patch-2.3.16 linux/arch/ppc/kernel/openpic.c

• Lines: 521
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.3.15/linux/arch/ppc/kernel/openpic.c
• Orig date: Mon Jul 12 15:12:55 1999

diff -u --recursive --new-file v2.3.15/linux/arch/ppc/kernel/openpic.c linux/arch/ppc/kernel/openpic.c
@@ -1,520 +0,0 @@
-/*
- *  arch/ppc/kernel/openpic.c -- OpenPIC Interrupt Handling
- *
- *  Copyright (C) 1997 Geert Uytterhoeven
- *
- *  This file is subject to the terms and conditions of the GNU General Public
- *  License.  See the file COPYING in the main directory of this archive
- *  for more details.
- */
-
-
-/*
- *  Note: Interprocessor Interrupt (IPI) and Timer support is incomplete
- */
-
-
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/init.h>
-#include <linux/openpic.h>
-#include <asm/ptrace.h>
-#include <asm/signal.h>
-#include <asm/io.h>
-#include <asm/irq.h>
-
-
-#define REGISTER_DEBUG
-#undef REGISTER_DEBUG
-
-
-volatile struct OpenPIC *OpenPIC = NULL;
-u_int OpenPIC_NumInitSenses __initdata = 0;
-u_char *OpenPIC_InitSenses __initdata = NULL;
-
-static u_int NumProcessors;
-static u_int NumSources;
-
-
-    /*
-     *  Accesses to the current processor's registers
-     */
-
-#ifndef __powerpc__
-#define THIS_CPU		Private
-#define CHECK_THIS_CPU		do {} while (0)
-#else
-#define THIS_CPU		Processor[cpu]
-#define CHECK_THIS_CPU		check_arg_cpu(cpu)
-#endif
-
-
-    /*
-     *  Sanity checks
-     */
-
-#if 1
-#define check_arg_ipi(ipi) \
-    if (ipi < 0 || ipi >= OPENPIC_NUM_IPI) \
-	printk("openpic.c:%d: illegal ipi %d\n", __LINE__, ipi);
-#define check_arg_timer(timer) \
-    if (timer < 0 || timer >= OPENPIC_NUM_TIMERS) \
-	printk("openpic.c:%d: illegal timer %d\n", __LINE__, timer);
-#define check_arg_vec(vec) \
-    if (vec < 0 || vec >= OPENPIC_NUM_VECTORS) \
-	printk("openpic.c:%d: illegal vector %d\n", __LINE__, vec);
-#define check_arg_pri(pri) \
-    if (pri < 0 || pri >= OPENPIC_NUM_PRI) \
-	printk("openpic.c:%d: illegal priority %d\n", __LINE__, pri);
-#define check_arg_irq(irq) \
-    if (irq < 0 || irq >= NumSources) \
-	printk("openpic.c:%d: illegal irq %d\n", __LINE__, irq);
-#define check_arg_cpu(cpu) \
-    if (cpu < 0 || cpu >= NumProcessors) \
-	printk("openpic.c:%d: illegal cpu %d\n", __LINE__, cpu);
-#else
-#define check_arg_ipi(ipi)	do {} while (0)
-#define check_arg_timer(timer)	do {} while (0)
-#define check_arg_vec(vec)	do {} while (0)
-#define check_arg_pri(pri)	do {} while (0)
-#define check_arg_irq(irq)	do {} while (0)
-#define check_arg_cpu(cpu)	do {} while (0)
-#endif
-
-
-    /*
-     *  Dummy interrupt handler
-     */
-
-static void no_action(int ir1, void *dev, struct pt_regs *regs)
-{}
-
-
-    /*
-     *  I/O functions
-     */
-
-#ifdef __i386__
-static inline u_int ld_le32(volatile u_int *addr)
-{
-    return *addr;
-}
-
-static inline void out_le32(volatile u_int *addr, u_int val)
-{
-    *addr = val;
-}
-#endif
-
-u_int openpic_read(volatile u_int *addr)
-{
-    u_int val;
-
-    val = ld_le32(addr);
-#ifdef REGISTER_DEBUG
-    printk("openpic_read(0x%08x) = 0x%08x\n", (u_int)addr, val);
-#endif
-    return val;
-}
-
-static inline void openpic_write(volatile u_int *addr, u_int val)
-{
-#ifdef REGISTER_DEBUG
-    printk("openpic_write(0x%08x, 0x%08x)\n", (u_int)addr, val);
-#endif
-    out_le32(addr, val);
-}
-
-
-static inline u_int openpic_readfield(volatile u_int *addr, u_int mask)
-{
-    u_int val = openpic_read(addr);
-    return val & mask;
-}
-
-inline void openpic_writefield(volatile u_int *addr, u_int mask,
-				      u_int field)
-{
-    u_int val = openpic_read(addr);
-    openpic_write(addr, (val & ~mask) | (field & mask));
-}
-
-static inline void openpic_clearfield(volatile u_int *addr, u_int mask)
-{
-    openpic_writefield(addr, mask, 0);
-}
-
-static inline void openpic_setfield(volatile u_int *addr, u_int mask)
-{
-    openpic_writefield(addr, mask, mask);
-}
-
-
-    /*
-     *  Update a Vector/Priority register in a safe manner. The interrupt will
-     *  be disabled.
-     */
-
-static void openpic_safe_writefield(volatile u_int *addr, u_int mask,
-				    u_int field)
-{
-    openpic_setfield(addr, OPENPIC_MASK);
-    /* wait until it's not in use */
-    while (openpic_read(addr) & OPENPIC_ACTIVITY);
-    openpic_writefield(addr, mask | OPENPIC_MASK, field | OPENPIC_MASK);
-}
-
-
-/* -------- Global Operations ---------------------------------------------- */
-
-
-    /*
-     *  Initialize the OpenPIC
-     */
-
-__initfunc(void openpic_init(int main_pic))
-{
-    u_int t, i;
-    u_int timerfreq;
-    const char *version;
-
-    if (!OpenPIC)
-	panic("No OpenPIC found");
-
-    if ( ppc_md.progress ) ppc_md.progress("openpic enter",0x122);
-
-    t = openpic_read(&OpenPIC->Global.Feature_Reporting0);
-    switch (t & OPENPIC_FEATURE_VERSION_MASK) {
-	case 1:
-	    version = "1.0";
-	    break;
-	case 2:
-	    version = "1.2";
-	    break;
-	case 3:
-	    version = "1.3";
-	    break;
-	default:
-	    version = "?";
-	    break;
-    }
-    NumProcessors = ((t & OPENPIC_FEATURE_LAST_PROCESSOR_MASK) >>
-		     OPENPIC_FEATURE_LAST_PROCESSOR_SHIFT) + 1;
-    NumSources = ((t & OPENPIC_FEATURE_LAST_SOURCE_MASK) >>
-		  OPENPIC_FEATURE_LAST_SOURCE_SHIFT) + 1;
-
-    printk("OpenPIC Version %s (%d CPUs and %d IRQ sources) at %p\n", version,
-	   NumProcessors, NumSources, OpenPIC);
-    timerfreq = openpic_read(&OpenPIC->Global.Timer_Frequency);
-    printk("OpenPIC timer frequency is ");
-    if (timerfreq)
-	printk("%d Hz\n", timerfreq);
-    else
-	printk("not set\n");
-
-    if ( main_pic )
-    {
-	    if ( ppc_md.progress ) ppc_md.progress("openpic main",0x3ff);
-      
-	    /* Initialize timer interrupts */
-	    for (i = 0; i < OPENPIC_NUM_TIMERS; i++) {
-		    /* Disabled, Priority 0 */
-		    openpic_inittimer(i, 0, OPENPIC_VEC_TIMER+i);
-		    /* No processor */
-		    openpic_maptimer(i, 0);
-	    }
-	    
-	    /* Initialize IPI interrupts */
-	    for (i = 0; i < OPENPIC_NUM_IPI; i++) {
-		    /* Disabled, Priority 0 */
-		    openpic_initipi(i, 0, OPENPIC_VEC_IPI+i);
-	    }
-	    
-	    if ( ppc_md.progress ) ppc_md.progress("openpic initirq",0x3bb);
-	    /* Initialize external interrupts */
-	    /* SIOint (8259 cascade) is special */
-	    openpic_initirq(0, 8, OPENPIC_VEC_SOURCE, 1, 1);
-	    
-	    if ( ppc_md.progress ) ppc_md.progress("openpic map",0x3cc);
-	    /* Processor 0 */
-	    openpic_mapirq(0, 1<<0);
-	    for (i = 1; i < NumSources; i++) {
-		    /* Enabled, Priority 8 */
-		    openpic_initirq(i, 8, OPENPIC_VEC_SOURCE+i, 0,
-				    i < OpenPIC_NumInitSenses ? OpenPIC_InitSenses[i] : 1);
-		    /* Processor 0 */
-		    openpic_mapirq(i, 1<<0);
-	    }
-	    
-	    /* Initialize the spurious interrupt */
-	    openpic_set_spurious(OPENPIC_VEC_SPURIOUS);
-	    
-	    if (request_irq(IRQ_8259_CASCADE, no_action, SA_INTERRUPT,
-			    "82c59 cascade", NULL))
-		    printk("Unable to get OpenPIC IRQ 0 for cascade\n");
-	    openpic_set_priority(0, 0);
-	    openpic_disable_8259_pass_through();
-    }
-    if ( ppc_md.progress ) ppc_md.progress("openpic exit",0x222);
-}
-
-
-    /*
-     *  Reset the OpenPIC
-     */
-
-void openpic_reset(void)
-{
-    openpic_setfield(&OpenPIC->Global.Global_Configuration0,
-    		       OPENPIC_CONFIG_RESET);
-}
-
-
-    /*
-     *  Enable/disable 8259 Pass Through Mode
-     */
-
-void openpic_enable_8259_pass_through(void)
-{
-    openpic_clearfield(&OpenPIC->Global.Global_Configuration0,
-    		       OPENPIC_CONFIG_8259_PASSTHROUGH_DISABLE);
-}
-
-void openpic_disable_8259_pass_through(void)
-{
-    openpic_setfield(&OpenPIC->Global.Global_Configuration0,
-    		     OPENPIC_CONFIG_8259_PASSTHROUGH_DISABLE);
-}
-
-
-#ifndef __i386__
-    /*
-     *  Find out the current interrupt
-     */
-
-u_int openpic_irq(u_int cpu)
-{
-    u_int vec;
-
-    check_arg_cpu(cpu);
-    vec = openpic_readfield(&OpenPIC->THIS_CPU.Interrupt_Acknowledge,
-			    OPENPIC_VECTOR_MASK);
-#if 0
-if (vec != 22 /* SCSI */)
-printk("++openpic_irq: %d\n", vec);
-#endif
-    return vec;
-}
-#endif
-
-
-    /*
-     *  Signal end of interrupt (EOI) processing
-     */
-
-#ifndef __powerpc__
-void openpic_eoi(void)
-#else
-void openpic_eoi(u_int cpu)
-#endif
-{
-    check_arg_cpu(cpu);
-    openpic_write(&OpenPIC->THIS_CPU.EOI, 0);
-}
-
-
-    /*
-     *  Get/set the current task priority
-     */
-
-#ifndef __powerpc__
-u_int openpic_get_priority(void)
-#else
-u_int openpic_get_priority(u_int cpu)
-#endif
-{
-    CHECK_THIS_CPU;
-    return openpic_readfield(&OpenPIC->THIS_CPU.Current_Task_Priority,
-			     OPENPIC_CURRENT_TASK_PRIORITY_MASK);
-}
-
-#ifndef __powerpc__
-void openpic_set_priority(u_int pri)
-#else
-void openpic_set_priority(u_int cpu, u_int pri)
-#endif
-{
-    CHECK_THIS_CPU;
-    check_arg_pri(pri);
-    openpic_writefield(&OpenPIC->THIS_CPU.Current_Task_Priority,
-    		       OPENPIC_CURRENT_TASK_PRIORITY_MASK, pri);
-}
-
-    /*
-     *  Get/set the spurious vector
-     */
-
-u_int openpic_get_spurious(void)
-{
-    return openpic_readfield(&OpenPIC->Global.Spurious_Vector,
-    			     OPENPIC_VECTOR_MASK);
-}
-
-void openpic_set_spurious(u_int vec)
-{
-    check_arg_vec(vec);
-    openpic_writefield(&OpenPIC->Global.Spurious_Vector, OPENPIC_VECTOR_MASK,
-    		       vec);
-}
-
-
-    /*
-     *  Initialize one or more CPUs
-     */
-
-void openpic_init_processor(u_int cpumask)
-{
-    openpic_write(&OpenPIC->Global.Processor_Initialization, cpumask);
-}
-
-
-/* -------- Interprocessor Interrupts -------------------------------------- */
-
-
-    /*
-     *  Initialize an interprocessor interrupt (and disable it)
-     *
-     *  ipi: OpenPIC interprocessor interrupt number
-     *  pri: interrupt source priority
-     *  vec: the vector it will produce
-     */
-
-void openpic_initipi(u_int ipi, u_int pri, u_int vec)
-{
-    check_arg_timer(ipi);
-    check_arg_pri(pri);
-    check_arg_vec(vec);
-    openpic_safe_writefield(&OpenPIC->Global.IPI_Vector_Priority(ipi),
-    			    OPENPIC_PRIORITY_MASK | OPENPIC_VECTOR_MASK,
-    			    (pri << OPENPIC_PRIORITY_SHIFT) | vec);
-}
-
-
-    /*
-     *  Send an IPI to one or more CPUs
-     */
-
-#ifndef __powerpc__
-void openpic_cause_IPI(u_int ipi, u_int cpumask)
-#else
-void openpic_cause_IPI(u_int cpu, u_int ipi, u_int cpumask)
-#endif
-{
-    CHECK_THIS_CPU;
-    check_arg_ipi(ipi);
-    openpic_write(&OpenPIC->THIS_CPU.IPI_Dispatch(ipi), cpumask);
-}
-
-
-/* -------- Timer Interrupts ----------------------------------------------- */
-
-
-    /*
-     *  Initialize a timer interrupt (and disable it)
-     *
-     *  timer: OpenPIC timer number
-     *  pri: interrupt source priority
-     *  vec: the vector it will produce
-     */
-
-void openpic_inittimer(u_int timer, u_int pri, u_int vec)
-{
-    check_arg_timer(timer);
-    check_arg_pri(pri);
-    check_arg_vec(vec);
-    openpic_safe_writefield(&OpenPIC->Global.Timer[timer].Vector_Priority,
-    			    OPENPIC_PRIORITY_MASK | OPENPIC_VECTOR_MASK,
-    			    (pri << OPENPIC_PRIORITY_SHIFT) | vec);
-}
-
-
-    /*
-     *  Map a timer interrupt to one or more CPUs
-     */
-
-void openpic_maptimer(u_int timer, u_int cpumask)
-{
-    check_arg_timer(timer);
-    openpic_write(&OpenPIC->Global.Timer[timer].Destination, cpumask);
-}
-
-
-/* -------- Interrupt Sources ---------------------------------------------- */
-
-
-    /*
-     *  Enable/disable an interrupt source
-     */
-
-void openpic_enable_irq(u_int irq)
-{
-    check_arg_irq(irq);
-    openpic_clearfield(&OpenPIC->Source[irq].Vector_Priority, OPENPIC_MASK);
-}
-
-void openpic_disable_irq(u_int irq)
-{
-    check_arg_irq(irq);
-    openpic_setfield(&OpenPIC->Source[irq].Vector_Priority, OPENPIC_MASK);
-}
-
-
-    /*
-     *  Initialize an interrupt source (and disable it!)
-     *
-     *  irq: OpenPIC interrupt number
-     *  pri: interrupt source priority
-     *  vec: the vector it will produce
-     *  pol: polarity (1 for positive, 0 for negative)
-     *  sense: 1 for level, 0 for edge
-     */
-
-void openpic_initirq(u_int irq, u_int pri, u_int vec, int pol, int sense)
-{
-    check_arg_irq(irq);
-    check_arg_pri(pri);
-    check_arg_vec(vec);
-    openpic_safe_writefield(&OpenPIC->Source[irq].Vector_Priority,
-    			    OPENPIC_PRIORITY_MASK | OPENPIC_VECTOR_MASK |
-    			    OPENPIC_SENSE_POLARITY | OPENPIC_SENSE_LEVEL,
-    			    (pri << OPENPIC_PRIORITY_SHIFT) | vec |
-			    (pol ? OPENPIC_SENSE_POLARITY : 0) |
-			    (sense ? OPENPIC_SENSE_LEVEL : 0));
-}
-
-
-    /*
-     *  Map an interrupt source to one or more CPUs
-     */
-
-void openpic_mapirq(u_int irq, u_int cpumask)
-{
-    check_arg_irq(irq);
-    openpic_write(&OpenPIC->Source[irq].Destination, cpumask);
-}
-
-
-    /*
-     *  Set the sense for an interrupt source (and disable it!)
-     *
-     *  sense: 1 for level, 0 for edge
-     */
-
-void openpic_set_sense(u_int irq, int sense)
-{
-    check_arg_irq(irq);
-    openpic_safe_writefield(&OpenPIC->Source[irq].Vector_Priority,
-    			    OPENPIC_SENSE_LEVEL,
-			    (sense ? OPENPIC_SENSE_LEVEL : 0));
-}