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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ARCH_X86_REALMODE_H
#define _ARCH_X86_REALMODE_H
/*
* Flag bit definitions for use with the flags field of the trampoline header
* in the CONFIG_X86_64 variant.
*/
#define TH_FLAGS_SME_ACTIVE_BIT 0
#define TH_FLAGS_SME_ACTIVE BIT(TH_FLAGS_SME_ACTIVE_BIT)
#ifndef __ASSEMBLY__
#include <linux/types.h>
#include <asm/io.h>
/* This must match data at realmode/rm/header.S */
struct real_mode_header {
u32 text_start;
u32 ro_end;
/* SMP trampoline */
u32 trampoline_start;
u32 trampoline_header;
#ifdef CONFIG_X86_64
u32 trampoline_pgd;
#endif
/* ACPI S3 wakeup */
#ifdef CONFIG_ACPI_SLEEP
u32 wakeup_start;
u32 wakeup_header;
#endif
/* APM/BIOS reboot */
u32 machine_real_restart_asm;
#ifdef CONFIG_X86_64
u32 machine_real_restart_seg;
#endif
};
/* This must match data at realmode/rm/trampoline_{32,64}.S */
struct trampoline_header {
#ifdef CONFIG_X86_32
u32 start;
u16 gdt_pad;
u16 gdt_limit;
u32 gdt_base;
#else
u64 start;
u64 efer;
u32 cr4;
u32 flags;
#endif
};
extern struct real_mode_header *real_mode_header;
extern unsigned char real_mode_blob_end[];
extern unsigned long initial_code;
extern unsigned long initial_gs;
extern unsigned long initial_stack;
extern unsigned char real_mode_blob[];
extern unsigned char real_mode_relocs[];
#ifdef CONFIG_X86_32
extern unsigned char startup_32_smp[];
extern unsigned char boot_gdt[];
#else
extern unsigned char secondary_startup_64[];
#endif
static inline size_t real_mode_size_needed(void)
{
if (real_mode_header)
return 0; /* already allocated. */
return ALIGN(real_mode_blob_end - real_mode_blob, PAGE_SIZE);
}
static inline void set_real_mode_mem(phys_addr_t mem)
{
real_mode_header = (struct real_mode_header *) __va(mem);
}
void reserve_real_mode(void);
#endif /* __ASSEMBLY__ */
#endif /* _ARCH_X86_REALMODE_H */
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