354 lines
9 KiB
C
354 lines
9 KiB
C
/*
|
|
* 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_handler_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_handler_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_handler_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_handler_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_handler_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_handler_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 hwcpuid)
|
|
{
|
|
int node, cpu;
|
|
|
|
node = nlm_cpuid_to_node(hwcpuid);
|
|
cpu = hwcpuid % nlm_threads_per_node();
|
|
|
|
if (cpu == 0 && node != 0)
|
|
nlm_init_node_irqs(node);
|
|
write_c0_eimr(nlm_current_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_OF
|
|
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 %s: reg property not found!\n", node->name);
|
|
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 %s: Node mapping for bus %d not found!\n",
|
|
node->name, bus);
|
|
return -EINVAL;
|
|
}
|
|
} else {
|
|
socid = (res.start >> 18) & 0x3;
|
|
if (!nlm_node_present(socid)) {
|
|
pr_err("PIC %s: node %d does not exist!\n",
|
|
node->name, socid);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
if (!nlm_node_present(socid)) {
|
|
pr_err("PIC %s: node %d does not exist!\n", node->name, 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 %s: Creating legacy domain failed!\n", node->name);
|
|
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
|
|
#if defined(CONFIG_OF)
|
|
of_irq_init(xlp_pic_irq_ids);
|
|
#endif
|
|
}
|