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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_POWERPC_STATIC_CALL_H
#define _ASM_POWERPC_STATIC_CALL_H
#define __PPC_SCT(name, inst) \
asm(".pushsection .text, \"ax\" \n" \
".align 5 \n" \
".globl " STATIC_CALL_TRAMP_STR(name) " \n" \
STATIC_CALL_TRAMP_STR(name) ": \n" \
inst " \n" \
" lis 12,2f@ha \n" \
" lwz 12,2f@l(12) \n" \
" mtctr 12 \n" \
" bctr \n" \
"1: li 3, 0 \n" \
" blr \n" \
"2: .long 0 \n" \
".type " STATIC_CALL_TRAMP_STR(name) ", @function \n" \
".size " STATIC_CALL_TRAMP_STR(name) ", . - " STATIC_CALL_TRAMP_STR(name) " \n" \
".popsection \n")
#define PPC_SCT_RET0 20 /* Offset of label 1 */
#define PPC_SCT_DATA 28 /* Offset of label 2 */
#define ARCH_DEFINE_STATIC_CALL_TRAMP(name, func) __PPC_SCT(name, "b " #func)
#define ARCH_DEFINE_STATIC_CALL_NULL_TRAMP(name) __PPC_SCT(name, "blr")
#define ARCH_DEFINE_STATIC_CALL_RET0_TRAMP(name) __PPC_SCT(name, "b .+20")
#endif /* _ASM_POWERPC_STATIC_CALL_H */
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