Add support for BCM1480 family of chips.

    
 - Kconfig and Makefile changes
 - arch/mips/sibyte/bcm1480/
 - changes to sibyte common code to support 1480
    
Signed-Off-By: Andy Isaacson <adi@broadcom.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

9 files changed, 1080 insertions, 2 deletions

diff --git a/arch/mips/sibyte/Kconfig b/arch/mips/sibyte/Kconfig
index 3618d61f004a..6a5a08f5e212 100644
--- a/arch/mips/sibyte/Kconfig
+++ b/arch/mips/sibyte/Kconfig
@@ -26,6 +26,16 @@ config SIBYTE_BCM112X
         bool
         select SIBYTE_SB1xxx_SOC
 
+config SIBYTE_BCM1x80
+        bool
+        select HW_HAS_PCI
+        select SIBYTE_SB1xxx_SOC
+
+config SIBYTE_BCM1x55
+        bool
+        select HW_HAS_PCI
+        select SIBYTE_SB1xxx_SOC
+
 config SIBYTE_SB1xxx_SOC
         bool
         depends on EXPERIMENTAL
diff --git a/arch/mips/sibyte/bcm1480/Makefile b/arch/mips/sibyte/bcm1480/Makefile
new file mode 100644
index 000000000000..538d5a51ae94
--- /dev/null
+++ b/arch/mips/sibyte/bcm1480/Makefile
@@ -0,0 +1,5 @@
+obj-y := setup.o irq.o irq_handler.o time.o
+
+obj-$(CONFIG_SMP)                       += smp.o
+
+EXTRA_AFLAGS := $(CFLAGS)
diff --git a/arch/mips/sibyte/bcm1480/irq.c b/arch/mips/sibyte/bcm1480/irq.c
new file mode 100644
index 000000000000..b2a1ba5d23df
--- /dev/null
+++ b/arch/mips/sibyte/bcm1480/irq.c
@@ -0,0 +1,476 @@
+/*
+ * Copyright (C) 2000,2001,2002,2003,2004 Broadcom Corporation
+ *
+ * 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 program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/linkage.h>
+#include <linux/interrupt.h>
+#include <linux/spinlock.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/kernel_stat.h>
+
+#include <asm/errno.h>
+#include <asm/signal.h>
+#include <asm/system.h>
+#include <asm/ptrace.h>
+#include <asm/io.h>
+
+#include <asm/sibyte/bcm1480_regs.h>
+#include <asm/sibyte/bcm1480_int.h>
+#include <asm/sibyte/bcm1480_scd.h>
+
+#include <asm/sibyte/sb1250_uart.h>
+#include <asm/sibyte/sb1250.h>
+
+/*
+ * These are the routines that handle all the low level interrupt stuff.
+ * Actions handled here are: initialization of the interrupt map, requesting of
+ * interrupt lines by handlers, dispatching if interrupts to handlers, probing
+ * for interrupt lines
+ */
+
+
+#define shutdown_bcm1480_irq    disable_bcm1480_irq
+static void end_bcm1480_irq(unsigned int irq);
+static void enable_bcm1480_irq(unsigned int irq);
+static void disable_bcm1480_irq(unsigned int irq);
+static unsigned int startup_bcm1480_irq(unsigned int irq);
+static void ack_bcm1480_irq(unsigned int irq);
+#ifdef CONFIG_SMP
+static void bcm1480_set_affinity(unsigned int irq, cpumask_t mask);
+#endif
+
+#ifdef CONFIG_PCI
+extern unsigned long ht_eoi_space;
+#endif
+
+#ifdef CONFIG_KGDB
+#include <asm/gdb-stub.h>
+extern void breakpoint(void);
+static int kgdb_irq;
+#ifdef CONFIG_GDB_CONSOLE
+extern void register_gdb_console(void);
+#endif
+
+/* kgdb is on when configured.  Pass "nokgdb" kernel arg to turn it off */
+static int kgdb_flag = 1;
+static int __init nokgdb(char *str)
+{
+        kgdb_flag = 0;
+        return 1;
+}
+__setup("nokgdb", nokgdb);
+
+/* Default to UART1 */
+int kgdb_port = 1;
+#ifdef CONFIG_SIBYTE_SB1250_DUART
+extern char sb1250_duart_present[];
+#endif
+#endif
+
+static struct hw_interrupt_type bcm1480_irq_type = {
+        .typename = "BCM1480-IMR",
+        .startup = startup_bcm1480_irq,
+        .shutdown = shutdown_bcm1480_irq,
+        .enable = enable_bcm1480_irq,
+        .disable = disable_bcm1480_irq,
+        .ack = ack_bcm1480_irq,
+        .end = end_bcm1480_irq,
+#ifdef CONFIG_SMP
+        .set_affinity = bcm1480_set_affinity
+#endif
+};
+
+/* Store the CPU id (not the logical number) */
+int bcm1480_irq_owner[BCM1480_NR_IRQS];
+
+DEFINE_SPINLOCK(bcm1480_imr_lock);
+
+void bcm1480_mask_irq(int cpu, int irq)
+{
+        unsigned long flags;
+        u64 cur_ints,hl_spacing;
+
+        spin_lock_irqsave(&bcm1480_imr_lock, flags);
+        hl_spacing = 0;
+        if ((irq >= BCM1480_NR_IRQS_HALF) && (irq <= BCM1480_NR_IRQS)) {
+                hl_spacing = BCM1480_IMR_HL_SPACING;
+                irq -= BCM1480_NR_IRQS_HALF;
+        }
+        cur_ints = ____raw_readq(IOADDR(A_BCM1480_IMR_MAPPER(cpu) + R_BCM1480_IMR_INTERRUPT_MASK_H + hl_spacing));
+        cur_ints |= (((u64) 1) << irq);
+        ____raw_writeq(cur_ints, IOADDR(A_BCM1480_IMR_MAPPER(cpu) + R_BCM1480_IMR_INTERRUPT_MASK_H + hl_spacing));
+        spin_unlock_irqrestore(&bcm1480_imr_lock, flags);
+}
+
+void bcm1480_unmask_irq(int cpu, int irq)
+{
+        unsigned long flags;
+        u64 cur_ints,hl_spacing;
+
+        spin_lock_irqsave(&bcm1480_imr_lock, flags);
+        hl_spacing = 0;
+        if ((irq >= BCM1480_NR_IRQS_HALF) && (irq <= BCM1480_NR_IRQS)) {
+                hl_spacing = BCM1480_IMR_HL_SPACING;
+                irq -= BCM1480_NR_IRQS_HALF;
+        }
+        cur_ints = ____raw_readq(IOADDR(A_BCM1480_IMR_MAPPER(cpu) + R_BCM1480_IMR_INTERRUPT_MASK_H + hl_spacing));
+        cur_ints &= ~(((u64) 1) << irq);
+        ____raw_writeq(cur_ints, IOADDR(A_BCM1480_IMR_MAPPER(cpu) + R_BCM1480_IMR_INTERRUPT_MASK_H + hl_spacing));
+        spin_unlock_irqrestore(&bcm1480_imr_lock, flags);
+}
+
+#ifdef CONFIG_SMP
+static void bcm1480_set_affinity(unsigned int irq, cpumask_t mask)
+{
+        int i = 0, old_cpu, cpu, int_on;
+        u64 cur_ints;
+        irq_desc_t *desc = irq_desc + irq;
+        unsigned long flags;
+        unsigned int irq_dirty;
+
+        i = first_cpu(mask);
+        if (next_cpu(i, mask) <= NR_CPUS) {
+                printk("attempted to set irq affinity for irq %d to multiple CPUs\n", irq);
+                return;
+        }
+
+        /* Convert logical CPU to physical CPU */
+        cpu = cpu_logical_map(i);
+
+        /* Protect against other affinity changers and IMR manipulation */
+        spin_lock_irqsave(&desc->lock, flags);
+        spin_lock(&bcm1480_imr_lock);
+
+        /* Swizzle each CPU's IMR (but leave the IP selection alone) */
+        old_cpu = bcm1480_irq_owner[irq];
+        irq_dirty = irq;
+        if ((irq_dirty >= BCM1480_NR_IRQS_HALF) && (irq_dirty <= BCM1480_NR_IRQS)) {
+                irq_dirty -= BCM1480_NR_IRQS_HALF;
+        }
+
+        int k;
+        for (k=0; k<2; k++) { /* Loop through high and low interrupt mask register */
+                cur_ints = ____raw_readq(IOADDR(A_BCM1480_IMR_MAPPER(old_cpu) + R_BCM1480_IMR_INTERRUPT_MASK_H + (k*BCM1480_IMR_HL_SPACING)));
+                int_on = !(cur_ints & (((u64) 1) << irq_dirty));
+                if (int_on) {
+                        /* If it was on, mask it */
+                        cur_ints |= (((u64) 1) << irq_dirty);
+                        ____raw_writeq(cur_ints, IOADDR(A_BCM1480_IMR_MAPPER(old_cpu) + R_BCM1480_IMR_INTERRUPT_MASK_H + (k*BCM1480_IMR_HL_SPACING)));
+                }
+                bcm1480_irq_owner[irq] = cpu;
+                if (int_on) {
+                        /* unmask for the new CPU */
+                        cur_ints = ____raw_readq(IOADDR(A_BCM1480_IMR_MAPPER(cpu) + R_BCM1480_IMR_INTERRUPT_MASK_H + (k*BCM1480_IMR_HL_SPACING)));
+                        cur_ints &= ~(((u64) 1) << irq_dirty);
+                        ____raw_writeq(cur_ints, IOADDR(A_BCM1480_IMR_MAPPER(cpu) + R_BCM1480_IMR_INTERRUPT_MASK_H + (k*BCM1480_IMR_HL_SPACING)));
+                }
+        }
+        spin_unlock(&bcm1480_imr_lock);
+        spin_unlock_irqrestore(&desc->lock, flags);
+}
+#endif
+
+
+/* Defined in arch/mips/sibyte/bcm1480/irq_handler.S */
+extern void bcm1480_irq_handler(void);
+
+/*****************************************************************************/
+
+static unsigned int startup_bcm1480_irq(unsigned int irq)
+{
+        bcm1480_unmask_irq(bcm1480_irq_owner[irq], irq);
+
+        return 0;               /* never anything pending */
+}
+
+
+static void disable_bcm1480_irq(unsigned int irq)
+{
+        bcm1480_mask_irq(bcm1480_irq_owner[irq], irq);
+}
+
+static void enable_bcm1480_irq(unsigned int irq)
+{
+        bcm1480_unmask_irq(bcm1480_irq_owner[irq], irq);
+}
+
+
+static void ack_bcm1480_irq(unsigned int irq)
+{
+        u64 pending;
+        unsigned int irq_dirty;
+
+        /*
+         * If the interrupt was an HT interrupt, now is the time to
+         * clear it.  NOTE: we assume the HT bridge was set up to
+         * deliver the interrupts to all CPUs (which makes affinity
+         * changing easier for us)
+         */
+        irq_dirty = irq;
+        if ((irq_dirty >= BCM1480_NR_IRQS_HALF) && (irq_dirty <= BCM1480_NR_IRQS)) {
+                irq_dirty -= BCM1480_NR_IRQS_HALF;
+        }
+        int k;
+        for (k=0; k<2; k++) { /* Loop through high and low LDT interrupts */
+                pending = __raw_readq(IOADDR(A_BCM1480_IMR_REGISTER(bcm1480_irq_owner[irq],
+                                                R_BCM1480_IMR_LDT_INTERRUPT_H + (k*BCM1480_IMR_HL_SPACING))));
+                pending &= ((u64)1 << (irq_dirty));
+                if (pending) {
+#ifdef CONFIG_SMP
+                        int i;
+                        for (i=0; i<NR_CPUS; i++) {
+                                /*
+                                 * Clear for all CPUs so an affinity switch
+                                 * doesn't find an old status
+                                 */
+                                __raw_writeq(pending, IOADDR(A_BCM1480_IMR_REGISTER(cpu_logical_map(i),
+                                                                R_BCM1480_IMR_LDT_INTERRUPT_CLR_H + (k*BCM1480_IMR_HL_SPACING))));
+                        }
+#else
+                        __raw_writeq(pending, IOADDR(A_BCM1480_IMR_REGISTER(0, R_BCM1480_IMR_LDT_INTERRUPT_CLR_H + (k*BCM1480_IMR_HL_SPACING))));
+#endif
+
+                        /*
+                         * Generate EOI.  For Pass 1 parts, EOI is a nop.  For
+                         * Pass 2, the LDT world may be edge-triggered, but
+                         * this EOI shouldn't hurt.  If they are
+                         * level-sensitive, the EOI is required.
+                         */
+#ifdef CONFIG_PCI
+                        if (ht_eoi_space)
+                                *(uint32_t *)(ht_eoi_space+(irq<<16)+(7<<2)) = 0;
+#endif
+                }
+        }
+        bcm1480_mask_irq(bcm1480_irq_owner[irq], irq);
+}
+
+
+static void end_bcm1480_irq(unsigned int irq)
+{
+        if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS))) {
+                bcm1480_unmask_irq(bcm1480_irq_owner[irq], irq);
+        }
+}
+
+
+void __init init_bcm1480_irqs(void)
+{
+        int i;
+
+        for (i = 0; i < NR_IRQS; i++) {
+                irq_desc[i].status = IRQ_DISABLED;
+                irq_desc[i].action = 0;
+                irq_desc[i].depth = 1;
+                if (i < BCM1480_NR_IRQS) {
+                        irq_desc[i].handler = &bcm1480_irq_type;
+                        bcm1480_irq_owner[i] = 0;
+                } else {
+                        irq_desc[i].handler = &no_irq_type;
+                }
+        }
+}
+
+
+static irqreturn_t bcm1480_dummy_handler(int irq, void *dev_id,
+        struct pt_regs *regs)
+{
+        return IRQ_NONE;
+}
+
+static struct irqaction bcm1480_dummy_action = {
+        .handler = bcm1480_dummy_handler,
+        .flags   = 0,
+        .mask    = CPU_MASK_NONE,
+        .name    = "bcm1480-private",
+        .next    = NULL,
+        .dev_id  = 0
+};
+
+int bcm1480_steal_irq(int irq)
+{
+        irq_desc_t *desc = irq_desc + irq;
+        unsigned long flags;
+        int retval = 0;
+
+        if (irq >= BCM1480_NR_IRQS)
+                return -EINVAL;
+
+        spin_lock_irqsave(&desc->lock,flags);
+        /* Don't allow sharing at all for these */
+        if (desc->action != NULL)
+                retval = -EBUSY;
+        else {
+                desc->action = &bcm1480_dummy_action;
+                desc->depth = 0;
+        }
+        spin_unlock_irqrestore(&desc->lock,flags);
+        return 0;
+}
+
+/*
+ *  init_IRQ is called early in the boot sequence from init/main.c.  It
+ *  is responsible for setting up the interrupt mapper and installing the
+ *  handler that will be responsible for dispatching interrupts to the
+ *  "right" place.
+ */
+/*
+ * For now, map all interrupts to IP[2].  We could save
+ * some cycles by parceling out system interrupts to different
+ * IP lines, but keep it simple for bringup.  We'll also direct
+ * all interrupts to a single CPU; we should probably route
+ * PCI and LDT to one cpu and everything else to the other
+ * to balance the load a bit.
+ *
+ * On the second cpu, everything is set to IP5, which is
+ * ignored, EXCEPT the mailbox interrupt.  That one is
+ * set to IP[2] so it is handled.  This is needed so we
+ * can do cross-cpu function calls, as requred by SMP
+ */
+
+#define IMR_IP2_VAL     K_BCM1480_INT_MAP_I0
+#define IMR_IP3_VAL     K_BCM1480_INT_MAP_I1
+#define IMR_IP4_VAL     K_BCM1480_INT_MAP_I2
+#define IMR_IP5_VAL     K_BCM1480_INT_MAP_I3
+#define IMR_IP6_VAL     K_BCM1480_INT_MAP_I4
+
+void __init arch_init_irq(void)
+{
+
+        unsigned int i, cpu;
+        u64 tmp;
+        unsigned int imask = STATUSF_IP4 | STATUSF_IP3 | STATUSF_IP2 |
+                STATUSF_IP1 | STATUSF_IP0;
+
+        /* Default everything to IP2 */
+        /* Start with _high registers which has no bit 0 interrupt source */
+        for (i = 1; i < BCM1480_NR_IRQS_HALF; i++) {    /* was I0 */
+                for (cpu = 0; cpu < 4; cpu++) {
+                        __raw_writeq(IMR_IP2_VAL,
+                                     IOADDR(A_BCM1480_IMR_REGISTER(cpu,
+                                                                   R_BCM1480_IMR_INTERRUPT_MAP_BASE_H) + (i << 3)));
+                }
+        }
+
+        /* Now do _low registers */
+        for (i = 0; i < BCM1480_NR_IRQS_HALF; i++) {
+                for (cpu = 0; cpu < 4; cpu++) {
+                        __raw_writeq(IMR_IP2_VAL,
+                                     IOADDR(A_BCM1480_IMR_REGISTER(cpu,
+                                                                   R_BCM1480_IMR_INTERRUPT_MAP_BASE_L) + (i << 3)));
+                }
+        }
+
+        init_bcm1480_irqs();
+
+        /*
+         * Map the high 16 bits of mailbox_0 registers to IP[3], for
+         * inter-cpu messages
+         */
+        /* Was I1 */
+        for (cpu = 0; cpu < 4; cpu++) {
+                __raw_writeq(IMR_IP3_VAL, IOADDR(A_BCM1480_IMR_REGISTER(cpu, R_BCM1480_IMR_INTERRUPT_MAP_BASE_H) +
+                                                 (K_BCM1480_INT_MBOX_0_0 << 3)));
+        }
+
+
+        /* Clear the mailboxes.  The firmware may leave them dirty */
+        for (cpu = 0; cpu < 4; cpu++) {
+                __raw_writeq(0xffffffffffffffffULL,
+                             IOADDR(A_BCM1480_IMR_REGISTER(cpu, R_BCM1480_IMR_MAILBOX_0_CLR_CPU)));
+                __raw_writeq(0xffffffffffffffffULL,
+                             IOADDR(A_BCM1480_IMR_REGISTER(cpu, R_BCM1480_IMR_MAILBOX_1_CLR_CPU)));
+        }
+
+
+        /* Mask everything except the high 16 bit of mailbox_0 registers for all cpus */
+        tmp = ~((u64) 0) ^ ( (((u64) 1) << K_BCM1480_INT_MBOX_0_0));
+        for (cpu = 0; cpu < 4; cpu++) {
+                __raw_writeq(tmp, IOADDR(A_BCM1480_IMR_REGISTER(cpu, R_BCM1480_IMR_INTERRUPT_MASK_H)));
+        }
+        tmp = ~((u64) 0);
+        for (cpu = 0; cpu < 4; cpu++) {
+                __raw_writeq(tmp, IOADDR(A_BCM1480_IMR_REGISTER(cpu, R_BCM1480_IMR_INTERRUPT_MASK_L)));
+        }
+
+        bcm1480_steal_irq(K_BCM1480_INT_MBOX_0_0);
+
+        /*
+         * Note that the timer interrupts are also mapped, but this is
+         * done in bcm1480_time_init().  Also, the profiling driver
+         * does its own management of IP7.
+         */
+
+#ifdef CONFIG_KGDB
+        imask |= STATUSF_IP6;
+#endif
+        /* Enable necessary IPs, disable the rest */
+        change_c0_status(ST0_IM, imask);
+        set_except_vector(0, bcm1480_irq_handler);
+
+#ifdef CONFIG_KGDB
+        if (kgdb_flag) {
+                kgdb_irq = K_BCM1480_INT_UART_0 + kgdb_port;
+
+#ifdef CONFIG_SIBYTE_SB1250_DUART
+                sb1250_duart_present[kgdb_port] = 0;
+#endif
+                /* Setup uart 1 settings, mapper */
+                /* QQQ FIXME */
+                __raw_writeq(M_DUART_IMR_BRK, IO_SPACE_BASE + A_DUART_IMRREG(kgdb_port));
+
+                bcm1480_steal_irq(kgdb_irq);
+                __raw_writeq(IMR_IP6_VAL,
+                             IO_SPACE_BASE + A_BCM1480_IMR_REGISTER(0, R_BCM1480_IMR_INTERRUPT_MAP_BASE_H) +
+                             (kgdb_irq<<3));
+                bcm1480_unmask_irq(0, kgdb_irq);
+
+#ifdef CONFIG_GDB_CONSOLE
+                register_gdb_console();
+#endif
+                prom_printf("Waiting for GDB on UART port %d\n", kgdb_port);
+                set_debug_traps();
+                breakpoint();
+        }
+#endif
+}
+
+#ifdef CONFIG_KGDB
+
+#include <linux/delay.h>
+
+#define duart_out(reg, val)     csr_out32(val, IOADDR(A_DUART_CHANREG(kgdb_port,reg)))
+#define duart_in(reg)           csr_in32(IOADDR(A_DUART_CHANREG(kgdb_port,reg)))
+
+void bcm1480_kgdb_interrupt(struct pt_regs *regs)
+{
+        /*
+         * Clear break-change status (allow some time for the remote
+         * host to stop the break, since we would see another
+         * interrupt on the end-of-break too)
+         */
+        kstat.irqs[smp_processor_id()][kgdb_irq]++;
+        mdelay(500);
+        duart_out(R_DUART_CMD, V_DUART_MISC_CMD_RESET_BREAK_INT |
+                                M_DUART_RX_EN | M_DUART_TX_EN);
+        set_async_breakpoint(&regs->cp0_epc);
+}
+
+#endif  /* CONFIG_KGDB */
diff --git a/arch/mips/sibyte/bcm1480/irq_handler.S b/arch/mips/sibyte/bcm1480/irq_handler.S
new file mode 100644
index 000000000000..408db88d050f
--- /dev/null
+++ b/arch/mips/sibyte/bcm1480/irq_handler.S
@@ -0,0 +1,165 @@
+/*
+ * Copyright (C) 2000,2001,2002,2003,2004 Broadcom Corporation
+ *
+ * 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 program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+
+/*
+ * bcm1480_irq_handler() is the routine that is actually called when an
+ * interrupt occurs.  It is installed as the exception vector handler in
+ * init_IRQ() in arch/mips/sibyte/bcm1480/irq.c
+ *
+ * In the handle we figure out which interrupts need handling, and use that
+ * to call the dispatcher, which will take care of actually calling
+ * registered handlers
+ *
+ * Note that we take care of all raised interrupts in one go at the handler.
+ * This is more BSDish than the Indy code, and also, IMHO, more sane.
+ */
+#include <linux/config.h>
+
+#include <asm/addrspace.h>
+#include <asm/asm.h>
+#include <asm/mipsregs.h>
+#include <asm/regdef.h>
+#include <asm/stackframe.h>
+#include <asm/sibyte/sb1250_defs.h>
+#include <asm/sibyte/bcm1480_regs.h>
+#include <asm/sibyte/bcm1480_int.h>
+
+/*
+ * What a pain. We have to be really careful saving the upper 32 bits of any
+ * register across function calls if we don't want them trashed--since were
+ * running in -o32, the calling routing never saves the full 64 bits of a
+ * register across a function call.  Being the interrupt handler, we're
+ * guaranteed that interrupts are disabled during this code so we don't have
+ * to worry about random interrupts blasting the high 32 bits.
+ */
+
+        .text
+        .set    push
+        .set    noreorder
+        .set    noat
+        .set    mips64
+        #.set   mips4
+        .align  5
+        NESTED(bcm1480_irq_handler, PT_SIZE, sp)
+        SAVE_ALL
+        CLI
+
+#ifdef CONFIG_SIBYTE_BCM1480_PROF
+        /* Set compare to count to silence count/compare timer interrupts */
+        mfc0    t1, CP0_COUNT
+        mtc0    t1, CP0_COMPARE /* pause to clear IP[7] bit of cause ? */
+#endif
+        /* Read cause */
+        mfc0    s0, CP0_CAUSE
+
+#ifdef CONFIG_SIBYTE_BCM1480_PROF
+        /* Cpu performance counter interrupt is routed to IP[7] */
+        andi    t1, s0, CAUSEF_IP7
+        beqz    t1, 0f
+         srl    t1, s0, (CAUSEB_BD-2)   /* Shift BD bit to bit 2 */
+        and     t1, t1, 0x4             /* mask to get just BD bit */
+#ifdef CONFIG_MIPS64
+        dmfc0   a0, CP0_EPC
+        daddu   a0, a0, t1              /* a0 = EPC + (BD ? 4 : 0) */
+#else
+        mfc0    a0, CP0_EPC
+        addu    a0, a0, t1              /* a0 = EPC + (BD ? 4 : 0) */
+#endif
+        jal     sbprof_cpu_intr
+         nop
+        j       ret_from_irq
+         nop
+0:
+#endif
+
+        /* Timer interrupt is routed to IP[4] */
+        andi    t1, s0, CAUSEF_IP4
+        beqz    t1, 1f
+         nop
+        jal     bcm1480_timer_interrupt
+         move   a0, sp                  /* Pass the registers along */
+        j       ret_from_irq
+         nop                            /* delay slot  */
+1:
+
+#ifdef CONFIG_SMP
+        /* Mailbox interrupt is routed to IP[3] */
+        andi     t1, s0, CAUSEF_IP3
+        beqz     t1, 2f
+         nop
+        jal      bcm1480_mailbox_interrupt
+         move    a0, sp
+        j        ret_from_irq
+         nop                            /* delay slot  */
+2:
+#endif
+
+#ifdef CONFIG_KGDB
+        /* KGDB (uart 1) interrupt is routed to IP[6] */
+        andi     t1, s0, CAUSEF_IP6
+        beqz     t1, 3f
+         nop                            /* delay slot  */
+        jal      bcm1480_kgdb_interrupt
+         move    a0, sp
+        j        ret_from_irq
+         nop                            /* delay slot  */
+3:
+#endif
+
+        and      t1, s0, CAUSEF_IP2
+        beqz     t1, 9f
+         nop
+
+        /*
+         * Default...we've hit an IP[2] interrupt, which means we've got
+         * to check the 1480 interrupt registers to figure out what to do
+         * Need to detect which CPU we're on, now that smp_affinity is
+         * supported.
+         */
+        PTR_LA   v0, CKSEG1 + A_BCM1480_IMR_CPU0_BASE
+#ifdef CONFIG_SMP
+        lw       t1, TI_CPU($28)
+        sll      t1, t1, BCM1480_IMR_REGISTER_SPACING_SHIFT
+        addu     v0, v0, t1
+#endif
+
+        /* Read IP[2] status (get both high and low halves of status) */
+        ld       s0, R_BCM1480_IMR_INTERRUPT_STATUS_BASE_H(v0)
+        ld       s1, R_BCM1480_IMR_INTERRUPT_STATUS_BASE_L(v0)
+
+        move     s2, zero       /* intr number  */
+        li       s3, 64
+
+        beqz     s0, 9f         /* No interrupts.  Return.  */
+         move    a1, sp
+
+        xori     s4, s0, 1      /* if s0 (_H) == 1, it's a low intr, so...  */
+        movz     s2, s3, s4     /* start the intr number at 64, and  */
+        movz     s0, s1, s4     /* look at the low status value.  */
+
+        dclz     s1, s0         /* Find the next interrupt.  */
+        dsubu    a0, zero, s1
+        daddiu   a0, a0, 63
+        jal      do_IRQ
+         daddu   a0, a0, s2
+
+9:      j        ret_from_irq
+         nop
+
+        .set pop
+        END(bcm1480_irq_handler)
diff --git a/arch/mips/sibyte/bcm1480/setup.c b/arch/mips/sibyte/bcm1480/setup.c
new file mode 100644
index 000000000000..d90a0b87874c
--- /dev/null
+++ b/arch/mips/sibyte/bcm1480/setup.c
@@ -0,0 +1,136 @@
+/*
+ * Copyright (C) 2000,2001,2002,2003,2004 Broadcom Corporation
+ *
+ * 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 program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/reboot.h>
+#include <linux/string.h>
+
+#include <asm/bootinfo.h>
+#include <asm/mipsregs.h>
+#include <asm/io.h>
+#include <asm/sibyte/sb1250.h>
+
+#include <asm/sibyte/bcm1480_regs.h>
+#include <asm/sibyte/bcm1480_scd.h>
+#include <asm/sibyte/sb1250_scd.h>
+
+unsigned int sb1_pass;
+unsigned int soc_pass;
+unsigned int soc_type;
+unsigned int periph_rev;
+unsigned int zbbus_mhz;
+
+static unsigned int part_type;
+
+static char *soc_str;
+static char *pass_str;
+
+static inline int setup_bcm1x80_bcm1x55(void);
+
+/* Setup code likely to be common to all SiByte platforms */
+
+static inline int sys_rev_decode(void)
+{
+        int ret = 0;
+
+        switch (soc_type) {
+            case K_SYS_SOC_TYPE_BCM1x80:
+                if (part_type == K_SYS_PART_BCM1480)
+                    soc_str = "BCM1480";
+                else if (part_type == K_SYS_PART_BCM1280)
+                    soc_str = "BCM1280";
+                else
+                    soc_str = "BCM1x80";
+                ret = setup_bcm1x80_bcm1x55();
+                break;
+
+            case K_SYS_SOC_TYPE_BCM1x55:
+                if (part_type == K_SYS_PART_BCM1455)
+                    soc_str = "BCM1455";
+                else if (part_type == K_SYS_PART_BCM1255)
+                    soc_str = "BCM1255";
+                else
+                    soc_str = "BCM1x55";
+                ret = setup_bcm1x80_bcm1x55();
+                break;
+
+            default:
+                prom_printf("Unknown part type %x\n", part_type);
+                ret = 1;
+                break;
+        }
+        return ret;
+}
+
+static inline int setup_bcm1x80_bcm1x55(void)
+{
+        int ret = 0;
+
+        switch (soc_pass) {
+            case K_SYS_REVISION_BCM1480_S0:
+                periph_rev = 1;
+                pass_str = "S0 (pass1)";
+                break;
+            case K_SYS_REVISION_BCM1480_A1:
+                periph_rev = 1;
+                pass_str = "A1 (pass1)";
+                break;
+            case K_SYS_REVISION_BCM1480_A2:
+                periph_rev = 1;
+                pass_str = "A2 (pass1)";
+                break;
+            case K_SYS_REVISION_BCM1480_A3:
+                periph_rev = 1;
+                pass_str = "A3 (pass1)";
+                break;
+            case K_SYS_REVISION_BCM1480_B0:
+                periph_rev = 1;
+                pass_str = "B0 (pass2)";
+                break;
+            default:
+                prom_printf("Unknown %s rev %x\n", soc_str, soc_pass);
+                periph_rev = 1;
+                pass_str = "Unknown Revision";
+                break;
+        }
+        return ret;
+}
+
+void bcm1480_setup(void)
+{
+        uint64_t sys_rev;
+        int plldiv;
+
+        sb1_pass = read_c0_prid() & 0xff;
+        sys_rev = __raw_readq(IOADDR(A_SCD_SYSTEM_REVISION));
+        soc_type = SYS_SOC_TYPE(sys_rev);
+        part_type = G_SYS_PART(sys_rev);
+        soc_pass = G_SYS_REVISION(sys_rev);
+
+        if (sys_rev_decode()) {
+                prom_printf("Restart after failure to identify SiByte chip\n");
+                machine_restart(NULL);
+        }
+
+        plldiv = G_BCM1480_SYS_PLL_DIV(__raw_readq(IOADDR(A_SCD_SYSTEM_CFG)));
+        zbbus_mhz = ((plldiv >> 1) * 50) + ((plldiv & 1) * 25);
+
+        prom_printf("Broadcom SiByte %s %s @ %d MHz (SB-1A rev %d)\n",
+                    soc_str, pass_str, zbbus_mhz * 2, sb1_pass);
+        prom_printf("Board type: %s\n", get_system_type());
+}
diff --git a/arch/mips/sibyte/bcm1480/smp.c b/arch/mips/sibyte/bcm1480/smp.c
new file mode 100644
index 000000000000..584a4b33faac
--- /dev/null
+++ b/arch/mips/sibyte/bcm1480/smp.c
@@ -0,0 +1,110 @@
+/*
+ * Copyright (C) 2001,2002,2004 Broadcom Corporation
+ *
+ * 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 program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/smp.h>
+#include <linux/kernel_stat.h>
+
+#include <asm/mmu_context.h>
+#include <asm/io.h>
+#include <asm/sibyte/sb1250.h>
+#include <asm/sibyte/bcm1480_regs.h>
+#include <asm/sibyte/bcm1480_int.h>
+
+extern void smp_call_function_interrupt(void);
+
+/*
+ * These are routines for dealing with the bcm1480 smp capabilities
+ * independent of board/firmware
+ */
+
+static void *mailbox_0_set_regs[] = {
+        IOADDR(A_BCM1480_IMR_CPU0_BASE + R_BCM1480_IMR_MAILBOX_0_SET_CPU),
+        IOADDR(A_BCM1480_IMR_CPU1_BASE + R_BCM1480_IMR_MAILBOX_0_SET_CPU),
+        IOADDR(A_BCM1480_IMR_CPU2_BASE + R_BCM1480_IMR_MAILBOX_0_SET_CPU),
+        IOADDR(A_BCM1480_IMR_CPU3_BASE + R_BCM1480_IMR_MAILBOX_0_SET_CPU),
+};
+
+static void *mailbox_0_clear_regs[] = {
+        IOADDR(A_BCM1480_IMR_CPU0_BASE + R_BCM1480_IMR_MAILBOX_0_CLR_CPU),
+        IOADDR(A_BCM1480_IMR_CPU1_BASE + R_BCM1480_IMR_MAILBOX_0_CLR_CPU),
+        IOADDR(A_BCM1480_IMR_CPU2_BASE + R_BCM1480_IMR_MAILBOX_0_CLR_CPU),
+        IOADDR(A_BCM1480_IMR_CPU3_BASE + R_BCM1480_IMR_MAILBOX_0_CLR_CPU),
+};
+
+static void *mailbox_0_regs[] = {
+        IOADDR(A_BCM1480_IMR_CPU0_BASE + R_BCM1480_IMR_MAILBOX_0_CPU),
+        IOADDR(A_BCM1480_IMR_CPU1_BASE + R_BCM1480_IMR_MAILBOX_0_CPU),
+        IOADDR(A_BCM1480_IMR_CPU2_BASE + R_BCM1480_IMR_MAILBOX_0_CPU),
+        IOADDR(A_BCM1480_IMR_CPU3_BASE + R_BCM1480_IMR_MAILBOX_0_CPU),
+};
+
+/*
+ * SMP init and finish on secondary CPUs
+ */
+void bcm1480_smp_init(void)
+{
+        unsigned int imask = STATUSF_IP4 | STATUSF_IP3 | STATUSF_IP2 |
+                STATUSF_IP1 | STATUSF_IP0;
+
+        /* Set interrupt mask, but don't enable */
+        change_c0_status(ST0_IM, imask);
+}
+
+void bcm1480_smp_finish(void)
+{
+        extern void bcm1480_time_init(void);
+        bcm1480_time_init();
+        local_irq_enable();
+}
+
+/*
+ * These are routines for dealing with the sb1250 smp capabilities
+ * independent of board/firmware
+ */
+
+/*
+ * Simple enough; everything is set up, so just poke the appropriate mailbox
+ * register, and we should be set
+ */
+void core_send_ipi(int cpu, unsigned int action)
+{
+        __raw_writeq((((u64)action)<< 48), mailbox_0_set_regs[cpu]);
+}
+
+void bcm1480_mailbox_interrupt(struct pt_regs *regs)
+{
+        int cpu = smp_processor_id();
+        unsigned int action;
+
+        kstat_this_cpu.irqs[K_BCM1480_INT_MBOX_0_0]++;
+        /* Load the mailbox register to figure out what we're supposed to do */
+        action = (__raw_readq(mailbox_0_regs[cpu]) >> 48) & 0xffff;
+
+        /* Clear the mailbox to clear the interrupt */
+        __raw_writeq(((u64)action)<<48, mailbox_0_clear_regs[cpu]);
+
+        /*
+         * Nothing to do for SMP_RESCHEDULE_YOURSELF; returning from the
+         * interrupt will do the reschedule for us
+         */
+
+        if (action & SMP_CALL_FUNCTION)
+                smp_call_function_interrupt();
+}
diff --git a/arch/mips/sibyte/bcm1480/time.c b/arch/mips/sibyte/bcm1480/time.c
new file mode 100644
index 000000000000..e545752695a1
--- /dev/null
+++ b/arch/mips/sibyte/bcm1480/time.c
@@ -0,0 +1,138 @@
+/*
+ * Copyright (C) 2000,2001,2004 Broadcom Corporation
+ *
+ * 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 program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+
+/*
+ * These are routines to set up and handle interrupts from the
+ * bcm1480 general purpose timer 0.  We're using the timer as a
+ * system clock, so we set it up to run at 100 Hz.  On every
+ * interrupt, we update our idea of what the time of day is,
+ * then call do_timer() in the architecture-independent kernel
+ * code to do general bookkeeping (e.g. update jiffies, run
+ * bottom halves, etc.)
+ */
+#include <linux/config.h>
+#include <linux/interrupt.h>
+#include <linux/sched.h>
+#include <linux/spinlock.h>
+#include <linux/kernel_stat.h>
+
+#include <asm/irq.h>
+#include <asm/ptrace.h>
+#include <asm/addrspace.h>
+#include <asm/time.h>
+#include <asm/io.h>
+
+#include <asm/sibyte/bcm1480_regs.h>
+#include <asm/sibyte/sb1250_regs.h>
+#include <asm/sibyte/bcm1480_int.h>
+#include <asm/sibyte/bcm1480_scd.h>
+
+#include <asm/sibyte/sb1250.h>
+
+
+#define IMR_IP2_VAL     K_BCM1480_INT_MAP_I0
+#define IMR_IP3_VAL     K_BCM1480_INT_MAP_I1
+#define IMR_IP4_VAL     K_BCM1480_INT_MAP_I2
+
+extern int bcm1480_steal_irq(int irq);
+
+void bcm1480_time_init(void)
+{
+        int cpu = smp_processor_id();
+        int irq = K_BCM1480_INT_TIMER_0+cpu;
+
+        /* Only have 4 general purpose timers */
+        if (cpu > 3) {
+                BUG();
+        }
+
+        if (!cpu) {
+                /* Use our own gettimeoffset() routine */
+                do_gettimeoffset = bcm1480_gettimeoffset;
+        }
+
+        bcm1480_mask_irq(cpu, irq);
+
+        /* Map the timer interrupt to ip[4] of this cpu */
+        __raw_writeq(IMR_IP4_VAL, IOADDR(A_BCM1480_IMR_REGISTER(cpu, R_BCM1480_IMR_INTERRUPT_MAP_BASE_H)
+              + (irq<<3)));
+
+        /* the general purpose timer ticks at 1 Mhz independent of the rest of the system */
+        /* Disable the timer and set up the count */
+        __raw_writeq(0, IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_CFG)));
+        __raw_writeq(
+#ifndef CONFIG_SIMULATION
+                1000000/HZ
+#else
+                50000/HZ
+#endif
+                , IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_INIT)));
+
+        /* Set the timer running */
+        __raw_writeq(M_SCD_TIMER_ENABLE|M_SCD_TIMER_MODE_CONTINUOUS,
+              IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_CFG)));
+
+        bcm1480_unmask_irq(cpu, irq);
+        bcm1480_steal_irq(irq);
+        /*
+         * This interrupt is "special" in that it doesn't use the request_irq
+         * way to hook the irq line.  The timer interrupt is initialized early
+         * enough to make this a major pain, and it's also firing enough to
+         * warrant a bit of special case code.  bcm1480_timer_interrupt is
+         * called directly from irq_handler.S when IP[4] is set during an
+         * interrupt
+         */
+}
+
+#include <asm/sibyte/sb1250.h>
+
+void bcm1480_timer_interrupt(struct pt_regs *regs)
+{
+        int cpu = smp_processor_id();
+        int irq = K_BCM1480_INT_TIMER_0+cpu;
+
+        /* Reset the timer */
+        __raw_writeq(M_SCD_TIMER_ENABLE|M_SCD_TIMER_MODE_CONTINUOUS,
+              IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_CFG)));
+
+        /*
+         * CPU 0 handles the global timer interrupt job
+         */
+        if (cpu == 0) {
+                ll_timer_interrupt(irq, regs);
+        }
+
+        /*
+         * every CPU should do profiling and process accouting
+         */
+        ll_local_timer_interrupt(irq, regs);
+}
+
+/*
+ * We use our own do_gettimeoffset() instead of the generic one,
+ * because the generic one does not work for SMP case.
+ * In addition, since we use general timer 0 for system time,
+ * we can get accurate intra-jiffy offset without calibration.
+ */
+unsigned long bcm1480_gettimeoffset(void)
+{
+        unsigned long count =
+                __raw_readq(IOADDR(A_SCD_TIMER_REGISTER(0, R_SCD_TIMER_CNT)));
+
+        return 1000000/HZ - count;
+}
diff --git a/arch/mips/sibyte/cfe/smp.c b/arch/mips/sibyte/cfe/smp.c
index e44ce1a9eea9..e8485124b8fc 100644
--- a/arch/mips/sibyte/cfe/smp.c
+++ b/arch/mips/sibyte/cfe/smp.c
@@ -70,8 +70,15 @@ void prom_boot_secondary(int cpu, struct task_struct *idle)
  */
 void prom_init_secondary(void)
 {
+#if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
+        extern void bcm1480_smp_init(void);
+        bcm1480_smp_init();
+#elif defined(CONFIG_SIBYTE_SB1250)
         extern void sb1250_smp_init(void);
         sb1250_smp_init();
+#else
+#error invalid SMP configuration
+#endif
 }
 
 /*
@@ -80,8 +87,15 @@ void prom_init_secondary(void)
  */
 void prom_smp_finish(void)
 {
+#if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
+        extern void bcm1480_smp_finish(void);
+        bcm1480_smp_finish();
+#elif defined(CONFIG_SIBYTE_SB1250)
         extern void sb1250_smp_finish(void);
         sb1250_smp_finish();
+#else
+#error invalid SMP configuration
+#endif
 }
 
 /*
diff --git a/arch/mips/sibyte/swarm/setup.c b/arch/mips/sibyte/swarm/setup.c
index f8963de1bbf4..b614ca0ddb69 100644
--- a/arch/mips/sibyte/swarm/setup.c
+++ b/arch/mips/sibyte/swarm/setup.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2000, 2001, 2002, 2003 Broadcom Corporation
+ * Copyright (C) 2000, 2001, 2002, 2003, 2004 Broadcom Corporation
  * Copyright (C) 2004 by Ralf Baechle (ralf@linux-mips.org)
  *
  * This program is free software; you can redistribute it and/or
@@ -39,11 +39,23 @@
 #include <asm/time.h>
 #include <asm/traps.h>
 #include <asm/sibyte/sb1250.h>
+#if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
+#include <asm/sibyte/bcm1480_regs.h>
+#elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
 #include <asm/sibyte/sb1250_regs.h>
+#else
+#error invalid SiByte board configuation
+#endif
 #include <asm/sibyte/sb1250_genbus.h>
 #include <asm/sibyte/board.h>
 
+#if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
+extern void bcm1480_setup(void);
+#elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
 extern void sb1250_setup(void);
+#else
+#error invalid SiByte board configuation
+#endif
 
 extern int xicor_probe(void);
 extern int xicor_set_time(unsigned long);
@@ -66,7 +78,13 @@ void __init swarm_timer_setup(struct irqaction *irq)
          */
 
         /* We only need to setup the generic timer */
-        sb1250_time_init();
+#if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
+        bcm1480_time_init();
+#elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
+        sb1250_time_init();
+#else
+#error invalid SiByte board configuation
+#endif
 }
 
 int swarm_be_handler(struct pt_regs *regs, int is_fixup)
@@ -81,7 +99,13 @@ int swarm_be_handler(struct pt_regs *regs, int is_fixup)
 
 void __init plat_setup(void)
 {
+#if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
+        bcm1480_setup();
+#elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
         sb1250_setup();
+#else
+#error invalid SiByte board configuation
+#endif
 
         panic_timeout = 5;  /* For debug.  */