sys_sx164.c
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上传日期:2013-02-24
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- /*
- * linux/arch/alpha/kernel/sys_sx164.c
- *
- * Copyright (C) 1995 David A Rusling
- * Copyright (C) 1996 Jay A Estabrook
- * Copyright (C) 1998, 1999, 2000 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_cia.h>
- #include <asm/hwrpb.h>
- #include "proto.h"
- #include "irq_impl.h"
- #include "pci_impl.h"
- #include "machvec_impl.h"
- static void __init
- 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.device_interrupt = srm_device_interrupt;
- init_i8259a_irqs();
- /* Not interested in the bogus interrupts (0,3,4,5,40-47),
- NMI (1), or HALT (2). */
- if (alpha_using_srm)
- init_srm_irqs(40, 0x3f0000);
- else
- init_pyxis_irqs(0xff00003f0000);
- setup_irq(16+6, &timer_cascade_irqaction);
- }
- /*
- * 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, u8 slot, u8 pin)
- {
- static char irq_tab[5][5] __initdata = {
- /*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;
- }
- static void __init
- sx164_init_pci(void)
- {
- cia_init_pci();
- SMC669_Init(0);
- }
- static void __init
- sx164_init_arch(void)
- {
- /*
- * OSF palcode v1.23 forgets to enable PCA56 Motion Video
- * Instructions. Let's enable it.
- * We have to check palcode revision because CSERVE interface
- * is subject to change without notice. For example, it
- * has been changed completely since v1.16 (found in MILO
- * distribution). -ink
- */
- struct percpu_struct *cpu = (struct percpu_struct*)
- ((char*)hwrpb + hwrpb->processor_offset);
- if (amask(AMASK_MAX) != 0
- && alpha_using_srm
- && (cpu->pal_revision & 0xffff) == 0x117) {
- __asm__ __volatile__(
- "lda $16,8($31)n"
- "call_pal 9n" /* Allow PALRES insns in kernel mode */
- ".long 0x64000118nn" /* hw_mfpr $0,icsr */
- "ldah $16,(1<<(19-16))($31)n"
- "or $0,$16,$0n" /* set MVE bit */
- ".long 0x74000118n" /* hw_mtpr $0,icsr */
- "lda $16,9($31)n"
- "call_pal 9" /* Disable PALRES insns */
- : : : "$0", "$16");
- printk("PCA56 MVI set enabledn");
- }
- pyxis_init_arch();
- }
- /*
- * The System Vector
- */
- struct alpha_machine_vector sx164_mv __initmv = {
- vector_name: "SX164",
- DO_EV5_MMU,
- DO_DEFAULT_RTC,
- DO_PYXIS_IO,
- DO_CIA_BUS,
- machine_check: cia_machine_check,
- max_dma_address: ALPHA_MAX_DMA_ADDRESS,
- min_io_address: DEFAULT_IO_BASE,
- min_mem_address: DEFAULT_MEM_BASE,
- pci_dac_offset: PYXIS_DAC_OFFSET,
- nr_irqs: 48,
- device_interrupt: pyxis_device_interrupt,
- init_arch: sx164_init_arch,
- init_irq: sx164_init_irq,
- init_rtc: common_init_rtc,
- init_pci: sx164_init_pci,
- kill_arch: NULL,
- pci_map_irq: sx164_map_irq,
- pci_swizzle: common_swizzle,
- };
- ALIAS_MV(sx164)