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 <asm/core.h> 22 #include <asm/kmem_layout.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 #if XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY 51 /* Image Virtual Start Address */ 52 #define KERNELOFFSET (XCHAL_KSEG_CACHED_VADDR + \ 53 CONFIG_KERNEL_LOAD_ADDRESS - \ 54 XCHAL_KSEG_PADDR) 55 #else 56 #define KERNELOFFSET CONFIG_KERNEL_LOAD_ADDRESS 57 #endif 58 59 #else /* !defined(CONFIG_MMU) */ 60 /* MMU Not being used - Virtual == Physical */ 61 62 /* Location of the start of the kernel text, _start */ 63 #define KERNELOFFSET CONFIG_KERNEL_LOAD_ADDRESS 64 65 66 #endif /* CONFIG_MMU */ 67 68 #define RESET_VECTOR1_VADDR (XCHAL_RESET_VECTOR1_VADDR) 69 #ifdef CONFIG_VECTORS_OFFSET 70 #define VECBASE_VADDR (KERNELOFFSET - CONFIG_VECTORS_OFFSET) 71 #else 72 #define VECBASE_VADDR _vecbase 73 #endif 74 75 #if defined(XCHAL_HAVE_VECBASE) && XCHAL_HAVE_VECBASE 76 77 #define VECTOR_VADDR(offset) (VECBASE_VADDR + offset) 78 79 #define USER_VECTOR_VADDR VECTOR_VADDR(XCHAL_USER_VECOFS) 80 #define KERNEL_VECTOR_VADDR VECTOR_VADDR(XCHAL_KERNEL_VECOFS) 81 #define DOUBLEEXC_VECTOR_VADDR VECTOR_VADDR(XCHAL_DOUBLEEXC_VECOFS) 82 #define WINDOW_VECTORS_VADDR VECTOR_VADDR(XCHAL_WINDOW_OF4_VECOFS) 83 #define INTLEVEL2_VECTOR_VADDR VECTOR_VADDR(XCHAL_INTLEVEL2_VECOFS) 84 #define INTLEVEL3_VECTOR_VADDR VECTOR_VADDR(XCHAL_INTLEVEL3_VECOFS) 85 #define INTLEVEL4_VECTOR_VADDR VECTOR_VADDR(XCHAL_INTLEVEL4_VECOFS) 86 #define INTLEVEL5_VECTOR_VADDR VECTOR_VADDR(XCHAL_INTLEVEL5_VECOFS) 87 #define INTLEVEL6_VECTOR_VADDR VECTOR_VADDR(XCHAL_INTLEVEL6_VECOFS) 88 #define INTLEVEL7_VECTOR_VADDR VECTOR_VADDR(XCHAL_INTLEVEL7_VECOFS) 89 #define DEBUG_VECTOR_VADDR VECTOR_VADDR(XCHAL_DEBUG_VECOFS) 90 91 /* 92 * These XCHAL_* #defines from varian/core.h 93 * are not valid to use with V3 MMU. Non-XCHAL 94 * constants are defined above and should be used. 95 */ 96 #undef XCHAL_VECBASE_RESET_VADDR 97 #undef XCHAL_USER_VECTOR_VADDR 98 #undef XCHAL_KERNEL_VECTOR_VADDR 99 #undef XCHAL_DOUBLEEXC_VECTOR_VADDR 100 #undef XCHAL_WINDOW_VECTORS_VADDR 101 #undef XCHAL_INTLEVEL2_VECTOR_VADDR 102 #undef XCHAL_INTLEVEL3_VECTOR_VADDR 103 #undef XCHAL_INTLEVEL4_VECTOR_VADDR 104 #undef XCHAL_INTLEVEL5_VECTOR_VADDR 105 #undef XCHAL_INTLEVEL6_VECTOR_VADDR 106 #undef XCHAL_INTLEVEL7_VECTOR_VADDR 107 #undef XCHAL_DEBUG_VECTOR_VADDR 108 109 #else 110 111 #define USER_VECTOR_VADDR XCHAL_USER_VECTOR_VADDR 112 #define KERNEL_VECTOR_VADDR XCHAL_KERNEL_VECTOR_VADDR 113 #define DOUBLEEXC_VECTOR_VADDR XCHAL_DOUBLEEXC_VECTOR_VADDR 114 #define WINDOW_VECTORS_VADDR XCHAL_WINDOW_VECTORS_VADDR 115 #define INTLEVEL2_VECTOR_VADDR XCHAL_INTLEVEL2_VECTOR_VADDR 116 #define INTLEVEL3_VECTOR_VADDR XCHAL_INTLEVEL3_VECTOR_VADDR 117 #define INTLEVEL4_VECTOR_VADDR XCHAL_INTLEVEL4_VECTOR_VADDR 118 #define INTLEVEL5_VECTOR_VADDR XCHAL_INTLEVEL5_VECTOR_VADDR 119 #define INTLEVEL6_VECTOR_VADDR XCHAL_INTLEVEL6_VECTOR_VADDR 120 #define INTLEVEL7_VECTOR_VADDR XCHAL_INTLEVEL6_VECTOR_VADDR 121 #define DEBUG_VECTOR_VADDR XCHAL_DEBUG_VECTOR_VADDR 122 123 #endif 124 125 #endif /* _XTENSA_VECTORS_H */ 126