libpayload: initial test case + tiny "framework"

This adds a test case for using CBFS images that reside in RAM
and a Makefile to run it (and maybe other tests in the future).

The test concerns an issue in libcbfs when using x86 style CBFS
images in non-canonical locations (eg. when loading CBFS images
for processing).

Use with "make run" inside the tests directory.

Change-Id: I1af3792a1451728ff9594ba7f0410027cdecb59d
Signed-off-by: Patrick Georgi <patrick@georgi-clan.de>
Reviewed-on: http://review.coreboot.org/2623
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

payloads/libpayload/tests/Makefile

@@ -0,0 +1,13 @@
+CC=gcc -g -m32
+INCLUDES=-I. -I../include -I../include/x86
+TARGETS=cbfs-x86-test
+
+cbfs-x86-test: cbfs-x86-test.c ../arch/x86/rom_media.c ../libcbfs/ram_media.c ../libcbfs/cbfs.c
+	$(CC) -o $@ $^ $(INCLUDES)
+
+
+all: $(TARGETS)
+
+run: all
+	for i in $(TARGETS); do ./$$i; done
+

payloads/libpayload/tests/cbfs-x86-test.c

@@ -0,0 +1,34 @@
+/* system headers */
+#include <stdlib.h>
+#include <stdio.h>
+
+/* libpayload headers */
+#include "cbfs.h"
+
+int fail(const char* str)
+{
+	fprintf(stderr, "%s", str);
+	exit(1);
+}
+
+int main(int argc, char** argv)
+{
+	FILE *cbfs = fopen("data/cbfs-x86.bin", "rb");
+	if (!cbfs) fail("could not open test file\n");
+	if (fseek(cbfs, 0, SEEK_END) != 0) fail("seek to end failed\n");
+
+	long size = ftell(cbfs);
+	if (size == -1) fail("could not determine file size\n");
+	if (fseek(cbfs, 0, SEEK_SET) != 0) fail("seek to start failed\n");
+
+	void *data = malloc(size);
+	if (!data) fail("could not allocate buffer\n");
+
+	if (fread(data, size, 1, cbfs) != 1) fail("could not read data\n");
+	if (fclose(cbfs)) fail("could not close file\n");
+
+	if (setup_cbfs_from_ram(data, size) != 0) fail("could not setup CBFS in RAM\n");
+	struct cbfs_file *file = cbfs_find("foo");
+	if (file == NULL) fail("could not find file in CBFS\n");
+	exit(0);
+}

payloads/libpayload/tests/libpayload-config.h

@@ -0,0 +1,30 @@
+/*
+ * Automatically generated C config: don't edit
+ * libpayload version: 0.2.0
+ * Sat Mar  9 10:22:45 2013
+ */
+#define AUTOCONF_INCLUDED
+#define CONFIG_SPEAKER 1
+#define CONFIG_STORAGE 1
+#define CONFIG_LIBC 1
+#define CONFIG_CBFS 1
+#define CONFIG_VGA_VIDEO_CONSOLE 1
+#define CONFIG_SERIAL_CONSOLE 1
+#define CONFIG_PC_KEYBOARD 1
+#define CONFIG_ARCH_X86 1
+#define CONFIG_STORAGE_ATA 1
+#define CONFIG_ARCH_SPECIFIC_OPTIONS 1
+#define CONFIG_STORAGE_AHCI_ONLY_TESTED 1
+#define CONFIG_X86_SERIAL_CONSOLE 1
+#define CONFIG_PDCURSES 1
+#define CONFIG_NVRAM 1
+#define CONFIG_PC_KEYBOARD_LAYOUT_US 1
+#define CONFIG_STORAGE_AHCI 1
+#define CONFIG_MULTIBOOT 1
+#define CONFIG_SERIAL_IOBASE 0x3f8
+#define CONFIG_CURSES 1
+#define CONFIG_CBMEM_CONSOLE 1
+#define CONFIG_LITTLE_ENDIAN 1
+#define CONFIG_PCI 1
+#define CONFIG_STORAGE_ATAPI 1
+#define CONFIG_VIDEO_CONSOLE 1