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TOMOYO Linux Cross Reference
Linux/arch/unicore32/include/asm/assembler.h

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  1 /*
  2  * linux/arch/unicore32/include/asm/assembler.h
  3  *
  4  * Code specific to PKUnity SoC and UniCore ISA
  5  *
  6  * Copyright (C) 2001-2010 GUAN Xue-tao
  7  *
  8  * This program is free software; you can redistribute it and/or modify
  9  * it under the terms of the GNU General Public License version 2 as
 10  * published by the Free Software Foundation.
 11  *
 12  *  Do not include any C declarations in this file - it is included by
 13  *  assembler source.
 14  */
 15 #ifndef __ASSEMBLY__
 16 #error "Only include this from assembly code"
 17 #endif
 18 
 19 #include <asm/ptrace.h>
 20 
 21 /*
 22  * Little Endian independent macros for shifting bytes within registers.
 23  */
 24 #define pull            >>
 25 #define push            <<
 26 #define get_byte_0      << #0
 27 #define get_byte_1      >> #8
 28 #define get_byte_2      >> #16
 29 #define get_byte_3      >> #24
 30 #define put_byte_0      << #0
 31 #define put_byte_1      << #8
 32 #define put_byte_2      << #16
 33 #define put_byte_3      << #24
 34 
 35 #define cadd            cmpadd
 36 #define cand            cmpand
 37 #define csub            cmpsub
 38 #define cxor            cmpxor
 39 
 40 /*
 41  * Enable and disable interrupts
 42  */
 43         .macro disable_irq, temp
 44         mov     \temp, asr
 45         andn     \temp, \temp, #0xFF
 46         or      \temp, \temp, #PSR_I_BIT | PRIV_MODE
 47         mov.a   asr, \temp
 48         .endm
 49 
 50         .macro enable_irq, temp
 51         mov     \temp, asr
 52         andn     \temp, \temp, #0xFF
 53         or      \temp, \temp, #PRIV_MODE
 54         mov.a   asr, \temp
 55         .endm
 56 
 57 #define USER(x...)                              \
 58 9999:   x;                                      \
 59         .pushsection __ex_table, "a";           \
 60         .align  3;                              \
 61         .long   9999b, 9001f;                   \
 62         .popsection
 63 
 64         .macro  notcond, cond, nexti = .+8
 65         .ifc    \cond, eq
 66                 bne     \nexti
 67         .else;  .ifc    \cond, ne
 68                 beq     \nexti
 69         .else;  .ifc    \cond, ea
 70                 bub     \nexti
 71         .else;  .ifc    \cond, ub
 72                 bea     \nexti
 73         .else;  .ifc    \cond, fs
 74                 bns     \nexti
 75         .else;  .ifc    \cond, ns
 76                 bfs     \nexti
 77         .else;  .ifc    \cond, fv
 78                 bnv     \nexti
 79         .else;  .ifc    \cond, nv
 80                 bfv     \nexti
 81         .else;  .ifc    \cond, ua
 82                 beb     \nexti
 83         .else;  .ifc    \cond, eb
 84                 bua     \nexti
 85         .else;  .ifc    \cond, eg
 86                 bsl     \nexti
 87         .else;  .ifc    \cond, sl
 88                 beg     \nexti
 89         .else;  .ifc    \cond, sg
 90                 bel     \nexti
 91         .else;  .ifc    \cond, el
 92                 bsg     \nexti
 93         .else;  .ifnc   \cond, al
 94                 .error  "Unknown cond in notcond macro argument"
 95         .endif; .endif; .endif; .endif; .endif; .endif; .endif
 96         .endif; .endif; .endif; .endif; .endif; .endif; .endif
 97         .endif
 98         .endm
 99 
100         .macro  usracc, instr, reg, ptr, inc, cond, rept, abort
101         .rept   \rept
102         notcond \cond, .+8
103 9999 :
104         .if     \inc == 1
105         \instr\()b.u \reg, [\ptr], #\inc
106         .elseif \inc == 4
107         \instr\()w.u \reg, [\ptr], #\inc
108         .else
109         .error  "Unsupported inc macro argument"
110         .endif
111 
112         .pushsection __ex_table, "a"
113         .align  3
114         .long   9999b, \abort
115         .popsection
116         .endr
117         .endm
118 
119         .macro  strusr, reg, ptr, inc, cond = al, rept = 1, abort = 9001f
120         usracc  st, \reg, \ptr, \inc, \cond, \rept, \abort
121         .endm
122 
123         .macro  ldrusr, reg, ptr, inc, cond = al, rept = 1, abort = 9001f
124         usracc  ld, \reg, \ptr, \inc, \cond, \rept, \abort
125         .endm
126 
127         .macro  nop8
128         .rept   8
129                 nop
130         .endr
131         .endm
132 

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