root/arch/x86/include/asm/boot.h

INCLUDED FROM

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_X86_BOOT_H
   3 #define _ASM_X86_BOOT_H
   4 
   5 
   6 #include <asm/pgtable_types.h>
   7 #include <uapi/asm/boot.h>
   8 
   9 /* Physical address where kernel should be loaded. */
  10 #define LOAD_PHYSICAL_ADDR ((CONFIG_PHYSICAL_START \
  11                                 + (CONFIG_PHYSICAL_ALIGN - 1)) \
  12                                 & ~(CONFIG_PHYSICAL_ALIGN - 1))
  13 
  14 /* Minimum kernel alignment, as a power of two */
  15 #ifdef CONFIG_X86_64
  16 # define MIN_KERNEL_ALIGN_LG2   PMD_SHIFT
  17 #else
  18 # define MIN_KERNEL_ALIGN_LG2   (PAGE_SHIFT + THREAD_SIZE_ORDER)
  19 #endif
  20 #define MIN_KERNEL_ALIGN        (_AC(1, UL) << MIN_KERNEL_ALIGN_LG2)
  21 
  22 #if (CONFIG_PHYSICAL_ALIGN & (CONFIG_PHYSICAL_ALIGN-1)) || \
  23         (CONFIG_PHYSICAL_ALIGN < MIN_KERNEL_ALIGN)
  24 # error "Invalid value for CONFIG_PHYSICAL_ALIGN"
  25 #endif
  26 
  27 #ifdef CONFIG_KERNEL_BZIP2
  28 # define BOOT_HEAP_SIZE         0x400000
  29 #else /* !CONFIG_KERNEL_BZIP2 */
  30 # define BOOT_HEAP_SIZE          0x10000
  31 #endif
  32 
  33 #ifdef CONFIG_X86_64
  34 # define BOOT_STACK_SIZE        0x4000
  35 
  36 # define BOOT_INIT_PGT_SIZE     (6*4096)
  37 # ifdef CONFIG_RANDOMIZE_BASE
  38 /*
  39  * Assuming all cross the 512GB boundary:
  40  * 1 page for level4
  41  * (2+2)*4 pages for kernel, param, cmd_line, and randomized kernel
  42  * 2 pages for first 2M (video RAM: CONFIG_X86_VERBOSE_BOOTUP).
  43  * Total is 19 pages.
  44  */
  45 #  ifdef CONFIG_X86_VERBOSE_BOOTUP
  46 #   define BOOT_PGT_SIZE        (19*4096)
  47 #  else /* !CONFIG_X86_VERBOSE_BOOTUP */
  48 #   define BOOT_PGT_SIZE        (17*4096)
  49 #  endif
  50 # else /* !CONFIG_RANDOMIZE_BASE */
  51 #  define BOOT_PGT_SIZE         BOOT_INIT_PGT_SIZE
  52 # endif
  53 
  54 #else /* !CONFIG_X86_64 */
  55 # define BOOT_STACK_SIZE        0x1000
  56 #endif
  57 
  58 #endif /* _ASM_X86_BOOT_H */