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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106/* 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 */