+++ /dev/null
-/*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (C) 2005 Wu Qi Ming infineon
- * Copyright (C) 2007 John Crispin <blogic@openwrt.org>
- */
-
-#include <linux/init.h>
-#include <linux/sched.h>
-#include <linux/slab.h>
-#include <linux/interrupt.h>
-#include <linux/kernel_stat.h>
-#include <linux/module.h>
-
-#include <asm/bootinfo.h>
-#include <asm/irq.h>
-#include <asm/irq_cpu.h>
-
-#include <ifxmips.h>
-#include <ifxmips_irq.h>
-
-void ifxmips_disable_irq(unsigned int irq_nr)
-{
- int i;
- u32 *ifxmips_ier = IFXMIPS_ICU_IM0_IER;
-
- irq_nr -= INT_NUM_IRQ0;
- for (i = 0; i <= 4; i++) {
- if (irq_nr < INT_NUM_IM_OFFSET) {
- ifxmips_w32(ifxmips_r32(ifxmips_ier) & ~(1 << irq_nr),
- ifxmips_ier);
- return;
- }
- ifxmips_ier += IFXMIPS_ICU_OFFSET;
- irq_nr -= INT_NUM_IM_OFFSET;
- }
-}
-EXPORT_SYMBOL(ifxmips_disable_irq);
-
-void ifxmips_mask_and_ack_irq(unsigned int irq_nr)
-{
- int i;
- u32 *ifxmips_ier = IFXMIPS_ICU_IM0_IER;
- u32 *ifxmips_isr = IFXMIPS_ICU_IM0_ISR;
-
- irq_nr -= INT_NUM_IRQ0;
- for (i = 0; i <= 4; i++) {
- if (irq_nr < INT_NUM_IM_OFFSET) {
- ifxmips_w32(ifxmips_r32(ifxmips_ier) & ~(1 << irq_nr),
- ifxmips_ier);
- ifxmips_w32((1 << irq_nr), ifxmips_isr);
- return;
- }
- ifxmips_ier += IFXMIPS_ICU_OFFSET;
- ifxmips_isr += IFXMIPS_ICU_OFFSET;
- irq_nr -= INT_NUM_IM_OFFSET;
- }
-}
-EXPORT_SYMBOL(ifxmips_mask_and_ack_irq);
-
-void ifxmips_enable_irq(unsigned int irq_nr)
-{
- int i;
- u32 *ifxmips_ier = IFXMIPS_ICU_IM0_IER;
-
- irq_nr -= INT_NUM_IRQ0;
- for (i = 0; i <= 4; i++) {
- if (irq_nr < INT_NUM_IM_OFFSET) {
- ifxmips_w32(ifxmips_r32(ifxmips_ier) | (1 << irq_nr),
- ifxmips_ier);
- return;
- }
- ifxmips_ier += IFXMIPS_ICU_OFFSET;
- irq_nr -= INT_NUM_IM_OFFSET;
- }
-}
-EXPORT_SYMBOL(ifxmips_enable_irq);
-
-static unsigned int ifxmips_startup_irq(unsigned int irq)
-{
- ifxmips_enable_irq(irq);
- return 0;
-}
-
-static void ifxmips_end_irq(unsigned int irq)
-{
- if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS)))
- ifxmips_enable_irq(irq);
-}
-
-static struct hw_interrupt_type ifxmips_irq_type = {
- "IFXMIPS",
- .startup = ifxmips_startup_irq,
- .enable = ifxmips_enable_irq,
- .disable = ifxmips_disable_irq,
- .unmask = ifxmips_enable_irq,
- .ack = ifxmips_end_irq,
- .mask = ifxmips_disable_irq,
- .mask_ack = ifxmips_mask_and_ack_irq,
- .end = ifxmips_end_irq,
-};
-
-/* silicon bug causes only the msb set to 1 to be valid. all
- other bits might be bogus */
-static inline int ls1bit32(unsigned long x)
-{
- __asm__ (
- ".set push \n"
- ".set mips32 \n"
- "clz %0, %1 \n"
- ".set pop \n"
- : "=r" (x)
- : "r" (x));
- return 31 - x;
-}
-
-void ifxmips_hw_irqdispatch(int module)
-{
- u32 irq;
-
- irq = ifxmips_r32(IFXMIPS_ICU_IM0_IOSR + (module * IFXMIPS_ICU_OFFSET));
- if (irq == 0)
- return;
-
- /* we need to do this due to a silicon bug */
- irq = ls1bit32(irq);
- do_IRQ((int)irq + INT_NUM_IM0_IRL0 + (INT_NUM_IM_OFFSET * module));
-
- if ((irq == 22) && (module == 0))
- ifxmips_w32(ifxmips_r32(IFXMIPS_EBU_PCC_ISTAT) | 0x10,
- IFXMIPS_EBU_PCC_ISTAT);
-}
-
-#ifdef CONFIG_CPU_MIPSR2_IRQ_VI
-#define DEFINE_HWx_IRQDISPATCH(x) \
-static void ifxmips_hw ## x ## _irqdispatch(void)\
-{\
- ifxmips_hw_irqdispatch(x); \
-}
-static void ifxmips_hw5_irqdispatch(void)
-{
- do_IRQ(MIPS_CPU_TIMER_IRQ);
-}
-DEFINE_HWx_IRQDISPATCH(0)
-DEFINE_HWx_IRQDISPATCH(1)
-DEFINE_HWx_IRQDISPATCH(2)
-DEFINE_HWx_IRQDISPATCH(3)
-DEFINE_HWx_IRQDISPATCH(4)
-/*DEFINE_HWx_IRQDISPATCH(5)*/
-#endif /* #ifdef CONFIG_CPU_MIPSR2_IRQ_VI */
-
-asmlinkage void plat_irq_dispatch(void)
-{
- unsigned int pending = read_c0_status() & read_c0_cause() & ST0_IM;
- unsigned int i;
-
- if (pending & CAUSEF_IP7) {
- do_IRQ(MIPS_CPU_TIMER_IRQ);
- goto out;
- } else {
- for (i = 0; i < 5; i++) {
- if (pending & (CAUSEF_IP2 << i)) {
- ifxmips_hw_irqdispatch(i);
- goto out;
- }
- }
- }
- printk(KERN_ALERT "Spurious IRQ: CAUSE=0x%08x\n", read_c0_status());
-
-out:
- return;
-}
-
-static struct irqaction cascade = {
- .handler = no_action,
- .flags = IRQF_DISABLED,
- .name = "cascade",
-};
-
-void __init arch_init_irq(void)
-{
- int i;
-
- for (i = 0; i < 5; i++)
- ifxmips_w32(0, IFXMIPS_ICU_IM0_IER + (i * IFXMIPS_ICU_OFFSET));
-
- mips_cpu_irq_init();
-
- for (i = 2; i <= 6; i++)
- setup_irq(i, &cascade);
-
-#ifdef CONFIG_CPU_MIPSR2_IRQ_VI
- if (cpu_has_vint) {
- printk(KERN_INFO "Setting up vectored interrupts\n");
- set_vi_handler(2, ifxmips_hw0_irqdispatch);
- set_vi_handler(3, ifxmips_hw1_irqdispatch);
- set_vi_handler(4, ifxmips_hw2_irqdispatch);
- set_vi_handler(5, ifxmips_hw3_irqdispatch);
- set_vi_handler(6, ifxmips_hw4_irqdispatch);
- set_vi_handler(7, ifxmips_hw5_irqdispatch);
- }
-#endif /* CONFIG_CPU_MIPSR2_IRQ_VI */
-
- for (i = INT_NUM_IRQ0; i <= (INT_NUM_IRQ0 + (5 * INT_NUM_IM_OFFSET));
- i++)
- set_irq_chip_and_handler(i, &ifxmips_irq_type,
- handle_level_irq);
-
- #if !defined(CONFIG_MIPS_MT_SMP) && !defined(CONFIG_MIPS_MT_SMTC)
- set_c0_status(IE_IRQ0 | IE_IRQ1 | IE_IRQ2 |
- IE_IRQ3 | IE_IRQ4 | IE_IRQ5);
- #else
- set_c0_status(IE_SW0 | IE_SW1 | IE_IRQ0 | IE_IRQ1 |
- IE_IRQ2 | IE_IRQ3 | IE_IRQ4 | IE_IRQ5);
- #endif
-}
-
-void __cpuinit arch_fixup_c0_irqs(void)
-{
- /* FIXME: check for CPUID and only do fix for specific chips/versions */
- cp0_compare_irq = CP0_LEGACY_COMPARE_IRQ;
- cp0_perfcount_irq = CP0_LEGACY_PERFCNT_IRQ;
-}
projects / openwrt / openwrt.git / blobdiff