mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-26 16:15:05 +07:00
09c205afde
Define the 2.12 bzImage boot protocol: add xloadflags and additional fields to allow the command line, initramfs and struct boot_params to live above the 4 GiB mark. The xloadflags now communicates if this is a 64-bit kernel with the legacy 64-bit entry point and which of the EFI handover entry points are supported. Avoid adding new read flags to loadflags because of claimed bootloaders testing the whole byte for == 1 to determine bzImageness at least until the issue can be researched further. This is based on patches by Yinghai Lu and David Woodhouse. Originally-by: Yinghai Lu <yinghai@kernel.org> Originally-by: David Woodhouse <dwmw2@infradead.org> Acked-by: Yinghai Lu <yinghai@kernel.org> Acked-by: David Woodhouse <dwmw2@infradead.org> Acked-by: Matt Fleming <matt.fleming@intel.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Link: http://lkml.kernel.org/r/1359058816-7615-26-git-send-email-yinghai@kernel.org Cc: Rob Landley <rob@landley.net> Cc: Gokul Caushik <caushik1@gmail.com> Cc: Josh Triplett <josh@joshtriplett.org> Cc: Joe Millenbach <jmillenbach@gmail.com>
169 lines
4.3 KiB
C
169 lines
4.3 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
|
|
|
|
/* 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 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)
|
|
|
|
#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; /* 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_SUBARCH_PC = 0,
|
|
X86_SUBARCH_LGUEST,
|
|
X86_SUBARCH_XEN,
|
|
X86_SUBARCH_MRST,
|
|
X86_SUBARCH_CE4100,
|
|
X86_NR_SUBARCHS,
|
|
};
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
#endif /* _ASM_X86_BOOTPARAM_H */
|