diff options
Diffstat (limited to 'src/lib/ramtest.c')
| -rw-r--r-- | src/lib/ramtest.c | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/src/lib/ramtest.c b/src/lib/ramtest.c new file mode 100644 index 0000000000..9f329ef51b --- /dev/null +++ b/src/lib/ramtest.c @@ -0,0 +1,161 @@ +static void write_phys(unsigned long addr, unsigned long value) +{ +#if CONFIG_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. + */ +#if CONFIG_USE_PRINTK_IN_CAR + printk_debug("DRAM fill: 0x%08x-0x%08x\r\n", start, stop); +#else + print_debug("DRAM fill: "); + print_debug_hex32(start); + print_debug("-"); + print_debug_hex32(stop); + print_debug("\r\n"); +#endif + for(addr = start; addr < stop ; addr += 4) { + /* Display address being filled */ + if (!(addr & 0xfffff)) { +#if CONFIG_USE_PRINTK_IN_CAR + printk_debug("%08x \r", addr); +#else + print_debug_hex32(addr); + print_debug(" \r"); +#endif + } + write_phys(addr, addr); + }; + /* Display final address */ +#if CONFIG_USE_PRINTK_IN_CAR + printk_debug("%08x\r\nDRAM filled\r\n", addr); +#else + print_debug_hex32(addr); + print_debug("\r\nDRAM filled\r\n"); +#endif +} + +static void ram_verify(unsigned long start, unsigned long stop) +{ + unsigned long addr; + int i = 0; + /* + * Verify. + */ +#if CONFIG_USE_PRINTK_IN_CAR + printk_debug("DRAM verify: 0x%08x-0x%08x\r\n", start, stop); +#else + print_debug("DRAM verify: "); + print_debug_hex32(start); + print_debug_char('-'); + print_debug_hex32(stop); + print_debug("\r\n"); +#endif + for(addr = start; addr < stop ; addr += 4) { + unsigned long value; + /* Display address being tested */ + if (!(addr & 0xfffff)) { +#if CONFIG_USE_PRINTK_IN_CAR + printk_debug("%08x \r", addr); +#else + print_debug_hex32(addr); + print_debug(" \r"); +#endif + } + value = read_phys(addr); + if (value != addr) { + /* Display address with error */ +#if CONFIG_USE_PRINTK_IN_CAR + printk_err("Fail: @0x%08x Read value=0x%08x\r\n", addr, value); +#else + print_err("Fail: @0x"); + print_err_hex32(addr); + print_err(" Read value=0x"); + print_err_hex32(value); + print_err("\r\n"); +#endif + i++; + if(i>256) { +#if CONFIG_USE_PRINTK_IN_CAR + printk_debug("Aborting.\n\r"); +#else + print_debug("Aborting.\n\r"); +#endif + break; + } + } + } + /* Display final address */ +#if CONFIG_USE_PRINTK_IN_CAR + printk_debug("%08x", addr); +#else + print_debug_hex32(addr); +#endif + + if (i) { +#if CONFIG_USE_PRINTK_IN_CAR + printk_debug("\r\nDRAM did _NOT_ verify!\r\n"); +#else + print_debug("\r\nDRAM did _NOT_ verify!\r\n"); +#endif + die("DRAM ERROR"); + } + else { +#if CONFIG_USE_PRINTK_IN_CAR + printk_debug("\r\nDRAM range verified.\r\n"); +#else + print_debug("\r\nDRAM range verified.\r\n"); +#endif + } +} + + +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 + */ +#if CONFIG_USE_PRINTK_IN_CAR + printk_debug("Testing DRAM : %08x - %08x\r\n", start, stop); +#else + print_debug("Testing DRAM : "); + print_debug_hex32(start); + print_debug("-"); + print_debug_hex32(stop); + print_debug("\r\n"); +#endif + ram_fill(start, stop); + ram_verify(start, stop); +#if CONFIG_USE_PRINTK_IN_CAR + printk_debug("Done.\r\n"); +#else + print_debug("Done.\r\n"); +#endif +} + |