assembler.h

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/*
 * linux/arch/unicore32/include/asm/assembler.h
 *
 * Code specific to PKUnity SoC and UniCore ISA
 *
 * Copyright (C) 2001-2010 GUAN Xue-tao
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 *  Do not include any C declarations in this file - it is included by
 *  assembler source.
 */
#ifndef __ASSEMBLY__
#error "Only include this from assembly code"
#endif

#include <asm/ptrace.h>

/*
 * Little Endian independent macros for shifting bytes within registers.
 */
#define pull            >>
#define push            <<
#define get_byte_0      << #0
#define get_byte_1  >> #8
#define get_byte_2  >> #16
#define get_byte_3  >> #24
#define put_byte_0      << #0
#define put_byte_1  << #8
#define put_byte_2  << #16
#define put_byte_3  << #24

#define cadd        cmpadd
#define cand        cmpand
#define csub        cmpsub
#define cxor        cmpxor

/*
 * Enable and disable interrupts
 */
    .macro disable_irq, temp
    mov	\temp, asr
    andn     \temp, \temp, #0xFF
    or	\temp, \temp, #PSR_I_BIT | PRIV_MODE
    mov.a   asr, \temp
    .endm

    .macro enable_irq, temp
    mov	\temp, asr
    andn     \temp, \temp, #0xFF
    or	\temp, \temp, #PRIV_MODE
    mov.a   asr, \temp
    .endm

#define USER(x...)              \
9999:   x;                  \
    .pushsection __ex_table, "a";       \
    .align  3;              \
    .long   9999b, 9001f;           \
    .popsection

    .macro  notcond, cond, nexti = .+8
    .ifc    \cond, eq
        bne \nexti
    .else;  .ifc    \cond, ne
        beq \nexti
    .else;  .ifc    \cond, ea
        bub \nexti
    .else;  .ifc    \cond, ub
        bea \nexti
    .else;  .ifc    \cond, fs
        bns \nexti
    .else;  .ifc    \cond, ns
        bfs \nexti
    .else;  .ifc    \cond, fv
        bnv \nexti
    .else;  .ifc    \cond, nv
        bfv \nexti
    .else;  .ifc    \cond, ua
        beb \nexti
    .else;  .ifc    \cond, eb
        bua \nexti
    .else;  .ifc    \cond, eg
        bsl \nexti
    .else;  .ifc    \cond, sl
        beg \nexti
    .else;  .ifc    \cond, sg
        bel \nexti
    .else;  .ifc    \cond, el
        bsg \nexti
    .else;  .ifnc   \cond, al
        .error  "Unknown cond in notcond macro argument"
    .endif; .endif; .endif; .endif; .endif; .endif; .endif
    .endif; .endif; .endif; .endif; .endif; .endif; .endif
    .endif
    .endm

    .macro  usracc, instr, reg, ptr, inc, cond, rept, abort
    .rept   \rept
    notcond	\cond, .+8
9999 :
    .if \inc == 1
    \instr\()b.u \reg, [\ptr], #\inc
    .elseif \inc == 4
    \instr\()w.u \reg, [\ptr], #\inc
    .else
    .error  "Unsupported inc macro argument"
    .endif

    .pushsection __ex_table, "a"
    .align  3
    .long   9999b, \abort
    .popsection
    .endr
    .endm

    .macro  strusr, reg, ptr, inc, cond = al, rept = 1, abort = 9001f
    usracc  st, \reg, \ptr, \inc, \cond, \rept, \abort
    .endm

    .macro  ldrusr, reg, ptr, inc, cond = al, rept = 1, abort = 9001f
    usracc  ld, \reg, \ptr, \inc, \cond, \rept, \abort
    .endm

    .macro  nop8
    .rept   8
        nop
    .endr
    .endm