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2010-04-20 Allan Hessenflow <allanh@kallisti.com>

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* cpu_asm.S: L0-L3 were part of the interrupt context, but as
	Mike Frysinger noted they were not being zeroed before calling
	the C handlers. A patch that corrects this, as well as improving
	some of the push/pop order to avoid stalls.
This commit is contained in:
Joel Sherrill
2010-04-20 13:27:48 +00:00
parent 25ddacd4f3
commit 32eadeb250
2 changed files with 26 additions and 9 deletions
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7
cpukit/score/cpu/bfin/ChangeLog
View File

@@ -1,3 +1,10 @@
2010-04-20 Allan Hessenflow <allanh@kallisti.com>
* cpu_asm.S: L0-L3 were part of the interrupt context, but as
Mike Frysinger noted they were not being zeroed before calling
the C handlers. A patch that corrects this, as well as improving
some of the push/pop order to avoid stalls.
2010-04-17 Allan Hessenflow <allanh@kallisti.com>
* cpu.c, cpu_asm.S, rtems/score/cpu.h: Fine tune registers saved in the

28
cpukit/score/cpu/bfin/cpu_asm.S
View File

@@ -383,10 +383,10 @@ vectorIDLoop:
[--sp] = r3;
[--sp] = p3;
[--sp] = p2;
[--sp] = lt1;
[--sp] = lt0;
[--sp] = lc1;
[--sp] = lc0;
[--sp] = lt1;
[--sp] = lt0;
[--sp] = lb1;
[--sp] = lb0;
[--sp] = i3;
@@ -406,8 +406,13 @@ vectorIDLoop:
[--sp] = b1;
[--sp] = b0;
[--sp] = rets;
r1 = fp; /* is this really what should be passed here? */
/* call user isr; r0 = vector number, r1 = frame pointer */
r1 = fp; /* is this really what should be passed here? */
r2 = 0;
l0 = r2;
l1 = r2;
l2 = r2;
l3 = r2;
sp += -12; /* bizarre abi... */
call (p0);
sp += 12;
@@ -430,10 +435,10 @@ vectorIDLoop:
i3 = [sp++];
lb0 = [sp++];
lb1 = [sp++];
lc0 = [sp++];
lc1 = [sp++];
lt0 = [sp++];
lt1 = [sp++];
lc0 = [sp++];
lc1 = [sp++];
p2 = [sp++];
p3 = [sp++];
r3 = [sp++];
@@ -515,10 +520,10 @@ __ISR15_Handler:
[--sp] = p2;
[--sp] = p1;
[--sp] = p0;
[--sp] = lt1;
[--sp] = lt0;
[--sp] = lc1;
[--sp] = lc0;
[--sp] = lt1;
[--sp] = lt0;
[--sp] = lb1;
[--sp] = lb0;
[--sp] = i3;
@@ -537,6 +542,11 @@ __ISR15_Handler:
[--sp] = b2;
[--sp] = b1;
[--sp] = b0;
r2 = 0;
l0 = r2;
l1 = r2;
l2 = r2;
l3 = r2;
sp += -12; /* bizarre abi... */
call __Thread_Dispatch;
sp += 12;
@@ -558,10 +568,10 @@ __ISR15_Handler:
i3 = [sp++];
lb0 = [sp++];
lb1 = [sp++];
lc0 = [sp++];
lc1 = [sp++];
lt0 = [sp++];
lt1 = [sp++];
lc0 = [sp++];
lc1 = [sp++];
p0 = [sp++];
p1 = [sp++];
p2 = [sp++];