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libpayload: New CBFS to support multiple firmware media sources.

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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>
This commit is contained in:
Hung-Te Lin
2013-01-25 12:42:40 +08:00
committed by Anton Kochkov
parent 02ae0bf8fe
commit d01d0368f4
9 changed files with 688 additions and 172 deletions
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1
payloads/libpayload/libcbfs/Makefile.inc
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@ -28,4 +28,5 @@
##
libcbfs-$(CONFIG_CBFS) += cbfs.c
libcbfs-$(CONFIG_CBFS) += ram_media.c

258
payloads/libpayload/libcbfs/cbfs.c
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@ -2,6 +2,7 @@
* This file is part of the libpayload project.
*
* Copyright (C) 2011 secunet Security Networks AG
* Copyright (C) 2013 Google, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
@ -26,80 +27,221 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#define LIBPAYLOAD
#include <endian.h>
#include <stdio.h>
#include <string.h>
#include <cbfs.h>
#ifdef CONFIG_LZMA
#define CBFS_CORE_WITH_LZMA
#include <lzma.h>
#ifdef LIBPAYLOAD
# include <libpayload-config.h>
# ifdef CONFIG_LZMA
# include <lzma.h>
# define CBFS_CORE_WITH_LZMA
# endif
# define CBFS_MINI_BUILD
#elif defined(__SMM__)
# define CBFS_MINI_BUILD
#else
# define CBFS_CORE_WITH_LZMA
# include <lib.h>
#endif
#define ERROR(x...) printf(x)
#define LOG(x...)
#include <cbfs.h>
#include <string.h>
static uint32_t host_virt_to_phys(void *addr);
static void *host_phys_to_virt(uint32_t addr);
#ifdef LIBPAYLOAD
# include <stdio.h>
# define DEBUG(x...)
# define LOG(x...) printf(x)
# define ERROR(x...) printf(x)
#else
# include <console/console.h>
# define ERROR(x...) printk(BIOS_ERR, "CBFS: " x)
# define LOG(x...) printk(BIOS_INFO, "CBFS: " x)
# if CONFIG_DEBUG_CBFS
# define DEBUG(x...) printk(BIOS_SPEW, "CBFS: " x)
# else
# define DEBUG(x...)
# endif
#endif
uint32_t romstart(void);
uint32_t romend(void);
#include <arch/virtual.h>
static uint32_t host_virt_to_phys(void *addr)
{
return virt_to_phys(addr);
}
static void *host_phys_to_virt(uint32_t addr)
{
return phys_to_virt(addr);
}
#undef virt_to_phys
#undef phys_to_virt
uint32_t (*virt_to_phys)(void *) = host_virt_to_phys;
void* (*phys_to_virt)(uint32_t) = host_phys_to_virt;
uint32_t _romstart = 0xffffffff;
uint32_t _romend = 0;
uint32_t romstart(void)
{
return _romstart;
}
uint32_t romend(void)
{
return _romend;
}
#if defined(CONFIG_CBFS_HEADER_ROM_OFFSET) && (CONFIG_CBFS_HEADER_ROM_OFFSET)
# define CBFS_HEADER_ROM_ADDRESS (CONFIG_CBFS_HEADER_ROM_OFFSET)
#else
// Indirect address: only works on 32bit top-aligned systems.
# define CBFS_HEADER_ROM_ADDRESS (*(uint32_t*)0xfffffffc)
#endif
#include "cbfs_core.c"
static uint32_t ram_cbfs_offset;
static uint32_t ram_virt_to_phys(void *addr)
#ifndef __SMM__
static inline int tohex4(unsigned int c)
{
return (uint32_t)addr - ram_cbfs_offset;
return (c <= 9) ? (c + '0') : (c - 10 + 'a');
}
static void *ram_phys_to_virt(uint32_t addr)
static void tohex16(unsigned int val, char* dest)
{
return (void*)addr + ram_cbfs_offset;
dest[0] = tohex4(val>>12);
dest[1] = tohex4((val>>8) & 0xf);
dest[2] = tohex4((val>>4) & 0xf);
dest[3] = tohex4(val & 0xf);
}
void setup_cbfs_from_ram(void* start, uint32_t size)
void *cbfs_load_optionrom(struct cbfs_media *media, uint16_t vendor,
uint16_t device, void *dest)
{
/* assumes rollover */
ram_cbfs_offset = (uint32_t)start + size;
virt_to_phys = ram_virt_to_phys;
phys_to_virt = ram_phys_to_virt;
char name[17] = "pciXXXX,XXXX.rom";
struct cbfs_optionrom *orom;
uint8_t *src;
tohex16(vendor, name+3);
tohex16(device, name+8);
orom = (struct cbfs_optionrom *)
cbfs_get_file_content(media, name, CBFS_TYPE_OPTIONROM);
if (orom == NULL)
return NULL;
/* They might have specified a dest address. If so, we can decompress.
* If not, there's not much hope of decompressing or relocating the rom.
* in the common case, the expansion rom is uncompressed, we
* pass 0 in for the dest, and all we have to do is find the rom and
* return a pointer to it.
*/
/* BUG: the cbfstool is (not yet) including a cbfs_optionrom header */
src = (uint8_t*)orom; // + sizeof(struct cbfs_optionrom);
if (! dest)
return src;
if (cbfs_decompress(ntohl(orom->compression),
src,
dest,
ntohl(orom->len)))
return NULL;
return dest;
}
void setup_cbfs_from_flash(void)
void * cbfs_load_stage(struct cbfs_media *media, const char *name)
{
virt_to_phys = host_virt_to_phys;
phys_to_virt = host_phys_to_virt;
struct cbfs_stage *stage = (struct cbfs_stage *)
cbfs_get_file_content(media, name, CBFS_TYPE_STAGE);
/* this is a mess. There is no ntohll. */
/* for now, assume compatible byte order until we solve this. */
uint32_t entry;
if (stage == NULL)
return (void *) -1;
LOG("loading stage %s @ 0x%x (%d bytes), entry @ 0x%llx\n",
name,
(uint32_t) stage->load, stage->memlen,
stage->entry);
memset((void *) (uint32_t) stage->load, 0, stage->memlen);
if (cbfs_decompress(stage->compression,
((unsigned char *) stage) +
sizeof(struct cbfs_stage),
(void *) (uint32_t) stage->load,
stage->len))
return (void *) -1;
DEBUG("stage loaded.\n");
entry = stage->entry;
// entry = ntohll(stage->entry);
return (void *) entry;
}
int cbfs_execute_stage(struct cbfs_media *media, const char *name)
{
struct cbfs_stage *stage = (struct cbfs_stage *)
cbfs_get_file_content(media, name, CBFS_TYPE_STAGE);
if (stage == NULL)
return 1;
if (ntohl(stage->compression) != CBFS_COMPRESS_NONE) {
LOG("Unable to run %s: Compressed file"
"Not supported for in-place execution\n", name);
return 1;
}
/* FIXME: This isn't right */
LOG("run @ %p\n", (void *) ntohl((uint32_t) stage->entry));
return run_address((void *)(uintptr_t)ntohll(stage->entry));
}
void *cbfs_load_payload(struct cbfs_media *media, const char *name)
{
return (struct cbfs_payload *)cbfs_get_file_content(
media, name, CBFS_TYPE_PAYLOAD);
}
struct cbfs_file *cbfs_find(const char *name) {
return cbfs_get_file(CBFS_DEFAULT_MEDIA, name);
}
void *cbfs_find_file(const char *name, int type) {
return cbfs_get_file_content(CBFS_DEFAULT_MEDIA, name, type);
}
const struct cbfs_header *get_cbfs_header(void) {
return cbfs_get_header(CBFS_DEFAULT_MEDIA);
}
/* Simple buffer */
void *cbfs_simple_buffer_map(struct cbfs_simple_buffer *buffer,
struct cbfs_media *media,
size_t offset, size_t count) {
void *address = buffer->buffer + buffer->allocated;;
DEBUG("simple_buffer_map(offset=%d, count=%d): "
"allocated=%d, size=%d, last_allocate=%d\n",
offset, count, buffer->allocated, buffer->size,
buffer->last_allocate);
if (buffer->allocated + count >= buffer->size)
return CBFS_MEDIA_INVALID_MAP_ADDRESS;
if (media->read(media, address, offset, count) != count) {
ERROR("simple_buffer: fail to read %zd bytes from 0x%zx\n",
count, offset);
return CBFS_MEDIA_INVALID_MAP_ADDRESS;
}
buffer->allocated += count;
buffer->last_allocate = count;
return address;
}
void *cbfs_simple_buffer_unmap(struct cbfs_simple_buffer *buffer,
const void *address) {
// TODO Add simple buffer management so we can free more than last
// allocated one.
DEBUG("simple_buffer_unmap(address=0x%p): "
"allocated=%d, size=%d, last_allocate=%d\n",
address, buffer->allocated, buffer->size,
buffer->last_allocate);
if ((buffer->buffer + buffer->allocated - buffer->last_allocate) ==
address) {
buffer->allocated -= buffer->last_allocate;
buffer->last_allocate = 0;
}
return NULL;
}
/**
* run_address is passed the address of a function taking no parameters and
* jumps to it, returning the result.
* @param f the address to call as a function.
* @return value returned by the function.
*/
int run_address(void *f)
{
int (*v) (void);
v = f;
return v();
}
#endif

198
payloads/libpayload/libcbfs/cbfs_core.c
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@ -2,6 +2,7 @@
* This file is part of the libpayload project.
*
* Copyright (C) 2011 secunet Security Networks AG
* Copyright (C) 2013 Google, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
@ -27,119 +28,153 @@
* SUCH DAMAGE.
*/
/* The CBFS core requires a couple of #defines or functions to adapt it to the target environment:
/* The CBFS core requires a couple of #defines or functions to adapt it to the
* target environment:
*
* CBFS_CORE_WITH_LZMA (must be #define)
* if defined, ulzma() must exist for decompression of data streams
*
* phys_to_virt(x), virt_to_phys(x)
* translate physical addresses to virtual and vice versa
* can be idempotent if no mapping is necessary.
* CBFS_HEADER_ROM_ADDRESS
* ROM address (offset) of CBFS header. Underlying CBFS media may interpret
* it in other way so we call this "address".
*
* ERROR(x...)
* print an error message x (in printf format)
*
* LOG(x...)
* print a message x (in printf format)
*
* DEBUG(x...)
* print a debug message x (in printf format)
*
* romstart()
* returns the start address of the ROM image, or 0xffffffff if ROM is
* top-aligned. This is a physical address.
*
* romend()
* returns the highest address of the ROM image + 1, for use if
* romstart() == 0xffffffff. This is a physical address.
*/
#include <cbfs_core.h>
#include <cbfs.h>
#include <string.h>
/* returns pointer to master header or 0xffffffff if not found */
struct cbfs_header *get_cbfs_header(void)
/* returns a pointer to CBFS master header, or CBFS_HEADER_INVALID_ADDRESS
* on failure */
const struct cbfs_header *cbfs_get_header(struct cbfs_media *media)
{
struct cbfs_header *header;
const struct cbfs_header *header;
struct cbfs_media default_media;
/* find header */
if (romstart() == 0xffffffff) {
header = (struct cbfs_header*)phys_to_virt(*(uint32_t*)phys_to_virt(romend() + CBFS_HEADPTR_ADDR));
} else {
// FIXME: where's the master header on ARM (our current bottom-aligned platform)?
header = NULL;
if (media == CBFS_DEFAULT_MEDIA) {
media = &default_media;
if (init_default_cbfs_media(media) != 0) {
ERROR("Failed to initializee default media.\n");
return NULL;
}
}
media->open(media);
DEBUG("CBFS_HEADER_ROM_ADDRESS: 0x%x/0x%x\n", CBFS_HEADER_ROM_ADDRESS,
CONFIG_ROM_SIZE);
header = media->map(media, CBFS_HEADER_ROM_ADDRESS, sizeof(*header));
media->close(media);
if (header == CBFS_MEDIA_INVALID_MAP_ADDRESS) {
ERROR("Failed to load CBFS header from 0x%x\n",
CBFS_HEADER_ROM_ADDRESS);
return CBFS_HEADER_INVALID_ADDRESS;
}
if (CBFS_HEADER_MAGIC != ntohl(header->magic)) {
ERROR("Could not find valid CBFS master header at %p: %x vs %x.\n", header, CBFS_HEADER_MAGIC, ntohl(header->magic));
ERROR("Could not find valid CBFS master header at %x: "
"%x vs %x.\n", CBFS_HEADER_ROM_ADDRESS, CBFS_HEADER_MAGIC,
ntohl(header->magic));
if (header->magic == 0xffffffff) {
ERROR("Maybe ROM is not mapped properly?\n");
}
return (void*)0xffffffff;
return CBFS_HEADER_INVALID_ADDRESS;
}
return header;
}
// by must be power-of-two
#define CBFS_ALIGN(val, by) (typeof(val))((uint32_t)(val + by - 1) & (uint32_t)~(by - 1))
#define CBFS_ALIGN_UP(val, by) CBFS_ALIGN(val + 1, by)
/* public API starts here*/
struct cbfs_file *cbfs_find(const char *name)
struct cbfs_file *cbfs_get_file(struct cbfs_media *media, const char *name)
{
struct cbfs_header *header = get_cbfs_header();
if (header == (void*)0xffffffff) return NULL;
const char *file_name;
uint32_t offset, align, romsize, name_len;
const struct cbfs_header *header;
struct cbfs_file file, *file_ptr;
struct cbfs_media default_media;
LOG("Searching for %s\n", name);
void *data, *dataend, *origdata;
/* find first entry */
if (romstart() == 0xffffffff) {
data = (void*)phys_to_virt(romend()) - ntohl(header->romsize) + ntohl(header->offset);
dataend = (void*)phys_to_virt(romend());
} else {
data = (void*)phys_to_virt(romstart()) + ntohl(header->offset);
dataend = (void*)phys_to_virt(romstart()) + ntohl(header->romsize);
}
dataend -= ntohl(header->bootblocksize);
int align = ntohl(header->align);
origdata = data;
while ((data < (dataend - 1)) && (data >= origdata)) {
struct cbfs_file *file = data;
if (memcmp(CBFS_FILE_MAGIC, file->magic, strlen(CBFS_FILE_MAGIC)) != 0) {
// no file header found. corruption?
// proceed in aligned steps to resynchronize
LOG("ERROR: No file header found at %p, attempting to recover by searching for header\n", data);
data = phys_to_virt(CBFS_ALIGN_UP(virt_to_phys(data), align));
continue;
}
LOG("Check %s\n", CBFS_NAME(file));
if (strcmp(CBFS_NAME(file), name) == 0) {
return file;
}
void *olddata = data;
data = phys_to_virt(CBFS_ALIGN(virt_to_phys(data) + ntohl(file->len) + ntohl(file->offset), align));
if (olddata > data) {
LOG("Something is wrong here. File chain moved from %p to %p\n", olddata, data);
if (media == CBFS_DEFAULT_MEDIA) {
media = &default_media;
if (init_default_cbfs_media(media) != 0) {
ERROR("Failed to initializee default media.\n");
return NULL;
}
}
if (CBFS_HEADER_INVALID_ADDRESS == (header = cbfs_get_header(media)))
return NULL;
// Logical offset (for source media) of first file.
offset = ntohl(header->offset);
align = ntohl(header->align);
romsize = ntohl(header->romsize);
// TODO header->romsize seems broken now on ARM. Remove this when it's
// fixed.
#if defined(CONFIG_ARCH_ARMV7) && CONFIG_ARCH_ARMV7
romsize = CONFIG_ROM_SIZE;
#endif
DEBUG("offset: 0x%x, align: %d, romsize: %d\n", offset, align, romsize);
LOG("Looking for '%s' starting from 0x%x.\n", name, offset);
media->open(media);
while (offset < romsize &&
media->read(media, &file, offset, sizeof(file)) == sizeof(file)) {
if (memcmp(CBFS_FILE_MAGIC, file.magic,
sizeof(file.magic)) != 0) {
uint32_t new_align = align;
if (offset % align)
new_align += align - (offset % align);
ERROR("ERROR: No file header found at 0x%xx - "
"try next aligned address: 0x%x.\n", offset,
offset + new_align);
offset += new_align;
continue;
}
name_len = ntohl(file.offset) - sizeof(file);
DEBUG(" - load entry 0x%x file name (%d bytes)...\n", offset,
name_len);
// load file name (arbitrary length).
file_name = (const char*)media->map(
media, offset + sizeof(file), name_len);
if (file_name == CBFS_MEDIA_INVALID_MAP_ADDRESS) {
ERROR("ERROR: Failed to get filename: 0x%x.\n", offset);
} else if (strcmp(file_name, name) == 0) {
int file_offset = ntohl(file.offset),
file_len = ntohl(file.len);
LOG("Found file (offset=0x%x, len=%d).\n",
offset + file_offset, file_len);
media->unmap(media, file_name);
file_ptr = media->map(media, offset,
file_offset + file_len);
media->close(media);
return file_ptr;
} else {
LOG(" (unmatched file @0x%x: %s)\n", offset, file_name);
media->unmap(media, file_name);
}
// Move to next file.
offset += ntohl(file.len) + ntohl(file.offset);
if (offset % align)
offset += align - (offset % align);
}
media->close(media);
ERROR("ERROR: Not found.\n");
return NULL;
}
void *cbfs_get_file(const char *name)
void *cbfs_get_file_content(struct cbfs_media *media, const char *name, int type)
{
struct cbfs_file *file = cbfs_find(name);
if (file == NULL) {
ERROR("Could not find file '%s'.\n", name);
return NULL;
}
return (void*)CBFS_SUBHEADER(file);
}
void *cbfs_find_file(const char *name, int type)
{
struct cbfs_file *file = cbfs_find(name);
struct cbfs_file *file = cbfs_get_file(media, name);
if (file == NULL) {
ERROR("Could not find file '%s'.\n", name);
@ -147,7 +182,8 @@ void *cbfs_find_file(const char *name, int type)
}
if (ntohl(file->type) != type) {
ERROR("File '%s' is of type %x, but we requested %x.\n", name, ntohl(file->type), type);
ERROR("File '%s' is of type %x, but we requested %x.\n", name,
ntohl(file->type), type);
return NULL;
}
@ -168,7 +204,9 @@ int cbfs_decompress(int algo, void *src, void *dst, int len)
return -1;
#endif
default:
ERROR("tried to decompress %d bytes with algorithm #%x, but that algorithm id is unsupported.\n", len, algo);
ERROR("tried to decompress %d bytes with algorithm #%x,"
"but that algorithm id is unsupported.\n", len,
algo);
return -1;
}
}

114
payloads/libpayload/libcbfs/ram_media.c Normal file
View File

@ -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;
}