include/asm-arm/proc-armo/assembler.h

   1 /*
   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 #define MODE_USR        USR26_MODE
  10 #define MODE_FIQ        FIQ26_MODE
  11 #define MODE_IRQ        IRQ26_MODE
  12 #define MODE_SVC        SVC26_MODE
  13
  14 #define DEFAULT_FIQ     MODE_FIQ
  15
  16 #ifdef __STDC__
  17 #define LOADREGS(cond, base, reglist...)\
  18         ldm##cond       base,reglist^
  19
  20 #define RETINSTR(instr, regs...)\
  21         instr##s        regs
  22 #else
  23 #define LOADREGS(cond, base, reglist...)\
  24         ldm/**/cond     base,reglist^
  25
  26 #define RETINSTR(instr, regs...)\
  27         instr/**/s      regs
  28 #endif
  29
  30 #define MODENOP\
  31         mov     r0, r0
  32
  33 #define MODE(savereg,tmpreg,mode) \
  34         mov     savereg, pc; \
  35         bic     tmpreg, savereg, $0x0c000003; \
  36         orr     tmpreg, tmpreg, $mode; \
  37         teqp    tmpreg, $0
  38
  39 #define RESTOREMODE(savereg) \
  40         teqp    savereg, $0
  41
  42 #define SAVEIRQS(tmpreg)
  43
  44 #define RESTOREIRQS(tmpreg)
  45
  46 #define DISABLEIRQS(tmpreg)\
  47         teqp    pc, $0x08000003
  48
  49 #define ENABLEIRQS(tmpreg)\
  50         teqp    pc, $0x00000003
  51
  52 #define USERMODE(tmpreg)\
  53         teqp    pc, $0x00000000;\
  54         mov     r0, r0
  55
  56 #define SVCMODE(tmpreg)\
  57         teqp    pc, $0x00000003;\
  58         mov     r0, r0
  59
  60
  61 /*
  62  * Save the current IRQ state and disable IRQs
  63  * Note that this macro assumes FIQs are enabled, and
  64  * that the processor is in SVC mode.
  65  */
  66         .macro  save_and_disable_irqs, oldcpsr, temp
  67   mov \oldcpsr, pc
  68   orr \temp, \oldcpsr, #0x08000000
  69   teqp \temp, #0
  70   .endm
  71
  72 /*
  73  * Restore interrupt state previously stored in
  74  * a register
  75  * ** Actually do nothing on Arc - hope that the caller uses a MOVS PC soon
  76  * after!
  77  */
  78         .macro  restore_irqs, oldcpsr
  79   @ This be restore_irqs
  80   .endm
  81
  82 /*
  83  * These two are used to save LR/restore PC over a user-based access.
  84  * The old 26-bit architecture requires that we do.  On 32-bit
  85  * architecture, we can safely ignore this requirement.
  86  */
  87         .macro  save_lr
  88         str     lr, [sp, #-4]!
  89         .endm
  90
  91         .macro  restore_pc
  92         ldmfd   sp!, {pc}^
  93         .endm
  94
  95 #define USER(x...)                              \
  96 9999:   x;                                      \
  97         .section __ex_table,"a";                \
  98         .align  3;                              \
  99         .long   9999b,9001f;                    \
 100         .previous
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