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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (C) 2021 Western Digital Corporation or its affiliates.
* Copyright (C) 2022 Ventana Micro Systems Inc.
*/
#ifndef __LINUX_IRQCHIP_RISCV_IMSIC_H
#define __LINUX_IRQCHIP_RISCV_IMSIC_H
#include <linux/types.h>
#include <linux/bitops.h>
#include <linux/device.h>
#include <linux/fwnode.h>
#include <asm/csr.h>
#define IMSIC_MMIO_PAGE_SHIFT 12
#define IMSIC_MMIO_PAGE_SZ BIT(IMSIC_MMIO_PAGE_SHIFT)
#define IMSIC_MMIO_PAGE_LE 0x00
#define IMSIC_MMIO_PAGE_BE 0x04
#define IMSIC_MIN_ID 63
#define IMSIC_MAX_ID 2048
#define IMSIC_EIDELIVERY 0x70
#define IMSIC_EITHRESHOLD 0x72
#define IMSIC_EIP0 0x80
#define IMSIC_EIP63 0xbf
#define IMSIC_EIPx_BITS 32
#define IMSIC_EIE0 0xc0
#define IMSIC_EIE63 0xff
#define IMSIC_EIEx_BITS 32
#define IMSIC_FIRST IMSIC_EIDELIVERY
#define IMSIC_LAST IMSIC_EIE63
#define IMSIC_MMIO_SETIPNUM_LE 0x00
#define IMSIC_MMIO_SETIPNUM_BE 0x04
struct imsic_local_config {
phys_addr_t msi_pa;
void __iomem *msi_va;
};
struct imsic_global_config {
/*
* MSI Target Address Scheme
*
* XLEN-1 12 0
* | | |
* -------------------------------------------------------------
* |xxxxxx|Group Index|xxxxxxxxxxx|HART Index|Guest Index| 0 |
* -------------------------------------------------------------
*/
/* Bits representing Guest index, HART index, and Group index */
u32 guest_index_bits;
u32 hart_index_bits;
u32 group_index_bits;
u32 group_index_shift;
/* Global base address matching all target MSI addresses */
phys_addr_t base_addr;
/* Number of interrupt identities */
u32 nr_ids;
/* Number of guest interrupt identities */
u32 nr_guest_ids;
/* Per-CPU IMSIC addresses */
struct imsic_local_config __percpu *local;
};
#ifdef CONFIG_RISCV_IMSIC
const struct imsic_global_config *imsic_get_global_config(void);
#else
static inline const struct imsic_global_config *imsic_get_global_config(void)
{
return NULL;
}
#endif
#ifdef CONFIG_ACPI
int imsic_platform_acpi_probe(struct fwnode_handle *fwnode);
struct fwnode_handle *imsic_acpi_get_fwnode(struct device *dev);
#else
static inline struct fwnode_handle *imsic_acpi_get_fwnode(struct device *dev) { return NULL; }
#endif
#endif
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