Subversion Repositories HelenOS

#
# Copyright (c) 2006 Martin Decky
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# - Redistributions of source code must retain the above copyright
#   notice, this list of conditions and the following disclaimer.
# - 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.
# - The name of the author may not be used to endorse or promote products
#   derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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 <arch/mm/page.h>
#include <arch/hypercall.h>

#define ELFNOTE(name, type, desctype, descval) \
    .section .note.name; \
    .align 4; \
    .long 2f - 1f; \
    .long 4f - 3f; \
    .long type; \
    1:.asciz #name; \
    2:.align 4; \
    3:desctype descval; \
    4:.align 4

ELFNOTE(Xen, XEN_ELFNOTE_GUEST_OS,          .asciz, "HelenOS")
ELFNOTE(Xen, XEN_ELFNOTE_GUEST_VERSION,     .asciz, RELEASE)
ELFNOTE(Xen, XEN_ELFNOTE_XEN_VERSION,       .asciz, "xen-3.0")
ELFNOTE(Xen, XEN_ELFNOTE_VIRT_BASE,         .long,  PA2KA(BOOT_OFFSET))
ELFNOTE(Xen, XEN_ELFNOTE_PADDR_OFFSET,      .long,  0)
ELFNOTE(Xen, XEN_ELFNOTE_ENTRY,             .long,  kernel_image_start)
ELFNOTE(Xen, XEN_ELFNOTE_HYPERCALL_PAGE,    .long,  hypercall_page)
ELFNOTE(Xen, XEN_ELFNOTE_FEATURES,          .asciz, "auto_translated_physmap|supervisor_mode_kernel")
ELFNOTE(Xen, XEN_ELFNOTE_PAE_MODE,          .asciz, "no")
ELFNOTE(Xen, XEN_ELFNOTE_LOADER,            .asciz, "generic")

.text

.code32
.align 4
.global kernel_image_start
    
kernel_image_start:
    # copy start_info (esi initialized by Xen)
    
    movl $start_info, %edi
    movl $START_INFO_SIZE >> 2, %ecx
    cld
    rep movsb
    
    # switch to temporal kernel stack
    
    movl $kernel_stack, %esp
    
    call arch_pre_main
    call main_bsp                               # never returns

    cli
    hlt

kernel_stack_bottom:
    .space TEMP_STACK_SIZE
kernel_stack:

.section K_TEXT_START, "aw", @progbits
.global hypercall_page
.org 0
hypercall_page:
    .space PAGE_SIZE

.global shared_info
.org 0x1000
shared_info:
    .space PAGE_SIZE

.global console_page
.org 0x2000
console_page:
    .space PAGE_SIZE

# Xen 3.0.3 ELF loader is somehow buggy
# thus this workaround
.global dummy_fill
dummy_fill:
    .space (1024 * 1024)