66 lines
1.9 KiB
C
66 lines
1.9 KiB
C
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/******************************************************************************
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* arch/ia64/xen/xen_pv_ops.c
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*
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* Copyright (c) 2008 Isaku Yamahata <yamahata at valinux co jp>
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* VA Linux Systems Japan K.K.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <linux/console.h>
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#include <linux/irq.h>
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#include <linux/kernel.h>
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#include <linux/pm.h>
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#include <asm/xen/hypervisor.h>
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#include <asm/xen/xencomm.h>
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#include <asm/xen/privop.h>
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/***************************************************************************
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* general info
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*/
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static struct pv_info xen_info __initdata = {
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.kernel_rpl = 2, /* or 1: determin at runtime */
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.paravirt_enabled = 1,
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.name = "Xen/ia64",
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};
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#define IA64_RSC_PL_SHIFT 2
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#define IA64_RSC_PL_BIT_SIZE 2
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#define IA64_RSC_PL_MASK \
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(((1UL << IA64_RSC_PL_BIT_SIZE) - 1) << IA64_RSC_PL_SHIFT)
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static void __init
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xen_info_init(void)
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{
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/* Xenified Linux/ia64 may run on pl = 1 or 2.
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* determin at run time. */
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unsigned long rsc = ia64_getreg(_IA64_REG_AR_RSC);
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unsigned int rpl = (rsc & IA64_RSC_PL_MASK) >> IA64_RSC_PL_SHIFT;
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xen_info.kernel_rpl = rpl;
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}
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/***************************************************************************
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* pv_ops initialization
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*/
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void __init
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xen_setup_pv_ops(void)
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{
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xen_info_init();
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pv_info = xen_info;
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}
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