Files
opensbi/include/sbi_utils/irqchip/plic.h
Samuel Holland c6c22f00f4 lib: utils/irqchip: plic: Common PM save/restore
Move the PLIC save/restore functions inside the driver, so they can be
reused on any platform that needs them. The memory needed to store the
PLIC context is also allocated by the driver. The PM data cannot be
completely encapsulated, as some platforms (including Allwinner D1) need
to program the IRQ enable status to a sideband interrupt controller for
wakeup capability.

Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
2024-11-28 11:28:38 +05:30

48 lines
1.1 KiB
C

/*
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2019 Western Digital Corporation or its affiliates.
*
* Authors:
* Anup Patel <anup.patel@wdc.com>
*/
#ifndef __IRQCHIP_PLIC_H__
#define __IRQCHIP_PLIC_H__
#include <sbi/sbi_types.h>
struct plic_data {
unsigned long addr;
unsigned long size;
unsigned long num_src;
unsigned long flags;
void *pm_data;
s16 context_map[][2];
};
/** Work around a bug on Ariane that requires enabling interrupts at boot */
#define PLIC_FLAG_ARIANE_BUG BIT(0)
/** PLIC must be delegated to S-mode like T-HEAD C906 and C910 */
#define PLIC_FLAG_THEAD_DELEGATION BIT(1)
/** Allocate space for power management save/restore operations */
#define PLIC_FLAG_ENABLE_PM BIT(2)
#define PLIC_M_CONTEXT 0
#define PLIC_S_CONTEXT 1
#define PLIC_DATA_SIZE(__hart_count) (sizeof(struct plic_data) + \
(__hart_count) * 2 * sizeof(s16))
#define PLIC_IE_WORDS(__p) ((__p)->num_src / 32 + 1)
void plic_suspend(const struct plic_data *plic);
void plic_resume(const struct plic_data *plic);
int plic_warm_irqchip_init(const struct plic_data *plic);
int plic_cold_irqchip_init(struct plic_data *plic);
#endif