root/arch/xtensa/include/asm/kmem_layout.h

INCLUDED FROM

   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/types.h>
  15 
  16 #ifdef CONFIG_MMU
  17 
  18 /*
  19  * Fixed TLB translations in the processor.
  20  */
  21 
  22 #define XCHAL_PAGE_TABLE_VADDR  __XTENSA_UL_CONST(0x80000000)
  23 #define XCHAL_PAGE_TABLE_SIZE   __XTENSA_UL_CONST(0x00400000)
  24 
  25 #if defined(CONFIG_XTENSA_KSEG_MMU_V2)
  26 
  27 #define XCHAL_KSEG_CACHED_VADDR __XTENSA_UL_CONST(0xd0000000)
  28 #define XCHAL_KSEG_BYPASS_VADDR __XTENSA_UL_CONST(0xd8000000)
  29 #define XCHAL_KSEG_SIZE         __XTENSA_UL_CONST(0x08000000)
  30 #define XCHAL_KSEG_ALIGNMENT    __XTENSA_UL_CONST(0x08000000)
  31 #define XCHAL_KSEG_TLB_WAY      5
  32 #define XCHAL_KIO_TLB_WAY       6
  33 
  34 #elif defined(CONFIG_XTENSA_KSEG_256M)
  35 
  36 #define XCHAL_KSEG_CACHED_VADDR __XTENSA_UL_CONST(0xb0000000)
  37 #define XCHAL_KSEG_BYPASS_VADDR __XTENSA_UL_CONST(0xc0000000)
  38 #define XCHAL_KSEG_SIZE         __XTENSA_UL_CONST(0x10000000)
  39 #define XCHAL_KSEG_ALIGNMENT    __XTENSA_UL_CONST(0x10000000)
  40 #define XCHAL_KSEG_TLB_WAY      6
  41 #define XCHAL_KIO_TLB_WAY       6
  42 
  43 #elif defined(CONFIG_XTENSA_KSEG_512M)
  44 
  45 #define XCHAL_KSEG_CACHED_VADDR __XTENSA_UL_CONST(0xa0000000)
  46 #define XCHAL_KSEG_BYPASS_VADDR __XTENSA_UL_CONST(0xc0000000)
  47 #define XCHAL_KSEG_SIZE         __XTENSA_UL_CONST(0x20000000)
  48 #define XCHAL_KSEG_ALIGNMENT    __XTENSA_UL_CONST(0x10000000)
  49 #define XCHAL_KSEG_TLB_WAY      6
  50 #define XCHAL_KIO_TLB_WAY       6
  51 
  52 #else
  53 #error Unsupported KSEG configuration
  54 #endif
  55 
  56 #ifdef CONFIG_KSEG_PADDR
  57 #define XCHAL_KSEG_PADDR        __XTENSA_UL_CONST(CONFIG_KSEG_PADDR)
  58 #else
  59 #define XCHAL_KSEG_PADDR        __XTENSA_UL_CONST(0x00000000)
  60 #endif
  61 
  62 #if XCHAL_KSEG_PADDR & (XCHAL_KSEG_ALIGNMENT - 1)
  63 #error XCHAL_KSEG_PADDR is not properly aligned to XCHAL_KSEG_ALIGNMENT
  64 #endif
  65 
  66 #endif
  67 
  68 #ifndef CONFIG_KASAN
  69 #define KERNEL_STACK_SHIFT      13
  70 #else
  71 #define KERNEL_STACK_SHIFT      15
  72 #endif
  73 #define KERNEL_STACK_SIZE       (1 << KERNEL_STACK_SHIFT)
  74 
  75 #endif