LXR linux/arch/ia64/xen/xensetup.S

   1/*
   2 * Support routines for Xen
   3 *
   4 * Copyright (C) 2005 Dan Magenheimer <dan.magenheimer@hp.com>
   5 */
   6
   7#include <asm/processor.h>
   8#include <asm/asmmacro.h>
   9#include <asm/pgtable.h>
  10#include <asm/paravirt.h>
  11#include <asm/xen/privop.h>
  12#include <linux/elfnote.h>
  13#include <linux/init.h>
  14#include <xen/interface/elfnote.h>
  15
  16        .section .data..read_mostly
  17        .align 8
  18        .global xen_domain_type
  19xen_domain_type:
  20        data4 XEN_NATIVE_ASM
  21        .previous
  22
  23        __INIT
  24ENTRY(startup_xen)
  25        // Calculate load offset.
  26        // The constant, LOAD_OFFSET, can't be used because the boot
  27        // loader doesn't always load to the LMA specified by the vmlinux.lds.
  28        mov r9=ip       // must be the first instruction to make sure
  29                        // that r9 = the physical address of startup_xen.
  30                        // Usually r9 = startup_xen - LOAD_OFFSET
  31        movl r8=startup_xen
  32        ;;
  33        sub r9=r9,r8    // Usually r9 = -LOAD_OFFSET.
  34
  35        mov r10=PARAVIRT_HYPERVISOR_TYPE_XEN
  36        movl r11=_start
  37        ;;
  38        add r11=r11,r9
  39        movl r8=hypervisor_type
  40        ;;
  41        add r8=r8,r9
  42        mov b0=r11
  43        ;;
  44        st8 [r8]=r10
  45        br.cond.sptk.many b0
  46        ;;
  47END(startup_xen)
  48
  49        ELFNOTE(Xen, XEN_ELFNOTE_GUEST_OS,      .asciz "linux")
  50        ELFNOTE(Xen, XEN_ELFNOTE_GUEST_VERSION, .asciz "2.6")
  51        ELFNOTE(Xen, XEN_ELFNOTE_XEN_VERSION,   .asciz "xen-3.0")
  52        ELFNOTE(Xen, XEN_ELFNOTE_ENTRY,         data8.ua startup_xen - LOAD_OFFSET)
  53
  54#define isBP    p3      // are we the Bootstrap Processor?
  55
  56GLOBAL_ENTRY(xen_setup_hook)
  57        mov r8=XEN_PV_DOMAIN_ASM
  58(isBP)  movl r9=xen_domain_type;;
  59(isBP)  st4 [r9]=r8
  60        movl r10=xen_ivt;;
  61
  62        mov cr.iva=r10
  63
  64        /* Set xsi base.  */
  65#define FW_HYPERCALL_SET_SHARED_INFO_VA                 0x600
  66(isBP)  mov r2=FW_HYPERCALL_SET_SHARED_INFO_VA
  67(isBP)  movl r28=XSI_BASE;;
  68(isBP)  break 0x1000;;
  69
  70        /* setup pv_ops */
  71(isBP)  mov r4=rp
  72        ;;
  73(isBP)  br.call.sptk.many rp=xen_setup_pv_ops
  74        ;;
  75(isBP)  mov rp=r4
  76        ;;
  77
  78        br.ret.sptk.many rp
  79        ;;
  80END(xen_setup_hook)
  81