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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2012 ChromeOS Authors
*
* 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
*/
#ifndef RMODULE_H
#define RMODULE_H
#include <stdint.h>
#include <stddef.h>
#include <rmodule-defs.h>
enum {
RMODULE_TYPE_SMM,
RMODULE_TYPE_SIPI_VECTOR,
RMODULE_TYPE_STAGE,
RMODULE_TYPE_VBOOT,
};
struct rmodule;
/* Public API for loading rmdoules. */
int rmodule_parse(void *ptr, struct rmodule *m);
void *rmodule_parameters(const struct rmodule *m);
void *rmodule_entry(const struct rmodule *m);
int rmodule_entry_offset(const struct rmodule *m);
int rmodule_memory_size(const struct rmodule *m);
int rmodule_load(void *loc, struct rmodule *m);
int rmodule_load_alignment(const struct rmodule *m);
/* rmodule_calc_region() calculates the region size, offset to place an
* rmodule in memory, and load address offset based off of a region allocator
* with an alignment of region_alignment. This function helps place an rmodule
* in the same location in ram it will run from. The offset to place the
* rmodule into the region allocated of size region_size is returned. The
* load_offset is the address to load and relocate the rmodule.
* region_alignment must be a power of 2. */
int rmodule_calc_region(unsigned int region_alignment, size_t rmodule_size,
size_t *region_size, int *load_offset);
#define DEFINE_RMODULE_HEADER(name_, entry_, type_) \
struct rmodule_header name_ \
__attribute__ ((section (".module_header"))) = \
RMODULE_HEADER(entry_, type_)
/* Support for loading rmodule stages. This API is only available when
* using dynamic cbmem because it uses the dynamic cbmem API to obtain
* the backing store region for the stage. */
#if CONFIG_DYNAMIC_CBMEM
struct cbfs_stage;
struct cbmem_entry;
struct rmod_stage_load {
/* Inputs */
uint32_t cbmem_id;
const char *name;
/* Outputs */
const struct cbmem_entry *cbmem_entry;
void *entry;
};
/* Both of the following functions return 0 on success, -1 on error. */
int rmodule_stage_load(struct rmod_stage_load *rsl, struct cbfs_stage *stage);
int rmodule_stage_load_from_cbfs(struct rmod_stage_load *rsl);
#endif
struct rmodule {
void *location;
struct rmodule_header *header;
const void *payload;
int payload_size;
void *relocations;
};
/* These are the symbols assumed that every module contains. The linker script
* provides these symbols. */
extern char _relocations_begin_offset[];
extern char _relocations_end_offset[];
extern char _payload_end_offset[];
extern char _payload_begin_offset[];
extern char _bss[];
extern char _ebss[];
extern char _module_program_size[];
extern char _module_link_start_addr[];
extern char _module_params_begin[];
extern char _module_params_end[];
#endif /* RMODULE_H */
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