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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/unicore32/include/asm/assembler.h
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/*

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 * linux/arch/unicore32/include/asm/assembler.h

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 *

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 * Code specific to PKUnity SoC and UniCore ISA

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 *

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 * Copyright (C) 2001-2010 GUAN Xue-tao

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 *

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 * This program is free software; you can redistribute it and/or modify

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 * it under the terms of the GNU General Public License version 2 as

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 * published by the Free Software Foundation.

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 *

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 *  Do not include any C declarations in this file - it is included by

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 *  assembler source.

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 */

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#ifndef __ASSEMBLY__

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#error "Only include this from assembly code"

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#endif

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#include <asm/ptrace.h>

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/*

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 * Little Endian independent macros for shifting bytes within registers.

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 */

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#define pull            >>

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#define push            <<

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#define get_byte_0      << #0

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#define get_byte_1	>> #8

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#define get_byte_2	>> #16

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#define get_byte_3	>> #24

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#define put_byte_0      << #0

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#define put_byte_1	<< #8

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#define put_byte_2	<< #16

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#define put_byte_3	<< #24

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#define cadd		cmpadd

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#define cand		cmpand

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#define csub		cmpsub

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#define cxor		cmpxor

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/*

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 * Enable and disable interrupts

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 */

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	.macro disable_irq, temp

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	mov	\temp, asr

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	andn     \temp, \temp, #0xFF

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	or	\temp, \temp, #PSR_I_BIT | PRIV_MODE

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	mov.a	asr, \temp

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	.endm

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	.macro enable_irq, temp

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	mov	\temp, asr

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	andn     \temp, \temp, #0xFF

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	or	\temp, \temp, #PRIV_MODE

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	mov.a	asr, \temp

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	.endm

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#define USER(x...)				\

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9999:	x;					\

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	.pushsection __ex_table, "a";		\

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	.align	3;				\

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	.long	9999b, 9001f;			\

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	.popsection

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	.macro	notcond, cond, nexti = .+8

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	.ifc	\cond, eq

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		bne	\nexti

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	.else;	.ifc	\cond, ne

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		beq	\nexti

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	.else;	.ifc	\cond, ea

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		bub	\nexti

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	.else;	.ifc	\cond, ub

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		bea	\nexti

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	.else;	.ifc	\cond, fs

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		bns	\nexti

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	.else;	.ifc	\cond, ns

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		bfs	\nexti

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	.else;	.ifc	\cond, fv

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		bnv	\nexti

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	.else;	.ifc	\cond, nv

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		bfv	\nexti

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	.else;	.ifc	\cond, ua

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		beb	\nexti

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	.else;	.ifc	\cond, eb

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		bua	\nexti

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	.else;	.ifc	\cond, eg

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		bsl	\nexti

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	.else;	.ifc	\cond, sl

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		beg	\nexti

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	.else;	.ifc	\cond, sg

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		bel	\nexti

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	.else;	.ifc	\cond, el

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		bsg	\nexti

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	.else;	.ifnc	\cond, al

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		.error  "Unknown cond in notcond macro argument"

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	.endif;	.endif;	.endif;	.endif;	.endif;	.endif;	.endif

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	.endif;	.endif;	.endif;	.endif;	.endif;	.endif;	.endif

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	.endif

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	.endm

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	.macro	usracc, instr, reg, ptr, inc, cond, rept, abort

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	.rept	\rept

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	notcond	\cond, .+8

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9999 :

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	.if	\inc == 1

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	\instr\()b.u \reg, [\ptr], #\inc

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	.elseif	\inc == 4

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	\instr\()w.u \reg, [\ptr], #\inc

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	.else

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	.error	"Unsupported inc macro argument"

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	.endif

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	.pushsection __ex_table, "a"

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	.align	3

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	.long	9999b, \abort

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	.popsection

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	.endr

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	.endm

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	.macro	strusr, reg, ptr, inc, cond = al, rept = 1, abort = 9001f

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	usracc	st, \reg, \ptr, \inc, \cond, \rept, \abort

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	.endm

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	.macro	ldrusr, reg, ptr, inc, cond = al, rept = 1, abort = 9001f

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	usracc	ld, \reg, \ptr, \inc, \cond, \rept, \abort

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	.endm

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	.macro	nop8

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	.rept	8

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		nop

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	.endr

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	.endm

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