| #if defined(i786) |
| #define HAVE_MOVNTI 1 |
| #endif |
| #if defined(k8) |
| #define HAVE_MOVNTI 1 |
| #endif |
| |
| static void write_phys(unsigned long addr, unsigned long value) |
| { |
| #if HAVE_MOVNTI |
| asm volatile( |
| "movnti %1, (%0)" |
| : /* outputs */ |
| : "r" (addr), "r" (value) /* inputs */ |
| : /* clobbers */ |
| ); |
| #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; |
| /* |
| * 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_hex32(addr); |
| print_err_char(':'); |
| print_err_hex32(value); |
| print_err("\r\n"); |
| } |
| } |
| /* Display final address */ |
| print_debug_hex32(addr); |
| print_debug("\r\nDRAM verified\r\n"); |
| } |
| |
| |
| void ram_check(unsigned long start, unsigned long stop) |
| { |
| int result; |
| /* |
| * 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.\n"); |
| } |
| |