Add new ports: i386-xen and x86_64-xen. This allows running GRUB in

XEN PV environment and load kernels.
2013-11-09 21:29:11 +01:00 · 2013-11-09 21:29:11 +01:00 · 9612ebc00e
commit 9612ebc00e
parent 1a46a3a4b3
59 changed files with 4167 additions and 259 deletions
--- a/grub-core/lib/i386/xen/relocator.S
+++ b/grub-core/lib/i386/xen/relocator.S
@ -0,0 +1,146 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2013  Free Software Foundation, Inc.
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/symbol.h>
+#include <grub/xen.h>
+
+	.p2align	4	/* force 16-byte alignment */
+
+VARIABLE(grub_relocator_xen_remap_start)
+LOCAL(base):
+	/* mov imm32, %ebx */
+	.byte	0xbb
+VARIABLE(grub_relocator_xen_remapper_virt)
+	.long	0
+
+	/* mov imm32, %ecx */
+	.byte	0xb9
+VARIABLE(grub_relocator_xen_remapper_map)
+	.long	0
+
+	/* mov imm32, %edx */
+	.byte	0xba
+VARIABLE(grub_relocator_xen_remapper_map_high)
+	.long	0
+
+	movl    $2, %esi
+	movl    $__HYPERVISOR_update_va_mapping, %eax
+	int     $0x82
+
+	addl   $(LOCAL(cont) - LOCAL(base)), %ebx
+
+	jmp *%ebx
+
+LOCAL(cont):
+
+	/* mov imm32, %ecx */
+	.byte	0xb9
+VARIABLE(grub_relocator_xen_paging_size)
+	.long	0
+
+	/* mov imm32, %ebx */
+	.byte	0xbb
+VARIABLE(grub_relocator_xen_paging_start)
+	.long	0
+
+	/* mov imm32, %eax */
+	.byte	0xb8
+VARIABLE(grub_relocator_xen_mfn_list)
+	.long	0
+
+	movl	%eax, %edi
+1:	
+	movl    %ecx, %ebp
+	movl    0(%edi), %ecx
+	movl    %ecx, %edx
+	shll    $12,  %ecx
+	shrl    $20,  %edx
+	orl     $5, %ecx
+	movl    $2, %esi
+	movl    $__HYPERVISOR_update_va_mapping, %eax
+	int     $0x82
+
+	movl    %ebp, %ecx
+	addl    $4, %edi
+	addl    $4096, %ebx
+
+	loop 1b
+
+	/* mov imm32, %ebx */
+	.byte	0xbb
+VARIABLE(grub_relocator_xen_mmu_op_addr)
+	.long  0
+	movl   $3, %ecx
+	movl   $0, %edx
+	movl   $0x7FF0, %esi
+	movl   $__HYPERVISOR_mmuext_op, %eax
+	int     $0x82
+
+	/* mov imm32, %eax */
+	.byte	0xb8
+VARIABLE(grub_relocator_xen_remap_continue)
+	.long	0
+
+	jmp *%eax
+
+VARIABLE(grub_relocator_xen_mmu_op)
+	.space 256
+
+VARIABLE(grub_relocator_xen_remap_end)
+
+
+VARIABLE(grub_relocator_xen_start)
+	/* mov imm32, %eax */
+	.byte	0xb8
+VARIABLE(grub_relocator_xen_remapper_virt2)
+	.long	0
+
+	movl    %eax, %edi
+
+	xorl    %ecx, %ecx
+	xorl    %edx, %edx
+
+	movl    $2, %esi
+	movl    $__HYPERVISOR_update_va_mapping, %eax
+	int     $0x82
+
+
+	/* mov imm32, %eax */
+	.byte	0xb8
+VARIABLE(grub_relocator_xen_stack)
+	.long	0
+
+	movl	%eax, %esp
+
+	/* mov imm32, %eax */
+	.byte	0xb8
+VARIABLE(grub_relocator_xen_start_info)
+	.long	0
+
+	movl	%eax, %esi
+
+	cld
+
+	/* mov imm32, %eax */
+	.byte	0xb8
+VARIABLE(grub_relocator_xen_entry_point)
+	.long	0
+
+	jmp *%eax
+
+VARIABLE(grub_relocator_xen_end)