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nios2: Assembly macros and definitions
This patch add assembly macros and definitions used in the .S files across arch/nios2/ and together with asm-offsets.c. Signed-off-by: Ley Foon Tan <lftan@altera.com>
This commit is contained in:
Ley Foon Tan
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39b505cb79
309
arch/nios2/include/asm/asm-macros.h
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309
arch/nios2/include/asm/asm-macros.h
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/*
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* Macro used to simplify coding multi-line assembler.
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* Some of the bit test macro can simplify down to one line
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* depending on the mask value.
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*
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* Copyright (C) 2004 Microtronix Datacom Ltd.
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*
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* All rights reserved.
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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 as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
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* NON INFRINGEMENT. See the GNU General Public License for more
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* details.
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*
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*/
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#ifndef _ASM_NIOS2_ASMMACROS_H
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#define _ASM_NIOS2_ASMMACROS_H
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/*
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* ANDs reg2 with mask and places the result in reg1.
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*
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* You cannnot use the same register for reg1 & reg2.
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*/
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.macro ANDI32 reg1, reg2, mask
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.if \mask & 0xffff
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.if \mask & 0xffff0000
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movhi \reg1, %hi(\mask)
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movui \reg1, %lo(\mask)
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and \reg1, \reg1, \reg2
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.else
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andi \reg1, \reg2, %lo(\mask)
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.endif
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.else
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andhi \reg1, \reg2, %hi(\mask)
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.endif
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.endm
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/*
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* ORs reg2 with mask and places the result in reg1.
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*
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* It is safe to use the same register for reg1 & reg2.
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*/
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.macro ORI32 reg1, reg2, mask
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.if \mask & 0xffff
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.if \mask & 0xffff0000
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orhi \reg1, \reg2, %hi(\mask)
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ori \reg1, \reg2, %lo(\mask)
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.else
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ori \reg1, \reg2, %lo(\mask)
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.endif
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.else
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orhi \reg1, \reg2, %hi(\mask)
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.endif
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.endm
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/*
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* XORs reg2 with mask and places the result in reg1.
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*
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* It is safe to use the same register for reg1 & reg2.
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*/
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.macro XORI32 reg1, reg2, mask
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.if \mask & 0xffff
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.if \mask & 0xffff0000
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xorhi \reg1, \reg2, %hi(\mask)
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xori \reg1, \reg1, %lo(\mask)
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.else
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xori \reg1, \reg2, %lo(\mask)
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.endif
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.else
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xorhi \reg1, \reg2, %hi(\mask)
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.endif
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.endm
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/*
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* This is a support macro for BTBZ & BTBNZ. It checks
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* the bit to make sure it is valid 32 value.
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*
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* It is safe to use the same register for reg1 & reg2.
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*/
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.macro BT reg1, reg2, bit
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.if \bit > 31
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.err
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.else
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.if \bit < 16
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andi \reg1, \reg2, (1 << \bit)
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.else
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andhi \reg1, \reg2, (1 << (\bit - 16))
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.endif
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.endif
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.endm
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/*
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* Tests the bit in reg2 and branches to label if the
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* bit is zero. The result of the bit test is stored in reg1.
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*
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* It is safe to use the same register for reg1 & reg2.
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*/
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.macro BTBZ reg1, reg2, bit, label
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BT \reg1, \reg2, \bit
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beq \reg1, r0, \label
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.endm
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/*
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* Tests the bit in reg2 and branches to label if the
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* bit is non-zero. The result of the bit test is stored in reg1.
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*
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* It is safe to use the same register for reg1 & reg2.
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*/
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.macro BTBNZ reg1, reg2, bit, label
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BT \reg1, \reg2, \bit
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bne \reg1, r0, \label
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.endm
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/*
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* Tests the bit in reg2 and then compliments the bit in reg2.
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* The result of the bit test is stored in reg1.
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*
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* It is NOT safe to use the same register for reg1 & reg2.
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*/
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.macro BTC reg1, reg2, bit
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.if \bit > 31
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.err
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.else
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.if \bit < 16
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andi \reg1, \reg2, (1 << \bit)
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xori \reg2, \reg2, (1 << \bit)
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.else
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andhi \reg1, \reg2, (1 << (\bit - 16))
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xorhi \reg2, \reg2, (1 << (\bit - 16))
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.endif
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.endif
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.endm
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/*
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* Tests the bit in reg2 and then sets the bit in reg2.
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* The result of the bit test is stored in reg1.
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*
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* It is NOT safe to use the same register for reg1 & reg2.
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*/
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.macro BTS reg1, reg2, bit
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.if \bit > 31
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.err
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.else
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.if \bit < 16
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andi \reg1, \reg2, (1 << \bit)
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ori \reg2, \reg2, (1 << \bit)
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.else
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andhi \reg1, \reg2, (1 << (\bit - 16))
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orhi \reg2, \reg2, (1 << (\bit - 16))
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.endif
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.endif
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.endm
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/*
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* Tests the bit in reg2 and then resets the bit in reg2.
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* The result of the bit test is stored in reg1.
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*
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* It is NOT safe to use the same register for reg1 & reg2.
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*/
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.macro BTR reg1, reg2, bit
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.if \bit > 31
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.err
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.else
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.if \bit < 16
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andi \reg1, \reg2, (1 << \bit)
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andi \reg2, \reg2, %lo(~(1 << \bit))
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.else
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andhi \reg1, \reg2, (1 << (\bit - 16))
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andhi \reg2, \reg2, %lo(~(1 << (\bit - 16)))
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.endif
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.endif
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.endm
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/*
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* Tests the bit in reg2 and then compliments the bit in reg2.
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* The result of the bit test is stored in reg1. If the
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* original bit was zero it branches to label.
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*
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* It is NOT safe to use the same register for reg1 & reg2.
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*/
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.macro BTCBZ reg1, reg2, bit, label
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BTC \reg1, \reg2, \bit
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beq \reg1, r0, \label
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.endm
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/*
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* Tests the bit in reg2 and then compliments the bit in reg2.
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* The result of the bit test is stored in reg1. If the
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* original bit was non-zero it branches to label.
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*
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* It is NOT safe to use the same register for reg1 & reg2.
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*/
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.macro BTCBNZ reg1, reg2, bit, label
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BTC \reg1, \reg2, \bit
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bne \reg1, r0, \label
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.endm
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/*
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* Tests the bit in reg2 and then sets the bit in reg2.
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* The result of the bit test is stored in reg1. If the
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* original bit was zero it branches to label.
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*
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* It is NOT safe to use the same register for reg1 & reg2.
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*/
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.macro BTSBZ reg1, reg2, bit, label
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BTS \reg1, \reg2, \bit
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beq \reg1, r0, \label
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.endm
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/*
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* Tests the bit in reg2 and then sets the bit in reg2.
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* The result of the bit test is stored in reg1. If the
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* original bit was non-zero it branches to label.
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*
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* It is NOT safe to use the same register for reg1 & reg2.
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*/
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.macro BTSBNZ reg1, reg2, bit, label
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BTS \reg1, \reg2, \bit
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bne \reg1, r0, \label
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.endm
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/*
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* Tests the bit in reg2 and then resets the bit in reg2.
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* The result of the bit test is stored in reg1. If the
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* original bit was zero it branches to label.
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*
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* It is NOT safe to use the same register for reg1 & reg2.
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*/
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.macro BTRBZ reg1, reg2, bit, label
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BTR \reg1, \reg2, \bit
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bne \reg1, r0, \label
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.endm
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/*
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* Tests the bit in reg2 and then resets the bit in reg2.
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* The result of the bit test is stored in reg1. If the
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* original bit was non-zero it branches to label.
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*
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* It is NOT safe to use the same register for reg1 & reg2.
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*/
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.macro BTRBNZ reg1, reg2, bit, label
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BTR \reg1, \reg2, \bit
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bne \reg1, r0, \label
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.endm
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/*
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* Tests the bits in mask against reg2 stores the result in reg1.
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* If the all the bits in the mask are zero it branches to label.
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*
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* It is safe to use the same register for reg1 & reg2.
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*/
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.macro TSTBZ reg1, reg2, mask, label
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ANDI32 \reg1, \reg2, \mask
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beq \reg1, r0, \label
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.endm
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/*
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* Tests the bits in mask against reg2 stores the result in reg1.
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* If the any of the bits in the mask are 1 it branches to label.
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*
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* It is safe to use the same register for reg1 & reg2.
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*/
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.macro TSTBNZ reg1, reg2, mask, label
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ANDI32 \reg1, \reg2, \mask
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bne \reg1, r0, \label
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.endm
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/*
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* Pushes reg onto the stack.
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*/
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.macro PUSH reg
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addi sp, sp, -4
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stw \reg, 0(sp)
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.endm
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/*
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* Pops the top of the stack into reg.
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*/
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.macro POP reg
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ldw \reg, 0(sp)
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addi sp, sp, 4
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.endm
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#endif /* _ASM_NIOS2_ASMMACROS_H */
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20
arch/nios2/include/asm/asm-offsets.h
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20
arch/nios2/include/asm/asm-offsets.h
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/*
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* Copyright (C) 2010 Tobias Klauser <tklauser@distanz.ch>
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* Copyright (C) 2009 Thomas Chou <thomas@wytron.com.tw>
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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 as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include <generated/asm-offsets.h>
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88
arch/nios2/kernel/asm-offsets.c
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88
arch/nios2/kernel/asm-offsets.c
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/*
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* Copyright (C) 2011 Tobias Klauser <tklauser@distanz.ch>
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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 as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include <linux/stddef.h>
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#include <linux/sched.h>
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#include <linux/kernel_stat.h>
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#include <linux/ptrace.h>
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#include <linux/hardirq.h>
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#include <linux/thread_info.h>
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#include <linux/kbuild.h>
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int main(void)
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{
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/* struct task_struct */
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OFFSET(TASK_THREAD, task_struct, thread);
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BLANK();
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/* struct thread_struct */
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OFFSET(THREAD_KSP, thread_struct, ksp);
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OFFSET(THREAD_KPSR, thread_struct, kpsr);
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BLANK();
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/* struct pt_regs */
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OFFSET(PT_ORIG_R2, pt_regs, orig_r2);
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OFFSET(PT_ORIG_R7, pt_regs, orig_r7);
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OFFSET(PT_R1, pt_regs, r1);
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OFFSET(PT_R2, pt_regs, r2);
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OFFSET(PT_R3, pt_regs, r3);
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OFFSET(PT_R4, pt_regs, r4);
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OFFSET(PT_R5, pt_regs, r5);
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OFFSET(PT_R6, pt_regs, r6);
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OFFSET(PT_R7, pt_regs, r7);
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OFFSET(PT_R8, pt_regs, r8);
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OFFSET(PT_R9, pt_regs, r9);
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OFFSET(PT_R10, pt_regs, r10);
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OFFSET(PT_R11, pt_regs, r11);
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OFFSET(PT_R12, pt_regs, r12);
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OFFSET(PT_R13, pt_regs, r13);
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OFFSET(PT_R14, pt_regs, r14);
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OFFSET(PT_R15, pt_regs, r15);
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OFFSET(PT_EA, pt_regs, ea);
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OFFSET(PT_RA, pt_regs, ra);
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OFFSET(PT_FP, pt_regs, fp);
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OFFSET(PT_SP, pt_regs, sp);
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OFFSET(PT_GP, pt_regs, gp);
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OFFSET(PT_ESTATUS, pt_regs, estatus);
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DEFINE(PT_REGS_SIZE, sizeof(struct pt_regs));
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BLANK();
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/* struct switch_stack */
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OFFSET(SW_R16, switch_stack, r16);
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OFFSET(SW_R17, switch_stack, r17);
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OFFSET(SW_R18, switch_stack, r18);
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OFFSET(SW_R19, switch_stack, r19);
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OFFSET(SW_R20, switch_stack, r20);
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OFFSET(SW_R21, switch_stack, r21);
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OFFSET(SW_R22, switch_stack, r22);
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OFFSET(SW_R23, switch_stack, r23);
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OFFSET(SW_FP, switch_stack, fp);
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OFFSET(SW_GP, switch_stack, gp);
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OFFSET(SW_RA, switch_stack, ra);
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DEFINE(SWITCH_STACK_SIZE, sizeof(struct switch_stack));
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BLANK();
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/* struct thread_info */
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OFFSET(TI_TASK, thread_info, task);
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OFFSET(TI_FLAGS, thread_info, flags);
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OFFSET(TI_PREEMPT_COUNT, thread_info, preempt_count);
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BLANK();
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return 0;
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}
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