sys_wildfire.c
上传用户:jlfgdled
上传日期:2013-04-10
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文件大小:9k
- /*
- * 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 <asm/ptrace.h>
- #include <asm/system.h>
- #include <asm/dma.h>
- #include <asm/irq.h>
- #include <asm/bitops.h>
- #include <asm/mmu_context.h>
- #include <asm/io.h>
- #include <asm/pgtable.h>
- #include <asm/core_wildfire.h>
- #include <asm/hwrpb.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)];
- spinlock_t wildfire_irq_lock = SPIN_LOCK_UNLOCKED;
- 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 %dn", 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 */
- };
- const 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,
- DO_WILDFIRE_BUS,
- machine_check: wildfire_machine_check,
- max_dma_address: ALPHA_MAX_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,
- };
- ALIAS_MV(wildfire)