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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/mips/sibyte/bcm1480
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/mips/sibyte/bcm1480')
-rw-r--r--kernel/arch/mips/sibyte/bcm1480/Makefile3
-rw-r--r--kernel/arch/mips/sibyte/bcm1480/irq.c361
-rw-r--r--kernel/arch/mips/sibyte/bcm1480/setup.c140
-rw-r--r--kernel/arch/mips/sibyte/bcm1480/smp.c189
-rw-r--r--kernel/arch/mips/sibyte/bcm1480/time.c27
5 files changed, 720 insertions, 0 deletions
diff --git a/kernel/arch/mips/sibyte/bcm1480/Makefile b/kernel/arch/mips/sibyte/bcm1480/Makefile
new file mode 100644
index 000000000..cdc4c56c3
--- /dev/null
+++ b/kernel/arch/mips/sibyte/bcm1480/Makefile
@@ -0,0 +1,3 @@
+obj-y := setup.o irq.o time.o
+
+obj-$(CONFIG_SMP) += smp.o
diff --git a/kernel/arch/mips/sibyte/bcm1480/irq.c b/kernel/arch/mips/sibyte/bcm1480/irq.c
new file mode 100644
index 000000000..373fbbc84
--- /dev/null
+++ b/kernel/arch/mips/sibyte/bcm1480/irq.c
@@ -0,0 +1,361 @@
+/*
+ * 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/kernel.h>
+#include <linux/init.h>
+#include <linux/linkage.h>
+#include <linux/interrupt.h>
+#include <linux/smp.h>
+#include <linux/spinlock.h>
+#include <linux/mm.h>
+#include <linux/kernel_stat.h>
+
+#include <asm/errno.h>
+#include <asm/irq_regs.h>
+#include <asm/signal.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
+ */
+
+#ifdef CONFIG_PCI
+extern unsigned long ht_eoi_space;
+#endif
+
+/* Store the CPU id (not the logical number) */
+int bcm1480_irq_owner[BCM1480_NR_IRQS];
+
+static DEFINE_RAW_SPINLOCK(bcm1480_imr_lock);
+
+void bcm1480_mask_irq(int cpu, int irq)
+{
+ unsigned long flags, hl_spacing;
+ u64 cur_ints;
+
+ raw_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));
+ raw_spin_unlock_irqrestore(&bcm1480_imr_lock, flags);
+}
+
+void bcm1480_unmask_irq(int cpu, int irq)
+{
+ unsigned long flags, hl_spacing;
+ u64 cur_ints;
+
+ raw_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));
+ raw_spin_unlock_irqrestore(&bcm1480_imr_lock, flags);
+}
+
+#ifdef CONFIG_SMP
+static int bcm1480_set_affinity(struct irq_data *d, const struct cpumask *mask,
+ bool force)
+{
+ unsigned int irq_dirty, irq = d->irq;
+ int i = 0, old_cpu, cpu, int_on, k;
+ u64 cur_ints;
+ unsigned long flags;
+
+ i = cpumask_first_and(mask, cpu_online_mask);
+
+ /* Convert logical CPU to physical CPU */
+ cpu = cpu_logical_map(i);
+
+ /* Protect against other affinity changers and IMR manipulation */
+ raw_spin_lock_irqsave(&bcm1480_imr_lock, flags);
+
+ /* 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;
+ }
+
+ 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)));
+ }
+ }
+ raw_spin_unlock_irqrestore(&bcm1480_imr_lock, flags);
+
+ return 0;
+}
+#endif
+
+
+/*****************************************************************************/
+
+static void disable_bcm1480_irq(struct irq_data *d)
+{
+ unsigned int irq = d->irq;
+
+ bcm1480_mask_irq(bcm1480_irq_owner[irq], irq);
+}
+
+static void enable_bcm1480_irq(struct irq_data *d)
+{
+ unsigned int irq = d->irq;
+
+ bcm1480_unmask_irq(bcm1480_irq_owner[irq], irq);
+}
+
+
+static void ack_bcm1480_irq(struct irq_data *d)
+{
+ unsigned int irq_dirty, irq = d->irq;
+ u64 pending;
+ int k;
+
+ /*
+ * 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;
+ }
+ 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 struct irq_chip bcm1480_irq_type = {
+ .name = "BCM1480-IMR",
+ .irq_mask_ack = ack_bcm1480_irq,
+ .irq_mask = disable_bcm1480_irq,
+ .irq_unmask = enable_bcm1480_irq,
+#ifdef CONFIG_SMP
+ .irq_set_affinity = bcm1480_set_affinity
+#endif
+};
+
+void __init init_bcm1480_irqs(void)
+{
+ int i;
+
+ for (i = 0; i < BCM1480_NR_IRQS; i++) {
+ irq_set_chip_and_handler(i, &bcm1480_irq_type,
+ handle_level_irq);
+ bcm1480_irq_owner[i] = 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 required 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)));
+ }
+
+ /*
+ * 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.
+ */
+
+ /* Enable necessary IPs, disable the rest */
+ change_c0_status(ST0_IM, imask);
+}
+
+extern void bcm1480_mailbox_interrupt(void);
+
+static inline void dispatch_ip2(void)
+{
+ unsigned long long mask_h, mask_l;
+ unsigned int cpu = smp_processor_id();
+ unsigned long base;
+
+ /*
+ * 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.
+ */
+ base = A_BCM1480_IMR_MAPPER(cpu);
+ mask_h = __raw_readq(
+ IOADDR(base + R_BCM1480_IMR_INTERRUPT_STATUS_BASE_H));
+ mask_l = __raw_readq(
+ IOADDR(base + R_BCM1480_IMR_INTERRUPT_STATUS_BASE_L));
+
+ if (mask_h) {
+ if (mask_h ^ 1)
+ do_IRQ(fls64(mask_h) - 1);
+ else if (mask_l)
+ do_IRQ(63 + fls64(mask_l));
+ }
+}
+
+asmlinkage void plat_irq_dispatch(void)
+{
+ unsigned int cpu = smp_processor_id();
+ unsigned int pending;
+
+ pending = read_c0_cause() & read_c0_status();
+
+ if (pending & CAUSEF_IP4)
+ do_IRQ(K_BCM1480_INT_TIMER_0 + cpu);
+#ifdef CONFIG_SMP
+ else if (pending & CAUSEF_IP3)
+ bcm1480_mailbox_interrupt();
+#endif
+
+ else if (pending & CAUSEF_IP2)
+ dispatch_ip2();
+}
diff --git a/kernel/arch/mips/sibyte/bcm1480/setup.c b/kernel/arch/mips/sibyte/bcm1480/setup.c
new file mode 100644
index 000000000..8e2e04f77
--- /dev/null
+++ b/kernel/arch/mips/sibyte/bcm1480/setup.c
@@ -0,0 +1,140 @@
+/*
+ * 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/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/reboot.h>
+#include <linux/string.h>
+
+#include <asm/bootinfo.h>
+#include <asm/cpu.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;
+EXPORT_SYMBOL(soc_type);
+unsigned int periph_rev;
+unsigned int zbbus_mhz;
+EXPORT_SYMBOL(zbbus_mhz);
+
+static unsigned int part_type;
+
+static char *soc_str;
+static char *pass_str;
+
+static int __init 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:
+ printk("Unknown %s rev %x\n", soc_str, soc_pass);
+ periph_rev = 1;
+ pass_str = "Unknown Revision";
+ break;
+ }
+
+ return ret;
+}
+
+/* Setup code likely to be common to all SiByte platforms */
+
+static int __init 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:
+ printk("Unknown part type %x\n", part_type);
+ ret = 1;
+ break;
+ }
+
+ return ret;
+}
+
+void __init bcm1480_setup(void)
+{
+ uint64_t sys_rev;
+ int plldiv;
+
+ sb1_pass = read_c0_prid() & PRID_REV_MASK;
+ 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()) {
+ printk("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);
+
+ printk("Broadcom SiByte %s %s @ %d MHz (SB-1A rev %d)\n",
+ soc_str, pass_str, zbbus_mhz * 2, sb1_pass);
+ printk("Board type: %s\n", get_system_type());
+}
diff --git a/kernel/arch/mips/sibyte/bcm1480/smp.c b/kernel/arch/mips/sibyte/bcm1480/smp.c
new file mode 100644
index 000000000..af7d44edd
--- /dev/null
+++ b/kernel/arch/mips/sibyte/bcm1480/smp.c
@@ -0,0 +1,189 @@
+/*
+ * 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 <linux/sched.h>
+
+#include <asm/mmu_context.h>
+#include <asm/io.h>
+#include <asm/fw/cfe/cfe_api.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);
+}
+
+/*
+ * 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
+ */
+static void bcm1480_send_ipi_single(int cpu, unsigned int action)
+{
+ __raw_writeq((((u64)action)<< 48), mailbox_0_set_regs[cpu]);
+}
+
+static void bcm1480_send_ipi_mask(const struct cpumask *mask,
+ unsigned int action)
+{
+ unsigned int i;
+
+ for_each_cpu(i, mask)
+ bcm1480_send_ipi_single(i, action);
+}
+
+/*
+ * Code to run on secondary just after probing the CPU
+ */
+static void bcm1480_init_secondary(void)
+{
+ extern void bcm1480_smp_init(void);
+
+ bcm1480_smp_init();
+}
+
+/*
+ * Do any tidying up before marking online and running the idle
+ * loop
+ */
+static void bcm1480_smp_finish(void)
+{
+ extern void sb1480_clockevent_init(void);
+
+ sb1480_clockevent_init();
+ local_irq_enable();
+}
+
+/*
+ * Setup the PC, SP, and GP of a secondary processor and start it
+ * running!
+ */
+static void bcm1480_boot_secondary(int cpu, struct task_struct *idle)
+{
+ int retval;
+
+ retval = cfe_cpu_start(cpu_logical_map(cpu), &smp_bootstrap,
+ __KSTK_TOS(idle),
+ (unsigned long)task_thread_info(idle), 0);
+ if (retval != 0)
+ printk("cfe_start_cpu(%i) returned %i\n" , cpu, retval);
+}
+
+/*
+ * Use CFE to find out how many CPUs are available, setting up
+ * cpu_possible_mask and the logical/physical mappings.
+ * XXXKW will the boot CPU ever not be physical 0?
+ *
+ * Common setup before any secondaries are started
+ */
+static void __init bcm1480_smp_setup(void)
+{
+ int i, num;
+
+ init_cpu_possible(cpumask_of(0));
+ __cpu_number_map[0] = 0;
+ __cpu_logical_map[0] = 0;
+
+ for (i = 1, num = 0; i < NR_CPUS; i++) {
+ if (cfe_cpu_stop(i) == 0) {
+ set_cpu_possible(i, true);
+ __cpu_number_map[i] = ++num;
+ __cpu_logical_map[num] = i;
+ }
+ }
+ printk(KERN_INFO "Detected %i available secondary CPU(s)\n", num);
+}
+
+static void __init bcm1480_prepare_cpus(unsigned int max_cpus)
+{
+}
+
+struct plat_smp_ops bcm1480_smp_ops = {
+ .send_ipi_single = bcm1480_send_ipi_single,
+ .send_ipi_mask = bcm1480_send_ipi_mask,
+ .init_secondary = bcm1480_init_secondary,
+ .smp_finish = bcm1480_smp_finish,
+ .boot_secondary = bcm1480_boot_secondary,
+ .smp_setup = bcm1480_smp_setup,
+ .prepare_cpus = bcm1480_prepare_cpus,
+};
+
+void bcm1480_mailbox_interrupt(void)
+{
+ int cpu = smp_processor_id();
+ int irq = K_BCM1480_INT_MBOX_0_0;
+ unsigned int action;
+
+ kstat_incr_irq_this_cpu(irq);
+ /* 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]);
+
+ if (action & SMP_RESCHEDULE_YOURSELF)
+ scheduler_ipi();
+
+ if (action & SMP_CALL_FUNCTION)
+ smp_call_function_interrupt();
+}
diff --git a/kernel/arch/mips/sibyte/bcm1480/time.c b/kernel/arch/mips/sibyte/bcm1480/time.c
new file mode 100644
index 000000000..1680a6895
--- /dev/null
+++ b/kernel/arch/mips/sibyte/bcm1480/time.c
@@ -0,0 +1,27 @@
+/*
+ * 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.
+ */
+#include <linux/init.h>
+
+extern void sb1480_clockevent_init(void);
+extern void sb1480_clocksource_init(void);
+
+void __init plat_time_init(void)
+{
+ sb1480_clocksource_init();
+ sb1480_clockevent_init();
+}