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 #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_USE_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 */