mirror of
https://github.com/zephyrproject-rtos/zephyr
synced 2025-08-17 21:56:05 +00:00
f32eeba925
For HPET devices, configure it with fixed delivery mode because HPET timer interrupt is needed to fuel the scheduler for all CPUS. For all other type of devices, like UART, I2C, GPIO, Ethernet, etc. configure them as lowest priority delivery mode, in which IO APIC delivers the interrupt to the processor core that is executing at the lowest priority among all the processors listed in the specified destination. In this case, the device drivers can avoid the trouble of handling repeated interrupts delivered to all CPUS. Signed-off-by: Zide Chen <zide.chen@intel.com>
32 lines
1.4 KiB
C
32 lines
1.4 KiB
C
/*
|
|
* Copyright (c) 2017 Linaro Limited
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
#ifndef ZEPHYR_INCLUDE_DT_BINDINGS_INTERRUPT_CONTROLLER_INTEL_IOAPIC_H_
|
|
#define ZEPHYR_INCLUDE_DT_BINDINGS_INTERRUPT_CONTROLLER_INTEL_IOAPIC_H_
|
|
|
|
#define IRQ_TYPE_LEVEL 0x00008000
|
|
#define IRQ_TYPE_EDGE 0x00000000
|
|
#define IRQ_TYPE_LOW 0x00002000
|
|
#define IRQ_TYPE_HIGH 0x00000000
|
|
#define IRQ_DELIVERY_LOWEST 0x00000100
|
|
#define IRQ_DELIVERY_FIXED 0x00000000
|
|
|
|
/*
|
|
* for most device interrupts, lowest priority delivery is preferred
|
|
* since this ensures only one CPU gets the interrupt in SMP systems.
|
|
*/
|
|
#define IRQ_TYPE_LOWEST_EDGE_RISING (IRQ_DELIVERY_LOWEST | IRQ_TYPE_EDGE | IRQ_TYPE_HIGH)
|
|
#define IRQ_TYPE_LOWEST_EDGE_FALLING (IRQ_DELIVERY_LOWEST | IRQ_TYPE_EDGE | IRQ_TYPE_LOW)
|
|
#define IRQ_TYPE_LOWEST_LEVEL_HIGH (IRQ_DELIVERY_LOWEST | IRQ_TYPE_LEVEL | IRQ_TYPE_HIGH)
|
|
#define IRQ_TYPE_LOWEST_LEVEL_LOW (IRQ_DELIVERY_LOWEST | IRQ_TYPE_LEVEL | IRQ_TYPE_LOW)
|
|
|
|
/* for interrupts that want to be delivered to all CPUs, e.g. HPET */
|
|
#define IRQ_TYPE_FIXED_EDGE_RISING (IRQ_DELIVERY_FIXED | IRQ_TYPE_EDGE | IRQ_TYPE_HIGH)
|
|
#define IRQ_TYPE_FIXED_EDGE_FALLING (IRQ_DELIVERY_FIXED | IRQ_TYPE_EDGE | IRQ_TYPE_LOW)
|
|
#define IRQ_TYPE_FIXED_LEVEL_HIGH (IRQ_DELIVERY_FIXED | IRQ_TYPE_LEVEL | IRQ_TYPE_HIGH)
|
|
#define IRQ_TYPE_FIXED_LEVEL_LOW (IRQ_DELIVERY_FIXED | IRQ_TYPE_LEVEL | IRQ_TYPE_LOW)
|
|
|
|
#endif
|