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Update to include the option of saving/restoring the floating point context.

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This commit is contained in:
Richard Barry 2008-05-11 09:15:22 +00:00
parent 6177c6e4a4
commit 45fceb4bdd
4 changed files with 247 additions and 1 deletions
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67
Source/portable/GCC/PPC405_Xilinx/FPU_Macros.h Normal file
View file

@ -0,0 +1,67 @@
/*
FreeRTOS.org V5.0.0 - Copyright (C) 2003-2008 Richard Barry.
This file is part of the FreeRTOS.org distribution.
FreeRTOS.org is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
FreeRTOS.org is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with FreeRTOS.org; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
A special exception to the GPL can be applied should you wish to distribute
a combined work that includes FreeRTOS.org, without being obliged to provide
the source code for any proprietary components. See the licensing section
of http://www.FreeRTOS.org for full details of how and when the exception
can be applied.
***************************************************************************
***************************************************************************
* *
* SAVE TIME AND MONEY! We can port FreeRTOS.org to your own hardware, *
* and even write all or part of your application on your behalf. *
* See http://www.OpenRTOS.com for details of the services we provide to *
* expedite your project. *
* *
***************************************************************************
***************************************************************************
Please ensure to read the configuration and relevant port sections of the
online documentation.
http://www.FreeRTOS.org - Documentation, latest information, license and
contact details.
http://www.SafeRTOS.com - A version that is certified for use in safety
critical systems.
http://www.OpenRTOS.com - Commercial support, development, porting,
licensing and training services.
*/
/* When switching out a task, if the task tag contains a buffer address then
save the flop context into the buffer. */
#define traceTASK_SWITCHED_OUT() \
if( pxCurrentTCB->pxTaskTag != NULL ) \
{ \
extern void vPortSaveFPURegisters( void * ); \
vPortSaveFPURegisters( ( void * ) ( pxCurrentTCB->pxTaskTag ) ); \
}
/* When switching in a task, if the task tag contains a buffer address then
load the flop context from the buffer. */
#define traceTASK_SWITCHED_IN() \
if( pxCurrentTCB->pxTaskTag != NULL ) \
{ \
extern void vPortRestoreFPURegisters( void * ); \
vPortRestoreFPURegisters( ( void * ) ( pxCurrentTCB->pxTaskTag ) ); \
}

11
Source/portable/GCC/PPC405_Xilinx/port.c
View file

@ -67,7 +67,16 @@
#define portCRITICAL_INTERRUPT_ENABLE ( 1UL << 17UL )
#define portEXTERNAL_INTERRUPT_ENABLE ( 1UL << 15UL )
#define portMACHINE_CHECK_ENABLE ( 1UL << 12UL )
#define portINITIAL_MSR ( portCRITICAL_INTERRUPT_ENABLE | portEXTERNAL_INTERRUPT_ENABLE | portMACHINE_CHECK_ENABLE )
#if configUSE_FPU == 1
#define portAPU_PRESENT ( 1UL << 25UL )
#define portFCM_FPU_PRESENT ( 1UL << 13UL )
#else
#define portAPU_PRESENT ( 0UL )
#define portFCM_FPU_PRESENT ( 0UL )
#endif
#define portINITIAL_MSR ( portCRITICAL_INTERRUPT_ENABLE | portEXTERNAL_INTERRUPT_ENABLE | portMACHINE_CHECK_ENABLE | portAPU_PRESENT | portFCM_FPU_PRESENT )
/*-----------------------------------------------------------*/

166
Source/portable/GCC/PPC405_Xilinx/portasm.S
View file

@ -1,3 +1,52 @@
/*
FreeRTOS.org V5.0.0 - Copyright (C) 2003-2008 Richard Barry.
This file is part of the FreeRTOS.org distribution.
FreeRTOS.org is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
FreeRTOS.org is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with FreeRTOS.org; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
A special exception to the GPL can be applied should you wish to distribute
a combined work that includes FreeRTOS.org, without being obliged to provide
the source code for any proprietary components. See the licensing section
of http://www.FreeRTOS.org for full details of how and when the exception
can be applied.
***************************************************************************
***************************************************************************
* *
* SAVE TIME AND MONEY! We can port FreeRTOS.org to your own hardware, *
* and even write all or part of your application on your behalf. *
* See http://www.OpenRTOS.com for details of the services we provide to *
* expedite your project. *
* *
***************************************************************************
***************************************************************************
Please ensure to read the configuration and relevant port sections of the
online documentation.
http://www.FreeRTOS.org - Documentation, latest information, license and
contact details.
http://www.SafeRTOS.com - A version that is certified for use in safety
critical systems.
http://www.OpenRTOS.com - Commercial support, development, porting,
licensing and training services.
*/
#include "FreeRTOSConfig.h"
.extern pxCurrentTCB
@ -9,6 +58,8 @@
.global vPortYield
.global vPortTickISR
.global vPortISRWrapper
.global vPortSaveFPURegisters
.global vPortRestoreFPURegisters
.set BChainField, 0
.set NextLRField, BChainField + 4
@ -146,3 +197,118 @@ vPortISRWrapper:
bl vPortISRHandler
portRESTORE_STACK_POINTER_AND_LR
blr
#if configUSE_FPU == 1
vPortSaveFPURegisters:
/* Enable APU and mark FPU as present. */
mfmsr r0
xor r30, r30, r30
oris r30, r30, 512
ori r30, r30, 8192
or r0, r0, r30
mtmsr r0
/* Buffer address is in r3. Save each flop register into an offset from
this buffer address. */
stfs f0, 0(r3)
stfs f1, 4(r3)
stfs f2, 8(r3)
stfs f3, 12(r3)
stfs f4, 16(r3)
stfs f5, 20(r3)
stfs f6, 24(r3)
stfs f7, 28(r3)
stfs f8, 32(r3)
stfs f9, 36(r3)
stfs f10, 40(r3)
stfs f11, 44(r3)
stfs f12, 48(r3)
stfs f13, 52(r3)
stfs f14, 56(r3)
stfs f15, 60(r3)
stfs f16, 64(r3)
stfs f17, 68(r3)
stfs f18, 72(r3)
stfs f19, 76(r3)
stfs f20, 80(r3)
stfs f21, 84(r3)
stfs f22, 88(r3)
stfs f23, 92(r3)
stfs f24, 96(r3)
stfs f25, 100(r3)
stfs f26, 104(r3)
stfs f27, 108(r3)
stfs f28, 112(r3)
stfs f29, 116(r3)
stfs f30, 120(r3)
stfs f31, 124(r3)
/* Also save the FPSCR. */
mffs f31
stfs f31, 128(r3)
blr
#endif /* configUSE_FPU. */
#if configUSE_FPU == 1
vPortRestoreFPURegisters:
/* Enable APU and mark FPU as present. */
mfmsr r0
xor r30, r30, r30
oris r30, r30, 512
ori r30, r30, 8192
or r0, r0, r30
mtmsr r0
/* Buffer address is in r3. Restore each flop register from an offset
into this buffer.
First the FPSCR. */
lfs f31, 128(r3)
mtfsf f31, 7
lfs f0, 0(r3)
lfs f1, 4(r3)
lfs f2, 8(r3)
lfs f3, 12(r3)
lfs f4, 16(r3)
lfs f5, 20(r3)
lfs f6, 24(r3)
lfs f7, 28(r3)
lfs f8, 32(r3)
lfs f9, 36(r3)
lfs f10, 40(r3)
lfs f11, 44(r3)
lfs f12, 48(r3)
lfs f13, 52(r3)
lfs f14, 56(r3)
lfs f15, 60(r3)
lfs f16, 64(r3)
lfs f17, 68(r3)
lfs f18, 72(r3)
lfs f19, 76(r3)
lfs f20, 80(r3)
lfs f21, 84(r3)
lfs f22, 88(r3)
lfs f23, 92(r3)
lfs f24, 96(r3)
lfs f25, 100(r3)
lfs f26, 104(r3)
lfs f27, 108(r3)
lfs f28, 112(r3)
lfs f29, 116(r3)
lfs f30, 120(r3)
lfs f31, 124(r3)
blr
#endif /* configUSE_FPU. */

4
Source/portable/GCC/PPC405_Xilinx/portmacro.h
View file

@ -114,6 +114,10 @@ void vPortYield( void );
#define portSTACK_GROWTH ( -1 )
#define portTICK_RATE_MS ( ( portTickType ) 1000 / configTICK_RATE_HZ )
#define portNOP() asm volatile ( "NOP" )
/* There are 32 * 32bit floating point regieters, plus the FPSCR to save. */
#define portNO_FLOP_REGISTERS_TO_SAVE ( 32 + 1 )
/*-----------------------------------------------------------*/
/* Task function macros as described on the FreeRTOS.org WEB site. */