len0rd/FreeRTOS-Kernel
1
0
Fork 0
mirror of https://github.com/FreeRTOS/FreeRTOS-Kernel.git synced 2025-08-19 09:38:32 -04:00
Code Issues Projects Releases Packages Wiki Activity

A little optimisation.

Browse source
This commit is contained in:
Richard Barry 2008-05-23 15:16:25 +00:00
parent b6aa1d6ca8
commit f689c709ab
3 changed files with 19 additions and 26 deletions
Download patch file Download diff file Expand all files Collapse all files

16
Source/portable/MPLAB/PIC32MX/port_asm.S
View file

@ -51,7 +51,6 @@
#include <sys/asm.h>
#include "ISR_Support.h"
#define portEXC_CODE_MASK ( 0x1f << 2 )
.set nomips16
.set noreorder
@ -138,10 +137,9 @@ vPortYieldISR:
la sp, xISRStackTop
lw sp, (sp)
/* Increment and save the nesting count in case this gets preempted. */
/* Set the nesting count. */
la k0, uxInterruptNesting
lw s6, (k0)
addiu s6, s6, 1
addiu s6, zero, 1
sw s6, 0(k0)
/* s6 holds the EPC value, this is saved with the rest of the context
@ -261,11 +259,10 @@ vPortYieldISR:
/* Protect access to the k registers, and others. */
di
/* Decrement the nesting count. */
/* Set nesting back to zero. As the lowest priority interrupt this
interrupt cannot have nested. */
la k0, uxInterruptNesting
lw k1, (k0)
addiu k1, k1, -1
sw k1, 0(k0)
sw zero, 0(k0)
/* Switch back to use the real stack pointer. */
add sp, zero, s5
@ -273,8 +270,7 @@ vPortYieldISR:
/* Restore the real s5 value. */
lw s5, 40(sp)
/* If the critical nesting is not zero and a yield is not pended
then set status as if within a critical section. */
/* Pop the status and epc values. */
lw k1, portSTATUS_STACK_LOCATION(sp)
lw k0, portEPC_STACK_LOCATION(sp)