Files
opensbi/include/sbi/sbi_irqchip.h
Samuel Holland 2dd6eaf680 lib: sbi_irqchip: Call driver warm_init from SBI core
Currently, each platform keeps track of which irqchip driver is in use
and calls its warm init function. Since the generic platform may use
multiple irqchip drivers, it has logic to track an array of drivers.

The code is simplified and made common across platforms by treating warm
init and exit as properties of the driver, not the platform. Then the
platform's only role is to select and prepare a driver during cold boot.

For now, only add a .warm_init hook, since none of the existing drivers
need an .exit hook. It could be added in the future if needed.

Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
2024-11-28 11:40:17 +05:30

57 lines
1.3 KiB
C

/*
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2022 Ventana Micro Systems Inc.
*
* Authors:
* Anup Patel <apatel@ventanamicro.com>
*/
#ifndef __SBI_IRQCHIP_H__
#define __SBI_IRQCHIP_H__
#include <sbi/sbi_list.h>
#include <sbi/sbi_types.h>
struct sbi_scratch;
/** irqchip hardware device */
struct sbi_irqchip_device {
/** Node in the list of irqchip devices */
struct sbi_dlist node;
/** Initialize per-hart state for the current hart */
int (*warm_init)(struct sbi_irqchip_device *dev);
};
/**
* Set external interrupt handling function
*
* This function is called by OpenSBI platform code to set a handler for
* external interrupts
*
* @param fn function pointer for handling external irqs
*/
void sbi_irqchip_set_irqfn(int (*fn)(void));
/**
* Process external interrupts
*
* This function is called by sbi_trap_handler() to handle external
* interrupts.
*
* @param regs pointer for trap registers
*/
int sbi_irqchip_process(void);
/** Register an irqchip device to receive callbacks */
void sbi_irqchip_add_device(struct sbi_irqchip_device *dev);
/** Initialize interrupt controllers */
int sbi_irqchip_init(struct sbi_scratch *scratch, bool cold_boot);
/** Exit interrupt controllers */
void sbi_irqchip_exit(struct sbi_scratch *scratch);
#endif