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/* Copyright 2016 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/* Helper to declare IRQ handling routines */
#ifndef __CROS_EC_IRQ_HANDLER_H
#define __CROS_EC_IRQ_HANDLER_H
#include "registers.h"
#include "task.h"
#include "task_defs.h"
asm(".include \"core/minute-ia/irq_handler_common.S\"");
/* Helper macros to build the IRQ handler and priority struct names */
#define IRQ_HANDLER(irqname) CONCAT3(_irq_, irqname, _handler)
#define IRQ_PRIORITY(irqname) CONCAT2(prio_, irqname)
/*
* Macro to connect the interrupt handler "routine" to the irq number "irq" and
* ensure it is enabled in the interrupt controller with the right priority.
*
* Note: No 'naked' function support for x86, so function is implemented within
* __asm__
* Note: currently we don't allow nested irq handling
*/
#define DECLARE_IRQ(irq, routine) DECLARE_IRQ_(irq, routine, irq + 32 + 10)
/*
* Each irq has a irq_data structure placed in .rodata.irqs section,
* to be used for dynamically setting up interrupt gates
*/
#define DECLARE_IRQ_(irq_, routine_, vector) \
static void __keep routine_(void); \
void IRQ_HANDLER(irq_)(void); \
__asm__(".section .rodata.irqs\n"); \
const struct irq_def __keep CONCAT4(__irq_, irq_, _, routine_) \
__attribute__((section( \
".rodata.irqs"))) = { .irq = irq_, \
.routine = routine_, \
.handler = IRQ_HANDLER(irq_) }; \
__asm__(".section .text._irq_" #irq_ "_handler\n" \
"_irq_" #irq_ "_handler:\n" \
"pusha\n" ASM_LOCK_PREFIX "addl $1, __in_isr\n" \
"irq_handler_common $0 $0 $" #irq_ "\n" \
"movl $" #vector ", " STRINGIFY( \
IOAPIC_EOI_REG_ADDR) "\n" \
"movl $0x00, " STRINGIFY( \
LAPIC_EOI_REG_ADDR) "\n" ASM_LOCK_PREFIX \
"subl $1, __in_isr\n" \
"popa\n" \
"iret\n")
#endif /* __CROS_EC_IRQ_HANDLER_H */
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