Commit bd4d3042 authored by Michael Ellerman's avatar Michael Ellerman

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
......@@ -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
......@@ -56,13 +85,13 @@
* preprocessed incorrectly, hence r0.
*/
#define PUSH_BASIC_STACK(_extra) \
mflr r0; \
std r0, STACK_FRAME_LR_POS(%r1); \
stdu %r1, -(((_extra + 15) & ~15) + STACK_FRAME_MIN_SIZE)(%r1);
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); \
ld r0, STACK_FRAME_LR_POS(%r1); \
PPC_LL r0, STACK_FRAME_LR_POS(%r1); \
mtlr r0;
#endif /* _SELFTESTS_POWERPC_BASIC_ASM_H */
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