44377f622e
The defines and typedefs (hw_interrupt_type, no_irq_type, irq_desc_t) have been kept around for migration reasons. After more than two years it's time to remove them finally. This patch cleans up one of the remaining users. When all such patches hit mainline we can remove the defines and typedefs finally. Impact: cleanup Convert the last remaining users to struct irq_chip and remove the define. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Richard Henderson <rth@twiddle.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
275 lines
6.2 KiB
C
275 lines
6.2 KiB
C
/*
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* linux/arch/alpha/kernel/sys_jensen.c
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*
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* Copyright (C) 1995 Linus Torvalds
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* Copyright (C) 1998, 1999 Richard Henderson
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*
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* Code supporting the Jensen.
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*/
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/mm.h>
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#include <linux/sched.h>
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#include <linux/pci.h>
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#include <linux/init.h>
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#include <asm/ptrace.h>
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#include <asm/system.h>
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#define __EXTERN_INLINE inline
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#include <asm/io.h>
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#include <asm/jensen.h>
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#undef __EXTERN_INLINE
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#include <asm/dma.h>
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#include <asm/irq.h>
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#include <asm/mmu_context.h>
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#include <asm/pgtable.h>
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#include <asm/tlbflush.h>
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#include "proto.h"
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#include "irq_impl.h"
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#include "pci_impl.h"
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#include "machvec_impl.h"
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/*
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* Jensen is special: the vector is 0x8X0 for EISA interrupt X, and
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* 0x9X0 for the local motherboard interrupts.
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*
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* Note especially that those local interrupts CANNOT be masked,
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* which causes much of the pain below...
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*
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* 0x660 - NMI
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*
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* 0x800 - IRQ0 interval timer (not used, as we use the RTC timer)
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* 0x810 - IRQ1 line printer (duh..)
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* 0x860 - IRQ6 floppy disk
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*
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* 0x900 - COM1
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* 0x920 - COM2
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* 0x980 - keyboard
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* 0x990 - mouse
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*
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* PCI-based systems are more sane: they don't have the local
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* interrupts at all, and have only normal PCI interrupts from
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* devices. Happily it's easy enough to do a sane mapping from the
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* Jensen.
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*
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* Note that this means that we may have to do a hardware
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* "local_op" to a different interrupt than we report to the rest of the
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* world.
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*/
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static unsigned int
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jensen_local_startup(unsigned int irq)
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{
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/* the parport is really hw IRQ 1, silly Jensen. */
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if (irq == 7)
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i8259a_startup_irq(1);
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else
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/*
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* For all true local interrupts, set the flag that prevents
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* the IPL from being dropped during handler processing.
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*/
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if (irq_desc[irq].action)
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irq_desc[irq].action->flags |= IRQF_DISABLED;
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return 0;
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}
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static void
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jensen_local_shutdown(unsigned int irq)
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{
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/* the parport is really hw IRQ 1, silly Jensen. */
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if (irq == 7)
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i8259a_disable_irq(1);
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}
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static void
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jensen_local_enable(unsigned int irq)
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{
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/* the parport is really hw IRQ 1, silly Jensen. */
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if (irq == 7)
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i8259a_enable_irq(1);
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}
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static void
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jensen_local_disable(unsigned int irq)
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{
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/* the parport is really hw IRQ 1, silly Jensen. */
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if (irq == 7)
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i8259a_disable_irq(1);
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}
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static void
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jensen_local_ack(unsigned int irq)
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{
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/* the parport is really hw IRQ 1, silly Jensen. */
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if (irq == 7)
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i8259a_mask_and_ack_irq(1);
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}
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static void
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jensen_local_end(unsigned int irq)
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{
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/* the parport is really hw IRQ 1, silly Jensen. */
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if (irq == 7)
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i8259a_end_irq(1);
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}
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static struct irq_chip jensen_local_irq_type = {
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.typename = "LOCAL",
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.startup = jensen_local_startup,
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.shutdown = jensen_local_shutdown,
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.enable = jensen_local_enable,
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.disable = jensen_local_disable,
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.ack = jensen_local_ack,
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.end = jensen_local_end,
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};
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static void
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jensen_device_interrupt(unsigned long vector)
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{
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int irq;
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switch (vector) {
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case 0x660:
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printk("Whee.. NMI received. Probable hardware error\n");
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printk("61=%02x, 461=%02x\n", inb(0x61), inb(0x461));
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return;
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/* local device interrupts: */
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case 0x900: irq = 4; break; /* com1 -> irq 4 */
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case 0x920: irq = 3; break; /* com2 -> irq 3 */
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case 0x980: irq = 1; break; /* kbd -> irq 1 */
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case 0x990: irq = 9; break; /* mouse -> irq 9 */
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default:
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if (vector > 0x900) {
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printk("Unknown local interrupt %lx\n", vector);
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return;
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}
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irq = (vector - 0x800) >> 4;
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if (irq == 1)
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irq = 7;
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break;
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}
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/* If there is no handler yet... */
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if (irq_desc[irq].action == NULL) {
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/* If it is a local interrupt that cannot be masked... */
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if (vector >= 0x900)
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{
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/* Clear keyboard/mouse state */
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inb(0x64);
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inb(0x60);
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/* Reset serial ports */
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inb(0x3fa);
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inb(0x2fa);
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outb(0x0c, 0x3fc);
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outb(0x0c, 0x2fc);
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/* Clear NMI */
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outb(0,0x61);
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outb(0,0x461);
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}
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}
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#if 0
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/* A useful bit of code to find out if an interrupt is going wild. */
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{
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static unsigned int last_msg = 0, last_cc = 0;
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static int last_irq = -1, count = 0;
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unsigned int cc;
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__asm __volatile("rpcc %0" : "=r"(cc));
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++count;
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#define JENSEN_CYCLES_PER_SEC (150000000)
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if (cc - last_msg > ((JENSEN_CYCLES_PER_SEC) * 3) ||
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irq != last_irq) {
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printk(KERN_CRIT " irq %d count %d cc %u @ %lx\n",
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irq, count, cc-last_cc, get_irq_regs()->pc);
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count = 0;
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last_msg = cc;
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last_irq = irq;
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}
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last_cc = cc;
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}
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#endif
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handle_irq(irq);
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}
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static void __init
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jensen_init_irq(void)
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{
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init_i8259a_irqs();
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irq_desc[1].chip = &jensen_local_irq_type;
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irq_desc[4].chip = &jensen_local_irq_type;
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irq_desc[3].chip = &jensen_local_irq_type;
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irq_desc[7].chip = &jensen_local_irq_type;
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irq_desc[9].chip = &jensen_local_irq_type;
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common_init_isa_dma();
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}
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static void __init
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jensen_init_arch(void)
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{
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struct pci_controller *hose;
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#ifdef CONFIG_PCI
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static struct pci_dev fake_isa_bridge = { .dma_mask = 0xffffffffUL, };
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isa_bridge = &fake_isa_bridge;
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#endif
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/* Create a hose so that we can report i/o base addresses to
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userland. */
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pci_isa_hose = hose = alloc_pci_controller();
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hose->io_space = &ioport_resource;
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hose->mem_space = &iomem_resource;
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hose->index = 0;
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hose->sparse_mem_base = EISA_MEM - IDENT_ADDR;
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hose->dense_mem_base = 0;
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hose->sparse_io_base = EISA_IO - IDENT_ADDR;
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hose->dense_io_base = 0;
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hose->sg_isa = hose->sg_pci = NULL;
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__direct_map_base = 0;
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__direct_map_size = 0xffffffff;
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}
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static void
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jensen_machine_check(unsigned long vector, unsigned long la)
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{
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printk(KERN_CRIT "Machine check\n");
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}
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/*
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* The System Vector
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*/
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struct alpha_machine_vector jensen_mv __initmv = {
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.vector_name = "Jensen",
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DO_EV4_MMU,
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IO_LITE(JENSEN,jensen),
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.machine_check = jensen_machine_check,
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.max_isa_dma_address = ALPHA_MAX_ISA_DMA_ADDRESS,
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.rtc_port = 0x170,
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.rtc_get_time = common_get_rtc_time,
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.rtc_set_time = common_set_rtc_time,
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.nr_irqs = 16,
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.device_interrupt = jensen_device_interrupt,
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.init_arch = jensen_init_arch,
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.init_irq = jensen_init_irq,
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.init_rtc = common_init_rtc,
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.init_pci = NULL,
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.kill_arch = NULL,
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};
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ALIAS_MV(jensen)
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