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/*
 * linux/asm-arm/proc-armo/assembler.h
 *
 * Copyright (C) 1996 Russell King
 *
 * This file contains arm architecture specific defines
 * for the different processors
 */
 
/*
 * LOADREGS: multiple register load (ldm) with pc in register list
 *              (takes account of ARM6 not using ^)
 *
 * RETINSTR: return instruction: adds the 's' in at the end of the
 *              instruction if this is not an ARM6
 *
 * SAVEIRQS: save IRQ state (not required on ARM2/ARM3 - done
 *              implicitly
 *
 * RESTOREIRQS: restore IRQ state (not required on ARM2/ARM3 - done
 *              implicitly with ldm ... ^ or movs.
 *
 * These next two need thinking about - can't easily use stack... (see system.S)
 * DISABLEIRQS: disable IRQS in SVC mode
 *
 * ENABLEIRQS: enable IRQS in SVC mode
 *
 * USERMODE: switch to USER mode
 *
 * SVCMODE: switch to SVC mode
 */
 
#define N_BIT   (1 << 31)
#define Z_BIT   (1 << 30)
#define C_BIT   (1 << 29)
#define V_BIT   (1 << 28)
 
#define PCMASK  0xfc000003
 
#ifdef __ASSEMBLER__
 
#define I_BIT   (1 << 27)
#define F_BIT   (1 << 26)
 
#define MODE_USR        0
#define MODE_FIQ        1
#define MODE_IRQ        2
#define MODE_SVC        3
 
#define DEFAULT_FIQ     MODE_FIQ
 
#define LOADREGS(cond, base, reglist...)\
        ldm##cond       base,reglist^
 
#define RETINSTR(instr, regs...)\
        instr##s        regs
 
#define MODENOP\
        mov     r0, r0
 
#define MODE(savereg,tmpreg,mode) \
        mov     savereg, pc; \
        bic     tmpreg, savereg, $0x0c000003; \
        orr     tmpreg, tmpreg, $mode; \
        teqp    tmpreg, $0
 
#define RESTOREMODE(savereg) \
        teqp    savereg, $0
 
#define SAVEIRQS(tmpreg)
 
#define RESTOREIRQS(tmpreg)
 
#define DISABLEIRQS(tmpreg)\
        teqp    pc, $0x08000003
 
#define ENABLEIRQS(tmpreg)\
        teqp    pc, $0x00000003
 
#define USERMODE(tmpreg)\
        teqp    pc, $0x00000000;\
        mov     r0, r0
 
#define SVCMODE(tmpreg)\
        teqp    pc, $0x00000003;\
        mov     r0, r0
 
#endif

Line No.	Rev	Author	Line
1	1633	jcastillo	`/*`
2			`* linux/asm-arm/proc-armo/assembler.h`
3			`*`
4			`* Copyright (C) 1996 Russell King`
5			`*`
6			`* This file contains arm architecture specific defines`
7			`* for the different processors`
8			`*/`
9
10			`/*`
11			`* LOADREGS: multiple register load (ldm) with pc in register list`
12			`* (takes account of ARM6 not using ^)`
13			`*`
14			`* RETINSTR: return instruction: adds the 's' in at the end of the`
15			`* instruction if this is not an ARM6`
16			`*`
17			`* SAVEIRQS: save IRQ state (not required on ARM2/ARM3 - done`
18			`* implicitly`
19			`*`
20			`* RESTOREIRQS: restore IRQ state (not required on ARM2/ARM3 - done`
21			`* implicitly with ldm ... ^ or movs.`
22			`*`
23			`* These next two need thinking about - can't easily use stack... (see system.S)`
24			`* DISABLEIRQS: disable IRQS in SVC mode`
25			`*`
26			`* ENABLEIRQS: enable IRQS in SVC mode`
27			`*`
28			`* USERMODE: switch to USER mode`
29			`*`
30			`* SVCMODE: switch to SVC mode`
31			`*/`
32
33			`#define N_BIT (1 << 31)`
34			`#define Z_BIT (1 << 30)`
35			`#define C_BIT (1 << 29)`
36			`#define V_BIT (1 << 28)`
37
38			`#define PCMASK 0xfc000003`
39
40			`#ifdef __ASSEMBLER__`
41
42			`#define I_BIT (1 << 27)`
43			`#define F_BIT (1 << 26)`
44
45			`#define MODE_USR 0`
46			`#define MODE_FIQ 1`
47			`#define MODE_IRQ 2`
48			`#define MODE_SVC 3`
49
50			`#define DEFAULT_FIQ MODE_FIQ`
51
52			`#define LOADREGS(cond, base, reglist...)\`
53			`ldm##cond base,reglist^`
54
55			`#define RETINSTR(instr, regs...)\`
56			`instr##s regs`
57
58			`#define MODENOP\`
59			`mov r0, r0`
60
61			`#define MODE(savereg,tmpreg,mode) \`
62			`mov savereg, pc; \`
63			`bic tmpreg, savereg, $0x0c000003; \`
64			`orr tmpreg, tmpreg, $mode; \`
65			`teqp tmpreg, $0`
66
67			`#define RESTOREMODE(savereg) \`
68			`teqp savereg, $0`
69
70			`#define SAVEIRQS(tmpreg)`
71
72			`#define RESTOREIRQS(tmpreg)`
73
74			`#define DISABLEIRQS(tmpreg)\`
75			`teqp pc, $0x08000003`
76
77			`#define ENABLEIRQS(tmpreg)\`
78			`teqp pc, $0x00000003`
79
80			`#define USERMODE(tmpreg)\`
81			`teqp pc, $0x00000000;\`
82			`mov r0, r0`
83
84			`#define SVCMODE(tmpreg)\`
85			`teqp pc, $0x00000003;\`
86			`mov r0, r0`
87
88			`#endif`

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[/] [or1k_old/] [trunk/] [rc203soc/] [sw/] [uClinux/] [include/] [asm-armnommu/] [proc-armo/] [assembler.h] - Blame information for rev 1782