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/*
* 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 <boot/coreboot_tables.h>
#include <romfs.h>
#ifndef CONFIG_BIG_ENDIAN
#define ntohl(x) ( ((x&0xff)<<24) | ((x&0xff00)<<8) | \
((x&0xff0000) >> 8) | ((x&0xff000000) >> 24) )
#else
#define ntohl(x) (x)
#endif
int run_address(void *f);
int romfs_decompress(int algo, void *src, void *dst, int len)
{
switch(algo) {
case ROMFS_COMPRESS_NONE:
memcpy(dst, src, len);
return 0;
#ifdef CONFIG_COMPRESSION_LZMA
case ROMFS_COMPRESS_LZMA: {
unsigned long ulzma(unsigned char *src, unsigned char *dst);
ulzma(src, dst);
}
return 0;
#endif
#ifdef CONFIG_COMPRESSION_NRV2B
case ROMFS_COMPRESS_NRV2B: {
unsigned long unrv2b(u8 *src, u8 *dst, unsigned long *ilen_p);
unsigned long tmp;
unrv2b(src, dst, &tmp);
}
return 0;
#endif
default:
printk_info( "ROMFS: Unknown compression type %d\n",
algo);
return -1;
}
}
int romfs_check_magic(struct romfs_file *file)
{
return !strcmp(file->magic, ROMFS_FILE_MAGIC) ? 1 : 0;
}
struct romfs_header *romfs_master_header(void)
{
struct romfs_header *header;
void *ptr = (void *)*((unsigned long *) ROMFS_HEADPTR_ADDR);
printk_debug("Check ROMFS header at %p\n", ptr);
header = (struct romfs_header *) ptr;
printk_debug("magic is %08x\n", ntohl(header->magic));
if (ntohl(header->magic) != ROMFS_HEADER_MAGIC) {
printk_err("NO ROMFS HEADER\n");
return NULL;
}
printk_debug("Found ROMFS header at %p\n", ptr);
return header;
}
struct romfs_file *romfs_find(const char *name)
{
struct romfs_header *header = romfs_master_header();
unsigned long offset;
if (header == NULL)
return NULL;
offset = 0 - ntohl(header->romsize) + ntohl(header->offset);
while(1) {
struct romfs_file *file = (struct romfs_file *) offset;
if (romfs_check_magic(file)) printk_info("Check %s\n", ROMFS_NAME(file));
if (romfs_check_magic(file) &&
!strcmp(ROMFS_NAME(file), name))
return file;
offset += ntohl(header->align);
if (offset < 0xFFFFFFFF - ntohl(header->romsize))
return NULL;
}
}
struct romfs_stage *romfs_find_file(const char *name, int type)
{
struct romfs_file *file = romfs_find(name);
if (file == NULL) {
printk_info( "ROMFS: Could not find file %s\n",
name);
return NULL;
}
if (ntohl(file->type) != type) {
printk_info( "ROMFS: File %s is of type %x instead of"
"type %x\n", name, file->type, type);
return NULL;
}
return (void *) ROMFS_SUBHEADER(file);
}
void *romfs_load_optionrom(u16 vendor, u16 device, void * dest)
{
char name[17];
struct romfs_optionrom *orom;
u8 *src;
sprintf(name,"pci%04x,%04x.rom", vendor, device);
orom = (struct romfs_optionrom *)
romfs_find_file(name, ROMFS_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 romtool is (not yet) including a romfs_optionrom header */
src = ((unsigned char *) orom); // + sizeof(struct romfs_optionrom);
if (! dest)
return src;
if (romfs_decompress(ntohl(orom->compression),
src,
dest,
ntohl(orom->len)))
return NULL;
return dest;
}
void * romfs_load_payload(struct lb_memory *lb_mem, const char *name)
{
int selfboot(struct lb_memory *mem, struct romfs_payload *payload);
struct romfs_payload *payload = (struct romfs_payload *)
romfs_find_file(name, ROMFS_TYPE_PAYLOAD);
struct romfs_payload_segment *segment, *first_segment;
if (payload == NULL)
return (void *) -1;
printk_debug("Got a payload\n");
first_segment = segment = &payload->segments;
selfboot(lb_mem, payload);
printk_emerg("SELFBOOT RETURNED!\n");
return (void *) -1;
}
void * romfs_load_stage(const char *name)
{
struct romfs_stage *stage = (struct romfs_stage *)
romfs_find_file(name, ROMFS_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_info("Stage: load @ %d/%d bytes, enter @ %llx\n",
ntohl((u32) stage->load), ntohl(stage->memlen),
stage->entry);
memset((void *) ntohl((u32) stage->load), 0, ntohl(stage->memlen));
if (romfs_decompress(ntohl(stage->compression),
((unsigned char *) stage) +
sizeof(struct romfs_stage),
(void *) ntohl((u32) stage->load),
ntohl(stage->len)))
return (void *) -1;
entry = stage->entry;
// return (void *) ntohl((u32) stage->entry);
return (void *) entry;
}
void * romfs_get_file(const char *name)
{
return romfs_find(name);
}
int romfs_execute_stage(const char *name)
{
struct romfs_stage *stage = (struct romfs_stage *)
romfs_find_file(name, ROMFS_TYPE_STAGE);
if (stage == NULL)
return 1;
if (ntohl(stage->compression) != ROMFS_COMPRESS_NONE) {
printk_info( "ROMFS: Unable to run %s: Compressed file"
"Not supported for in-place execution\n", name);
return 1;
}
/* FIXME: This isn't right */
printk_info( "ROMFS: 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.
* returns value returned by the function.
*/
int run_address(void *f)
{
int (*v) (void);
v = f;
return v();
}