mirror of
https://github.com/torvalds/linux.git
synced 2024-12-04 18:13:04 +00:00
080104cd0f
This patch enables elf note based xen startup for IA-64, which gives the kernel an early hint for running on xen like x86 case. In order to avoid the multi entry point, presumably extending booting protocol(i.e. extending struct ia64_boot_param) would be necessary. It probably means that elilo also needs modification. Signed-off-by: Qing He <qing.he@intel.com> Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
84 lines
1.8 KiB
ArmAsm
84 lines
1.8 KiB
ArmAsm
/*
|
|
* Support routines for Xen
|
|
*
|
|
* Copyright (C) 2005 Dan Magenheimer <dan.magenheimer@hp.com>
|
|
*/
|
|
|
|
#include <asm/processor.h>
|
|
#include <asm/asmmacro.h>
|
|
#include <asm/pgtable.h>
|
|
#include <asm/system.h>
|
|
#include <asm/paravirt.h>
|
|
#include <asm/xen/privop.h>
|
|
#include <linux/elfnote.h>
|
|
#include <linux/init.h>
|
|
#include <xen/interface/elfnote.h>
|
|
|
|
.section .data.read_mostly
|
|
.align 8
|
|
.global xen_domain_type
|
|
xen_domain_type:
|
|
data4 XEN_NATIVE_ASM
|
|
.previous
|
|
|
|
__INIT
|
|
ENTRY(startup_xen)
|
|
// Calculate load offset.
|
|
// The constant, LOAD_OFFSET, can't be used because the boot
|
|
// loader doesn't always load to the LMA specified by the vmlinux.lds.
|
|
mov r9=ip // must be the first instruction to make sure
|
|
// that r9 = the physical address of startup_xen.
|
|
// Usually r9 = startup_xen - LOAD_OFFSET
|
|
movl r8=startup_xen
|
|
;;
|
|
sub r9=r9,r8 // Usually r9 = -LOAD_OFFSET.
|
|
|
|
mov r10=PARAVIRT_HYPERVISOR_TYPE_XEN
|
|
movl r11=_start
|
|
;;
|
|
add r11=r11,r9
|
|
movl r8=hypervisor_type
|
|
;;
|
|
add r8=r8,r9
|
|
mov b0=r11
|
|
;;
|
|
st8 [r8]=r10
|
|
br.cond.sptk.many b0
|
|
;;
|
|
END(startup_xen)
|
|
|
|
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")
|
|
ELFNOTE(Xen, XEN_ELFNOTE_ENTRY, data8.ua startup_xen - LOAD_OFFSET)
|
|
|
|
#define isBP p3 // are we the Bootstrap Processor?
|
|
|
|
.text
|
|
|
|
GLOBAL_ENTRY(xen_setup_hook)
|
|
mov r8=XEN_PV_DOMAIN_ASM
|
|
(isBP) movl r9=xen_domain_type;;
|
|
(isBP) st4 [r9]=r8
|
|
movl r10=xen_ivt;;
|
|
|
|
mov cr.iva=r10
|
|
|
|
/* Set xsi base. */
|
|
#define FW_HYPERCALL_SET_SHARED_INFO_VA 0x600
|
|
(isBP) mov r2=FW_HYPERCALL_SET_SHARED_INFO_VA
|
|
(isBP) movl r28=XSI_BASE;;
|
|
(isBP) break 0x1000;;
|
|
|
|
/* setup pv_ops */
|
|
(isBP) mov r4=rp
|
|
;;
|
|
(isBP) br.call.sptk.many rp=xen_setup_pv_ops
|
|
;;
|
|
(isBP) mov rp=r4
|
|
;;
|
|
|
|
br.ret.sptk.many rp
|
|
;;
|
|
END(xen_setup_hook)
|