root/arch/x86/xen/xen-head.S

/* Xen-specific pieces of head.S, intended to be included in the right
        place in head.S */

#ifdef CONFIG_XEN

#include <linux/elfnote.h>
#include <linux/init.h>

#include <asm/boot.h>
#include <asm/asm.h>
#include <asm/page.h>

#include <xen/interface/elfnote.h>
#include <asm/xen/interface.h>

        __INIT
ENTRY(startup_xen)
        cld
#ifdef CONFIG_X86_32
        mov %esi,xen_start_info
        mov $init_thread_union+THREAD_SIZE,%esp
#else
        mov %rsi,xen_start_info
        mov $init_thread_union+THREAD_SIZE,%rsp
#endif
        jmp xen_start_kernel

        __FINIT

.pushsection .text
        .align PAGE_SIZE_asm
ENTRY(hypercall_page)
        .skip PAGE_SIZE_asm
.popsection

        ELFNOTE(Xen, XEN_ELFNOTE_GUEST_OS,       .asciz "linux")
        ELFNOTE(Xen, XEN_ELFNOTE_GUEST_VERSION,  .asciz "2.6")
        ELFNOTE(Xen, XEN_ELFNOTE_XEN_VERSION,    .asciz "xen-3.0")
#ifdef CONFIG_X86_32
        ELFNOTE(Xen, XEN_ELFNOTE_VIRT_BASE,      _ASM_PTR __PAGE_OFFSET)
#else
        ELFNOTE(Xen, XEN_ELFNOTE_VIRT_BASE,      _ASM_PTR __START_KERNEL_map)
#endif
        ELFNOTE(Xen, XEN_ELFNOTE_ENTRY,          _ASM_PTR startup_xen)
        ELFNOTE(Xen, XEN_ELFNOTE_HYPERCALL_PAGE, _ASM_PTR hypercall_page)
        ELFNOTE(Xen, XEN_ELFNOTE_FEATURES,       .asciz "!writable_page_tables|pae_pgdir_above_4gb")
        ELFNOTE(Xen, XEN_ELFNOTE_PAE_MODE,       .asciz "yes")
        ELFNOTE(Xen, XEN_ELFNOTE_LOADER,         .asciz "generic")
        ELFNOTE(Xen, XEN_ELFNOTE_L1_MFN_VALID,
                .quad _PAGE_PRESENT; .quad _PAGE_PRESENT)
        ELFNOTE(Xen, XEN_ELFNOTE_SUSPEND_CANCEL, .long 1)
        ELFNOTE(Xen, XEN_ELFNOTE_HV_START_LOW,   _ASM_PTR __HYPERVISOR_VIRT_START)
        ELFNOTE(Xen, XEN_ELFNOTE_PADDR_OFFSET,   _ASM_PTR 0)

#endif /*CONFIG_XEN */