| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * 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/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(struct irq_data *d) |
| { |
| unsigned int irq = d->irq; |
| |
| if (irq < 16) |
| i8259a_enable_irq(d); |
| |
| 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(struct irq_data *d) |
| { |
| unsigned int irq = d->irq; |
| |
| if (irq < 16) |
| i8259a_disable_irq(d); |
| |
| 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(struct irq_data *d) |
| { |
| unsigned int irq = d->irq; |
| |
| if (irq < 16) |
| i8259a_mask_and_ack_irq(d); |
| |
| spin_lock(&wildfire_irq_lock); |
| clear_bit(irq, &cached_irq_mask); |
| wildfire_update_irq_hw(irq); |
| spin_unlock(&wildfire_irq_lock); |
| } |
| |
| static struct irq_chip wildfire_irq_type = { |
| .name = "WILDFIRE", |
| .irq_unmask = wildfire_enable_irq, |
| .irq_mask = wildfire_disable_irq, |
| .irq_mask_ack = wildfire_mask_and_ack_irq, |
| }; |
| |
| static void __init |
| wildfire_init_irq_per_pca(int qbbno, int pcano) |
| { |
| int i, irq_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; |
| |
| #if 0 |
| unsigned long io_bias; |
| |
| /* Only need the following for first PCI bus per PCA. */ |
| io_bias = WILDFIRE_IO(qbbno, pcano<<1) - WILDFIRE_IO_BIAS; |
| |
| 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_set_chip_and_handler(i + irq_bias, &wildfire_irq_type, |
| handle_level_irq); |
| irq_set_status_flags(i + irq_bias, IRQ_LEVEL); |
| } |
| |
| irq_set_chip_and_handler(36 + irq_bias, &wildfire_irq_type, |
| handle_level_irq); |
| irq_set_status_flags(36 + irq_bias, IRQ_LEVEL); |
| for (i = 40; i < 64; ++i) { |
| irq_set_chip_and_handler(i + irq_bias, &wildfire_irq_type, |
| handle_level_irq); |
| irq_set_status_flags(i + irq_bias, IRQ_LEVEL); |
| } |
| |
| 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) |
| { |
| 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); |
| 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 |
| wildfire_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) |
| { |
| static char irq_tab[8][5] = { |
| /*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) |