[MIPS] Add support for BCM47XX CPUs.

Note that the BCM4710 does not support the wait instruction, this
is not a mistake in the code.
    
It originally comes from the OpenWrt patches.
    
Cc: Michael Buesch <mb@bu3sch.de>
Cc: Felix Fietkau <nbd@openwrt.org>
Cc: Florian Schirmer <jolt@tuxbox.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 79 insertions, 0 deletions

diff --git a/arch/mips/bcm47xx/setup.c b/arch/mips/bcm47xx/setup.c
new file mode 100644
index 000000000000..dfc580aae958
--- /dev/null
+++ b/arch/mips/bcm47xx/setup.c
@@ -0,0 +1,79 @@
+/*
+ *  Copyright (C) 2004 Florian Schirmer <jolt@tuxbox.org>
+ *  Copyright (C) 2005 Waldemar Brodkorb <wbx@openwrt.org>
+ *  Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org>
+ *  Copyright (C) 2006 Michael Buesch <mb@bu3sch.de>
+ *
+ *  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  SOFTWARE  IS PROVIDED   ``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  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.
+ *
+ *  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.
+ */
+
+#include <linux/types.h>
+#include <linux/ssb/ssb.h>
+#include <asm/reboot.h>
+#include <asm/time.h>
+#include <bcm47xx.h>
+
+struct ssb_bus ssb_bcm47xx;
+EXPORT_SYMBOL(ssb_bcm47xx);
+
+static void bcm47xx_machine_restart(char *command)
+{
+        printk(KERN_ALERT "Please stand by while rebooting the system...\n");
+        local_irq_disable();
+        /* Set the watchdog timer to reset immediately */
+        ssb_chipco_watchdog_timer_set(&ssb_bcm47xx.chipco, 1);
+        while (1)
+                cpu_relax();
+}
+
+static void bcm47xx_machine_halt(void)
+{
+        /* Disable interrupts and watchdog and spin forever */
+        local_irq_disable();
+        ssb_chipco_watchdog_timer_set(&ssb_bcm47xx.chipco, 0);
+        while (1)
+                cpu_relax();
+}
+
+static int bcm47xx_get_invariants(struct ssb_bus *bus,
+                                   struct ssb_init_invariants *iv)
+{
+        /* TODO: fill ssb_init_invariants using boardtype/boardrev
+         * CFE environment variables.
+         */
+        return 0;
+}
+
+void __init plat_mem_setup(void)
+{
+        int err;
+
+        err = ssb_bus_ssbbus_register(&ssb_bcm47xx, SSB_ENUM_BASE,
+                                      bcm47xx_get_invariants);
+        if (err)
+                panic("Failed to initialize SSB bus (err %d)\n", err);
+
+        _machine_restart = bcm47xx_machine_restart;
+        _machine_halt = bcm47xx_machine_halt;
+        pm_power_off = bcm47xx_machine_halt;
+        board_time_init = bcm47xx_time_init;
+}
+