asm.h

  1/* SPDX-License-Identifier: GPL-2.0 */
  2/*
  3 * Some useful macros for LoongArch assembler code
  4 *
  5 * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
  6 *
  7 * Derived from MIPS:
  8 * Copyright (C) 1995, 1996, 1997, 1999, 2001 by Ralf Baechle
  9 * Copyright (C) 1999 by Silicon Graphics, Inc.
 10 * Copyright (C) 2001 MIPS Technologies, Inc.
 11 * Copyright (C) 2002  Maciej W. Rozycki
 12 */
 13#ifndef __ASM_ASM_H
 14#define __ASM_ASM_H
 15
 16/* LoongArch pref instruction. */
 17#ifdef CONFIG_CPU_HAS_PREFETCH
 18
 19#define PREF(hint, addr, offs)				\
 20		preld	hint, addr, offs;		\
 21
 22#define PREFX(hint, addr, index)			\
 23		preldx	hint, addr, index;		\
 24
 25#else /* !CONFIG_CPU_HAS_PREFETCH */
 26
 27#define PREF(hint, addr, offs)
 28#define PREFX(hint, addr, index)
 29
 30#endif /* !CONFIG_CPU_HAS_PREFETCH */
 31
 32/*
 33 * Stack alignment
 34 */
 35#define STACK_ALIGN	~(0xf)
 36
 37/*
 38 * Macros to handle different pointer/register sizes for 32/64-bit code
 39 */
 40
 41/*
 42 * Size of a register
 43 */
 44#ifndef __loongarch64
 45#define SZREG	4
 46#else
 47#define SZREG	8
 48#endif
 49
 50/*
 51 * Use the following macros in assemblercode to load/store registers,
 52 * pointers etc.
 53 */
 54#if (SZREG == 4)
 55#define REG_L		ld.w
 56#define REG_S		st.w
 57#define REG_ADD		add.w
 58#define REG_SUB		sub.w
 59#else /* SZREG == 8 */
 60#define REG_L		ld.d
 61#define REG_S		st.d
 62#define REG_ADD		add.d
 63#define REG_SUB		sub.d
 64#endif
 65
 66/*
 67 * How to add/sub/load/store/shift C int variables.
 68 */
 69#if (__SIZEOF_INT__ == 4)
 70#define INT_ADD		add.w
 71#define INT_ADDI	addi.w
 72#define INT_SUB		sub.w
 73#define INT_L		ld.w
 74#define INT_S		st.w
 75#define INT_SLLI	slli.w
 76#define INT_SLLV	sll.w
 77#define INT_SRLI	srli.w
 78#define INT_SRLV	srl.w
 79#define INT_SRAI	srai.w
 80#define INT_SRAV	sra.w
 81#endif
 82
 83#if (__SIZEOF_INT__ == 8)
 84#define INT_ADD		add.d
 85#define INT_ADDI	addi.d
 86#define INT_SUB		sub.d
 87#define INT_L		ld.d
 88#define INT_S		st.d
 89#define INT_SLLI	slli.d
 90#define INT_SLLV	sll.d
 91#define INT_SRLI	srli.d
 92#define INT_SRLV	srl.d
 93#define INT_SRAI	srai.d
 94#define INT_SRAV	sra.d
 95#endif
 96
 97/*
 98 * How to add/sub/load/store/shift C long variables.
 99 */
100#if (__SIZEOF_LONG__ == 4)
101#define LONG_ADD	add.w
102#define LONG_ADDI	addi.w
103#define LONG_ALSL	alsl.w
104#define LONG_BSTRINS	bstrins.w
105#define LONG_BSTRPICK	bstrpick.w
106#define LONG_SUB	sub.w
107#define LONG_L		ld.w
108#define LONG_LI		li.w
109#define LONG_LPTR	ld.w
110#define LONG_S		st.w
111#define LONG_SPTR	st.w
112#define LONG_SLLI	slli.w
113#define LONG_SLLV	sll.w
114#define LONG_SRLI	srli.w
115#define LONG_SRLV	srl.w
116#define LONG_SRAI	srai.w
117#define LONG_SRAV	sra.w
118#define LONG_ROTR	rotr.w
119#define LONG_ROTRI	rotri.w
120
121#ifdef __ASSEMBLER__
122#define LONG		.word
123#endif
124#define LONGSIZE	4
125#define LONGMASK	3
126#define LONGLOG		2
127#endif
128
129#if (__SIZEOF_LONG__ == 8)
130#define LONG_ADD	add.d
131#define LONG_ADDI	addi.d
132#define LONG_ALSL	alsl.d
133#define LONG_BSTRINS	bstrins.d
134#define LONG_BSTRPICK	bstrpick.d
135#define LONG_SUB	sub.d
136#define LONG_L		ld.d
137#define LONG_LI		li.d
138#define LONG_LPTR	ldptr.d
139#define LONG_S		st.d
140#define LONG_SPTR	stptr.d
141#define LONG_SLLI	slli.d
142#define LONG_SLLV	sll.d
143#define LONG_SRLI	srli.d
144#define LONG_SRLV	srl.d
145#define LONG_SRAI	srai.d
146#define LONG_SRAV	sra.d
147#define LONG_ROTR	rotr.d
148#define LONG_ROTRI	rotri.d
149
150#ifdef __ASSEMBLER__
151#define LONG		.dword
152#endif
153#define LONGSIZE	8
154#define LONGMASK	7
155#define LONGLOG		3
156#endif
157
158/*
159 * How to add/sub/load/store/shift pointers.
160 */
161#if (__SIZEOF_POINTER__ == 4)
162#define PTR_ADD		add.w
163#define PTR_ADDI	addi.w
164#define PTR_ALSL	alsl.w
165#define PTR_BSTRINS	bstrins.w
166#define PTR_BSTRPICK	bstrpick.w
167#define PTR_SUB		sub.w
168#define PTR_L		ld.w
169#define PTR_LI		li.w
170#define PTR_LPTR	ld.w
171#define PTR_S		st.w
172#define PTR_SPTR	st.w
173#define PTR_SLLI	slli.w
174#define PTR_SLLV	sll.w
175#define PTR_SRLI	srli.w
176#define PTR_SRLV	srl.w
177#define PTR_SRAI	srai.w
178#define PTR_SRAV	sra.w
179#define PTR_ROTR	rotr.w
180#define PTR_ROTRI	rotri.w
181
182#define PTR_SCALESHIFT	2
183
184#ifdef __ASSEMBLER__
185#define PTR		.word
186#endif
187#define PTRSIZE		4
188#define PTRLOG		2
189#endif
190
191#if (__SIZEOF_POINTER__ == 8)
192#define PTR_ADD		add.d
193#define PTR_ADDI	addi.d
194#define PTR_ALSL	alsl.d
195#define PTR_BSTRINS	bstrins.d
196#define PTR_BSTRPICK	bstrpick.d
197#define PTR_SUB		sub.d
198#define PTR_L		ld.d
199#define PTR_LI		li.d
200#define PTR_LPTR	ldptr.d
201#define PTR_S		st.d
202#define PTR_SPTR	stptr.d
203#define PTR_SLLI	slli.d
204#define PTR_SLLV	sll.d
205#define PTR_SRLI	srli.d
206#define PTR_SRLV	srl.d
207#define PTR_SRAI	srai.d
208#define PTR_SRAV	sra.d
209#define PTR_ROTR	rotr.d
210#define PTR_ROTRI	rotri.d
211
212#define PTR_SCALESHIFT	3
213
214#ifdef __ASSEMBLER__
215#define PTR		.dword
216#endif
217#define PTRSIZE		8
218#define PTRLOG		3
219#endif
220
221/* Annotate a function as being unsuitable for kprobes. */
222#ifdef CONFIG_KPROBES
223#ifdef CONFIG_32BIT
224#define _ASM_NOKPROBE(name)				\
225	.pushsection "_kprobe_blacklist", "aw";		\
226	.long	name;					\
227	.popsection
228#else
229#define _ASM_NOKPROBE(name)				\
230	.pushsection "_kprobe_blacklist", "aw";		\
231	.quad	name;					\
232	.popsection
233#endif
234#else
235#define _ASM_NOKPROBE(name)
236#endif
237
238#endif /* __ASM_ASM_H */