1// SPDX-License-Identifier: GPL-2.0 2/* 3 * linux/arch/alpha/kernel/sys_sx164.c 4 * 5 * Copyright (C) 1995 David A Rusling 6 * Copyright (C) 1996 Jay A Estabrook 7 * Copyright (C) 1998, 1999, 2000 Richard Henderson 8 * 9 * Code supporting the SX164 (PCA56+PYXIS). 10 */ 11 12#include <linux/kernel.h> 13#include <linux/types.h> 14#include <linux/mm.h> 15#include <linux/sched.h> 16#include <linux/pci.h> 17#include <linux/init.h> 18#include <linux/bitops.h> 19 20#include <asm/ptrace.h> 21#include <asm/dma.h> 22#include <asm/irq.h> 23#include <asm/mmu_context.h> 24#include <asm/io.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 if (request_irq(16 + 6, no_action, 0, "timer-cascade", NULL)) 57 pr_err("Failed to register timer-cascade interrupt\n"); 58} 59 60/* 61 * PCI Fixup configuration. 62 * 63 * Summary @ PYXIS_INT_REQ: 64 * Bit Meaning 65 * 0 RSVD 66 * 1 NMI 67 * 2 Halt/Reset switch 68 * 3 MBZ 69 * 4 RAZ 70 * 5 RAZ 71 * 6 Interval timer (RTC) 72 * 7 PCI-ISA Bridge 73 * 8 Interrupt Line A from slot 3 74 * 9 Interrupt Line A from slot 2 75 *10 Interrupt Line A from slot 1 76 *11 Interrupt Line A from slot 0 77 *12 Interrupt Line B from slot 3 78 *13 Interrupt Line B from slot 2 79 *14 Interrupt Line B from slot 1 80 *15 Interrupt line B from slot 0 81 *16 Interrupt Line C from slot 3 82 *17 Interrupt Line C from slot 2 83 *18 Interrupt Line C from slot 1 84 *19 Interrupt Line C from slot 0 85 *20 Interrupt Line D from slot 3 86 *21 Interrupt Line D from slot 2 87 *22 Interrupt Line D from slot 1 88 *23 Interrupt Line D from slot 0 89 * 90 * IdSel 91 * 5 32 bit PCI option slot 2 92 * 6 64 bit PCI option slot 0 93 * 7 64 bit PCI option slot 1 94 * 8 Cypress I/O 95 * 9 32 bit PCI option slot 3 96 */ 97 98static int 99sx164_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) 100{ 101 static char irq_tab[5][5] = { 102 /*INT INTA INTB INTC INTD */ 103 { 16+ 9, 16+ 9, 16+13, 16+17, 16+21}, /* IdSel 5 slot 2 J17 */ 104 { 16+11, 16+11, 16+15, 16+19, 16+23}, /* IdSel 6 slot 0 J19 */ 105 { 16+10, 16+10, 16+14, 16+18, 16+22}, /* IdSel 7 slot 1 J18 */ 106 { -1, -1, -1, -1, -1}, /* IdSel 8 SIO */ 107 { 16+ 8, 16+ 8, 16+12, 16+16, 16+20} /* IdSel 9 slot 3 J15 */ 108 }; 109 const long min_idsel = 5, max_idsel = 9, irqs_per_slot = 5; 110 return COMMON_TABLE_LOOKUP; 111} 112 113static void __init 114sx164_init_pci(void) 115{ 116 cia_init_pci(); 117 SMC669_Init(0); 118} 119 120static void __init 121sx164_init_arch(void) 122{ 123 /* 124 * OSF palcode v1.23 forgets to enable PCA56 Motion Video 125 * Instructions. Let's enable it. 126 * We have to check palcode revision because CSERVE interface 127 * is subject to change without notice. For example, it 128 * has been changed completely since v1.16 (found in MILO 129 * distribution). -ink 130 */ 131 struct percpu_struct *cpu = (struct percpu_struct*) 132 ((char*)hwrpb + hwrpb->processor_offset); 133 134 if (amask(AMASK_MAX) != 0 135 && alpha_using_srm 136 && (cpu->pal_revision & 0xffff) <= 0x117) { 137 __asm__ __volatile__( 138 "lda $16,8($31)\n" 139 "call_pal 9\n" /* Allow PALRES insns in kernel mode */ 140 ".long 0x64000118\n\n" /* hw_mfpr $0,icsr */ 141 "ldah $16,(1<<(19-16))($31)\n" 142 "or $0,$16,$0\n" /* set MVE bit */ 143 ".long 0x74000118\n" /* hw_mtpr $0,icsr */ 144 "lda $16,9($31)\n" 145 "call_pal 9" /* Disable PALRES insns */ 146 : : : "$0", "$16"); 147 printk("PCA56 MVI set enabled\n"); 148 } 149 150 pyxis_init_arch(); 151} 152 153/* 154 * The System Vector 155 */ 156 157struct alpha_machine_vector sx164_mv __initmv = { 158 .vector_name = "SX164", 159 DO_EV5_MMU, 160 DO_DEFAULT_RTC, 161 DO_PYXIS_IO, 162 .machine_check = cia_machine_check, 163 .max_isa_dma_address = ALPHA_MAX_ISA_DMA_ADDRESS, 164 .min_io_address = DEFAULT_IO_BASE, 165 .min_mem_address = DEFAULT_MEM_BASE, 166 .pci_dac_offset = PYXIS_DAC_OFFSET, 167 168 .nr_irqs = 48, 169 .device_interrupt = pyxis_device_interrupt, 170 171 .init_arch = sx164_init_arch, 172 .init_irq = sx164_init_irq, 173 .init_rtc = common_init_rtc, 174 .init_pci = sx164_init_pci, 175 .kill_arch = cia_kill_arch, 176 .pci_map_irq = sx164_map_irq, 177 .pci_swizzle = common_swizzle, 178}; 179ALIAS_MV(sx164) 180