Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 167 insertions, 0 deletions

diff --git a/arch/mips/pmc-sierra/yosemite/irq.c b/arch/mips/pmc-sierra/yosemite/irq.c
new file mode 100644
index 000000000000..f4e2897d9bf7
--- /dev/null
+++ b/arch/mips/pmc-sierra/yosemite/irq.c
@@ -0,0 +1,167 @@
+/*
+ * Copyright (C) 2003 PMC-Sierra Inc.
+ * Author: Manish Lachwani (lachwani@pmc-sierra.com)
+ *
+ *  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.
+ *
+ * Second level Interrupt handlers for the PMC-Sierra Titan/Yosemite board
+ */
+#include <linux/config.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/kernel_stat.h>
+#include <linux/module.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/irq.h>
+#include <linux/timex.h>
+#include <linux/slab.h>
+#include <linux/random.h>
+#include <linux/bitops.h>
+#include <asm/bootinfo.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/irq_cpu.h>
+#include <asm/mipsregs.h>
+#include <asm/system.h>
+#include <asm/titan_dep.h>
+
+/* Hypertransport specific */
+#define IRQ_ACK_BITS            0x00000000      /* Ack bits */
+
+#define HYPERTRANSPORT_INTA     0x78            /* INTA# */
+#define HYPERTRANSPORT_INTB     0x79            /* INTB# */
+#define HYPERTRANSPORT_INTC     0x7a            /* INTC# */
+#define HYPERTRANSPORT_INTD     0x7b            /* INTD# */
+
+extern asmlinkage void titan_handle_int(void);
+extern void jaguar_mailbox_irq(struct pt_regs *);
+
+/*
+ * Handle hypertransport & SMP interrupts. The interrupt lines are scarce.
+ * For interprocessor interrupts, the best thing to do is to use the INTMSG
+ * register. We use the same external interrupt line, i.e. INTB3 and monitor
+ * another status bit
+ */
+asmlinkage void ll_ht_smp_irq_handler(int irq, struct pt_regs *regs)
+{
+        u32 status = OCD_READ(RM9000x2_OCD_INTP0STATUS4);
+
+        /* Ack all the bits that correspond to the interrupt sources */
+        if (status != 0)
+                OCD_WRITE(RM9000x2_OCD_INTP0STATUS4, IRQ_ACK_BITS);
+
+        status = OCD_READ(RM9000x2_OCD_INTP1STATUS4);
+        if (status != 0)
+                OCD_WRITE(RM9000x2_OCD_INTP1STATUS4, IRQ_ACK_BITS);
+
+#ifdef CONFIG_HT_LEVEL_TRIGGER
+        /*
+         * Level Trigger Mode only. Send the HT EOI message back to the source.
+         */
+        switch (status) {
+        case 0x1000000:
+                OCD_WRITE(RM9000x2_OCD_HTEOI, HYPERTRANSPORT_INTA);
+                break;
+        case 0x2000000:
+                OCD_WRITE(RM9000x2_OCD_HTEOI, HYPERTRANSPORT_INTB);
+                break;
+        case 0x4000000:
+                OCD_WRITE(RM9000x2_OCD_HTEOI, HYPERTRANSPORT_INTC);
+                break;
+        case 0x8000000:
+                OCD_WRITE(RM9000x2_OCD_HTEOI, HYPERTRANSPORT_INTD);
+                break;
+        case 0x0000001:
+                /* PLX */
+                OCD_WRITE(RM9000x2_OCD_HTEOI, 0x20);
+                OCD_WRITE(IRQ_CLEAR_REG, IRQ_ACK_BITS);
+                break;
+        case 0xf000000:
+                OCD_WRITE(RM9000x2_OCD_HTEOI, HYPERTRANSPORT_INTA);
+                OCD_WRITE(RM9000x2_OCD_HTEOI, HYPERTRANSPORT_INTB);
+                OCD_WRITE(RM9000x2_OCD_HTEOI, HYPERTRANSPORT_INTC);
+                OCD_WRITE(RM9000x2_OCD_HTEOI, HYPERTRANSPORT_INTD);
+                break;
+        }
+#endif /* CONFIG_HT_LEVEL_TRIGGER */
+
+        do_IRQ(irq, regs);
+}
+
+asmlinkage void do_extended_irq(struct pt_regs *regs)
+{
+        unsigned int intcontrol = read_c0_intcontrol();
+        unsigned int cause = read_c0_cause();
+        unsigned int status = read_c0_status();
+        unsigned int pending_sr, pending_ic;
+
+        pending_sr = status & cause & 0xff00;
+        pending_ic = (cause >> 8) & intcontrol & 0xff00;
+
+        if (pending_ic & (1 << 13))
+                do_IRQ(13, regs);
+
+}
+
+#ifdef CONFIG_KGDB
+extern void init_second_port(void);
+#endif
+
+/*
+ * Initialize the next level interrupt handler
+ */
+void __init arch_init_irq(void)
+{
+        clear_c0_status(ST0_IM);
+
+        set_except_vector(0, titan_handle_int);
+        mips_cpu_irq_init(0);
+        rm7k_cpu_irq_init(8);
+        rm9k_cpu_irq_init(12);
+
+#ifdef CONFIG_KGDB
+        /* At this point, initialize the second serial port */
+        init_second_port();
+#endif
+
+#ifdef CONFIG_GDB_CONSOLE
+        register_gdb_console();
+#endif
+}
+
+#ifdef CONFIG_KGDB
+/*
+ * The 16550 DUART has two ports, but is allocated one IRQ
+ * for the serial console. Hence, a generic framework for
+ * serial IRQ routing in place. Currently, just calls the
+ * do_IRQ fuction. But, going in the future, need to check
+ * DUART registers for channel A and B, then decide the
+ * appropriate action
+ */
+asmlinkage void yosemite_kgdb_irq(int irq, struct pt_regs *regs)
+{
+        do_IRQ(irq, regs);
+}
+#endif