diff options
Diffstat (limited to 'arch/x86/realmode/rm/wakeup.h')
| -rw-r--r-- | arch/x86/realmode/rm/wakeup.h | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/arch/x86/realmode/rm/wakeup.h b/arch/x86/realmode/rm/wakeup.h new file mode 100644 index 0000000000..0e4fd08ae4 --- /dev/null +++ b/arch/x86/realmode/rm/wakeup.h @@ -0,0 +1,43 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Definitions for the wakeup data structure at the head of the + * wakeup code. + */ + +#ifndef ARCH_X86_KERNEL_ACPI_RM_WAKEUP_H +#define ARCH_X86_KERNEL_ACPI_RM_WAKEUP_H + +#ifndef __ASSEMBLY__ +#include <linux/types.h> + +/* This must match data at wakeup.S */ +struct wakeup_header { + u16 video_mode; /* Video mode number */ + u32 pmode_entry; /* Protected mode resume point, 32-bit only */ + u16 pmode_cs; + u32 pmode_cr0; /* Protected mode cr0 */ + u32 pmode_cr3; /* Protected mode cr3 */ + u32 pmode_cr4; /* Protected mode cr4 */ + u32 pmode_efer_low; /* Protected mode EFER */ + u32 pmode_efer_high; + u64 pmode_gdt; + u32 pmode_misc_en_low; /* Protected mode MISC_ENABLE */ + u32 pmode_misc_en_high; + u32 pmode_behavior; /* Wakeup routine behavior flags */ + u32 realmode_flags; + u32 real_magic; + u32 signature; /* To check we have correct structure */ +} __attribute__((__packed__)); + +extern struct wakeup_header wakeup_header; +#endif + +#define WAKEUP_HEADER_OFFSET 8 +#define WAKEUP_HEADER_SIGNATURE 0x51ee1111 + +/* Wakeup behavior bits */ +#define WAKEUP_BEHAVIOR_RESTORE_MISC_ENABLE 0 +#define WAKEUP_BEHAVIOR_RESTORE_CR4 1 +#define WAKEUP_BEHAVIOR_RESTORE_EFER 2 + +#endif /* ARCH_X86_KERNEL_ACPI_RM_WAKEUP_H */ |