Author: br
Date: Wed Oct 22 11:30:03 2014
New Revision: 273469
URL: https://svnweb.freebsd.org/changeset/base/273469
Log:
Provide a character device allowing us to access BERI memory regions.
Sponsored by: DARPA, AFRL
Added:
head/sys/dev/beri/beri_mem.c (contents, props changed)
Modified:
head/sys/arm/altera/socfpga/files.socfpga
head/sys/arm/conf/SOCKIT-BERI
head/sys/boot/fdt/dts/arm/socfpga-sockit-beri.dts
Modified: head/sys/arm/altera/socfpga/files.socfpga
==============================================================================
--- head/sys/arm/altera/socfpga/files.socfpga Wed Oct 22 11:09:03 2014
(r273468)
+++ head/sys/arm/altera/socfpga/files.socfpga Wed Oct 22 11:30:03 2014
(r273469)
@@ -22,4 +22,7 @@ arm/altera/socfpga/socfpga_mp.c option
dev/dwc/if_dwc.c optional dwc
dev/mii/micphy.c optional micphy
dev/mmc/host/dwmmc.c optional dwmmc
+
+# BERI specific
dev/beri/beri_ring.c optional beri_ring
+dev/beri/beri_mem.c optional beri_mem
Modified: head/sys/arm/conf/SOCKIT-BERI
==============================================================================
--- head/sys/arm/conf/SOCKIT-BERI Wed Oct 22 11:09:03 2014
(r273468)
+++ head/sys/arm/conf/SOCKIT-BERI Wed Oct 22 11:30:03 2014
(r273469)
@@ -121,6 +121,7 @@ device spibus
# BERI specific
device beri_ring
+device beri_mem
# Ethernet
device ether
Modified: head/sys/boot/fdt/dts/arm/socfpga-sockit-beri.dts
==============================================================================
--- head/sys/boot/fdt/dts/arm/socfpga-sockit-beri.dts Wed Oct 22 11:09:03
2014 (r273468)
+++ head/sys/boot/fdt/dts/arm/socfpga-sockit-beri.dts Wed Oct 22 11:30:03
2014 (r273469)
@@ -81,6 +81,12 @@
};
};
+ beri_mem: mem@d0000000 {
+ compatible = "sri-cambridge,beri-mem";
+ reg = <0xd0000000 0x10000000>;
+ status = "okay";
+ };
+
beri_debug: ring@c0000000 {
compatible = "sri-cambridge,beri-ring";
reg = <0xc0000000 0x3000>;
Added: head/sys/dev/beri/beri_mem.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/dev/beri/beri_mem.c Wed Oct 22 11:30:03 2014
(r273469)
@@ -0,0 +1,186 @@
+/*-
+ * Copyright (c) 2014 Ruslan Bukin <b...@bsdpad.com>
+ * All rights reserved.
+ *
+ * This software was developed by SRI International and the University of
+ * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
+ * ("CTSRD"), as part of the DARPA CRASH research programme.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * BERI memory interface.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/malloc.h>
+#include <sys/rman.h>
+#include <sys/timeet.h>
+#include <sys/timetc.h>
+#include <sys/conf.h>
+#include <sys/uio.h>
+
+#include <dev/fdt/fdt_common.h>
+#include <dev/ofw/openfirm.h>
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+
+#include <machine/bus.h>
+#include <machine/fdt.h>
+#include <machine/cpu.h>
+#include <machine/intr.h>
+
+struct beri_mem_softc {
+ struct resource *res[1];
+ struct cdev *mem_cdev;
+ device_t dev;
+ int mem_size;
+ int mem_start;
+};
+
+static struct resource_spec beri_mem_spec[] = {
+ { SYS_RES_MEMORY, 0, RF_ACTIVE },
+ { -1, 0 }
+};
+
+static int
+mem_open(struct cdev *dev, int flags __unused,
+ int fmt __unused, struct thread *td __unused)
+{
+ struct beri_mem_softc *sc;
+
+ sc = dev->si_drv1;
+
+ return (0);
+}
+
+static int
+mem_close(struct cdev *dev, int flags __unused,
+ int fmt __unused, struct thread *td __unused)
+{
+ struct beri_mem_softc *sc;
+
+ sc = dev->si_drv1;
+
+ return (0);
+}
+
+static int
+mem_ioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flags,
+ struct thread *td)
+{
+
+ return (0);
+}
+
+static int
+mem_mmap(struct cdev *dev, vm_ooffset_t offset, vm_paddr_t *paddr, int nprot,
+ vm_memattr_t *memattr)
+{
+ struct beri_mem_softc *sc;
+
+ sc = dev->si_drv1;
+
+ if (offset < sc->mem_size) {
+ *paddr = sc->mem_start + offset;
+ return (0);
+ }
+
+ return (EINVAL);
+}
+
+static struct cdevsw mem_cdevsw = {
+ .d_version = D_VERSION,
+ .d_open = mem_open,
+ .d_close = mem_close,
+ .d_ioctl = mem_ioctl,
+ .d_mmap = mem_mmap,
+ .d_name = "BERI memory",
+};
+
+static int
+beri_mem_probe(device_t dev)
+{
+
+ if (!ofw_bus_status_okay(dev))
+ return (ENXIO);
+
+ if (!ofw_bus_is_compatible(dev, "sri-cambridge,beri-mem"))
+ return (ENXIO);
+
+ device_set_desc(dev, "BERI memory");
+ return (BUS_PROBE_DEFAULT);
+}
+
+static int
+beri_mem_attach(device_t dev)
+{
+ struct beri_mem_softc *sc;
+
+ sc = device_get_softc(dev);
+ sc->dev = dev;
+
+ if (bus_alloc_resources(dev, beri_mem_spec, sc->res)) {
+ device_printf(dev, "could not allocate resources\n");
+ return (ENXIO);
+ }
+
+ /* Memory info */
+ sc->mem_size = rman_get_size(sc->res[0]);
+ sc->mem_start = rman_get_start(sc->res[0]);
+
+ sc->mem_cdev = make_dev(&mem_cdevsw, 0, UID_ROOT, GID_WHEEL,
+ 0600, "beri_mem");
+
+ if (sc->mem_cdev == NULL) {
+ device_printf(dev, "Failed to create character device.\n");
+ return (ENXIO);
+ }
+
+ sc->mem_cdev->si_drv1 = sc;
+
+ return (0);
+}
+
+static device_method_t beri_mem_methods[] = {
+ DEVMETHOD(device_probe, beri_mem_probe),
+ DEVMETHOD(device_attach, beri_mem_attach),
+ { 0, 0 }
+};
+
+static driver_t beri_mem_driver = {
+ "beri_mem",
+ beri_mem_methods,
+ sizeof(struct beri_mem_softc),
+};
+
+static devclass_t beri_mem_devclass;
+
+DRIVER_MODULE(beri_mem, simplebus, beri_mem_driver, beri_mem_devclass, 0, 0);
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