1/* SPDX-License-Identifier: GPL-2.0-only */ 2/* 3 * Copyright (C) 2021 Western Digital Corporation or its affiliates. 4 * Copyright (C) 2022 Ventana Micro Systems Inc. 5 */ 6#ifndef __LINUX_IRQCHIP_RISCV_IMSIC_H 7#define __LINUX_IRQCHIP_RISCV_IMSIC_H 8 9#include <linux/types.h> 10#include <linux/bitops.h> 11#include <asm/csr.h> 12 13#define IMSIC_MMIO_PAGE_SHIFT 12 14#define IMSIC_MMIO_PAGE_SZ BIT(IMSIC_MMIO_PAGE_SHIFT) 15#define IMSIC_MMIO_PAGE_LE 0x00 16#define IMSIC_MMIO_PAGE_BE 0x04 17 18#define IMSIC_MIN_ID 63 19#define IMSIC_MAX_ID 2048 20 21#define IMSIC_EIDELIVERY 0x70 22 23#define IMSIC_EITHRESHOLD 0x72 24 25#define IMSIC_EIP0 0x80 26#define IMSIC_EIP63 0xbf 27#define IMSIC_EIPx_BITS 32 28 29#define IMSIC_EIE0 0xc0 30#define IMSIC_EIE63 0xff 31#define IMSIC_EIEx_BITS 32 32 33#define IMSIC_FIRST IMSIC_EIDELIVERY 34#define IMSIC_LAST IMSIC_EIE63 35 36#define IMSIC_MMIO_SETIPNUM_LE 0x00 37#define IMSIC_MMIO_SETIPNUM_BE 0x04 38 39struct imsic_local_config { 40 phys_addr_t msi_pa; 41 void __iomem *msi_va; 42}; 43 44struct imsic_global_config { 45 /* 46 * MSI Target Address Scheme 47 * 48 * XLEN-1 12 0 49 * | | | 50 * ------------------------------------------------------------- 51 * |xxxxxx|Group Index|xxxxxxxxxxx|HART Index|Guest Index| 0 | 52 * ------------------------------------------------------------- 53 */ 54 55 /* Bits representing Guest index, HART index, and Group index */ 56 u32 guest_index_bits; 57 u32 hart_index_bits; 58 u32 group_index_bits; 59 u32 group_index_shift; 60 61 /* Global base address matching all target MSI addresses */ 62 phys_addr_t base_addr; 63 64 /* Number of interrupt identities */ 65 u32 nr_ids; 66 67 /* Number of guest interrupt identities */ 68 u32 nr_guest_ids; 69 70 /* Per-CPU IMSIC addresses */ 71 struct imsic_local_config __percpu *local; 72}; 73 74#ifdef CONFIG_RISCV_IMSIC 75 76const struct imsic_global_config *imsic_get_global_config(void); 77 78#else 79 80static inline const struct imsic_global_config *imsic_get_global_config(void) 81{ 82 return NULL; 83} 84 85#endif 86 87#endif 88