@@ -28,6 +28,7 @@
#include "hw/hw.h"
#include "hw/nvram/fw_cfg.h"
#include "multiboot.h"
+#include "multiboot_header.h"
#include "hw/loader.h"
#include "elf.h"
#include "sysemu/sysemu.h"
@@ -47,39 +48,9 @@
#error multiboot struct needs to fit in 16 bit real mode
#endif
-enum {
- /* Multiboot info */
- MBI_FLAGS = 0,
- MBI_MEM_LOWER = 4,
- MBI_MEM_UPPER = 8,
- MBI_BOOT_DEVICE = 12,
- MBI_CMDLINE = 16,
- MBI_MODS_COUNT = 20,
- MBI_MODS_ADDR = 24,
- MBI_MMAP_ADDR = 48,
- MBI_BOOTLOADER = 64,
-
- MBI_SIZE = 88,
-
- /* Multiboot modules */
- MB_MOD_START = 0,
- MB_MOD_END = 4,
- MB_MOD_CMDLINE = 8,
-
- MB_MOD_SIZE = 16,
-
- /* Region offsets */
- ADDR_E820_MAP = MULTIBOOT_STRUCT_ADDR + 0,
- ADDR_MBI = ADDR_E820_MAP + 0x500,
-
- /* Multiboot flags */
- MULTIBOOT_FLAGS_MEMORY = 1 << 0,
- MULTIBOOT_FLAGS_BOOT_DEVICE = 1 << 1,
- MULTIBOOT_FLAGS_CMDLINE = 1 << 2,
- MULTIBOOT_FLAGS_MODULES = 1 << 3,
- MULTIBOOT_FLAGS_MMAP = 1 << 6,
- MULTIBOOT_FLAGS_BOOTLOADER = 1 << 9,
-};
+/* Region offsets */
+#define ADDR_E820_MAP MULTIBOOT_STRUCT_ADDR
+#define ADDR_MBI (ADDR_E820_MAP + 0x500)
typedef struct {
/* buffer holding kernel, cmdlines and mb_infos */
@@ -128,14 +99,14 @@ static void mb_add_mod(MultibootState *s,
hwaddr start, hwaddr end,
hwaddr cmdline_phys)
{
- char *p;
+ multiboot_module_t *mod;
assert(s->mb_mods_count < s->mb_mods_avail);
- p = (char *)s->mb_buf + s->offset_mbinfo + MB_MOD_SIZE * s->mb_mods_count;
+ mod = s->mb_buf + s->offset_mbinfo + sizeof(multiboot_module_t) * s->mb_mods_count;
- stl_p(p + MB_MOD_START, start);
- stl_p(p + MB_MOD_END, end);
- stl_p(p + MB_MOD_CMDLINE, cmdline_phys);
+ stl_p(&mod->mod_start, start);
+ stl_p(&mod->mod_end, end);
+ stl_p(&mod->cmdline, cmdline_phys);
mb_debug("mod%02d: "TARGET_FMT_plx" - "TARGET_FMT_plx"\n",
s->mb_mods_count, start, end);
@@ -151,26 +122,29 @@ int load_multiboot(FWCfgState *fw_cfg,
int kernel_file_size,
uint8_t *header)
{
- int i, is_multiboot = 0;
+ int i;
+ bool is_multiboot = false;
uint32_t flags = 0;
uint32_t mh_entry_addr;
uint32_t mh_load_addr;
uint32_t mb_kernel_size;
MultibootState mbs;
- uint8_t bootinfo[MBI_SIZE];
+ multiboot_info_t bootinfo;
uint8_t *mb_bootinfo_data;
uint32_t cmdline_len;
+ struct multiboot_header *multiboot_header;
/* Ok, let's see if it is a multiboot image.
The header is 12x32bit long, so the latest entry may be 8192 - 48. */
for (i = 0; i < (8192 - 48); i += 4) {
- if (ldl_p(header+i) == 0x1BADB002) {
- uint32_t checksum = ldl_p(header+i+8);
- flags = ldl_p(header+i+4);
+ multiboot_header = (struct multiboot_header *)(header + i);
+ if (ldl_p(&multiboot_header->magic) == MULTIBOOT_HEADER_MAGIC) {
+ uint32_t checksum = ldl_p(&multiboot_header->checksum);
+ flags = ldl_p(&multiboot_header->flags);
checksum += flags;
- checksum += (uint32_t)0x1BADB002;
+ checksum += (uint32_t)MULTIBOOT_HEADER_MAGIC;
if (!checksum) {
- is_multiboot = 1;
+ is_multiboot = true;
break;
}
}
@@ -180,13 +154,13 @@ int load_multiboot(FWCfgState *fw_cfg,
return 0; /* no multiboot */
mb_debug("qemu: I believe we found a multiboot image!\n");
- memset(bootinfo, 0, sizeof(bootinfo));
+ memset(&bootinfo, 0, sizeof(bootinfo));
memset(&mbs, 0, sizeof(mbs));
- if (flags & 0x00000004) { /* MULTIBOOT_HEADER_HAS_VBE */
+ if (flags & MULTIBOOT_VIDEO_MODE) {
fprintf(stderr, "qemu: multiboot knows VBE. we don't.\n");
}
- if (!(flags & 0x00010000)) { /* MULTIBOOT_HEADER_HAS_ADDR */
+ if (!(flags & MULTIBOOT_AOUT_KLUDGE)) {
uint64_t elf_entry;
uint64_t elf_low, elf_high;
int kernel_size;
@@ -217,14 +191,14 @@ int load_multiboot(FWCfgState *fw_cfg,
mb_debug("qemu: loading multiboot-elf kernel (%#x bytes) with entry %#zx\n",
mb_kernel_size, (size_t)mh_entry_addr);
} else {
- /* Valid if mh_flags sets MULTIBOOT_HEADER_HAS_ADDR. */
- uint32_t mh_header_addr = ldl_p(header+i+12);
- uint32_t mh_load_end_addr = ldl_p(header+i+20);
- uint32_t mh_bss_end_addr = ldl_p(header+i+24);
- mh_load_addr = ldl_p(header+i+16);
+ /* Valid if mh_flags sets MULTIBOOT_AOUT_KLUDGE. */
+ uint32_t mh_header_addr = ldl_p(&multiboot_header->header_addr);
+ uint32_t mh_load_end_addr = ldl_p(&multiboot_header->load_end_addr);
+ uint32_t mh_bss_end_addr = ldl_p(&multiboot_header->bss_end_addr);
+ mh_load_addr = ldl_p(&multiboot_header->load_addr);
uint32_t mb_kernel_text_offset = i - (mh_header_addr - mh_load_addr);
uint32_t mb_load_size = 0;
- mh_entry_addr = ldl_p(header+i+28);
+ mh_entry_addr = ldl_p(&multiboot_header->entry_addr);
if (mh_load_end_addr) {
mb_kernel_size = mh_bss_end_addr - mh_load_addr;
@@ -234,11 +208,11 @@ int load_multiboot(FWCfgState *fw_cfg,
mb_load_size = mb_kernel_size;
}
- /* Valid if mh_flags sets MULTIBOOT_HEADER_HAS_VBE.
- uint32_t mh_mode_type = ldl_p(header+i+32);
- uint32_t mh_width = ldl_p(header+i+36);
- uint32_t mh_height = ldl_p(header+i+40);
- uint32_t mh_depth = ldl_p(header+i+44); */
+ /* Valid if mh_flags sets MULTIBOOT_VIDEO_MODE.
+ uint32_t mh_mode_type = ldl_p(&multiboot_header->mode_type);
+ uint32_t mh_width = ldl_p(&multiboot_header->width);
+ uint32_t mh_height = ldl_p(&multiboot_header->height);
+ uint32_t mh_depth = ldl_p(&multiboot_header->depth); */
mb_debug("multiboot: mh_header_addr = %#x\n", mh_header_addr);
mb_debug("multiboot: mh_load_addr = %#x\n", mh_load_addr);
@@ -276,14 +250,14 @@ int load_multiboot(FWCfgState *fw_cfg,
}
mbs.mb_buf_size += cmdline_len;
- mbs.mb_buf_size += MB_MOD_SIZE * mbs.mb_mods_avail;
+ mbs.mb_buf_size += sizeof(multiboot_module_t) * mbs.mb_mods_avail;
mbs.mb_buf_size += strlen(bootloader_name) + 1;
mbs.mb_buf_size = TARGET_PAGE_ALIGN(mbs.mb_buf_size);
/* enlarge mb_buf to hold cmdlines, bootloader, mb-info structs */
mbs.mb_buf = g_realloc(mbs.mb_buf, mbs.mb_buf_size);
- mbs.offset_cmdlines = mbs.offset_mbinfo + mbs.mb_mods_avail * MB_MOD_SIZE;
+ mbs.offset_cmdlines = mbs.offset_mbinfo + mbs.mb_mods_avail * sizeof(multiboot_module_t);
mbs.offset_bootloader = mbs.offset_cmdlines + cmdline_len;
if (initrd_filename) {
@@ -329,22 +303,22 @@ int load_multiboot(FWCfgState *fw_cfg,
char kcmdline[strlen(kernel_filename) + strlen(kernel_cmdline) + 2];
snprintf(kcmdline, sizeof(kcmdline), "%s %s",
kernel_filename, kernel_cmdline);
- stl_p(bootinfo + MBI_CMDLINE, mb_add_cmdline(&mbs, kcmdline));
+ stl_p(&bootinfo.cmdline, mb_add_cmdline(&mbs, kcmdline));
- stl_p(bootinfo + MBI_BOOTLOADER, mb_add_bootloader(&mbs, bootloader_name));
+ stl_p(&bootinfo.boot_loader_name, mb_add_bootloader(&mbs, bootloader_name));
- stl_p(bootinfo + MBI_MODS_ADDR, mbs.mb_buf_phys + mbs.offset_mbinfo);
- stl_p(bootinfo + MBI_MODS_COUNT, mbs.mb_mods_count); /* mods_count */
+ stl_p(&bootinfo.mods_addr, mbs.mb_buf_phys + mbs.offset_mbinfo);
+ stl_p(&bootinfo.mods_count, mbs.mb_mods_count); /* mods_count */
/* the kernel is where we want it to be now */
- stl_p(bootinfo + MBI_FLAGS, MULTIBOOT_FLAGS_MEMORY
- | MULTIBOOT_FLAGS_BOOT_DEVICE
- | MULTIBOOT_FLAGS_CMDLINE
- | MULTIBOOT_FLAGS_MODULES
- | MULTIBOOT_FLAGS_MMAP
- | MULTIBOOT_FLAGS_BOOTLOADER);
- stl_p(bootinfo + MBI_BOOT_DEVICE, 0x8000ffff); /* XXX: use the -boot switch? */
- stl_p(bootinfo + MBI_MMAP_ADDR, ADDR_E820_MAP);
+ stl_p(&bootinfo.flags, MULTIBOOT_INFO_MEMORY
+ | MULTIBOOT_INFO_BOOTDEV
+ | MULTIBOOT_INFO_CMDLINE
+ | MULTIBOOT_INFO_MODS
+ | MULTIBOOT_INFO_MEM_MAP
+ | MULTIBOOT_INFO_BOOT_LOADER_NAME);
+ stl_p(&bootinfo.boot_device, 0x8000ffff); /* XXX: use the -boot switch? */
+ stl_p(&bootinfo.mmap_addr, ADDR_E820_MAP);
mb_debug("multiboot: mh_entry_addr = %#x\n", mh_entry_addr);
mb_debug(" mb_buf_phys = "TARGET_FMT_plx"\n", mbs.mb_buf_phys);
@@ -353,7 +327,7 @@ int load_multiboot(FWCfgState *fw_cfg,
/* save bootinfo off the stack */
mb_bootinfo_data = g_malloc(sizeof(bootinfo));
- memcpy(mb_bootinfo_data, bootinfo, sizeof(bootinfo));
+ memcpy(mb_bootinfo_data, &bootinfo, sizeof(bootinfo));
/* Pass variables to option rom */
fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_ENTRY, mh_entry_addr);
new file mode 100644
@@ -0,0 +1,265 @@
+/* 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
+
+struct multiboot_header
+{
+ /* Must be MULTIBOOT_MAGIC - see above. */
+ uint32_t magic;
+
+ /* Feature flags. */
+ uint32_t flags;
+
+ /* The above fields plus this one must equal 0 mod 2^32. */
+ uint32_t checksum;
+
+ /* These are only valid if MULTIBOOT_AOUT_KLUDGE is set. */
+ uint32_t header_addr;
+ uint32_t load_addr;
+ uint32_t load_end_addr;
+ uint32_t bss_end_addr;
+ uint32_t entry_addr;
+
+ /* These are only valid if MULTIBOOT_VIDEO_MODE is set. */
+ uint32_t mode_type;
+ uint32_t width;
+ uint32_t height;
+ uint32_t depth;
+};
+
+/* The symbol table for a.out. */
+struct multiboot_aout_symbol_table
+{
+ uint32_t tabsize;
+ uint32_t strsize;
+ uint32_t addr;
+ 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
+{
+ uint32_t num;
+ uint32_t size;
+ uint32_t addr;
+ uint32_t shndx;
+};
+typedef struct multiboot_elf_section_header_table multiboot_elf_section_header_table_t;
+
+struct multiboot_info
+{
+ /* Multiboot info version number */
+ uint32_t flags;
+
+ /* Available memory from BIOS */
+ uint32_t mem_lower;
+ uint32_t mem_upper;
+
+ /* "root" partition */
+ uint32_t boot_device;
+
+ /* Kernel command line */
+ uint32_t cmdline;
+
+ /* Boot-Module list */
+ uint32_t mods_count;
+ uint32_t mods_addr;
+
+ union
+ {
+ multiboot_aout_symbol_table_t aout_sym;
+ multiboot_elf_section_header_table_t elf_sec;
+ } u;
+
+ /* Memory Mapping buffer */
+ uint32_t mmap_length;
+ uint32_t mmap_addr;
+
+ /* Drive Info buffer */
+ uint32_t drives_length;
+ uint32_t drives_addr;
+
+ /* ROM configuration table */
+ uint32_t config_table;
+
+ /* Boot Loader Name */
+ uint32_t boot_loader_name;
+
+ /* APM table */
+ uint32_t apm_table;
+
+ /* Video */
+ uint32_t vbe_control_info;
+ uint32_t vbe_mode_info;
+ uint16_t vbe_mode;
+ uint16_t vbe_interface_seg;
+ uint16_t vbe_interface_off;
+ uint16_t vbe_interface_len;
+
+ uint64_t framebuffer_addr;
+ uint32_t framebuffer_pitch;
+ uint32_t framebuffer_width;
+ uint32_t framebuffer_height;
+ uint8_t framebuffer_bpp;
+#define MULTIBOOT_FRAMEBUFFER_TYPE_INDEXED 0
+#define MULTIBOOT_FRAMEBUFFER_TYPE_RGB 1
+#define MULTIBOOT_FRAMEBUFFER_TYPE_EGA_TEXT 2
+ uint8_t framebuffer_type;
+ union
+ {
+ struct
+ {
+ uint32_t framebuffer_palette_addr;
+ uint16_t framebuffer_palette_num_colors;
+ };
+ struct
+ {
+ uint8_t framebuffer_red_field_position;
+ uint8_t framebuffer_red_mask_size;
+ uint8_t framebuffer_green_field_position;
+ uint8_t framebuffer_green_mask_size;
+ uint8_t framebuffer_blue_field_position;
+ uint8_t framebuffer_blue_mask_size;
+ };
+ };
+};
+typedef struct multiboot_info multiboot_info_t;
+
+struct multiboot_color
+{
+ uint8_t red;
+ uint8_t green;
+ uint8_t blue;
+};
+
+struct multiboot_mmap_entry
+{
+ uint32_t size;
+ uint64_t addr;
+ 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
+ uint32_t type;
+} QEMU_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 */
+ uint32_t mod_start;
+ uint32_t mod_end;
+
+ /* Module command line */
+ uint32_t cmdline;
+
+ /* padding to take it to 16 bytes (must be zero) */
+ uint32_t pad;
+};
+typedef struct multiboot_mod_list multiboot_module_t;
+
+/* APM BIOS info. */
+struct multiboot_apm_info
+{
+ uint16_t version;
+ uint16_t cseg;
+ uint32_t offset;
+ uint16_t cseg_16;
+ uint16_t dseg;
+ uint16_t flags;
+ uint16_t cseg_len;
+ uint16_t cseg_16_len;
+ uint16_t dseg_len;
+};
+
+#endif /* ! MULTIBOOT_HEADER */