forked from Minki/linux
26dd3e4ff9
Historically a lot of these existed because we did not have a distinction between what was modular code and what was providing support to modules via EXPORT_SYMBOL and friends. That changed when we forked out support for the latter into the export.h file. This means we should be able to reduce the usage of module.h in code that is obj-y Makefile or bool Kconfig. In the case of some code where it is modular, we can extend that to also include files that are building basic support functionality but not related to loading or registering the final module; such files also have no need whatsoever for module.h The advantage in removing such instances is that module.h itself sources about 15 other headers; adding significantly to what we feed cpp, and it can obscure what headers we are effectively using. Since module.h might have been the implicit source for init.h (for __init) and for export.h (for EXPORT_SYMBOL) we consider each instance for the presence of either and replace/add as needed. Also note that MODULE_DEVICE_TABLE is a no-op for non-modular code. Build coverage of all the mips defconfigs revealed the module.h header was masking a couple of implicit include instances, so we add the appropriate headers there. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: David Daney <david.daney@cavium.com> Cc: John Crispin <john@phrozen.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: "Steven J. Hill" <steven.hill@cavium.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/15131/ [james.hogan@imgtec.com: Preserve sort order where it already exists] Signed-off-by: James Hogan <james.hogan@imgtec.com>
131 lines
3.2 KiB
C
131 lines
3.2 KiB
C
/*
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* Copyright (C) 2007 Lemote Inc.
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* Author: Fuxin Zhang, zhangfx@lemote.com
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/export.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <asm/irq_cpu.h>
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#include <asm/i8259.h>
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#include <asm/mipsregs.h>
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#include <loongson.h>
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#include <machine.h>
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#define LOONGSON_TIMER_IRQ (MIPS_CPU_IRQ_BASE + 7) /* cpu timer */
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#define LOONGSON_NORTH_BRIDGE_IRQ (MIPS_CPU_IRQ_BASE + 6) /* bonito */
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#define LOONGSON_UART_IRQ (MIPS_CPU_IRQ_BASE + 3) /* cpu serial port */
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#define LOONGSON_SOUTH_BRIDGE_IRQ (MIPS_CPU_IRQ_BASE + 2) /* i8259 */
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#define LOONGSON_INT_BIT_INT0 (1 << 11)
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#define LOONGSON_INT_BIT_INT1 (1 << 12)
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/*
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* The generic i8259_irq() make the kernel hang on booting. Since we cannot
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* get the irq via the IRR directly, we access the ISR instead.
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*/
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int mach_i8259_irq(void)
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{
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int irq, isr;
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irq = -1;
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if ((LOONGSON_INTISR & LOONGSON_INTEN) & LOONGSON_INT_BIT_INT0) {
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raw_spin_lock(&i8259A_lock);
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isr = inb(PIC_MASTER_CMD) &
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~inb(PIC_MASTER_IMR) & ~(1 << PIC_CASCADE_IR);
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if (!isr)
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isr = (inb(PIC_SLAVE_CMD) & ~inb(PIC_SLAVE_IMR)) << 8;
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irq = ffs(isr) - 1;
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if (unlikely(irq == 7)) {
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/*
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* This may be a spurious interrupt.
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*
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* Read the interrupt status register (ISR). If the most
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* significant bit is not set then there is no valid
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* interrupt.
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*/
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outb(0x0B, PIC_MASTER_ISR); /* ISR register */
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if (~inb(PIC_MASTER_ISR) & 0x80)
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irq = -1;
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}
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raw_spin_unlock(&i8259A_lock);
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}
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return irq;
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}
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EXPORT_SYMBOL(mach_i8259_irq);
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static void i8259_irqdispatch(void)
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{
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int irq;
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irq = mach_i8259_irq();
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if (irq >= 0)
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do_IRQ(irq);
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else
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spurious_interrupt();
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}
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void mach_irq_dispatch(unsigned int pending)
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{
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if (pending & CAUSEF_IP7)
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do_IRQ(LOONGSON_TIMER_IRQ);
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else if (pending & CAUSEF_IP6) { /* North Bridge, Perf counter */
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do_perfcnt_IRQ();
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bonito_irqdispatch();
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} else if (pending & CAUSEF_IP3) /* CPU UART */
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do_IRQ(LOONGSON_UART_IRQ);
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else if (pending & CAUSEF_IP2) /* South Bridge */
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i8259_irqdispatch();
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else
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spurious_interrupt();
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}
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static irqreturn_t ip6_action(int cpl, void *dev_id)
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{
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return IRQ_HANDLED;
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}
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static struct irqaction ip6_irqaction = {
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.handler = ip6_action,
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.name = "cascade",
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.flags = IRQF_SHARED | IRQF_NO_THREAD,
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};
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static struct irqaction cascade_irqaction = {
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.handler = no_action,
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.name = "cascade",
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.flags = IRQF_NO_THREAD,
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};
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void __init mach_init_irq(void)
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{
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/* init all controller
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* 0-15 ------> i8259 interrupt
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* 16-23 ------> mips cpu interrupt
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* 32-63 ------> bonito irq
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*/
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/* setup cs5536 as high level trigger */
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LOONGSON_INTPOL = LOONGSON_INT_BIT_INT0 | LOONGSON_INT_BIT_INT1;
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LOONGSON_INTEDGE &= ~(LOONGSON_INT_BIT_INT0 | LOONGSON_INT_BIT_INT1);
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/* Sets the first-level interrupt dispatcher. */
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mips_cpu_irq_init();
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init_i8259_irqs();
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bonito_irq_init();
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/* setup north bridge irq (bonito) */
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setup_irq(LOONGSON_NORTH_BRIDGE_IRQ, &ip6_irqaction);
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/* setup source bridge irq (i8259) */
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setup_irq(LOONGSON_SOUTH_BRIDGE_IRQ, &cascade_irqaction);
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}
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