diff options
Diffstat (limited to 'arch/x86/include/asm/boot.h')
| -rw-r--r-- | arch/x86/include/asm/boot.h | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/arch/x86/include/asm/boot.h b/arch/x86/include/asm/boot.h new file mode 100644 index 000000000..680c32036 --- /dev/null +++ b/arch/x86/include/asm/boot.h @@ -0,0 +1,58 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_X86_BOOT_H +#define _ASM_X86_BOOT_H + + +#include <asm/pgtable_types.h> +#include <uapi/asm/boot.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 0x10000 +#endif + +#ifdef CONFIG_X86_64 +# define BOOT_STACK_SIZE 0x4000 + +# define BOOT_INIT_PGT_SIZE (6*4096) +# ifdef CONFIG_RANDOMIZE_BASE +/* + * Assuming all cross the 512GB boundary: + * 1 page for level4 + * (2+2)*4 pages for kernel, param, cmd_line, and randomized kernel + * 2 pages for first 2M (video RAM: CONFIG_X86_VERBOSE_BOOTUP). + * Total is 19 pages. + */ +# ifdef CONFIG_X86_VERBOSE_BOOTUP +# define BOOT_PGT_SIZE (19*4096) +# else /* !CONFIG_X86_VERBOSE_BOOTUP */ +# define BOOT_PGT_SIZE (17*4096) +# endif +# else /* !CONFIG_RANDOMIZE_BASE */ +# define BOOT_PGT_SIZE BOOT_INIT_PGT_SIZE +# endif + +#else /* !CONFIG_X86_64 */ +# define BOOT_STACK_SIZE 0x1000 +#endif + +#endif /* _ASM_X86_BOOT_H */ |