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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/ia64/xen/xensetup.S
10817 views
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/*

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 * Support routines for Xen

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 *

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 * Copyright (C) 2005 Dan Magenheimer <[email protected]>

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 */

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#include <asm/processor.h>

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#include <asm/asmmacro.h>

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#include <asm/pgtable.h>

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#include <asm/system.h>

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#include <asm/paravirt.h>

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#include <asm/xen/privop.h>

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#include <linux/elfnote.h>

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#include <linux/init.h>

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#include <xen/interface/elfnote.h>

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	.section .data..read_mostly

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	.align 8

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	.global xen_domain_type

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xen_domain_type:

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	data4 XEN_NATIVE_ASM

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	.previous

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	__INIT

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ENTRY(startup_xen)

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	// Calculate load offset.

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	// The constant, LOAD_OFFSET, can't be used because the boot

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	// loader doesn't always load to the LMA specified by the vmlinux.lds.

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	mov r9=ip	// must be the first instruction to make sure

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			// that r9 = the physical address of startup_xen.

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			// Usually r9 = startup_xen - LOAD_OFFSET

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	movl r8=startup_xen

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	;;

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	sub r9=r9,r8	// Usually r9 = -LOAD_OFFSET.

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	mov r10=PARAVIRT_HYPERVISOR_TYPE_XEN

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	movl r11=_start

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	;;

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	add r11=r11,r9

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	movl r8=hypervisor_type

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	;;

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	add r8=r8,r9

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	mov b0=r11

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	;;

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	st8 [r8]=r10

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	br.cond.sptk.many b0

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	;;

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END(startup_xen)

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	ELFNOTE(Xen, XEN_ELFNOTE_GUEST_OS,	.asciz "linux")

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	ELFNOTE(Xen, XEN_ELFNOTE_GUEST_VERSION,	.asciz "2.6")

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	ELFNOTE(Xen, XEN_ELFNOTE_XEN_VERSION,	.asciz "xen-3.0")

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	ELFNOTE(Xen, XEN_ELFNOTE_ENTRY,		data8.ua startup_xen - LOAD_OFFSET)

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#define isBP	p3	// are we the Bootstrap Processor?

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GLOBAL_ENTRY(xen_setup_hook)

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	mov r8=XEN_PV_DOMAIN_ASM

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(isBP)	movl r9=xen_domain_type;;

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(isBP)	st4 [r9]=r8

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	movl r10=xen_ivt;;

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	mov cr.iva=r10

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	/* Set xsi base.  */

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#define FW_HYPERCALL_SET_SHARED_INFO_VA			0x600

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(isBP)	mov r2=FW_HYPERCALL_SET_SHARED_INFO_VA

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(isBP)	movl r28=XSI_BASE;;

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(isBP)	break 0x1000;;

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	/* setup pv_ops */

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(isBP)	mov r4=rp

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	;;

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(isBP)	br.call.sptk.many rp=xen_setup_pv_ops

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	;;

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(isBP)	mov rp=r4

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	;;

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	br.ret.sptk.many rp

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	;;

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END(xen_setup_hook)

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