1. 根目录:
2. arch
3. xtensa
4. include
5. asm
6. flat.h

#ifndef __ASM_XTENSA_FLAT_H
#define __ASM_XTENSA_FLAT_H

#define flat_argvp_envp_on_stack()			0
#define flat_old_ram_flag(flags)			(flags)
#define flat_reloc_valid(reloc, size)			((reloc) <= (size))
#define flat_get_addr_from_rp(rp, relval, flags, p)	get_unaligned(rp)
#define flat_put_addr_at_rp(rp, val, relval	)	put_unaligned(val, rp)
#define flat_get_relocate_addr(rel)			(rel)
#define flat_set_persistent(relval, p)			0

#endif /* __ASM_XTENSA_FLAT_H */