arch/x86/include/asm/boot.h

   1 #ifndef _ASM_X86_BOOT_H
   2 #define _ASM_X86_BOOT_H
   3
   4
   5 #include <asm/pgtable_types.h>
   6 #include <uapi/asm/boot.h>
   7
   8 /* Physical address where kernel should be loaded. */
   9 #define LOAD_PHYSICAL_ADDR ((CONFIG_PHYSICAL_START \
  10                                 + (CONFIG_PHYSICAL_ALIGN - 1)) \
  11                                 & ~(CONFIG_PHYSICAL_ALIGN - 1))
  12
  13 /* Minimum kernel alignment, as a power of two */
  14 #ifdef CONFIG_X86_64
  15 # define MIN_KERNEL_ALIGN_LG2   PMD_SHIFT
  16 #else
  17 # define MIN_KERNEL_ALIGN_LG2   (PAGE_SHIFT + THREAD_SIZE_ORDER)
  18 #endif
  19 #define MIN_KERNEL_ALIGN        (_AC(1, UL) << MIN_KERNEL_ALIGN_LG2)
  20
  21 #if (CONFIG_PHYSICAL_ALIGN & (CONFIG_PHYSICAL_ALIGN-1)) || \
  22         (CONFIG_PHYSICAL_ALIGN < MIN_KERNEL_ALIGN)
  23 # error "Invalid value for CONFIG_PHYSICAL_ALIGN"
  24 #endif
  25
  26 #ifdef CONFIG_KERNEL_BZIP2
  27 # define BOOT_HEAP_SIZE         0x400000
  28 #else /* !CONFIG_KERNEL_BZIP2 */
  29 # define BOOT_HEAP_SIZE          0x10000
  30 #endif
  31
  32 #ifdef CONFIG_X86_64
  33 # define BOOT_STACK_SIZE        0x4000
  34
  35 # define BOOT_INIT_PGT_SIZE     (6*4096)
  36 # ifdef CONFIG_RANDOMIZE_BASE
  37 /*
  38  * Assuming all cross the 512GB boundary:
  39  * 1 page for level4
  40  * (2+2)*4 pages for kernel, param, cmd_line, and randomized kernel
  41  * 2 pages for first 2M (video RAM: CONFIG_X86_VERBOSE_BOOTUP).
  42  * Total is 19 pages.
  43  */
  44 #  ifdef CONFIG_X86_VERBOSE_BOOTUP
  45 #   define BOOT_PGT_SIZE        (19*4096)
  46 #  else /* !CONFIG_X86_VERBOSE_BOOTUP */
  47 #   define BOOT_PGT_SIZE        (17*4096)
  48 #  endif
  49 # else /* !CONFIG_RANDOMIZE_BASE */
  50 #  define BOOT_PGT_SIZE         BOOT_INIT_PGT_SIZE
  51 # endif
  52
  53 #else /* !CONFIG_X86_64 */
  54 # define BOOT_STACK_SIZE        0x1000
  55 #endif
  56
  57 #endif /* _ASM_X86_BOOT_H */