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// *******************************************************************
//
// (c) Copyright Cisco 2000
// All Rights Reserved
//
// *******************************************************************
#include <stdio.h>
#include <sysLib.h>
#include "mch/post.h"
void MPC860MemTest(void)
{
// First validate the MPC860 SDRAM by writing a walking one pattern and a
// walking zero pattern. Each memory location is saved prior to testing a
// location and restored after testing.
unsigned int save, read, write;
unsigned int errs = 0;
// Loop through all MPC860 SDRAM.
for (unsigned int *addr = 0; addr < (unsigned int *)sysMemTop(); addr++)
{
// Do not test the memory used to execute this code.
if (((char *)*addr < pText) && ((char *)*addr > (pText+POT_MEM_SIZE)) && ((char **)*addr != &pText) &&
((char **)*addr != &pData) && ((char **)*addr != &pBSS))
{
save = *addr;
write = 0x80000000;
for(; write; write>>=1)
{
*addr = write;
read = *addr;
if (read != write)
errs++;
*addr = ~write;
read = *addr;
if (read != ~write)
errs++;
}
*addr = save;
}
}
// Update the power on test status that will be checked later by root.
if (errs) PowerOnTestStatus |= MPC860_SDRAM_TEST;
}
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