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Alfred Gedeon 2020-07-01 22:55:52 -07:00 • committed by alfred gedeon
parent 718178c68a
commit 2c530ba5c3
125 changed files with 1218 additions and 1217 deletions
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18
portable/GCC/ARM_CM3/port.c
View file

@ -220,11 +220,11 @@ static void prvTaskExitError( void )
void vPortSVCHandler( void )
{
__asm volatile (
" ldr r3, pxCurrentTCBConst2 \n" /* Restore the context. */
" ldr r1, [r3] \n" /* Use pxCurrentTCBConst to get the pxCurrentTCB address. */
" ldr r0, [r1] \n" /* The first item in pxCurrentTCB is the task top of stack. */
" ldmia r0!, {r4-r11} \n" /* Pop the registers that are not automatically saved on exception entry and the critical nesting count. */
" msr psp, r0 \n" /* Restore the task stack pointer. */
" ldr r3, pxCurrentTCBConst2 \n"/* Restore the context. */
" ldr r1, [r3] \n"/* Use pxCurrentTCBConst to get the pxCurrentTCB address. */
" ldr r0, [r1] \n"/* The first item in pxCurrentTCB is the task top of stack. */
" ldmia r0!, {r4-r11} \n"/* Pop the registers that are not automatically saved on exception entry and the critical nesting count. */
" msr psp, r0 \n"/* Restore the task stack pointer. */
" isb \n"
" mov r0, #0 \n"
" msr basepri, r0 \n"
@ -240,15 +240,15 @@ void vPortSVCHandler( void )
static void prvPortStartFirstTask( void )
{
__asm volatile (
" ldr r0, =0xE000ED08 \n" /* Use the NVIC offset register to locate the stack. */
" ldr r0, =0xE000ED08 \n"/* Use the NVIC offset register to locate the stack. */
" ldr r0, [r0] \n"
" ldr r0, [r0] \n"
" msr msp, r0 \n" /* Set the msp back to the start of the stack. */
" cpsie i \n" /* Globally enable interrupts. */
" msr msp, r0 \n"/* Set the msp back to the start of the stack. */
" cpsie i \n"/* Globally enable interrupts. */
" cpsie f \n"
" dsb \n"
" isb \n"
" svc 0 \n" /* System call to start first task. */
" svc 0 \n"/* System call to start first task. */
" nop \n"
" .ltorg \n"
);

6
portable/GCC/ARM_CM3/portmacro.h
View file

@ -82,9 +82,9 @@
portNVIC_INT_CTRL_REG = portNVIC_PENDSVSET_BIT; \
\
/* Barriers are normally not required but do ensure the code is completely \
* within the specified behaviour for the architecture. */\
__asm volatile ( "dsb" ::: "memory" ); \
__asm volatile ( "isb" ); \
* within the specified behaviour for the architecture. */ \
__asm volatile ( "dsb" ::: "memory" ); \
__asm volatile ( "isb" ); \
}
#define portNVIC_INT_CTRL_REG ( *( ( volatile uint32_t * ) 0xe000ed04 ) )