diff options
| author | Stefan Reinauer <stepan@coresystems.de> | 2010-03-28 21:31:30 +0000 |
|---|---|---|
| committer | Stefan Reinauer <stepan@openbios.org> | 2010-03-28 21:31:30 +0000 |
| commit | e0d607a4c5838628822904e75bdb3cd69ffa3220 (patch) | |
| tree | b0744985fec4250ec5a801ce6a7aa5e101050430 /src/lib/ramtest.c | |
| parent | bcd31fff4213345c3447f0ffffec7331dfed8c3e (diff) | |
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
Diffstat (limited to 'src/lib/ramtest.c')
| -rw-r--r-- | src/lib/ramtest.c | 62 |
1 files changed, 54 insertions, 8 deletions
diff --git a/src/lib/ramtest.c b/src/lib/ramtest.c index 5f24bc1c7d..a43101235b 100644 --- a/src/lib/ramtest.c +++ b/src/lib/ramtest.c @@ -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(); +} + |