mirror of
https://review.coreboot.org/flashrom.git
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bfa021dd80
We want to avoid calls to strlen at runtime if the string is already known at compile time. Turns out that gcc and clang will recognize constant strings and compute the strlen result already at compile time, so trickery with sizeof only reduces readability but does not improve the code. Corresponding to flashrom svn r1352. Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net> Acked-by: Sean Nelson <audiohacked@gmail.com> Acked-by: Uwe Hermann <uwe@hermann-uwe.de>
98 lines
2.5 KiB
C
98 lines
2.5 KiB
C
/*
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* This file is part of the flashrom project.
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*
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* Copyright (C) 2010 Carl-Daniel Hailfinger
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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; version 2 of the License.
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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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* Contains the processor specific flash enables and system settings.
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*/
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#include "flash.h"
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#include "programmer.h"
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#if defined(__i386__) || defined(__x86_64__)
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int processor_flash_enable(void)
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{
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/* On x86, flash access is not processor specific except on
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* AMD Elan SC520, AMD Geode and maybe other SoC-style CPUs.
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* FIXME: Move enable_flash_cs5536 and get_flashbase_sc520 here.
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*/
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return 0;
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}
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#else
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#if defined (__MIPSEL__) && defined (__linux)
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#include <stdio.h>
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#include <string.h>
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#include <ctype.h>
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static int is_loongson(void)
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{
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FILE *cpuinfo;
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cpuinfo = fopen("/proc/cpuinfo", "rb");
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if (!cpuinfo)
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return 0;
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while (!feof(cpuinfo)) {
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char line[512], *ptr;
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if (fgets(line, sizeof(line), cpuinfo) == NULL)
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break;
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ptr = line;
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while (*ptr && isspace((unsigned char)*ptr))
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ptr++;
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/* "cpu" part appears only with some Linux versions. */
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if (strncmp(ptr, "cpu", strlen("cpu")) == 0)
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ptr += strlen("cpu");
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while (*ptr && isspace((unsigned char)*ptr))
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ptr++;
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if (strncmp(ptr, "model", strlen("model")) != 0)
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continue;
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ptr += strlen("model");
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while (*ptr && isspace((unsigned char)*ptr))
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ptr++;
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if (*ptr != ':')
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continue;
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ptr++;
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while (*ptr && isspace((unsigned char)*ptr))
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ptr++;
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fclose(cpuinfo);
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return (strncmp(ptr, "ICT Loongson-2 V0.3",
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strlen("ICT Loongson-2 V0.3")) == 0)
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|| (strncmp(ptr, "Godson2 V0.3 FPU V0.1",
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strlen("Godson2 V0.3 FPU V0.1")) == 0);
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}
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fclose(cpuinfo);
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return 0;
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}
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#endif
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int processor_flash_enable(void)
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{
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/* FIXME: detect loongson on FreeBSD and OpenBSD as well. */
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#if defined (__MIPSEL__) && defined (__linux)
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if (is_loongson()) {
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flashbase = 0x1fc00000;
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return 0;
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}
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#endif
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/* Not implemented yet. Oh well. */
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return 1;
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}
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#endif
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