Commit bd4d3042 authored by Michael Ellerman's avatar Michael Ellerman
Browse files

selftests/powerpc: Add 32-bit support to asm helpers 



Add support for 32-bit builds to the asm helpers.

Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220627140239.2464900-6-mpe@ellerman.id.au
parent cfbc0723

tools/testing/selftests/powerpc/include/basic_asm.h

+38 −9
Original line number Diff line number Diff line
@@ -5,6 +5,16 @@ 
#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;	\
@@ -14,16 +24,20 @@ 


/*

 * 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

 * 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



#else // ABIv1 below

#define STACK_FRAME_MIN_SIZE 112

#define STACK_FRAME_TOC_POS  40

#define __STACK_FRAME_PARAM(i)  (48 + ((i)*8))
@@ -34,7 +48,24 @@ 
 */

#define __STACK_FRAME_LOCAL(_num_params, _var_num)  \

	(112 + ((_var_num)*8))

#endif





#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)
@@ -42,8 +73,6 @@ 
/* 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
@@ -57,12 +86,12 @@ 
 */

#define PUSH_BASIC_STACK(_extra) \

	mflr	 r0; \

	std	r0, STACK_FRAME_LR_POS(%r1); \

	stdu	%r1, -(((_extra + 15) & ~15) + STACK_FRAME_MIN_SIZE)(%r1);

	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); \

	ld	r0, STACK_FRAME_LR_POS(%r1); \

	PPC_LL	r0, STACK_FRAME_LR_POS(%r1); \

	mtlr	r0;



#endif /* _SELFTESTS_POWERPC_BASIC_ASM_H */