diff options
Diffstat (limited to 'arch/mips/netlogic/common/irq.c')
| -rw-r--r-- | arch/mips/netlogic/common/irq.c | 354 |
1 files changed, 0 insertions, 354 deletions
diff --git a/arch/mips/netlogic/common/irq.c b/arch/mips/netlogic/common/irq.c deleted file mode 100644 index cf33dd8a487e..000000000000 --- a/arch/mips/netlogic/common/irq.c +++ /dev/null @@ -1,354 +0,0 @@ -/* - * Copyright 2003-2011 NetLogic Microsystems, Inc. (NetLogic). All rights - * reserved. - * - * This software is available to you under a choice of one of two - * licenses. You may choose to be licensed under the terms of the GNU - * General Public License (GPL) Version 2, available from the file - * COPYING in the main directory of this source tree, or the NetLogic - * license below: - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * - * THIS SOFTWARE IS PROVIDED BY NETLOGIC ``AS IS'' AND ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED - * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL NETLOGIC OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR - * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, - * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE - * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN - * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/linkage.h> -#include <linux/interrupt.h> -#include <linux/mm.h> -#include <linux/slab.h> -#include <linux/irq.h> - -#include <linux/irqdomain.h> -#include <linux/of_address.h> -#include <linux/of_irq.h> - -#include <asm/errno.h> -#include <asm/signal.h> -#include <asm/ptrace.h> -#include <asm/mipsregs.h> -#include <asm/thread_info.h> - -#include <asm/netlogic/mips-extns.h> -#include <asm/netlogic/interrupt.h> -#include <asm/netlogic/haldefs.h> -#include <asm/netlogic/common.h> - -#if defined(CONFIG_CPU_XLP) -#include <asm/netlogic/xlp-hal/iomap.h> -#include <asm/netlogic/xlp-hal/xlp.h> -#include <asm/netlogic/xlp-hal/pic.h> -#elif defined(CONFIG_CPU_XLR) -#include <asm/netlogic/xlr/iomap.h> -#include <asm/netlogic/xlr/pic.h> -#include <asm/netlogic/xlr/fmn.h> -#else -#error "Unknown CPU" -#endif - -#ifdef CONFIG_SMP -#define SMP_IRQ_MASK ((1ULL << IRQ_IPI_SMP_FUNCTION) | \ - (1ULL << IRQ_IPI_SMP_RESCHEDULE)) -#else -#define SMP_IRQ_MASK 0 -#endif -#define PERCPU_IRQ_MASK (SMP_IRQ_MASK | (1ull << IRQ_TIMER) | \ - (1ull << IRQ_FMN)) - -struct nlm_pic_irq { - void (*extra_ack)(struct irq_data *); - struct nlm_soc_info *node; - int picirq; - int irt; - int flags; -}; - -static void xlp_pic_enable(struct irq_data *d) -{ - unsigned long flags; - struct nlm_pic_irq *pd = irq_data_get_irq_chip_data(d); - - BUG_ON(!pd); - spin_lock_irqsave(&pd->node->piclock, flags); - nlm_pic_enable_irt(pd->node->picbase, pd->irt); - spin_unlock_irqrestore(&pd->node->piclock, flags); -} - -static void xlp_pic_disable(struct irq_data *d) -{ - struct nlm_pic_irq *pd = irq_data_get_irq_chip_data(d); - unsigned long flags; - - BUG_ON(!pd); - spin_lock_irqsave(&pd->node->piclock, flags); - nlm_pic_disable_irt(pd->node->picbase, pd->irt); - spin_unlock_irqrestore(&pd->node->piclock, flags); -} - -static void xlp_pic_mask_ack(struct irq_data *d) -{ - struct nlm_pic_irq *pd = irq_data_get_irq_chip_data(d); - - clear_c0_eimr(pd->picirq); - ack_c0_eirr(pd->picirq); -} - -static void xlp_pic_unmask(struct irq_data *d) -{ - struct nlm_pic_irq *pd = irq_data_get_irq_chip_data(d); - - BUG_ON(!pd); - - if (pd->extra_ack) - pd->extra_ack(d); - - /* re-enable the intr on this cpu */ - set_c0_eimr(pd->picirq); - - /* Ack is a single write, no need to lock */ - nlm_pic_ack(pd->node->picbase, pd->irt); -} - -static struct irq_chip xlp_pic = { - .name = "XLP-PIC", - .irq_enable = xlp_pic_enable, - .irq_disable = xlp_pic_disable, - .irq_mask_ack = xlp_pic_mask_ack, - .irq_unmask = xlp_pic_unmask, -}; - -static void cpuintr_disable(struct irq_data *d) -{ - clear_c0_eimr(d->irq); -} - -static void cpuintr_enable(struct irq_data *d) -{ - set_c0_eimr(d->irq); -} - -static void cpuintr_ack(struct irq_data *d) -{ - ack_c0_eirr(d->irq); -} - -/* - * Chip definition for CPU originated interrupts(timer, msg) and - * IPIs - */ -struct irq_chip nlm_cpu_intr = { - .name = "XLP-CPU-INTR", - .irq_enable = cpuintr_enable, - .irq_disable = cpuintr_disable, - .irq_mask = cpuintr_disable, - .irq_ack = cpuintr_ack, - .irq_eoi = cpuintr_enable, -}; - -static void __init nlm_init_percpu_irqs(void) -{ - int i; - - for (i = 0; i < PIC_IRT_FIRST_IRQ; i++) - irq_set_chip_and_handler(i, &nlm_cpu_intr, handle_percpu_irq); -#ifdef CONFIG_SMP - irq_set_chip_and_handler(IRQ_IPI_SMP_FUNCTION, &nlm_cpu_intr, - nlm_smp_function_ipi_handler); - irq_set_chip_and_handler(IRQ_IPI_SMP_RESCHEDULE, &nlm_cpu_intr, - nlm_smp_resched_ipi_handler); -#endif -} - - -void nlm_setup_pic_irq(int node, int picirq, int irq, int irt) -{ - struct nlm_pic_irq *pic_data; - int xirq; - - xirq = nlm_irq_to_xirq(node, irq); - pic_data = kzalloc(sizeof(*pic_data), GFP_KERNEL); - BUG_ON(pic_data == NULL); - pic_data->irt = irt; - pic_data->picirq = picirq; - pic_data->node = nlm_get_node(node); - irq_set_chip_and_handler(xirq, &xlp_pic, handle_level_irq); - irq_set_chip_data(xirq, pic_data); -} - -void nlm_set_pic_extra_ack(int node, int irq, void (*xack)(struct irq_data *)) -{ - struct nlm_pic_irq *pic_data; - int xirq; - - xirq = nlm_irq_to_xirq(node, irq); - pic_data = irq_get_chip_data(xirq); - if (WARN_ON(!pic_data)) - return; - pic_data->extra_ack = xack; -} - -static void nlm_init_node_irqs(int node) -{ - struct nlm_soc_info *nodep; - int i, irt; - - pr_info("Init IRQ for node %d\n", node); - nodep = nlm_get_node(node); - nodep->irqmask = PERCPU_IRQ_MASK; - for (i = PIC_IRT_FIRST_IRQ; i <= PIC_IRT_LAST_IRQ; i++) { - irt = nlm_irq_to_irt(i); - if (irt == -1) /* unused irq */ - continue; - nodep->irqmask |= 1ull << i; - if (irt == -2) /* not a direct PIC irq */ - continue; - - nlm_pic_init_irt(nodep->picbase, irt, i, - node * nlm_threads_per_node(), 0); - nlm_setup_pic_irq(node, i, i, irt); - } -} - -void nlm_smp_irq_init(int hwtid) -{ - int cpu, node; - - cpu = hwtid % nlm_threads_per_node(); - node = hwtid / nlm_threads_per_node(); - - if (cpu == 0 && node != 0) - nlm_init_node_irqs(node); - write_c0_eimr(nlm_get_node(node)->irqmask); -} - -asmlinkage void plat_irq_dispatch(void) -{ - uint64_t eirr; - int i, node; - - node = nlm_nodeid(); - eirr = read_c0_eirr_and_eimr(); - if (eirr == 0) - return; - - i = __ffs64(eirr); - /* per-CPU IRQs don't need translation */ - if (i < PIC_IRQ_BASE) { - do_IRQ(i); - return; - } - -#if defined(CONFIG_PCI_MSI) && defined(CONFIG_CPU_XLP) - /* PCI interrupts need a second level dispatch for MSI bits */ - if (i >= PIC_PCIE_LINK_MSI_IRQ(0) && i <= PIC_PCIE_LINK_MSI_IRQ(3)) { - nlm_dispatch_msi(node, i); - return; - } - if (i >= PIC_PCIE_MSIX_IRQ(0) && i <= PIC_PCIE_MSIX_IRQ(3)) { - nlm_dispatch_msix(node, i); - return; - } - -#endif - /* top level irq handling */ - do_IRQ(nlm_irq_to_xirq(node, i)); -} - -#ifdef CONFIG_CPU_XLP -static const struct irq_domain_ops xlp_pic_irq_domain_ops = { - .xlate = irq_domain_xlate_onetwocell, -}; - -static int __init xlp_of_pic_init(struct device_node *node, - struct device_node *parent) -{ - const int n_picirqs = PIC_IRT_LAST_IRQ - PIC_IRQ_BASE + 1; - struct irq_domain *xlp_pic_domain; - struct resource res; - int socid, ret, bus; - - /* we need a hack to get the PIC's SoC chip id */ - ret = of_address_to_resource(node, 0, &res); - if (ret < 0) { - pr_err("PIC %pOFn: reg property not found!\n", node); - return -EINVAL; - } - - if (cpu_is_xlp9xx()) { - bus = (res.start >> 20) & 0xf; - for (socid = 0; socid < NLM_NR_NODES; socid++) { - if (!nlm_node_present(socid)) - continue; - if (nlm_get_node(socid)->socbus == bus) - break; - } - if (socid == NLM_NR_NODES) { - pr_err("PIC %pOFn: Node mapping for bus %d not found!\n", - node, bus); - return -EINVAL; - } - } else { - socid = (res.start >> 18) & 0x3; - if (!nlm_node_present(socid)) { - pr_err("PIC %pOFn: node %d does not exist!\n", - node, socid); - return -EINVAL; - } - } - - if (!nlm_node_present(socid)) { - pr_err("PIC %pOFn: node %d does not exist!\n", node, socid); - return -EINVAL; - } - - xlp_pic_domain = irq_domain_add_legacy(node, n_picirqs, - nlm_irq_to_xirq(socid, PIC_IRQ_BASE), PIC_IRQ_BASE, - &xlp_pic_irq_domain_ops, NULL); - if (xlp_pic_domain == NULL) { - pr_err("PIC %pOFn: Creating legacy domain failed!\n", node); - return -EINVAL; - } - pr_info("Node %d: IRQ domain created for PIC@%pR\n", socid, &res); - return 0; -} - -static struct of_device_id __initdata xlp_pic_irq_ids[] = { - { .compatible = "netlogic,xlp-pic", .data = xlp_of_pic_init }, - {}, -}; -#endif - -void __init arch_init_irq(void) -{ - /* Initialize the irq descriptors */ - nlm_init_percpu_irqs(); - nlm_init_node_irqs(0); - write_c0_eimr(nlm_current_node()->irqmask); -#if defined(CONFIG_CPU_XLR) - nlm_setup_fmn_irq(); -#endif -#ifdef CONFIG_CPU_XLP - of_irq_init(xlp_pic_irq_ids); -#endif -} |