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/*
* This file is part of the flashrom project.
*
* Copyright (C) 2010 Carl-Daniel Hailfinger
*
* 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; version 2 of the License.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
* Contains the processor specific flash enables and system settings.
*/
#include "flash.h"
#include "programmer.h"
#if defined (__MIPSEL__) && defined (__linux)
#include <stdio.h>
#include <string.h>
#include <ctype.h>
static int is_loongson(void)
{
FILE *cpuinfo;
cpuinfo = fopen("/proc/cpuinfo", "rb");
if (!cpuinfo)
return 0;
while (!feof(cpuinfo)) {
char line[512], *ptr;
if (fgets(line, sizeof(line), cpuinfo) == NULL)
break;
ptr = line;
while (*ptr && isspace((unsigned char)*ptr))
ptr++;
/* "cpu" part appears only with some Linux versions. */
if (strncmp(ptr, "cpu", strlen("cpu")) == 0)
ptr += strlen("cpu");
while (*ptr && isspace((unsigned char)*ptr))
ptr++;
if (strncmp(ptr, "model", strlen("model")) != 0)
continue;
ptr += strlen("model");
while (*ptr && isspace((unsigned char)*ptr))
ptr++;
if (*ptr != ':')
continue;
ptr++;
while (*ptr && isspace((unsigned char)*ptr))
ptr++;
(void)fclose(cpuinfo);
return (strncmp(ptr, "ICT Loongson-2 V0.3", strlen("ICT Loongson-2 V0.3")) == 0) ||
(strncmp(ptr, "Godson2 V0.3 FPU V0.1", strlen("Godson2 V0.3 FPU V0.1")) == 0);
}
(void)fclose(cpuinfo);
return 0;
}
#endif
int processor_flash_enable(void)
{
/* Default to 1 to catch not implemented architectures. */
int ret = 1;
/* FIXME: detect loongson on FreeBSD and OpenBSD as well. */
#if defined (__MIPSEL__) && defined (__linux)
if (is_loongson()) {
flashbase = 0x1fc00000;
ret = 0;
}
#elif defined(__i386__) || defined(__x86_64__)
/* On x86, flash access is not processor specific except on
* AMD Elan SC520, AMD Geode and maybe other SoC-style CPUs.
* FIXME: Move enable_flash_cs5536 and get_flashbase_sc520 here.
*/
ret = 0;
#endif
return ret;
}
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