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+/*-
+ * Copyright (c) 2003 Peter Wemm <peter@FreeBSD.org>
+ * Copyright (c) 2013 Roger Pau Monne <royger@FreeBSD.org>
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+#include <machine/asmacros.h>
+#include <machine/psl.h>
+#include <machine/pmap.h>
+#include <machine/specialreg.h>
+
+#include <xen/xen-os.h>
+#define __ASSEMBLY__
+#include <xen/interface/elfnote.h>
+
+#include "assym.s"
+
+.section __xen_guest
+ ELFNOTE(Xen, XEN_ELFNOTE_GUEST_OS, .asciz, "FreeBSD")
+ ELFNOTE(Xen, XEN_ELFNOTE_GUEST_VERSION, .asciz, __XSTRING(__FreeBSD_version))
+ ELFNOTE(Xen, XEN_ELFNOTE_XEN_VERSION, .asciz, "xen-3.0")
+ ELFNOTE(Xen, XEN_ELFNOTE_VIRT_BASE, .quad, KERNBASE)
+ ELFNOTE(Xen, XEN_ELFNOTE_PADDR_OFFSET, .quad, KERNBASE) /* Xen honours elf->p_paddr; compensate for this */
+ ELFNOTE(Xen, XEN_ELFNOTE_ENTRY, .quad, xen_start)
+ ELFNOTE(Xen, XEN_ELFNOTE_HYPERCALL_PAGE, .quad, hypercall_page)
+ ELFNOTE(Xen, XEN_ELFNOTE_HV_START_LOW, .quad, HYPERVISOR_VIRT_START)
+ ELFNOTE(Xen, XEN_ELFNOTE_FEATURES, .asciz, "writable_descriptor_tables|auto_translated_physmap|supervisor_mode_kernel|hvm_callback_vector")
+ ELFNOTE(Xen, XEN_ELFNOTE_PAE_MODE, .asciz, "yes")
+ ELFNOTE(Xen, XEN_ELFNOTE_L1_MFN_VALID, .long, PG_V, PG_V)
+ ELFNOTE(Xen, XEN_ELFNOTE_LOADER, .asciz, "generic")
+ ELFNOTE(Xen, XEN_ELFNOTE_SUSPEND_CANCEL, .long, 0)
+ ELFNOTE(Xen, XEN_ELFNOTE_BSD_SYMTAB, .asciz, "yes")
+
+ .text
+.p2align PAGE_SHIFT, 0x90 /* Hypercall_page needs to be PAGE aligned */
+
+NON_GPROF_ENTRY(hypercall_page)
+ .skip 0x1000, 0x90 /* Fill with "nop"s */
+
+NON_GPROF_ENTRY(xen_start)
+ /* Don't trust what the loader gives for rflags. */
+ pushq $PSL_KERNEL
+ popfq
+
+ /* Parameters for the xen init function */
+ movq %rsi, %rdi /* shared_info (arg 1) */
+ movq %rsp, %rsi /* xenstack (arg 2) */
+
+ /* Use our own stack */
+ movq $bootstack,%rsp
+ xorl %ebp, %ebp
+
+ /* u_int64_t hammer_time_xen(start_info_t *si, u_int64_t xenstack); */
+ call hammer_time_xen
+ movq %rax, %rsp /* set up kstack for mi_startup() */
+ call mi_startup /* autoconfiguration, mountroot etc */
+
+ /* NOTREACHED */
+0: hlt
+ jmp 0b