LXR linux/arch/xtensa/include/asm/kmem

   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
  76