This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / arch / mips / emma2rh / markeins / irq.c

diff --git a/arch/mips/emma2rh/markeins/irq.c b/arch/mips/emma2rh/markeins/irq.c
new file mode 100644 (file)
index 0000000..2a736be
--- /dev/null
+++ b/arch/mips/emma2rh/markeins/irq.c
@@ -0,0 +1,133 @@
+/*
+ *  arch/mips/emma2rh/markeins/irq.c
+ *      This file defines the irq handler for EMMA2RH.
+ *
+ *  Copyright (C) NEC Electronics Corporation 2004-2006
+ *
+ *  This file is based on the arch/mips/ddb5xxx/ddb5477/irq.c
+ *
+ *     Copyright 2001 MontaVista Software Inc.
+ *
+ *  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
+ */
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/types.h>
+#include <linux/ptrace.h>
+#include <linux/delay.h>
+
+#include <asm/i8259.h>
+#include <asm/irq_cpu.h>
+#include <asm/system.h>
+#include <asm/mipsregs.h>
+#include <asm/debug.h>
+#include <asm/addrspace.h>
+#include <asm/bootinfo.h>
+
+#include <asm/emma2rh/emma2rh.h>
+
+/*
+ * IRQ mapping
+ *
+ *  0-7: 8 CPU interrupts
+ *     0 -     software interrupt 0
+ *     1 -     software interrupt 1
+ *     2 -     most Vrc5477 interrupts are routed to this pin
+ *     3 -     (optional) some other interrupts routed to this pin for debugg
+ *     4 -     not used
+ *     5 -     not used
+ *     6 -     not used
+ *     7 -     cpu timer (used by default)
+ *
+ */
+
+extern void emma2rh_sw_irq_init(u32 base);
+extern void emma2rh_gpio_irq_init(u32 base);
+extern void emma2rh_irq_init(u32 base);
+extern asmlinkage void emma2rh_irq_dispatch(struct pt_regs *regs);
+
+static struct irqaction irq_cascade = {
+          .handler = no_action,
+          .flags = 0,
+          .mask = CPU_MASK_NONE,
+          .name = "cascade",
+          .dev_id = NULL,
+          .next = NULL,
+};
+
+void __init arch_init_irq(void)
+{
+       u32 reg;
+
+       db_run(printk("markeins_irq_setup invoked.\n"));
+
+       /* by default, interrupts are disabled. */
+       emma2rh_out32(EMMA2RH_BHIF_INT_EN_0, 0);
+       emma2rh_out32(EMMA2RH_BHIF_INT_EN_1, 0);
+       emma2rh_out32(EMMA2RH_BHIF_INT_EN_2, 0);
+       emma2rh_out32(EMMA2RH_BHIF_INT1_EN_0, 0);
+       emma2rh_out32(EMMA2RH_BHIF_INT1_EN_1, 0);
+       emma2rh_out32(EMMA2RH_BHIF_INT1_EN_2, 0);
+       emma2rh_out32(EMMA2RH_BHIF_SW_INT_EN, 0);
+
+       clear_c0_status(0xff00);
+       set_c0_status(0x0400);
+
+#define GPIO_PCI (0xf<<15)
+       /* setup GPIO interrupt for PCI interface */
+       /* direction input */
+       reg = emma2rh_in32(EMMA2RH_GPIO_DIR);
+       emma2rh_out32(EMMA2RH_GPIO_DIR, reg & ~GPIO_PCI);
+       /* disable interrupt */
+       reg = emma2rh_in32(EMMA2RH_GPIO_INT_MASK);
+       emma2rh_out32(EMMA2RH_GPIO_INT_MASK, reg & ~GPIO_PCI);
+       /* level triggerd */
+       reg = emma2rh_in32(EMMA2RH_GPIO_INT_MODE);
+       emma2rh_out32(EMMA2RH_GPIO_INT_MODE, reg | GPIO_PCI);
+       reg = emma2rh_in32(EMMA2RH_GPIO_INT_CND_A);
+       emma2rh_out32(EMMA2RH_GPIO_INT_CND_A, reg & (~GPIO_PCI));
+       /* interrupt clear */
+       emma2rh_out32(EMMA2RH_GPIO_INT_ST, ~GPIO_PCI);
+
+       /* init all controllers */
+       emma2rh_irq_init(EMMA2RH_IRQ_BASE);
+       emma2rh_sw_irq_init(EMMA2RH_SW_IRQ_BASE);
+       emma2rh_gpio_irq_init(EMMA2RH_GPIO_IRQ_BASE);
+       mips_cpu_irq_init(CPU_IRQ_BASE);
+
+       /* setup cascade interrupts */
+       setup_irq(EMMA2RH_IRQ_BASE + EMMA2RH_SW_CASCADE, &irq_cascade);
+       setup_irq(EMMA2RH_IRQ_BASE + EMMA2RH_GPIO_CASCADE, &irq_cascade);
+       setup_irq(CPU_IRQ_BASE + CPU_EMMA2RH_CASCADE, &irq_cascade);
+}
+
+asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
+{
+        unsigned int pending = read_c0_status() & read_c0_cause();
+
+       if (pending & STATUSF_IP7)
+               do_IRQ(CPU_IRQ_BASE + 7, regs);
+       else if (pending & STATUSF_IP2)
+               emma2rh_irq_dispatch(regs);
+       else if (pending & STATUSF_IP1)
+               do_IRQ(CPU_IRQ_BASE + 1, regs);
+       else if (pending & STATUSF_IP0)
+               do_IRQ(CPU_IRQ_BASE + 0, regs);
+       else
+               spurious_interrupt(regs);
+}
+
+