244 lines
6.7 KiB
C
244 lines
6.7 KiB
C
/*
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*
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* Copyright (C) 2011 secunet Security Networks AG
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* Copyright (C) 2013 Google, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#define LIBPAYLOAD
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#ifdef LIBPAYLOAD
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# include <libpayload-config.h>
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# if CONFIG(LP_LZMA)
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# include <lzma.h>
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# define CBFS_CORE_WITH_LZMA
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# endif
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# if CONFIG(LP_LZ4)
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# include <lz4.h>
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# define CBFS_CORE_WITH_LZ4
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# endif
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# define CBFS_MINI_BUILD
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#elif defined(__SMM__)
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# define CBFS_MINI_BUILD
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#else
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# define CBFS_CORE_WITH_LZMA
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# define CBFS_CORE_WITH_LZ4
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# include <lib.h>
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#endif
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#include <cbfs.h>
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#include <string.h>
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#ifdef LIBPAYLOAD
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# include <stdio.h>
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# define DEBUG(x...)
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# define LOG(x...)
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# define ERROR(x...) printf(x)
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#else
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# include <console/console.h>
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# define ERROR(x...) printk(BIOS_ERR, "CBFS: " x)
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# define LOG(x...) printk(BIOS_INFO, "CBFS: " x)
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# if CONFIG_LP_DEBUG_CBFS
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# define DEBUG(x...) printk(BIOS_SPEW, "CBFS: " x)
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# else
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# define DEBUG(x...)
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# endif
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#endif
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#include "cbfs_core.c"
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#ifndef __SMM__
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static inline int tohex4(unsigned int c)
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{
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return (c <= 9) ? (c + '0') : (c - 10 + 'a');
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}
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static void tohex16(unsigned int val, char* dest)
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{
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dest[0] = tohex4(val>>12);
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dest[1] = tohex4((val>>8) & 0xf);
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dest[2] = tohex4((val>>4) & 0xf);
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dest[3] = tohex4(val & 0xf);
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}
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void *cbfs_load_optionrom(struct cbfs_media *media, uint16_t vendor,
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uint16_t device)
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{
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char name[17] = "pciXXXX,XXXX.rom";
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tohex16(vendor, name+3);
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tohex16(device, name+8);
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return cbfs_get_file_content(media, name, CBFS_TYPE_OPTIONROM, NULL);
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}
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void * cbfs_load_stage(struct cbfs_media *media, const char *name)
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{
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struct cbfs_stage *stage = (struct cbfs_stage *)
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cbfs_get_file_content(media, name, CBFS_TYPE_STAGE, NULL);
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/* this is a mess. There is no ntohll. */
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/* for now, assume compatible byte order until we solve this. */
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uintptr_t entry;
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uint32_t final_size;
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if (stage == NULL)
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return (void *) -1;
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LOG("loading stage %s @ %p (%d bytes), entry @ 0x%llx\n",
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name,
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(void*)(uintptr_t) stage->load, stage->memlen,
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stage->entry);
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final_size = cbfs_decompress(stage->compression,
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((unsigned char *) stage) +
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sizeof(struct cbfs_stage),
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stage->len,
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(void *) (uintptr_t) stage->load,
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stage->memlen);
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if (!final_size) {
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entry = -1;
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goto out;
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}
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memset((void *)((uintptr_t)stage->load + final_size), 0,
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stage->memlen - final_size);
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DEBUG("stage loaded.\n");
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entry = stage->entry;
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// entry = ntohll(stage->entry);
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out:
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free(stage);
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return (void *) entry;
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}
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int cbfs_execute_stage(struct cbfs_media *media, const char *name)
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{
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struct cbfs_stage *stage = (struct cbfs_stage *)
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cbfs_get_file_content(media, name, CBFS_TYPE_STAGE, NULL);
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if (stage == NULL)
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return 1;
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if (ntohl(stage->compression) != CBFS_COMPRESS_NONE) {
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LOG("Unable to run %s: Compressed file"
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"Not supported for in-place execution\n", name);
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free(stage);
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return 1;
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}
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LOG("run @ %p\n", (void *) (uintptr_t)ntohll(stage->entry));
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int result = run_address((void *)(uintptr_t)ntohll(stage->entry));
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free(stage);
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return result;
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}
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void *cbfs_load_payload(struct cbfs_media *media, const char *name)
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{
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return (struct cbfs_payload *)cbfs_get_file_content(
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media, name, CBFS_TYPE_SELF, NULL);
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}
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struct cbfs_file *cbfs_find(const char *name) {
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struct cbfs_handle *handle = cbfs_get_handle(CBFS_DEFAULT_MEDIA, name);
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struct cbfs_media *m = &handle->media;
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void *ret;
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if (!handle)
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return NULL;
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ret = m->map(m, handle->media_offset,
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handle->content_offset + handle->content_size);
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if (ret == CBFS_MEDIA_INVALID_MAP_ADDRESS) {
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free(handle);
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return NULL;
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}
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free(handle);
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return ret;
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}
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void *cbfs_find_file(const char *name, int type) {
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return cbfs_get_file_content(CBFS_DEFAULT_MEDIA, name, type, NULL);
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}
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const struct cbfs_header *get_cbfs_header(void) {
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return cbfs_get_header(CBFS_DEFAULT_MEDIA);
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}
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/* Simple buffer */
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void *cbfs_simple_buffer_map(struct cbfs_simple_buffer *buffer,
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struct cbfs_media *media,
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size_t offset, size_t count) {
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void *address = buffer->buffer + buffer->allocated;
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DEBUG("simple_buffer_map(offset=%zu, count=%zu): "
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"allocated=%zu, size=%zu, last_allocate=%zu\n",
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offset, count, buffer->allocated, buffer->size,
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buffer->last_allocate);
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if (buffer->allocated + count >= buffer->size)
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return CBFS_MEDIA_INVALID_MAP_ADDRESS;
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if (media->read(media, address, offset, count) != count) {
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ERROR("simple_buffer: fail to read %zd bytes from 0x%zx\n",
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count, offset);
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return CBFS_MEDIA_INVALID_MAP_ADDRESS;
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}
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buffer->allocated += count;
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buffer->last_allocate = count;
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return address;
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}
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void *cbfs_simple_buffer_unmap(struct cbfs_simple_buffer *buffer,
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const void *address) {
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// TODO Add simple buffer management so we can free more than last
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// allocated one.
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DEBUG("simple_buffer_unmap(address=%p): "
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"allocated=%zu, size=%zu, last_allocate=%zu\n",
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address, buffer->allocated, buffer->size,
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buffer->last_allocate);
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if ((buffer->buffer + buffer->allocated - buffer->last_allocate) ==
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address) {
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buffer->allocated -= buffer->last_allocate;
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buffer->last_allocate = 0;
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}
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return NULL;
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}
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/**
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* run_address is passed the address of a function taking no parameters and
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* jumps to it, returning the result.
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* @param f the address to call as a function.
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* @return value returned by the function.
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*/
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int run_address(void *f)
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{
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int (*v) (void);
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v = f;
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return v();
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}
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#endif
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