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/*
* This file is part of the coreboot project.
*
* Copyright 2014 Google Inc.
*
* 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.
*/
#ifndef __SYMBOLS_H
#define __SYMBOLS_H
#include <types.h>
extern u8 _dram[];
#define REGION_SIZE(name) (_e##name - _##name)
#define DECLARE_REGION(name) \
extern u8 _##name[]; \
extern u8 _e##name[];
DECLARE_REGION(sram)
DECLARE_REGION(timestamp)
DECLARE_REGION(preram_cbmem_console)
DECLARE_REGION(cbmem_init_hooks)
DECLARE_REGION(stack)
DECLARE_REGION(preram_cbfs_cache)
DECLARE_REGION(postram_cbfs_cache)
DECLARE_REGION(cbfs_cache)
DECLARE_REGION(fmap_cache)
DECLARE_REGION(payload)
/* "program" always refers to the current execution unit. */
DECLARE_REGION(program)
/* _<stage>_size is always the maximum amount allocated in memlayout, whereas
_program_size gives the actual memory footprint *used* by current stage. */
DECLARE_REGION(decompressor)
DECLARE_REGION(bootblock)
DECLARE_REGION(verstage)
DECLARE_REGION(romstage)
DECLARE_REGION(postcar)
DECLARE_REGION(ramstage)
/* Arch-specific, move to <arch/symbols.h> if they become too many. */
DECLARE_REGION(pagetables)
DECLARE_REGION(ttb)
DECLARE_REGION(ttb_subtables)
DECLARE_REGION(dma_coherent)
DECLARE_REGION(soc_registers)
DECLARE_REGION(framebuffer)
DECLARE_REGION(pdpt)
DECLARE_REGION(opensbi)
DECLARE_REGION(bl31)
/*
* Put this into a .c file accessing a linker script region to mark that region
* as "optional". If it is defined in memlayout.ld (or anywhere else), the
* values from that definition will be used. If not, start, end and size will
* all evaluate to 0. (We can't explicitly assign the symbols to 0 in the
* assembly due to https://sourceware.org/bugzilla/show_bug.cgi?id=1038.)
*/
#define DECLARE_OPTIONAL_REGION(name) asm (".weak _" #name ", _e" #name)
/* Returns true when pre-RAM symbols are known to the linker.
* (Does not necessarily mean that the memory is accessible.) */
static inline int preram_symbols_available(void)
{
return !CONFIG(ARCH_X86) || ENV_ROMSTAGE_OR_BEFORE;
}
#endif /* __SYMBOLS_H */
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