boot.h (1807B)
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#if defined(CONFIG_KERNEL_BZIP2) 28# define BOOT_HEAP_SIZE 0x400000 29#elif defined(CONFIG_KERNEL_ZSTD) 30/* 31 * Zstd needs to allocate the ZSTD_DCtx in order to decompress the kernel. 32 * The ZSTD_DCtx is ~160KB, so set the heap size to 192KB because it is a 33 * round number and to allow some slack. 34 */ 35# define BOOT_HEAP_SIZE 0x30000 36#else 37# define BOOT_HEAP_SIZE 0x10000 38#endif 39 40#ifdef CONFIG_X86_64 41# define BOOT_STACK_SIZE 0x4000 42 43# define BOOT_INIT_PGT_SIZE (6*4096) 44# ifdef CONFIG_RANDOMIZE_BASE 45/* 46 * Assuming all cross the 512GB boundary: 47 * 1 page for level4 48 * (2+2)*4 pages for kernel, param, cmd_line, and randomized kernel 49 * 2 pages for first 2M (video RAM: CONFIG_X86_VERBOSE_BOOTUP). 50 * Total is 19 pages. 51 */ 52# ifdef CONFIG_X86_VERBOSE_BOOTUP 53# define BOOT_PGT_SIZE (19*4096) 54# else /* !CONFIG_X86_VERBOSE_BOOTUP */ 55# define BOOT_PGT_SIZE (17*4096) 56# endif 57# else /* !CONFIG_RANDOMIZE_BASE */ 58# define BOOT_PGT_SIZE BOOT_INIT_PGT_SIZE 59# endif 60 61#else /* !CONFIG_X86_64 */ 62# define BOOT_STACK_SIZE 0x1000 63#endif 64 65#endif /* _ASM_X86_BOOT_H */