| 1 | /* |
| 2 | * arch/xtensa/include/asm/xchal_vaddr_remap.h |
| 3 | * |
| 4 | * Xtensa macros for MMU V3 Support. Deals with re-mapping the Virtual |
| 5 | * Memory Addresses from "Virtual == Physical" to their prevvious V2 MMU |
| 6 | * mappings (KSEG at 0xD0000000 and KIO at 0XF0000000). |
| 7 | * |
| 8 | * This file is subject to the terms and conditions of the GNU General Public |
| 9 | * License. See the file "COPYING" in the main directory of this archive |
| 10 | * for more details. |
| 11 | * |
| 12 | * Copyright (C) 2008 - 2012 Tensilica Inc. |
| 13 | * |
| 14 | * Pete Delaney <piet@tensilica.com> |
| 15 | * Marc Gauthier <marc@tensilica.com |
| 16 | */ |
| 17 | |
| 18 | #ifndef _XTENSA_VECTORS_H |
| 19 | #define _XTENSA_VECTORS_H |
| 20 | |
| 21 | #include <variant/core.h> |
| 22 | #include <platform/hardware.h> |
| 23 | |
| 24 | #if XCHAL_HAVE_PTP_MMU |
| 25 | #define XCHAL_KIO_CACHED_VADDR 0xe0000000 |
| 26 | #define XCHAL_KIO_BYPASS_VADDR 0xf0000000 |
| 27 | #define XCHAL_KIO_DEFAULT_PADDR 0xf0000000 |
| 28 | #else |
| 29 | #define XCHAL_KIO_BYPASS_VADDR XCHAL_KIO_PADDR |
| 30 | #define XCHAL_KIO_DEFAULT_PADDR 0x90000000 |
| 31 | #endif |
| 32 | #define XCHAL_KIO_SIZE 0x10000000 |
| 33 | |
| 34 | #if (!XCHAL_HAVE_PTP_MMU || XCHAL_HAVE_SPANNING_WAY) && defined(CONFIG_OF) |
| 35 | #define XCHAL_KIO_PADDR xtensa_get_kio_paddr() |
| 36 | #ifndef __ASSEMBLY__ |
| 37 | extern unsigned long xtensa_kio_paddr; |
| 38 | |
| 39 | static inline unsigned long xtensa_get_kio_paddr(void) |
| 40 | { |
| 41 | return xtensa_kio_paddr; |
| 42 | } |
| 43 | #endif |
| 44 | #else |
| 45 | #define XCHAL_KIO_PADDR XCHAL_KIO_DEFAULT_PADDR |
| 46 | #endif |
| 47 | |
| 48 | #if defined(CONFIG_MMU) |
| 49 | |
| 50 | /* Will Become VECBASE */ |
| 51 | #define VIRTUAL_MEMORY_ADDRESS 0xD0000000 |
| 52 | |
| 53 | /* Image Virtual Start Address */ |
| 54 | #define KERNELOFFSET 0xD0003000 |
| 55 | |
| 56 | #if defined(XCHAL_HAVE_PTP_MMU) && XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY |
| 57 | /* MMU v3 - XCHAL_HAVE_PTP_MMU == 1 */ |
| 58 | #define LOAD_MEMORY_ADDRESS 0x00003000 |
| 59 | #else |
| 60 | /* MMU V2 - XCHAL_HAVE_PTP_MMU == 0 */ |
| 61 | #define LOAD_MEMORY_ADDRESS 0xD0003000 |
| 62 | #endif |
| 63 | |
| 64 | #define RESET_VECTOR1_VADDR (VIRTUAL_MEMORY_ADDRESS + \ |
| 65 | XCHAL_RESET_VECTOR1_PADDR) |
| 66 | |
| 67 | #else /* !defined(CONFIG_MMU) */ |
| 68 | /* MMU Not being used - Virtual == Physical */ |
| 69 | |
| 70 | /* VECBASE */ |
| 71 | #define VIRTUAL_MEMORY_ADDRESS (PLATFORM_DEFAULT_MEM_START + 0x2000) |
| 72 | |
| 73 | /* Location of the start of the kernel text, _start */ |
| 74 | #define KERNELOFFSET (PLATFORM_DEFAULT_MEM_START + 0x3000) |
| 75 | |
| 76 | /* Loaded just above possibly live vectors */ |
| 77 | #define LOAD_MEMORY_ADDRESS (PLATFORM_DEFAULT_MEM_START + 0x3000) |
| 78 | |
| 79 | #define RESET_VECTOR1_VADDR (XCHAL_RESET_VECTOR1_VADDR) |
| 80 | |
| 81 | #endif /* CONFIG_MMU */ |
| 82 | |
| 83 | #define XC_VADDR(offset) (VIRTUAL_MEMORY_ADDRESS + offset) |
| 84 | |
| 85 | /* Used to set VECBASE register */ |
| 86 | #define VECBASE_RESET_VADDR VIRTUAL_MEMORY_ADDRESS |
| 87 | |
| 88 | #if defined(XCHAL_HAVE_VECBASE) && XCHAL_HAVE_VECBASE |
| 89 | |
| 90 | #define USER_VECTOR_VADDR XC_VADDR(XCHAL_USER_VECOFS) |
| 91 | #define KERNEL_VECTOR_VADDR XC_VADDR(XCHAL_KERNEL_VECOFS) |
| 92 | #define DOUBLEEXC_VECTOR_VADDR XC_VADDR(XCHAL_DOUBLEEXC_VECOFS) |
| 93 | #define WINDOW_VECTORS_VADDR XC_VADDR(XCHAL_WINDOW_OF4_VECOFS) |
| 94 | #define INTLEVEL2_VECTOR_VADDR XC_VADDR(XCHAL_INTLEVEL2_VECOFS) |
| 95 | #define INTLEVEL3_VECTOR_VADDR XC_VADDR(XCHAL_INTLEVEL3_VECOFS) |
| 96 | #define INTLEVEL4_VECTOR_VADDR XC_VADDR(XCHAL_INTLEVEL4_VECOFS) |
| 97 | #define INTLEVEL5_VECTOR_VADDR XC_VADDR(XCHAL_INTLEVEL5_VECOFS) |
| 98 | #define INTLEVEL6_VECTOR_VADDR XC_VADDR(XCHAL_INTLEVEL6_VECOFS) |
| 99 | |
| 100 | #define DEBUG_VECTOR_VADDR XC_VADDR(XCHAL_DEBUG_VECOFS) |
| 101 | |
| 102 | #define NMI_VECTOR_VADDR XC_VADDR(XCHAL_NMI_VECOFS) |
| 103 | |
| 104 | #define INTLEVEL7_VECTOR_VADDR XC_VADDR(XCHAL_INTLEVEL7_VECOFS) |
| 105 | |
| 106 | /* |
| 107 | * These XCHAL_* #defines from varian/core.h |
| 108 | * are not valid to use with V3 MMU. Non-XCHAL |
| 109 | * constants are defined above and should be used. |
| 110 | */ |
| 111 | #undef XCHAL_VECBASE_RESET_VADDR |
| 112 | #undef XCHAL_RESET_VECTOR0_VADDR |
| 113 | #undef XCHAL_USER_VECTOR_VADDR |
| 114 | #undef XCHAL_KERNEL_VECTOR_VADDR |
| 115 | #undef XCHAL_DOUBLEEXC_VECTOR_VADDR |
| 116 | #undef XCHAL_WINDOW_VECTORS_VADDR |
| 117 | #undef XCHAL_INTLEVEL2_VECTOR_VADDR |
| 118 | #undef XCHAL_INTLEVEL3_VECTOR_VADDR |
| 119 | #undef XCHAL_INTLEVEL4_VECTOR_VADDR |
| 120 | #undef XCHAL_INTLEVEL5_VECTOR_VADDR |
| 121 | #undef XCHAL_INTLEVEL6_VECTOR_VADDR |
| 122 | #undef XCHAL_DEBUG_VECTOR_VADDR |
| 123 | #undef XCHAL_NMI_VECTOR_VADDR |
| 124 | #undef XCHAL_INTLEVEL7_VECTOR_VADDR |
| 125 | |
| 126 | #else |
| 127 | |
| 128 | #define USER_VECTOR_VADDR XCHAL_USER_VECTOR_VADDR |
| 129 | #define KERNEL_VECTOR_VADDR XCHAL_KERNEL_VECTOR_VADDR |
| 130 | #define DOUBLEEXC_VECTOR_VADDR XCHAL_DOUBLEEXC_VECTOR_VADDR |
| 131 | #define WINDOW_VECTORS_VADDR XCHAL_WINDOW_VECTORS_VADDR |
| 132 | #define INTLEVEL2_VECTOR_VADDR XCHAL_INTLEVEL2_VECTOR_VADDR |
| 133 | #define INTLEVEL3_VECTOR_VADDR XCHAL_INTLEVEL3_VECTOR_VADDR |
| 134 | #define INTLEVEL4_VECTOR_VADDR XCHAL_INTLEVEL4_VECTOR_VADDR |
| 135 | #define INTLEVEL5_VECTOR_VADDR XCHAL_INTLEVEL5_VECTOR_VADDR |
| 136 | #define INTLEVEL6_VECTOR_VADDR XCHAL_INTLEVEL6_VECTOR_VADDR |
| 137 | #define DEBUG_VECTOR_VADDR XCHAL_DEBUG_VECTOR_VADDR |
| 138 | |
| 139 | #endif |
| 140 | |
| 141 | #endif /* _XTENSA_VECTORS_H */ |