// SPDX-License-Identifier: GPL-2.0
/*
* 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 /dma.h>
#include <asm /irq.h>
#include <asm /mmu_context.h>
#include <asm /io.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 ] = { 0 UL, 0 UL, 0 UL, 0 UL };
DEFINE_SPINLOCK(dp264_irq_lock);
static void
tsunami_update_irq_hw(unsigned long mask)
{
register tsunami_cchip *cchip = TSUNAMI_cchip;
unsigned long isa_enable = 1 UL << 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(struct irq_data *d)
{
spin_lock(&dp264_irq_lock);
cached_irq_mask |= 1 UL << d->irq;
tsunami_update_irq_hw(cached_irq_mask);
spin_unlock(&dp264_irq_lock);
}
static void
dp264_disable_irq(struct irq_data *d)
{
spin_lock(&dp264_irq_lock);
cached_irq_mask &= ~(1 UL << d->irq);
tsunami_update_irq_hw(cached_irq_mask);
spin_unlock(&dp264_irq_lock);
}
static void
clipper_enable_irq(struct irq_data *d)
{
spin_lock(&dp264_irq_lock);
cached_irq_mask |= 1 UL << (d->irq - 16 );
tsunami_update_irq_hw(cached_irq_mask);
spin_unlock(&dp264_irq_lock);
}
static void
clipper_disable_irq(struct irq_data *d)
{
spin_lock(&dp264_irq_lock);
cached_irq_mask &= ~(1 UL << (d->irq - 16 ));
tsunami_update_irq_hw(cached_irq_mask);
spin_unlock(&dp264_irq_lock);
}
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 (cpumask_test_cpu(cpu, &affinity))
aff |= 1 UL << irq;
else
aff &= ~(1 UL << irq);
cpu_irq_affinity[cpu] = aff;
}
}
static int
dp264_set_affinity(struct irq_data *d, const struct cpumask *affinity,
bool force)
{
spin_lock(&dp264_irq_lock);
cpu_set_irq_affinity(d->irq, *affinity);
tsunami_update_irq_hw(cached_irq_mask);
spin_unlock(&dp264_irq_lock);
return 0 ;
}
static int
clipper_set_affinity(struct irq_data *d, const struct cpumask *affinity,
bool force)
{
spin_lock(&dp264_irq_lock);
cpu_set_irq_affinity(d->irq - 16 , *affinity);
tsunami_update_irq_hw(cached_irq_mask);
spin_unlock(&dp264_irq_lock);
return 0 ;
}
static struct irq_chip dp264_irq_type = {
.name = "DP264" ,
.irq_unmask = dp264_enable_irq,
.irq_mask = dp264_disable_irq,
.irq_mask_ack = dp264_disable_irq,
.irq_set_affinity = dp264_set_affinity,
};
static struct irq_chip clipper_irq_type = {
.name = "CLIPPER" ,
.irq_unmask = clipper_enable_irq,
.irq_mask = clipper_disable_irq,
.irq_mask_ack = clipper_disable_irq,
.irq_set_affinity = clipper_set_affinity,
};
static void
dp264_device_interrupt(unsigned long vector)
{
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);
}
}
static void
dp264_srm_device_interrupt(unsigned long vector)
{
int irq;
irq = (vector - 0 x800) >> 4 ;
/*
* The SRM console reports PCI interrupts with a vector calculated by :
*
* 0 x900 + ( 0 x10 * 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 - 0 x800) >> 4 ;
/*
* The SRM console reports PCI interrupts with a vector calculated by :
*
* 0 x900 + ( 0 x10 * 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_set_chip_and_handler(i, ops, handle_level_irq);
irq_set_status_flags(i, IRQ_LEVEL);
}
}
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
isa_irq_fixup(const 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 & 0 xf;
}
static int
dp264_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
static char irq_tab[6 ][5 ] = {
/*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
monet_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
static char irq_tab[13 ][5 ] = {
/*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
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
webbrick_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
static char irq_tab[13 ][5 ] = {
/*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
clipper_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
static char irq_tab[7 ][5 ] = {
/*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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