x86, boot: Define the 2.12 bzImage boot protocol

[platform/adaptation/renesas_rcar/renesas_kernel.git] / arch / x86 / include / uapi / asm / bootparam.h

diff --git a/arch/x86/include/uapi/asm/bootparam.h b/arch/x86/include/uapi/asm/bootparam.h
index 92862cd..c15ddaf 100644 (file)
--- a/arch/x86/include/uapi/asm/bootparam.h
+++ b/arch/x86/include/uapi/asm/bootparam.h
@@ -1,6 +1,31 @@
 #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>
@@ -9,12 +34,6 @@
 #include <asm/ist.h>
 #include <video/edid.h>
 
-/* setup data types */
-#define SETUP_NONE                     0
-#define SETUP_E820_EXT                 1
-#define SETUP_DTB                      2
-#define SETUP_PCI                      3
-
 /* extensible setup data list node */
 struct setup_data {
        __u64 next;
@@ -28,9 +47,6 @@ struct setup_header {
        __u16   root_flags;
        __u32   syssize;
        __u16   ram_size;
-#define RAMDISK_IMAGE_START_MASK       0x07FF
-#define RAMDISK_PROMPT_FLAG            0x8000
-#define RAMDISK_LOAD_FLAG              0x4000
        __u16   vid_mode;
        __u16   root_dev;
        __u16   boot_flag;
@@ -42,10 +58,6 @@ struct setup_header {
        __u16   kernel_version;
        __u8    type_of_loader;
        __u8    loadflags;
-#define LOADED_HIGH    (1<<0)
-#define QUIET_FLAG     (1<<5)
-#define KEEP_SEGMENTS  (1<<6)
-#define CAN_USE_HEAP   (1<<7)
        __u16   setup_move_size;
        __u32   code32_start;
        __u32   ramdisk_image;
@@ -58,7 +70,8 @@ struct setup_header {
        __u32   initrd_addr_max;
        __u32   kernel_alignment;
        __u8    relocatable_kernel;
-       __u8    _pad2[3];
+       __u8    min_alignment;
+       __u16   xloadflags;
        __u32   cmdline_size;
        __u32   hardware_subarch;
        __u64   hardware_subarch_data;
@@ -106,7 +119,10 @@ struct boot_params {
        __u8  hd1_info[16];     /* obsolete! */         /* 0x090 */
        struct sys_desc_table sys_desc_table;           /* 0x0a0 */
        struct olpc_ofw_header olpc_ofw_header;         /* 0x0b0 */
-       __u8  _pad4[128];                               /* 0x0c0 */
+       __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 */
@@ -115,7 +131,20 @@ struct boot_params {
        __u8  eddbuf_entries;                           /* 0x1e9 */
        __u8  edd_mbr_sig_buf_entries;                  /* 0x1ea */
        __u8  kbd_status;                               /* 0x1eb */
-       __u8  _pad6[5];                                 /* 0x1ec */
+       __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 */
@@ -134,6 +163,6 @@ enum {
        X86_NR_SUBARCHS,
 };
 
-
+#endif /* __ASSEMBLY__ */
 
 #endif /* _ASM_X86_BOOTPARAM_H */