3eb8eb7eba
Start using the rmodtool for generating rmodules. rmodule_link() has been changed to create 2 rules: one for the passed in <name>, the other for creating <name>.rmod which is an ELF file in the format of an rmodule. Since the header is not compiled and linked together with an rmodule there needs to be a way of marking which symbol is the entry point. __rmodule_entry is the symbol used for knowing the entry point. There was a little churn in SMM modules to ensure an rmodule entry point symbol takes a single argument. Change-Id: Ie452ed866f6596bf13f137f5b832faa39f48d26e Signed-off-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: http://review.coreboot.org/5379 Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org> Tested-by: build bot (Jenkins)
91 lines
3 KiB
C
91 lines
3 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 2012 ChromeOS Authors
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef RMODULE_H
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#define RMODULE_H
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#include <stdint.h>
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#include <stddef.h>
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#include <string.h>
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#include <rmodule-defs.h>
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enum {
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RMODULE_TYPE_SMM,
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RMODULE_TYPE_SIPI_VECTOR,
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RMODULE_TYPE_STAGE,
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RMODULE_TYPE_VBOOT,
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};
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struct rmodule;
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/* Public API for loading rmdoules. */
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int rmodule_parse(void *ptr, struct rmodule *m);
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void *rmodule_parameters(const struct rmodule *m);
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void *rmodule_entry(const struct rmodule *m);
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int rmodule_entry_offset(const struct rmodule *m);
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int rmodule_memory_size(const struct rmodule *m);
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int rmodule_load(void *loc, struct rmodule *m);
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int rmodule_load_alignment(const struct rmodule *m);
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/* rmodule_calc_region() calculates the region size, offset to place an
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* rmodule in memory, and load address offset based off of a region allocator
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* with an alignment of region_alignment. This function helps place an rmodule
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* in the same location in ram it will run from. The offset to place the
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* rmodule into the region allocated of size region_size is returned. The
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* load_offset is the address to load and relocate the rmodule.
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* region_alignment must be a power of 2. */
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int rmodule_calc_region(unsigned int region_alignment, size_t rmodule_size,
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size_t *region_size, int *load_offset);
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/* Support for loading rmodule stages. This API is only available when
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* using dynamic cbmem because it uses the dynamic cbmem API to obtain
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* the backing store region for the stage. */
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#if CONFIG_DYNAMIC_CBMEM
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struct cbfs_stage;
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struct cbmem_entry;
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struct rmod_stage_load {
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/* Inputs */
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uint32_t cbmem_id;
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const char *name;
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/* Outputs */
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const struct cbmem_entry *cbmem_entry;
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void *entry;
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};
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/* Both of the following functions return 0 on success, -1 on error. */
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int rmodule_stage_load(struct rmod_stage_load *rsl, struct cbfs_stage *stage);
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int rmodule_stage_load_from_cbfs(struct rmod_stage_load *rsl);
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#endif
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struct rmodule {
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void *location;
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struct rmodule_header *header;
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const void *payload;
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int payload_size;
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void *relocations;
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};
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#if IS_ENABLED(CONFIG_RELOCATABLE_MODULES)
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/* Rmodules have an entry point of named __rmodule_entry. */
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#define RMODULE_ENTRY(entry_) \
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void __rmodule_entry(void *) __attribute__((alias (STRINGIFY(entry_))))
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#else
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#define RMODULE_ENTRY(entry_)
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#endif
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#endif /* RMODULE_H */
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