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authorPaul Mackerras <paulus@samba.org>2007-08-28 15:56:11 +1000
committerPaul Mackerras <paulus@samba.org>2007-08-28 15:56:11 +1000
commit35438c4327df18dbf5e7f597b69299119f4a14de (patch)
treea4589d731015db93f2eba8f84ffb1f48a8084020 /arch/powerpc/platforms/cell/pervasive.c
parent2f6c9d961081dc7b109eb19166244bcb2a5dfc28 (diff)
parentb07d68b5ca4d55a16fab223d63d5fb36f89ff42f (diff)
downloadblackbird-op-linux-35438c4327df18dbf5e7f597b69299119f4a14de.tar.gz
blackbird-op-linux-35438c4327df18dbf5e7f597b69299119f4a14de.zip
Merge branch 'linux-2.6' into for-2.6.24
Diffstat (limited to 'arch/powerpc/platforms/cell/pervasive.c')
-rw-r--r--arch/powerpc/platforms/cell/pervasive.c26
1 files changed, 26 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/cell/pervasive.c b/arch/powerpc/platforms/cell/pervasive.c
index 812bf563ed65..4ede22d363fa 100644
--- a/arch/powerpc/platforms/cell/pervasive.c
+++ b/arch/powerpc/platforms/cell/pervasive.c
@@ -38,6 +38,8 @@
#include "pervasive.h"
#include "cbe_regs.h"
+static int sysreset_hack;
+
static void cbe_power_save(void)
{
unsigned long ctrl, thread_switch_control;
@@ -85,6 +87,9 @@ static void cbe_power_save(void)
static int cbe_system_reset_exception(struct pt_regs *regs)
{
+ int cpu;
+ struct cbe_pmd_regs __iomem *pmd;
+
switch (regs->msr & SRR1_WAKEMASK) {
case SRR1_WAKEEE:
do_IRQ(regs);
@@ -93,6 +98,18 @@ static int cbe_system_reset_exception(struct pt_regs *regs)
timer_interrupt(regs);
break;
case SRR1_WAKEMT:
+ /*
+ * The BMC can inject user triggered system reset exceptions,
+ * but cannot set the system reset reason in srr1,
+ * so check an extra register here.
+ */
+ if (sysreset_hack && (cpu = smp_processor_id()) == 0) {
+ pmd = cbe_get_cpu_pmd_regs(cpu);
+ if (in_be64(&pmd->ras_esc_0) & 0xffff) {
+ out_be64(&pmd->ras_esc_0, 0);
+ return 0;
+ }
+ }
break;
#ifdef CONFIG_CBE_RAS
case SRR1_WAKESYSERR:
@@ -113,9 +130,12 @@ static int cbe_system_reset_exception(struct pt_regs *regs)
void __init cbe_pervasive_init(void)
{
int cpu;
+
if (!cpu_has_feature(CPU_FTR_PAUSE_ZERO))
return;
+ sysreset_hack = machine_is_compatible("IBM,CBPLUS-1.0");
+
for_each_possible_cpu(cpu) {
struct cbe_pmd_regs __iomem *regs = cbe_get_cpu_pmd_regs(cpu);
if (!regs)
@@ -124,6 +144,12 @@ void __init cbe_pervasive_init(void)
/* Enable Pause(0) control bit */
out_be64(&regs->pmcr, in_be64(&regs->pmcr) |
CBE_PMD_PAUSE_ZERO_CONTROL);
+
+ /* Enable JTAG system-reset hack */
+ if (sysreset_hack)
+ out_be32(&regs->fir_mode_reg,
+ in_be32(&regs->fir_mode_reg) |
+ CBE_PMD_FIR_MODE_M8);
}
ppc_md.power_save = cbe_power_save;
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