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/*
* This file is part of the coreboot project.
*
* Copyright 2015 Google Inc.
* Copyright (C) 2014 Imagination Technologies
*
* 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 PROGRAM_LOADING_H
#define PROGRAM_LOADING_H
#include <stdint.h>
#include <stddef.h>
enum {
/* Last segment of program. Can be used to take different actions for
* cache maintenance of a program load. */
SEG_FINAL = 1 << 0,
};
/* Called for each segment of a program loaded. The PROG_FLAG_FINAL will be
* set on the last segment loaded. */
void arch_segment_loaded(uintptr_t start, size_t size, int flags);
/************************
* ROMSTAGE LOADING *
************************/
/* Run romstage from bootblock. */
void run_romstage(void);
/************************
* RAMSTAGE LOADING *
************************/
struct romstage_handoff;
struct cbmem_entry;
#if defined(__PRE_RAM__)
#if CONFIG_RELOCATABLE_RAMSTAGE
/* The cache_loaded_ramstage() and load_cached_ramstage() functions are defined
* to be weak so that board and chipset code may override them. Their job is to
* cache and load the ramstage for quick S3 resume. By default a copy of the
* relocated ramstage is saved using the cbmem infrastructure. These
* functions are only valid during romstage. */
/* The implementer of cache_loaded_ramstage() may use the romstage_handoff
* structure to store information, but note that the handoff variable can be
* NULL. The ramstage cbmem_entry represents the region occupied by the loaded
* ramstage. */
void cache_loaded_ramstage(struct romstage_handoff *handoff,
const struct cbmem_entry *ramstage, void *entry_point);
/* Return NULL on error or entry point on success. The ramstage cbmem_entry is
* the region where to load the cached contents to. */
void * load_cached_ramstage(struct romstage_handoff *handoff,
const struct cbmem_entry *ramstage);
#else /* CONFIG_RELOCATABLE_RAMSTAGE */
static inline void cache_loaded_ramstage(struct romstage_handoff *handoff,
const struct cbmem_entry *ramstage, void *entry_point)
{
}
static inline void *
load_cached_ramstage(struct romstage_handoff *handoff,
const struct cbmem_entry *ramstage)
{
return NULL;
}
#endif /* CONFIG_RELOCATABLE_RAMSTAGE */
#endif /* defined(__PRE_RAM__) */
/* Run ramstage from romstage. */
void run_ramstage(void);
struct ramstage_loader_ops {
const char *name;
void *(*load)(uint32_t cbmem_id, const char *name,
const struct cbmem_entry **cbmem_entry);
};
/***********************
* PAYLOAD LOADING *
***********************/
struct buffer_area {
void *data;
size_t size;
};
struct payload {
const char *name;
struct buffer_area backing_store;
/* Used when payload wants memory coreboot ramstage is running at. */
struct buffer_area bounce;
void *entry;
};
/* Load payload into memory in preparation to run. */
void payload_load(void);
/* Run the loaded payload. */
void payload_run(void);
/* Mirror the payload to be loaded. */
void mirror_payload(struct payload *payload);
/* architecture specific function to run payload. */
void arch_payload_run(const struct payload *payload);
/* Payload loading operations. */
struct payload_loader_ops {
const char *name;
/*
* Fill in payload_backing_store structure. Return 0 on success, < 0
* on failure.
*/
int (*locate)(struct payload *payload);
};
/* Defined in src/lib/selfboot.c */
void *selfload(struct payload *payload);
#endif /* PROGRAM_LOADING_H */
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