From 70694a8bab22bd0cc98ff4ee5cc75fe9be30fcd0 Mon Sep 17 00:00:00 2001
From: Christian Krafft <krafft@de.ibm.com>
Date: Wed, 16 Jul 2008 05:51:44 +1000
Subject: [PATCH] powerpc/cell: Cleanup sysreset_hack for IBM cell blades
This patch adds a config option for the sysreset_hack used for
IBM Cell blades. The code is moves from pervasive.c into ras.c and
gets it's own init method.
Signed-off-by: Christian Krafft <krafft@de.ibm.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
arch/powerpc/platforms/cell/Kconfig | 8 +++++
arch/powerpc/platforms/cell/pervasive.c | 27 +--------------
arch/powerpc/platforms/cell/pervasive.h | 9 +++++
arch/powerpc/platforms/cell/ras.c | 46 +++++++++++++++++++++++++
4 files changed, 64 insertions(+), 26 deletions(-)
diff --git a/arch/powerpc/platforms/cell/Kconfig b/arch/powerpc/platforms/cell/Kconfig
index 6ee571f743c50..2d1957bc450d4 100644
--- a/arch/powerpc/platforms/cell/Kconfig
+++ b/arch/powerpc/platforms/cell/Kconfig
@@ -83,6 +83,14 @@ config CBE_RAS
depends on PPC_CELL_NATIVE
default y
+config PPC_IBM_CELL_RESETBUTTON
+ bool "IBM Cell Blade Pinhole reset button"
+ depends on CBE_RAS && PPC_IBM_CELL_BLADE
+ default y
+ help
+ Support Pinhole Resetbutton on IBM Cell blades.
+ This adds a method to trigger system reset via front panel pinhole button.
+
config CBE_THERM
tristate "CBE thermal support"
default m
diff --git a/arch/powerpc/platforms/cell/pervasive.c b/arch/powerpc/platforms/cell/pervasive.c
index 8a3631ce912ba..efdacc8295765 100644
--- a/arch/powerpc/platforms/cell/pervasive.c
+++ b/arch/powerpc/platforms/cell/pervasive.c
@@ -38,8 +38,6 @@
#include "pervasive.h"
-static int sysreset_hack;
-
static void cbe_power_save(void)
{
unsigned long ctrl, thread_switch_control;
@@ -87,9 +85,6 @@ 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);
@@ -98,19 +93,7 @@ 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;
+ return cbe_sysreset_hack();
#ifdef CONFIG_CBE_RAS
case SRR1_WAKESYSERR:
cbe_system_error_exception(regs);
@@ -134,8 +117,6 @@ void __init cbe_pervasive_init(void)
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)
@@ -144,12 +125,6 @@ void __init cbe_pervasive_init(void)
/* Enable Pause(0) control bit */
out_be64(®s->pmcr, in_be64(®s->pmcr) |
CBE_PMD_PAUSE_ZERO_CONTROL);
-
- /* Enable JTAG system-reset hack */
- if (sysreset_hack)
- out_be32(®s->fir_mode_reg,
- in_be32(®s->fir_mode_reg) |
- CBE_PMD_FIR_MODE_M8);
}
ppc_md.power_save = cbe_power_save;
diff --git a/arch/powerpc/platforms/cell/pervasive.h b/arch/powerpc/platforms/cell/pervasive.h
index 7b50947f80444..fd4d7b7092b43 100644
--- a/arch/powerpc/platforms/cell/pervasive.h
+++ b/arch/powerpc/platforms/cell/pervasive.h
@@ -30,4 +30,13 @@ extern void cbe_system_error_exception(struct pt_regs *regs);
extern void cbe_maintenance_exception(struct pt_regs *regs);
extern void cbe_thermal_exception(struct pt_regs *regs);
+#ifdef CONFIG_PPC_IBM_CELL_RESETBUTTON
+extern int cbe_sysreset_hack(void);
+#else
+static inline int cbe_sysreset_hack(void)
+{
+ return 1;
+}
+#endif /* CONFIG_PPC_IBM_CELL_RESETBUTTON */
+
#endif
diff --git a/arch/powerpc/platforms/cell/ras.c b/arch/powerpc/platforms/cell/ras.c
index 505f9b9bdf0c8..2a14b052abcd7 100644
--- a/arch/powerpc/platforms/cell/ras.c
+++ b/arch/powerpc/platforms/cell/ras.c
@@ -236,6 +236,52 @@ static struct notifier_block cbe_ptcal_reboot_notifier = {
.notifier_call = cbe_ptcal_notify_reboot
};
+#ifdef CONFIG_PPC_IBM_CELL_RESETBUTTON
+static int sysreset_hack;
+
+static int __init cbe_sysreset_init(void)
+{
+ struct cbe_pmd_regs __iomem *regs;
+
+ sysreset_hack = machine_is_compatible("IBM,CBPLUS-1.0");
+ if (!sysreset_hack)
+ return 0;
+
+ regs = cbe_get_cpu_pmd_regs(0);
+ if (!regs)
+ return 0;
+
+ /* Enable JTAG system-reset hack */
+ out_be32(®s->fir_mode_reg,
+ in_be32(®s->fir_mode_reg) |
+ CBE_PMD_FIR_MODE_M8);
+
+ return 0;
+}
+device_initcall(cbe_sysreset_init);
+
+int cbe_sysreset_hack(void)
+{
+ struct cbe_pmd_regs __iomem *regs;
+
+ /*
+ * 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 && (smp_processor_id() == 0)) {
+ regs = cbe_get_cpu_pmd_regs(0);
+ if (!regs)
+ return 0;
+ if (in_be64(®s->ras_esc_0) & 0x0000ffff) {
+ out_be64(®s->ras_esc_0, 0);
+ return 0;
+ }
+ }
+ return 1;
+}
+#endif /* CONFIG_PPC_IBM_CELL_RESETBUTTON */
+
int __init cbe_ptcal_init(void)
{
int ret;
--
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