arch/xtensa/include/asm/kmem_layout.h

   1 /*
   2  * Kernel virtual memory layout definitions.
   3  *
   4  * This file is subject to the terms and conditions of the GNU General
   5  * Public License.  See the file "COPYING" in the main directory of
   6  * this archive for more details.
   7  *
   8  * Copyright (C) 2016 Cadence Design Systems Inc.
   9  */
  10
  11 #ifndef _XTENSA_KMEM_LAYOUT_H
  12 #define _XTENSA_KMEM_LAYOUT_H
  13
  14 #include <asm/core.h>
  15 #include <asm/types.h>
  16
  17 #ifdef CONFIG_MMU
  18
  19 /*
  20  * Fixed TLB translations in the processor.
  21  */
  22
  23 #define XCHAL_PAGE_TABLE_VADDR  __XTENSA_UL_CONST(0x80000000)
  24 #define XCHAL_PAGE_TABLE_SIZE   __XTENSA_UL_CONST(0x00400000)
  25
  26 #if defined(CONFIG_XTENSA_KSEG_MMU_V2)
  27
  28 #define XCHAL_KSEG_CACHED_VADDR __XTENSA_UL_CONST(0xd0000000)
  29 #define XCHAL_KSEG_BYPASS_VADDR __XTENSA_UL_CONST(0xd8000000)
  30 #define XCHAL_KSEG_SIZE         __XTENSA_UL_CONST(0x08000000)
  31 #define XCHAL_KSEG_ALIGNMENT    __XTENSA_UL_CONST(0x08000000)
  32 #define XCHAL_KSEG_TLB_WAY      5
  33 #define XCHAL_KIO_TLB_WAY       6
  34
  35 #elif defined(CONFIG_XTENSA_KSEG_256M)
  36
  37 #define XCHAL_KSEG_CACHED_VADDR __XTENSA_UL_CONST(0xb0000000)
  38 #define XCHAL_KSEG_BYPASS_VADDR __XTENSA_UL_CONST(0xc0000000)
  39 #define XCHAL_KSEG_SIZE         __XTENSA_UL_CONST(0x10000000)
  40 #define XCHAL_KSEG_ALIGNMENT    __XTENSA_UL_CONST(0x10000000)
  41 #define XCHAL_KSEG_TLB_WAY      6
  42 #define XCHAL_KIO_TLB_WAY       6
  43
  44 #elif defined(CONFIG_XTENSA_KSEG_512M)
  45
  46 #define XCHAL_KSEG_CACHED_VADDR __XTENSA_UL_CONST(0xa0000000)
  47 #define XCHAL_KSEG_BYPASS_VADDR __XTENSA_UL_CONST(0xc0000000)
  48 #define XCHAL_KSEG_SIZE         __XTENSA_UL_CONST(0x20000000)
  49 #define XCHAL_KSEG_ALIGNMENT    __XTENSA_UL_CONST(0x10000000)
  50 #define XCHAL_KSEG_TLB_WAY      6
  51 #define XCHAL_KIO_TLB_WAY       6
  52
  53 #else
  54 #error Unsupported KSEG configuration
  55 #endif
  56
  57 #ifdef CONFIG_KSEG_PADDR
  58 #define XCHAL_KSEG_PADDR        __XTENSA_UL_CONST(CONFIG_KSEG_PADDR)
  59 #else
  60 #define XCHAL_KSEG_PADDR        __XTENSA_UL_CONST(0x00000000)
  61 #endif
  62
  63 #if XCHAL_KSEG_PADDR & (XCHAL_KSEG_ALIGNMENT - 1)
  64 #error XCHAL_KSEG_PADDR is not properly aligned to XCHAL_KSEG_ALIGNMENT
  65 #endif
  66
  67 #endif
  68
  69 /* KIO definition */
  70
  71 #if XCHAL_HAVE_PTP_MMU
  72 #define XCHAL_KIO_CACHED_VADDR          0xe0000000
  73 #define XCHAL_KIO_BYPASS_VADDR          0xf0000000
  74 #define XCHAL_KIO_DEFAULT_PADDR         0xf0000000
  75 #else
  76 #define XCHAL_KIO_BYPASS_VADDR          XCHAL_KIO_PADDR
  77 #define XCHAL_KIO_DEFAULT_PADDR         0x90000000
  78 #endif
  79 #define XCHAL_KIO_SIZE                  0x10000000
  80
  81 #if (!XCHAL_HAVE_PTP_MMU || XCHAL_HAVE_SPANNING_WAY) && defined(CONFIG_USE_OF)
  82 #define XCHAL_KIO_PADDR                 xtensa_get_kio_paddr()
  83 #ifndef __ASSEMBLY__
  84 extern unsigned long xtensa_kio_paddr;
  85
  86 static inline unsigned long xtensa_get_kio_paddr(void)
  87 {
  88         return xtensa_kio_paddr;
  89 }
  90 #endif
  91 #else
  92 #define XCHAL_KIO_PADDR                 XCHAL_KIO_DEFAULT_PADDR
  93 #endif
  94
  95 /* KERNEL_STACK definition */
  96
  97 #ifndef CONFIG_KASAN
  98 #define KERNEL_STACK_SHIFT      13
  99 #else
 100 #define KERNEL_STACK_SHIFT      15
 101 #endif
 102 #define KERNEL_STACK_SIZE       (1 << KERNEL_STACK_SHIFT)
 103
 104 #endif