diff options
Diffstat (limited to 'target/linux/ifxmips/files/arch/mips/danube/interrupt.c')
| -rw-r--r-- | target/linux/ifxmips/files/arch/mips/danube/interrupt.c | 219 |
1 files changed, 0 insertions, 219 deletions
diff --git a/target/linux/ifxmips/files/arch/mips/danube/interrupt.c b/target/linux/ifxmips/files/arch/mips/danube/interrupt.c deleted file mode 100644 index 32ecaa0232..0000000000 --- a/target/linux/ifxmips/files/arch/mips/danube/interrupt.c +++ /dev/null @@ -1,219 +0,0 @@ -/* - * arch/mips/ifxmips/interrupt.c - * - * 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 - * - * Rewrite of Infineon IFXMips code, thanks to infineon for the support, - * software and hardware - * - * 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/ifxmips/ifxmips.h> -#include <asm/ifxmips/ifxmips_irq.h> -#include <asm/irq_cpu.h> - - -void -disable_ifxmips_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){ - writel(readl(ifxmips_ier) & ~(1 << irq_nr ), ifxmips_ier); - return; - } - ifxmips_ier += IFXMIPS_ICU_OFFSET; - irq_nr -= INT_NUM_IM_OFFSET; - } -} -EXPORT_SYMBOL (disable_ifxmips_irq); - -void -mask_and_ack_ifxmips_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) - { - writel(readl(ifxmips_ier) & ~(1 << irq_nr ), ifxmips_ier); - writel((1 << irq_nr ), ifxmips_isr); - return; - } - ifxmips_ier += IFXMIPS_ICU_OFFSET; - ifxmips_isr += IFXMIPS_ICU_OFFSET; - irq_nr -= INT_NUM_IM_OFFSET; - } -} -EXPORT_SYMBOL (mask_and_ack_ifxmips_irq); - -void -enable_ifxmips_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) - { - writel(readl(ifxmips_ier) | (1 << irq_nr ), ifxmips_ier); - return; - } - ifxmips_ier += IFXMIPS_ICU_OFFSET; - irq_nr -= INT_NUM_IM_OFFSET; - } -} -EXPORT_SYMBOL (enable_ifxmips_irq); - -static unsigned int -startup_ifxmips_irq (unsigned int irq) -{ - enable_ifxmips_irq (irq); - return 0; -} - -static void -end_ifxmips_irq (unsigned int irq) -{ - if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS))) - enable_ifxmips_irq (irq); -} - -static struct hw_interrupt_type ifxmips_irq_type = { - "IFXMIPS", - .startup = startup_ifxmips_irq, - .enable = enable_ifxmips_irq, - .disable = disable_ifxmips_irq, - .unmask = enable_ifxmips_irq, - .ack = end_ifxmips_irq, - .mask = disable_ifxmips_irq, - .mask_ack = mask_and_ack_ifxmips_irq, - .end = end_ifxmips_irq, -}; - -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 = readl(IFXMIPS_ICU_IM0_IOSR + (module * IFXMIPS_ICU_OFFSET)); - if (irq == 0) - return; - - irq = ls1bit32 (irq); - do_IRQ ((int) irq + INT_NUM_IM0_IRL0 + (INT_NUM_IM_OFFSET * module)); - - if ((irq == 22) && (module == 0)){ - writel(readl(IFXMIPS_EBU_PCC_ISTAT) | 0x10, IFXMIPS_EBU_PCC_ISTAT); - } -} - -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("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++) - { - writel(0, IFXMIPS_ICU_IM0_IER + (i * IFXMIPS_ICU_OFFSET)); - } - - mips_cpu_irq_init(); - - for (i = 2; i <= 6; i++) - { - setup_irq(i, &cascade); - } - - for (i = INT_NUM_IRQ0; i <= (INT_NUM_IRQ0 + (5 * INT_NUM_IM_OFFSET)); i++) - { -#if 0 - irq_desc[i].status = IRQ_DISABLED; - irq_desc[i].action = NULL; - irq_desc[i].depth = 1; -#endif - set_irq_chip_and_handler(i, &ifxmips_irq_type, handle_level_irq); - } - - set_c0_status (IE_IRQ0 | IE_IRQ1 | IE_IRQ2 | IE_IRQ3 | IE_IRQ4 | IE_IRQ5); -} |