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linux_dsm_epyc7002/arch/alpha/kernel/sys_dp264.c
Thomas Gleixner 44377f622e alpha: remove obsolete hw_interrupt_type 
The defines and typedefs (hw_interrupt_type, no_irq_type, irq_desc_t) have
been kept around for migration reasons.  After more than two years it's
time to remove them finally.

This patch cleans up one of the remaining users.  When all such patches
hit mainline we can remove the defines and typedefs finally.

Impact: cleanup

Convert the last remaining users to struct irq_chip and remove the
define.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Richard Henderson <rth@twiddle.net>

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-16 19:47:46 -07:00

707 lines
18 KiB
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Raw Blame History

/*
* 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/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 int
dp264_set_affinity(unsigned int irq, const struct cpumask *affinity)
{
spin_lock(&dp264_irq_lock);
cpu_set_irq_affinity(irq, *affinity);
tsunami_update_irq_hw(cached_irq_mask);
spin_unlock(&dp264_irq_lock);
return 0;
}
static int
clipper_set_affinity(unsigned int irq, const struct cpumask *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);
return 0;
}
static struct irq_chip 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 irq_chip 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)
{
#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);
else
handle_irq(16 + i);
#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)
{
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);
}
static void
clipper_srm_device_interrupt(unsigned long vector)
{
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);
}
static void __init
init_tsunami_irqs(struct irq_chip * ops, int imin, int imax)
{
long i;
for (i = imin; i <= imax; ++i) {
irq_desc[i].status = IRQ_DISABLED | IRQ_LEVEL;
irq_desc[i].chip = 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 = pci_swizzle_interrupt_pin(dev, pin);
/* 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);
locate_and_init_vga(NULL);
}
static void __init
monet_init_pci(void)
{
common_init_pci();
SMC669_Init(1);
es1888_init();
locate_and_init_vga(NULL);
}
static void __init
clipper_init_pci(void)
{
common_init_pci();
locate_and_init_vga(NULL);
}
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 = clipper_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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