Add multiboot support.
I've been successfully using SeaBIOS as secondary bootloader. In more details
I have GRUB2-as-payload in flash together with coreboot. SeaBIOS binary is on
the HDD and loaded by GRUB when needed. This has an unfortunate consequence
that I have to keep vga oprom in flash even if usually I boot without it. This
patches makes bios.bin.elf multiboot executable with files passed as modules.
Example:
menuentry "SeaBIOS (mb)" --unrestricted {
root=ahci0,2
multiboot /bios.bin.elf
module /vgabios_x230.rom name=pci8086,0166.rom
}
the parameter name= specifies under which name SeaBIOS will see it.
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
diff --git a/Makefile b/Makefile
index 01cadda..96aec48 100644
--- a/Makefile
+++ b/Makefile
@@ -40,7 +40,7 @@
SRC32FLAT=$(SRCBOTH) post.c memmap.c malloc.c romfile.c x86.c optionroms.c \
pmm.c font.c boot.c bootsplash.c jpeg.c bmp.c tcgbios.c sha1.c \
hw/ahci.c hw/pvscsi.c hw/usb-xhci.c hw/usb-hub.c hw/sdcard.c \
- fw/coreboot.c fw/lzmadecode.c fw/csm.c fw/biostables.c \
+ fw/coreboot.c fw/lzmadecode.c fw/multiboot.c fw/csm.c fw/biostables.c \
fw/paravirt.c fw/shadow.c fw/pciinit.c fw/smm.c fw/smp.c fw/mtrr.c fw/xen.c \
fw/acpi.c fw/mptable.c fw/pirtable.c fw/smbios.c fw/romfile_loader.c \
hw/tpm_drivers.c
diff --git a/scripts/layoutrom.py b/scripts/layoutrom.py
index dd770fe..b976fb0 100755
--- a/scripts/layoutrom.py
+++ b/scripts/layoutrom.py
@@ -161,6 +161,7 @@
# The sections (and associated information) to be placed in output rom
class LayoutInfo:
sections = None
+ config = None
genreloc = None
sec32init_start = sec32init_end = sec32init_align = None
sec32low_start = sec32low_end = None
@@ -172,6 +173,7 @@
# Determine final memory addresses for sections
def doLayout(sections, config, genreloc):
li = LayoutInfo()
+ li.config = config
li.sections = sections
li.genreloc = genreloc
# Determine 16bit positions
@@ -399,6 +401,10 @@
filesections32flat = getSectionsFileid(li.sections, '32flat')
out = outXRefs([], exportsyms=li.varlowsyms
, forcedelta=li.final_sec32low_start-li.sec32low_start)
+ multiboot_header = ""
+ if li.config.get('CONFIG_MULTIBOOT'):
+ multiboot_header = "LONG(0x1BADB002) LONG(0) LONG(-0x1BADB002)"
+ sec32all_start -= 3 * 4
out += outXRefs(filesections32flat, exportsyms=[li.entrysym]) + """
_reloc_min_align = 0x%x ;
zonefseg_start = 0x%x ;
@@ -415,6 +421,7 @@
.text code32flat_start : {
%s
%s
+%s
code32flat_end = ABSOLUTE(.) ;
} :text
""" % (li.sec32init_align,
@@ -428,6 +435,7 @@
li.sec32init_start,
li.sec32init_end,
sec32all_start,
+ multiboot_header,
relocstr,
outRelSections(li.sections, 'code32flat_start'))
out = COMMONHEADER + out + COMMONTRAILER + """
diff --git a/src/Kconfig b/src/Kconfig
index 19f4db1..14c38fb 100644
--- a/src/Kconfig
+++ b/src/Kconfig
@@ -102,6 +102,13 @@
default y
help
Support floppy images in coreboot flash.
+ config MULTIBOOT
+ depends on COREBOOT
+ bool "multiboot support"
+ default y
+ help
+ Add multiboot header in bios.bin.raw and accept files supplied
+ as multiboot modules.
config ENTRY_EXTRASTACK
bool "Use internal stack for 16bit interrupt entry points"
default y
diff --git a/src/fw/multiboot.c b/src/fw/multiboot.c
new file mode 100644
index 0000000..d9df067
--- /dev/null
+++ b/src/fw/multiboot.c
@@ -0,0 +1,111 @@
+// Multiboot interface support.
+//
+// Copyright (C) 2015 Vladimir Serbinenko <phcoder@gmail.com>
+//
+// This file may be distributed under the terms of the GNU LGPLv3 license.
+
+#include "config.h" // CONFIG_*
+#include "malloc.h" // free
+#include "output.h" // dprintf
+#include "romfile.h" // romfile_add
+#include "std/multiboot.h" // MULTIBOOT_*
+#include "string.h" // memset
+#include "util.h" // multiboot_init
+
+struct mbfs_romfile_s {
+ struct romfile_s file;
+ void *data;
+};
+
+static int
+extract_filename(char *dest, char *src, size_t lim)
+{
+ char *ptr;
+ for (ptr = src; *ptr; ptr++) {
+ if (!(ptr == src || ptr[-1] == ' ' || ptr[-1] == '\t'))
+ continue;
+ /* memcmp stops early if it encounters \0 as it doesn't match name=. */
+ if (memcmp(ptr, "name=", 5) == 0) {
+ int i;
+ char *optr = dest;
+ for (i = 0, ptr += 5; *ptr && *ptr != ' ' && i < lim; i++) {
+ *optr++ = *ptr++;
+ }
+ *optr++ = '\0';
+ return 1;
+ }
+ }
+ return 0;
+}
+
+// Copy a file to memory
+static int
+mbfs_copyfile(struct romfile_s *file, void *dst, u32 maxlen)
+{
+ struct mbfs_romfile_s *cfile;
+ cfile = container_of(file, struct mbfs_romfile_s, file);
+ u32 size = cfile->file.size;
+ void *src = cfile->data;
+
+ // Not compressed.
+ dprintf(3, "Copying data %d@%p to %d@%p\n", size, src, maxlen, dst);
+ if (size > maxlen) {
+ warn_noalloc();
+ return -1;
+ }
+ iomemcpy(dst, src, size);
+ return size;
+}
+
+u32 __VISIBLE entry_elf_eax, entry_elf_ebx;
+
+void
+multiboot_init(void)
+{
+ struct multiboot_info *mbi;
+ if (!CONFIG_MULTIBOOT)
+ return;
+ dprintf(1, "multiboot: eax=%x, ebx=%x\n", entry_elf_eax, entry_elf_ebx);
+ if (entry_elf_eax != MULTIBOOT_BOOTLOADER_MAGIC)
+ return;
+ mbi = (void *)entry_elf_ebx;
+ dprintf(1, "mbptr=%p\n", mbi);
+ dprintf(1, "flags=0x%x, mods=0x%x, mods_c=%d\n", mbi->flags, mbi->mods_addr,
+ mbi->mods_count);
+ if (!(mbi->flags & MULTIBOOT_INFO_MODS))
+ return;
+ int i;
+ struct multiboot_mod_list *mod = (void *)mbi->mods_addr;
+ for (i = 0; i < mbi->mods_count; i++) {
+ struct mbfs_romfile_s *cfile;
+ u8 *copy;
+ u32 len;
+ if (!mod[i].cmdline)
+ continue;
+ len = mod[i].mod_end - mod[i].mod_start;
+ cfile = malloc_tmp(sizeof(*cfile));
+ if (!cfile) {
+ warn_noalloc();
+ return;
+ }
+ memset(cfile, 0, sizeof(*cfile));
+ dprintf(1, "module %s, size 0x%x\n", (char *)mod[i].cmdline, len);
+ if (!extract_filename(cfile->file.name, (char *)mod[i].cmdline,
+ sizeof(cfile->file.name))) {
+ free(cfile);
+ continue;
+ }
+ dprintf(1, "assigned file name <%s>\n", cfile->file.name);
+ cfile->file.size = len;
+ copy = malloc_tmp(len);
+ if (!copy) {
+ warn_noalloc();
+ free(cfile);
+ return;
+ }
+ memcpy(copy, (void *)mod[i].mod_start, len);
+ cfile->file.copy = mbfs_copyfile;
+ cfile->data = copy;
+ romfile_add(&cfile->file);
+ }
+}
diff --git a/src/post.c b/src/post.c
index 0c7b36b..ff2cb6c 100644
--- a/src/post.c
+++ b/src/post.c
@@ -117,6 +117,7 @@
// Setup romfile items.
qemu_cfg_init();
coreboot_cbfs_init();
+ multiboot_init();
// Setup ivt/bda/ebda
ivt_init();
diff --git a/src/romlayout.S b/src/romlayout.S
index 93b6874..7938e22 100644
--- a/src/romlayout.S
+++ b/src/romlayout.S
@@ -374,6 +374,8 @@
entry_elf:
cli
cld
+ movl %eax, entry_elf_eax
+ movl %ebx, entry_elf_ebx
lidtl (BUILD_BIOS_ADDR + pmode_IDT_info)
lgdtl (BUILD_BIOS_ADDR + rombios32_gdt_48)
movl $SEG32_MODE32_DS, %eax
diff --git a/src/std/multiboot.h b/src/std/multiboot.h
new file mode 100644
index 0000000..6c95127
--- /dev/null
+++ b/src/std/multiboot.h
@@ -0,0 +1,260 @@
+/* multiboot.h - Multiboot header file. */
+/* Copyright (C) 1999,2003,2007,2008,2009,2010 Free Software Foundation, Inc.
+ *
+ * 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 MULTIBOOT_HEADER
+#define MULTIBOOT_HEADER 1
+
+/* How many bytes from the start of the file we search for the header. */
+#define MULTIBOOT_SEARCH 8192
+#define MULTIBOOT_HEADER_ALIGN 4
+
+/* The magic field should contain this. */
+#define MULTIBOOT_HEADER_MAGIC 0x1BADB002
+
+/* This should be in %eax. */
+#define MULTIBOOT_BOOTLOADER_MAGIC 0x2BADB002
+
+/* Alignment of multiboot modules. */
+#define MULTIBOOT_MOD_ALIGN 0x00001000
+
+/* Alignment of the multiboot info structure. */
+#define MULTIBOOT_INFO_ALIGN 0x00000004
+
+/* Flags set in the 'flags' member of the multiboot header. */
+
+/* Align all boot modules on i386 page (4KB) boundaries. */
+#define MULTIBOOT_PAGE_ALIGN 0x00000001
+
+/* Must pass memory information to OS. */
+#define MULTIBOOT_MEMORY_INFO 0x00000002
+
+/* Must pass video information to OS. */
+#define MULTIBOOT_VIDEO_MODE 0x00000004
+
+/* This flag indicates the use of the address fields in the header. */
+#define MULTIBOOT_AOUT_KLUDGE 0x00010000
+
+/* Flags to be set in the 'flags' member of the multiboot info structure. */
+
+/* is there basic lower/upper memory information? */
+#define MULTIBOOT_INFO_MEMORY 0x00000001
+/* is there a boot device set? */
+#define MULTIBOOT_INFO_BOOTDEV 0x00000002
+/* is the command-line defined? */
+#define MULTIBOOT_INFO_CMDLINE 0x00000004
+/* are there modules to do something with? */
+#define MULTIBOOT_INFO_MODS 0x00000008
+
+/* These next two are mutually exclusive */
+
+/* is there a symbol table loaded? */
+#define MULTIBOOT_INFO_AOUT_SYMS 0x00000010
+/* is there an ELF section header table? */
+#define MULTIBOOT_INFO_ELF_SHDR 0X00000020
+
+/* is there a full memory map? */
+#define MULTIBOOT_INFO_MEM_MAP 0x00000040
+
+/* Is there drive info? */
+#define MULTIBOOT_INFO_DRIVE_INFO 0x00000080
+
+/* Is there a config table? */
+#define MULTIBOOT_INFO_CONFIG_TABLE 0x00000100
+
+/* Is there a boot loader name? */
+#define MULTIBOOT_INFO_BOOT_LOADER_NAME 0x00000200
+
+/* Is there a APM table? */
+#define MULTIBOOT_INFO_APM_TABLE 0x00000400
+
+/* Is there video information? */
+#define MULTIBOOT_INFO_VBE_INFO 0x00000800
+#define MULTIBOOT_INFO_FRAMEBUFFER_INFO 0x00001000
+
+#ifndef ASM_FILE
+
+typedef unsigned char multiboot_uint8_t;
+typedef unsigned short multiboot_uint16_t;
+typedef unsigned int multiboot_uint32_t;
+typedef unsigned long long multiboot_uint64_t;
+
+struct multiboot_header
+{
+ /* Must be MULTIBOOT_MAGIC - see above. */
+ multiboot_uint32_t magic;
+
+ /* Feature flags. */
+ multiboot_uint32_t flags;
+
+ /* The above fields plus this one must equal 0 mod 2^32. */
+ multiboot_uint32_t checksum;
+
+ /* These are only valid if MULTIBOOT_AOUT_KLUDGE is set. */
+ multiboot_uint32_t header_addr;
+ multiboot_uint32_t load_addr;
+ multiboot_uint32_t load_end_addr;
+ multiboot_uint32_t bss_end_addr;
+ multiboot_uint32_t entry_addr;
+
+ /* These are only valid if MULTIBOOT_VIDEO_MODE is set. */
+ multiboot_uint32_t mode_type;
+ multiboot_uint32_t width;
+ multiboot_uint32_t height;
+ multiboot_uint32_t depth;
+};
+
+/* The symbol table for a.out. */
+struct multiboot_aout_symbol_table
+{
+ multiboot_uint32_t tabsize;
+ multiboot_uint32_t strsize;
+ multiboot_uint32_t addr;
+ multiboot_uint32_t reserved;
+};
+typedef struct multiboot_aout_symbol_table multiboot_aout_symbol_table_t;
+
+/* The section header table for ELF. */
+struct multiboot_elf_section_header_table
+{
+ multiboot_uint32_t num;
+ multiboot_uint32_t size;
+ multiboot_uint32_t addr;
+ multiboot_uint32_t shndx;
+};
+typedef struct multiboot_elf_section_header_table multiboot_elf_section_header_table_t;
+
+struct multiboot_info
+{
+ /* Multiboot info version number */
+ multiboot_uint32_t flags;
+
+ /* Available memory from BIOS */
+ multiboot_uint32_t mem_lower;
+ multiboot_uint32_t mem_upper;
+
+ /* "root" partition */
+ multiboot_uint32_t boot_device;
+
+ /* Kernel command line */
+ multiboot_uint32_t cmdline;
+
+ /* Boot-Module list */
+ multiboot_uint32_t mods_count;
+ multiboot_uint32_t mods_addr;
+
+ union
+ {
+ multiboot_aout_symbol_table_t aout_sym;
+ multiboot_elf_section_header_table_t elf_sec;
+ } u;
+
+ /* Memory Mapping buffer */
+ multiboot_uint32_t mmap_length;
+ multiboot_uint32_t mmap_addr;
+
+ /* Drive Info buffer */
+ multiboot_uint32_t drives_length;
+ multiboot_uint32_t drives_addr;
+
+ /* ROM configuration table */
+ multiboot_uint32_t config_table;
+
+ /* Boot Loader Name */
+ multiboot_uint32_t boot_loader_name;
+
+ /* APM table */
+ multiboot_uint32_t apm_table;
+
+ /* Video */
+ multiboot_uint32_t vbe_control_info;
+ multiboot_uint32_t vbe_mode_info;
+ multiboot_uint16_t vbe_mode;
+ multiboot_uint16_t vbe_interface_seg;
+ multiboot_uint16_t vbe_interface_off;
+ multiboot_uint16_t vbe_interface_len;
+
+ multiboot_uint64_t framebuffer_addr;
+ multiboot_uint32_t framebuffer_pitch;
+ multiboot_uint32_t framebuffer_width;
+ multiboot_uint32_t framebuffer_height;
+ multiboot_uint8_t framebuffer_bpp;
+#define MULTIBOOT_FRAMEBUFFER_TYPE_INDEXED 0
+#define MULTIBOOT_FRAMEBUFFER_TYPE_RGB 1
+#define MULTIBOOT_FRAMEBUFFER_TYPE_EGA_TEXT 2
+ multiboot_uint8_t framebuffer_type;
+ union
+ {
+ struct
+ {
+ multiboot_uint32_t framebuffer_palette_addr;
+ multiboot_uint16_t framebuffer_palette_num_colors;
+ };
+ struct
+ {
+ multiboot_uint8_t framebuffer_red_field_position;
+ multiboot_uint8_t framebuffer_red_mask_size;
+ multiboot_uint8_t framebuffer_green_field_position;
+ multiboot_uint8_t framebuffer_green_mask_size;
+ multiboot_uint8_t framebuffer_blue_field_position;
+ multiboot_uint8_t framebuffer_blue_mask_size;
+ };
+ };
+};
+typedef struct multiboot_info multiboot_info_t;
+
+struct multiboot_color
+{
+ multiboot_uint8_t red;
+ multiboot_uint8_t green;
+ multiboot_uint8_t blue;
+};
+
+struct multiboot_mmap_entry
+{
+ multiboot_uint32_t size;
+ multiboot_uint64_t addr;
+ multiboot_uint64_t len;
+#define MULTIBOOT_MEMORY_AVAILABLE 1
+#define MULTIBOOT_MEMORY_RESERVED 2
+#define MULTIBOOT_MEMORY_ACPI_RECLAIMABLE 3
+#define MULTIBOOT_MEMORY_NVS 4
+#define MULTIBOOT_MEMORY_BADRAM 5
+ multiboot_uint32_t type;
+} __attribute__((packed));
+typedef struct multiboot_mmap_entry multiboot_memory_map_t;
+
+struct multiboot_mod_list
+{
+ /* the memory used goes from bytes 'mod_start' to 'mod_end-1' inclusive */
+ multiboot_uint32_t mod_start;
+ multiboot_uint32_t mod_end;
+
+ /* Module command line */
+ multiboot_uint32_t cmdline;
+
+ /* padding to take it to 16 bytes (must be zero) */
+ multiboot_uint32_t pad;
+};
+typedef struct multiboot_mod_list multiboot_module_t;
+
+#endif /* ! ASM_FILE */
+
+#endif /* ! MULTIBOOT_HEADER */
diff --git a/src/util.h b/src/util.h
index 2244090..6250c12 100644
--- a/src/util.h
+++ b/src/util.h
@@ -105,6 +105,9 @@
// fw/mtrr.c
void mtrr_setup(void);
+// fw/multiboot.c
+void multiboot_init(void);
+
// fw/pciinit.c
extern const u8 pci_irqs[4];
void pci_setup(void);