248 lines
5.9 KiB
C
248 lines
5.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* linux/arch/alpha/kernel/sys_mikasa.c
|
|
*
|
|
* Copyright (C) 1995 David A Rusling
|
|
* Copyright (C) 1996 Jay A Estabrook
|
|
* Copyright (C) 1998, 1999 Richard Henderson
|
|
*
|
|
* Code supporting the MIKASA (AlphaServer 1000).
|
|
*/
|
|
|
|
#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/mce.h>
|
|
#include <asm/dma.h>
|
|
#include <asm/irq.h>
|
|
#include <asm/mmu_context.h>
|
|
#include <asm/io.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
|
|
mikasa_update_irq_hw(int mask)
|
|
{
|
|
outw(mask, 0x536);
|
|
}
|
|
|
|
static inline void
|
|
mikasa_enable_irq(struct irq_data *d)
|
|
{
|
|
mikasa_update_irq_hw(cached_irq_mask |= 1 << (d->irq - 16));
|
|
}
|
|
|
|
static void
|
|
mikasa_disable_irq(struct irq_data *d)
|
|
{
|
|
mikasa_update_irq_hw(cached_irq_mask &= ~(1 << (d->irq - 16)));
|
|
}
|
|
|
|
static struct irq_chip mikasa_irq_type = {
|
|
.name = "MIKASA",
|
|
.irq_unmask = mikasa_enable_irq,
|
|
.irq_mask = mikasa_disable_irq,
|
|
.irq_mask_ack = mikasa_disable_irq,
|
|
};
|
|
|
|
static void
|
|
mikasa_device_interrupt(unsigned long vector)
|
|
{
|
|
unsigned long pld;
|
|
unsigned int i;
|
|
|
|
/* Read the interrupt summary registers */
|
|
pld = (((~inw(0x534) & 0x0000ffffUL) << 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);
|
|
} else {
|
|
handle_irq(i);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void __init
|
|
mikasa_init_irq(void)
|
|
{
|
|
long i;
|
|
|
|
if (alpha_using_srm)
|
|
alpha_mv.device_interrupt = srm_device_interrupt;
|
|
|
|
mikasa_update_irq_hw(0);
|
|
|
|
for (i = 16; i < 32; ++i) {
|
|
irq_set_chip_and_handler(i, &mikasa_irq_type,
|
|
handle_level_irq);
|
|
irq_set_status_flags(i, IRQ_LEVEL);
|
|
}
|
|
|
|
init_i8259a_irqs();
|
|
common_init_isa_dma();
|
|
}
|
|
|
|
|
|
/*
|
|
* PCI Fixup configuration.
|
|
*
|
|
* Summary @ 0x536:
|
|
* Bit Meaning
|
|
* 0 Interrupt Line A from slot 0
|
|
* 1 Interrupt Line B from slot 0
|
|
* 2 Interrupt Line C from slot 0
|
|
* 3 Interrupt Line D from slot 0
|
|
* 4 Interrupt Line A from slot 1
|
|
* 5 Interrupt line B from slot 1
|
|
* 6 Interrupt Line C from slot 1
|
|
* 7 Interrupt Line D from slot 1
|
|
* 8 Interrupt Line A from slot 2
|
|
* 9 Interrupt Line B from slot 2
|
|
*10 Interrupt Line C from slot 2
|
|
*11 Interrupt Line D from slot 2
|
|
*12 NCR 810 SCSI
|
|
*13 Power Supply Fail
|
|
*14 Temperature Warn
|
|
*15 Reserved
|
|
*
|
|
* The device to slot mapping looks like:
|
|
*
|
|
* Slot Device
|
|
* 6 NCR SCSI controller
|
|
* 7 Intel PCI-EISA 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
|
|
mikasa_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
|
|
{
|
|
static char irq_tab[8][5] = {
|
|
/*INT INTA INTB INTC INTD */
|
|
{16+12, 16+12, 16+12, 16+12, 16+12}, /* IdSel 17, SCSI */
|
|
{ -1, -1, -1, -1, -1}, /* IdSel 18, PCEB */
|
|
{ -1, -1, -1, -1, -1}, /* IdSel 19, ???? */
|
|
{ -1, -1, -1, -1, -1}, /* IdSel 20, ???? */
|
|
{ -1, -1, -1, -1, -1}, /* IdSel 21, ???? */
|
|
{ 16+0, 16+0, 16+1, 16+2, 16+3}, /* IdSel 22, slot 0 */
|
|
{ 16+4, 16+4, 16+5, 16+6, 16+7}, /* IdSel 23, slot 1 */
|
|
{ 16+8, 16+8, 16+9, 16+10, 16+11}, /* IdSel 24, slot 2 */
|
|
};
|
|
const long min_idsel = 6, max_idsel = 13, irqs_per_slot = 5;
|
|
return COMMON_TABLE_LOOKUP;
|
|
}
|
|
|
|
|
|
#if defined(CONFIG_ALPHA_GENERIC) || !defined(CONFIG_ALPHA_PRIMO)
|
|
static void
|
|
mikasa_apecs_machine_check(unsigned long vector, unsigned long la_ptr)
|
|
{
|
|
#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, "MIKASA APECS",
|
|
(mcheck_expected(0)
|
|
&& (code == MCHK_NO_DEVSEL
|
|
|| code == MCHK_NO_TABT)));
|
|
}
|
|
#endif
|
|
|
|
|
|
/*
|
|
* The System Vector
|
|
*/
|
|
|
|
#if defined(CONFIG_ALPHA_GENERIC) || !defined(CONFIG_ALPHA_PRIMO)
|
|
struct alpha_machine_vector mikasa_mv __initmv = {
|
|
.vector_name = "Mikasa",
|
|
DO_EV4_MMU,
|
|
DO_DEFAULT_RTC,
|
|
DO_APECS_IO,
|
|
.machine_check = mikasa_apecs_machine_check,
|
|
.max_isa_dma_address = ALPHA_MAX_ISA_DMA_ADDRESS,
|
|
.min_io_address = DEFAULT_IO_BASE,
|
|
.min_mem_address = APECS_AND_LCA_DEFAULT_MEM_BASE,
|
|
|
|
.nr_irqs = 32,
|
|
.device_interrupt = mikasa_device_interrupt,
|
|
|
|
.init_arch = apecs_init_arch,
|
|
.init_irq = mikasa_init_irq,
|
|
.init_rtc = common_init_rtc,
|
|
.init_pci = common_init_pci,
|
|
.pci_map_irq = mikasa_map_irq,
|
|
.pci_swizzle = common_swizzle,
|
|
};
|
|
ALIAS_MV(mikasa)
|
|
#endif
|
|
|
|
#if defined(CONFIG_ALPHA_GENERIC) || defined(CONFIG_ALPHA_PRIMO)
|
|
struct alpha_machine_vector mikasa_primo_mv __initmv = {
|
|
.vector_name = "Mikasa-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 = DEFAULT_IO_BASE,
|
|
.min_mem_address = CIA_DEFAULT_MEM_BASE,
|
|
|
|
.nr_irqs = 32,
|
|
.device_interrupt = mikasa_device_interrupt,
|
|
|
|
.init_arch = cia_init_arch,
|
|
.init_irq = mikasa_init_irq,
|
|
.init_rtc = common_init_rtc,
|
|
.init_pci = cia_init_pci,
|
|
.kill_arch = cia_kill_arch,
|
|
.pci_map_irq = mikasa_map_irq,
|
|
.pci_swizzle = common_swizzle,
|
|
};
|
|
ALIAS_MV(mikasa_primo)
|
|
#endif
|