| /* |
| * 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. |
| */ |
| #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 SEG_FINAL flag will be |
| * set on the last segment loaded. */ |
| void arch_segment_loaded(uintptr_t start, size_t size, int flags); |
| |
| struct buffer_area { |
| void *data; |
| size_t size; |
| }; |
| |
| enum prog_type { |
| PROG_VERSTAGE, |
| PROG_ROMSTAGE, |
| PROG_RAMSTAGE, |
| PROG_PAYLOAD, |
| }; |
| |
| /* Representation of a program. */ |
| struct prog { |
| enum prog_type type; |
| const char *name; |
| /* The area can mean different things depending on what type the |
| * program is. e.g. a payload prog uses this field for the backing |
| * store of the payload_segments and data. After loading the segments |
| * area is updated to reflect the bounce buffer used. */ |
| struct buffer_area area; |
| /* Entry to program with optional argument. It's up to the architecture |
| * to decide if argument is passed. */ |
| void (*entry)(void *); |
| void *arg; |
| }; |
| |
| static inline size_t prog_size(const struct prog *prog) |
| { |
| return prog->area.size; |
| } |
| |
| static inline void *prog_start(const struct prog *prog) |
| { |
| return prog->area.data; |
| } |
| |
| static inline void *prog_entry(const struct prog *prog) |
| { |
| return prog->entry; |
| } |
| |
| static inline void *prog_entry_arg(const struct prog *prog) |
| { |
| return prog->arg; |
| } |
| |
| static inline void prog_set_area(struct prog *prog, void *start, size_t size) |
| { |
| prog->area.data = start; |
| prog->area.size = size; |
| } |
| |
| static inline void prog_set_entry(struct prog *prog, void *e, void *arg) |
| { |
| prog->entry = e; |
| prog->arg = arg; |
| } |
| |
| /* Run the program described by prog. */ |
| void prog_run(struct prog *prog); |
| /* Per architecture implementation running a program. */ |
| void arch_prog_run(struct prog *prog); |
| /* Platform (SoC/chipset) specific overrides for running a program. This is |
| * called prior to calling the arch_prog_run. Thus, if there is anything |
| * special that needs to be done by the platform similar to the architecture |
| * code it needs to that as well. */ |
| void platform_prog_run(struct prog *prog); |
| |
| struct prog_loader_ops { |
| const char *name; |
| /* Determine if the loader is the active one. If so returns 1 else 0 |
| * or < 0 on error. */ |
| int (*is_loader_active)(struct prog *prog); |
| /* Returns < 0 on error or 0 on success. This function needs to do |
| * different things depending on the prog type. See definition |
| * of struct prog above. */ |
| int (*prepare)(struct prog *prog); |
| }; |
| |
| /************************ |
| * ROMSTAGE LOADING * |
| ************************/ |
| |
| /* Run romstage from bootblock. */ |
| void run_romstage(void); |
| |
| /************************ |
| * RAMSTAGE LOADING * |
| ************************/ |
| |
| /* Run ramstage from romstage. */ |
| void run_ramstage(void); |
| |
| /* Called when the stage cache couldn't load ramstage on resume. */ |
| void ramstage_cache_invalid(void); |
| |
| /*********************** |
| * PAYLOAD LOADING * |
| ***********************/ |
| |
| /* 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 prog *payload); |
| |
| /* Defined in src/lib/selfboot.c */ |
| void *selfload(struct prog *payload); |
| |
| #endif /* PROGRAM_LOADING_H */ |