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/system.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/pgtable.h> 26 #include <asm/core_cia.h> 27 #include <asm/hwrpb.h> 28 #include <asm/tlbflush.h> 29 30 #include "proto.h" 31 #include "irq_impl.h" 32 #include "pci_impl.h" 33 #include "machvec_impl.h" 34 35 36 static void __init 37 sx164_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 97 static int __init 98 sx164_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 } 111 112 static void __init 113 sx164_init_pci(void) 114 { 115 cia_init_pci(); 116 SMC669_Init(0); 117 } 118 119 static void __init 120 sx164_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 */ 155 156 struct 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 }; 178 ALIAS_MV(sx164) 179