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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 | /* * linux/arch/alpha/kernel/sys_sx164.c * * Copyright (C) 1995 David A Rusling * Copyright (C) 1996 Jay A Estabrook * Copyright (C) 1998 Richard Henderson * * Code supporting the SX164 (PCA56+PYXIS). */ #include <linux/kernel.h> #include <linux/types.h> #include <linux/mm.h> #include <linux/sched.h> #include <linux/pci.h> #include <linux/init.h> #include <asm/ptrace.h> #include <asm/system.h> #include <asm/dma.h> #include <asm/irq.h> #include <asm/bitops.h> #include <asm/mmu_context.h> #include <asm/io.h> #include <asm/pgtable.h> #include <asm/core_pyxis.h> #include "proto.h" #include "irq.h" #include "bios32.h" #include "machvec.h" static void sx164_update_irq_hw(unsigned long irq, unsigned long mask, int unmask_p) { if (irq >= 16) { /* Make CERTAIN none of the bogus ints get enabled */ *(vulp)PYXIS_INT_MASK = ~((long)mask >> 16) & ~0x000000000000003bUL; mb(); /* ... and read it back to make sure it got written. */ *(vulp)PYXIS_INT_MASK; } else if (irq >= 8) outb(mask >> 8, 0xA1); /* ISA PIC2 */ else outb(mask, 0x21); /* ISA PIC1 */ } static void sx164_srm_update_irq_hw(unsigned long irq, unsigned long mask, int unmask_p) { if (irq >= 16) { if (unmask_p) cserve_ena(irq - 16); else cserve_dis(irq - 16); } else if (irq >= 8) outb(mask >> 8, 0xA1); /* ISA PIC2 */ else outb(mask, 0x21); /* ISA PIC1 */ } static void sx164_device_interrupt(unsigned long vector, struct pt_regs *regs) { unsigned long pld, tmp; unsigned int i; /* Read the interrupt summary register of PYXIS */ pld = *(vulp)PYXIS_INT_REQ; /* * For now, AND off any bits we are not interested in: * HALT (2), timer (6), ISA Bridge (7) * then all the PCI slots/INTXs (8-23) */ /* Maybe HALT should only be used for SRM console boots? */ pld &= 0x0000000000ffffc0UL; /* * Now for every possible bit set, work through them and call * the appropriate interrupt handler. */ while (pld) { i = ffz(~pld); pld &= pld - 1; /* clear least bit set */ if (i == 7) { isa_device_interrupt(vector, regs); } else if (i == 6) { continue; } else { /* if not timer int */ handle_irq(16 + i, 16 + i, regs); } *(vulp)PYXIS_INT_REQ = 1UL << i; mb(); tmp = *(vulp)PYXIS_INT_REQ; } } static void sx164_init_irq(void) { outb(0, DMA1_RESET_REG); outb(0, DMA2_RESET_REG); outb(DMA_MODE_CASCADE, DMA2_MODE_REG); outb(0, DMA2_MASK_REG); if (alpha_using_srm) { alpha_mv.update_irq_hw = sx164_srm_update_irq_hw; alpha_mv.device_interrupt = srm_device_interrupt; } else { /* Note invert on MASK bits. */ *(vulp)PYXIS_INT_MASK = ~((long)alpha_irq_mask >> 16); mb(); *(vulp)PYXIS_INT_MASK; } enable_irq(16 + 6); /* enable timer */ enable_irq(16 + 7); /* enable ISA PIC cascade */ enable_irq(2); /* enable cascade */ } /* * PCI Fixup configuration. * * Summary @ PYXIS_INT_REQ: * Bit Meaning * 0 RSVD * 1 NMI * 2 Halt/Reset switch * 3 MBZ * 4 RAZ * 5 RAZ * 6 Interval timer (RTC) * 7 PCI-ISA Bridge * 8 Interrupt Line A from slot 3 * 9 Interrupt Line A from slot 2 *10 Interrupt Line A from slot 1 *11 Interrupt Line A from slot 0 *12 Interrupt Line B from slot 3 *13 Interrupt Line B from slot 2 *14 Interrupt Line B from slot 1 *15 Interrupt line B from slot 0 *16 Interrupt Line C from slot 3 *17 Interrupt Line C from slot 2 *18 Interrupt Line C from slot 1 *19 Interrupt Line C from slot 0 *20 Interrupt Line D from slot 3 *21 Interrupt Line D from slot 2 *22 Interrupt Line D from slot 1 *23 Interrupt Line D from slot 0 * * IdSel * 5 32 bit PCI option slot 2 * 6 64 bit PCI option slot 0 * 7 64 bit PCI option slot 1 * 8 Cypress I/O * 9 32 bit PCI option slot 3 * */ static int __init sx164_map_irq(struct pci_dev *dev, int slot, int pin) { static char irq_tab[5][5] __initlocaldata = { /*INT INTA INTB INTC INTD */ { 16+ 9, 16+ 9, 16+13, 16+17, 16+21}, /* IdSel 5 slot 2 J17 */ { 16+11, 16+11, 16+15, 16+19, 16+23}, /* IdSel 6 slot 0 J19 */ { 16+10, 16+10, 16+14, 16+18, 16+22}, /* IdSel 7 slot 1 J18 */ { -1, -1, -1, -1, -1}, /* IdSel 8 SIO */ { 16+ 8, 16+ 8, 16+12, 16+16, 16+20} /* IdSel 9 slot 3 J15 */ }; const long min_idsel = 5, max_idsel = 9, irqs_per_slot = 5; return COMMON_TABLE_LOOKUP; } void __init sx164_pci_fixup(void) { layout_all_busses(DEFAULT_IO_BASE, DEFAULT_MEM_BASE); common_pci_fixup(sx164_map_irq, common_swizzle); SMC669_Init(); } /* * The System Vector */ struct alpha_machine_vector sx164_mv __initmv = { vector_name: "SX164", DO_EV5_MMU, DO_DEFAULT_RTC, DO_PYXIS_IO, DO_PYXIS_BUS, machine_check: pyxis_machine_check, max_dma_address: ALPHA_MAX_DMA_ADDRESS, nr_irqs: 40, irq_probe_mask: _PROBE_MASK(40), update_irq_hw: sx164_update_irq_hw, ack_irq: generic_ack_irq, device_interrupt: sx164_device_interrupt, init_arch: pyxis_init_arch, init_irq: sx164_init_irq, init_pit: generic_init_pit, pci_fixup: sx164_pci_fixup, kill_arch: generic_kill_arch, }; ALIAS_MV(sx164) |