/* 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 */