patch-2.3.30 linux/include/asm-alpha/hw_irq.h

• Lines: 92
• Date: Mon Dec 6 17:15:53 1999
• Orig file: v2.3.29/linux/include/asm-alpha/hw_irq.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.29/linux/include/asm-alpha/hw_irq.h linux/include/asm-alpha/hw_irq.h
@@ -0,0 +1,91 @@
+#ifndef _ALPHA_HW_IRQ_H
+#define _ALPHA_HW_IRQ_H
+/*
+ *	linux/arch/alpha/kernel/irq.h
+ *
+ *	Copyright (C) 1995 Linus Torvalds
+ *	Copyright (C) 1998 Richard Henderson
+ *
+ * This file contains declarations and inline functions for interfacing
+ * with the IRQ handling routines in irq.c.
+ */
+
+#include <linux/config.h>
+
+#define STANDARD_INIT_IRQ_PROLOG	\
+	outb(0, DMA1_RESET_REG);	\
+	outb(0, DMA2_RESET_REG);	\
+	outb(0, DMA1_CLR_MASK_REG);	\
+	outb(0, DMA2_CLR_MASK_REG)
+
+extern unsigned long _alpha_irq_masks[2];
+#define alpha_irq_mask _alpha_irq_masks[0]
+
+extern void common_ack_irq(unsigned long irq);
+extern void isa_device_interrupt(unsigned long vector, struct pt_regs * regs);
+extern void srm_device_interrupt(unsigned long vector, struct pt_regs * regs);
+
+extern void handle_irq(int irq, int ack, struct pt_regs * regs);
+
+#define RTC_IRQ    8
+#ifdef CONFIG_RTC
+#define TIMER_IRQ  0			 /* timer is the pit */
+#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
+
+
+extern char _stext;
+static inline void alpha_do_profile (unsigned long pc)
+{
+	if (prof_buffer && current->pid) {
+		pc -= (unsigned long) &_stext;
+		pc >>= prof_shift;
+		/*
+		 * Don't ignore out-of-bounds PC values silently,
+		 * put them into the last histogram slot, so if
+		 * present, they will show up as a sharp peak.
+		 */
+		if (pc > prof_len - 1)
+			pc = prof_len - 1;
+		atomic_inc((atomic_t *)&prof_buffer[pc]);
+	}
+}
+
+#endif