8c5beb50d3
Because of the size limits of struct boot_params (zero page), the maximum number of E820 memory map entries can be passed to kernel is 128. As pointed by Paul Jackson, there is some machine produced by SGI with so many nodes that the number of E820 memory map entries is more than 128. To enabling Linux kernel on these system, a new setup data type named SETUP_E820_EXT is defined to pass additional memory map entries to Linux kernel. This patch is based on x86/auto-latest branch of git-x86 tree and has been tested on x86_64 and i386 platform. Signed-off-by: Huang Ying <ying.huang@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
113 lines
2.8 KiB
C
113 lines
2.8 KiB
C
#ifndef _ASM_BOOTPARAM_H
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#define _ASM_BOOTPARAM_H
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#include <linux/types.h>
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#include <linux/screen_info.h>
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#include <linux/apm_bios.h>
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#include <linux/edd.h>
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#include <asm/e820.h>
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#include <asm/ist.h>
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#include <video/edid.h>
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/* setup data types */
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#define SETUP_NONE 0
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#define SETUP_E820_EXT 1
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/* extensible setup data list node */
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struct setup_data {
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__u64 next;
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__u32 type;
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__u32 len;
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__u8 data[0];
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};
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struct setup_header {
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__u8 setup_sects;
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__u16 root_flags;
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__u32 syssize;
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__u16 ram_size;
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#define RAMDISK_IMAGE_START_MASK 0x07FF
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#define RAMDISK_PROMPT_FLAG 0x8000
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#define RAMDISK_LOAD_FLAG 0x4000
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__u16 vid_mode;
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__u16 root_dev;
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__u16 boot_flag;
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__u16 jump;
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__u32 header;
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__u16 version;
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__u32 realmode_swtch;
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__u16 start_sys;
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__u16 kernel_version;
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__u8 type_of_loader;
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__u8 loadflags;
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#define LOADED_HIGH (1<<0)
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#define KEEP_SEGMENTS (1<<6)
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#define CAN_USE_HEAP (1<<7)
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__u16 setup_move_size;
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__u32 code32_start;
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__u32 ramdisk_image;
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__u32 ramdisk_size;
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__u32 bootsect_kludge;
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__u16 heap_end_ptr;
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__u16 _pad1;
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__u32 cmd_line_ptr;
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__u32 initrd_addr_max;
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__u32 kernel_alignment;
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__u8 relocatable_kernel;
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__u8 _pad2[3];
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__u32 cmdline_size;
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__u32 hardware_subarch;
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__u64 hardware_subarch_data;
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__u32 payload_offset;
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__u32 payload_length;
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__u64 setup_data;
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} __attribute__((packed));
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struct sys_desc_table {
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__u16 length;
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__u8 table[14];
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};
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struct efi_info {
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__u32 efi_loader_signature;
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__u32 efi_systab;
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__u32 efi_memdesc_size;
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__u32 efi_memdesc_version;
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__u32 efi_memmap;
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__u32 efi_memmap_size;
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__u32 efi_systab_hi;
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__u32 efi_memmap_hi;
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};
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/* The so-called "zeropage" */
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struct boot_params {
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struct screen_info screen_info; /* 0x000 */
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struct apm_bios_info apm_bios_info; /* 0x040 */
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__u8 _pad2[12]; /* 0x054 */
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struct ist_info ist_info; /* 0x060 */
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__u8 _pad3[16]; /* 0x070 */
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__u8 hd0_info[16]; /* obsolete! */ /* 0x080 */
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__u8 hd1_info[16]; /* obsolete! */ /* 0x090 */
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struct sys_desc_table sys_desc_table; /* 0x0a0 */
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__u8 _pad4[144]; /* 0x0b0 */
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struct edid_info edid_info; /* 0x140 */
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struct efi_info efi_info; /* 0x1c0 */
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__u32 alt_mem_k; /* 0x1e0 */
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__u32 scratch; /* Scratch field! */ /* 0x1e4 */
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__u8 e820_entries; /* 0x1e8 */
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__u8 eddbuf_entries; /* 0x1e9 */
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__u8 edd_mbr_sig_buf_entries; /* 0x1ea */
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__u8 _pad6[6]; /* 0x1eb */
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struct setup_header hdr; /* setup header */ /* 0x1f1 */
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__u8 _pad7[0x290-0x1f1-sizeof(struct setup_header)];
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__u32 edd_mbr_sig_buffer[EDD_MBR_SIG_MAX]; /* 0x290 */
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struct e820entry e820_map[E820MAX]; /* 0x2d0 */
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__u8 _pad8[48]; /* 0xcd0 */
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struct edd_info eddbuf[EDDMAXNR]; /* 0xd00 */
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__u8 _pad9[276]; /* 0xeec */
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} __attribute__((packed));
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void reserve_setup_data(void);
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void parse_setup_data(void);
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#endif /* _ASM_BOOTPARAM_H */
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