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authorFinn Thain <fthain@telegraphics.com.au>2017-01-02 04:53:54 -0500
committerGeert Uytterhoeven <geert@linux-m68k.org>2017-02-09 14:18:18 +0100
commit3cd53b14e7c471f6c33f3645a5200a30ffb3f861 (patch)
treef5038c70766b95fb4b018a1ee01ab8b04d2c3adb /arch/m68k/mac
parentc7ff87409d1a1b87d5a0ea7149416071dc8332cb (diff)
downloadlinux-3cd53b14e7c471f6c33f3645a5200a30ffb3f861.tar.bz2
m68k/mac: Improve NMI handler
mac_nmi_handler() is useless in its present form and locks up my PowerBook 180. Let's throw out the dead code and make it do something useful: print a register dump and a stack trace. mac_debug_handler() is also dead code. Remove it along with its static data. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Diffstat (limited to 'arch/m68k/mac')
-rw-r--r--arch/m68k/mac/macints.c67
1 files changed, 8 insertions, 59 deletions
diff --git a/arch/m68k/mac/macints.c b/arch/m68k/mac/macints.c
index 9f98c0871901..f9672bbd566f 100644
--- a/arch/m68k/mac/macints.c
+++ b/arch/m68k/mac/macints.c
@@ -127,12 +127,9 @@
#define SHUTUP_SONIC
-/*
- * console_loglevel determines NMI handler function
- */
+extern void show_registers(struct pt_regs *);
irqreturn_t mac_nmi_handler(int, void *);
-irqreturn_t mac_debug_handler(int, void *);
/* #define DEBUG_MACINTS */
@@ -276,65 +273,17 @@ static void mac_irq_shutdown(struct irq_data *data)
mac_irq_disable(data);
}
-static int num_debug[8];
-
-irqreturn_t mac_debug_handler(int irq, void *dev_id)
-{
- if (num_debug[irq] < 10) {
- printk("DEBUG: Unexpected IRQ %d\n", irq);
- num_debug[irq]++;
- }
- return IRQ_HANDLED;
-}
-
-static int in_nmi;
-static volatile int nmi_hold;
+static volatile int in_nmi;
irqreturn_t mac_nmi_handler(int irq, void *dev_id)
{
- int i;
- /*
- * generate debug output on NMI switch if 'debug' kernel option given
- * (only works with Penguin!)
- */
-
- in_nmi++;
- for (i=0; i<100; i++)
- udelay(1000);
-
- if (in_nmi == 1) {
- nmi_hold = 1;
- printk("... pausing, press NMI to resume ...");
- } else {
- printk(" ok!\n");
- nmi_hold = 0;
- }
+ if (in_nmi)
+ return IRQ_HANDLED;
+ in_nmi = 1;
- barrier();
+ pr_info("Non-Maskable Interrupt\n");
+ show_registers(get_irq_regs());
- while (nmi_hold == 1)
- udelay(1000);
-
- if (console_loglevel >= 8) {
-#if 0
- struct pt_regs *fp = get_irq_regs();
- show_state();
- printk("PC: %08lx\nSR: %04x SP: %p\n", fp->pc, fp->sr, fp);
- printk("d0: %08lx d1: %08lx d2: %08lx d3: %08lx\n",
- fp->d0, fp->d1, fp->d2, fp->d3);
- printk("d4: %08lx d5: %08lx a0: %08lx a1: %08lx\n",
- fp->d4, fp->d5, fp->a0, fp->a1);
-
- if (STACK_MAGIC != *(unsigned long *)current->kernel_stack_page)
- printk("Corrupted stack page\n");
- printk("Process %s (pid: %d, stackpage=%08lx)\n",
- current->comm, current->pid, current->kernel_stack_page);
- if (intr_count == 1)
- dump_stack((struct frame *)fp);
-#else
- /* printk("NMI "); */
-#endif
- }
- in_nmi--;
+ in_nmi = 0;
return IRQ_HANDLED;
}