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linux_dsm_epyc7002/arch/alpha/kernel/sys_dp264.c
Ivan Kokshaysky 997a51ae37 [PATCH] Alpha: ISA IRQs fixup for dp264 
Basically, this extends original dp264 fixup to all dp264 variations.
Here is one minor change: mask out bits 4-7 of a value assigned by SRM,
because
- newer consoles report ISA IRQs with offset 0xe0;
- even if console IRQ value is bogus, we'll have a value < 16
  so it should be harmless as it won't clash with native IRQs.

Particularly this fixes USB interrupt problem on xp1000 and es40.

Signed-off-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Acked-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-09-19 10:00:59 -07:00

695 lines
18 KiB
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/*
* linux/arch/alpha/kernel/sys_dp264.c
*
* Copyright (C) 1995 David A Rusling
* Copyright (C) 1996, 1999 Jay A Estabrook
* Copyright (C) 1998, 1999 Richard Henderson
*
* Modified by Christopher C. Chimelis, 2001 to
* add support for the addition of Shark to the
* Tsunami family.
*
* Code supporting the DP264 (EV6+TSUNAMI).
*/
#include <linux/config.h>
#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 <linux/bitops.h>
#include <asm/ptrace.h>
#include <asm/system.h>
#include <asm/dma.h>
#include <asm/irq.h>
#include <asm/mmu_context.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/core_tsunami.h>
#include <asm/hwrpb.h>
#include <asm/tlbflush.h>
#include "proto.h"
#include "irq_impl.h"
#include "pci_impl.h"
#include "machvec_impl.h"
/* Note mask bit is true for ENABLED irqs. */
static unsigned long cached_irq_mask;
/* dp264 boards handle at max four CPUs */
static unsigned long cpu_irq_affinity[4] = { 0UL, 0UL, 0UL, 0UL };
DEFINE_SPINLOCK(dp264_irq_lock);
static void
tsunami_update_irq_hw(unsigned long mask)
{
register tsunami_cchip *cchip = TSUNAMI_cchip;
unsigned long isa_enable = 1UL << 55;
register int bcpu = boot_cpuid;
#ifdef CONFIG_SMP
volatile unsigned long *dim0, *dim1, *dim2, *dim3;
unsigned long mask0, mask1, mask2, mask3, dummy;
mask &= ~isa_enable;
mask0 = mask & cpu_irq_affinity[0];
mask1 = mask & cpu_irq_affinity[1];
mask2 = mask & cpu_irq_affinity[2];
mask3 = mask & cpu_irq_affinity[3];
if (bcpu == 0) mask0 |= isa_enable;
else if (bcpu == 1) mask1 |= isa_enable;
else if (bcpu == 2) mask2 |= isa_enable;
else mask3 |= isa_enable;
dim0 = &cchip->dim0.csr;
dim1 = &cchip->dim1.csr;
dim2 = &cchip->dim2.csr;
dim3 = &cchip->dim3.csr;
if (!cpu_possible(0)) dim0 = &dummy;
if (!cpu_possible(1)) dim1 = &dummy;
if (!cpu_possible(2)) dim2 = &dummy;
if (!cpu_possible(3)) dim3 = &dummy;
*dim0 = mask0;
*dim1 = mask1;
*dim2 = mask2;
*dim3 = mask3;
mb();
*dim0;
*dim1;
*dim2;
*dim3;
#else
volatile unsigned long *dimB;
if (bcpu == 0) dimB = &cchip->dim0.csr;
else if (bcpu == 1) dimB = &cchip->dim1.csr;
else if (bcpu == 2) dimB = &cchip->dim2.csr;
else dimB = &cchip->dim3.csr;
*dimB = mask | isa_enable;
mb();
*dimB;
#endif
}
static void
dp264_enable_irq(unsigned int irq)
{
spin_lock(&dp264_irq_lock);
cached_irq_mask |= 1UL << irq;
tsunami_update_irq_hw(cached_irq_mask);
spin_unlock(&dp264_irq_lock);
}
static void
dp264_disable_irq(unsigned int irq)
{
spin_lock(&dp264_irq_lock);
cached_irq_mask &= ~(1UL << irq);
tsunami_update_irq_hw(cached_irq_mask);
spin_unlock(&dp264_irq_lock);
}
static unsigned int
dp264_startup_irq(unsigned int irq)
{
dp264_enable_irq(irq);
return 0; /* never anything pending */
}
static void
dp264_end_irq(unsigned int irq)
{
if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
dp264_enable_irq(irq);
}
static void
clipper_enable_irq(unsigned int irq)
{
spin_lock(&dp264_irq_lock);
cached_irq_mask |= 1UL << (irq - 16);
tsunami_update_irq_hw(cached_irq_mask);
spin_unlock(&dp264_irq_lock);
}
static void
clipper_disable_irq(unsigned int irq)
{
spin_lock(&dp264_irq_lock);
cached_irq_mask &= ~(1UL << (irq - 16));
tsunami_update_irq_hw(cached_irq_mask);
spin_unlock(&dp264_irq_lock);
}
static unsigned int
clipper_startup_irq(unsigned int irq)
{
clipper_enable_irq(irq);
return 0; /* never anything pending */
}
static void
clipper_end_irq(unsigned int irq)
{
if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
clipper_enable_irq(irq);
}
static void
cpu_set_irq_affinity(unsigned int irq, cpumask_t affinity)
{
int cpu;
for (cpu = 0; cpu < 4; cpu++) {
unsigned long aff = cpu_irq_affinity[cpu];
if (cpu_isset(cpu, affinity))
aff |= 1UL << irq;
else
aff &= ~(1UL << irq);
cpu_irq_affinity[cpu] = aff;
}
}
static void
dp264_set_affinity(unsigned int irq, cpumask_t affinity)
{
spin_lock(&dp264_irq_lock);
cpu_set_irq_affinity(irq, affinity);
tsunami_update_irq_hw(cached_irq_mask);
spin_unlock(&dp264_irq_lock);
}
static void
clipper_set_affinity(unsigned int irq, cpumask_t affinity)
{
spin_lock(&dp264_irq_lock);
cpu_set_irq_affinity(irq - 16, affinity);
tsunami_update_irq_hw(cached_irq_mask);
spin_unlock(&dp264_irq_lock);
}
static struct hw_interrupt_type dp264_irq_type = {
.typename = "DP264",
.startup = dp264_startup_irq,
.shutdown = dp264_disable_irq,
.enable = dp264_enable_irq,
.disable = dp264_disable_irq,
.ack = dp264_disable_irq,
.end = dp264_end_irq,
.set_affinity = dp264_set_affinity,
};
static struct hw_interrupt_type clipper_irq_type = {
.typename = "CLIPPER",
.startup = clipper_startup_irq,
.shutdown = clipper_disable_irq,
.enable = clipper_enable_irq,
.disable = clipper_disable_irq,
.ack = clipper_disable_irq,
.end = clipper_end_irq,
.set_affinity = clipper_set_affinity,
};
static void
dp264_device_interrupt(unsigned long vector, struct pt_regs * regs)
{
#if 1
printk("dp264_device_interrupt: NOT IMPLEMENTED YET!! \n");
#else
unsigned long pld;
unsigned int i;
/* Read the interrupt summary register of TSUNAMI */
pld = TSUNAMI_cchip->dir0.csr;
/*
* 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 == 55)
isa_device_interrupt(vector, regs);
else
handle_irq(16 + i, 16 + i, regs);
#if 0
TSUNAMI_cchip->dir0.csr = 1UL << i; mb();
tmp = TSUNAMI_cchip->dir0.csr;
#endif
}
#endif
}
static void
dp264_srm_device_interrupt(unsigned long vector, struct pt_regs * regs)
{
int irq;
irq = (vector - 0x800) >> 4;
/*
* The SRM console reports PCI interrupts with a vector calculated by:
*
* 0x900 + (0x10 * DRIR-bit)
*
* So bit 16 shows up as IRQ 32, etc.
*
* On DP264/BRICK/MONET, we adjust it down by 16 because at least
* that many of the low order bits of the DRIR are not used, and
* so we don't count them.
*/
if (irq >= 32)
irq -= 16;
handle_irq(irq, regs);
}
static void
clipper_srm_device_interrupt(unsigned long vector, struct pt_regs * regs)
{
int irq;
irq = (vector - 0x800) >> 4;
/*
* The SRM console reports PCI interrupts with a vector calculated by:
*
* 0x900 + (0x10 * DRIR-bit)
*
* So bit 16 shows up as IRQ 32, etc.
*
* CLIPPER uses bits 8-47 for PCI interrupts, so we do not need
* to scale down the vector reported, we just use it.
*
* Eg IRQ 24 is DRIR bit 8, etc, etc
*/
handle_irq(irq, regs);
}
static void __init
init_tsunami_irqs(struct hw_interrupt_type * ops, int imin, int imax)
{
long i;
for (i = imin; i <= imax; ++i) {
irq_desc[i].status = IRQ_DISABLED | IRQ_LEVEL;
irq_desc[i].handler = ops;
}
}
static void __init
dp264_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 = dp264_srm_device_interrupt;
tsunami_update_irq_hw(0);
init_i8259a_irqs();
init_tsunami_irqs(&dp264_irq_type, 16, 47);
}
static void __init
clipper_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 = clipper_srm_device_interrupt;
tsunami_update_irq_hw(0);
init_i8259a_irqs();
init_tsunami_irqs(&clipper_irq_type, 24, 63);
}
/*
* PCI Fixup configuration.
*
* Summary @ TSUNAMI_CSR_DIM0:
* Bit Meaning
* 0-17 Unused
*18 Interrupt SCSI B (Adaptec 7895 builtin)
*19 Interrupt SCSI A (Adaptec 7895 builtin)
*20 Interrupt Line D from slot 2 PCI0
*21 Interrupt Line C from slot 2 PCI0
*22 Interrupt Line B from slot 2 PCI0
*23 Interrupt Line A from slot 2 PCI0
*24 Interrupt Line D from slot 1 PCI0
*25 Interrupt Line C from slot 1 PCI0
*26 Interrupt Line B from slot 1 PCI0
*27 Interrupt Line A from slot 1 PCI0
*28 Interrupt Line D from slot 0 PCI0
*29 Interrupt Line C from slot 0 PCI0
*30 Interrupt Line B from slot 0 PCI0
*31 Interrupt Line A from slot 0 PCI0
*
*32 Interrupt Line D from slot 3 PCI1
*33 Interrupt Line C from slot 3 PCI1
*34 Interrupt Line B from slot 3 PCI1
*35 Interrupt Line A from slot 3 PCI1
*36 Interrupt Line D from slot 2 PCI1
*37 Interrupt Line C from slot 2 PCI1
*38 Interrupt Line B from slot 2 PCI1
*39 Interrupt Line A from slot 2 PCI1
*40 Interrupt Line D from slot 1 PCI1
*41 Interrupt Line C from slot 1 PCI1
*42 Interrupt Line B from slot 1 PCI1
*43 Interrupt Line A from slot 1 PCI1
*44 Interrupt Line D from slot 0 PCI1
*45 Interrupt Line C from slot 0 PCI1
*46 Interrupt Line B from slot 0 PCI1
*47 Interrupt Line A from slot 0 PCI1
*48-52 Unused
*53 PCI0 NMI (from Cypress)
*54 PCI0 SMI INT (from Cypress)
*55 PCI0 ISA Interrupt (from Cypress)
*56-60 Unused
*61 PCI1 Bus Error
*62 PCI0 Bus Error
*63 Reserved
*
* IdSel
* 5 Cypress Bridge I/O
* 6 SCSI Adaptec builtin
* 7 64 bit PCI option slot 0 (all busses)
* 8 64 bit PCI option slot 1 (all busses)
* 9 64 bit PCI option slot 2 (all busses)
* 10 64 bit PCI option slot 3 (not bus 0)
*/
static int __init
isa_irq_fixup(struct pci_dev *dev, int irq)
{
u8 irq8;
if (irq > 0)
return irq;
/* This interrupt is routed via ISA bridge, so we'll
just have to trust whatever value the console might
have assigned. */
pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &irq8);
return irq8 & 0xf;
}
static int __init
dp264_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
{
static char irq_tab[6][5] __initdata = {
/*INT INTA INTB INTC INTD */
{ -1, -1, -1, -1, -1}, /* IdSel 5 ISA Bridge */
{ 16+ 3, 16+ 3, 16+ 2, 16+ 2, 16+ 2}, /* IdSel 6 SCSI builtin*/
{ 16+15, 16+15, 16+14, 16+13, 16+12}, /* IdSel 7 slot 0 */
{ 16+11, 16+11, 16+10, 16+ 9, 16+ 8}, /* IdSel 8 slot 1 */
{ 16+ 7, 16+ 7, 16+ 6, 16+ 5, 16+ 4}, /* IdSel 9 slot 2 */
{ 16+ 3, 16+ 3, 16+ 2, 16+ 1, 16+ 0} /* IdSel 10 slot 3 */
};
const long min_idsel = 5, max_idsel = 10, irqs_per_slot = 5;
struct pci_controller *hose = dev->sysdata;
int irq = COMMON_TABLE_LOOKUP;
if (irq > 0)
irq += 16 * hose->index;
return isa_irq_fixup(dev, irq);
}
static int __init
monet_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
{
static char irq_tab[13][5] __initdata = {
/*INT INTA INTB INTC INTD */
{ 45, 45, 45, 45, 45}, /* IdSel 3 21143 PCI1 */
{ -1, -1, -1, -1, -1}, /* IdSel 4 unused */
{ -1, -1, -1, -1, -1}, /* IdSel 5 unused */
{ 47, 47, 47, 47, 47}, /* IdSel 6 SCSI PCI1 */
{ -1, -1, -1, -1, -1}, /* IdSel 7 ISA Bridge */
{ -1, -1, -1, -1, -1}, /* IdSel 8 P2P PCI1 */
#if 1
{ 28, 28, 29, 30, 31}, /* IdSel 14 slot 4 PCI2*/
{ 24, 24, 25, 26, 27}, /* IdSel 15 slot 5 PCI2*/
#else
{ -1, -1, -1, -1, -1}, /* IdSel 9 unused */
{ -1, -1, -1, -1, -1}, /* IdSel 10 unused */
#endif
{ 40, 40, 41, 42, 43}, /* IdSel 11 slot 1 PCI0*/
{ 36, 36, 37, 38, 39}, /* IdSel 12 slot 2 PCI0*/
{ 32, 32, 33, 34, 35}, /* IdSel 13 slot 3 PCI0*/
{ 28, 28, 29, 30, 31}, /* IdSel 14 slot 4 PCI2*/
{ 24, 24, 25, 26, 27} /* IdSel 15 slot 5 PCI2*/
};
const long min_idsel = 3, max_idsel = 15, irqs_per_slot = 5;
return isa_irq_fixup(dev, COMMON_TABLE_LOOKUP);
}
static u8 __init
monet_swizzle(struct pci_dev *dev, u8 *pinp)
{
struct pci_controller *hose = dev->sysdata;
int slot, pin = *pinp;
if (!dev->bus->parent) {
slot = PCI_SLOT(dev->devfn);
}
/* Check for the built-in bridge on hose 1. */
else if (hose->index == 1 && PCI_SLOT(dev->bus->self->devfn) == 8) {
slot = PCI_SLOT(dev->devfn);
} else {
/* Must be a card-based bridge. */
do {
/* Check for built-in bridge on hose 1. */
if (hose->index == 1 &&
PCI_SLOT(dev->bus->self->devfn) == 8) {
slot = PCI_SLOT(dev->devfn);
break;
}
pin = bridge_swizzle(pin, PCI_SLOT(dev->devfn)) ;
/* Move up the chain of bridges. */
dev = dev->bus->self;
/* Slot of the next bridge. */
slot = PCI_SLOT(dev->devfn);
} while (dev->bus->self);
}
*pinp = pin;
return slot;
}
static int __init
webbrick_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
{
static char irq_tab[13][5] __initdata = {
/*INT INTA INTB INTC INTD */
{ -1, -1, -1, -1, -1}, /* IdSel 7 ISA Bridge */
{ -1, -1, -1, -1, -1}, /* IdSel 8 unused */
{ 29, 29, 29, 29, 29}, /* IdSel 9 21143 #1 */
{ -1, -1, -1, -1, -1}, /* IdSel 10 unused */
{ 30, 30, 30, 30, 30}, /* IdSel 11 21143 #2 */
{ -1, -1, -1, -1, -1}, /* IdSel 12 unused */
{ -1, -1, -1, -1, -1}, /* IdSel 13 unused */
{ 35, 35, 34, 33, 32}, /* IdSel 14 slot 0 */
{ 39, 39, 38, 37, 36}, /* IdSel 15 slot 1 */
{ 43, 43, 42, 41, 40}, /* IdSel 16 slot 2 */
{ 47, 47, 46, 45, 44}, /* IdSel 17 slot 3 */
};
const long min_idsel = 7, max_idsel = 17, irqs_per_slot = 5;
return isa_irq_fixup(dev, COMMON_TABLE_LOOKUP);
}
static int __init
clipper_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
{
static char irq_tab[7][5] __initdata = {
/*INT INTA INTB INTC INTD */
{ 16+ 8, 16+ 8, 16+ 9, 16+10, 16+11}, /* IdSel 1 slot 1 */
{ 16+12, 16+12, 16+13, 16+14, 16+15}, /* IdSel 2 slot 2 */
{ 16+16, 16+16, 16+17, 16+18, 16+19}, /* IdSel 3 slot 3 */
{ 16+20, 16+20, 16+21, 16+22, 16+23}, /* IdSel 4 slot 4 */
{ 16+24, 16+24, 16+25, 16+26, 16+27}, /* IdSel 5 slot 5 */
{ 16+28, 16+28, 16+29, 16+30, 16+31}, /* IdSel 6 slot 6 */
{ -1, -1, -1, -1, -1} /* IdSel 7 ISA Bridge */
};
const long min_idsel = 1, max_idsel = 7, irqs_per_slot = 5;
struct pci_controller *hose = dev->sysdata;
int irq = COMMON_TABLE_LOOKUP;
if (irq > 0)
irq += 16 * hose->index;
return isa_irq_fixup(dev, irq);
}
static void __init
dp264_init_pci(void)
{
common_init_pci();
SMC669_Init(0);
}
static void __init
monet_init_pci(void)
{
common_init_pci();
SMC669_Init(1);
es1888_init();
}
static void __init
webbrick_init_arch(void)
{
tsunami_init_arch();
/* Tsunami caches 4 PTEs at a time; DS10 has only 1 hose. */
hose_head->sg_isa->align_entry = 4;
hose_head->sg_pci->align_entry = 4;
}
/*
* The System Vectors
*/
struct alpha_machine_vector dp264_mv __initmv = {
.vector_name = "DP264",
DO_EV6_MMU,
DO_DEFAULT_RTC,
DO_TSUNAMI_IO,
.machine_check = tsunami_machine_check,
.max_isa_dma_address = ALPHA_MAX_ISA_DMA_ADDRESS,
.min_io_address = DEFAULT_IO_BASE,
.min_mem_address = DEFAULT_MEM_BASE,
.pci_dac_offset = TSUNAMI_DAC_OFFSET,
.nr_irqs = 64,
.device_interrupt = dp264_device_interrupt,
.init_arch = tsunami_init_arch,
.init_irq = dp264_init_irq,
.init_rtc = common_init_rtc,
.init_pci = dp264_init_pci,
.kill_arch = tsunami_kill_arch,
.pci_map_irq = dp264_map_irq,
.pci_swizzle = common_swizzle,
};
ALIAS_MV(dp264)
struct alpha_machine_vector monet_mv __initmv = {
.vector_name = "Monet",
DO_EV6_MMU,
DO_DEFAULT_RTC,
DO_TSUNAMI_IO,
.machine_check = tsunami_machine_check,
.max_isa_dma_address = ALPHA_MAX_ISA_DMA_ADDRESS,
.min_io_address = DEFAULT_IO_BASE,
.min_mem_address = DEFAULT_MEM_BASE,
.pci_dac_offset = TSUNAMI_DAC_OFFSET,
.nr_irqs = 64,
.device_interrupt = dp264_device_interrupt,
.init_arch = tsunami_init_arch,
.init_irq = dp264_init_irq,
.init_rtc = common_init_rtc,
.init_pci = monet_init_pci,
.kill_arch = tsunami_kill_arch,
.pci_map_irq = monet_map_irq,
.pci_swizzle = monet_swizzle,
};
struct alpha_machine_vector webbrick_mv __initmv = {
.vector_name = "Webbrick",
DO_EV6_MMU,
DO_DEFAULT_RTC,
DO_TSUNAMI_IO,
.machine_check = tsunami_machine_check,
.max_isa_dma_address = ALPHA_MAX_ISA_DMA_ADDRESS,
.min_io_address = DEFAULT_IO_BASE,
.min_mem_address = DEFAULT_MEM_BASE,
.pci_dac_offset = TSUNAMI_DAC_OFFSET,
.nr_irqs = 64,
.device_interrupt = dp264_device_interrupt,
.init_arch = webbrick_init_arch,
.init_irq = dp264_init_irq,
.init_rtc = common_init_rtc,
.init_pci = common_init_pci,
.kill_arch = tsunami_kill_arch,
.pci_map_irq = webbrick_map_irq,
.pci_swizzle = common_swizzle,
};
struct alpha_machine_vector clipper_mv __initmv = {
.vector_name = "Clipper",
DO_EV6_MMU,
DO_DEFAULT_RTC,
DO_TSUNAMI_IO,
.machine_check = tsunami_machine_check,
.max_isa_dma_address = ALPHA_MAX_ISA_DMA_ADDRESS,
.min_io_address = DEFAULT_IO_BASE,
.min_mem_address = DEFAULT_MEM_BASE,
.pci_dac_offset = TSUNAMI_DAC_OFFSET,
.nr_irqs = 64,
.device_interrupt = dp264_device_interrupt,
.init_arch = tsunami_init_arch,
.init_irq = clipper_init_irq,
.init_rtc = common_init_rtc,
.init_pci = common_init_pci,
.kill_arch = tsunami_kill_arch,
.pci_map_irq = clipper_map_irq,
.pci_swizzle = common_swizzle,
};
/* Sharks strongly resemble Clipper, at least as far
* as interrupt routing, etc, so we're using the
* same functions as Clipper does
*/
struct alpha_machine_vector shark_mv __initmv = {
.vector_name = "Shark",
DO_EV6_MMU,
DO_DEFAULT_RTC,
DO_TSUNAMI_IO,
.machine_check = tsunami_machine_check,
.max_isa_dma_address = ALPHA_MAX_ISA_DMA_ADDRESS,
.min_io_address = DEFAULT_IO_BASE,
.min_mem_address = DEFAULT_MEM_BASE,
.pci_dac_offset = TSUNAMI_DAC_OFFSET,
.nr_irqs = 64,
.device_interrupt = dp264_device_interrupt,
.init_arch = tsunami_init_arch,
.init_irq = clipper_init_irq,
.init_rtc = common_init_rtc,
.init_pci = common_init_pci,
.kill_arch = tsunami_kill_arch,
.pci_map_irq = clipper_map_irq,
.pci_swizzle = common_swizzle,
};
/* No alpha_mv alias for webbrick/monet/clipper, since we compile them
in unconditionally with DP264; setup_arch knows how to cope. */
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