[x86] remove uses of magic macros for boot_params access
Instead of using magic macros for boot_params access, simply use the
boot_params structure.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c
index 8561f62..a7eee0a 100644
--- a/arch/x86/kernel/head64.c
+++ b/arch/x86/kernel/head64.c
@@ -14,7 +14,6 @@
#include <asm/processor.h>
#include <asm/proto.h>
#include <asm/smp.h>
-#include <asm/bootsetup.h>
#include <asm/setup.h>
#include <asm/desc.h>
#include <asm/pgtable.h>
@@ -36,26 +35,15 @@
(unsigned long) __bss_stop - (unsigned long) __bss_start);
}
-#define NEW_CL_POINTER 0x228 /* Relative to real mode data */
-#define OLD_CL_MAGIC_ADDR 0x20
-#define OLD_CL_MAGIC 0xA33F
-#define OLD_CL_OFFSET 0x22
-
static void __init copy_bootdata(char *real_mode_data)
{
- unsigned long new_data;
char * command_line;
- memcpy(x86_boot_params, real_mode_data, BOOT_PARAM_SIZE);
- new_data = *(u32 *) (x86_boot_params + NEW_CL_POINTER);
- if (!new_data) {
- if (OLD_CL_MAGIC != *(u16 *)(real_mode_data + OLD_CL_MAGIC_ADDR)) {
- return;
- }
- new_data = __pa(real_mode_data) + *(u16 *)(real_mode_data + OLD_CL_OFFSET);
+ memcpy(&boot_params, real_mode_data, sizeof boot_params);
+ if (boot_params.hdr.cmd_line_ptr) {
+ command_line = __va(boot_params.hdr.cmd_line_ptr);
+ memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
}
- command_line = __va(new_data);
- memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
}
void __init x86_64_start_kernel(char * real_mode_data)