965db62429
In DECLARE_REGION and DECLARE_OPTIONAL_REGION, a set of 3 variables will be defined, that is the region 'base', 'end' and 'size'. However, in many codes, the users will only selectively use 'end' or 'size' instead of both of them, which will trigger compiler errors for unused variables. This patch sets __maybe_unused attributes on 'end' and 'size' so that users do not need to use all of them. TEST=intel/archercity CRB Change-Id: Ia5ed183b2dd7a474ce51de47dbc1f9e3f61e5a41 Signed-off-by: Shuo Liu <shuo.liu@intel.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/81209 Reviewed-by: Jérémy Compostella <jeremy.compostella@intel.com> Reviewed-by: Julius Werner <jwerner@chromium.org> Reviewed-by: Martin L Roth <gaumless@gmail.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
94 lines
2.7 KiB
C
94 lines
2.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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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) ((size_t)_##name##_size)
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#define DECLARE_REGION(name) \
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__maybe_unused extern u8 _##name[]; \
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__maybe_unused extern u8 _e##name[]; \
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__maybe_unused extern u8 _##name##_size[];
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/*
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* Regions can be declared optional if not all configurations provide them in
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* memlayout and you want code to be able to check for their existence at
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* runtime. Not every region that is architecture or platform-specific should
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* use this -- only declare regions optional if the code *accessing* them runs
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* both on configurations that have the region and those that don't. That code
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* should then check (REGION_SIZE(name) != 0) before accessing it.
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*/
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#define DECLARE_OPTIONAL_REGION(name) \
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__maybe_unused __weak extern u8 _##name[]; \
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__maybe_unused __weak extern u8 _e##name[]; \
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__maybe_unused __weak extern u8 _##name##_size[];
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DECLARE_REGION(sram)
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DECLARE_OPTIONAL_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_OPTIONAL_REGION(preram_cbfs_cache)
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DECLARE_OPTIONAL_REGION(postram_cbfs_cache)
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DECLARE_OPTIONAL_REGION(cbfs_cache)
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DECLARE_REGION(cbfs_mcache)
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DECLARE_REGION(fmap_cache)
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DECLARE_REGION(tpm_log)
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#if ENV_SEPARATE_ROMSTAGE && CONFIG(ASAN_IN_ROMSTAGE)
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DECLARE_REGION(bss)
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DECLARE_REGION(asan_shadow)
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#endif
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#if ENV_RAMSTAGE && CONFIG(ASAN_IN_RAMSTAGE)
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DECLARE_REGION(data)
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DECLARE_REGION(heap)
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DECLARE_REGION(asan_shadow)
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#endif
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#if ENV_SEPARATE_DATA_AND_BSS
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DECLARE_REGION(data)
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DECLARE_REGION(data_load)
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#endif
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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_OPTIONAL_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_OPTIONAL_REGION(opensbi)
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DECLARE_OPTIONAL_REGION(bl31)
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DECLARE_REGION(transfer_buffer)
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DECLARE_OPTIONAL_REGION(watchdog_tombstone)
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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 !ENV_X86 || ENV_ROMSTAGE_OR_BEFORE;
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}
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#endif /* __SYMBOLS_H */
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