Viewing file:  asm.h (3.86 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Some useful macros for LoongArch assembler code
*
* Copyright (C) 2020-2022 Loongson Technology Corporation Limited
*
* Derived from MIPS:
* Copyright (C) 1995, 1996, 1997, 1999, 2001 by Ralf Baechle
* Copyright (C) 1999 by Silicon Graphics, Inc.
* Copyright (C) 2001 MIPS Technologies, Inc.
* Copyright (C) 2002 Maciej W. Rozycki
*/
#ifndef __ASM_ASM_H
#define __ASM_ASM_H
/* LoongArch pref instruction. */
#ifdef CONFIG_CPU_HAS_PREFETCH
#define PREF(hint, addr, offs) \
preld hint, addr, offs; \
#define PREFX(hint, addr, index) \
preldx hint, addr, index; \
#else /* !CONFIG_CPU_HAS_PREFETCH */
#define PREF(hint, addr, offs)
#define PREFX(hint, addr, index)
#endif /* !CONFIG_CPU_HAS_PREFETCH */
/*
* Stack alignment
*/
#define STACK_ALIGN ~(0xf)
/*
* Macros to handle different pointer/register sizes for 32/64-bit code
*/
/*
* Size of a register
*/
#ifndef __loongarch64
#define SZREG 4
#else
#define SZREG 8
#endif
/*
* Use the following macros in assemblercode to load/store registers,
* pointers etc.
*/
#if (SZREG == 4)
#define REG_L ld.w
#define REG_S st.w
#define REG_ADD add.w
#define REG_SUB sub.w
#else /* SZREG == 8 */
#define REG_L ld.d
#define REG_S st.d
#define REG_ADD add.d
#define REG_SUB sub.d
#endif
/*
* How to add/sub/load/store/shift C int variables.
*/
#if (__SIZEOF_INT__ == 4)
#define INT_ADD add.w
#define INT_ADDI addi.w
#define INT_SUB sub.w
#define INT_L ld.w
#define INT_S st.w
#define INT_SLL slli.w
#define INT_SLLV sll.w
#define INT_SRL srli.w
#define INT_SRLV srl.w
#define INT_SRA srai.w
#define INT_SRAV sra.w
#endif
#if (__SIZEOF_INT__ == 8)
#define INT_ADD add.d
#define INT_ADDI addi.d
#define INT_SUB sub.d
#define INT_L ld.d
#define INT_S st.d
#define INT_SLL slli.d
#define INT_SLLV sll.d
#define INT_SRL srli.d
#define INT_SRLV srl.d
#define INT_SRA srai.d
#define INT_SRAV sra.d
#endif
/*
* How to add/sub/load/store/shift C long variables.
*/
#if (__SIZEOF_LONG__ == 4)
#define LONG_ADD add.w
#define LONG_ADDI addi.w
#define LONG_SUB sub.w
#define LONG_L ld.w
#define LONG_S st.w
#define LONG_SLL slli.w
#define LONG_SLLV sll.w
#define LONG_SRL srli.w
#define LONG_SRLV srl.w
#define LONG_SRA srai.w
#define LONG_SRAV sra.w
#ifdef __ASSEMBLY__
#define LONG .word
#endif
#define LONGSIZE 4
#define LONGMASK 3
#define LONGLOG 2
#endif
#if (__SIZEOF_LONG__ == 8)
#define LONG_ADD add.d
#define LONG_ADDI addi.d
#define LONG_SUB sub.d
#define LONG_L ld.d
#define LONG_S st.d
#define LONG_SLL slli.d
#define LONG_SLLV sll.d
#define LONG_SRL srli.d
#define LONG_SRLV srl.d
#define LONG_SRA srai.d
#define LONG_SRAV sra.d
#ifdef __ASSEMBLY__
#define LONG .dword
#endif
#define LONGSIZE 8
#define LONGMASK 7
#define LONGLOG 3
#endif
/*
* How to add/sub/load/store/shift pointers.
*/
#if (__SIZEOF_POINTER__ == 4)
#define PTR_ADD add.w
#define PTR_ADDI addi.w
#define PTR_SUB sub.w
#define PTR_L ld.w
#define PTR_S st.w
#define PTR_LI li.w
#define PTR_SLL slli.w
#define PTR_SLLV sll.w
#define PTR_SRL srli.w
#define PTR_SRLV srl.w
#define PTR_SRA srai.w
#define PTR_SRAV sra.w
#define PTR_SCALESHIFT 2
#ifdef __ASSEMBLY__
#define PTR .word
#endif
#define PTRSIZE 4
#define PTRLOG 2
#endif
#if (__SIZEOF_POINTER__ == 8)
#define PTR_ADD add.d
#define PTR_ADDI addi.d
#define PTR_SUB sub.d
#define PTR_L ld.d
#define PTR_S st.d
#define PTR_LI li.d
#define PTR_SLL slli.d
#define PTR_SLLV sll.d
#define PTR_SRL srli.d
#define PTR_SRLV srl.d
#define PTR_SRA srai.d
#define PTR_SRAV sra.d
#define PTR_SCALESHIFT 3
#ifdef __ASSEMBLY__
#define PTR .dword
#endif
#define PTRSIZE 8
#define PTRLOG 3
#endif
/* Annotate a function as being unsuitable for kprobes. */
#ifdef CONFIG_KPROBES
#define _ASM_NOKPROBE(name) \
.pushsection "_kprobe_blacklist", "aw"; \
.quad name; \
.popsection
#else
#define _ASM_NOKPROBE(name)
#endif
#endif /* __ASM_ASM_H */
|