mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-25 05:34:00 +08:00
18c78a9623
Although hardware_subarch has been in place since the x86 boot protocol 2.07 it hasn't been used much. Enumerate current possible values to avoid misuses and help with semantics later at boot time should this be used further. These enums should only ever be used by architecture x86 code, and all that code should be well contained and compartamentalized, clarify that as well. Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: andrew.cooper3@citrix.com Cc: andriy.shevchenko@linux.intel.com Cc: bigeasy@linutronix.de Cc: boris.ostrovsky@oracle.com Cc: david.vrabel@citrix.com Cc: ffainelli@freebox.fr Cc: george.dunlap@citrix.com Cc: glin@suse.com Cc: jgross@suse.com Cc: jlee@suse.com Cc: josh@joshtriplett.org Cc: julien.grall@linaro.org Cc: konrad.wilk@oracle.com Cc: kozerkov@parallels.com Cc: lenb@kernel.org Cc: lguest@lists.ozlabs.org Cc: linux-acpi@vger.kernel.org Cc: lv.zheng@intel.com Cc: matt@codeblueprint.co.uk Cc: mbizon@freebox.fr Cc: rjw@rjwysocki.net Cc: robert.moore@intel.com Cc: rusty@rustcorp.com.au Cc: tiwai@suse.de Cc: toshi.kani@hp.com Cc: xen-devel@lists.xensource.com Link: http://lkml.kernel.org/r/1460592286-300-2-git-send-email-mcgrof@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
211 lines
6.5 KiB
C
211 lines
6.5 KiB
C
#ifndef _ASM_X86_BOOTPARAM_H
|
|
#define _ASM_X86_BOOTPARAM_H
|
|
|
|
/* setup_data types */
|
|
#define SETUP_NONE 0
|
|
#define SETUP_E820_EXT 1
|
|
#define SETUP_DTB 2
|
|
#define SETUP_PCI 3
|
|
#define SETUP_EFI 4
|
|
|
|
/* ram_size flags */
|
|
#define RAMDISK_IMAGE_START_MASK 0x07FF
|
|
#define RAMDISK_PROMPT_FLAG 0x8000
|
|
#define RAMDISK_LOAD_FLAG 0x4000
|
|
|
|
/* loadflags */
|
|
#define LOADED_HIGH (1<<0)
|
|
#define KASLR_FLAG (1<<1)
|
|
#define QUIET_FLAG (1<<5)
|
|
#define KEEP_SEGMENTS (1<<6)
|
|
#define CAN_USE_HEAP (1<<7)
|
|
|
|
/* xloadflags */
|
|
#define XLF_KERNEL_64 (1<<0)
|
|
#define XLF_CAN_BE_LOADED_ABOVE_4G (1<<1)
|
|
#define XLF_EFI_HANDOVER_32 (1<<2)
|
|
#define XLF_EFI_HANDOVER_64 (1<<3)
|
|
#define XLF_EFI_KEXEC (1<<4)
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/screen_info.h>
|
|
#include <linux/apm_bios.h>
|
|
#include <linux/edd.h>
|
|
#include <asm/e820.h>
|
|
#include <asm/ist.h>
|
|
#include <video/edid.h>
|
|
|
|
/* extensible setup data list node */
|
|
struct setup_data {
|
|
__u64 next;
|
|
__u32 type;
|
|
__u32 len;
|
|
__u8 data[0];
|
|
};
|
|
|
|
struct setup_header {
|
|
__u8 setup_sects;
|
|
__u16 root_flags;
|
|
__u32 syssize;
|
|
__u16 ram_size;
|
|
__u16 vid_mode;
|
|
__u16 root_dev;
|
|
__u16 boot_flag;
|
|
__u16 jump;
|
|
__u32 header;
|
|
__u16 version;
|
|
__u32 realmode_swtch;
|
|
__u16 start_sys;
|
|
__u16 kernel_version;
|
|
__u8 type_of_loader;
|
|
__u8 loadflags;
|
|
__u16 setup_move_size;
|
|
__u32 code32_start;
|
|
__u32 ramdisk_image;
|
|
__u32 ramdisk_size;
|
|
__u32 bootsect_kludge;
|
|
__u16 heap_end_ptr;
|
|
__u8 ext_loader_ver;
|
|
__u8 ext_loader_type;
|
|
__u32 cmd_line_ptr;
|
|
__u32 initrd_addr_max;
|
|
__u32 kernel_alignment;
|
|
__u8 relocatable_kernel;
|
|
__u8 min_alignment;
|
|
__u16 xloadflags;
|
|
__u32 cmdline_size;
|
|
__u32 hardware_subarch;
|
|
__u64 hardware_subarch_data;
|
|
__u32 payload_offset;
|
|
__u32 payload_length;
|
|
__u64 setup_data;
|
|
__u64 pref_address;
|
|
__u32 init_size;
|
|
__u32 handover_offset;
|
|
} __attribute__((packed));
|
|
|
|
struct sys_desc_table {
|
|
__u16 length;
|
|
__u8 table[14];
|
|
};
|
|
|
|
/* Gleaned from OFW's set-parameters in cpu/x86/pc/linux.fth */
|
|
struct olpc_ofw_header {
|
|
__u32 ofw_magic; /* OFW signature */
|
|
__u32 ofw_version;
|
|
__u32 cif_handler; /* callback into OFW */
|
|
__u32 irq_desc_table;
|
|
} __attribute__((packed));
|
|
|
|
struct efi_info {
|
|
__u32 efi_loader_signature;
|
|
__u32 efi_systab;
|
|
__u32 efi_memdesc_size;
|
|
__u32 efi_memdesc_version;
|
|
__u32 efi_memmap;
|
|
__u32 efi_memmap_size;
|
|
__u32 efi_systab_hi;
|
|
__u32 efi_memmap_hi;
|
|
};
|
|
|
|
/* The so-called "zeropage" */
|
|
struct boot_params {
|
|
struct screen_info screen_info; /* 0x000 */
|
|
struct apm_bios_info apm_bios_info; /* 0x040 */
|
|
__u8 _pad2[4]; /* 0x054 */
|
|
__u64 tboot_addr; /* 0x058 */
|
|
struct ist_info ist_info; /* 0x060 */
|
|
__u8 _pad3[16]; /* 0x070 */
|
|
__u8 hd0_info[16]; /* obsolete! */ /* 0x080 */
|
|
__u8 hd1_info[16]; /* obsolete! */ /* 0x090 */
|
|
struct sys_desc_table sys_desc_table; /* obsolete! */ /* 0x0a0 */
|
|
struct olpc_ofw_header olpc_ofw_header; /* 0x0b0 */
|
|
__u32 ext_ramdisk_image; /* 0x0c0 */
|
|
__u32 ext_ramdisk_size; /* 0x0c4 */
|
|
__u32 ext_cmd_line_ptr; /* 0x0c8 */
|
|
__u8 _pad4[116]; /* 0x0cc */
|
|
struct edid_info edid_info; /* 0x140 */
|
|
struct efi_info efi_info; /* 0x1c0 */
|
|
__u32 alt_mem_k; /* 0x1e0 */
|
|
__u32 scratch; /* Scratch field! */ /* 0x1e4 */
|
|
__u8 e820_entries; /* 0x1e8 */
|
|
__u8 eddbuf_entries; /* 0x1e9 */
|
|
__u8 edd_mbr_sig_buf_entries; /* 0x1ea */
|
|
__u8 kbd_status; /* 0x1eb */
|
|
__u8 _pad5[3]; /* 0x1ec */
|
|
/*
|
|
* The sentinel is set to a nonzero value (0xff) in header.S.
|
|
*
|
|
* A bootloader is supposed to only take setup_header and put
|
|
* it into a clean boot_params buffer. If it turns out that
|
|
* it is clumsy or too generous with the buffer, it most
|
|
* probably will pick up the sentinel variable too. The fact
|
|
* that this variable then is still 0xff will let kernel
|
|
* know that some variables in boot_params are invalid and
|
|
* kernel should zero out certain portions of boot_params.
|
|
*/
|
|
__u8 sentinel; /* 0x1ef */
|
|
__u8 _pad6[1]; /* 0x1f0 */
|
|
struct setup_header hdr; /* setup header */ /* 0x1f1 */
|
|
__u8 _pad7[0x290-0x1f1-sizeof(struct setup_header)];
|
|
__u32 edd_mbr_sig_buffer[EDD_MBR_SIG_MAX]; /* 0x290 */
|
|
struct e820entry e820_map[E820MAX]; /* 0x2d0 */
|
|
__u8 _pad8[48]; /* 0xcd0 */
|
|
struct edd_info eddbuf[EDDMAXNR]; /* 0xd00 */
|
|
__u8 _pad9[276]; /* 0xeec */
|
|
} __attribute__((packed));
|
|
|
|
/**
|
|
* enum x86_hardware_subarch - x86 hardware subarchitecture
|
|
*
|
|
* The x86 hardware_subarch and hardware_subarch_data were added as of the x86
|
|
* boot protocol 2.07 to help distinguish and support custom x86 boot
|
|
* sequences. This enum represents accepted values for the x86
|
|
* hardware_subarch. Custom x86 boot sequences (not X86_SUBARCH_PC) do not
|
|
* have or simply *cannot* make use of natural stubs like BIOS or EFI, the
|
|
* hardware_subarch can be used on the Linux entry path to revector to a
|
|
* subarchitecture stub when needed. This subarchitecture stub can be used to
|
|
* set up Linux boot parameters or for special care to account for nonstandard
|
|
* handling of page tables.
|
|
*
|
|
* These enums should only ever be used by x86 code, and the code that uses
|
|
* it should be well contained and compartamentalized.
|
|
*
|
|
* KVM and Xen HVM do not have a subarch as these are expected to follow
|
|
* standard x86 boot entries. If there is a genuine need for "hypervisor" type
|
|
* that should be considered separately in the future. Future guest types
|
|
* should seriously consider working with standard x86 boot stubs such as
|
|
* the BIOS or EFI boot stubs.
|
|
*
|
|
* WARNING: this enum is only used for legacy hacks, for platform features that
|
|
* are not easily enumerated or discoverable. You should not ever use
|
|
* this for new features.
|
|
*
|
|
* @X86_SUBARCH_PC: Should be used if the hardware is enumerable using standard
|
|
* PC mechanisms (PCI, ACPI) and doesn't need a special boot flow.
|
|
* @X86_SUBARCH_LGUEST: Used for x86 hypervisor demo, lguest
|
|
* @X86_SUBARCH_XEN: Used for Xen guest types which follow the PV boot path,
|
|
* which start at asm startup_xen() entry point and later jump to the C
|
|
* xen_start_kernel() entry point. Both domU and dom0 type of guests are
|
|
* currently supportd through this PV boot path.
|
|
* @X86_SUBARCH_INTEL_MID: Used for Intel MID (Mobile Internet Device) platform
|
|
* systems which do not have the PCI legacy interfaces.
|
|
* @X86_SUBARCH_CE4100: Used for Intel CE media processor (CE4100) SoC for
|
|
* for settop boxes and media devices, the use of a subarch for CE4100
|
|
* is more of a hack...
|
|
*/
|
|
enum x86_hardware_subarch {
|
|
X86_SUBARCH_PC = 0,
|
|
X86_SUBARCH_LGUEST,
|
|
X86_SUBARCH_XEN,
|
|
X86_SUBARCH_INTEL_MID,
|
|
X86_SUBARCH_CE4100,
|
|
X86_NR_SUBARCHS,
|
|
};
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
#endif /* _ASM_X86_BOOTPARAM_H */
|