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Add ramtest for development.

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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
This commit is contained in:
Ronald G. Minnich 2008-03-06 16:35:44 +00:00
parent 689dad6eab
commit 163716a8bb
1 changed files with 108 additions and 0 deletions
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108
lib/ramtest.c Normal file
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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2001 Tyson Sawyer, irobot
* Copyright (C) 2008 Ronald G. Minnich
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* 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
*/
#include <types.h>
#include <lib.h>
#include <console.h>
static void write_phys(unsigned long addr, unsigned long value)
{
volatile unsigned long *ptr;
ptr = (void *)addr;
*ptr = value;
}
static unsigned long read_phys(unsigned long addr)
{
volatile unsigned long *ptr;
ptr = (void *)addr;
return *ptr;
}
static void ram_fill(unsigned long start, unsigned long stop)
{
unsigned long addr;
/*
* Fill.
*/
printk(BIOS_DEBUG, "DRAM fill: %lx-%lx\n", start, stop);
for(addr = start; addr < stop ; addr += 4) {
/* Display address being filled */
if (!(addr & 0xffff)) {
printk(BIOS_DEBUG, "%lx\r", addr);
}
write_phys(addr, addr);
};
/* Display final address */
printk(BIOS_DEBUG, "%lx\nDRAM filled\n", addr);
}
static void ram_verify(unsigned long start, unsigned long stop)
{
unsigned long addr;
int i = 0;
/*
* Verify.
*/
printk(BIOS_DEBUG, "DRAM verify: %lx-%lx\n", start, stop);
for(addr = start; addr < stop ; addr += 4) {
unsigned long value;
/* Display address being tested */
if (!(addr & 0xffff)) {
printk(BIOS_DEBUG, "%lx\r", addr);
}
value = read_phys(addr);
if (value != addr) {
/* Display address with error */
printk(BIOS_ERR, "Fail @%lx Read value=%lx\n",
addr, value);
i++;
if(i>256) {
printk(BIOS_ERR, "Aborting.\n");
break;
}
}
}
/* Display final address */
printk(BIOS_DEBUG, "%lx\r", addr);
if (i) {
printk(BIOS_DEBUG, "\nDRAM did _NOT_ verify!\n");
}
else {
printk(BIOS_DEBUG, "\nDRAM range verified.\n");
}
}
void ram_check(unsigned long start, unsigned long stop)
{
/*
* This is much more of a "Is my DRAM properly configured?"
* test than a "Is my DRAM faulty?" test. Not all bits
* are tested. -Tyson
*/
printk(BIOS_DEBUG, "Testing DRAM: %lx-%lx\n", start, stop);
ram_fill(start, stop);
ram_verify(start, stop);
printk(BIOS_DEBUG, "Done.\n");
}