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 <platform/hardware.h>
  23 #include <asm/kmem_layout.h>
  24
  25 #if XCHAL_HAVE_PTP_MMU
  26 #define XCHAL_KIO_CACHED_VADDR          0xe0000000
  27 #define XCHAL_KIO_BYPASS_VADDR          0xf0000000
  28 #define XCHAL_KIO_DEFAULT_PADDR         0xf0000000
  29 #else
  30 #define XCHAL_KIO_BYPASS_VADDR          XCHAL_KIO_PADDR
  31 #define XCHAL_KIO_DEFAULT_PADDR         0x90000000
  32 #endif
  33 #define XCHAL_KIO_SIZE                  0x10000000
  34
  35 #if (!XCHAL_HAVE_PTP_MMU || XCHAL_HAVE_SPANNING_WAY) && defined(CONFIG_OF)
  36 #define XCHAL_KIO_PADDR                 xtensa_get_kio_paddr()
  37 #ifndef __ASSEMBLY__
  38 extern unsigned long xtensa_kio_paddr;
  39
  40 static inline unsigned long xtensa_get_kio_paddr(void)
  41 {
  42         return xtensa_kio_paddr;
  43 }
  44 #endif
  45 #else
  46 #define XCHAL_KIO_PADDR                 XCHAL_KIO_DEFAULT_PADDR
  47 #endif
  48
  49 #if defined(CONFIG_MMU)
  50
  51 #if XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY
  52 /* Image Virtual Start Address */
  53 #define KERNELOFFSET                    (XCHAL_KSEG_CACHED_VADDR + \
  54                                          CONFIG_KERNEL_LOAD_ADDRESS - \
  55                                          XCHAL_KSEG_PADDR)
  56 #else
  57 #define KERNELOFFSET                    CONFIG_KERNEL_LOAD_ADDRESS
  58 #endif
  59
  60 #else /* !defined(CONFIG_MMU) */
  61   /* MMU Not being used - Virtual == Physical */
  62
  63 /* Location of the start of the kernel text, _start */
  64 #define KERNELOFFSET                    CONFIG_KERNEL_LOAD_ADDRESS
  65
  66
  67 #endif /* CONFIG_MMU */
  68
  69 #define RESET_VECTOR1_VADDR             (XCHAL_RESET_VECTOR1_VADDR)
  70 #define VECBASE_VADDR                   (KERNELOFFSET - CONFIG_VECTORS_OFFSET)
  71
  72 #if defined(XCHAL_HAVE_VECBASE) && XCHAL_HAVE_VECBASE
  73
  74 #define VECTOR_VADDR(offset)            (VECBASE_VADDR + offset)
  75
  76 #define USER_VECTOR_VADDR               VECTOR_VADDR(XCHAL_USER_VECOFS)
  77 #define KERNEL_VECTOR_VADDR             VECTOR_VADDR(XCHAL_KERNEL_VECOFS)
  78 #define DOUBLEEXC_VECTOR_VADDR          VECTOR_VADDR(XCHAL_DOUBLEEXC_VECOFS)
  79 #define WINDOW_VECTORS_VADDR            VECTOR_VADDR(XCHAL_WINDOW_OF4_VECOFS)
  80 #define INTLEVEL2_VECTOR_VADDR          VECTOR_VADDR(XCHAL_INTLEVEL2_VECOFS)
  81 #define INTLEVEL3_VECTOR_VADDR          VECTOR_VADDR(XCHAL_INTLEVEL3_VECOFS)
  82 #define INTLEVEL4_VECTOR_VADDR          VECTOR_VADDR(XCHAL_INTLEVEL4_VECOFS)
  83 #define INTLEVEL5_VECTOR_VADDR          VECTOR_VADDR(XCHAL_INTLEVEL5_VECOFS)
  84 #define INTLEVEL6_VECTOR_VADDR          VECTOR_VADDR(XCHAL_INTLEVEL6_VECOFS)
  85 #define INTLEVEL7_VECTOR_VADDR          VECTOR_VADDR(XCHAL_INTLEVEL7_VECOFS)
  86 #define DEBUG_VECTOR_VADDR              VECTOR_VADDR(XCHAL_DEBUG_VECOFS)
  87
  88 /*
  89  * These XCHAL_* #defines from varian/core.h
  90  * are not valid to use with V3 MMU. Non-XCHAL
  91  * constants are defined above and should be used.
  92  */
  93 #undef  XCHAL_VECBASE_RESET_VADDR
  94 #undef  XCHAL_USER_VECTOR_VADDR
  95 #undef  XCHAL_KERNEL_VECTOR_VADDR
  96 #undef  XCHAL_DOUBLEEXC_VECTOR_VADDR
  97 #undef  XCHAL_WINDOW_VECTORS_VADDR
  98 #undef  XCHAL_INTLEVEL2_VECTOR_VADDR
  99 #undef  XCHAL_INTLEVEL3_VECTOR_VADDR
 100 #undef  XCHAL_INTLEVEL4_VECTOR_VADDR
 101 #undef  XCHAL_INTLEVEL5_VECTOR_VADDR
 102 #undef  XCHAL_INTLEVEL6_VECTOR_VADDR
 103 #undef  XCHAL_INTLEVEL7_VECTOR_VADDR
 104 #undef  XCHAL_DEBUG_VECTOR_VADDR
 105
 106 #else
 107
 108 #define USER_VECTOR_VADDR               XCHAL_USER_VECTOR_VADDR
 109 #define KERNEL_VECTOR_VADDR             XCHAL_KERNEL_VECTOR_VADDR
 110 #define DOUBLEEXC_VECTOR_VADDR          XCHAL_DOUBLEEXC_VECTOR_VADDR
 111 #define WINDOW_VECTORS_VADDR            XCHAL_WINDOW_VECTORS_VADDR
 112 #define INTLEVEL2_VECTOR_VADDR          XCHAL_INTLEVEL2_VECTOR_VADDR
 113 #define INTLEVEL3_VECTOR_VADDR          XCHAL_INTLEVEL3_VECTOR_VADDR
 114 #define INTLEVEL4_VECTOR_VADDR          XCHAL_INTLEVEL4_VECTOR_VADDR
 115 #define INTLEVEL5_VECTOR_VADDR          XCHAL_INTLEVEL5_VECTOR_VADDR
 116 #define INTLEVEL6_VECTOR_VADDR          XCHAL_INTLEVEL6_VECTOR_VADDR
 117 #define INTLEVEL7_VECTOR_VADDR          XCHAL_INTLEVEL6_VECTOR_VADDR
 118 #define DEBUG_VECTOR_VADDR              XCHAL_DEBUG_VECTOR_VADDR
 119
 120 #endif
 121
 122 #endif /* _XTENSA_VECTORS_H */