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179 lines
4.5 KiB
179 lines
4.5 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* linux/arch/alpha/kernel/sys_sx164.c |
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* |
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* Copyright (C) 1995 David A Rusling |
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* Copyright (C) 1996 Jay A Estabrook |
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* Copyright (C) 1998, 1999, 2000 Richard Henderson |
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* |
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* Code supporting the SX164 (PCA56+PYXIS). |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/types.h> |
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#include <linux/mm.h> |
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#include <linux/sched.h> |
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#include <linux/pci.h> |
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#include <linux/init.h> |
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#include <linux/bitops.h> |
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#include <asm/ptrace.h> |
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#include <asm/dma.h> |
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#include <asm/irq.h> |
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#include <asm/mmu_context.h> |
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#include <asm/io.h> |
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#include <asm/core_cia.h> |
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#include <asm/hwrpb.h> |
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#include <asm/tlbflush.h> |
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#include <asm/special_insns.h> |
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#include "proto.h" |
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#include "irq_impl.h" |
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#include "pci_impl.h" |
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#include "machvec_impl.h" |
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static void __init |
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sx164_init_irq(void) |
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{ |
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outb(0, DMA1_RESET_REG); |
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outb(0, DMA2_RESET_REG); |
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outb(DMA_MODE_CASCADE, DMA2_MODE_REG); |
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outb(0, DMA2_MASK_REG); |
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if (alpha_using_srm) |
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alpha_mv.device_interrupt = srm_device_interrupt; |
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init_i8259a_irqs(); |
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/* Not interested in the bogus interrupts (0,3,4,5,40-47), |
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NMI (1), or HALT (2). */ |
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if (alpha_using_srm) |
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init_srm_irqs(40, 0x3f0000); |
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else |
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init_pyxis_irqs(0xff00003f0000UL); |
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if (request_irq(16 + 6, no_action, 0, "timer-cascade", NULL)) |
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pr_err("Failed to register timer-cascade interrupt\n"); |
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} |
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/* |
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* PCI Fixup configuration. |
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* |
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* Summary @ PYXIS_INT_REQ: |
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* Bit Meaning |
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* 0 RSVD |
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* 1 NMI |
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* 2 Halt/Reset switch |
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* 3 MBZ |
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* 4 RAZ |
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* 5 RAZ |
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* 6 Interval timer (RTC) |
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* 7 PCI-ISA Bridge |
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* 8 Interrupt Line A from slot 3 |
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* 9 Interrupt Line A from slot 2 |
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*10 Interrupt Line A from slot 1 |
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*11 Interrupt Line A from slot 0 |
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*12 Interrupt Line B from slot 3 |
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*13 Interrupt Line B from slot 2 |
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*14 Interrupt Line B from slot 1 |
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*15 Interrupt line B from slot 0 |
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*16 Interrupt Line C from slot 3 |
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*17 Interrupt Line C from slot 2 |
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*18 Interrupt Line C from slot 1 |
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*19 Interrupt Line C from slot 0 |
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*20 Interrupt Line D from slot 3 |
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*21 Interrupt Line D from slot 2 |
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*22 Interrupt Line D from slot 1 |
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*23 Interrupt Line D from slot 0 |
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* |
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* IdSel |
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* 5 32 bit PCI option slot 2 |
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* 6 64 bit PCI option slot 0 |
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* 7 64 bit PCI option slot 1 |
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* 8 Cypress I/O |
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* 9 32 bit PCI option slot 3 |
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*/ |
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static int |
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sx164_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) |
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{ |
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static char irq_tab[5][5] = { |
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/*INT INTA INTB INTC INTD */ |
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{ 16+ 9, 16+ 9, 16+13, 16+17, 16+21}, /* IdSel 5 slot 2 J17 */ |
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{ 16+11, 16+11, 16+15, 16+19, 16+23}, /* IdSel 6 slot 0 J19 */ |
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{ 16+10, 16+10, 16+14, 16+18, 16+22}, /* IdSel 7 slot 1 J18 */ |
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{ -1, -1, -1, -1, -1}, /* IdSel 8 SIO */ |
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{ 16+ 8, 16+ 8, 16+12, 16+16, 16+20} /* IdSel 9 slot 3 J15 */ |
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}; |
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const long min_idsel = 5, max_idsel = 9, irqs_per_slot = 5; |
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return COMMON_TABLE_LOOKUP; |
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} |
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static void __init |
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sx164_init_pci(void) |
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{ |
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cia_init_pci(); |
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SMC669_Init(0); |
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} |
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static void __init |
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sx164_init_arch(void) |
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{ |
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/* |
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* OSF palcode v1.23 forgets to enable PCA56 Motion Video |
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* Instructions. Let's enable it. |
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* We have to check palcode revision because CSERVE interface |
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* is subject to change without notice. For example, it |
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* has been changed completely since v1.16 (found in MILO |
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* distribution). -ink |
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*/ |
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struct percpu_struct *cpu = (struct percpu_struct*) |
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((char*)hwrpb + hwrpb->processor_offset); |
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if (amask(AMASK_MAX) != 0 |
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&& alpha_using_srm |
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&& (cpu->pal_revision & 0xffff) <= 0x117) { |
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__asm__ __volatile__( |
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"lda $16,8($31)\n" |
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"call_pal 9\n" /* Allow PALRES insns in kernel mode */ |
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".long 0x64000118\n\n" /* hw_mfpr $0,icsr */ |
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"ldah $16,(1<<(19-16))($31)\n" |
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"or $0,$16,$0\n" /* set MVE bit */ |
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".long 0x74000118\n" /* hw_mtpr $0,icsr */ |
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"lda $16,9($31)\n" |
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"call_pal 9" /* Disable PALRES insns */ |
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: : : "$0", "$16"); |
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printk("PCA56 MVI set enabled\n"); |
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} |
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pyxis_init_arch(); |
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} |
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/* |
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* The System Vector |
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*/ |
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struct alpha_machine_vector sx164_mv __initmv = { |
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.vector_name = "SX164", |
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DO_EV5_MMU, |
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DO_DEFAULT_RTC, |
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DO_PYXIS_IO, |
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.machine_check = cia_machine_check, |
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.max_isa_dma_address = ALPHA_MAX_ISA_DMA_ADDRESS, |
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.min_io_address = DEFAULT_IO_BASE, |
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.min_mem_address = DEFAULT_MEM_BASE, |
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.pci_dac_offset = PYXIS_DAC_OFFSET, |
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.nr_irqs = 48, |
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.device_interrupt = pyxis_device_interrupt, |
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.init_arch = sx164_init_arch, |
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.init_irq = sx164_init_irq, |
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.init_rtc = common_init_rtc, |
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.init_pci = sx164_init_pci, |
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.kill_arch = cia_kill_arch, |
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.pci_map_irq = sx164_map_irq, |
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.pci_swizzle = common_swizzle, |
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}; |
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ALIAS_MV(sx164)
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