1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
362 lines
8.9 KiB
C
362 lines
8.9 KiB
C
/*
|
|
* linux/arch/alpha/kernel/sys_wildfire.c
|
|
*
|
|
* Wildfire support.
|
|
*
|
|
* Copyright (C) 2000 Andrea Arcangeli <andrea@suse.de> SuSE
|
|
*/
|
|
|
|
#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_wildfire.h>
|
|
#include <asm/hwrpb.h>
|
|
#include <asm/tlbflush.h>
|
|
|
|
#include "proto.h"
|
|
#include "irq_impl.h"
|
|
#include "pci_impl.h"
|
|
#include "machvec_impl.h"
|
|
|
|
static unsigned long cached_irq_mask[WILDFIRE_NR_IRQS/(sizeof(long)*8)];
|
|
|
|
DEFINE_SPINLOCK(wildfire_irq_lock);
|
|
|
|
static int doing_init_irq_hw = 0;
|
|
|
|
static void
|
|
wildfire_update_irq_hw(unsigned int irq)
|
|
{
|
|
int qbbno = (irq >> 8) & (WILDFIRE_MAX_QBB - 1);
|
|
int pcano = (irq >> 6) & (WILDFIRE_PCA_PER_QBB - 1);
|
|
wildfire_pca *pca;
|
|
volatile unsigned long * enable0;
|
|
|
|
if (!WILDFIRE_PCA_EXISTS(qbbno, pcano)) {
|
|
if (!doing_init_irq_hw) {
|
|
printk(KERN_ERR "wildfire_update_irq_hw:"
|
|
" got irq %d for non-existent PCA %d"
|
|
" on QBB %d.\n",
|
|
irq, pcano, qbbno);
|
|
}
|
|
return;
|
|
}
|
|
|
|
pca = WILDFIRE_pca(qbbno, pcano);
|
|
enable0 = (unsigned long *) &pca->pca_int[0].enable; /* ??? */
|
|
|
|
*enable0 = cached_irq_mask[qbbno * WILDFIRE_PCA_PER_QBB + pcano];
|
|
mb();
|
|
*enable0;
|
|
}
|
|
|
|
static void __init
|
|
wildfire_init_irq_hw(void)
|
|
{
|
|
#if 0
|
|
register wildfire_pca * pca = WILDFIRE_pca(0, 0);
|
|
volatile unsigned long * enable0, * enable1, * enable2, *enable3;
|
|
volatile unsigned long * target0, * target1, * target2, *target3;
|
|
|
|
enable0 = (unsigned long *) &pca->pca_int[0].enable;
|
|
enable1 = (unsigned long *) &pca->pca_int[1].enable;
|
|
enable2 = (unsigned long *) &pca->pca_int[2].enable;
|
|
enable3 = (unsigned long *) &pca->pca_int[3].enable;
|
|
|
|
target0 = (unsigned long *) &pca->pca_int[0].target;
|
|
target1 = (unsigned long *) &pca->pca_int[1].target;
|
|
target2 = (unsigned long *) &pca->pca_int[2].target;
|
|
target3 = (unsigned long *) &pca->pca_int[3].target;
|
|
|
|
*enable0 = *enable1 = *enable2 = *enable3 = 0;
|
|
|
|
*target0 = (1UL<<8) | WILDFIRE_QBB(0);
|
|
*target1 = *target2 = *target3 = 0;
|
|
|
|
mb();
|
|
|
|
*enable0; *enable1; *enable2; *enable3;
|
|
*target0; *target1; *target2; *target3;
|
|
|
|
#else
|
|
int i;
|
|
|
|
doing_init_irq_hw = 1;
|
|
|
|
/* Need to update only once for every possible PCA. */
|
|
for (i = 0; i < WILDFIRE_NR_IRQS; i+=WILDFIRE_IRQ_PER_PCA)
|
|
wildfire_update_irq_hw(i);
|
|
|
|
doing_init_irq_hw = 0;
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
wildfire_enable_irq(unsigned int irq)
|
|
{
|
|
if (irq < 16)
|
|
i8259a_enable_irq(irq);
|
|
|
|
spin_lock(&wildfire_irq_lock);
|
|
set_bit(irq, &cached_irq_mask);
|
|
wildfire_update_irq_hw(irq);
|
|
spin_unlock(&wildfire_irq_lock);
|
|
}
|
|
|
|
static void
|
|
wildfire_disable_irq(unsigned int irq)
|
|
{
|
|
if (irq < 16)
|
|
i8259a_disable_irq(irq);
|
|
|
|
spin_lock(&wildfire_irq_lock);
|
|
clear_bit(irq, &cached_irq_mask);
|
|
wildfire_update_irq_hw(irq);
|
|
spin_unlock(&wildfire_irq_lock);
|
|
}
|
|
|
|
static void
|
|
wildfire_mask_and_ack_irq(unsigned int irq)
|
|
{
|
|
if (irq < 16)
|
|
i8259a_mask_and_ack_irq(irq);
|
|
|
|
spin_lock(&wildfire_irq_lock);
|
|
clear_bit(irq, &cached_irq_mask);
|
|
wildfire_update_irq_hw(irq);
|
|
spin_unlock(&wildfire_irq_lock);
|
|
}
|
|
|
|
static unsigned int
|
|
wildfire_startup_irq(unsigned int irq)
|
|
{
|
|
wildfire_enable_irq(irq);
|
|
return 0; /* never anything pending */
|
|
}
|
|
|
|
static void
|
|
wildfire_end_irq(unsigned int irq)
|
|
{
|
|
#if 0
|
|
if (!irq_desc[irq].action)
|
|
printk("got irq %d\n", irq);
|
|
#endif
|
|
if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
|
|
wildfire_enable_irq(irq);
|
|
}
|
|
|
|
static struct hw_interrupt_type wildfire_irq_type = {
|
|
.typename = "WILDFIRE",
|
|
.startup = wildfire_startup_irq,
|
|
.shutdown = wildfire_disable_irq,
|
|
.enable = wildfire_enable_irq,
|
|
.disable = wildfire_disable_irq,
|
|
.ack = wildfire_mask_and_ack_irq,
|
|
.end = wildfire_end_irq,
|
|
};
|
|
|
|
static void __init
|
|
wildfire_init_irq_per_pca(int qbbno, int pcano)
|
|
{
|
|
int i, irq_bias;
|
|
unsigned long io_bias;
|
|
static struct irqaction isa_enable = {
|
|
.handler = no_action,
|
|
.name = "isa_enable",
|
|
};
|
|
|
|
irq_bias = qbbno * (WILDFIRE_PCA_PER_QBB * WILDFIRE_IRQ_PER_PCA)
|
|
+ pcano * WILDFIRE_IRQ_PER_PCA;
|
|
|
|
/* Only need the following for first PCI bus per PCA. */
|
|
io_bias = WILDFIRE_IO(qbbno, pcano<<1) - WILDFIRE_IO_BIAS;
|
|
|
|
#if 0
|
|
outb(0, DMA1_RESET_REG + io_bias);
|
|
outb(0, DMA2_RESET_REG + io_bias);
|
|
outb(DMA_MODE_CASCADE, DMA2_MODE_REG + io_bias);
|
|
outb(0, DMA2_MASK_REG + io_bias);
|
|
#endif
|
|
|
|
#if 0
|
|
/* ??? Not sure how to do this, yet... */
|
|
init_i8259a_irqs(); /* ??? */
|
|
#endif
|
|
|
|
for (i = 0; i < 16; ++i) {
|
|
if (i == 2)
|
|
continue;
|
|
irq_desc[i+irq_bias].status = IRQ_DISABLED | IRQ_LEVEL;
|
|
irq_desc[i+irq_bias].handler = &wildfire_irq_type;
|
|
}
|
|
|
|
irq_desc[36+irq_bias].status = IRQ_DISABLED | IRQ_LEVEL;
|
|
irq_desc[36+irq_bias].handler = &wildfire_irq_type;
|
|
for (i = 40; i < 64; ++i) {
|
|
irq_desc[i+irq_bias].status = IRQ_DISABLED | IRQ_LEVEL;
|
|
irq_desc[i+irq_bias].handler = &wildfire_irq_type;
|
|
}
|
|
|
|
setup_irq(32+irq_bias, &isa_enable);
|
|
}
|
|
|
|
static void __init
|
|
wildfire_init_irq(void)
|
|
{
|
|
int qbbno, pcano;
|
|
|
|
#if 1
|
|
wildfire_init_irq_hw();
|
|
init_i8259a_irqs();
|
|
#endif
|
|
|
|
for (qbbno = 0; qbbno < WILDFIRE_MAX_QBB; qbbno++) {
|
|
if (WILDFIRE_QBB_EXISTS(qbbno)) {
|
|
for (pcano = 0; pcano < WILDFIRE_PCA_PER_QBB; pcano++) {
|
|
if (WILDFIRE_PCA_EXISTS(qbbno, pcano)) {
|
|
wildfire_init_irq_per_pca(qbbno, pcano);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
wildfire_device_interrupt(unsigned long vector, struct pt_regs * regs)
|
|
{
|
|
int irq;
|
|
|
|
irq = (vector - 0x800) >> 4;
|
|
|
|
/*
|
|
* bits 10-8: source QBB ID
|
|
* bits 7-6: PCA
|
|
* bits 5-0: irq in PCA
|
|
*/
|
|
|
|
handle_irq(irq, regs);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* PCI Fixup configuration.
|
|
*
|
|
* Summary per PCA (2 PCI or HIPPI buses):
|
|
*
|
|
* Bit Meaning
|
|
* 0-15 ISA
|
|
*
|
|
*32 ISA summary
|
|
*33 SMI
|
|
*34 NMI
|
|
*36 builtin QLogic SCSI (or slot 0 if no IO module)
|
|
*40 Interrupt Line A from slot 2 PCI0
|
|
*41 Interrupt Line B from slot 2 PCI0
|
|
*42 Interrupt Line C from slot 2 PCI0
|
|
*43 Interrupt Line D from slot 2 PCI0
|
|
*44 Interrupt Line A from slot 3 PCI0
|
|
*45 Interrupt Line B from slot 3 PCI0
|
|
*46 Interrupt Line C from slot 3 PCI0
|
|
*47 Interrupt Line D from slot 3 PCI0
|
|
*
|
|
*48 Interrupt Line A from slot 4 PCI1
|
|
*49 Interrupt Line B from slot 4 PCI1
|
|
*50 Interrupt Line C from slot 4 PCI1
|
|
*51 Interrupt Line D from slot 4 PCI1
|
|
*52 Interrupt Line A from slot 5 PCI1
|
|
*53 Interrupt Line B from slot 5 PCI1
|
|
*54 Interrupt Line C from slot 5 PCI1
|
|
*55 Interrupt Line D from slot 5 PCI1
|
|
*56 Interrupt Line A from slot 6 PCI1
|
|
*57 Interrupt Line B from slot 6 PCI1
|
|
*58 Interrupt Line C from slot 6 PCI1
|
|
*50 Interrupt Line D from slot 6 PCI1
|
|
*60 Interrupt Line A from slot 7 PCI1
|
|
*61 Interrupt Line B from slot 7 PCI1
|
|
*62 Interrupt Line C from slot 7 PCI1
|
|
*63 Interrupt Line D from slot 7 PCI1
|
|
*
|
|
*
|
|
* IdSel
|
|
* 0 Cypress Bridge I/O (ISA summary interrupt)
|
|
* 1 64 bit PCI 0 option slot 1 (SCSI QLogic builtin)
|
|
* 2 64 bit PCI 0 option slot 2
|
|
* 3 64 bit PCI 0 option slot 3
|
|
* 4 64 bit PCI 1 option slot 4
|
|
* 5 64 bit PCI 1 option slot 5
|
|
* 6 64 bit PCI 1 option slot 6
|
|
* 7 64 bit PCI 1 option slot 7
|
|
*/
|
|
|
|
static int __init
|
|
wildfire_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
|
|
{
|
|
static char irq_tab[8][5] __initdata = {
|
|
/*INT INTA INTB INTC INTD */
|
|
{ -1, -1, -1, -1, -1}, /* IdSel 0 ISA Bridge */
|
|
{ 36, 36, 36+1, 36+2, 36+3}, /* IdSel 1 SCSI builtin */
|
|
{ 40, 40, 40+1, 40+2, 40+3}, /* IdSel 2 PCI 0 slot 2 */
|
|
{ 44, 44, 44+1, 44+2, 44+3}, /* IdSel 3 PCI 0 slot 3 */
|
|
{ 48, 48, 48+1, 48+2, 48+3}, /* IdSel 4 PCI 1 slot 4 */
|
|
{ 52, 52, 52+1, 52+2, 52+3}, /* IdSel 5 PCI 1 slot 5 */
|
|
{ 56, 56, 56+1, 56+2, 56+3}, /* IdSel 6 PCI 1 slot 6 */
|
|
{ 60, 60, 60+1, 60+2, 60+3}, /* IdSel 7 PCI 1 slot 7 */
|
|
};
|
|
long min_idsel = 0, max_idsel = 7, irqs_per_slot = 5;
|
|
|
|
struct pci_controller *hose = dev->sysdata;
|
|
int irq = COMMON_TABLE_LOOKUP;
|
|
|
|
if (irq > 0) {
|
|
int qbbno = hose->index >> 3;
|
|
int pcano = (hose->index >> 1) & 3;
|
|
irq += (qbbno << 8) + (pcano << 6);
|
|
}
|
|
return irq;
|
|
}
|
|
|
|
|
|
/*
|
|
* The System Vectors
|
|
*/
|
|
|
|
struct alpha_machine_vector wildfire_mv __initmv = {
|
|
.vector_name = "WILDFIRE",
|
|
DO_EV6_MMU,
|
|
DO_DEFAULT_RTC,
|
|
DO_WILDFIRE_IO,
|
|
.machine_check = wildfire_machine_check,
|
|
.max_isa_dma_address = ALPHA_MAX_ISA_DMA_ADDRESS,
|
|
.min_io_address = DEFAULT_IO_BASE,
|
|
.min_mem_address = DEFAULT_MEM_BASE,
|
|
|
|
.nr_irqs = WILDFIRE_NR_IRQS,
|
|
.device_interrupt = wildfire_device_interrupt,
|
|
|
|
.init_arch = wildfire_init_arch,
|
|
.init_irq = wildfire_init_irq,
|
|
.init_rtc = common_init_rtc,
|
|
.init_pci = common_init_pci,
|
|
.kill_arch = wildfire_kill_arch,
|
|
.pci_map_irq = wildfire_map_irq,
|
|
.pci_swizzle = common_swizzle,
|
|
|
|
.pa_to_nid = wildfire_pa_to_nid,
|
|
.cpuid_to_nid = wildfire_cpuid_to_nid,
|
|
.node_mem_start = wildfire_node_mem_start,
|
|
.node_mem_size = wildfire_node_mem_size,
|
|
};
|
|
ALIAS_MV(wildfire)
|