = now;
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}
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iobarrier_rw();
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}
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DONE:
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/* reset to read mode */
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flash_reset (info->start[0]);
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printf (" done\n");
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return 0;
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}
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/*
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* Copy memory to flash, returns:
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* 0 - OK
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* 1 - write timeout
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* 2 - Flash not erased
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*/
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int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
|
||
|
|
{
|
||
|
|
ulong cp, wp, data;
|
||
|
|
int i, l, rc;
|
||
|
|
|
||
|
|
wp = (addr & ~3); /* get lower word aligned address */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* handle unaligned start bytes
|
||
|
|
*/
|
||
|
|
if ((l = addr - wp) != 0) {
|
||
|
|
data = 0;
|
||
|
|
for (i=0, cp=wp; i<l; ++i, ++cp) {
|
||
|
|
data = (data << 8) | (*(uchar *)cp);
|
||
|
|
}
|
||
|
|
for (; i<4 && cnt>0; ++i) {
|
||
|
|
data = (data << 8) | *src++;
|
||
|
|
--cnt;
|
||
|
|
++cp;
|
||
|
|
}
|
||
|
|
for (; cnt==0 && i<4; ++i, ++cp) {
|
||
|
|
data = (data << 8) | (*(uchar *)cp);
|
||
|
|
}
|
||
|
|
|
||
|
|
if ((rc = write_word(info, wp, data)) != 0) {
|
||
|
|
return (rc);
|
||
|
|
}
|
||
|
|
wp += 4;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* handle word aligned part
|
||
|
|
*/
|
||
|
|
while (cnt >= 4) {
|
||
|
|
data = 0;
|
||
|
|
for (i=0; i<4; ++i) {
|
||
|
|
data = (data << 8) | *src++;
|
||
|
|
}
|
||
|
|
if ((rc = write_word(info, wp, data)) != 0) {
|
||
|
|
return (rc);
|
||
|
|
}
|
||
|
|
wp += 4;
|
||
|
|
cnt -= 4;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (cnt == 0) {
|
||
|
|
return (0);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* handle unaligned tail bytes
|
||
|
|
*/
|
||
|
|
data = 0;
|
||
|
|
for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
|
||
|
|
data = (data << 8) | *src++;
|
||
|
|
--cnt;
|
||
|
|
}
|
||
|
|
for (; i<4; ++i, ++cp) {
|
||
|
|
data = (data << 8) | (*(uchar *)cp);
|
||
|
|
}
|
||
|
|
|
||
|
|
return (write_word(info, wp, data));
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Write a word to Flash, returns:
|
||
|
|
* 0 - OK
|
||
|
|
* 1 - write timeout
|
||
|
|
* 2 - Flash not erased
|
||
|
|
*/
|
||
|
|
static int write_word (flash_info_t *info, ulong dest, ulong data)
|
||
|
|
{
|
||
|
|
volatile ulong addr = info->start[0];
|
||
|
|
ulong start;
|
||
|
|
int i;
|
||
|
|
|
||
|
|
/* Check if Flash is (sufficiently) erased */
|
||
|
|
if ((in32(dest) & data) != data) {
|
||
|
|
return (2);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* write each byte out */
|
||
|
|
for (i = 0; i < 4; i++) {
|
||
|
|
char *data_ch = (char *)&data;
|
||
|
|
int flag = disable_interrupts();
|
||
|
|
|
||
|
|
out8(addr + 0x555, 0xAA);
|
||
|
|
iobarrier_rw();
|
||
|
|
out8(addr + 0x2AA, 0x55);
|
||
|
|
iobarrier_rw();
|
||
|
|
out8(addr + 0x555, 0xA0);
|
||
|
|
iobarrier_rw();
|
||
|
|
out8(dest+i, data_ch[i]);
|
||
|
|
iobarrier_rw();
|
||
|
|
|
||
|
|
/* re-enable interrupts if necessary */
|
||
|
|
if (flag)
|
||
|
|
enable_interrupts();
|
||
|
|
|
||
|
|
/* data polling for D7 */
|
||
|
|
start = get_timer (0);
|
||
|
|
while ((in8(dest+i) & 0x80) != (data_ch[i] & 0x80)) {
|
||
|
|
if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
|
||
|
|
flash_reset (addr);
|
||
|
|
return (1);
|
||
|
|
}
|
||
|
|
iobarrier_rw();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
flash_reset (addr);
|
||
|
|
return (0);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Reset bank to read mode
|
||
|
|
*/
|
||
|
|
static void flash_reset (ulong addr)
|
||
|
|
{
|
||
|
|
out8(addr, 0xF0); /* reset bank */
|
||
|
|
iobarrier_rw();
|
||
|
|
}
|
||
|
|
|
||
|
|
void flash_print_info (flash_info_t *info)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
|
||
|
|
if (info->flash_id == FLASH_UNKNOWN) {
|
||
|
|
printf ("missing or unknown FLASH type\n");
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
switch (info->flash_id & FLASH_VENDMASK) {
|
||
|
|
case FLASH_MAN_AMD: printf ("AMD "); break;
|
||
|
|
case FLASH_MAN_FUJ: printf ("FUJITSU "); break;
|
||
|
|
case FLASH_MAN_BM: printf ("BRIGHT MICRO "); break;
|
||
|
|
case FLASH_MAN_STM: printf ("SGS THOMSON "); break;
|
||
|
|
default: printf ("Unknown Vendor "); break;
|
||
|
|
}
|
||
|
|
|
||
|
|
switch (info->flash_id & FLASH_TYPEMASK) {
|
||
|
|
case FLASH_AM040: printf ("29F040 or 29LV040 (4 Mbit, uniform sectors)\n");
|
||
|
|
break;
|
||
|
|
case FLASH_AM400B: printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
|
||
|
|
break;
|
||
|
|
case FLASH_AM400T: printf ("AM29LV400T (4 Mbit, top boot sector)\n");
|
||
|
|
break;
|
||
|
|
case FLASH_AM800B: printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
|
||
|
|
break;
|
||
|
|
case FLASH_AM800T: printf ("AM29LV800T (8 Mbit, top boot sector)\n");
|
||
|
|
break;
|
||
|
|
case FLASH_AM160B: printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
|
||
|
|
break;
|
||
|
|
case FLASH_AM160T: printf ("AM29LV160T (16 Mbit, top boot sector)\n");
|
||
|
|
break;
|
||
|
|
case FLASH_AM320B: printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
|
||
|
|
break;
|
||
|
|
case FLASH_AM320T: printf ("AM29LV320T (32 Mbit, top boot sector)\n");
|
||
|
|
break;
|
||
|
|
default: printf ("Unknown Chip Type\n");
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (info->size % 0x100000 == 0) {
|
||
|
|
printf (" Size: %ld MB in %d Sectors\n",
|
||
|
|
info->size / 0x100000, info->sector_count);
|
||
|
|
} else if (info->size % 0x400 == 0) {
|
||
|
|
printf (" Size: %ld KB in %d Sectors\n",
|
||
|
|
info->size / 0x400, info->sector_count);
|
||
|
|
} else {
|
||
|
|
printf (" Size: %ld B in %d Sectors\n",
|
||
|
|
info->size, info->sector_count);
|
||
|
|
}
|
||
|
|
|
||
|
|
printf (" Sector Start Addresses:");
|
||
|
|
for (i=0; i<info->sector_count; ++i) {
|
||
|
|
if ((i % 5) == 0)
|
||
|
|
printf ("\n ");
|
||
|
|
printf (" %08lX%s",
|
||
|
|
info->start[i],
|
||
|
|
info->protect[i] ? " (RO)" : " "
|
||
|
|
);
|
||
|
|
}
|
||
|
|
printf ("\n");
|
||
|
|
}
|