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 <linux/device.h> 12 #include <linux/fwnode.h> 13 #include <asm/csr.h> 14 15 #define IMSIC_MMIO_PAGE_SHIFT 12 16 #define IMSIC_MMIO_PAGE_SZ BIT(IMSIC_MMIO_PAGE_SHIFT) 17 #define IMSIC_MMIO_PAGE_LE 0x00 18 #define IMSIC_MMIO_PAGE_BE 0x04 19 20 #define IMSIC_MIN_ID 63 21 #define IMSIC_MAX_ID 2048 22 23 #define IMSIC_EIDELIVERY 0x70 24 25 #define IMSIC_EITHRESHOLD 0x72 26 27 #define IMSIC_EIP0 0x80 28 #define IMSIC_EIP63 0xbf 29 #define IMSIC_EIPx_BITS 32 30 31 #define IMSIC_EIE0 0xc0 32 #define IMSIC_EIE63 0xff 33 #define IMSIC_EIEx_BITS 32 34 35 #define IMSIC_FIRST IMSIC_EIDELIVERY 36 #define IMSIC_LAST IMSIC_EIE63 37 38 #define IMSIC_MMIO_SETIPNUM_LE 0x00 39 #define IMSIC_MMIO_SETIPNUM_BE 0x04 40 41 struct imsic_local_config { 42 phys_addr_t msi_pa; 43 void __iomem *msi_va; 44 }; 45 46 struct imsic_global_config { 47 /* 48 * MSI Target Address Scheme 49 * 50 * XLEN-1 12 0 51 * | | | 52 * ------------------------------------------------------------- 53 * |xxxxxx|Group Index|xxxxxxxxxxx|HART Index|Guest Index| 0 | 54 * ------------------------------------------------------------- 55 */ 56 57 /* Bits representing Guest index, HART index, and Group index */ 58 u32 guest_index_bits; 59 u32 hart_index_bits; 60 u32 group_index_bits; 61 u32 group_index_shift; 62 63 /* Global base address matching all target MSI addresses */ 64 phys_addr_t base_addr; 65 66 /* Number of interrupt identities */ 67 u32 nr_ids; 68 69 /* Number of guest interrupt identities */ 70 u32 nr_guest_ids; 71 72 /* Per-CPU IMSIC addresses */ 73 struct imsic_local_config __percpu *local; 74 }; 75 76 #ifdef CONFIG_RISCV_IMSIC 77 78 const struct imsic_global_config *imsic_get_global_config(void); 79 80 #else 81 imsic_get_global_config(void)82static inline const struct imsic_global_config *imsic_get_global_config(void) 83 { 84 return NULL; 85 } 86 87 #endif 88 89 #ifdef CONFIG_ACPI 90 int imsic_platform_acpi_probe(struct fwnode_handle *fwnode); 91 struct fwnode_handle *imsic_acpi_get_fwnode(struct device *dev); 92 #else imsic_acpi_get_fwnode(struct device * dev)93static inline struct fwnode_handle *imsic_acpi_get_fwnode(struct device *dev) { return NULL; } 94 #endif 95 96 #endif 97