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.
This commit is contained in:
Julian Elischer
parent
34bda5731d
commit
4308b69579
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@ -2,6 +2,9 @@
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# This writes a skeleton driver and puts it into the kernel tree for you
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#arg1 is lowercase "foo"
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#
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# It also creates a directory under /usr/src/lkm to help you create
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#loadable kernel modules, though without much use except for development.
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#
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# Trust me, RUN THIS SCRIPT :)
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#
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#-------cut here------------------
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@ -13,6 +16,11 @@ then
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exit 1
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fi
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if [ -d /usr/src/lkm ]
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then
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mkdir /usr/src/lkm/${1}
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fi
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UPPER=`echo ${1} |tr "[:lower:]" "[:upper:]"`
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cat >files.${UPPER} <<DONE
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i386/isa/${1}.c optional ${1} device-driver
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@ -21,7 +29,7 @@ DONE
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cat >${UPPER} <<DONE
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# Configuration file for kernel type: ${UPPER}
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ident ${UPPER}
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# \$Id: make_device_driver.sh,v 1.1 1997/02/02 07:19:30 julian Exp $"
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# \$Id: make_device_driver.sh,v 1.2 1997/12/30 03:23:12 julian Exp $"
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DONE
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grep -v GENERIC < GENERIC >>${UPPER}
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@ -37,7 +45,7 @@ cat >../isa/${1}.c <<DONE
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* Copyright ME
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*
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* ${1} driver
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* \$Id: make_device_driver.sh,v 1.1 1997/02/02 07:19:30 julian Exp $
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* \$Id: make_device_driver.sh,v 1.2 1997/12/30 03:23:12 julian Exp $
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*/
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@ -67,7 +75,9 @@ static d_mmap_t ${1}mmap;
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static d_poll_t ${1}poll;
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static int ${1}probe (struct isa_device *);
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static int ${1}attach (struct isa_device *);
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/* void ${1}intr(int unit);*//* actually defined in ioconf.h (generated file) */
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#ifdef ${UPPER}_MODULE
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void ${1}intr(int unit); /* actually defined in ioconf.h (generated file) */
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#endif
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#define CDEV_MAJOR 20
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static struct cdevsw ${1}_cdevsw = {
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@ -340,9 +350,12 @@ ${1}poll(dev_t dev, int which, struct proc *p)
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return (0); /* this is the wrong value I'm sure */
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}
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#ifndef ${UPPER}_MODULE
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/*
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* Now for some driver initialisation.
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* Occurs ONCE during boot (very early).
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* This is if we are NOT a loadable module.
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*/
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static void
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${1}_drvinit(void *unused)
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@ -356,6 +369,52 @@ ${1}_drvinit(void *unused)
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SYSINIT(${1}dev, SI_SUB_DRIVERS, SI_ORDER_MIDDLE+CDEV_MAJOR,
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${1}_drvinit, NULL)
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#else /* ${UPPER}_MODULE */
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/* Here is the support for if we ARE a loadable kernel module */
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#include <sys/exec.h>
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#include <sys/sysent.h>
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#include <sys/lkm.h>
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MOD_DEV (${1}, LM_DT_CHAR, CDEV_MAJOR, &${1}_cdevsw);
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static struct isa_device dev = {0, &${1}driver, BASE_IO, IRQ, DMA, (caddr_t) PHYS_IO, PHYS_IO_SIZE, INT_INT, 0, FLAGS, 0, 0, 0, 0, 1, 0, 0};
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static int
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${1}_load (struct lkm_table *lkmtp, int cmd)
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{
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if (${1}probe (&dev)) {
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${1}attach (&dev);
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uprintf ("${1} driver loaded\n");
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uprintf ("${1}: interrupts not hooked\n");
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return 0;
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} else {
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uprintf ("${1} driver: probe failed\n");
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return 1;
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}
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}
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static int
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${1}_unload (struct lkm_table *lkmtp, int cmd)
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{
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uprintf ("${1} driver unloaded\n");
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return 0;
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}
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static int
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${1}_stat (struct lkm_table *lkmtp, int cmd)
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{
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return 0;
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}
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int
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${1}_mod (struct lkm_table *lkmtp, int cmd, int ver)
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{
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MOD_DISPATCH(${1}, lkmtp, cmd, ver,
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${1}_load, ${1}_unload, ${1}_stat);
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}
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#endif /* ${UPPER}_MODULE */
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DONE
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@ -379,6 +438,45 @@ cat >../../sys/${1}io.h <<DONE
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#endif
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DONE
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if [ -d /usr/src/lkm/${1} ]
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then
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cat >/usr/src/lkm/${1}/Makefile <<DONE
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# ${UPPER} Loadable Kernel Module
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#
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# This happens not to work, actually. It's written for
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# a character ISA device driver, but they cannot be
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# be made into lkm's, because you have to hard code
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# everything you'll otherwise enter into the kernel
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# configuration file.
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.PATH: \${.CURDIR}/../../sys/i386/isa
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KMOD = ${1}_mod
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SRCS = ${1}.c ${1}.h
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CFLAGS += -I. -D${UPPER}_MODULE
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CLEANFILES += ${1}.h
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BASE_IO=0 # Base IO address
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IRQ=0 # IRQ number
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DMA=-1 # DMA channel
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PHYS_IO=0 # Physical IO Memory base address
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PHYS_IO_SIZE=0 # Physical IO Memory size
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INT_INT=0 # Interrupt interface
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FLAGS=0 # Flags
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CFLAGS+= -DBASE_IO=\${BASE_IO} -DIRQ=\${IRQ} -DDMA=\${DMA} -DPHYS_IO=\${PHYS_IO} -DPHYS_IO_SIZE=\${PHYS_IO_SIZE} -DINT_INT=\${INT_INT} -DFLAGS=\${FLAGS}
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${1}.h:
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echo "#define N${UPPER} 1" > ${1}.h
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afterinstall:
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\${INSTALL} -c -o \${BINOWN} -g \${BINGRP} -m \${BINMODE} \
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\${.CURDIR}/${1} \${DESTDIR}/usr/bin
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.include <bsd.kmod.mk>
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DONE
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fi
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config ${UPPER}
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cd ../../compile/${UPPER}
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make depend
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@ -388,9 +486,6 @@ exit
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#--------------end of script---------------
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#
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#you also need to add an entry into the cdevsw[]
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#array in conf.c, but it's too hard to do in a script..
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#
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#edit to your taste..
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#
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#
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