First attempt at a rewritten mboot module

First attempt at rewriting the mboot module to use the Syslinux
shuffle APIs.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

1 files changed, 219 insertions, 0 deletions

diff --git a/com32/mboot/mb_info.h b/com32/mboot/mb_info.h
new file mode 100644
index 00000000..ec12fe8a
--- /dev/null
+++ b/com32/mboot/mb_info.h
@@ -0,0 +1,219 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2000  Free Software Foundation, Inc.
+ *
+ *  This program 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 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program 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 this program; if not, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+/*
+ *  The structure type "mod_list" is used by the "multiboot_info" structure.
+ */
+
+#include <inttypes.h>
+
+struct 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;
+};
+
+
+/*
+ *  INT-15, AX=E820 style "AddressRangeDescriptor"
+ *  ...with a "size" parameter on the front which is the structure size - 4,
+ *  pointing to the next one, up until the full buffer length of the memory
+ *  map has been reached.
+ */
+
+struct AddrRangeDesc
+{
+  uint32_t size;
+  uint64_t BaseAddr;
+  uint64_t Length;
+  uint32_t Type;
+
+  /* unspecified optional padding... */
+} __attribute__((packed));
+
+/* usable memory "Type", all others are reserved.  */
+#define MB_ARD_MEMORY		1
+
+
+/* Drive Info structure.  */
+struct drive_info
+{
+  /* The size of this structure.  */
+  uint32_t size;
+
+  /* The BIOS drive number.  */
+  uint8_t  drive_number;
+
+  /* The access mode (see below).  */
+  uint8_t  drive_mode;
+
+  /* The BIOS geometry.  */
+  uint16_t drive_cylinders;
+  uint8_t  drive_heads;
+  uint8_t  drive_sectors;
+
+  /* The array of I/O ports used for the drive.  */
+  uint16_t drive_ports[0];
+};
+
+/* Drive Mode.  */
+#define MB_DI_CHS_MODE		0
+#define MB_DI_LBA_MODE		1
+
+
+/* APM BIOS info.  */
+struct apm_info
+{
+  uint16_t version;
+  uint16_t cseg;
+  uint32_t offset;
+  uint16_t cseg_16;
+  uint16_t dseg_16;
+  uint16_t cseg_len;
+  uint16_t cseg_16_len;
+  uint16_t dseg_16_len;
+};
+
+
+/*
+ *  MultiBoot Info description
+ *
+ *  This is the struct passed to the boot image.  This is done by placing
+ *  its address in the EAX register.
+ */
+
+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
+  {
+    struct
+    {
+      /* (a.out) Kernel symbol table info */
+      uint32_t tabsize;
+      uint32_t strsize;
+      uint32_t addr;
+      uint32_t pad;
+    }
+    a;
+
+    struct
+    {
+      /* (ELF) Kernel section header table */
+      uint32_t num;
+      uint32_t size;
+      uint32_t addr;
+      uint32_t shndx;
+    }
+    e;
+  }
+  syms;
+
+  /* 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;
+};
+
+/*
+ *  Flags to be set in the 'flags' parameter above
+ */
+
+/* is there basic lower/upper memory information? */
+#define MB_INFO_MEMORY			0x00000001
+/* is there a boot device set? */
+#define MB_INFO_BOOTDEV			0x00000002
+/* is the command-line defined? */
+#define MB_INFO_CMDLINE			0x00000004
+/* are there modules to do something with? */
+#define MB_INFO_MODS			0x00000008
+
+/* These next two are mutually exclusive */
+
+/* is there a symbol table loaded? */
+#define MB_INFO_AOUT_SYMS		0x00000010
+/* is there an ELF section header table? */
+#define MB_INFO_ELF_SHDR		0x00000020
+
+/* is there a full memory map? */
+#define MB_INFO_MEM_MAP			0x00000040
+
+/* Is there drive info?  */
+#define MB_INFO_DRIVE_INFO		0x00000080
+
+/* Is there a config table?  */
+#define MB_INFO_CONFIG_TABLE		0x00000100
+
+/* Is there a boot loader name?  */
+#define MB_INFO_BOOT_LOADER_NAME	0x00000200
+
+/* Is there a APM table?  */
+#define MB_INFO_APM_TABLE		0x00000400
+
+/* Is there video information?  */
+#define MB_INFO_VIDEO_INFO		0x00000800
+
+/*
+ *  The following value must be present in the EAX register.
+ */
+
+#define MULTIBOOT_VALID			0x2BADB002