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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2008, Jordan Crouse <jordan@cosmicpenguin.net>
* Copyright (C) 2013 The Chromium OS Authors. All rights reserved.
*
* 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 <program_loading.h>
#include "cbfs_core.h"
#ifndef __SMM__
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(struct cbfs_media *media, uint16_t vendor,
uint16_t device, void *dest)
{
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, NULL);
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 *cbfs_load_stage_by_offset(struct cbfs_media *media, ssize_t offset)
{
struct cbfs_stage stage;
struct cbfs_media backing_store;
if (init_backing_media(&media, &backing_store))
return (void *)-1;
if (cbfs_read(media, &stage, offset, sizeof(stage)) != sizeof(stage)) {
ERROR("ERROR: failed to read stage header\n");
return (void *)-1;
}
LOG("loading stage @ 0x%llx (%d bytes), entry @ 0x%llx\n",
stage.load, stage.memlen, stage.entry);
/* Stages rely the below clearing so that the bss is initialized. */
memset((void *)(uintptr_t)stage.load, 0, stage.memlen);
if (stage.compression == CBFS_COMPRESS_NONE) {
if (cbfs_read(media, (void *)(uintptr_t)stage.load,
offset + sizeof(stage), stage.len) != stage.len) {
ERROR("ERROR: Reading stage failed.\n");
return (void *)-1;
}
} else {
void *data = media->map(media, offset + sizeof(stage),
stage.len);
if (data == CBFS_MEDIA_INVALID_MAP_ADDRESS) {
ERROR("ERROR: Mapping stage failed.\n");
return (void *)-1;
}
if (!cbfs_decompress(stage.compression, data,
(void *)(uintptr_t)stage.load, stage.len))
return (void *)-1;
media->unmap(media, data);
}
arch_program_segment_loaded(stage.load, stage.memlen);
arch_program_loaded();
DEBUG("stage loaded\n");
return (void *)(uintptr_t)stage.entry;
}
void *cbfs_load_stage(struct cbfs_media *media, const char *name)
{
struct cbfs_file file;
ssize_t offset;
struct cbfs_media backing_store;
if (init_backing_media(&media, &backing_store))
return (void *)-1;
offset = cbfs_locate_file(media, &file, name);
if (offset < 0 || file.type != CBFS_TYPE_STAGE)
return (void *)-1;
return cbfs_load_stage_by_offset(media, offset);
}
/* 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=%zd, count=%zd): "
"allocated=%zd, size=%zd, last_allocate=%zd\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=%zd, size=%zd, last_allocate=%zd\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
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