symbols.h

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#ifndef __SYMBOLS_H
#define __SYMBOLS_H
 
#include <types.h>
 
extern u8 _dram[];
 
#define REGION_SIZE(name) ((size_t)_##name##_size)
 
#define DECLARE_REGION(name)    \
        extern u8 _##name[];    \
        extern u8 _e##name[];   \
        extern u8 _##name##_size[];
 
/*
 * Regions can be declared optional if not all configurations provide them in
 * memlayout and you want code to be able to check for their existence at
 * runtime. Not every region that is architecture or platform-specific should
 * use this -- only declare regions optional if the code *accessing* them runs
 * both on configurations that have the region and those that don't.  That code
 * should then check (REGION_SIZE(name) != 0) before accessing it.
 */
#define DECLARE_OPTIONAL_REGION(name)   \
        __weak extern u8 _##name[];     \
        __weak extern u8 _e##name[];    \
        __weak extern u8 _##name##_size[];
 
DECLARE_REGION(sram)
DECLARE_OPTIONAL_REGION(timestamp)
DECLARE_REGION(preram_cbmem_console)
DECLARE_REGION(cbmem_init_hooks)
DECLARE_REGION(stack)
DECLARE_OPTIONAL_REGION(preram_cbfs_cache)
DECLARE_OPTIONAL_REGION(postram_cbfs_cache)
DECLARE_OPTIONAL_REGION(cbfs_cache)
DECLARE_REGION(cbfs_mcache)
DECLARE_REGION(fmap_cache)
DECLARE_REGION(tpm_tcpa_log)
 
#if ENV_ROMSTAGE && CONFIG(ASAN_IN_ROMSTAGE)
DECLARE_REGION(bss)
DECLARE_REGION(asan_shadow)
#endif
 
#if ENV_RAMSTAGE && CONFIG(ASAN_IN_RAMSTAGE)
DECLARE_REGION(data)
DECLARE_REGION(heap)
DECLARE_REGION(asan_shadow)
#endif
 
/* Regions for execution units. */
 
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_OPTIONAL_REGION(ttb_subtables)
DECLARE_REGION(dma_coherent)
DECLARE_REGION(soc_registers)
DECLARE_REGION(framebuffer)
DECLARE_REGION(pdpt)
DECLARE_OPTIONAL_REGION(opensbi)
DECLARE_OPTIONAL_REGION(bl31)
DECLARE_REGION(transfer_buffer)
DECLARE_OPTIONAL_REGION(watchdog_tombstone)
 
/* 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 !ENV_X86 || ENV_ROMSTAGE_OR_BEFORE;
}
 
#endif /* __SYMBOLS_H */