d2912cb15b
Based on 2 normalized pattern(s): 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 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 # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
94 lines
1.6 KiB
ArmAsm
94 lines
1.6 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* linux/arch/unicore32/lib/copy_to_user.S
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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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#include <linux/linkage.h>
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#include <asm/assembler.h>
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/*
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* Prototype:
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*
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* size_t raw_copy_to_user(void *to, const void *from, size_t n)
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*
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* Purpose:
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*
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* copy a block to user memory from kernel memory
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*
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* Params:
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*
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* to = user memory
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* from = kernel memory
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* n = number of bytes to copy
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*
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* Return value:
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*
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* Number of bytes NOT copied.
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*/
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.macro ldr1w ptr reg abort
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ldw.w \reg, [\ptr]+, #4
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.endm
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.macro ldr4w ptr reg1 reg2 reg3 reg4 abort
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ldm.w (\reg1, \reg2, \reg3, \reg4), [\ptr]+
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.endm
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.macro ldr8w ptr reg1 reg2 reg3 reg4 reg5 reg6 reg7 reg8 abort
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ldm.w (\reg1, \reg2, \reg3, \reg4, \reg5, \reg6, \reg7, \reg8), [\ptr]+
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.endm
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.macro ldr1b ptr reg cond=al abort
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notcond \cond, .+8
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ldb.w \reg, [\ptr]+, #1
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.endm
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.macro str1w ptr reg abort
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strusr \reg, \ptr, 4, abort=\abort
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.endm
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.macro str8w ptr reg1 reg2 reg3 reg4 reg5 reg6 reg7 reg8 abort
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100: stm.w (\reg1, \reg2, \reg3, \reg4, \reg5, \reg6, \reg7, \reg8), [\ptr]+
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.pushsection __ex_table, "a"
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.long 100b, \abort
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.popsection
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.endm
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.macro str1b ptr reg cond=al abort
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strusr \reg, \ptr, 1, \cond, abort=\abort
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.endm
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.macro enter
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mov r3, #0
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stm.w (r0, r2, r3), [sp-]
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.endm
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.macro exit
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add sp, sp, #8
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ldm.w (r0), [sp]+
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mov pc, lr
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.endm
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.text
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WEAK(raw_copy_to_user)
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#include "copy_template.S"
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ENDPROC(raw_copy_to_user)
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.pushsection .fixup,"ax"
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.align 0
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copy_abort_preamble
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ldm.w (r1, r2, r3), [sp]+
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sub r0, r0, r1
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rsub r0, r0, r2
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copy_abort_end
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.popsection
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