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| author | gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2008-03-17 15:43:03 +0000 |
|---|---|---|
| committer | gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2008-03-17 15:43:03 +0000 |
| commit | 24359085b9ed5368480ef7a21af26b83879a351e (patch) | |
| tree | 5c3d42da348e347d3dec797ae70559a29222fac5 /ports/ARMCM3 | |
| parent | 8ce99ed1fb2863a7609339bf9a1d42f09be11a1a (diff) | |
| download | ChibiOS-24359085b9ed5368480ef7a21af26b83879a351e.tar.gz ChibiOS-24359085b9ed5368480ef7a21af26b83879a351e.tar.bz2 ChibiOS-24359085b9ed5368480ef7a21af26b83879a351e.zip | |
git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@239 35acf78f-673a-0410-8e92-d51de3d6d3f4
Diffstat (limited to 'ports/ARMCM3')
| -rw-r--r-- | ports/ARMCM3/chcore.c | 20 | ||||
| -rw-r--r-- | ports/ARMCM3/chcore.h | 5 |
2 files changed, 23 insertions, 2 deletions
diff --git a/ports/ARMCM3/chcore.c b/ports/ARMCM3/chcore.c index a98da808b..7ef8f8daf 100644 --- a/ports/ARMCM3/chcore.c +++ b/ports/ARMCM3/chcore.c @@ -66,5 +66,25 @@ void threadstart(void) { asm volatile ("mov r0, r5 \n\t" \
"blx r4 \n\t" \
"bl chThdExit ");
+}
+
+void *retaddr;
+
+__attribute__((naked, weak))
+void threadswitch(void) {
+
+ asm volatile ("sub sp, sp, #4 \n\t" \
+ "push {r0-r3, r12, lr} \n\t" \
+ "mrs r0, XPSR \n\t" \
+ "push {r0} \n\t" \
+ "ldr r0, =retaddr \n\t" \
+ "str r0, [sp, #28] ");
+
+ chSchDoRescheduleI();
+ asm volatile ("pop {r0} \n\t" \
+ "msr XPSR, r0 \n\t" \
+ "pop {r0-r3, r12, lr} \n\t" \
+ "cpsie i \n\t" \
+ "pop {pc} ");
}
diff --git a/ports/ARMCM3/chcore.h b/ports/ARMCM3/chcore.h index 706f49c28..9fee0c61d 100644 --- a/ports/ARMCM3/chcore.h +++ b/ports/ARMCM3/chcore.h @@ -26,13 +26,14 @@ typedef void *regarm; * Interrupt saved context.
*/
struct extctx {
- regarm spsr_irq;
- regarm lr_irq;
+ regarm pc;
+ regarm xpsr;
regarm r0;
regarm r1;
regarm r2;
regarm r3;
regarm r12;
+ regarm lr;
};
/*
|