Beginning of context switch logic
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3012 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo
parent
d81f6e8e32
commit
b8f63cb1c0
@ -51,11 +51,46 @@
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* Definitions
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****************************************************************************/
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/* Register state save array indices */
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/* Register state save array indices.
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*
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* The following registers are saved by the AVR32 hardware (for the case of
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* interrupts only). Note the registers are order in the opposite order the
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* they appear in memory (i.e., in the order of increasing address) because
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* this makes it easier to following the ordering of pushing on a push-down
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* stack.
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*/
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#define REG_R8 16
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#define REG_R9 15
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#define REG_R10 14
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#define REG_R11 13
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#define REG_R12 12
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#define REG_R14 11
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#define REG_R15 10
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#define REG_SR 9
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/* Size of the register state save array */
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#define REG_LR REG_R14
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#define REG_PC REG_R15
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/* Additional registers saved in order have the full CPU context */
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#define REG_R13 8
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#define REG_SP REG_R13
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#define REG_R0 7
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#define REG_R1 6
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#define REG_R2 5
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#define REG_R3 4
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#define REG_R4 3
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#define REG_R5 2
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#define REG_R6 1
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#define REG_R7 0
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/* Size of the register state save array (in 32-bit words) */
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#define INTCONTEXT_REGS 8 /* r8-r12, lr, pc, sr */
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#define XCPTCONTEXT_REGS 17 /* Plus r0-r7, sp */
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#define XCPTCONTEXT_REGS 1
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/****************************************************************************
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* Public Types
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@ -39,14 +39,14 @@ HEAD_ASRC = up_nommuhead.S
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# Common AVR/AVR32 files
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CMN_ASRCS = up_exceptions.S
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CMN_ASRCS = up_exceptions.S up_fullcontextrestore.S
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CMN_CSRCS = up_assert.c up_allocateheap.c up_blocktask.c up_copystate.c \
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up_createstack.c up_mdelay.c up_udelay.c up_exit.c up_idle.c \
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up_initialize.c up_initialstate.c up_interruptcontext.c \
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up_modifyreg8.c up_modifyreg16.c up_modifyreg32.c \
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up_releasepending.c up_releasestack.c up_reprioritizertr.c \
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up_schedulesigaction.c up_sigdeliver.c up_unblocktask.c \
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up_usestack.c up_doirq.c
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up_usestack.c up_doirq.c
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# Required AT91UC3 files
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74
arch/avr/src/at91uc3/at91uc3_adc.h
Executable file
74
arch/avr/src/at91uc3/at91uc3_adc.h
Executable file
@ -0,0 +1,74 @@
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/************************************************************************************
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* arch/avr/src/at91uc3/at91uc3_adc.h
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*
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* Copyright (C) 2010 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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||||
* notice, this list of conditions and the following disclaimer in
|
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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||||
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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************************************************************************************/
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#ifndef __ARCH_AVR_SRC_AT91UC3_AT91UC3_ADC_H
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#define __ARCH_AVR_SRC_AT91UC3_AT91UC3_ADC_H
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/************************************************************************************
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* Included Files
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************************************************************************************/
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#include <nuttx/config.h>
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/************************************************************************************
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* Pre-processor Definitions
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************************************************************************************/
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/* Register offsets *****************************************************************/
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#warning "Missing Logic"
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/* Register Addresses ***************************************************************/
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#warning "Missing Logic"
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/* Register Bit-field Definitions ***************************************************/
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#warning "Missing Logic"
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/************************************************************************************
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* Public Types
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************************************************************************************/
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/************************************************************************************
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* Public Data
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************************************************************************************/
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/************************************************************************************
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* Public Functions
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************************************************************************************/
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#endif /* __ARCH_AVR_SRC_AT91UC3_AT91UC3_ADC_H */
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74
arch/avr/src/at91uc3/at91uc3_pwm.h
Executable file
74
arch/avr/src/at91uc3/at91uc3_pwm.h
Executable file
@ -0,0 +1,74 @@
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/************************************************************************************
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* arch/avr/src/at91uc3/at91uc3_pwm.h
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*
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* Copyright (C) 2010 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
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||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in
|
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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************************************************************************************/
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#ifndef __ARCH_AVR_SRC_AT91UC3_AT91UC3_PWM_H
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#define __ARCH_AVR_SRC_AT91UC3_AT91UC3_PWM_H
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/************************************************************************************
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* Included Files
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************************************************************************************/
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#include <nuttx/config.h>
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/************************************************************************************
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* Pre-processor Definitions
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************************************************************************************/
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/* Register offsets *****************************************************************/
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#warning "Missing Logic"
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/* Register Addresses ***************************************************************/
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#warning "Missing Logic"
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/* Register Bit-field Definitions ***************************************************/
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#warning "Missing Logic"
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/************************************************************************************
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* Public Types
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************************************************************************************/
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/************************************************************************************
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* Public Data
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************************************************************************************/
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/************************************************************************************
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* Public Functions
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************************************************************************************/
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#endif /* __ARCH_AVR_SRC_AT91UC3_AT91UC3_PWM_H */
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74
arch/avr/src/at91uc3/at91uc3_ssc.h
Executable file
74
arch/avr/src/at91uc3/at91uc3_ssc.h
Executable file
@ -0,0 +1,74 @@
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/************************************************************************************
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* arch/avr/src/at91uc3/at91uc3_ssc.h
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*
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* Copyright (C) 2010 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
*
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||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in
|
||||
* the documentation and/or other materials provided with the
|
||||
* distribution.
|
||||
* 3. Neither the name NuttX nor the names of its contributors may be
|
||||
* used to endorse or promote products derived from this software
|
||||
* without specific prior written permission.
|
||||
*
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||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||||
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
||||
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
||||
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
||||
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
||||
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
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* POSSIBILITY OF SUCH DAMAGE.
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*
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************************************************************************************/
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#ifndef __ARCH_AVR_SRC_AT91UC3_AT91UC3_SSC_H
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#define __ARCH_AVR_SRC_AT91UC3_AT91UC3_SSC_H
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/************************************************************************************
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* Included Files
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************************************************************************************/
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#include <nuttx/config.h>
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/************************************************************************************
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* Pre-processor Definitions
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************************************************************************************/
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/* Register offsets *****************************************************************/
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#warning "Missing logic"
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/* Register Addresses ***************************************************************/
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#warning "Missing logic"
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/* Register Bit-field Definitions ***************************************************/
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#warning "Missing logic"
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/************************************************************************************
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* Public Types
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************************************************************************************/
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/************************************************************************************
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* Public Data
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************************************************************************************/
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/************************************************************************************
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* Public Functions
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************************************************************************************/
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#endif /* __ARCH_AVR_SRC_AT91UC3_AT91UC3_SSC_H */
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74
arch/avr/src/at91uc3/at91uc3_tc.h
Executable file
74
arch/avr/src/at91uc3/at91uc3_tc.h
Executable file
@ -0,0 +1,74 @@
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/************************************************************************************
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* arch/avr/src/at91uc3/at91uc3_tc.h
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*
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* Copyright (C) 2010 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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*
|
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* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
*
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in
|
||||
* the documentation and/or other materials provided with the
|
||||
* distribution.
|
||||
* 3. Neither the name NuttX nor the names of its contributors may be
|
||||
* used to endorse or promote products derived from this software
|
||||
* without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||||
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
||||
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
||||
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
||||
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
||||
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
||||
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
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************************************************************************************/
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#ifndef __ARCH_AVR_SRC_AT91UC3_AT91UC3_TC_H
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#define __ARCH_AVR_SRC_AT91UC3_AT91UC3_TC_H
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/************************************************************************************
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* Included Files
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************************************************************************************/
|
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|
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#include <nuttx/config.h>
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|
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/************************************************************************************
|
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* Pre-processor Definitions
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************************************************************************************/
|
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|
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/* Register offsets *****************************************************************/
|
||||
|
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#warning "Missing Logic"
|
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|
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/* Register Addresses ***************************************************************/
|
||||
|
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#warning "Missing Logic"
|
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|
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/* Register Bit-field Definitions ***************************************************/
|
||||
|
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#warning "Missing Logic"
|
||||
|
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/************************************************************************************
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* Public Types
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************************************************************************************/
|
||||
|
||||
/************************************************************************************
|
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* Public Data
|
||||
************************************************************************************/
|
||||
|
||||
/************************************************************************************
|
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* Public Functions
|
||||
************************************************************************************/
|
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#endif /* __ARCH_AVR_SRC_AT91UC3_AT91UC3_TC_H */
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74
arch/avr/src/at91uc3/at91uc3_usbb.h
Executable file
74
arch/avr/src/at91uc3/at91uc3_usbb.h
Executable file
@ -0,0 +1,74 @@
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/************************************************************************************
|
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* arch/avr/src/at91uc3/at91uc3_usbb.h
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*
|
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* Copyright (C) 2010 Gregory Nutt. All rights reserved.
|
||||
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
*
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in
|
||||
* the documentation and/or other materials provided with the
|
||||
* distribution.
|
||||
* 3. Neither the name NuttX nor the names of its contributors may be
|
||||
* used to endorse or promote products derived from this software
|
||||
* without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||||
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
||||
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
||||
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
||||
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
||||
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
||||
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
************************************************************************************/
|
||||
|
||||
#ifndef __ARCH_AVR_SRC_AT91UC3_AT91UC3_USBB_H
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#define __ARCH_AVR_SRC_AT91UC3_AT91UC3_USBB_H
|
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|
||||
/************************************************************************************
|
||||
* Included Files
|
||||
************************************************************************************/
|
||||
|
||||
#include <nuttx/config.h>
|
||||
|
||||
/************************************************************************************
|
||||
* Pre-processor Definitions
|
||||
************************************************************************************/
|
||||
|
||||
/* Register offsets *****************************************************************/
|
||||
|
||||
#warning "Missing Logic"
|
||||
|
||||
/* Register Addresses ***************************************************************/
|
||||
|
||||
#warning "Missing Logic"
|
||||
|
||||
/* Register Bit-field Definitions ***************************************************/
|
||||
|
||||
#warning "Missing Logic"
|
||||
|
||||
/************************************************************************************
|
||||
* Public Types
|
||||
************************************************************************************/
|
||||
|
||||
/************************************************************************************
|
||||
* Public Data
|
||||
************************************************************************************/
|
||||
|
||||
/************************************************************************************
|
||||
* Public Functions
|
||||
************************************************************************************/
|
||||
|
||||
#endif /* __ARCH_AVR_SRC_AT91UC3_AT91UC3_USBB_H */
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@ -40,9 +40,6 @@
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#include <nuttx/config.h>
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#include <arch/avr32/avr32.h>
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#include "up_internal.h"
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#include "up_arch.h"
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/****************************************************************************
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* External Symbols
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****************************************************************************/
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@ -209,18 +206,52 @@ avr32_excptcommon:
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* Common Event Handling Logic
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****************************************************************************/
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/* After this point, logic to manage interrupts and exceptions is equivalent.
|
||||
* Here we have:
|
||||
*
|
||||
* R8-R12, LR, SR, and the PC on the stack.
|
||||
* R12 holds the IRQ number to be dispatched.
|
||||
*
|
||||
* This function will finish construction of the register save structure and
|
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* call the IRQ dispatching logic.
|
||||
*/
|
||||
/* After this point, logic to manage interrupts and exceptions is */
|
||||
/* equivalent. Here we have: */
|
||||
/* */
|
||||
/* R8-R12, LR, SR, and the PC on the stack. */
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/* R12 holds the IRQ number to be dispatched. */
|
||||
/* */
|
||||
/* The context save area looks like this: */
|
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/* xx xx xx xx xx xx xx xx xx SR PC LR 12 11 10 09 08 */
|
||||
/* ^ +8*4 */
|
||||
/* This function will finish construction of the register save structure */
|
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/* and call the IRQ dispatching logic. */
|
||||
|
||||
avr32_common:
|
||||
/* Save the SP (as it was before the interrupt) in the conext save */
|
||||
/* structure. */
|
||||
/* xx xx xx xx xx xx xx xx SP SR PC LR 12 11 10 09 08 */
|
||||
/* ^sp */
|
||||
|
||||
mov r8, sp
|
||||
sub r8, -8*4
|
||||
st.w --sp, r8
|
||||
|
||||
/* Saving R0-R7 is all that is left to complete the context save. */
|
||||
/* 07 06 05 04 03 02 01 00 SP SR PC LR 12 11 10 09 08 */
|
||||
/* ^sp */
|
||||
|
||||
stm --sp, r0-r7
|
||||
|
||||
/* Now call up_doirq passing the IRQ number in r12 and the base address */
|
||||
/* of the register context save area in r13. */
|
||||
|
||||
mov r12, sp
|
||||
mcall .Lup_doirq
|
||||
|
||||
#warning "Missing Logic"
|
||||
rjmp $
|
||||
|
||||
/* On return, r12 will hold the new address of the register context save
|
||||
* area. On an interrupt contex switch, this will (1) not be the same
|
||||
* as the value of r12 passed to up_doirq(), and (2) may not reside on
|
||||
* a stack.
|
||||
*/
|
||||
|
||||
#warning "Missing Logic"
|
||||
|
||||
.Lup_doirq:
|
||||
.word up_doirq
|
||||
.end
|
||||
|
||||
|
||||
113
arch/avr/src/avr32/up_fullcontextrestore.S
Executable file
113
arch/avr/src/avr32/up_fullcontextrestore.S
Executable file
@ -0,0 +1,113 @@
|
||||
/****************************************************************************
|
||||
* arch/avr32/src/avr32/up_fullcontextrestore.S
|
||||
*
|
||||
* Copyright (C) 2010 Gregory Nutt. All rights reserved.
|
||||
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
*
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in
|
||||
* the documentation and/or other materials provided with the
|
||||
* distribution.
|
||||
* 3. Neither the name NuttX nor the names of its contributors may be
|
||||
* used to endorse or promote products derived from this software
|
||||
* without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||||
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
||||
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
||||
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
||||
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
||||
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
||||
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Included Files
|
||||
****************************************************************************/
|
||||
|
||||
#include <nuttx/config.h>
|
||||
#include <arch/avr32/avr32.h>
|
||||
|
||||
/****************************************************************************
|
||||
* External Symbols
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Macros
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Name: up_fullcontextrestore
|
||||
*
|
||||
* C Prototype:
|
||||
* void up_fullcontextrestore(uint32_t *regs);
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
.text
|
||||
.global up_fullcontextrestore
|
||||
.type up_fullcontextrestore, @function
|
||||
up_fullcontextrestore:
|
||||
|
||||
/* Initially, r12 points to the r7 save area. Restore r0-r7. */
|
||||
/* 07 06 05 04 03 02 01 00 xx xx xx xx xx xx xx xx xx */
|
||||
/* ^r12 */
|
||||
|
||||
ldm r12++, r0-r7
|
||||
|
||||
/* Now, r12 points to the SP (r13) save area. Recover the value of */
|
||||
/* the stack pointer (r13). We will need to save some temporaries on */
|
||||
/* the final stack. */
|
||||
/* 07 06 05 04 03 02 01 00 SP xx xx xx xx xx xx xx xx */
|
||||
/* ^r12 */
|
||||
|
||||
ld.w sp, r12++
|
||||
|
||||
/* Now r12 points to the SR save area. Skip over the SR for now. */
|
||||
/* 07 06 05 04 03 02 01 00 SP xx xx xx xx xx xx xx xx */
|
||||
/* ^r12 */
|
||||
|
||||
sub r12, -2*4
|
||||
|
||||
/* Get the pc, lr, and r12 (in r8, r9, and r10) and move them to the */
|
||||
/* stack. We can now use r12 and lr as scratch registers. */
|
||||
/* 07 06 05 04 03 02 01 00 SP xx PC LR 12 xx xx xx xx */
|
||||
/* ^r12 */
|
||||
|
||||
ldm r12++, r8-r10
|
||||
stm --sp, r8-r10
|
||||
|
||||
/* Now r12 now points to the r11 save area. Restore r8-r11. */
|
||||
/* 07 06 05 04 03 02 01 00 SP xx PC LR 12 11 10 09 08 */
|
||||
/* ^r12 */
|
||||
|
||||
ldm r12++, r8-r11
|
||||
|
||||
/* r12 now points +4 beyond the end of the register save area. Restore */
|
||||
/* SR. */
|
||||
/* 07 06 05 04 03 02 01 00 SP SR PC LR 12 11 10 09 08 */
|
||||
/* ^r12-4*8 ^r12 */
|
||||
|
||||
ld.w lr, r12[-4*8]
|
||||
mtsr AVR32_SR, lr
|
||||
|
||||
/* Restore PC, LR and r12. Hmmm.. I need to study the behaviour of ldm */
|
||||
/* when r12,lr, and pc on in ldm reglist16. I'm not sure that I want */
|
||||
/* that behavior. */
|
||||
|
||||
/* ldm sp++, r12, lr, pc */
|
||||
ldm sp++, r12, lr
|
||||
ld.w pc, sp++
|
||||
.end
|
||||
Loading…
Reference in New Issue
Block a user