arch/xtensa/include/asm/vectors.h

   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
  23 #define XCHAL_KIO_CACHED_VADDR          0xe0000000
  24 #define XCHAL_KIO_BYPASS_VADDR          0xf0000000
  25 #define XCHAL_KIO_DEFAULT_PADDR         0xf0000000
  26 #define XCHAL_KIO_SIZE                  0x10000000
  27
  28 #if XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY && defined(CONFIG_OF)
  29 #define XCHAL_KIO_PADDR                 xtensa_get_kio_paddr()
  30 #else
  31 #define XCHAL_KIO_PADDR                 XCHAL_KIO_DEFAULT_PADDR
  32 #endif
  33
  34 #if defined(CONFIG_MMU)
  35
  36 /* Will Become VECBASE */
  37 #define VIRTUAL_MEMORY_ADDRESS          0xD0000000
  38
  39 /* Image Virtual Start Address */
  40 #define KERNELOFFSET                    0xD0003000
  41
  42 #if defined(XCHAL_HAVE_PTP_MMU) && XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY
  43   /* MMU v3  - XCHAL_HAVE_PTP_MMU  == 1 */
  44   #define LOAD_MEMORY_ADDRESS           0x00003000
  45 #else
  46   /* MMU V2 -  XCHAL_HAVE_PTP_MMU  == 0 */
  47   #define LOAD_MEMORY_ADDRESS           0xD0003000
  48 #endif
  49
  50 #else /* !defined(CONFIG_MMU) */
  51   /* MMU Not being used - Virtual == Physical */
  52
  53   /* VECBASE */
  54   #define VIRTUAL_MEMORY_ADDRESS        0x00002000
  55
  56   /* Location of the start of the kernel text, _start */
  57   #define KERNELOFFSET                  0x00003000
  58
  59   /* Loaded just above possibly live vectors */
  60   #define LOAD_MEMORY_ADDRESS           0x00003000
  61
  62 #endif /* CONFIG_MMU */
  63
  64 #define XC_VADDR(offset)                (VIRTUAL_MEMORY_ADDRESS  + offset)
  65
  66 /* Used to set VECBASE register */
  67 #define VECBASE_RESET_VADDR             VIRTUAL_MEMORY_ADDRESS
  68
  69 #define RESET_VECTOR_VECOFS             (XCHAL_RESET_VECTOR_VADDR - \
  70                                                 VECBASE_RESET_VADDR)
  71 #define RESET_VECTOR_VADDR              XC_VADDR(RESET_VECTOR_VECOFS)
  72
  73 #define RESET_VECTOR1_VECOFS            (XCHAL_RESET_VECTOR1_VADDR - \
  74                                                 VECBASE_RESET_VADDR)
  75 #define RESET_VECTOR1_VADDR             XC_VADDR(RESET_VECTOR1_VECOFS)
  76
  77 #if defined(XCHAL_HAVE_VECBASE) && XCHAL_HAVE_VECBASE
  78
  79 #define USER_VECTOR_VADDR               XC_VADDR(XCHAL_USER_VECOFS)
  80 #define KERNEL_VECTOR_VADDR             XC_VADDR(XCHAL_KERNEL_VECOFS)
  81 #define DOUBLEEXC_VECTOR_VADDR          XC_VADDR(XCHAL_DOUBLEEXC_VECOFS)
  82 #define WINDOW_VECTORS_VADDR            XC_VADDR(XCHAL_WINDOW_OF4_VECOFS)
  83 #define INTLEVEL2_VECTOR_VADDR          XC_VADDR(XCHAL_INTLEVEL2_VECOFS)
  84 #define INTLEVEL3_VECTOR_VADDR          XC_VADDR(XCHAL_INTLEVEL3_VECOFS)
  85 #define INTLEVEL4_VECTOR_VADDR          XC_VADDR(XCHAL_INTLEVEL4_VECOFS)
  86 #define INTLEVEL5_VECTOR_VADDR          XC_VADDR(XCHAL_INTLEVEL5_VECOFS)
  87 #define INTLEVEL6_VECTOR_VADDR          XC_VADDR(XCHAL_INTLEVEL6_VECOFS)
  88
  89 #define DEBUG_VECTOR_VADDR              XC_VADDR(XCHAL_DEBUG_VECOFS)
  90
  91 #define NMI_VECTOR_VADDR                XC_VADDR(XCHAL_NMI_VECOFS)
  92
  93 #define INTLEVEL7_VECTOR_VADDR          XC_VADDR(XCHAL_INTLEVEL7_VECOFS)
  94
  95 /*
  96  * These XCHAL_* #defines from varian/core.h
  97  * are not valid to use with V3 MMU. Non-XCHAL
  98  * constants are defined above and should be used.
  99  */
 100 #undef  XCHAL_VECBASE_RESET_VADDR
 101 #undef  XCHAL_RESET_VECTOR0_VADDR
 102 #undef  XCHAL_USER_VECTOR_VADDR
 103 #undef  XCHAL_KERNEL_VECTOR_VADDR
 104 #undef  XCHAL_DOUBLEEXC_VECTOR_VADDR
 105 #undef  XCHAL_WINDOW_VECTORS_VADDR
 106 #undef  XCHAL_INTLEVEL2_VECTOR_VADDR
 107 #undef  XCHAL_INTLEVEL3_VECTOR_VADDR
 108 #undef  XCHAL_INTLEVEL4_VECTOR_VADDR
 109 #undef  XCHAL_INTLEVEL5_VECTOR_VADDR
 110 #undef  XCHAL_INTLEVEL6_VECTOR_VADDR
 111 #undef  XCHAL_DEBUG_VECTOR_VADDR
 112 #undef  XCHAL_NMI_VECTOR_VADDR
 113 #undef  XCHAL_INTLEVEL7_VECTOR_VADDR
 114
 115 #else
 116
 117 #define USER_VECTOR_VADDR               XCHAL_USER_VECTOR_VADDR
 118 #define KERNEL_VECTOR_VADDR             XCHAL_KERNEL_VECTOR_VADDR
 119 #define DOUBLEEXC_VECTOR_VADDR          XCHAL_DOUBLEEXC_VECTOR_VADDR
 120 #define WINDOW_VECTORS_VADDR            XCHAL_WINDOW_VECTORS_VADDR
 121 #define INTLEVEL2_VECTOR_VADDR          XCHAL_INTLEVEL2_VECTOR_VADDR
 122 #define INTLEVEL3_VECTOR_VADDR          XCHAL_INTLEVEL3_VECTOR_VADDR
 123 #define INTLEVEL4_VECTOR_VADDR          XCHAL_INTLEVEL4_VECTOR_VADDR
 124 #define INTLEVEL5_VECTOR_VADDR          XCHAL_INTLEVEL5_VECTOR_VADDR
 125 #define INTLEVEL6_VECTOR_VADDR          XCHAL_INTLEVEL6_VECTOR_VADDR
 126 #define DEBUG_VECTOR_VADDR              XCHAL_DEBUG_VECTOR_VADDR
 127
 128 #endif
 129
 130 #endif /* _XTENSA_VECTORS_H */