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x86, boot: add linked list of struct setup_data

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This patch adds a field of 64-bit physical pointer to NULL terminated
single linked list of struct setup_data to real-mode kernel
header. This is used as a more extensible boot parameters passing
mechanism.

Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Huang, Ying
2008-03-28 10:49:44 +08:00
committed by Ingo Molnar
parent 50eae2a7c9
commit 8b664aa66e
4 changed files with 61 additions and 1 deletions
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14
include/asm-x86/bootparam.h
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@@ -9,6 +9,17 @@
#include <asm/ist.h>
#include <video/edid.h>
/* setup data types */
#define SETUP_NONE 0
/* 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;
@@ -46,6 +57,9 @@ struct setup_header {
__u32 cmdline_size;
__u32 hardware_subarch;
__u64 hardware_subarch_data;
__u32 payload_offset;
__u32 payload_length;
__u64 setup_data;
} __attribute__((packed));
struct sys_desc_table {