summaryrefslogtreecommitdiff
path: root/src/ram
diff options
context:
space:
mode:
Diffstat (limited to 'src/ram')
-rw-r--r--src/ram/ramtest.c89
1 files changed, 89 insertions, 0 deletions
diff --git a/src/ram/ramtest.c b/src/ram/ramtest.c
new file mode 100644
index 0000000000..0e5e6982a3
--- /dev/null
+++ b/src/ram/ramtest.c
@@ -0,0 +1,89 @@
+static void write_phys(unsigned long addr, unsigned long value)
+{
+ unsigned long *ptr;
+ ptr = (void *)addr;
+ *ptr = value;
+}
+
+static unsigned long read_phys(unsigned long addr)
+{
+ unsigned long *ptr;
+ ptr = (void *)addr;
+ return *ptr;
+}
+
+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) == 0) {
+ 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");
+}
+
+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) == 0) {
+ 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 ramcheck(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");
+}
+