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Add a non-time consuming version of ram check so we can print a decent error 

rather than looping on non-working ram.

Signed-off-by: Stefan Reinauer <stepan@coresystems.de>
Acked-by: Stefan Reinauer <stepan@coresystems.de>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@5309 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Stefan Reinauer 2010-03-28 21:31:30 +00:00 committed by Stefan Reinauer
parent bcd31fff42
commit e0d607a4c5
2 changed files with 56 additions and 8 deletions
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62
src/lib/ramtest.c
View File

@ -1,6 +1,6 @@
#include <lib.h> /* Prototypes */
static void write_phys(unsigned long addr, unsigned long value)
static void write_phys(unsigned long addr, u32 value)
{
// Assembler in lib/ is very ugly. But we properly guarded
// it so let's obey this one for now
@ -9,7 +9,7 @@ static void write_phys(unsigned long addr, unsigned long value)
"movnti %1, (%0)"
: /* outputs */
: "r" (addr), "r" (value) /* inputs */
#ifndef __GNUC__
#ifndef __GNUC__ /* GCC does not like empty clobbers? */
: /* clobbers */
#endif
);
@ -20,13 +20,31 @@ static void write_phys(unsigned long addr, unsigned long value)
#endif
}
static unsigned long read_phys(unsigned long addr)
static u32 read_phys(unsigned long addr)
{
volatile unsigned long *ptr;
ptr = (void *)addr;
return *ptr;
}
static void phys_memory_barrier(void)
{
#if CONFIG_SSE2
// Needed for movnti
asm volatile (
"sfence"
::
#ifdef __GNUC__ /* ROMCC does not like memory clobbers */
: "memory"
#endif
);
#else
#ifdef __GNUC__ /* ROMCC does not like empty asm statements */
asm volatile ("" ::: "memory");
#endif
#endif
}
static void ram_fill(unsigned long start, unsigned long stop)
{
unsigned long addr;
@ -52,12 +70,8 @@ static void ram_fill(unsigned long start, unsigned long stop)
print_debug(" \r");
#endif
}
write_phys(addr, addr);
write_phys(addr, (u32)addr);
};
#if CONFIG_SSE2
// Needed for movnti
asm volatile ("sfence" ::: "memory");
#endif
/* Display final address */
#if CONFIG_USE_PRINTK_IN_CAR
printk(BIOS_DEBUG, "%08lx\r\nDRAM filled\r\n", addr);
@ -159,6 +173,8 @@ void ram_check(unsigned long start, unsigned long stop)
print_debug("\r\n");
#endif
ram_fill(start, stop);
/* Make sure we don't read before we wrote */
phys_memory_barrier();
ram_verify(start, stop);
#if CONFIG_USE_PRINTK_IN_CAR
printk(BIOS_DEBUG, "Done.\r\n");
@ -167,3 +183,33 @@ void ram_check(unsigned long start, unsigned long stop)
#endif
}
void quick_ram_check(void)
{
int fail = 0;
u32 backup;
backup = read_phys(CONFIG_RAMBASE);
write_phys(CONFIG_RAMBASE, 0x55555555);
phys_memory_barrier();
if (read_phys(CONFIG_RAMBASE) != 0x55555555)
fail=1;
write_phys(CONFIG_RAMBASE, 0xaaaaaaaa);
phys_memory_barrier();
if (read_phys(CONFIG_RAMBASE) != 0xaaaaaaaa)
fail=1;
write_phys(CONFIG_RAMBASE, 0x00000000);
phys_memory_barrier();
if (read_phys(CONFIG_RAMBASE) != 0x00000000)
fail=1;
write_phys(CONFIG_RAMBASE, 0xffffffff);
phys_memory_barrier();
if (read_phys(CONFIG_RAMBASE) != 0xffffffff)
fail=1;
write_phys(CONFIG_RAMBASE, backup);
if (fail) {
post_code(0xea);
die("RAM INIT FAILURE!\n");
}
phys_memory_barrier();
}

2
src/mainboard/kontron/986lcd-m/romstage.c
View File

@ -455,6 +455,8 @@ void real_main(unsigned long bist)
#endif
#endif
quick_ram_check();
MCHBAR16(SSKPD) = 0xCAFE;
#if CONFIG_HAVE_ACPI_RESUME