71 lines
2.0 KiB
C
71 lines
2.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/* This file is part of the coreboot project. */
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#ifndef __SYMBOLS_H
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#define __SYMBOLS_H
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#include <types.h>
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extern u8 _dram[];
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#define REGION_SIZE(name) (_e##name - _##name)
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#define DECLARE_REGION(name) \
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extern u8 _##name[]; \
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extern u8 _e##name[];
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DECLARE_REGION(sram)
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DECLARE_REGION(timestamp)
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DECLARE_REGION(preram_cbmem_console)
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DECLARE_REGION(cbmem_init_hooks)
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DECLARE_REGION(stack)
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DECLARE_REGION(preram_cbfs_cache)
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DECLARE_REGION(postram_cbfs_cache)
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DECLARE_REGION(cbfs_cache)
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DECLARE_REGION(fmap_cache)
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DECLARE_REGION(tpm_tcpa_log)
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/* Regions for execution units. */
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DECLARE_REGION(payload)
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/* "program" always refers to the current execution unit. */
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DECLARE_REGION(program)
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/* _<stage>_size is always the maximum amount allocated in memlayout, whereas
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_program_size gives the actual memory footprint *used* by current stage. */
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DECLARE_REGION(decompressor)
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DECLARE_REGION(bootblock)
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DECLARE_REGION(verstage)
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DECLARE_REGION(romstage)
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DECLARE_REGION(postcar)
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DECLARE_REGION(ramstage)
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/* Arch-specific, move to <arch/symbols.h> if they become too many. */
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DECLARE_REGION(pagetables)
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DECLARE_REGION(ttb)
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DECLARE_REGION(ttb_subtables)
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DECLARE_REGION(dma_coherent)
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DECLARE_REGION(soc_registers)
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DECLARE_REGION(framebuffer)
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DECLARE_REGION(pdpt)
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DECLARE_REGION(opensbi)
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DECLARE_REGION(bl31)
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/*
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* Put this into a .c file accessing a linker script region to mark that region
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* as "optional". If it is defined in memlayout.ld (or anywhere else), the
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* values from that definition will be used. If not, start, end and size will
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* all evaluate to 0. (We can't explicitly assign the symbols to 0 in the
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* assembly due to https://sourceware.org/bugzilla/show_bug.cgi?id=1038.)
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*/
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#define DECLARE_OPTIONAL_REGION(name) asm (".weak _" #name ", _e" #name)
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/* Returns true when pre-RAM symbols are known to the linker.
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* (Does not necessarily mean that the memory is accessible.) */
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static inline int preram_symbols_available(void)
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{
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return !CONFIG(ARCH_X86) || ENV_ROMSTAGE_OR_BEFORE;
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}
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#endif /* __SYMBOLS_H */
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