#ifndef _SELFTESTS_POWERPC_BASIC_ASM_H#define _SELFTESTS_POWERPC_BASIC_ASM_H #include <ppc-asm.h>#include <asm/unistd.h> #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 * doublewords, while this is usually the case it may not always be the * case for each use case. */#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#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 /* 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)#define STACK_FRAME_LR_POS   16#define STACK_FRAME_CR_POS   8 /* * 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; \	std	r0,STACK_FRAME_LR_POS(%r1); \	stdu	%r1,-(_extra + STACK_FRAME_MIN_SIZE)(%r1); \	mfcr	r0; \	stw	r0,STACK_FRAME_CR_POS(%r1); \	std	%r2,STACK_FRAME_TOC_POS(%r1); #define POP_BASIC_STACK(_extra) \	ld	%r2,STACK_FRAME_TOC_POS(%r1); \	lwz	r0,STACK_FRAME_CR_POS(%r1); \	mtcr	r0; \	addi	%r1,%r1,(_extra + STACK_FRAME_MIN_SIZE); \	ld	r0,STACK_FRAME_LR_POS(%r1); \	mtlr	r0; #endif /* _SELFTESTS_POWERPC_BASIC_ASM_H */