@@ -1,6 +1,7 @@
obj-bin-y += head.o
-RELOC_DEPS = $(BASEDIR)/include/asm-x86/config.h $(BASEDIR)/include/xen/multiboot.h
+RELOC_DEPS = $(BASEDIR)/include/asm-x86/config.h $(BASEDIR)/include/xen/multiboot.h \
+ $(BASEDIR)/include/xen/multiboot2.h
head.o: reloc.S
@@ -1,5 +1,6 @@
#include <xen/config.h>
#include <xen/multiboot.h>
+#include <xen/multiboot2.h>
#include <public/xen.h>
#include <asm/asm_defns.h>
#include <asm/desc.h>
@@ -19,6 +20,28 @@
#define BOOT_PSEUDORM_CS 0x0020
#define BOOT_PSEUDORM_DS 0x0028
+#define MB2_HT(name) (MULTIBOOT2_HEADER_TAG_##name)
+#define MB2_TT(name) (MULTIBOOT2_TAG_TYPE_##name)
+
+ .macro mb2ht_args arg:req, args:vararg
+ .long \arg
+ .ifnb \args
+ mb2ht_args \args
+ .endif
+ .endm
+
+ .macro mb2ht_init type:req, req:req, args:vararg
+ .align MULTIBOOT2_TAG_ALIGN
+.Lmb2ht_init_start\@:
+ .short \type
+ .short \req
+ .long .Lmb2ht_init_end\@ - .Lmb2ht_init_start\@
+ .ifnb \args
+ mb2ht_args \args
+ .endif
+.Lmb2ht_init_end\@:
+ .endm
+
ENTRY(start)
jmp __start
@@ -34,6 +57,42 @@ multiboot1_header_start: /*** MULTIBOOT1 HEADER ****/
.long -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS)
multiboot1_header_end:
+/*** MULTIBOOT2 HEADER ****/
+/* Some ideas are taken from grub-2.00/grub-core/tests/boot/kernel-i386.S file. */
+ .align MULTIBOOT2_HEADER_ALIGN
+
+multiboot2_header_start:
+ /* Magic number indicating a Multiboot2 header. */
+ .long MULTIBOOT2_HEADER_MAGIC
+ /* Architecture: i386. */
+ .long MULTIBOOT2_ARCHITECTURE_I386
+ /* Multiboot2 header length. */
+ .long .Lmultiboot2_header_end - multiboot2_header_start
+ /* Multiboot2 header checksum. */
+ .long -(MULTIBOOT2_HEADER_MAGIC + MULTIBOOT2_ARCHITECTURE_I386 + \
+ (.Lmultiboot2_header_end - multiboot2_header_start))
+
+ /* Multiboot2 information request tag. */
+ mb2ht_init MB2_HT(INFORMATION_REQUEST), MB2_HT(REQUIRED), \
+ MB2_TT(BASIC_MEMINFO), MB2_TT(MMAP)
+
+ /* Align modules at page boundry. */
+ mb2ht_init MB2_HT(MODULE_ALIGN), MB2_HT(REQUIRED)
+
+ /* Console flags tag. */
+ mb2ht_init MB2_HT(CONSOLE_FLAGS), MB2_HT(OPTIONAL), \
+ MULTIBOOT2_CONSOLE_FLAGS_EGA_TEXT_SUPPORTED
+
+ /* Framebuffer tag. */
+ mb2ht_init MB2_HT(FRAMEBUFFER), MB2_HT(OPTIONAL), \
+ 0, /* Number of the columns - no preference. */ \
+ 0, /* Number of the lines - no preference. */ \
+ 0 /* Number of bits per pixel - no preference. */
+
+ /* Multiboot2 header end tag. */
+ mb2ht_init MB2_HT(END), MB2_HT(REQUIRED)
+.Lmultiboot2_header_end:
+
.section .init.rodata, "a", @progbits
.align 4
@@ -82,10 +141,52 @@ __start:
mov %ecx,%es
mov %ecx,%ss
- /* Check for Multiboot bootloader */
+ /* Bootloaders may set multiboot{1,2}.mem_lower to a nonzero value. */
+ xor %edx,%edx
+
+ /* Check for Multiboot2 bootloader. */
+ cmp $MULTIBOOT2_BOOTLOADER_MAGIC,%eax
+ je .Lmultiboot2_proto
+
+ /* Check for Multiboot bootloader. */
cmp $MULTIBOOT_BOOTLOADER_MAGIC,%eax
jne not_multiboot
+ /* Get mem_lower from Multiboot information. */
+ testb $MBI_MEMLIMITS,MB_flags(%ebx)
+
+ /* Not available? BDA value will be fine. */
+ cmovnz MB_mem_lower(%ebx),%edx
+ jmp trampoline_setup
+
+.Lmultiboot2_proto:
+ /* Skip Multiboot2 information fixed part. */
+ lea (MB2_fixed_sizeof+MULTIBOOT2_TAG_ALIGN-1)(%ebx),%ecx
+ and $~(MULTIBOOT2_TAG_ALIGN-1),%ecx
+
+.Lmb2_tsize:
+ /* Check Multiboot2 information total size. */
+ mov %ecx,%edi
+ sub %ebx,%edi
+ cmp %edi,MB2_fixed_total_size(%ebx)
+ jbe trampoline_setup
+
+ /* Get mem_lower from Multiboot2 information. */
+ cmpl $MULTIBOOT2_TAG_TYPE_BASIC_MEMINFO,MB2_tag_type(%ecx)
+ cmove MB2_mem_lower(%ecx),%edx
+ je trampoline_setup
+
+ /* Is it the end of Multiboot2 information? */
+ cmpl $MULTIBOOT2_TAG_TYPE_END,MB2_tag_type(%ecx)
+ je trampoline_setup
+
+ /* Go to next Multiboot2 information tag. */
+ add MB2_tag_size(%ecx),%ecx
+ add $(MULTIBOOT2_TAG_ALIGN-1),%ecx
+ and $~(MULTIBOOT2_TAG_ALIGN-1),%ecx
+ jmp .Lmb2_tsize
+
+trampoline_setup:
/* Set up trampoline segment 64k below EBDA */
movzwl 0x40e,%ecx /* EBDA segment */
cmp $0xa000,%ecx /* sanity check (high) */
@@ -100,9 +201,6 @@ __start:
* Compare the value in the BDA with the information from the
* multiboot structure (if available) and use the smallest.
*/
- testb $MBI_MEMLIMITS,(%ebx)
- jz 2f /* not available? BDA value will be fine */
- mov MB_mem_lower(%ebx),%edx
cmp $0x100,%edx /* is the multiboot value too small? */
jb 2f /* if so, do not use it */
shl $10-4,%edx
@@ -121,6 +219,7 @@ __start:
mov $sym_phys(cpu0_stack)+1024,%esp
push %ecx /* Boot trampoline address. */
push %ebx /* Multiboot information address. */
+ push %eax /* Multiboot magic. */
call reloc
mov %eax,sym_phys(multiboot_ptr)
@@ -5,15 +5,18 @@
* and modules. This is most easily done early with paging disabled.
*
* Copyright (c) 2009, Citrix Systems, Inc.
+ * Copyright (c) 2013-2016 Oracle and/or its affiliates. All rights reserved.
*
* Authors:
* Keir Fraser <keir@xen.org>
+ * Daniel Kiper <daniel.kiper@oracle.com>
*/
/*
* This entry point is entered from xen/arch/x86/boot/head.S with:
- * - 0x4(%esp) = MULTIBOOT_INFORMATION_ADDRESS,
- * - 0x8(%esp) = BOOT_TRAMPOLINE_ADDRESS.
+ * - 0x4(%esp) = MULTIBOOT_MAGIC,
+ * - 0x8(%esp) = MULTIBOOT_INFORMATION_ADDRESS,
+ * - 0xc(%esp) = BOOT_TRAMPOLINE_ADDRESS.
*/
asm (
" .text \n"
@@ -23,7 +26,12 @@ asm (
);
typedef unsigned int u32;
+typedef unsigned long long u64;
+
#include "../../../include/xen/multiboot.h"
+#include "../../../include/xen/multiboot2.h"
+
+#define NULL ((void *)0)
#define __stdcall __attribute__((__stdcall__))
@@ -32,6 +40,9 @@ typedef unsigned int u32;
#define _p(val) ((void *)(unsigned long)(val))
+#define get_mb2_data(tag, type, member) (((multiboot2_tag_##type##_t *)(tag))->member)
+#define get_mb2_string(tag, type, member) ((u32)get_mb2_data(tag, type, member))
+
static u32 alloc;
static u32 alloc_mem(u32 bytes)
@@ -39,6 +50,12 @@ static u32 alloc_mem(u32 bytes)
return alloc -= ALIGN_UP(bytes, 16);
}
+static void zero_mem(u32 s, u32 bytes)
+{
+ while ( bytes-- )
+ *(char *)s++ = 0;
+}
+
static u32 copy_mem(u32 src, u32 bytes)
{
u32 dst, dst_ret;
@@ -65,13 +82,11 @@ static u32 copy_string(u32 src)
return copy_mem(src, p - src + 1);
}
-multiboot_info_t __stdcall *reloc(u32 mbi_in, u32 trampoline)
+static multiboot_info_t *mbi_reloc(u32 mbi_in)
{
int i;
multiboot_info_t *mbi_out;
- alloc = trampoline;
-
mbi_out = _p(copy_mem(mbi_in, sizeof(*mbi_out)));
if ( mbi_out->flags & MBI_CMDLINE )
@@ -108,3 +123,126 @@ multiboot_info_t __stdcall *reloc(u32 mbi_in, u32 trampoline)
return mbi_out;
}
+
+static multiboot_info_t *mbi2_reloc(u32 mbi_in)
+{
+ const multiboot2_fixed_t *mbi_fix = _p(mbi_in);
+ const multiboot2_memory_map_t *mmap_src;
+ const multiboot2_tag_t *tag;
+ module_t *mbi_out_mods = NULL;
+ memory_map_t *mmap_dst;
+ multiboot_info_t *mbi_out;
+ u32 ptr;
+ unsigned int i, mod_idx = 0;
+
+ ptr = alloc_mem(sizeof(*mbi_out));
+ mbi_out = _p(ptr);
+ zero_mem(ptr, sizeof(*mbi_out));
+
+ /* Skip Multiboot2 information fixed part. */
+ ptr = ALIGN_UP(mbi_in + sizeof(*mbi_fix), MULTIBOOT2_TAG_ALIGN);
+
+ /* Get the number of modules. */
+ for ( tag = _p(ptr); (u32)tag - mbi_in < mbi_fix->total_size;
+ tag = _p(ALIGN_UP((u32)tag + tag->size, MULTIBOOT2_TAG_ALIGN)) )
+ {
+ if ( tag->type == MULTIBOOT2_TAG_TYPE_MODULE )
+ ++mbi_out->mods_count;
+ else if ( tag->type == MULTIBOOT2_TAG_TYPE_END )
+ break;
+ }
+
+ if ( mbi_out->mods_count )
+ {
+ mbi_out->flags |= MBI_MODULES;
+ mbi_out->mods_addr = alloc_mem(mbi_out->mods_count * sizeof(*mbi_out_mods));
+ mbi_out_mods = _p(mbi_out->mods_addr);
+ }
+
+ /* Skip Multiboot2 information fixed part. */
+ ptr = ALIGN_UP(mbi_in + sizeof(*mbi_fix), MULTIBOOT2_TAG_ALIGN);
+
+ /* Put all needed data into mbi_out. */
+ for ( tag = _p(ptr); (u32)tag - mbi_in < mbi_fix->total_size;
+ tag = _p(ALIGN_UP((u32)tag + tag->size, MULTIBOOT2_TAG_ALIGN)) )
+ switch ( tag->type )
+ {
+ case MULTIBOOT2_TAG_TYPE_BOOT_LOADER_NAME:
+ mbi_out->flags |= MBI_LOADERNAME;
+ ptr = get_mb2_string(tag, string, string);
+ mbi_out->boot_loader_name = copy_string(ptr);
+ break;
+
+ case MULTIBOOT2_TAG_TYPE_CMDLINE:
+ mbi_out->flags |= MBI_CMDLINE;
+ ptr = get_mb2_string(tag, string, string);
+ mbi_out->cmdline = copy_string(ptr);
+ break;
+
+ case MULTIBOOT2_TAG_TYPE_BASIC_MEMINFO:
+ mbi_out->flags |= MBI_MEMLIMITS;
+ mbi_out->mem_lower = get_mb2_data(tag, basic_meminfo, mem_lower);
+ mbi_out->mem_upper = get_mb2_data(tag, basic_meminfo, mem_upper);
+ break;
+
+ case MULTIBOOT2_TAG_TYPE_MMAP:
+ if ( get_mb2_data(tag, mmap, entry_size) < sizeof(*mmap_src) )
+ break;
+
+ mbi_out->flags |= MBI_MEMMAP;
+ mbi_out->mmap_length = get_mb2_data(tag, mmap, size);
+ mbi_out->mmap_length -= sizeof(multiboot2_tag_mmap_t);
+ mbi_out->mmap_length /= get_mb2_data(tag, mmap, entry_size);
+ mbi_out->mmap_length *= sizeof(*mmap_dst);
+
+ mbi_out->mmap_addr = alloc_mem(mbi_out->mmap_length);
+
+ mmap_src = get_mb2_data(tag, mmap, entries);
+ mmap_dst = _p(mbi_out->mmap_addr);
+
+ for ( i = 0; i < mbi_out->mmap_length / sizeof(*mmap_dst); i++ )
+ {
+ /* Init size member properly. */
+ mmap_dst[i].size = sizeof(*mmap_dst);
+ mmap_dst[i].size -= sizeof(mmap_dst[i].size);
+ /* Now copy a given region data. */
+ mmap_dst[i].base_addr_low = (u32)mmap_src->addr;
+ mmap_dst[i].base_addr_high = (u32)(mmap_src->addr >> 32);
+ mmap_dst[i].length_low = (u32)mmap_src->len;
+ mmap_dst[i].length_high = (u32)(mmap_src->len >> 32);
+ mmap_dst[i].type = mmap_src->type;
+ mmap_src = _p(mmap_src) + get_mb2_data(tag, mmap, entry_size);
+ }
+ break;
+
+ case MULTIBOOT2_TAG_TYPE_MODULE:
+ if ( mod_idx >= mbi_out->mods_count )
+ break;
+
+ mbi_out_mods[mod_idx].mod_start = get_mb2_data(tag, module, mod_start);
+ mbi_out_mods[mod_idx].mod_end = get_mb2_data(tag, module, mod_end);
+ ptr = get_mb2_string(tag, module, cmdline);
+ mbi_out_mods[mod_idx].string = copy_string(ptr);
+ mbi_out_mods[mod_idx].reserved = 0;
+ ++mod_idx;
+ break;
+
+ case MULTIBOOT2_TAG_TYPE_END:
+ return mbi_out;
+
+ default:
+ break;
+ }
+
+ return mbi_out;
+}
+
+multiboot_info_t __stdcall *reloc(u32 mb_magic, u32 mbi_in, u32 trampoline)
+{
+ alloc = trampoline;
+
+ if ( mb_magic == MULTIBOOT2_BOOTLOADER_MAGIC )
+ return mbi2_reloc(mbi_in);
+ else
+ return mbi_reloc(mbi_in);
+}
@@ -13,6 +13,7 @@
#include <asm/fixmap.h>
#include <asm/hardirq.h>
#include <xen/multiboot.h>
+#include <xen/multiboot2.h>
#define DEFINE(_sym, _val) \
asm volatile ("\n.ascii\"==>#define " #_sym " %0 /* " #_val " */<==\"" \
@@ -167,6 +168,14 @@ void __dummy__(void)
OFFSET(MB_flags, multiboot_info_t, flags);
OFFSET(MB_cmdline, multiboot_info_t, cmdline);
OFFSET(MB_mem_lower, multiboot_info_t, mem_lower);
+ BLANK();
+
+ DEFINE(MB2_fixed_sizeof, sizeof(multiboot2_fixed_t));
+ OFFSET(MB2_fixed_total_size, multiboot2_fixed_t, total_size);
+ OFFSET(MB2_tag_type, multiboot2_tag_t, type);
+ OFFSET(MB2_tag_size, multiboot2_tag_t, size);
+ OFFSET(MB2_mem_lower, multiboot2_tag_basic_meminfo_t, mem_lower);
+ BLANK();
OFFSET(DOMAIN_vm_assist, struct domain, vm_assist);
}
new file mode 100644
@@ -0,0 +1,169 @@
+/*
+ * Copyright (C) 1999,2003,2007,2008,2009,2010 Free Software Foundation, Inc.
+ *
+ * multiboot2.h - Multiboot 2 header file.
+ *
+ * Based on grub-2.00/include/multiboot2.h file.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL ANY
+ * DEVELOPER OR DISTRIBUTOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
+ * IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef __MULTIBOOT2_H__
+#define __MULTIBOOT2_H__
+
+/* The magic field should contain this. */
+#define MULTIBOOT2_HEADER_MAGIC 0xe85250d6
+
+/* This should be in %eax on x86 architecture. */
+#define MULTIBOOT2_BOOTLOADER_MAGIC 0x36d76289
+
+/* How many bytes from the start of the file we search for the header. */
+#define MULTIBOOT2_SEARCH 32768
+
+/* Multiboot 2 header alignment. */
+#define MULTIBOOT2_HEADER_ALIGN 8
+
+/* Alignment of multiboot 2 modules. */
+#define MULTIBOOT2_MOD_ALIGN 0x00001000
+
+/* Alignment of the multiboot 2 info structure. */
+#define MULTIBOOT2_INFO_ALIGN 0x00000008
+
+/* Multiboot 2 architectures. */
+#define MULTIBOOT2_ARCHITECTURE_I386 0
+#define MULTIBOOT2_ARCHITECTURE_MIPS32 4
+
+/* Header tag types. */
+#define MULTIBOOT2_HEADER_TAG_END 0
+#define MULTIBOOT2_HEADER_TAG_INFORMATION_REQUEST 1
+#define MULTIBOOT2_HEADER_TAG_ADDRESS 2
+#define MULTIBOOT2_HEADER_TAG_ENTRY_ADDRESS 3
+#define MULTIBOOT2_HEADER_TAG_CONSOLE_FLAGS 4
+#define MULTIBOOT2_HEADER_TAG_FRAMEBUFFER 5
+#define MULTIBOOT2_HEADER_TAG_MODULE_ALIGN 6
+#define MULTIBOOT2_HEADER_TAG_EFI_BS 7
+#define MULTIBOOT2_HEADER_TAG_ENTRY_ADDRESS_EFI32 8
+#define MULTIBOOT2_HEADER_TAG_ENTRY_ADDRESS_EFI64 9
+
+/* Header tag flags. */
+#define MULTIBOOT2_HEADER_TAG_REQUIRED 0
+#define MULTIBOOT2_HEADER_TAG_OPTIONAL 1
+
+/* Header console tag console_flags. */
+#define MULTIBOOT2_CONSOLE_FLAGS_CONSOLE_REQUIRED 1
+#define MULTIBOOT2_CONSOLE_FLAGS_EGA_TEXT_SUPPORTED 2
+
+/* Flags set in the 'flags' member of the multiboot header. */
+#define MULTIBOOT2_TAG_TYPE_END 0
+#define MULTIBOOT2_TAG_TYPE_CMDLINE 1
+#define MULTIBOOT2_TAG_TYPE_BOOT_LOADER_NAME 2
+#define MULTIBOOT2_TAG_TYPE_MODULE 3
+#define MULTIBOOT2_TAG_TYPE_BASIC_MEMINFO 4
+#define MULTIBOOT2_TAG_TYPE_BOOTDEV 5
+#define MULTIBOOT2_TAG_TYPE_MMAP 6
+#define MULTIBOOT2_TAG_TYPE_VBE 7
+#define MULTIBOOT2_TAG_TYPE_FRAMEBUFFER 8
+#define MULTIBOOT2_TAG_TYPE_ELF_SECTIONS 9
+#define MULTIBOOT2_TAG_TYPE_APM 10
+#define MULTIBOOT2_TAG_TYPE_EFI32 11
+#define MULTIBOOT2_TAG_TYPE_EFI64 12
+#define MULTIBOOT2_TAG_TYPE_SMBIOS 13
+#define MULTIBOOT2_TAG_TYPE_ACPI_OLD 14
+#define MULTIBOOT2_TAG_TYPE_ACPI_NEW 15
+#define MULTIBOOT2_TAG_TYPE_NETWORK 16
+#define MULTIBOOT2_TAG_TYPE_EFI_MMAP 17
+#define MULTIBOOT2_TAG_TYPE_EFI_BS 18
+#define MULTIBOOT2_TAG_TYPE_EFI32_IH 19
+#define MULTIBOOT2_TAG_TYPE_EFI64_IH 20
+
+/* Multiboot 2 tag alignment. */
+#define MULTIBOOT2_TAG_ALIGN 8
+
+/* Memory types. */
+#define MULTIBOOT2_MEMORY_AVAILABLE 1
+#define MULTIBOOT2_MEMORY_RESERVED 2
+#define MULTIBOOT2_MEMORY_ACPI_RECLAIMABLE 3
+#define MULTIBOOT2_MEMORY_NVS 4
+#define MULTIBOOT2_MEMORY_BADRAM 5
+
+/* Framebuffer types. */
+#define MULTIBOOT2_FRAMEBUFFER_TYPE_INDEXED 0
+#define MULTIBOOT2_FRAMEBUFFER_TYPE_RGB 1
+#define MULTIBOOT2_FRAMEBUFFER_TYPE_EGA_TEXT 2
+
+#ifndef __ASSEMBLY__
+typedef struct {
+ u32 total_size;
+ u32 reserved;
+} multiboot2_fixed_t;
+
+typedef struct {
+ u32 type;
+ u32 size;
+} multiboot2_tag_t;
+
+typedef struct {
+ u32 type;
+ u32 size;
+ char string[];
+} multiboot2_tag_string_t;
+
+typedef struct {
+ u32 type;
+ u32 size;
+ u32 mem_lower;
+ u32 mem_upper;
+} multiboot2_tag_basic_meminfo_t;
+
+typedef struct {
+ u64 addr;
+ u64 len;
+ u32 type;
+ u32 zero;
+} multiboot2_memory_map_t;
+
+typedef struct {
+ u32 type;
+ u32 size;
+ u32 entry_size;
+ u32 entry_version;
+ multiboot2_memory_map_t entries[];
+} multiboot2_tag_mmap_t;
+
+typedef struct {
+ u32 type;
+ u32 size;
+ u64 pointer;
+} multiboot2_tag_efi64_t;
+
+typedef struct {
+ u32 type;
+ u32 size;
+ u64 pointer;
+} multiboot2_tag_efi64_ih_t;
+
+typedef struct {
+ u32 type;
+ u32 size;
+ u32 mod_start;
+ u32 mod_end;
+ char cmdline[];
+} multiboot2_tag_module_t;
+#endif /* __ASSEMBLY__ */
+
+#endif /* __MULTIBOOT2_H__ */