arch/x86/xen/xen-head.S

   1 /* Xen-specific pieces of head.S, intended to be included in the right
   2         place in head.S */
   3
   4 #ifdef CONFIG_XEN
   5
   6 #include <linux/elfnote.h>
   7 #include <linux/init.h>
   8
   9 #include <asm/boot.h>
  10 #include <asm/asm.h>
  11 #include <asm/page_types.h>
  12
  13 #include <xen/interface/elfnote.h>
  14 #include <asm/xen/interface.h>
  15
  16         __INIT
  17 ENTRY(startup_xen)
  18         cld
  19 #ifdef CONFIG_X86_32
  20         mov %esi,xen_start_info
  21         mov $init_thread_union+THREAD_SIZE,%esp
  22 #else
  23         mov %rsi,xen_start_info
  24         mov $init_thread_union+THREAD_SIZE,%rsp
  25 #endif
  26         jmp xen_start_kernel
  27
  28         __FINIT
  29
  30 .pushsection .text
  31         .align PAGE_SIZE
  32 ENTRY(hypercall_page)
  33         .skip PAGE_SIZE
  34 .popsection
  35
  36         ELFNOTE(Xen, XEN_ELFNOTE_GUEST_OS,       .asciz "linux")
  37         ELFNOTE(Xen, XEN_ELFNOTE_GUEST_VERSION,  .asciz "2.6")
  38         ELFNOTE(Xen, XEN_ELFNOTE_XEN_VERSION,    .asciz "xen-3.0")
  39 #ifdef CONFIG_X86_32
  40         ELFNOTE(Xen, XEN_ELFNOTE_VIRT_BASE,      _ASM_PTR __PAGE_OFFSET)
  41 #else
  42         ELFNOTE(Xen, XEN_ELFNOTE_VIRT_BASE,      _ASM_PTR __START_KERNEL_map)
  43 #endif
  44         ELFNOTE(Xen, XEN_ELFNOTE_ENTRY,          _ASM_PTR startup_xen)
  45         ELFNOTE(Xen, XEN_ELFNOTE_HYPERCALL_PAGE, _ASM_PTR hypercall_page)
  46         ELFNOTE(Xen, XEN_ELFNOTE_FEATURES,       .asciz "!writable_page_tables|pae_pgdir_above_4gb")
  47         ELFNOTE(Xen, XEN_ELFNOTE_PAE_MODE,       .asciz "yes")
  48         ELFNOTE(Xen, XEN_ELFNOTE_LOADER,         .asciz "generic")
  49         ELFNOTE(Xen, XEN_ELFNOTE_L1_MFN_VALID,
  50                 .quad _PAGE_PRESENT; .quad _PAGE_PRESENT)
  51         ELFNOTE(Xen, XEN_ELFNOTE_SUSPEND_CANCEL, .long 1)
  52         ELFNOTE(Xen, XEN_ELFNOTE_HV_START_LOW,   _ASM_PTR __HYPERVISOR_VIRT_START)
  53         ELFNOTE(Xen, XEN_ELFNOTE_PADDR_OFFSET,   _ASM_PTR 0)
  54
  55 #endif /*CONFIG_XEN */