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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 */