LXR linux/arch/alpha/kernel/sys

   1/*
   2 *      linux/arch/alpha/kernel/sys_sx164.c
   3 *
   4 *      Copyright (C) 1995 David A Rusling
   5 *      Copyright (C) 1996 Jay A Estabrook
   6 *      Copyright (C) 1998, 1999, 2000 Richard Henderson
   7 *
   8 * Code supporting the SX164 (PCA56+PYXIS).
   9 */
  10
  11#include <linux/kernel.h>
  12#include <linux/types.h>
  13#include <linux/mm.h>
  14#include <linux/sched.h>
  15#include <linux/pci.h>
  16#include <linux/init.h>
  17#include <linux/bitops.h>
  18
  19#include <asm/ptrace.h>
  20#include <asm/dma.h>
  21#include <asm/irq.h>
  22#include <asm/mmu_context.h>
  23#include <asm/io.h>
  24#include <asm/pgtable.h>
  25#include <asm/core_cia.h>
  26#include <asm/hwrpb.h>
  27#include <asm/tlbflush.h>
  28#include <asm/special_insns.h>
  29
  30#include "proto.h"
  31#include "irq_impl.h"
  32#include "pci_impl.h"
  33#include "machvec_impl.h"
  34
  35
  36static void __init
  37sx164_init_irq(void)
  38{
  39        outb(0, DMA1_RESET_REG);
  40        outb(0, DMA2_RESET_REG);
  41        outb(DMA_MODE_CASCADE, DMA2_MODE_REG);
  42        outb(0, DMA2_MASK_REG);
  43
  44        if (alpha_using_srm)
  45                alpha_mv.device_interrupt = srm_device_interrupt;
  46
  47        init_i8259a_irqs();
  48
  49        /* Not interested in the bogus interrupts (0,3,4,5,40-47),
  50           NMI (1), or HALT (2).  */
  51        if (alpha_using_srm)
  52                init_srm_irqs(40, 0x3f0000);
  53        else
  54                init_pyxis_irqs(0xff00003f0000UL);
  55
  56        setup_irq(16+6, &timer_cascade_irqaction);
  57}
  58
  59/*
  60 * PCI Fixup configuration.
  61 *
  62 * Summary @ PYXIS_INT_REQ:
  63 * Bit      Meaning
  64 * 0        RSVD
  65 * 1        NMI
  66 * 2        Halt/Reset switch
  67 * 3        MBZ
  68 * 4        RAZ
  69 * 5        RAZ
  70 * 6        Interval timer (RTC)
  71 * 7        PCI-ISA Bridge
  72 * 8        Interrupt Line A from slot 3
  73 * 9        Interrupt Line A from slot 2
  74 *10        Interrupt Line A from slot 1
  75 *11        Interrupt Line A from slot 0
  76 *12        Interrupt Line B from slot 3
  77 *13        Interrupt Line B from slot 2
  78 *14        Interrupt Line B from slot 1
  79 *15        Interrupt line B from slot 0
  80 *16        Interrupt Line C from slot 3
  81 *17        Interrupt Line C from slot 2
  82 *18        Interrupt Line C from slot 1
  83 *19        Interrupt Line C from slot 0
  84 *20        Interrupt Line D from slot 3
  85 *21        Interrupt Line D from slot 2
  86 *22        Interrupt Line D from slot 1
  87 *23        Interrupt Line D from slot 0
  88 *
  89 * IdSel       
  90 *   5  32 bit PCI option slot 2
  91 *   6  64 bit PCI option slot 0
  92 *   7  64 bit PCI option slot 1
  93 *   8  Cypress I/O
  94 *   9  32 bit PCI option slot 3
  95 */
  96
  97static int __init
  98sx164_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
  99{
 100        static char irq_tab[5][5] __initdata = {
 101                /*INT    INTA   INTB   INTC   INTD */
 102                { 16+ 9, 16+ 9, 16+13, 16+17, 16+21}, /* IdSel 5 slot 2 J17 */
 103                { 16+11, 16+11, 16+15, 16+19, 16+23}, /* IdSel 6 slot 0 J19 */
 104                { 16+10, 16+10, 16+14, 16+18, 16+22}, /* IdSel 7 slot 1 J18 */
 105                {    -1,    -1,    -1,    -1,    -1}, /* IdSel 8 SIO        */
 106                { 16+ 8, 16+ 8, 16+12, 16+16, 16+20}  /* IdSel 9 slot 3 J15 */
 107        };
 108        const long min_idsel = 5, max_idsel = 9, irqs_per_slot = 5;
 109        return COMMON_TABLE_LOOKUP;
 110}
 111
 112static void __init
 113sx164_init_pci(void)
 114{
 115        cia_init_pci();
 116        SMC669_Init(0);
 117}
 118
 119static void __init
 120sx164_init_arch(void)
 121{
 122        /*
 123         * OSF palcode v1.23 forgets to enable PCA56 Motion Video
 124         * Instructions. Let's enable it.
 125         * We have to check palcode revision because CSERVE interface
 126         * is subject to change without notice. For example, it
 127         * has been changed completely since v1.16 (found in MILO
 128         * distribution). -ink
 129         */
 130        struct percpu_struct *cpu = (struct percpu_struct*)
 131                ((char*)hwrpb + hwrpb->processor_offset);
 132
 133        if (amask(AMASK_MAX) != 0
 134            && alpha_using_srm
 135            && (cpu->pal_revision & 0xffff) <= 0x117) {
 136                __asm__ __volatile__(
 137                "lda    $16,8($31)\n"
 138                "call_pal 9\n"          /* Allow PALRES insns in kernel mode */
 139                ".long  0x64000118\n\n" /* hw_mfpr $0,icsr */
 140                "ldah   $16,(1<<(19-16))($31)\n"
 141                "or     $0,$16,$0\n"    /* set MVE bit */
 142                ".long  0x74000118\n"   /* hw_mtpr $0,icsr */
 143                "lda    $16,9($31)\n"
 144                "call_pal 9"            /* Disable PALRES insns */
 145                : : : "$0", "$16");
 146                printk("PCA56 MVI set enabled\n");
 147        }
 148
 149        pyxis_init_arch();
 150}
 151
 152/*
 153 * The System Vector
 154 */
 155
 156struct alpha_machine_vector sx164_mv __initmv = {
 157        .vector_name            = "SX164",
 158        DO_EV5_MMU,
 159        DO_DEFAULT_RTC,
 160        DO_PYXIS_IO,
 161        .machine_check          = cia_machine_check,
 162        .max_isa_dma_address    = ALPHA_MAX_ISA_DMA_ADDRESS,
 163        .min_io_address         = DEFAULT_IO_BASE,
 164        .min_mem_address        = DEFAULT_MEM_BASE,
 165        .pci_dac_offset         = PYXIS_DAC_OFFSET,
 166
 167        .nr_irqs                = 48,
 168        .device_interrupt       = pyxis_device_interrupt,
 169
 170        .init_arch              = sx164_init_arch,
 171        .init_irq               = sx164_init_irq,
 172        .init_rtc               = common_init_rtc,
 173        .init_pci               = sx164_init_pci,
 174        .kill_arch              = cia_kill_arch,
 175        .pci_map_irq            = sx164_map_irq,
 176        .pci_swizzle            = common_swizzle,
 177};
 178ALIAS_MV(sx164)
 179