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