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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>
263 lines
6.2 KiB
C
263 lines
6.2 KiB
C
/*
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* linux/arch/alpha/kernel/sys_mikasa.c
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*
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* Copyright (C) 1995 David A Rusling
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* Copyright (C) 1996 Jay A Estabrook
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* Copyright (C) 1998, 1999 Richard Henderson
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*
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* Code supporting the MIKASA (AlphaServer 1000).
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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 <linux/bitops.h>
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#include <asm/ptrace.h>
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#include <asm/system.h>
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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/io.h>
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#include <asm/pgtable.h>
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#include <asm/core_apecs.h>
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#include <asm/core_cia.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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/* Note mask bit is true for ENABLED irqs. */
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static int cached_irq_mask;
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static inline void
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mikasa_update_irq_hw(int mask)
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{
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outw(mask, 0x536);
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}
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static inline void
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mikasa_enable_irq(unsigned int irq)
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{
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mikasa_update_irq_hw(cached_irq_mask |= 1 << (irq - 16));
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}
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static void
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mikasa_disable_irq(unsigned int irq)
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{
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mikasa_update_irq_hw(cached_irq_mask &= ~(1 << (irq - 16)));
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}
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static unsigned int
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mikasa_startup_irq(unsigned int irq)
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{
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mikasa_enable_irq(irq);
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return 0;
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}
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static void
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mikasa_end_irq(unsigned int irq)
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{
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if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
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mikasa_enable_irq(irq);
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}
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static struct irq_chip mikasa_irq_type = {
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.typename = "MIKASA",
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.startup = mikasa_startup_irq,
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.shutdown = mikasa_disable_irq,
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.enable = mikasa_enable_irq,
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.disable = mikasa_disable_irq,
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.ack = mikasa_disable_irq,
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.end = mikasa_end_irq,
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};
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static void
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mikasa_device_interrupt(unsigned long vector)
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{
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unsigned long pld;
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unsigned int i;
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/* Read the interrupt summary registers */
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pld = (((~inw(0x534) & 0x0000ffffUL) << 16)
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| (((unsigned long) inb(0xa0)) << 8)
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| inb(0x20));
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/*
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* Now for every possible bit set, work through them and call
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* the appropriate interrupt handler.
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*/
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while (pld) {
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i = ffz(~pld);
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pld &= pld - 1; /* clear least bit set */
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if (i < 16) {
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isa_device_interrupt(vector);
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} else {
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handle_irq(i);
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}
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}
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}
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static void __init
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mikasa_init_irq(void)
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{
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long i;
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if (alpha_using_srm)
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alpha_mv.device_interrupt = srm_device_interrupt;
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mikasa_update_irq_hw(0);
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for (i = 16; i < 32; ++i) {
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irq_desc[i].status = IRQ_DISABLED | IRQ_LEVEL;
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irq_desc[i].chip = &mikasa_irq_type;
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}
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init_i8259a_irqs();
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common_init_isa_dma();
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}
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/*
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* PCI Fixup configuration.
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*
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* Summary @ 0x536:
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* Bit Meaning
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* 0 Interrupt Line A from slot 0
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* 1 Interrupt Line B from slot 0
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* 2 Interrupt Line C from slot 0
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* 3 Interrupt Line D from slot 0
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* 4 Interrupt Line A from slot 1
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* 5 Interrupt line B from slot 1
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* 6 Interrupt Line C from slot 1
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* 7 Interrupt Line D from slot 1
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* 8 Interrupt Line A from slot 2
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* 9 Interrupt Line B from slot 2
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*10 Interrupt Line C from slot 2
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*11 Interrupt Line D from slot 2
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*12 NCR 810 SCSI
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*13 Power Supply Fail
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*14 Temperature Warn
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*15 Reserved
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*
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* The device to slot mapping looks like:
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*
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* Slot Device
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* 6 NCR SCSI controller
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* 7 Intel PCI-EISA bridge chip
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* 11 PCI on board slot 0
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* 12 PCI on board slot 1
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* 13 PCI on board slot 2
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*
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*
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* This two layered interrupt approach means that we allocate IRQ 16 and
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* above for PCI interrupts. The IRQ relates to which bit the interrupt
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* comes in on. This makes interrupt processing much easier.
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*/
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static int __init
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mikasa_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
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{
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static char irq_tab[8][5] __initdata = {
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/*INT INTA INTB INTC INTD */
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{16+12, 16+12, 16+12, 16+12, 16+12}, /* IdSel 17, SCSI */
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{ -1, -1, -1, -1, -1}, /* IdSel 18, PCEB */
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{ -1, -1, -1, -1, -1}, /* IdSel 19, ???? */
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{ -1, -1, -1, -1, -1}, /* IdSel 20, ???? */
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{ -1, -1, -1, -1, -1}, /* IdSel 21, ???? */
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{ 16+0, 16+0, 16+1, 16+2, 16+3}, /* IdSel 22, slot 0 */
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{ 16+4, 16+4, 16+5, 16+6, 16+7}, /* IdSel 23, slot 1 */
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{ 16+8, 16+8, 16+9, 16+10, 16+11}, /* IdSel 24, slot 2 */
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};
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const long min_idsel = 6, max_idsel = 13, irqs_per_slot = 5;
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return COMMON_TABLE_LOOKUP;
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}
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#if defined(CONFIG_ALPHA_GENERIC) || !defined(CONFIG_ALPHA_PRIMO)
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static void
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mikasa_apecs_machine_check(unsigned long vector, unsigned long la_ptr)
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{
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#define MCHK_NO_DEVSEL 0x205U
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#define MCHK_NO_TABT 0x204U
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struct el_common *mchk_header;
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unsigned int code;
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mchk_header = (struct el_common *)la_ptr;
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/* Clear the error before any reporting. */
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mb();
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mb(); /* magic */
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draina();
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apecs_pci_clr_err();
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wrmces(0x7);
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mb();
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code = mchk_header->code;
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process_mcheck_info(vector, la_ptr, "MIKASA APECS",
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(mcheck_expected(0)
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&& (code == MCHK_NO_DEVSEL
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|| code == MCHK_NO_TABT)));
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}
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#endif
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/*
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* The System Vector
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*/
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#if defined(CONFIG_ALPHA_GENERIC) || !defined(CONFIG_ALPHA_PRIMO)
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struct alpha_machine_vector mikasa_mv __initmv = {
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.vector_name = "Mikasa",
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DO_EV4_MMU,
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DO_DEFAULT_RTC,
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DO_APECS_IO,
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.machine_check = mikasa_apecs_machine_check,
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.max_isa_dma_address = ALPHA_MAX_ISA_DMA_ADDRESS,
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.min_io_address = DEFAULT_IO_BASE,
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.min_mem_address = APECS_AND_LCA_DEFAULT_MEM_BASE,
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.nr_irqs = 32,
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.device_interrupt = mikasa_device_interrupt,
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.init_arch = apecs_init_arch,
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.init_irq = mikasa_init_irq,
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.init_rtc = common_init_rtc,
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.init_pci = common_init_pci,
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.pci_map_irq = mikasa_map_irq,
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.pci_swizzle = common_swizzle,
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};
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ALIAS_MV(mikasa)
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#endif
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#if defined(CONFIG_ALPHA_GENERIC) || defined(CONFIG_ALPHA_PRIMO)
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struct alpha_machine_vector mikasa_primo_mv __initmv = {
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.vector_name = "Mikasa-Primo",
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DO_EV5_MMU,
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DO_DEFAULT_RTC,
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DO_CIA_IO,
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.machine_check = cia_machine_check,
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.max_isa_dma_address = ALPHA_MAX_ISA_DMA_ADDRESS,
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.min_io_address = DEFAULT_IO_BASE,
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.min_mem_address = CIA_DEFAULT_MEM_BASE,
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.nr_irqs = 32,
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.device_interrupt = mikasa_device_interrupt,
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.init_arch = cia_init_arch,
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.init_irq = mikasa_init_irq,
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.init_rtc = common_init_rtc,
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.init_pci = cia_init_pci,
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.kill_arch = cia_kill_arch,
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.pci_map_irq = mikasa_map_irq,
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.pci_swizzle = common_swizzle,
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};
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ALIAS_MV(mikasa_primo)
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#endif
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