/* SPDX-License-Identifier: GPL-2.0 */#ifndef _SELFTESTS_POWERPC_BASIC_ASM_H#define _SELFTESTS_POWERPC_BASIC_ASM_H #include <ppc-asm.h>#include <asm/unistd.h> #ifdef __powerpc64__#define PPC_LL		ld#define PPC_STL		std#define PPC_STLU	stdu#else#define PPC_LL		lwz#define PPC_STL		stw#define PPC_STLU	stwu#endif #define LOAD_REG_IMMEDIATE(reg, expr) \	lis	reg, (expr)@highest;	\	ori	reg, reg, (expr)@higher;	\	rldicr	reg, reg, 32, 31;	\	oris	reg, reg, (expr)@high;	\	ori	reg, reg, (expr)@l; /* * Note: These macros assume that variables being stored on the stack are * sizeof(long), while this is usually the case it may not always be the * case for each use case. */#ifdef  __powerpc64__ // ABIv2#if defined(_CALL_ELF) && _CALL_ELF == 2#define STACK_FRAME_MIN_SIZE 32#define STACK_FRAME_TOC_POS  24#define __STACK_FRAME_PARAM(_param)  (32 + ((_param)*8))#define __STACK_FRAME_LOCAL(_num_params, _var_num)  \	((STACK_FRAME_PARAM(_num_params)) + ((_var_num)*8)) #else // ABIv1 below#define STACK_FRAME_MIN_SIZE 112#define STACK_FRAME_TOC_POS  40#define __STACK_FRAME_PARAM(i)  (48 + ((i)*8)) /* * Caveat: if a function passed more than 8 doublewords, the caller will have * made more space... which would render the 112 incorrect. */#define __STACK_FRAME_LOCAL(_num_params, _var_num)  \	(112 + ((_var_num)*8))  #endif // ABIv2 // Common 64-bit#define STACK_FRAME_LR_POS   16#define STACK_FRAME_CR_POS   8 #else // 32-bit below #define STACK_FRAME_MIN_SIZE 16#define STACK_FRAME_LR_POS   4 #define __STACK_FRAME_PARAM(_param)  (STACK_FRAME_MIN_SIZE + ((_param)*4))#define __STACK_FRAME_LOCAL(_num_params, _var_num)  \	((STACK_FRAME_PARAM(_num_params)) + ((_var_num)*4)) #endif // __powerpc64__ /* Parameter x saved to the stack */#define STACK_FRAME_PARAM(var)    __STACK_FRAME_PARAM(var) /* Local variable x saved to the stack after x parameters */#define STACK_FRAME_LOCAL(num_params, var)    \	__STACK_FRAME_LOCAL(num_params, var) /* * It is very important to note here that _extra is the extra amount of * stack space needed. This space can be accessed using STACK_FRAME_PARAM() * or STACK_FRAME_LOCAL() macros. * * r1 and r2 are not defined in ppc-asm.h (instead they are defined as sp * and toc). Kernel programmers tend to prefer rX even for r1 and r2, hence * %1 and %r2. r0 is defined in ppc-asm.h and therefore %r0 gets * preprocessed incorrectly, hence r0. */#define PUSH_BASIC_STACK(_extra) \	mflr	 r0; \	PPC_STL	 r0, STACK_FRAME_LR_POS(%r1); \	PPC_STLU %r1, -(((_extra + 15) & ~15) + STACK_FRAME_MIN_SIZE)(%r1); #define POP_BASIC_STACK(_extra) \	addi	%r1, %r1, (((_extra + 15) & ~15) + STACK_FRAME_MIN_SIZE); \	PPC_LL	r0, STACK_FRAME_LR_POS(%r1); \	mtlr	r0; .macro OP_REGS op, reg_width, start_reg, end_reg, base_reg, base_reg_offset=0, skip=0	.set i, \start_reg	.rept (\end_reg - \start_reg + 1)	\op	i, (\reg_width * (i - \skip) + \base_reg_offset)(\base_reg)	.set i, i + 1	.endr.endm #endif /* _SELFTESTS_POWERPC_BASIC_ASM_H */