boot.h

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#ifndef _ASM_X86_BOOT_H
#define _ASM_X86_BOOT_H

/* Internal svga startup constants */
#define NORMAL_VGA  0xffff      /* 80x25 mode */
#define EXTENDED_VGA    0xfffe      /* 80x50 mode */
#define ASK_VGA     0xfffd      /* ask for it at bootup */

#ifdef __KERNEL__

#include <asm/pgtable_types.h>

/* Physical address where kernel should be loaded. */
#define LOAD_PHYSICAL_ADDR ((CONFIG_PHYSICAL_START \
                + (CONFIG_PHYSICAL_ALIGN - 1)) \
                & ~(CONFIG_PHYSICAL_ALIGN - 1))

/* Minimum kernel alignment, as a power of two */
#ifdef CONFIG_X86_64
#define MIN_KERNEL_ALIGN_LG2    PMD_SHIFT
#else
#define MIN_KERNEL_ALIGN_LG2    (PAGE_SHIFT + THREAD_SIZE_ORDER)
#endif
#define MIN_KERNEL_ALIGN    (_AC(1, UL) << MIN_KERNEL_ALIGN_LG2)

#if (CONFIG_PHYSICAL_ALIGN & (CONFIG_PHYSICAL_ALIGN-1)) || \
    (CONFIG_PHYSICAL_ALIGN < MIN_KERNEL_ALIGN)
#error "Invalid value for CONFIG_PHYSICAL_ALIGN"
#endif

#ifdef CONFIG_KERNEL_BZIP2
#define BOOT_HEAP_SIZE             0x400000
#else /* !CONFIG_KERNEL_BZIP2 */

#define BOOT_HEAP_SIZE  0x8000

#endif /* !CONFIG_KERNEL_BZIP2 */

#ifdef CONFIG_X86_64
#define BOOT_STACK_SIZE 0x4000
#else
#define BOOT_STACK_SIZE 0x1000
#endif

#endif /* __KERNEL__ */

#endif /* _ASM_X86_BOOT_H */