arch/x86/include/asm/setup.h

Source file repositories/reference/linux-study-clean/arch/x86/include/asm/setup.h

File Facts

System
Linux kernel
Corpus path
arch/x86/include/asm/setup.h
Extension
.h
Size
3993 bytes
Lines
164
Domain
Architecture Layer
Bucket
arch/x86
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

static inline void vsmp_init(void) { }
#endif

struct pt_regs;

void setup_bios_corruption_check(void);
void early_platform_quirks(void);

extern unsigned long saved_video_mode;
extern unsigned long acpi_realmode_flags;

extern void reserve_standard_io_resources(void);
extern void i386_reserve_resources(void);
extern unsigned long __startup_64(unsigned long p2v_offset, struct boot_params *bp);
extern void startup_64_setup_gdt_idt(void);
extern void startup_64_load_idt(void *vc_handler);
extern void __pi_startup_64_load_idt(void *vc_handler);
extern void early_setup_idt(void);
extern void __init do_early_exception(struct pt_regs *regs, int trapnr);

#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

#include <linux/kexec_handover.h>

#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 IS_ENABLED(CONFIG_RANDOMIZE_MEMORY) &&
		!!(boot_params.hdr.loadflags & KASLR_FLAG);
}

/*
 * Apply no randomization if KASLR was disabled at boot or if KASAN
 * is enabled. KASAN shadow mappings rely on regions being PGD aligned.
 */
static inline bool kaslr_memory_enabled(void)
{
	return kaslr_enabled() && !IS_ENABLED(CONFIG_KASAN);
}

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]

extern void probe_roms(void);

void clear_bss(void);

Annotation

Implementation Notes