1 files changed, 191 insertions, 0 deletions

diff --git a/include/asm-sparc/irq.h b/include/asm-sparc/irq.h
new file mode 100644
index 000000000000..cee356b0dae3
--- /dev/null
+++ b/include/asm-sparc/irq.h
@@ -0,0 +1,191 @@
+/* $Id: irq.h,v 1.32 2000/08/26 02:42:28 anton Exp $
+ * irq.h: IRQ registers on the Sparc.
+ *
+ * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
+ */
+
+#ifndef _SPARC_IRQ_H
+#define _SPARC_IRQ_H
+
+#include <linux/config.h>
+#include <linux/linkage.h>
+#include <linux/threads.h>     /* For NR_CPUS */
+#include <linux/interrupt.h>
+
+#include <asm/system.h>     /* For SUN4M_NCPUS */
+#include <asm/btfixup.h>
+
+#define __irq_ino(irq) irq
+#define __irq_pil(irq) irq
+BTFIXUPDEF_CALL(char *, __irq_itoa, unsigned int)
+#define __irq_itoa(irq) BTFIXUP_CALL(__irq_itoa)(irq)
+
+#define NR_IRQS    16
+
+#define irq_canonicalize(irq)   (irq)
+
+/* Dave Redman (djhr@tadpole.co.uk)
+ * changed these to function pointers.. it saves cycles and will allow
+ * the irq dependencies to be split into different files at a later date
+ * sun4c_irq.c, sun4m_irq.c etc so we could reduce the kernel size.
+ * Jakub Jelinek (jj@sunsite.mff.cuni.cz)
+ * Changed these to btfixup entities... It saves cycles :)
+ */
+BTFIXUPDEF_CALL(void, disable_irq, unsigned int)
+BTFIXUPDEF_CALL(void, enable_irq, unsigned int)
+BTFIXUPDEF_CALL(void, disable_pil_irq, unsigned int)
+BTFIXUPDEF_CALL(void, enable_pil_irq, unsigned int)
+BTFIXUPDEF_CALL(void, clear_clock_irq, void)
+BTFIXUPDEF_CALL(void, clear_profile_irq, int)
+BTFIXUPDEF_CALL(void, load_profile_irq, int, unsigned int)
+
+static inline void disable_irq_nosync(unsigned int irq)
+{
+        BTFIXUP_CALL(disable_irq)(irq);
+}
+
+static inline void disable_irq(unsigned int irq)
+{
+        BTFIXUP_CALL(disable_irq)(irq);
+}
+
+static inline void enable_irq(unsigned int irq)
+{
+        BTFIXUP_CALL(enable_irq)(irq);
+}
+
+static inline void disable_pil_irq(unsigned int irq)
+{
+        BTFIXUP_CALL(disable_pil_irq)(irq);
+}
+
+static inline void enable_pil_irq(unsigned int irq)
+{
+        BTFIXUP_CALL(enable_pil_irq)(irq);
+}
+
+static inline void clear_clock_irq(void)
+{
+        BTFIXUP_CALL(clear_clock_irq)();
+}
+
+static inline void clear_profile_irq(int irq)
+{
+        BTFIXUP_CALL(clear_profile_irq)(irq);
+}
+
+static inline void load_profile_irq(int cpu, int limit)
+{
+        BTFIXUP_CALL(load_profile_irq)(cpu, limit);
+}
+
+extern void (*sparc_init_timers)(irqreturn_t (*lvl10_irq)(int, void *, struct pt_regs *));
+extern void claim_ticker14(irqreturn_t (*irq_handler)(int, void *, struct pt_regs *),
+                           int irq,
+                           unsigned int timeout);
+
+#ifdef CONFIG_SMP
+BTFIXUPDEF_CALL(void, set_cpu_int, int, int)
+BTFIXUPDEF_CALL(void, clear_cpu_int, int, int)
+BTFIXUPDEF_CALL(void, set_irq_udt, int)
+
+#define set_cpu_int(cpu,level) BTFIXUP_CALL(set_cpu_int)(cpu,level)
+#define clear_cpu_int(cpu,level) BTFIXUP_CALL(clear_cpu_int)(cpu,level)
+#define set_irq_udt(cpu) BTFIXUP_CALL(set_irq_udt)(cpu)
+#endif
+
+extern int request_fast_irq(unsigned int irq, irqreturn_t (*handler)(int, void *, struct pt_regs *), unsigned long flags, __const__ char *devname);
+
+/* On the sun4m, just like the timers, we have both per-cpu and master
+ * interrupt registers.
+ */
+
+/* These registers are used for sending/receiving irqs from/to
+ * different cpu's.
+ */
+struct sun4m_intreg_percpu {
+        unsigned int tbt;        /* Interrupts still pending for this cpu. */
+
+        /* These next two registers are WRITE-ONLY and are only
+         * "on bit" sensitive, "off bits" written have NO affect.
+         */
+        unsigned int clear;  /* Clear this cpus irqs here. */
+        unsigned int set;    /* Set this cpus irqs here. */
+        unsigned char space[PAGE_SIZE - 12];
+};
+
+/*
+ * djhr
+ * Actually the clear and set fields in this struct are misleading..
+ * according to the SLAVIO manual (and the same applies for the SEC)
+ * the clear field clears bits in the mask which will ENABLE that IRQ
+ * the set field sets bits in the mask to DISABLE the IRQ.
+ *
+ * Also the undirected_xx address in the SLAVIO is defined as
+ * RESERVED and write only..
+ *
+ * DAVEM_NOTE: The SLAVIO only specifies behavior on uniprocessor
+ *             sun4m machines, for MP the layout makes more sense.
+ */
+struct sun4m_intregs {
+        struct sun4m_intreg_percpu cpu_intregs[SUN4M_NCPUS];
+        unsigned int tbt;                /* IRQ's that are still pending. */
+        unsigned int irqs;               /* Master IRQ bits. */
+
+        /* Again, like the above, two these registers are WRITE-ONLY. */
+        unsigned int clear;              /* Clear master IRQ's by setting bits here. */
+        unsigned int set;                /* Set master IRQ's by setting bits here. */
+
+        /* This register is both READ and WRITE. */
+        unsigned int undirected_target;  /* Which cpu gets undirected irqs. */
+};
+
+extern struct sun4m_intregs *sun4m_interrupts;
+
+/* 
+ * Bit field defines for the interrupt registers on various
+ * Sparc machines.
+ */
+
+/* The sun4c interrupt register. */
+#define SUN4C_INT_ENABLE  0x01     /* Allow interrupts. */
+#define SUN4C_INT_E14     0x80     /* Enable level 14 IRQ. */
+#define SUN4C_INT_E10     0x20     /* Enable level 10 IRQ. */
+#define SUN4C_INT_E8      0x10     /* Enable level 8 IRQ. */
+#define SUN4C_INT_E6      0x08     /* Enable level 6 IRQ. */
+#define SUN4C_INT_E4      0x04     /* Enable level 4 IRQ. */
+#define SUN4C_INT_E1      0x02     /* Enable level 1 IRQ. */
+
+/* Dave Redman (djhr@tadpole.co.uk)
+ * The sun4m interrupt registers.
+ */
+#define SUN4M_INT_ENABLE        0x80000000
+#define SUN4M_INT_E14           0x00000080
+#define SUN4M_INT_E10           0x00080000
+
+#define SUN4M_HARD_INT(x)       (0x000000001 << (x))
+#define SUN4M_SOFT_INT(x)       (0x000010000 << (x))
+
+#define SUN4M_INT_MASKALL       0x80000000        /* mask all interrupts */
+#define SUN4M_INT_MODULE_ERR    0x40000000        /* module error */
+#define SUN4M_INT_M2S_WRITE     0x20000000        /* write buffer error */
+#define SUN4M_INT_ECC           0x10000000        /* ecc memory error */
+#define SUN4M_INT_FLOPPY        0x00400000        /* floppy disk */
+#define SUN4M_INT_MODULE        0x00200000        /* module interrupt */
+#define SUN4M_INT_VIDEO         0x00100000        /* onboard video */
+#define SUN4M_INT_REALTIME      0x00080000        /* system timer */
+#define SUN4M_INT_SCSI          0x00040000        /* onboard scsi */
+#define SUN4M_INT_AUDIO         0x00020000        /* audio/isdn */
+#define SUN4M_INT_ETHERNET      0x00010000        /* onboard ethernet */
+#define SUN4M_INT_SERIAL        0x00008000        /* serial ports */
+#define SUN4M_INT_KBDMS         0x00004000        /* keyboard/mouse */
+#define SUN4M_INT_SBUSBITS      0x00003F80        /* sbus int bits */
+
+#define SUN4M_INT_SBUS(x)       (1 << (x+7))
+#define SUN4M_INT_VME(x)        (1 << (x))
+
+struct irqaction;
+struct pt_regs;
+int handle_IRQ_event(unsigned int, struct pt_regs *, struct irqaction *);
+
+#endif