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");
+}
+