config SMP
bool "Multi-Processing support"
- depends on CPU_RM9000 || (SIBYTE_SB1250 && !SIBYTE_STANDALONE) || SGI_IP27 || MIPS_MT_SMP
+ depends on CPU_RM9000 || ((SIBYTE_BCM1x80 || SIBYTE_BCM1x55 || SIBYTE_SB1250) && !SIBYTE_STANDALONE) || SGI_IP27 || MIPS_MT_SMP
---help---
This enables support for systems with more than one CPU. If you have
a system with only one CPU, like most personal computers, say N. If
# removed (as happens, even if they have __initcall/module_init)
#
core-$(CONFIG_SIBYTE_BCM112X) += arch/mips/sibyte/sb1250/
-cflags-$(CONFIG_SIBYTE_BCM112X) += -Iinclude/asm-mips/mach-sibyte
+cflags-$(CONFIG_SIBYTE_BCM112X) += -Iinclude/asm-mips/mach-sibyte \
+ -DSIBYTE_HDR_FEATURES=SIBYTE_HDR_FMASK_1250_112x_ALL
core-$(CONFIG_SIBYTE_SB1250) += arch/mips/sibyte/sb1250/
-cflags-$(CONFIG_SIBYTE_SB1250) += -Iinclude/asm-mips/mach-sibyte
+cflags-$(CONFIG_SIBYTE_SB1250) += -Iinclude/asm-mips/mach-sibyte \
+ -DSIBYTE_HDR_FEATURES=SIBYTE_HDR_FMASK_1250_112x_ALL
+
+core-$(CONFIG_SIBYTE_BCM1x55) += arch/mips/sibyte/bcm1480/
+cflags-$(CONFIG_SIBYTE_BCM1x55) += -Iinclude/asm-mips/mach-sibyte \
+ -DSIBYTE_HDR_FEATURES=SIBYTE_HDR_FMASK_1480_ALL
+
+core-$(CONFIG_SIBYTE_BCM1x80) += arch/mips/sibyte/bcm1480/
+cflags-$(CONFIG_SIBYTE_BCM1x80) += -Iinclude/asm-mips/mach-sibyte \
+ -DSIBYTE_HDR_FEATURES=SIBYTE_HDR_FMASK_1480_ALL
#
# Sibyte BCM91120x (Carmel) board
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
--- /dev/null
+obj-y := setup.o irq.o irq_handler.o time.o
+
+obj-$(CONFIG_SMP) += smp.o
+
+EXTRA_AFLAGS := $(CFLAGS)
--- /dev/null
+/*
+ * 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(®s->cp0_epc);
+}
+
+#endif /* CONFIG_KGDB */
--- /dev/null
+/*
+ * 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)
--- /dev/null
+/*
+ * 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());
+}
--- /dev/null
+/*
+ * 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();
+}
--- /dev/null
+/*
+ * 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;
+}
*/
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
}
/*
*/
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
}
/*
/*
- * 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
#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);
*/
/* 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)
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. */
projects / linux-2.6 / commitdiff