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/*
 * include/asm-mips/asm.h
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 1995 by Ralf Baechle
 *
 * Some useful macros for MIPS assembler code
 *
 * Some of the routines below contain useless nops that will be optimized
 * away by gas in -O mode. These nops are however required to fill delay
 * slots in noreorder mode.
 */
#ifndef __ASM_ASM_H
#define __ASM_ASM_H
 
#include <linux/config.h>
#include <asm/regdef.h>
#include <asm/fpregdef.h>
 
#ifndef CAT
#ifdef __STDC__
#define __CAT(str1,str2) str1##str2
#else
#define __CAT(str1,str2) str1/**/str2
#endif
#define CAT(str1,str2) __CAT(str1,str2)
#endif
 
/*
 * Macros to handle different pointer sizes for 32/64-bit code
 */
#if __mips == 3
#define PTR     .quad
#define PTRSIZE 8
#define PTRLOG  3
#define lp      ld
#else
#define PTR     .word
#define PTRSIZE 4
#define PTRLOG  2
#define lp      lw
#endif
 
/*
 * ELF specific declarations
 */
#ifdef __ELF__
#define TYPE(symbol,_type)                              \
                        .type   symbol,@_type
#define SIZE(symbol,_size)                              \
                        .size   symbol,_size
#else
#define TYPE(symbol,type)
#define SIZE(symbol,size)
#endif
 
/*
 * PIC specific declarations
 * Not used for the kernel but here seems to be the right place.
 */
#ifdef __PIC__
#define CPRESTORE(register)                             \
                        .cprestore register
#define CPADD(register)                                 \
                        .cpadd  register
#define CPLOAD(register)                                \
                        .cpload register
#else
#define CPRESTORE(register)
#define CPADD(register)
#define CPLOAD(register)
#endif
 
/*
 * LEAF - declare leaf routine
 */
#define LEAF(symbol)                                    \
                        .globl  symbol;                 \
                        .align  2;                      \
                        TYPE(symbol,function);          \
                        .ent    symbol,0;               \
symbol:                 .frame  sp,0,ra
 
/*
 * NESTED - declare nested routine entry point
 */
#define NESTED(symbol, framesize, rpc)                  \
                        .globl  symbol;                 \
                        .align  2;                      \
                        TYPE(symbol,function);          \
                        .ent    symbol,0;               \
symbol:                 .frame  sp, framesize, rpc
 
/*
 * END - mark end of function
 */
#define END(function)                                   \
                        .end    function;               \
                        SIZE(function,.-function)
 
/*
 * EXPORT - export definition of symbol
 */
#define EXPORT(symbol)                                  \
                        .globl  symbol;                 \
symbol:
 
/*
 * ABS - export absolute symbol
 */
#define ABS(symbol,value)                               \
                        .globl  symbol;                 \
symbol                  =       value
 
#define PANIC(msg)                                      \
                        la      a0,8f;                  \
                        jal     panic;                  \
                        nop;                            \
9:                      b       9b;                     \
                        nop;                            \
                        TEXT(msg)
 
/*
 * Print formated string
 */
#define PRINT(string)                                   \
                        la      a0,8f;                  \
                        jal     printk;                 \
                        nop;                            \
                        TEXT(string)
 
#define TEXT(msg)                                       \
                        .data;                          \
8:                      .asciiz msg;                    \
                        .text
 
/*
 * Build text tables
 */
#define TTABLE(string)                                  \
                .text;                                  \
                .word   1f;                             \
                .data;                                  \
1:              .asciz  string;                         \
                .text;
 
/*
 * Move to kernel mode and disable interrupts
 * Set cp0 enable bit as sign that we're running on the kernel stack
 * Use with .set noat!
 * Note that the mtc0 will be effective on R4000 pipeline stage 7. This
 * means that another three instructions will be executed with interrupts
 * disabled.
 */
#define CLI                                             \
                mfc0    AT,CP0_STATUS;                  \
                li      t0,ST0_CU0|0x1f;                \
                or      AT,t0;                          \
                xori    AT,0x1f;                        \
                mtc0    AT,CP0_STATUS;                  \
 
/*
 * Move to kernel mode and enable interrupts
 * Set cp0 enable bit as sign that we're running on the kernel stack
 * Use with .set noat!
 * Note that the mtc0 will be effective on R4000 pipeline stage 7. This
 * means that another three instructions will be executed with interrupts
 * disabled.  Arch/mips/kernel/r4xx0.S makes use of this fact.
 */
#define STI                                             \
                mfc0    AT,CP0_STATUS;                  \
                li      t0,ST0_CU0|0x1f;                \
                or      AT,t0;                          \
                xori    AT,0x1e;                        \
                mtc0    AT,CP0_STATUS;                  \
 
/*
 * Special nop to fill load delay slots
 */
#ifndef __R4000__
#define NOP     nop
#else
#define NOP
#endif
 
/*
 * Return from exception
 */
#if defined (CONFIG_CPU_R3000)
#define ERET rfe
#elif defined (CONFIG_CPU_R4X00) || defined (CONFIG_CPU_R4600)
#define ERET                                            \
                .set    mips3;                          \
                eret;                                   \
                .set    mips0
#else
#error "Implement ERET macro!"
#endif
 
/*
 * R8000/R10000 (MIPS ISA IV) pref instruction.
 * Use with .set noreorder only!
 */
#if defined (CONFIG_CPU_R8000) || defined(CONFIG_CPU_R10000)
#define PREF(hint,addr)                                 \
                pref    hint,addr
#define PREFX(hint,addr)                                \
                prefx   hint,addr
#else
#define PREF
#define PREFX
#endif
 
/*
 * R8000/R10000 (MIPS ISA IV) movn/movz instructions and
 * equivalents for old CPUs. Use with .set noreorder only!
 */
#if defined (CONFIG_CPU_R8000) || defined (CONFIG_CPU_R10000)
#define MOVN(rd,rs,rt)                                  \
                movn    rd,rs,rt
#define MOVZ(rd,rs,rt)                                  \
                movz    rd,rs,rt
#elif defined (CONFIG_CPU_R4000) || defined (CONFIG_CPU_R6000)
#define MOVN(rd,rs,rt)                                  \
                bnezl   rt,9f                           \
                move    rd,rs                           \
9:
#define MOVZ(rd,rs,rt)                                  \
                beqzl   rt,9f                           \
                movz    rd,rt                           \
9:
#else /* R2000, R3000 */
#define MOVN(rd,rs,rt)                                  \
                beqz    rt,9f                           \
                nop                                     \
                move    rd,rs                           \
9:
#define MOVZ(rd,rs,rt)                                  \
                bneqz   rt,9f                           \
                nop                                     \
                movz    rd,rt                           \
9:
#endif
 
#endif /* __ASM_ASM_H */

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[/] [or1k/] [trunk/] [rc203soc/] [sw/] [uClinux/] [include/] [asm-mips/] [asm.h] - Blame information for rev 1765

Line No.	Rev	Author	Line
1	1633	jcastillo	`/*`
2			`* include/asm-mips/asm.h`
3			`*`
4			`* This file is subject to the terms and conditions of the GNU General Public`
5			`* License. See the file "COPYING" in the main directory of this archive`
6			`* for more details.`
7			`*`
8			`* Copyright (C) 1995 by Ralf Baechle`
9			`*`
10			`* Some useful macros for MIPS assembler code`
11			`*`
12			`* Some of the routines below contain useless nops that will be optimized`
13			`* away by gas in -O mode. These nops are however required to fill delay`
14			`* slots in noreorder mode.`
15			`*/`
16			`#ifndef __ASM_ASM_H`
17			`#define __ASM_ASM_H`
18
19			`#include <linux/config.h>`
20			`#include <asm/regdef.h>`
21			`#include <asm/fpregdef.h>`
22
23			`#ifndef CAT`
24			`#ifdef __STDC__`
25			`#define __CAT(str1,str2) str1##str2`
26			`#else`
27			`#define __CAT(str1,str2) str1/**/str2`
28			`#endif`
29			`#define CAT(str1,str2) __CAT(str1,str2)`
30			`#endif`
31
32			`/*`
33			`* Macros to handle different pointer sizes for 32/64-bit code`
34			`*/`
35			`#if __mips == 3`
36			`#define PTR .quad`
37			`#define PTRSIZE 8`
38			`#define PTRLOG 3`
39			`#define lp ld`
40			`#else`
41			`#define PTR .word`
42			`#define PTRSIZE 4`
43			`#define PTRLOG 2`
44			`#define lp lw`
45			`#endif`
46
47			`/*`
48			`* ELF specific declarations`
49			`*/`
50			`#ifdef __ELF__`
51			`#define TYPE(symbol,_type) \`
52			`.type symbol,@_type`
53			`#define SIZE(symbol,_size) \`
54			`.size symbol,_size`
55			`#else`
56			`#define TYPE(symbol,type)`
57			`#define SIZE(symbol,size)`
58			`#endif`
59
60			`/*`
61			`* PIC specific declarations`
62			`* Not used for the kernel but here seems to be the right place.`
63			`*/`
64			`#ifdef __PIC__`
65			`#define CPRESTORE(register) \`
66			`.cprestore register`
67			`#define CPADD(register) \`
68			`.cpadd register`
69			`#define CPLOAD(register) \`
70			`.cpload register`
71			`#else`
72			`#define CPRESTORE(register)`
73			`#define CPADD(register)`
74			`#define CPLOAD(register)`
75			`#endif`
76
77			`/*`
78			`* LEAF - declare leaf routine`
79			`*/`
80			`#define LEAF(symbol) \`
81			`.globl symbol; \`
82			`.align 2; \`
83			`TYPE(symbol,function); \`
84			`.ent symbol,0; \`
85			`symbol: .frame sp,0,ra`
86
87			`/*`
88			`* NESTED - declare nested routine entry point`
89			`*/`
90			`#define NESTED(symbol, framesize, rpc) \`
91			`.globl symbol; \`
92			`.align 2; \`
93			`TYPE(symbol,function); \`
94			`.ent symbol,0; \`
95			`symbol: .frame sp, framesize, rpc`
96
97			`/*`
98			`* END - mark end of function`
99			`*/`
100			`#define END(function) \`
101			`.end function; \`
102			`SIZE(function,.-function)`
103
104			`/*`
105			`* EXPORT - export definition of symbol`
106			`*/`
107			`#define EXPORT(symbol) \`
108			`.globl symbol; \`
109			`symbol:`
110
111			`/*`
112			`* ABS - export absolute symbol`
113			`*/`
114			`#define ABS(symbol,value) \`
115			`.globl symbol; \`
116			`symbol = value`
117
118			`#define PANIC(msg) \`
119			`la a0,8f; \`
120			`jal panic; \`
121			`nop; \`
122			`9: b 9b; \`
123			`nop; \`
124			`TEXT(msg)`
125
126			`/*`
127			`* Print formated string`
128			`*/`
129			`#define PRINT(string) \`
130			`la a0,8f; \`
131			`jal printk; \`
132			`nop; \`
133			`TEXT(string)`
134
135			`#define TEXT(msg) \`
136			`.data; \`
137			`8: .asciiz msg; \`
138			`.text`
139
140			`/*`
141			`* Build text tables`
142			`*/`
143			`#define TTABLE(string) \`
144			`.text; \`
145			`.word 1f; \`
146			`.data; \`
147			`1: .asciz string; \`
148			`.text;`
149
150			`/*`
151			`* Move to kernel mode and disable interrupts`
152			`* Set cp0 enable bit as sign that we're running on the kernel stack`
153			`* Use with .set noat!`
154			`* Note that the mtc0 will be effective on R4000 pipeline stage 7. This`
155			`* means that another three instructions will be executed with interrupts`
156			`* disabled.`
157			`*/`
158			`#define CLI \`
159			`mfc0 AT,CP0_STATUS; \`
160			`li t0,ST0_CU0\|0x1f; \`
161			`or AT,t0; \`
162			`xori AT,0x1f; \`
163			`mtc0 AT,CP0_STATUS; \`
164
165			`/*`
166			`* Move to kernel mode and enable interrupts`
167			`* Set cp0 enable bit as sign that we're running on the kernel stack`
168			`* Use with .set noat!`
169			`* Note that the mtc0 will be effective on R4000 pipeline stage 7. This`
170			`* means that another three instructions will be executed with interrupts`
171			`* disabled. Arch/mips/kernel/r4xx0.S makes use of this fact.`
172			`*/`
173			`#define STI \`
174			`mfc0 AT,CP0_STATUS; \`
175			`li t0,ST0_CU0\|0x1f; \`
176			`or AT,t0; \`
177			`xori AT,0x1e; \`
178			`mtc0 AT,CP0_STATUS; \`
179
180			`/*`
181			`* Special nop to fill load delay slots`
182			`*/`
183			`#ifndef __R4000__`
184			`#define NOP nop`
185			`#else`
186			`#define NOP`
187			`#endif`
188
189			`/*`
190			`* Return from exception`
191			`*/`
192			`#if defined (CONFIG_CPU_R3000)`
193			`#define ERET rfe`
194			`#elif defined (CONFIG_CPU_R4X00) \|\| defined (CONFIG_CPU_R4600)`
195			`#define ERET \`
196			`.set mips3; \`
197			`eret; \`
198			`.set mips0`
199			`#else`
200			`#error "Implement ERET macro!"`
201			`#endif`
202
203			`/*`
204			`* R8000/R10000 (MIPS ISA IV) pref instruction.`
205			`* Use with .set noreorder only!`
206			`*/`
207			`#if defined (CONFIG_CPU_R8000) \|\| defined(CONFIG_CPU_R10000)`
208			`#define PREF(hint,addr) \`
209			`pref hint,addr`
210			`#define PREFX(hint,addr) \`
211			`prefx hint,addr`
212			`#else`
213			`#define PREF`
214			`#define PREFX`
215			`#endif`
216
217			`/*`
218			`* R8000/R10000 (MIPS ISA IV) movn/movz instructions and`
219			`* equivalents for old CPUs. Use with .set noreorder only!`
220			`*/`
221			`#if defined (CONFIG_CPU_R8000) \|\| defined (CONFIG_CPU_R10000)`
222			`#define MOVN(rd,rs,rt) \`
223			`movn rd,rs,rt`
224			`#define MOVZ(rd,rs,rt) \`
225			`movz rd,rs,rt`
226			`#elif defined (CONFIG_CPU_R4000) \|\| defined (CONFIG_CPU_R6000)`
227			`#define MOVN(rd,rs,rt) \`
228			`bnezl rt,9f \`
229			`move rd,rs \`
230			`9:`
231			`#define MOVZ(rd,rs,rt) \`
232			`beqzl rt,9f \`
233			`movz rd,rt \`
234			`9:`
235			`#else /* R2000, R3000 */`
236			`#define MOVN(rd,rs,rt) \`
237			`beqz rt,9f \`
238			`nop \`
239			`move rd,rs \`
240			`9:`
241			`#define MOVZ(rd,rs,rt) \`
242			`bneqz rt,9f \`
243			`nop \`
244			`movz rd,rt \`
245			`9:`
246			`#endif`
247
248			`#endif /* __ASM_ASM_H */`