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/*
* Copyright (c) 2004 Christian Limpach.
* Copyright (c) 2004-2006,2008 Kip Macy
* Copyright (c) 2013 Roger Pau Monné <roger.pau@citrix.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/reboot.h>
#include <sys/systm.h>
#include <sys/lock.h>
#include <sys/rwlock.h>
#include <vm/vm.h>
#include <vm/vm_extern.h>
#include <vm/vm_kern.h>
#include <vm/vm_page.h>
#include <vm/vm_map.h>
#include <vm/vm_object.h>
#include <vm/vm_pager.h>
#include <vm/vm_param.h>
#include <xen/xen-os.h>
#include <xen/hypervisor.h>
/* Native initial function */
extern u_int64_t hammer_time(u_int64_t, u_int64_t);
/* Xen initial function */
uint64_t hammer_time_xen(start_info_t *, uint64_t);
/*
* First function called by the Xen PVH boot sequence.
*
* Set some Xen global variables and prepare the environment so it is
* as similar as possible to what native FreeBSD init function expects.
*/
uint64_t
hammer_time_xen(start_info_t *si, uint64_t xenstack)
{
uint64_t physfree;
uint64_t *PT4 = (u_int64_t *)xenstack;
uint64_t *PT3 = (u_int64_t *)(xenstack + PAGE_SIZE);
uint64_t *PT2 = (u_int64_t *)(xenstack + 2 * PAGE_SIZE);
int i;
xen_domain_type = XEN_PV_DOMAIN;
vm_guest = VM_GUEST_XEN;
if ((si == NULL) || (xenstack == 0)) {
HYPERVISOR_shutdown(SHUTDOWN_crash);
}
/* We use 3 pages of xen stack for the boot pagetables */
physfree = xenstack + 3 * PAGE_SIZE - KERNBASE;
/* Setup Xen global variables */
HYPERVISOR_start_info = si;
HYPERVISOR_shared_info =
(shared_info_t *)(si->shared_info + KERNBASE);
/*
* Setup some misc global variables for Xen devices
*
* XXX: Devices that need these specific variables should
* be rewritten to fetch this info by themselves from the
* start_info page.
*/
xen_store = (struct xenstore_domain_interface *)
(ptoa(si->store_mfn) + KERNBASE);
/*
* Use the stack Xen gives us to build the page tables
* as native FreeBSD expects to find them (created
* by the boot trampoline).
*/
for (i = 0; i < (PAGE_SIZE / sizeof(uint64_t)); i++) {
/* Each slot of the level 4 pages points to the same level 3 page */
PT4[i] = ((uint64_t)&PT3[0]) - KERNBASE;
PT4[i] |= PG_V | PG_RW | PG_U;
/* Each slot of the level 3 pages points to the same level 2 page */
PT3[i] = ((uint64_t)&PT2[0]) - KERNBASE;
PT3[i] |= PG_V | PG_RW | PG_U;
/* The level 2 page slots are mapped with 2MB pages for 1GB. */
PT2[i] = i * (2 * 1024 * 1024);
PT2[i] |= PG_V | PG_RW | PG_PS | PG_U;
}
load_cr3(((uint64_t)&PT4[0]) - KERNBASE);
/* Now we can jump into the native init function */
return (hammer_time(0, physfree));
}
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