// 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)