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 #if defined(CONFIG_MMU)
  24
  25 /* Will Become VECBASE */
  26 #define VIRTUAL_MEMORY_ADDRESS          0xD0000000
  27
  28 /* Image Virtual Start Address */
  29 #define KERNELOFFSET                    0xD0003000
  30
  31 #if defined(XCHAL_HAVE_PTP_MMU) && XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY
  32   /* MMU v3  - XCHAL_HAVE_PTP_MMU  == 1 */
  33   #define PHYSICAL_MEMORY_ADDRESS       0x00000000
  34   #define LOAD_MEMORY_ADDRESS           0x00003000
  35 #else
  36   /* MMU V2 -  XCHAL_HAVE_PTP_MMU  == 0 */
  37   #define PHYSICAL_MEMORY_ADDRESS       0xD0000000
  38   #define LOAD_MEMORY_ADDRESS           0xD0003000
  39 #endif
  40
  41 #else /* !defined(CONFIG_MMU) */
  42   /* MMU Not being used - Virtual == Physical */
  43
  44   /* VECBASE */
  45   #define VIRTUAL_MEMORY_ADDRESS        0x00002000
  46
  47   /* Location of the start of the kernel text, _start */
  48   #define KERNELOFFSET                  0x00003000
  49   #define PHYSICAL_MEMORY_ADDRESS       0x00000000
  50
  51   /* Loaded just above possibly live vectors */
  52   #define LOAD_MEMORY_ADDRESS           0x00003000
  53
  54 #endif /* CONFIG_MMU */
  55
  56 #define XC_VADDR(offset)                (VIRTUAL_MEMORY_ADDRESS  + offset)
  57 #define XC_PADDR(offset)                (PHYSICAL_MEMORY_ADDRESS + offset)
  58
  59 /* Used to set VECBASE register */
  60 #define VECBASE_RESET_VADDR             VIRTUAL_MEMORY_ADDRESS
  61
  62 #define RESET_VECTOR_VECOFS             (XCHAL_RESET_VECTOR_VADDR - \
  63                                                 VECBASE_RESET_VADDR)
  64 #define RESET_VECTOR_VADDR              XC_VADDR(RESET_VECTOR_VECOFS)
  65
  66 #define RESET_VECTOR1_VECOFS            (XCHAL_RESET_VECTOR1_VADDR - \
  67                                                 VECBASE_RESET_VADDR)
  68 #define RESET_VECTOR1_VADDR             XC_VADDR(RESET_VECTOR1_VECOFS)
  69
  70 #if XCHAL_HAVE_VECBASE
  71
  72 #define USER_VECTOR_VADDR               XC_VADDR(XCHAL_USER_VECOFS)
  73 #define KERNEL_VECTOR_VADDR             XC_VADDR(XCHAL_KERNEL_VECOFS)
  74 #define DOUBLEEXC_VECTOR_VADDR          XC_VADDR(XCHAL_DOUBLEEXC_VECOFS)
  75 #define WINDOW_VECTORS_VADDR            XC_VADDR(XCHAL_WINDOW_OF4_VECOFS)
  76 #define INTLEVEL2_VECTOR_VADDR          XC_VADDR(XCHAL_INTLEVEL2_VECOFS)
  77 #define INTLEVEL3_VECTOR_VADDR          XC_VADDR(XCHAL_INTLEVEL3_VECOFS)
  78 #define INTLEVEL4_VECTOR_VADDR          XC_VADDR(XCHAL_INTLEVEL4_VECOFS)
  79 #define INTLEVEL5_VECTOR_VADDR          XC_VADDR(XCHAL_INTLEVEL5_VECOFS)
  80 #define INTLEVEL6_VECTOR_VADDR          XC_VADDR(XCHAL_INTLEVEL6_VECOFS)
  81
  82 #define DEBUG_VECTOR_VADDR              XC_VADDR(XCHAL_DEBUG_VECOFS)
  83
  84 #undef  XCHAL_NMI_VECTOR_VADDR
  85 #define XCHAL_NMI_VECTOR_VADDR          XC_VADDR(XCHAL_NMI_VECOFS)
  86
  87 #undef  XCHAL_INTLEVEL7_VECTOR_VADDR
  88 #define XCHAL_INTLEVEL7_VECTOR_VADDR    XC_VADDR(XCHAL_INTLEVEL7_VECOFS)
  89
  90 /*
  91  * These XCHAL_* #defines from varian/core.h
  92  * are not valid to use with V3 MMU. Non-XCHAL
  93  * constants are defined above and should be used.
  94  */
  95 #undef  XCHAL_VECBASE_RESET_VADDR
  96 #undef  XCHAL_RESET_VECTOR0_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_DEBUG_VECTOR_VADDR
 107 #undef  XCHAL_NMI_VECTOR_VADDR
 108 #undef  XCHAL_INTLEVEL7_VECTOR_VADDR
 109
 110 #else
 111
 112 #define USER_VECTOR_VADDR               XCHAL_USER_VECTOR_VADDR
 113 #define KERNEL_VECTOR_VADDR             XCHAL_KERNEL_VECTOR_VADDR
 114 #define DOUBLEEXC_VECTOR_VADDR          XCHAL_DOUBLEEXC_VECTOR_VADDR
 115 #define WINDOW_VECTORS_VADDR            XCHAL_WINDOW_VECTORS_VADDR
 116 #define INTLEVEL2_VECTOR_VADDR          XCHAL_INTLEVEL2_VECTOR_VADDR
 117 #define INTLEVEL3_VECTOR_VADDR          XCHAL_INTLEVEL3_VECTOR_VADDR
 118 #define INTLEVEL4_VECTOR_VADDR          XCHAL_INTLEVEL4_VECTOR_VADDR
 119 #define INTLEVEL5_VECTOR_VADDR          XCHAL_INTLEVEL5_VECTOR_VADDR
 120 #define INTLEVEL6_VECTOR_VADDR          XCHAL_INTLEVEL6_VECTOR_VADDR
 121 #define DEBUG_VECTOR_VADDR              XCHAL_DEBUG_VECTOR_VADDR
 122
 123 #endif
 124
 125 #endif /* _XTENSA_VECTORS_H */