Trying to make this general purpose user-land flash burner
Corresponding to coreboot v1 svn r489.
diff --git a/spd_dump.c b/spd_dump.c
new file mode 100644
index 0000000..f45ef31
--- /dev/null
+++ b/spd_dump.c
@@ -0,0 +1,136 @@
+/*
+ * acpi_reset.c: Reboot your LinuxBIOS system with ACPI software watchdo
+ *
+ *
+ * Copyright 2000 Silicon Integrated System Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ *
+ * Reference:
+ * 1. SiS 630 Specification
+ *
+ * $Id$
+ */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <sys/mman.h>
+#include <sys/io.h>
+#include <unistd.h>
+#include <stdio.h>
+
+unsigned short acpi_base;
+
+void
+waitsmbus()
+{
+ unsigned short port = acpi_base;
+ unsigned char val;
+
+ //printf("waitsmb ..\n");
+
+ for (val = inb(port); (val & 8) == 0; val = inb(port))
+ ;
+ //printf("past first test\n");
+}
+
+void
+setsmbus(unsigned char index, unsigned char value)
+{
+ unsigned short port = acpi_base + index;
+
+ //printf("setsmbus: index 0x%02x, value 0x%02x\n",
+ // index, value);
+
+ outb(value, port);
+}
+
+unsigned char
+getsmbus(unsigned char index)
+{
+ unsigned short port = acpi_base + index;
+ unsigned char value;
+
+ value = inb(port);
+
+ //printf("getsmbus: index 0x%02x, value 0x%02x\n",
+ // index, value);
+
+ return value;
+}
+
+unsigned char
+read_spd(unsigned char slot, unsigned char index)
+{
+ unsigned char value;
+
+ setsmbus(0x03, 0x20);
+
+ setsmbus(0x04, 0xA1 + (slot << 1));
+
+ setsmbus(0x05, index);
+
+ setsmbus(0x03, 0x12);
+
+ waitsmbus();
+
+ value = getsmbus(0x08);
+
+ setsmbus(0x00, 0xFF);
+
+ return value;
+}
+
+main()
+{
+ unsigned char b;
+ unsigned short w;
+
+
+ /* get io privilege access PCI configuration space */
+ if (iopl(3) != 0) {
+ perror("Can not set io priviliage");
+ exit(1);
+ }
+
+ /* Enable ACPI by set B7 on Reg 0x40, LPC */
+ outl(0x80000840, 0x0cf8);
+ b = inb(0x0cfc) | 0x80;
+ outb(b, 0xcfc);
+
+ /* get the ACPI base address for register 0x74,0x75 of LPC */
+ outl(0x80000874, 0x0cf8);
+ w = inw(0x0cfc);
+ acpi_base = w + 0x80;
+
+ printf("Number of bytes used by module manufacturer 0x%02x\n",
+ read_spd(0x00, 0x00));
+
+ printf("Memory Type 0x%02x\n",
+ read_spd(0x00, 0x02));
+
+ printf("Number of Row Address bits 0x%02x\n",
+ read_spd(0x00, 0x03));
+
+ printf("Number of Column Address bits 0x%02x\n",
+ read_spd(0x00, 0x04));
+
+ printf("Number of Sides 0x%02x\n",
+ read_spd(0x00, 0x05));
+
+ printf("Number of Banks 0x%02x\n",
+ read_spd(0x00, 0x11));
+}