[PATCH] convert biosdisk into a module

[Robert Millan <rmh@aybabtu.com>]

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This patch converts biosdisk into a module.

In the future, maybe we can also move some of the grub_biosdisk_* functions
in kern/i386/pc/startup.S into this module, but it seems the build system
reacts very adversely to modules containing standalone assembly files, so
I fixed one bug (see followup) and gave up.

-- 
Robert Millan

<GPLv2> I know my rights; I want my phone call!
<DRM> What use is a phone call, if you are unable to speak?
(as seen on /.)

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2007-10-19  Robert Millan  <rmh@aybabtu.com>

	* conf/i386-pc.rmk (kernel_img_SOURCES): Remove `disk/i386/pc/biosdisk.c'.
	(pkgdata_MODULES): Add `biosdisk.mod'.
	(biosdisk_mod_SOURCES, biosdisk_mod_CFLAGS, biosdisk_mod_LDFLAGS): New
	variables.

	* disk/i386/pc/biosdisk.c: Include `<grub/dl.h>'.
	(grub_biosdisk_init): Replace with ...
	(GRUB_MOD_INIT(biosdisk)): ... this.
	(grub_biosdisk_fini): Replace with ...
	(GRUB_MOD_FINI(biosdisk)): ... this.

	* kern/i386/pc/init.c: Remove `<grub/machine/biosdisk.h>'.
	(grub_machine_init): Remove call to grub_biosdisk_init().
	(grub_machine_fini): Remove call to grub_machine_fini().

	* util/i386/pc/grub-install.in (modules): Add `biosdisk'.

diff -urp grub2/conf/i386-pc.rmk grub2.biosdisk/conf/i386-pc.rmk
--- grub2/conf/i386-pc.rmk	2007-10-01 17:50:34.000000000 +0200
+++ grub2.biosdisk/conf/i386-pc.rmk	2007-10-19 22:00:34.000000000 +0200
@@ -27,7 +27,7 @@ kernel_img_SOURCES = kern/i386/pc/startu
 	kern/disk.c kern/dl.c kern/file.c kern/fs.c kern/err.c \
 	kern/misc.c kern/mm.c kern/loader.c kern/rescue.c kern/term.c \
 	kern/i386/dl.c kern/i386/pc/init.c kern/parser.c kern/partition.c \
-	kern/env.c disk/i386/pc/biosdisk.c \
+	kern/env.c \
 	term/i386/pc/console.c \
 	symlist.c
 kernel_img_HEADERS = arg.h boot.h cache.h device.h disk.h dl.h elf.h elfload.h \
@@ -127,11 +127,16 @@ grub_install_SOURCES = util/i386/pc/grub
 grub_mkrescue_SOURCES = util/i386/pc/grub-mkrescue.in
 
 # Modules.
-pkgdata_MODULES = _chain.mod _linux.mod linux.mod normal.mod \
+pkgdata_MODULES = biosdisk.mod _chain.mod _linux.mod linux.mod normal.mod \
 	_multiboot.mod chain.mod multiboot.mod reboot.mod halt.mod	\
 	vbe.mod vbetest.mod vbeinfo.mod video.mod gfxterm.mod \
 	videotest.mod play.mod bitmap.mod tga.mod cpuid.mod serial.mod
 
+# For biosdisk.mod.
+biosdisk_mod_SOURCES = disk/i386/pc/biosdisk.c
+biosdisk_mod_CFLAGS = $(COMMON_CFLAGS)
+biosdisk_mod_LDFLAGS = $(COMMON_LDFLAGS)
+
 # For _chain.mod.
 _chain_mod_SOURCES = loader/i386/pc/chainloader.c
 _chain_mod_CFLAGS = $(COMMON_CFLAGS)
diff -urp grub2/disk/i386/pc/biosdisk.c grub2.biosdisk/disk/i386/pc/biosdisk.c
--- grub2/disk/i386/pc/biosdisk.c	2007-07-22 01:32:20.000000000 +0200
+++ grub2.biosdisk/disk/i386/pc/biosdisk.c	2007-10-19 22:00:34.000000000 +0200
@@ -19,6 +19,7 @@
 #include <grub/machine/biosdisk.h>
 #include <grub/machine/memory.h>
 #include <grub/disk.h>
+#include <grub/dl.h>
 #include <grub/mm.h>
 #include <grub/types.h>
 #include <grub/misc.h>
@@ -311,14 +312,12 @@ static struct grub_disk_dev grub_biosdis
     .next = 0
   };
 
-void
-grub_biosdisk_init (void)
+GRUB_MOD_INIT(biosdisk)
 {
   grub_disk_dev_register (&grub_biosdisk_dev);
 }
 
-void
-grub_biosdisk_fini (void)
+GRUB_MOD_FINI(biosdisk)
 {
   grub_disk_dev_unregister (&grub_biosdisk_dev);
 }
diff -urp grub2/kern/i386/pc/init.c grub2.biosdisk/kern/i386/pc/init.c
--- grub2/kern/i386/pc/init.c	2007-09-07 23:55:26.000000000 +0200
+++ grub2.biosdisk/kern/i386/pc/init.c	2007-10-19 22:00:34.000000000 +0200
@@ -21,7 +21,6 @@
 #include <grub/machine/init.h>
 #include <grub/machine/memory.h>
 #include <grub/machine/console.h>
-#include <grub/machine/biosdisk.h>
 #include <grub/machine/kernel.h>
 #include <grub/types.h>
 #include <grub/err.h>
@@ -226,9 +225,6 @@ grub_machine_init (void)
   
   if (! grub_os_area_addr)
     grub_fatal ("no upper memory");
-  
-  /* The memory system was initialized, thus register built-in devices.  */
-  grub_biosdisk_init ();
 }
 
 void
@@ -241,7 +237,6 @@ grub_machine_set_prefix (void)
 void
 grub_machine_fini (void)
 {
-  grub_biosdisk_fini ();
   grub_console_fini ();
 }
 
diff -urp grub2/util/i386/pc/grub-install.in grub2.biosdisk/util/i386/pc/grub-install.in
--- grub2/util/i386/pc/grub-install.in	2007-07-22 01:32:32.000000000 +0200
+++ grub2.biosdisk/util/i386/pc/grub-install.in	2007-10-19 22:00:34.000000000 +0200
@@ -224,7 +224,7 @@ fi
 partmap_module=`$grub_probe --target=partmap --device-map=${device_map} ${grubdir} 2> /dev/null`
 
 # _chain is often useful
-modules="$modules $fs_module $partmap_module _chain"
+modules="$modules $fs_module $partmap_module biosdisk _chain"
 
 $grub_mkimage --output=${grubdir}/core.img --prefix=`make_system_path_relative_to_its_root ${grubdir}` $modules || exit 1