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authorjulian <julian@FreeBSD.org>1998-01-12 07:47:03 +0000
committerjulian <julian@FreeBSD.org>1998-01-12 07:47:03 +0000
commitf8e5dea18291d1de0e6165c2c114244249314b07 (patch)
tree1ebdb0cf5a2f7b3db8e66f01e31ce1be96da47e1 /share
parent993698cd4d01babe86314a2d0be61c558ba57305 (diff)
downloadFreeBSD-src-f8e5dea18291d1de0e6165c2c114244249314b07.zip
FreeBSD-src-f8e5dea18291d1de0e6165c2c114244249314b07.tar.gz
Add code to the example 'driver-o-matic' to support being an LKM
This may not quite work yet but should head the user in the right direction.
Diffstat (limited to 'share')
-rwxr-xr-xshare/examples/drivers/make_device_driver.sh107
1 files changed, 101 insertions, 6 deletions
diff --git a/share/examples/drivers/make_device_driver.sh b/share/examples/drivers/make_device_driver.sh
index 7d1776d..e824977 100755
--- a/share/examples/drivers/make_device_driver.sh
+++ b/share/examples/drivers/make_device_driver.sh
@@ -2,6 +2,9 @@
# This writes a skeleton driver and puts it into the kernel tree for you
#arg1 is lowercase "foo"
#
+# It also creates a directory under /usr/src/lkm to help you create
+#loadable kernel modules, though without much use except for development.
+#
# Trust me, RUN THIS SCRIPT :)
#
#-------cut here------------------
@@ -13,6 +16,11 @@ then
exit 1
fi
+if [ -d /usr/src/lkm ]
+then
+ mkdir /usr/src/lkm/${1}
+fi
+
UPPER=`echo ${1} |tr "[:lower:]" "[:upper:]"`
cat >files.${UPPER} <<DONE
i386/isa/${1}.c optional ${1} device-driver
@@ -21,7 +29,7 @@ DONE
cat >${UPPER} <<DONE
# Configuration file for kernel type: ${UPPER}
ident ${UPPER}
-# \$Id: make_device_driver.sh,v 1.1 1997/02/02 07:19:30 julian Exp $"
+# \$Id: make_device_driver.sh,v 1.2 1997/12/30 03:23:12 julian Exp $"
DONE
grep -v GENERIC < GENERIC >>${UPPER}
@@ -37,7 +45,7 @@ cat >../isa/${1}.c <<DONE
* Copyright ME
*
* ${1} driver
- * \$Id: make_device_driver.sh,v 1.1 1997/02/02 07:19:30 julian Exp $
+ * \$Id: make_device_driver.sh,v 1.2 1997/12/30 03:23:12 julian Exp $
*/
@@ -67,7 +75,9 @@ static d_mmap_t ${1}mmap;
static d_poll_t ${1}poll;
static int ${1}probe (struct isa_device *);
static int ${1}attach (struct isa_device *);
-/* void ${1}intr(int unit);*//* actually defined in ioconf.h (generated file) */
+#ifdef ${UPPER}_MODULE
+void ${1}intr(int unit); /* actually defined in ioconf.h (generated file) */
+#endif
#define CDEV_MAJOR 20
static struct cdevsw ${1}_cdevsw = {
@@ -340,9 +350,12 @@ ${1}poll(dev_t dev, int which, struct proc *p)
return (0); /* this is the wrong value I'm sure */
}
+#ifndef ${UPPER}_MODULE
+
/*
* Now for some driver initialisation.
* Occurs ONCE during boot (very early).
+ * This is if we are NOT a loadable module.
*/
static void
${1}_drvinit(void *unused)
@@ -356,6 +369,52 @@ ${1}_drvinit(void *unused)
SYSINIT(${1}dev, SI_SUB_DRIVERS, SI_ORDER_MIDDLE+CDEV_MAJOR,
${1}_drvinit, NULL)
+#else /* ${UPPER}_MODULE */
+/* Here is the support for if we ARE a loadable kernel module */
+
+#include <sys/exec.h>
+#include <sys/sysent.h>
+#include <sys/lkm.h>
+
+MOD_DEV (${1}, LM_DT_CHAR, CDEV_MAJOR, &${1}_cdevsw);
+
+static struct isa_device dev = {0, &${1}driver, BASE_IO, IRQ, DMA, (caddr_t) PHYS_IO, PHYS_IO_SIZE, INT_INT, 0, FLAGS, 0, 0, 0, 0, 1, 0, 0};
+
+static int
+${1}_load (struct lkm_table *lkmtp, int cmd)
+{
+ if (${1}probe (&dev)) {
+ ${1}attach (&dev);
+ uprintf ("${1} driver loaded\n");
+ uprintf ("${1}: interrupts not hooked\n");
+ return 0;
+ } else {
+ uprintf ("${1} driver: probe failed\n");
+ return 1;
+ }
+}
+
+static int
+${1}_unload (struct lkm_table *lkmtp, int cmd)
+{
+ uprintf ("${1} driver unloaded\n");
+ return 0;
+}
+
+static int
+${1}_stat (struct lkm_table *lkmtp, int cmd)
+{
+ return 0;
+}
+
+int
+${1}_mod (struct lkm_table *lkmtp, int cmd, int ver)
+{
+ MOD_DISPATCH(${1}, lkmtp, cmd, ver,
+ ${1}_load, ${1}_unload, ${1}_stat);
+}
+
+#endif /* ${UPPER}_MODULE */
DONE
@@ -379,6 +438,45 @@ cat >../../sys/${1}io.h <<DONE
#endif
DONE
+if [ -d /usr/src/lkm/${1} ]
+then
+ cat >/usr/src/lkm/${1}/Makefile <<DONE
+# ${UPPER} Loadable Kernel Module
+#
+# This happens not to work, actually. It's written for
+# a character ISA device driver, but they cannot be
+# be made into lkm's, because you have to hard code
+# everything you'll otherwise enter into the kernel
+# configuration file.
+
+.PATH: \${.CURDIR}/../../sys/i386/isa
+KMOD = ${1}_mod
+SRCS = ${1}.c ${1}.h
+
+CFLAGS += -I. -D${UPPER}_MODULE
+CLEANFILES += ${1}.h
+
+BASE_IO=0 # Base IO address
+IRQ=0 # IRQ number
+DMA=-1 # DMA channel
+PHYS_IO=0 # Physical IO Memory base address
+PHYS_IO_SIZE=0 # Physical IO Memory size
+INT_INT=0 # Interrupt interface
+FLAGS=0 # Flags
+
+CFLAGS+= -DBASE_IO=\${BASE_IO} -DIRQ=\${IRQ} -DDMA=\${DMA} -DPHYS_IO=\${PHYS_IO} -DPHYS_IO_SIZE=\${PHYS_IO_SIZE} -DINT_INT=\${INT_INT} -DFLAGS=\${FLAGS}
+
+${1}.h:
+ echo "#define N${UPPER} 1" > ${1}.h
+
+afterinstall:
+ \${INSTALL} -c -o \${BINOWN} -g \${BINGRP} -m \${BINMODE} \
+ \${.CURDIR}/${1} \${DESTDIR}/usr/bin
+
+.include <bsd.kmod.mk>
+DONE
+fi
+
config ${UPPER}
cd ../../compile/${UPPER}
make depend
@@ -388,9 +486,6 @@ exit
#--------------end of script---------------
#
-#you also need to add an entry into the cdevsw[]
-#array in conf.c, but it's too hard to do in a script..
-#
#edit to your taste..
#
#
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