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static void write_phys(unsigned long addr, unsigned long value)
{
#if HAVE_MOVNTI
asm volatile(
"movnti %1, (%0)"
: /* outputs */
: "r" (addr), "r" (value) /* inputs */
#ifndef __GNUC__
: /* clobbers */
#endif
);
#else
volatile unsigned long *ptr;
ptr = (void *)addr;
*ptr = value;
#endif
}
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.
*/
print_debug("DRAM fill: ");
print_debug_hex32(start);
print_debug("-");
print_debug_hex32(stop);
print_debug("\r\n");
for(addr = start; addr < stop ; addr += 4) {
/* Display address being filled */
if (!(addr & 0xffff)) {
print_debug_hex32(addr);
print_debug(" \r");
}
write_phys(addr, addr);
};
/* Display final address */
print_debug_hex32(addr);
print_debug("\r\nDRAM filled\r\n");
}
static void ram_verify(unsigned long start, unsigned long stop)
{
unsigned long addr;
int i = 0;
/*
* Verify.
*/
print_debug("DRAM verify: ");
print_debug_hex32(start);
print_debug_char('-');
print_debug_hex32(stop);
print_debug("\r\n");
for(addr = start; addr < stop ; addr += 4) {
unsigned long value;
/* Display address being tested */
if (!(addr & 0xffff)) {
print_debug_hex32(addr);
print_debug(" \r");
}
value = read_phys(addr);
if (value != addr) {
/* Display address with error */
print_err("Fail: @0x");
print_err_hex32(addr);
print_err(" Read value=0x");
print_err_hex32(value);
print_err("\r\n");
i++;
if(i>256) {
print_debug("Aborting.\n\r");
break;
}
}
}
/* Display final address */
print_debug_hex32(addr);
if (i) {
print_debug("\r\nDRAM did _NOT_ verify!\r\n");
}
else {
print_debug("\r\nDRAM range verified.\r\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
*/
print_debug("Testing DRAM : ");
print_debug_hex32(start);
print_debug("-");
print_debug_hex32(stop);
print_debug("\r\n");
ram_fill(start, stop);
ram_verify(start, stop);
print_debug("Done.\r\n");
}
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