diff options
Diffstat (limited to 'old/xenolinux-2.4.16-sparse/arch/xeno/kernel/head.S')
| -rw-r--r-- | old/xenolinux-2.4.16-sparse/arch/xeno/kernel/head.S | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/old/xenolinux-2.4.16-sparse/arch/xeno/kernel/head.S b/old/xenolinux-2.4.16-sparse/arch/xeno/kernel/head.S new file mode 100644 index 0000000000..86a82b13dc --- /dev/null +++ b/old/xenolinux-2.4.16-sparse/arch/xeno/kernel/head.S @@ -0,0 +1,67 @@ + +.text +#include <linux/config.h> +#include <linux/threads.h> +#include <linux/linkage.h> +#include <asm/segment.h> +#include <asm/page.h> +#include <asm/pgtable.h> +#include <asm/desc.h> + +/* Offsets in start_info structure */ +#define SHARED_INFO 4 +#define MOD_START 12 +#define MOD_LEN 16 + +startup_32: + cld + + lss stack_start,%esp + + /* Copy initrd somewhere safe before it's clobbered by BSS. */ + mov MOD_LEN(%esi),%ecx + shr $2,%ecx + jz 2f /* bail from copy loop if no initrd */ + mov $SYMBOL_NAME(_end),%edi + add MOD_LEN(%esi),%edi + mov MOD_START(%esi),%eax + add MOD_LEN(%esi),%eax +1: sub $4,%eax + sub $4,%edi + mov (%eax),%ebx + mov %ebx,(%edi) + loop 1b + mov %edi,MOD_START(%esi) + + /* Clear BSS first so that there are no surprises... */ +2: xorl %eax,%eax + movl $SYMBOL_NAME(__bss_start),%edi + movl $SYMBOL_NAME(_end),%ecx + subl %edi,%ecx + rep stosb + + /* Copy the necessary stuff from start_info structure. */ + /* We need to copy shared_info early, so that sti/cli work */ + mov SHARED_INFO(%esi),%eax + mov %eax,SYMBOL_NAME(HYPERVISOR_shared_info) + mov $SYMBOL_NAME(start_info_union),%edi + mov $128,%ecx + rep movsl + + jmp SYMBOL_NAME(start_kernel) + +ENTRY(stack_start) + .long SYMBOL_NAME(init_task_union)+8192, __KERNEL_DS + +.org 0x1000 +ENTRY(empty_zero_page) + +.org 0x2000 +ENTRY(cpu0_pte_quicklist) + +.org 0x2400 +ENTRY(cpu0_pgd_quicklist) + +.org 0x2800 +ENTRY(stext) +ENTRY(_stext) |