mirror of
https://github.com/zephyrproject-rtos/zephyr
synced 2025-08-19 04:35:22 +00:00
b43758d22a
We are interested in supporting some XIP x86 platforms which are unable to fetch CPU instructions from system RAM. This requires refactoring our dynamic IRQ/exc code which currently synthesizes assembly language instructions to create IRQ stubs on-the-fly. Instead, a new approach is taken. Given that the configuration at build time specifies the number of required stubs, use this to generate a build time a set of tiny stub functions which simply push a 'stub id' and then call common dynamic interrupt code. The handler function and handler argument is saved in a table keyed by this stub id. CONFIG_EOI_HANDLER_SUPPORTED removed, the code hasn't been conditionally compiled for some time and in all cases we call _loapic_eoi() when finished with an interrupt. Some other out-of-date verbiage in comments related to supporting non-APIC removed. Previously, when dynamic exceptions were created a pointer would be passed in by the caller reserving ram for the stub code. Since this is no longer feasible, two new Kconfig options have been added. CONFIG_NUM_DYNAMIC_EXC_STUBS and CONFIG_NUM_DYNAMIC_EXC_NO_ERR_STUBS control how many stubs are created for exceptions that push an error code, and no error code, respectively. SW Interrupts are no longer triggered by "int <vector>" hard-coded assembly instructions. Instead this is done by sending a self-directed inter-processor interrupt from the LOAPIC, using a new API loapic_int_vect_trigger(). In this way we get rid of dynamically generated code in irq_test_common.h. All interrupts call _loapic_eoi() when finished, since this is now the right thing to do for all IRQs, including SW interrupts. _irq_handler_set() for x86 no longer requires the old function pointer to be supplied. Change-Id: I78993d3d00dd153c9051c518b417cce8d3acee9e Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
65 lines
1.8 KiB
C
65 lines
1.8 KiB
C
/* ioapic.h - public IOAPIC APIs */
|
|
|
|
/*
|
|
* Copyright (c) 2012-2015 Wind River Systems, Inc.
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#ifndef __INCioapich
|
|
#define __INCioapich
|
|
|
|
#include <drivers/loapic.h>
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/*
|
|
* Redirection table entry bits: lower 32 bit
|
|
* Used as flags argument in ioapic_irq_set
|
|
*/
|
|
|
|
#define IOAPIC_INT_MASK 0x00010000
|
|
#define IOAPIC_TRIGGER_MASK 0x00008000
|
|
#define IOAPIC_LEVEL 0x00008000
|
|
#define IOAPIC_EDGE 0x00000000
|
|
#define IOAPIC_REMOTE 0x00004000
|
|
#define IOAPIC_LOW 0x00002000
|
|
#define IOAPIC_HIGH 0x00000000
|
|
#define IOAPIC_LOGICAL 0x00000800
|
|
#define IOAPIC_PHYSICAL 0x00000000
|
|
#define IOAPIC_FIXED 0x00000000
|
|
#define IOAPIC_LOWEST 0x00000100
|
|
#define IOAPIC_SMI 0x00000200
|
|
#define IOAPIC_NMI 0x00000400
|
|
#define IOAPIC_INIT 0x00000500
|
|
#define IOAPIC_EXTINT 0x00000700
|
|
|
|
#ifdef _ASMLANGUAGE
|
|
#define ioapic_mkstub loapic_mkstub
|
|
#else /* _ASMLANGUAGE */
|
|
#include <device.h>
|
|
int _ioapic_init(struct device *unused);
|
|
void _ioapic_irq_enable(unsigned int irq);
|
|
void _ioapic_irq_disable(unsigned int irq);
|
|
void _ioapic_int_vec_set(unsigned int irq, unsigned int vector);
|
|
void _ioapic_irq_set(unsigned int irq, unsigned int vector, uint32_t flags);
|
|
#endif /* _ASMLANGUAGE */
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* __INCioapich */
|