patch-2.4.20 linux-2.4.20/arch/ppc64/kernel/irq.c

• Lines: 159
• Date: Thu Nov 28 15:53:11 2002
• Orig file: linux-2.4.19/arch/ppc64/kernel/irq.c
• Orig date: Fri Aug 2 17:39:43 2002

diff -urN linux-2.4.19/arch/ppc64/kernel/irq.c linux-2.4.20/arch/ppc64/kernel/irq.c
@@ -1,6 +1,4 @@
 /*
- * 
- *
  *  arch/ppc/kernel/irq.c
  *
  *  Derived from arch/i386/kernel/irq.c
@@ -25,7 +23,6 @@
  * should be easier.
  */
 
-
 #include <linux/ptrace.h>
 #include <linux/errno.h>
 #include <linux/threads.h>
@@ -42,6 +39,7 @@
 #include <linux/delay.h>
 #include <linux/irq.h>
 #include <linux/proc_fs.h>
+#include <linux/seq_file.h>
 #include <linux/random.h>
 
 #include <asm/uaccess.h>
@@ -56,6 +54,7 @@
 #include <asm/iSeries/LparData.h>
 #include <asm/machdep.h>
 #include <asm/paca.h>
+#include <asm/perfmon.h>
 
 #include "local_irq.h"
 
@@ -99,7 +98,7 @@
  * this needs to be removed.
  * -- Cort
  */
-#define IRQ_KMALLOC_ENTRIES 8
+#define IRQ_KMALLOC_ENTRIES 16
 static int cache_bitmask = 0;
 static struct irqaction malloc_cache[IRQ_KMALLOC_ENTRIES];
 extern int mem_init_done;
@@ -554,58 +553,61 @@
 	spin_unlock(&desc->lock);
 }
 
-int do_IRQ(struct pt_regs *regs, int isfake)
+int do_IRQ(struct pt_regs *regs)
 {
 	int cpu = smp_processor_id();
-	int irq;
+	int irq, first = 1;
+#ifdef CONFIG_PPC_ISERIES
 	struct paca_struct *lpaca;
-	struct ItLpQueue * lpq;
-
-	/* if(cpu) udbg_printf("Entering do_IRQ\n");  */
-
-        irq_enter(cpu);
+	struct ItLpQueue *lpq;
+#endif
 
-	if (naca->platform != PLATFORM_ISERIES_LPAR) {
-	
-		/* every arch is required to have a get_irq -- Cort */
-		irq = ppc_md.get_irq( regs );
+	irq_enter(cpu);
 
-		if ( irq >= 0 ) {
-			ppc_irq_dispatch_handler( regs, irq );
-			if (ppc_md.post_irq)
-				ppc_md.post_irq( regs, irq );
-		} else {
-			/* -2 means ignore, already handled */
-			if (irq != -2) {
-				printk(KERN_DEBUG "Bogus interrupt %d from PC = %lx\n",
-					irq, regs->nip);
-				ppc_spurious_interrupts++;
-			}
-		}
-	}
-	/* if on iSeries partition */
-	else {
-		lpaca = get_paca();
+#ifdef CONFIG_PPC_ISERIES
+	lpaca = get_paca();
 #ifdef CONFIG_SMP
-		if ( lpaca->xLpPaca.xIntDword.xFields.xIpiCnt ) {
-			lpaca->xLpPaca.xIntDword.xFields.xIpiCnt = 0;
-			iSeries_smp_message_recv( regs );
-		}
-#endif /* CONFIG_SMP */
-		lpq = lpaca->lpQueuePtr;
-		if ( lpq && ItLpQueue_isLpIntPending( lpq ) )
-			lpEvent_count += ItLpQueue_process( lpq, regs );
+	if (lpaca->xLpPaca.xIntDword.xFields.xIpiCnt) {
+		lpaca->xLpPaca.xIntDword.xFields.xIpiCnt = 0;
+		iSeries_smp_message_recv(regs);
 	}
-		
+#endif /* CONFIG_SMP */
+	lpq = lpaca->lpQueuePtr;
+	if (lpq && ItLpQueue_isLpIntPending(lpq))
+		lpEvent_count += ItLpQueue_process(lpq, regs);
+#else
+	/*
+	 * Every arch is required to implement ppc_md.get_irq.
+	 * This function will either return an irq number or -1 to
+	 * indicate there are no more pending.  But the first time
+	 * through the loop this means there wasn't an IRQ pending.
+	 * The value -2 is for buggy hardware and means that this IRQ
+	 * has already been handled. -- Tom
+	 */
+	while ((irq = ppc_md.get_irq(regs)) >= 0) {
+		ppc_irq_dispatch_handler(regs, irq);
+		first = 0;
+	}
+	if (irq != -2 && first)
+		/* That's not SMP safe ... but who cares ? */
+		ppc_spurious_interrupts++;
+#endif
+
         irq_exit(cpu);
 
-	if (naca->platform == PLATFORM_ISERIES_LPAR) {
-		if ( lpaca->xLpPaca.xIntDword.xFields.xDecrInt ) {
-			lpaca->xLpPaca.xIntDword.xFields.xDecrInt = 0;
-			/* Signal a fake decrementer interrupt */
-			timer_interrupt( regs );
-		}
+#ifdef CONFIG_PPC_ISERIES
+	if (lpaca->xLpPaca.xIntDword.xFields.xDecrInt) {
+		lpaca->xLpPaca.xIntDword.xFields.xDecrInt = 0;
+		/* Signal a fake decrementer interrupt */
+		timer_interrupt(regs);
+	}
+
+	if (lpaca->xLpPaca.xIntDword.xFields.xPdcInt) {
+		lpaca->xLpPaca.xIntDword.xFields.xPdcInt = 0;
+		/* Signal a fake PMC interrupt */
+		PerformanceMonitorException();
 	}
+#endif
 
 	if (softirq_pending(cpu))
 		do_softirq();
@@ -902,9 +904,11 @@
 		unsigned i;
 		for (i=0; i<MAX_PACAS; ++i) {
 			if ( paca[i].prof_buffer && (new_value & 1) )
-				paca[i].prof_enabled = 1;
-			else
-				paca[i].prof_enabled = 0;
+				paca[i].prof_mode = PMC_STATE_DECR_PROFILE;
+			else {
+				if(paca[i].prof_mode != PMC_STATE_INITIAL) 
+					paca[i].prof_mode = PMC_STATE_READY;
+			}
 			new_value >>= 1;
 		}
 	}