patch-2.2.14 linux/arch/alpha/kernel/irq.h

• Lines: 60
• Date: Tue Jan 4 10:12:11 2000
• Orig file: v2.2.13/linux/arch/alpha/kernel/irq.h
• Orig date: Mon Aug 9 16:05:54 1999

diff -u --recursive --new-file v2.2.13/linux/arch/alpha/kernel/irq.h linux/arch/alpha/kernel/irq.h
@@ -9,6 +9,7 @@
  */
 
 #include <linux/config.h>
+#include <asm/irq.h>
 
 #define STANDARD_INIT_IRQ_PROLOG	\
 	outb(0, DMA1_RESET_REG);	\
@@ -16,7 +17,8 @@
 	outb(0, DMA1_CLR_MASK_REG);	\
 	outb(0, DMA2_CLR_MASK_REG)
 
-extern unsigned long alpha_irq_mask;
+extern unsigned long _alpha_irq_masks[2];
+#define alpha_irq_mask _alpha_irq_masks[0]
 
 extern void generic_ack_irq(unsigned long irq);
 extern void isa_device_interrupt(unsigned long vector, struct pt_regs * regs);
@@ -47,4 +49,41 @@
 #else
 #define TIMER_IRQ  RTC_IRQ		 /* timer is the rtc */
 #endif
+
+/*
+ * PROBE_MASK is the bitset of irqs that we consider for autoprobing.
+ */
+
+/* NOTE: we only handle the first 64 IRQs in this code. */
+
+/* The normal mask includes all the IRQs except timer IRQ 0.  */
+#define _PROBE_MASK(nr_irqs)	\
+	(((nr_irqs > 63) ? ~0UL : ((1UL << (nr_irqs & 63)) - 1)) & ~1UL)
+
+/* Mask out unused timer irq 0 and RTC irq 8. */
+#define P2K_PROBE_MASK		(_PROBE_MASK(16) & ~0x101UL)
+
+/* Mask out unused timer irq 0, "irqs" 20-30, and the EISA cascade. */
+#define ALCOR_PROBE_MASK	(_PROBE_MASK(48) & ~0xfff000000001UL)
+
+/* Leave timer IRQ 0 in the mask.  */
+#define RUFFIAN_PROBE_MASK	(_PROBE_MASK(48) | 1UL)
+
+/* Do not probe/enable beyond the PCI devices. */
+#define TSUNAMI_PROBE_MASK	_PROBE_MASK(48)
+
+#if defined(CONFIG_ALPHA_GENERIC)
+# define PROBE_MASK	alpha_mv.irq_probe_mask
+#elif defined(CONFIG_ALPHA_P2K)
+# define PROBE_MASK	P2K_PROBE_MASK
+#elif defined(CONFIG_ALPHA_ALCOR) || defined(CONFIG_ALPHA_XLT)
+# define PROBE_MASK	ALCOR_PROBE_MASK
+#elif defined(CONFIG_ALPHA_RUFFIAN)
+# define PROBE_MASK	RUFFIAN_PROBE_MASK
+#elif defined(CONFIG_ALPHA_DP264)
+# define PROBE_MASK	TSUNAMI_PROBE_MASK
+#else
+# define PROBE_MASK	_PROBE_MASK(NR_IRQS)
+#endif
+