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authorHung-Te Lin <hungte@chromium.org>2013-01-25 12:42:40 +0800
committerAnton Kochkov <anton.kochkov@gmail.com>2013-02-12 11:34:20 +0100
commitd01d0368f492b84ea093875f918086a23bc0ec7a (patch)
tree0ac1a85b0f3ed68d16d10a32dd2b025f391bc382 /payloads/libpayload/libcbfs/ram_media.c
parent02ae0bf8feb554ab408a9129fd9fffd1dc4cf6aa (diff)
downloadcoreboot-d01d0368f492b84ea093875f918086a23bc0ec7a.tar.xz
libpayload: New CBFS to support multiple firmware media sources.
Upgrade CBFS in libpayload to use new media-based implementation from coreboot ( http://review.coreboot.org/#/c/2182/ ). Old CBFS functions (cbfs_find, cbfs_find_file, get_cbfs_header) are still supported, although the recommended way is to use new CBFS API. To migrate your existing x86 payload source: - Change cbfs_find to cbfs_get_file - Change cbfs_find_file to cbfs_get_file_content - Prefix every CBFS call with a CBFS_DEFAULT_MEDIA argument. Ex, char *jpeg_data = cbfs_find_file("splash.jpg", CBFS_TYPE_BOOTSPLASH); => char *jpeg_data = cbfs_get_file_content( CBFS_DEFAULT_MEDIA, "splash.jpg", CBFS_TYPE_BOOTSPLASH); The legacy setup_cbfs_from_{ram,flash} is also supported, although the better equivalent is to make a new media instance: struct cbfs_media ram_media; init_cbfs_ram_media(&ram_media, start, size); char *data = cbfs_get_file_content(&ram_media, "myfile", my_type); Verified by being successfully linked with filo. Change-Id: If797bc7e3ba975d7e3be905c59424f7a93b8ce11 Signed-off-by: Hung-Te Lin <hungte@chromium.org> Reviewed-on: http://review.coreboot.org/2191 Tested-by: build bot (Jenkins) Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Reviewed-by: Anton Kochkov <anton.kochkov@gmail.com>
Diffstat (limited to 'payloads/libpayload/libcbfs/ram_media.c')
-rw-r--r--payloads/libpayload/libcbfs/ram_media.c114
1 files changed, 114 insertions, 0 deletions
diff --git a/payloads/libpayload/libcbfs/ram_media.c b/payloads/libpayload/libcbfs/ram_media.c
new file mode 100644
index 0000000000..87b5292b63
--- /dev/null
+++ b/payloads/libpayload/libcbfs/ram_media.c
@@ -0,0 +1,114 @@
+/*
+ * This file is part of the libpayload project.
+ *
+ * Copyright (C) 2013 Google, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+#include <cbfs.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+// Implementation of a media source based on given memory buffer.
+struct ram_media {
+ char *start;
+ size_t size;
+};
+
+static int ram_open(struct cbfs_media *media) {
+ return 0;
+}
+
+static void *ram_map(struct cbfs_media *media, size_t offset, size_t count) {
+ struct ram_media *m = (struct ram_media*)media->context;
+ if (offset + count >= m->size) {
+ printf("ERROR: ram_map: request out of range (0x%x+0x%x)\n",
+ offset, count);
+ return NULL;
+ }
+ return (void*)(m->start + offset);
+}
+
+static void *ram_unmap(struct cbfs_media *media, const void *address) {
+ return NULL;
+}
+
+static size_t ram_read(struct cbfs_media *media, void *dest, size_t offset,
+ size_t count) {
+ void *ptr = ram_map(media, offset, count);
+ memcpy(dest, ptr, count);
+ ram_unmap(media, ptr);
+ return count;
+}
+
+static int ram_close(struct cbfs_media *media) {
+ return 0;
+}
+
+int init_cbfs_ram_media(struct cbfs_media *media, void *start, size_t size);
+int init_cbfs_ram_media(struct cbfs_media *media, void *start, size_t size) {
+ // TODO Find a way to release unused media. Maybe adding media->destroy.
+ struct ram_media *m = (struct ram_media*)malloc(sizeof(*m));
+ m->start = start;
+ m->size = size;
+ media->context = (void*)m;
+ media->open = ram_open;
+ media->close = ram_close;
+ media->map = ram_map;
+ media->unmap = ram_unmap;
+ media->read = ram_read;
+ return 0;
+}
+
+// Legacy setup_cbfs_from_*.
+static int is_default_cbfs_media_initialized;
+static struct cbfs_media default_cbfs_media;
+
+int setup_cbfs_from_ram(void *start, uint32_t size);
+int setup_cbfs_from_ram(void *start, uint32_t size) {
+ int result = init_cbfs_ram_media(&default_cbfs_media, start, size);
+ if (result == 0)
+ is_default_cbfs_media_initialized = 1;
+ return result;
+}
+
+extern int libpayload_init_default_cbfs_media(struct cbfs_media *media);
+int setup_cbfs_from_flash(void);
+int setup_cbfs_from_flash(void) {
+ int result = libpayload_init_default_cbfs_media(&default_cbfs_media);
+ if (result == 0)
+ is_default_cbfs_media_initialized = 1;
+ return result;
+}
+
+int init_default_cbfs_media(struct cbfs_media *media) {
+ int result = 0;
+ if (is_default_cbfs_media_initialized != 1) {
+ result = setup_cbfs_from_flash();
+ }
+ if (result == 0)
+ memcpy(media, &default_cbfs_media, sizeof(*media));
+ return result;
+}