diff options
Diffstat (limited to 'arch/mips/kernel/irq-mv6434x.c')
| -rw-r--r-- | arch/mips/kernel/irq-mv6434x.c | 161 |
1 files changed, 0 insertions, 161 deletions
diff --git a/arch/mips/kernel/irq-mv6434x.c b/arch/mips/kernel/irq-mv6434x.c deleted file mode 100644 index 088bbbc869e..00000000000 --- a/arch/mips/kernel/irq-mv6434x.c +++ /dev/null @@ -1,161 +0,0 @@ -/* - * Copyright 2002 Momentum Computer - * Author: mdharm@momenco.com - * Copyright (C) 2004 Ralf Baechle <ralf@linux-mips.org> - * - * 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. - */ -#include <linux/module.h> -#include <linux/interrupt.h> -#include <linux/kernel.h> -#include <asm/ptrace.h> -#include <linux/sched.h> -#include <linux/kernel_stat.h> -#include <asm/io.h> -#include <asm/irq.h> -#include <linux/mv643xx.h> - -static unsigned int irq_base; - -static inline int ls1bit32(unsigned int x) -{ - int b = 31, s; - - s = 16; if (x << 16 == 0) s = 0; b -= s; x <<= s; - s = 8; if (x << 8 == 0) s = 0; b -= s; x <<= s; - s = 4; if (x << 4 == 0) s = 0; b -= s; x <<= s; - s = 2; if (x << 2 == 0) s = 0; b -= s; x <<= s; - s = 1; if (x << 1 == 0) s = 0; b -= s; - - return b; -} - -/* mask off an interrupt -- 1 is enable, 0 is disable */ -static inline void mask_mv64340_irq(unsigned int irq) -{ - uint32_t value; - - if (irq < (irq_base + 32)) { - value = MV_READ(MV64340_INTERRUPT0_MASK_0_LOW); - value &= ~(1 << (irq - irq_base)); - MV_WRITE(MV64340_INTERRUPT0_MASK_0_LOW, value); - } else { - value = MV_READ(MV64340_INTERRUPT0_MASK_0_HIGH); - value &= ~(1 << (irq - irq_base - 32)); - MV_WRITE(MV64340_INTERRUPT0_MASK_0_HIGH, value); - } -} - -/* unmask an interrupt -- 1 is enable, 0 is disable */ -static inline void unmask_mv64340_irq(unsigned int irq) -{ - uint32_t value; - - if (irq < (irq_base + 32)) { - value = MV_READ(MV64340_INTERRUPT0_MASK_0_LOW); - value |= 1 << (irq - irq_base); - MV_WRITE(MV64340_INTERRUPT0_MASK_0_LOW, value); - } else { - value = MV_READ(MV64340_INTERRUPT0_MASK_0_HIGH); - value |= 1 << (irq - irq_base - 32); - MV_WRITE(MV64340_INTERRUPT0_MASK_0_HIGH, value); - } -} - -/* - * Enables the IRQ on Marvell Chip - */ -static void enable_mv64340_irq(unsigned int irq) -{ - unmask_mv64340_irq(irq); -} - -/* - * Initialize the IRQ on Marvell Chip - */ -static unsigned int startup_mv64340_irq(unsigned int irq) -{ - unmask_mv64340_irq(irq); - return 0; -} - -/* - * Disables the IRQ on Marvell Chip - */ -static void disable_mv64340_irq(unsigned int irq) -{ - mask_mv64340_irq(irq); -} - -/* - * Masks and ACKs an IRQ - */ -static void mask_and_ack_mv64340_irq(unsigned int irq) -{ - mask_mv64340_irq(irq); -} - -/* - * End IRQ processing - */ -static void end_mv64340_irq(unsigned int irq) -{ - if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS))) - unmask_mv64340_irq(irq); -} - -/* - * Interrupt handler for interrupts coming from the Marvell chip. - * It could be built in ethernet ports etc... - */ -void ll_mv64340_irq(struct pt_regs *regs) -{ - unsigned int irq_src_low, irq_src_high; - unsigned int irq_mask_low, irq_mask_high; - - /* read the interrupt status registers */ - irq_mask_low = MV_READ(MV64340_INTERRUPT0_MASK_0_LOW); - irq_mask_high = MV_READ(MV64340_INTERRUPT0_MASK_0_HIGH); - irq_src_low = MV_READ(MV64340_MAIN_INTERRUPT_CAUSE_LOW); - irq_src_high = MV_READ(MV64340_MAIN_INTERRUPT_CAUSE_HIGH); - - /* mask for just the interrupts we want */ - irq_src_low &= irq_mask_low; - irq_src_high &= irq_mask_high; - - if (irq_src_low) - do_IRQ(ls1bit32(irq_src_low) + irq_base, regs); - else - do_IRQ(ls1bit32(irq_src_high) + irq_base + 32, regs); -} - -#define shutdown_mv64340_irq disable_mv64340_irq - -struct hw_interrupt_type mv64340_irq_type = { - "MV-64340", - startup_mv64340_irq, - shutdown_mv64340_irq, - enable_mv64340_irq, - disable_mv64340_irq, - mask_and_ack_mv64340_irq, - end_mv64340_irq, - NULL -}; - -void __init mv64340_irq_init(unsigned int base) -{ - int i; - - /* Reset irq handlers pointers to NULL */ - for (i = base; i < base + 64; i++) { - irq_desc[i].status = IRQ_DISABLED; - irq_desc[i].action = 0; - irq_desc[i].depth = 2; - irq_desc[i].handler = &mv64340_irq_type; - } - - irq_base = base; -} |