nuttx/arch/x86_64/include/irq.h
p-szafonimateusz 0659b333b4 arch/x86_64/intel64: add MSI/MSI-X support
Add MSI and MSI-X support for intel64

Signed-off-by: p-szafonimateusz <p-szafonimateusz@xiaomi.com>
2024-09-13 09:42:08 +08:00

170 lines
4.7 KiB
C

/****************************************************************************
* arch/x86_64/include/irq.h
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you 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.
*
****************************************************************************/
/* This file should never be included directly but, rather, only indirectly
* through nuttx/irq.h
*/
#ifndef __ARCH_X86_64_INCLUDE_IRQ_H
#define __ARCH_X86_64_INCLUDE_IRQ_H
/****************************************************************************
* Included Files
****************************************************************************/
/* Include NuttX-specific IRQ definitions */
#include <nuttx/irq.h>
/* Include chip-specific IRQ definitions (including IRQ numbers) */
#include <arch/chip/irq.h>
/* Include architecture-specific IRQ definitions (including register save
* structure and up_irq_save()/up_irq_restore() macros).
*/
#ifdef CONFIG_ARCH_INTEL64
# include <arch/intel64/irq.h>
#endif
/****************************************************************************
* Public Data
****************************************************************************/
#ifndef __ASSEMBLY__
/* CPU private data */
struct intel64_cpu_s
{
int id;
uint8_t loapic_id;
bool ready;
/* current_regs holds a references to the current interrupt level
* register storage structure. If is non-NULL only during interrupt
* processing. Access to current_regs must be through
* up_current_regs() and up_set_current_regs() functions
*/
uint64_t *current_regs;
};
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
#ifdef __cplusplus
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif
/****************************************************************************
* Name: up_cpu_index
*
* Description:
* Return an index in the range of 0 through (CONFIG_SMP_NCPUS-1) that
* corresponds to the currently executing CPU.
*
* Input Parameters:
* None
*
* Returned Value:
* An integer index in the range of 0 through (CONFIG_SMP_NCPUS-1) that
* corresponds to the currently executing CPU.
*
****************************************************************************/
#ifdef CONFIG_SMP
static inline_function int up_cpu_index(void)
{
int cpu;
__asm__ volatile(
"\tmovl %%gs:(%c1), %0\n"
: "=r" (cpu)
: "i" (offsetof(struct intel64_cpu_s, id))
:);
return cpu;
}
#else
# define up_cpu_index() (0)
#endif
/****************************************************************************
* Inline functions
****************************************************************************/
static inline_function uint64_t *up_current_regs(void)
{
uint64_t *regs;
__asm__ volatile("movq %%gs:(%c1), %0"
: "=rm" (regs)
: "i" (offsetof(struct intel64_cpu_s, current_regs)));
return regs;
}
static inline_function void up_set_current_regs(uint64_t *regs)
{
__asm__ volatile("movq %0, %%gs:(%c1)"
:: "r" (regs), "i" (offsetof(struct intel64_cpu_s,
current_regs)));
}
/****************************************************************************
* Name: up_interrupt_context
*
* Description:
* Return true is we are currently executing in the interrupt handler
* context.
*
****************************************************************************/
noinstrument_function
static inline_function bool up_interrupt_context(void)
{
return up_current_regs() != NULL;
}
/****************************************************************************
* Name: up_alloc_irq_msi
* Name: up_release_irq_msi
*
* Description:
* Reserve/release vector for MSI
*
****************************************************************************/
int up_alloc_irq_msi(int *num);
void up_release_irq_msi(int *irq, int num);
#undef EXTERN
#ifdef __cplusplus
}
#endif
#endif
#endif /* __ARCH_X86_64_INCLUDE_IRQ_H */