348 lines
9.3 KiB
C
348 lines
9.3 KiB
C
|
/*
|
||
|
|
* linux/arch/alpha/kernel/sys_noritake.c
|
||
|
|
*
|
||
|
|
* Copyright (C) 1995 David A Rusling
|
||
|
|
* Copyright (C) 1996 Jay A Estabrook
|
||
|
|
* Copyright (C) 1998, 1999 Richard Henderson
|
||
|
|
*
|
||
|
|
* Code supporting the NORITAKE (AlphaServer 1000A),
|
||
|
|
* CORELLE (AlphaServer 800), and ALCOR Primo (AlphaStation 600A).
|
||
|
|
*/
|
||
|
|
|
||
|
|
#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_apecs.h>
|
||
|
|
#include <asm/core_cia.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 int cached_irq_mask;
|
||
|
|
|
||
|
|
static inline void
|
||
|
|
noritake_update_irq_hw(int irq, int mask)
|
||
|
|
{
|
||
|
|
int port = 0x54a;
|
||
|
|
if (irq >= 32) {
|
||
|
|
mask >>= 16;
|
||
|
|
port = 0x54c;
|
||
|
|
}
|
||
|
|
outw(mask, port);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
noritake_enable_irq(unsigned int irq)
|
||
|
|
{
|
||
|
|
noritake_update_irq_hw(irq, cached_irq_mask |= 1 << (irq - 16));
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
noritake_disable_irq(unsigned int irq)
|
||
|
|
{
|
||
|
|
noritake_update_irq_hw(irq, cached_irq_mask &= ~(1 << (irq - 16)));
|
||
|
|
}
|
||
|
|
|
||
|
|
static unsigned int
|
||
|
|
noritake_startup_irq(unsigned int irq)
|
||
|
|
{
|
||
|
|
noritake_enable_irq(irq);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct hw_interrupt_type noritake_irq_type = {
|
||
|
|
.typename = "NORITAKE",
|
||
|
|
.startup = noritake_startup_irq,
|
||
|
|
.shutdown = noritake_disable_irq,
|
||
|
|
.enable = noritake_enable_irq,
|
||
|
|
.disable = noritake_disable_irq,
|
||
|
|
.ack = noritake_disable_irq,
|
||
|
|
.end = noritake_enable_irq,
|
||
|
|
};
|
||
|
|
|
||
|
|
static void
|
||
|
|
noritake_device_interrupt(unsigned long vector, struct pt_regs *regs)
|
||
|
|
{
|
||
|
|
unsigned long pld;
|
||
|
|
unsigned int i;
|
||
|
|
|
||
|
|
/* Read the interrupt summary registers of NORITAKE */
|
||
|
|
pld = (((unsigned long) inw(0x54c) << 32)
|
||
|
|
| ((unsigned long) inw(0x54a) << 16)
|
||
|
|
| ((unsigned long) inb(0xa0) << 8)
|
||
|
|
| inb(0x20));
|
||
|
|
|
||
|
|
/*
|
||
|
|
* 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 < 16) {
|
||
|
|
isa_device_interrupt(vector, regs);
|
||
|
|
} else {
|
||
|
|
handle_irq(i, regs);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
noritake_srm_device_interrupt(unsigned long vector, struct pt_regs * regs)
|
||
|
|
{
|
||
|
|
int irq;
|
||
|
|
|
||
|
|
irq = (vector - 0x800) >> 4;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* I really hate to do this, too, but the NORITAKE SRM console also
|
||
|
|
* reports PCI vectors *lower* than I expected from the bit numbers
|
||
|
|
* in the documentation.
|
||
|
|
* But I really don't want to change the fixup code for allocation
|
||
|
|
* of IRQs, nor the alpha_irq_mask maintenance stuff, both of which
|
||
|
|
* look nice and clean now.
|
||
|
|
* So, here's this additional grotty hack... :-(
|
||
|
|
*/
|
||
|
|
if (irq >= 16)
|
||
|
|
irq = irq + 1;
|
||
|
|
|
||
|
|
handle_irq(irq, regs);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void __init
|
||
|
|
noritake_init_irq(void)
|
||
|
|
{
|
||
|
|
long i;
|
||
|
|
|
||
|
|
if (alpha_using_srm)
|
||
|
|
alpha_mv.device_interrupt = noritake_srm_device_interrupt;
|
||
|
|
|
||
|
|
outw(0, 0x54a);
|
||
|
|
outw(0, 0x54c);
|
||
|
|
|
||
|
|
for (i = 16; i < 48; ++i) {
|
||
|
|
irq_desc[i].status = IRQ_DISABLED | IRQ_LEVEL;
|
||
|
|
irq_desc[i].handler = &noritake_irq_type;
|
||
|
|
}
|
||
|
|
|
||
|
|
init_i8259a_irqs();
|
||
|
|
common_init_isa_dma();
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* PCI Fixup configuration.
|
||
|
|
*
|
||
|
|
* Summary @ 0x542, summary register #1:
|
||
|
|
* Bit Meaning
|
||
|
|
* 0 All valid ints from summary regs 2 & 3
|
||
|
|
* 1 QLOGIC ISP1020A SCSI
|
||
|
|
* 2 Interrupt Line A from slot 0
|
||
|
|
* 3 Interrupt Line B from slot 0
|
||
|
|
* 4 Interrupt Line A from slot 1
|
||
|
|
* 5 Interrupt line B from slot 1
|
||
|
|
* 6 Interrupt Line A from slot 2
|
||
|
|
* 7 Interrupt Line B from slot 2
|
||
|
|
* 8 Interrupt Line A from slot 3
|
||
|
|
* 9 Interrupt Line B from slot 3
|
||
|
|
*10 Interrupt Line A from slot 4
|
||
|
|
*11 Interrupt Line B from slot 4
|
||
|
|
*12 Interrupt Line A from slot 5
|
||
|
|
*13 Interrupt Line B from slot 5
|
||
|
|
*14 Interrupt Line A from slot 6
|
||
|
|
*15 Interrupt Line B from slot 6
|
||
|
|
*
|
||
|
|
* Summary @ 0x544, summary register #2:
|
||
|
|
* Bit Meaning
|
||
|
|
* 0 OR of all unmasked ints in SR #2
|
||
|
|
* 1 OR of secondary bus ints
|
||
|
|
* 2 Interrupt Line C from slot 0
|
||
|
|
* 3 Interrupt Line D from slot 0
|
||
|
|
* 4 Interrupt Line C from slot 1
|
||
|
|
* 5 Interrupt line D from slot 1
|
||
|
|
* 6 Interrupt Line C from slot 2
|
||
|
|
* 7 Interrupt Line D from slot 2
|
||
|
|
* 8 Interrupt Line C from slot 3
|
||
|
|
* 9 Interrupt Line D from slot 3
|
||
|
|
*10 Interrupt Line C from slot 4
|
||
|
|
*11 Interrupt Line D from slot 4
|
||
|
|
*12 Interrupt Line C from slot 5
|
||
|
|
*13 Interrupt Line D from slot 5
|
||
|
|
*14 Interrupt Line C from slot 6
|
||
|
|
*15 Interrupt Line D from slot 6
|
||
|
|
*
|
||
|
|
* The device to slot mapping looks like:
|
||
|
|
*
|
||
|
|
* Slot Device
|
||
|
|
* 7 Intel PCI-EISA bridge chip
|
||
|
|
* 8 DEC PCI-PCI bridge chip
|
||
|
|
* 11 PCI on board slot 0
|
||
|
|
* 12 PCI on board slot 1
|
||
|
|
* 13 PCI on board slot 2
|
||
|
|
*
|
||
|
|
*
|
||
|
|
* This two layered interrupt approach means that we allocate IRQ 16 and
|
||
|
|
* above for PCI interrupts. The IRQ relates to which bit the interrupt
|
||
|
|
* comes in on. This makes interrupt processing much easier.
|
||
|
|
*/
|
||
|
|
|
||
|
|
static int __init
|
||
|
|
noritake_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
|
||
|
|
{
|
||
|
|
static char irq_tab[15][5] __initdata = {
|
||
|
|
/*INT INTA INTB INTC INTD */
|
||
|
|
/* note: IDSELs 16, 17, and 25 are CORELLE only */
|
||
|
|
{ 16+1, 16+1, 16+1, 16+1, 16+1}, /* IdSel 16, QLOGIC */
|
||
|
|
{ -1, -1, -1, -1, -1}, /* IdSel 17, S3 Trio64 */
|
||
|
|
{ -1, -1, -1, -1, -1}, /* IdSel 18, PCEB */
|
||
|
|
{ -1, -1, -1, -1, -1}, /* IdSel 19, PPB */
|
||
|
|
{ -1, -1, -1, -1, -1}, /* IdSel 20, ???? */
|
||
|
|
{ -1, -1, -1, -1, -1}, /* IdSel 21, ???? */
|
||
|
|
{ 16+2, 16+2, 16+3, 32+2, 32+3}, /* IdSel 22, slot 0 */
|
||
|
|
{ 16+4, 16+4, 16+5, 32+4, 32+5}, /* IdSel 23, slot 1 */
|
||
|
|
{ 16+6, 16+6, 16+7, 32+6, 32+7}, /* IdSel 24, slot 2 */
|
||
|
|
{ 16+8, 16+8, 16+9, 32+8, 32+9}, /* IdSel 25, slot 3 */
|
||
|
|
/* The following 5 are actually on PCI bus 1, which is
|
||
|
|
across the built-in bridge of the NORITAKE only. */
|
||
|
|
{ 16+1, 16+1, 16+1, 16+1, 16+1}, /* IdSel 16, QLOGIC */
|
||
|
|
{ 16+8, 16+8, 16+9, 32+8, 32+9}, /* IdSel 17, slot 3 */
|
||
|
|
{16+10, 16+10, 16+11, 32+10, 32+11}, /* IdSel 18, slot 4 */
|
||
|
|
{16+12, 16+12, 16+13, 32+12, 32+13}, /* IdSel 19, slot 5 */
|
||
|
|
{16+14, 16+14, 16+15, 32+14, 32+15}, /* IdSel 20, slot 6 */
|
||
|
|
};
|
||
|
|
const long min_idsel = 5, max_idsel = 19, irqs_per_slot = 5;
|
||
|
|
return COMMON_TABLE_LOOKUP;
|
||
|
|
}
|
||
|
|
|
||
|
|
static u8 __init
|
||
|
|
noritake_swizzle(struct pci_dev *dev, u8 *pinp)
|
||
|
|
{
|
||
|
|
int slot, pin = *pinp;
|
||
|
|
|
||
|
|
if (dev->bus->number == 0) {
|
||
|
|
slot = PCI_SLOT(dev->devfn);
|
||
|
|
}
|
||
|
|
/* Check for the built-in bridge */
|
||
|
|
else if (PCI_SLOT(dev->bus->self->devfn) == 8) {
|
||
|
|
slot = PCI_SLOT(dev->devfn) + 15; /* WAG! */
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
/* Must be a card-based bridge. */
|
||
|
|
do {
|
||
|
|
if (PCI_SLOT(dev->bus->self->devfn) == 8) {
|
||
|
|
slot = PCI_SLOT(dev->devfn) + 15;
|
||
|
|
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;
|
||
|
|
}
|
||
|
|
|
||
|
|
#if defined(CONFIG_ALPHA_GENERIC) || !defined(CONFIG_ALPHA_PRIMO)
|
||
|
|
static void
|
||
|
|
noritake_apecs_machine_check(unsigned long vector, unsigned long la_ptr,
|
||
|
|
struct pt_regs * regs)
|
||
|
|
{
|
||
|
|
#define MCHK_NO_DEVSEL 0x205U
|
||
|
|
#define MCHK_NO_TABT 0x204U
|
||
|
|
|
||
|
|
struct el_common *mchk_header;
|
||
|
|
unsigned int code;
|
||
|
|
|
||
|
|
mchk_header = (struct el_common *)la_ptr;
|
||
|
|
|
||
|
|
/* Clear the error before any reporting. */
|
||
|
|
mb();
|
||
|
|
mb(); /* magic */
|
||
|
|
draina();
|
||
|
|
apecs_pci_clr_err();
|
||
|
|
wrmces(0x7);
|
||
|
|
mb();
|
||
|
|
|
||
|
|
code = mchk_header->code;
|
||
|
|
process_mcheck_info(vector, la_ptr, regs, "NORITAKE APECS",
|
||
|
|
(mcheck_expected(0)
|
||
|
|
&& (code == MCHK_NO_DEVSEL
|
||
|
|
|| code == MCHK_NO_TABT)));
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* The System Vectors
|
||
|
|
*/
|
||
|
|
|
||
|
|
#if defined(CONFIG_ALPHA_GENERIC) || !defined(CONFIG_ALPHA_PRIMO)
|
||
|
|
struct alpha_machine_vector noritake_mv __initmv = {
|
||
|
|
.vector_name = "Noritake",
|
||
|
|
DO_EV4_MMU,
|
||
|
|
DO_DEFAULT_RTC,
|
||
|
|
DO_APECS_IO,
|
||
|
|
.machine_check = noritake_apecs_machine_check,
|
||
|
|
.max_isa_dma_address = ALPHA_MAX_ISA_DMA_ADDRESS,
|
||
|
|
.min_io_address = EISA_DEFAULT_IO_BASE,
|
||
|
|
.min_mem_address = APECS_AND_LCA_DEFAULT_MEM_BASE,
|
||
|
|
|
||
|
|
.nr_irqs = 48,
|
||
|
|
.device_interrupt = noritake_device_interrupt,
|
||
|
|
|
||
|
|
.init_arch = apecs_init_arch,
|
||
|
|
.init_irq = noritake_init_irq,
|
||
|
|
.init_rtc = common_init_rtc,
|
||
|
|
.init_pci = common_init_pci,
|
||
|
|
.pci_map_irq = noritake_map_irq,
|
||
|
|
.pci_swizzle = noritake_swizzle,
|
||
|
|
};
|
||
|
|
ALIAS_MV(noritake)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if defined(CONFIG_ALPHA_GENERIC) || defined(CONFIG_ALPHA_PRIMO)
|
||
|
|
struct alpha_machine_vector noritake_primo_mv __initmv = {
|
||
|
|
.vector_name = "Noritake-Primo",
|
||
|
|
DO_EV5_MMU,
|
||
|
|
DO_DEFAULT_RTC,
|
||
|
|
DO_CIA_IO,
|
||
|
|
.machine_check = cia_machine_check,
|
||
|
|
.max_isa_dma_address = ALPHA_MAX_ISA_DMA_ADDRESS,
|
||
|
|
.min_io_address = EISA_DEFAULT_IO_BASE,
|
||
|
|
.min_mem_address = CIA_DEFAULT_MEM_BASE,
|
||
|
|
|
||
|
|
.nr_irqs = 48,
|
||
|
|
.device_interrupt = noritake_device_interrupt,
|
||
|
|
|
||
|
|
.init_arch = cia_init_arch,
|
||
|
|
.init_irq = noritake_init_irq,
|
||
|
|
.init_rtc = common_init_rtc,
|
||
|
|
.init_pci = cia_init_pci,
|
||
|
|
.kill_arch = cia_kill_arch,
|
||
|
|
.pci_map_irq = noritake_map_irq,
|
||
|
|
.pci_swizzle = noritake_swizzle,
|
||
|
|
};
|
||
|
|
ALIAS_MV(noritake_primo)
|
||
|
|
#endif
|