/*
* This file is part of the coreboot project.
*
* Copyright (C) 2008, Jordan Crouse <jordan@cosmicpenguin.net>
*
* 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; version 2 of the License.
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
*/
#include <types.h>
#include <string.h>
#include <console/console.h>
#include <cbfs.h>
#include <lib.h>
#include <arch/byteorder.h>
/**
* Decompression wrapper for CBFS
* @param algo
* @param src
* @param dst
* @param len
* @return 0 on success, -1 on failure
*/
static int cbfs_decompress(int algo, void *src, void *dst, int len)
{
switch(algo) {
case CBFS_COMPRESS_NONE:
memcpy(dst, src, len);
return 0;
case CBFS_COMPRESS_LZMA:
if (!ulzma(src, dst)) {
printk(BIOS_ERR, "CBFS: LZMA decompression failed!\n");
return -1;
}
return 0;
default:
printk(BIOS_INFO, "CBFS: Unknown compression type %d\n", algo);
return -1;
}
}
static int cbfs_check_magic(struct cbfs_file *file)
{
return !strcmp(file->magic, CBFS_FILE_MAGIC) ? 1 : 0;
}
static struct cbfs_header *cbfs_master_header(void)
{
struct cbfs_header *header;
void *ptr = (void *)*((unsigned long *) CBFS_HEADPTR_ADDR);
printk(BIOS_SPEW, "Check CBFS header at %p\n", ptr);
header = (struct cbfs_header *) ptr;
printk(BIOS_SPEW, "magic is %08x\n", ntohl(header->magic));
if (ntohl(header->magic) != CBFS_HEADER_MAGIC) {
printk(BIOS_ERR, "ERROR: No valid CBFS header found!\n");
if (header->magic == 0xffffffff) {
printk(BIOS_ERR, "Maybe the ROM isn't entirely mapped yet?\n"
"See (and report to) http://www.coreboot.org/Infrastructure_Projects#CBFS\n");
}
return NULL;
}
printk(BIOS_SPEW, "Found CBFS header at %p\n", ptr);
return header;
}
struct cbfs_file *cbfs_find(const char *name)
{
struct cbfs_header *header = cbfs_master_header();
unsigned long offset;
if (header == NULL)
return NULL;
offset = 0 - ntohl(header->romsize) + ntohl(header->offset);
int align= ntohl(header->align);
while(1) {
struct cbfs_file *file = (struct cbfs_file *) offset;
if (!cbfs_check_magic(file)) return NULL;
printk(BIOS_SPEW, "Check %s\n", CBFS_NAME(file));
if (!strcmp(CBFS_NAME(file), name))
return file;
int flen = ntohl(file->len);
int foffset = ntohl(file->offset);
printk(BIOS_SPEW, "CBFS: follow chain: %p + %x + %x + align -> ", (void *)offset, foffset, flen);
unsigned long oldoffset = offset;
offset = ALIGN(offset + foffset + flen, align);
printk(BIOS_SPEW, "%p\n", (void *)offset);
if (offset <= oldoffset) return NULL;
if (offset < 0xFFFFFFFF - ntohl(header->romsize))
return NULL;
}
}
void *cbfs_find_file(const char *name, int type)
{
struct cbfs_file *file = cbfs_find(name);
if (file == NULL) {
printk(BIOS_INFO, "CBFS: Could not find file %s\n",
name);
return NULL;
}
if (ntohl(file->type) != type) {
printk(BIOS_INFO, "CBFS: File %s is of type %x instead of"
"type %x\n", name, file->type, type);
return NULL;
}
return (void *) CBFS_SUBHEADER(file);
}
static inline int tohex4(unsigned int c)
{
return (c<=9)?(c+'0'):(c-10+'a');
}
static void tohex16(unsigned int val, char* dest)
{
dest[0]=tohex4(val>>12);
dest[1]=tohex4((val>>8) & 0xf);
dest[2]=tohex4((val>>4) & 0xf);
dest[3]=tohex4(val & 0xf);
}
void *cbfs_load_optionrom(u16 vendor, u16 device, void * dest)
{
char name[17]="pciXXXX,XXXX.rom";
struct cbfs_optionrom *orom;
u8 *src;
tohex16(vendor, name+3);
tohex16(device, name+8);
orom = (struct cbfs_optionrom *)
cbfs_find_file(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 = ((unsigned char *) 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 * cbfs_load_stage(const char *name)
{
struct cbfs_stage *stage = (struct cbfs_stage *)
cbfs_find_file(name, CBFS_TYPE_STAGE);
/* this is a mess. There is no ntohll. */
/* for now, assume compatible byte order until we solve this. */
u32 entry;
if (stage == NULL)
return (void *) -1;
printk(BIOS_INFO, "Stage: loading %s @ 0x%x (%d bytes), entry @ 0x%llx\n",
name,
(u32) stage->load, stage->memlen,
stage->entry);
memset((void *) (u32) stage->load, 0, stage->memlen);
if (cbfs_decompress(stage->compression,
((unsigned char *) stage) +
sizeof(struct cbfs_stage),
(void *) (u32) stage->load,
stage->len))
return (void *) -1;
printk(BIOS_DEBUG, "Stage: done loading.\n");
entry = stage->entry;
// entry = ntohl((u32) stage->entry);
return (void *) entry;
}
int cbfs_execute_stage(const char *name)
{
struct cbfs_stage *stage = (struct cbfs_stage *)
cbfs_find_file(name, CBFS_TYPE_STAGE);
if (stage == NULL)
return 1;
if (ntohl(stage->compression) != CBFS_COMPRESS_NONE) {
printk(BIOS_INFO, "CBFS: Unable to run %s: Compressed file"
"Not supported for in-place execution\n", name);
return 1;
}
/* FIXME: This isn't right */
printk(BIOS_INFO, "CBFS: run @ %p\n", (void *) ntohl((u32) stage->entry));
return run_address((void *) ntohl((u32) stage->entry));
}
/**
* 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();
}