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Add an cpsie i before the SVC call that starts the scheduler. This is just in case the C start up code leaves interrupts globally disabled.

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This commit is contained in:
Richard Barry 2010-12-23 10:39:02 +00:00
parent 6046eea342
commit a67c624894
3 changed files with 8 additions and 10 deletions
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2
Source/portable/GCC/ARM_CM3/port.c
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@ -155,7 +155,9 @@ void vPortStartFirstTask( void )
" ldr r0, [r0] \n" " ldr r0, [r0] \n"
" ldr r0, [r0] \n" " ldr r0, [r0] \n"
" msr msp, r0 \n" /* Set the msp back to the start of the stack. */ " msr msp, r0 \n" /* Set the msp back to the start of the stack. */
" cpsie i \n"
" svc 0 \n" /* System call to start first task. */ " svc 0 \n" /* System call to start first task. */
" nop \n"
); );
} }
/*-----------------------------------------------------------*/ /*-----------------------------------------------------------*/

14
Source/portable/IAR/ARM_CM3/portasm.s
View file

@ -33,9 +33,9 @@
FreeRTOS is distributed in the hope that it will be useful, but WITHOUT FreeRTOS is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 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 more details. You should have received a copy of the GNU General Public
License and the FreeRTOS license exception along with FreeRTOS; if not it License and the FreeRTOS license exception along with FreeRTOS; if not it
can be viewed here: http://www.freertos.org/a00114.html and also obtained can be viewed here: http://www.freertos.org/a00114.html and also obtained
by writing to Richard Barry, contact details for whom are available on the by writing to Richard Barry, contact details for whom are available on the
FreeRTOS WEB site. FreeRTOS WEB site.
@ -51,13 +51,6 @@
licensing and training services. licensing and training services.
*/ */
/*
Change from V4.2.1:
+ Introduced usage of configKERNEL_INTERRUPT_PRIORITY macro to set the
interrupt priority used by the kernel.
*/
#include <FreeRTOSConfig.h> #include <FreeRTOSConfig.h>
/* For backward compatibility, ensure configKERNEL_INTERRUPT_PRIORITY is /* For backward compatibility, ensure configKERNEL_INTERRUPT_PRIORITY is
@ -157,6 +150,7 @@ vPortStartFirstTask
/* Set the msp back to the start of the stack. */ /* Set the msp back to the start of the stack. */
msr msp, r0 msr msp, r0
/* Call SVC to start the first task. */ /* Call SVC to start the first task. */
cpsie i
svc 0 svc 0
END END

2
Source/portable/RVDS/ARM_CM3/port.c
View file

@ -149,7 +149,9 @@ __asm void vPortStartFirstTask( void )
/* Set the msp back to the start of the stack. */ /* Set the msp back to the start of the stack. */
msr msp, r0 msr msp, r0
/* Call SVC to start the first task. */ /* Call SVC to start the first task. */
cpsie i
svc 0 svc 0
nop
} }
/*-----------------------------------------------------------*/ /*-----------------------------------------------------------*/