mirror of
https://github.com/fail0verflow/switch-coreboot.git
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163716a8bb
Signed-off-by: Ronald G. Minnich <rminnich@gmail.com> Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net> git-svn-id: svn://coreboot.org/repository/coreboot-v3@633 f3766cd6-281f-0410-b1cd-43a5c92072e9
108 lines
2.7 KiB
C
108 lines
2.7 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 2001 Tyson Sawyer, irobot
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* Copyright (C) 2008 Ronald G. Minnich
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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 <types.h>
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#include <lib.h>
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#include <console.h>
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static void write_phys(unsigned long addr, unsigned long value)
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{
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volatile unsigned long *ptr;
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ptr = (void *)addr;
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*ptr = value;
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}
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static unsigned long read_phys(unsigned long addr)
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{
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volatile unsigned long *ptr;
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ptr = (void *)addr;
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return *ptr;
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}
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static void ram_fill(unsigned long start, unsigned long stop)
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{
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unsigned long addr;
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/*
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* Fill.
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*/
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printk(BIOS_DEBUG, "DRAM fill: %lx-%lx\n", start, stop);
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for(addr = start; addr < stop ; addr += 4) {
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/* Display address being filled */
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if (!(addr & 0xffff)) {
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printk(BIOS_DEBUG, "%lx\r", addr);
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}
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write_phys(addr, addr);
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};
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/* Display final address */
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printk(BIOS_DEBUG, "%lx\nDRAM filled\n", addr);
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}
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static void ram_verify(unsigned long start, unsigned long stop)
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{
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unsigned long addr;
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int i = 0;
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/*
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* Verify.
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*/
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printk(BIOS_DEBUG, "DRAM verify: %lx-%lx\n", start, stop);
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for(addr = start; addr < stop ; addr += 4) {
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unsigned long value;
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/* Display address being tested */
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if (!(addr & 0xffff)) {
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printk(BIOS_DEBUG, "%lx\r", addr);
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}
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value = read_phys(addr);
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if (value != addr) {
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/* Display address with error */
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printk(BIOS_ERR, "Fail @%lx Read value=%lx\n",
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addr, value);
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i++;
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if(i>256) {
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printk(BIOS_ERR, "Aborting.\n");
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break;
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}
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}
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}
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/* Display final address */
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printk(BIOS_DEBUG, "%lx\r", addr);
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if (i) {
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printk(BIOS_DEBUG, "\nDRAM did _NOT_ verify!\n");
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}
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else {
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printk(BIOS_DEBUG, "\nDRAM range verified.\n");
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}
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}
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void ram_check(unsigned long start, unsigned long stop)
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{
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/*
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* This is much more of a "Is my DRAM properly configured?"
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* test than a "Is my DRAM faulty?" test. Not all bits
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* are tested. -Tyson
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*/
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printk(BIOS_DEBUG, "Testing DRAM: %lx-%lx\n", start, stop);
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ram_fill(start, stop);
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ram_verify(start, stop);
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printk(BIOS_DEBUG, "Done.\n");
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}
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