mirror of
https://github.com/edk2-porting/linux-next.git
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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
/*
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* Support routines for Xen
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*
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* Copyright (C) 2005 Dan Magenheimer <dan.magenheimer@hp.com>
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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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.text
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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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