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/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_X86_SETUP_H #define _ASM_X86_SETUP_H #include <uapi/asm/setup.h> #define COMMAND_LINE_SIZE 2048 #include <linux/linkage.h> #include <asm/page_types.h> #ifdef __i386__ #include <linux/pfn.h> /* * Reserved space for vmalloc and iomap - defined in asm/page.h */ #define MAXMEM_PFN PFN_DOWN(MAXMEM) #define MAX_NONPAE_PFN (1 << 20) #endif /* __i386__ */ #define PARAM_SIZE 4096 /* sizeof(struct boot_params) */ #define OLD_CL_MAGIC 0xA33F #define OLD_CL_ADDRESS 0x020 /* Relative to real mode data */ #define NEW_CL_POINTER 0x228 /* Relative to real mode data */ #ifndef __ASSEMBLY__ #include <asm/bootparam.h> #include <asm/x86_init.h> extern u64 relocated_ramdisk; /* Interrupt control for vSMPowered x86_64 systems */ #ifdef CONFIG_X86_64 void vsmp_init(void); #else static inline void vsmp_init(void) { } #endif void setup_bios_corruption_check(void); void early_platform_quirks(void); extern unsigned long saved_video_mode; extern void reserve_standard_io_resources(void); extern void i386_reserve_resources(void); extern unsigned long __startup_64(unsigned long physaddr, struct boot_params *bp); extern unsigned long __startup_secondary_64(void); extern int early_make_pgtable(unsigned long address); #ifdef CONFIG_X86_INTEL_MID extern void x86_intel_mid_early_setup(void); #else static inline void x86_intel_mid_early_setup(void) { } #endif #ifdef CONFIG_X86_INTEL_CE extern void x86_ce4100_early_setup(void); #else static inline void x86_ce4100_early_setup(void) { } #endif #ifndef _SETUP #include <asm/espfix.h> #include <linux/kernel.h> /* * This is set up by the setup-routine at boot-time */ extern struct boot_params boot_params; extern char _text[]; static inline bool kaslr_enabled(void) { return !!(boot_params.hdr.loadflags & KASLR_FLAG); } static inline unsigned long kaslr_offset(void) { return (unsigned long)&_text - __START_KERNEL; } /* * Do NOT EVER look at the BIOS memory size location. * It does not work on many machines. */ #define LOWMEMSIZE() (0x9f000) /* exceedingly early brk-like allocator */ extern unsigned long _brk_end; void *extend_brk(size_t size, size_t align); /* * Reserve space in the .brk section, which is a block of memory from which the * caller is allowed to allocate very early (before even memblock is available) * by calling extend_brk(). All allocated memory will be eventually converted * to memblock. Any leftover unallocated memory will be freed. * * The size is in bytes. */ #define RESERVE_BRK(name, size) \ __section(.bss..brk) __aligned(1) __used \ static char __brk_##name[size] /* Helper for reserving space for arrays of things */ #define RESERVE_BRK_ARRAY(type, name, entries) \ type *name; \ RESERVE_BRK(name, sizeof(type) * entries) extern void probe_roms(void); #ifdef __i386__ asmlinkage void __init i386_start_kernel(void); #else asmlinkage void __init x86_64_start_kernel(char *real_mode); asmlinkage void __init x86_64_start_reservations(char *real_mode_data); #endif /* __i386__ */ #endif /* _SETUP */ #else /* __ASSEMBLY */ .macro __RESERVE_BRK name, size .pushsection .bss..brk, "aw" SYM_DATA_START(__brk_\name) .skip \size SYM_DATA_END(__brk_\name) .popsection .endm #define RESERVE_BRK(name, size) __RESERVE_BRK name, size #endif /* __ASSEMBLY__ */ #endif /* _ASM_X86_SETUP_H */
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