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
  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 /* Will Become VECBASE */
  51 #define VIRTUAL_MEMORY_ADDRESS          0xD0000000
  52
  53 /* Image Virtual Start Address */
  54 #define KERNELOFFSET                    0xD0003000
  55
  56 #if defined(XCHAL_HAVE_PTP_MMU) && XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY
  57   /* MMU v3  - XCHAL_HAVE_PTP_MMU  == 1 */
  58   #define LOAD_MEMORY_ADDRESS           0x00003000
  59 #else
  60   /* MMU V2 -  XCHAL_HAVE_PTP_MMU  == 0 */
  61   #define LOAD_MEMORY_ADDRESS           0xD0003000
  62 #endif
  63
  64 #define RESET_VECTOR1_VADDR             (VIRTUAL_MEMORY_ADDRESS + \
  65                                          XCHAL_RESET_VECTOR1_PADDR)
  66
  67 #else /* !defined(CONFIG_MMU) */
  68   /* MMU Not being used - Virtual == Physical */
  69
  70   /* VECBASE */
  71   #define VIRTUAL_MEMORY_ADDRESS        (PLATFORM_DEFAULT_MEM_START + 0x2000)
  72
  73   /* Location of the start of the kernel text, _start */
  74   #define KERNELOFFSET                  (PLATFORM_DEFAULT_MEM_START + 0x3000)
  75
  76   /* Loaded just above possibly live vectors */
  77   #define LOAD_MEMORY_ADDRESS           (PLATFORM_DEFAULT_MEM_START + 0x3000)
  78
  79 #define RESET_VECTOR1_VADDR             (XCHAL_RESET_VECTOR1_VADDR)
  80
  81 #endif /* CONFIG_MMU */
  82
  83 #define XC_VADDR(offset)                (VIRTUAL_MEMORY_ADDRESS  + offset)
  84
  85 /* Used to set VECBASE register */
  86 #define VECBASE_RESET_VADDR             VIRTUAL_MEMORY_ADDRESS
  87
  88 #if defined(XCHAL_HAVE_VECBASE) && XCHAL_HAVE_VECBASE
  89
  90 #define USER_VECTOR_VADDR               XC_VADDR(XCHAL_USER_VECOFS)
  91 #define KERNEL_VECTOR_VADDR             XC_VADDR(XCHAL_KERNEL_VECOFS)
  92 #define DOUBLEEXC_VECTOR_VADDR          XC_VADDR(XCHAL_DOUBLEEXC_VECOFS)
  93 #define WINDOW_VECTORS_VADDR            XC_VADDR(XCHAL_WINDOW_OF4_VECOFS)
  94 #define INTLEVEL2_VECTOR_VADDR          XC_VADDR(XCHAL_INTLEVEL2_VECOFS)
  95 #define INTLEVEL3_VECTOR_VADDR          XC_VADDR(XCHAL_INTLEVEL3_VECOFS)
  96 #define INTLEVEL4_VECTOR_VADDR          XC_VADDR(XCHAL_INTLEVEL4_VECOFS)
  97 #define INTLEVEL5_VECTOR_VADDR          XC_VADDR(XCHAL_INTLEVEL5_VECOFS)
  98 #define INTLEVEL6_VECTOR_VADDR          XC_VADDR(XCHAL_INTLEVEL6_VECOFS)
  99
 100 #define DEBUG_VECTOR_VADDR              XC_VADDR(XCHAL_DEBUG_VECOFS)
 101
 102 #define NMI_VECTOR_VADDR                XC_VADDR(XCHAL_NMI_VECOFS)
 103
 104 #define INTLEVEL7_VECTOR_VADDR          XC_VADDR(XCHAL_INTLEVEL7_VECOFS)
 105
 106 /*
 107  * These XCHAL_* #defines from varian/core.h
 108  * are not valid to use with V3 MMU. Non-XCHAL
 109  * constants are defined above and should be used.
 110  */
 111 #undef  XCHAL_VECBASE_RESET_VADDR
 112 #undef  XCHAL_RESET_VECTOR0_VADDR
 113 #undef  XCHAL_USER_VECTOR_VADDR
 114 #undef  XCHAL_KERNEL_VECTOR_VADDR
 115 #undef  XCHAL_DOUBLEEXC_VECTOR_VADDR
 116 #undef  XCHAL_WINDOW_VECTORS_VADDR
 117 #undef  XCHAL_INTLEVEL2_VECTOR_VADDR
 118 #undef  XCHAL_INTLEVEL3_VECTOR_VADDR
 119 #undef  XCHAL_INTLEVEL4_VECTOR_VADDR
 120 #undef  XCHAL_INTLEVEL5_VECTOR_VADDR
 121 #undef  XCHAL_INTLEVEL6_VECTOR_VADDR
 122 #undef  XCHAL_DEBUG_VECTOR_VADDR
 123 #undef  XCHAL_NMI_VECTOR_VADDR
 124 #undef  XCHAL_INTLEVEL7_VECTOR_VADDR
 125
 126 #else
 127
 128 #define USER_VECTOR_VADDR               XCHAL_USER_VECTOR_VADDR
 129 #define KERNEL_VECTOR_VADDR             XCHAL_KERNEL_VECTOR_VADDR
 130 #define DOUBLEEXC_VECTOR_VADDR          XCHAL_DOUBLEEXC_VECTOR_VADDR
 131 #define WINDOW_VECTORS_VADDR            XCHAL_WINDOW_VECTORS_VADDR
 132 #define INTLEVEL2_VECTOR_VADDR          XCHAL_INTLEVEL2_VECTOR_VADDR
 133 #define INTLEVEL3_VECTOR_VADDR          XCHAL_INTLEVEL3_VECTOR_VADDR
 134 #define INTLEVEL4_VECTOR_VADDR          XCHAL_INTLEVEL4_VECTOR_VADDR
 135 #define INTLEVEL5_VECTOR_VADDR          XCHAL_INTLEVEL5_VECTOR_VADDR
 136 #define INTLEVEL6_VECTOR_VADDR          XCHAL_INTLEVEL6_VECTOR_VADDR
 137 #define DEBUG_VECTOR_VADDR              XCHAL_DEBUG_VECTOR_VADDR
 138
 139 #endif
 140
 141 #endif /* _XTENSA_VECTORS_H */