From 8ca8d7665d671e10d72b8fcb4d69121d75f7906e Mon Sep 17 00:00:00 2001
From: Eric Biederman <ebiederm@xmission.com>
Date: Tue, 22 Apr 2003 19:02:15 +0000
Subject: - Initial checkin of the freebios2 tree

git-svn-id: svn://svn.coreboot.org/coreboot/trunk@784 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
---
 src/ram/ramtest.c | 89 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 89 insertions(+)
 create mode 100644 src/ram/ramtest.c

(limited to 'src/ram')

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");
+}
+
-- 
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