diff options
Diffstat (limited to 'arch/mips/basler/excite/excite_irq.c')
| -rw-r--r-- | arch/mips/basler/excite/excite_irq.c | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/arch/mips/basler/excite/excite_irq.c b/arch/mips/basler/excite/excite_irq.c new file mode 100644 index 00000000000000..511ad8730f548e --- /dev/null +++ b/arch/mips/basler/excite/excite_irq.c @@ -0,0 +1,129 @@ +/* + * Copyright (C) by Basler Vision Technologies AG + * Author: Thomas Koeller <thomas.koeller@baslereb.com> + * + * 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/errno.h> +#include <linux/init.h> +#include <linux/kernel_stat.h> +#include <linux/module.h> +#include <linux/signal.h> +#include <linux/sched.h> +#include <linux/types.h> +#include <linux/interrupt.h> +#include <linux/ioport.h> +#include <linux/timex.h> +#include <linux/slab.h> +#include <linux/random.h> +#include <asm/bitops.h> +#include <asm/bootinfo.h> +#include <asm/io.h> +#include <asm/irq.h> +#include <asm/irq_cpu.h> +#include <asm/mipsregs.h> +#include <asm/system.h> +#include <asm/rm9k-ocd.h> + +#include <excite.h> + +extern asmlinkage void excite_handle_int(void); + +/* + * Initialize the interrupt handler + */ +void __init arch_init_irq(void) +{ + mips_cpu_irq_init(0); + rm7k_cpu_irq_init(8); + rm9k_cpu_irq_init(12); + +#ifdef CONFIG_KGDB + excite_kgdb_init(); +#endif +} + +asmlinkage void plat_irq_dispatch(struct pt_regs *regs) +{ + const u32 + interrupts = read_c0_cause() >> 8, + mask = ((read_c0_status() >> 8) & 0x000000ff) | + (read_c0_intcontrol() & 0x0000ff00), + pending = interrupts & mask; + u32 msgintflags, msgintmask, msgint; + + /* process timer interrupt */ + if (pending & (1 << TIMER_IRQ)) { + do_IRQ(TIMER_IRQ, regs); + return; + } + + /* Process PCI interrupts */ +#if USB_IRQ < 10 + msgintflags = ocd_readl(INTP0Status0 + (USB_MSGINT / 0x20 * 0x10)); + msgintmask = ocd_readl(INTP0Mask0 + (USB_MSGINT / 0x20 * 0x10)); + msgint = msgintflags & msgintmask & (0x1 << (USB_MSGINT % 0x20)); + if ((pending & (1 << USB_IRQ)) && msgint) { +#else + if (pending & (1 << USB_IRQ)) { +#endif + do_IRQ(USB_IRQ, regs); + return; + } + + /* Process TITAN interrupts */ + msgintflags = ocd_readl(INTP0Status0 + (TITAN_MSGINT / 0x20 * 0x10)); + msgintmask = ocd_readl(INTP0Mask0 + (TITAN_MSGINT / 0x20 * 0x10)); + msgint = msgintflags & msgintmask & (0x1 << (TITAN_MSGINT % 0x20)); + if ((pending & (1 << TITAN_IRQ)) && msgint) { + ocd_writel(msgint, INTP0Clear0 + (TITAN_MSGINT / 0x20 * 0x10)); +#if defined(CONFIG_KGDB) + excite_kgdb_inthdl(regs); +#endif + do_IRQ(TITAN_IRQ, regs); + return; + } + + /* Process FPGA line #0 interrupts */ + msgintflags = ocd_readl(INTP0Status0 + (FPGA0_MSGINT / 0x20 * 0x10)); + msgintmask = ocd_readl(INTP0Mask0 + (FPGA0_MSGINT / 0x20 * 0x10)); + msgint = msgintflags & msgintmask & (0x1 << (FPGA0_MSGINT % 0x20)); + if ((pending & (1 << FPGA0_IRQ)) && msgint) { + do_IRQ(FPGA0_IRQ, regs); + return; + } + + /* Process FPGA line #1 interrupts */ + msgintflags = ocd_readl(INTP0Status0 + (FPGA1_MSGINT / 0x20 * 0x10)); + msgintmask = ocd_readl(INTP0Mask0 + (FPGA1_MSGINT / 0x20 * 0x10)); + msgint = msgintflags & msgintmask & (0x1 << (FPGA1_MSGINT % 0x20)); + if ((pending & (1 << FPGA1_IRQ)) && msgint) { + do_IRQ(FPGA1_IRQ, regs); + return; + } + + /* Process PHY interrupts */ + msgintflags = ocd_readl(INTP0Status0 + (PHY_MSGINT / 0x20 * 0x10)); + msgintmask = ocd_readl(INTP0Mask0 + (PHY_MSGINT / 0x20 * 0x10)); + msgint = msgintflags & msgintmask & (0x1 << (PHY_MSGINT % 0x20)); + if ((pending & (1 << PHY_IRQ)) && msgint) { + do_IRQ(PHY_IRQ, regs); + return; + } + + /* Process spurious interrupts */ + spurious_interrupt(regs); +} |