diff options
Diffstat (limited to 'arch/mips')
| -rw-r--r-- | arch/mips/Kconfig | 2 | ||||
| -rw-r--r-- | arch/mips/Makefile | 14 | ||||
| -rw-r--r-- | arch/mips/sibyte/Kconfig | 10 | ||||
| -rw-r--r-- | arch/mips/sibyte/bcm1480/Makefile | 5 | ||||
| -rw-r--r-- | arch/mips/sibyte/bcm1480/irq.c | 476 | ||||
| -rw-r--r-- | arch/mips/sibyte/bcm1480/irq_handler.S | 165 | ||||
| -rw-r--r-- | arch/mips/sibyte/bcm1480/setup.c | 136 | ||||
| -rw-r--r-- | arch/mips/sibyte/bcm1480/smp.c | 110 | ||||
| -rw-r--r-- | arch/mips/sibyte/bcm1480/time.c | 138 | ||||
| -rw-r--r-- | arch/mips/sibyte/cfe/smp.c | 14 | ||||
| -rw-r--r-- | arch/mips/sibyte/swarm/setup.c | 28 |
11 files changed, 1093 insertions, 5 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index bafd7755380..fdeffc81e17 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -1429,7 +1429,7 @@ source "mm/Kconfig" 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 diff --git a/arch/mips/Makefile b/arch/mips/Makefile index 4d0645cb572..92e16157734 100644 --- a/arch/mips/Makefile +++ b/arch/mips/Makefile @@ -650,10 +650,20 @@ load-$(CONFIG_SGI_IP32) += 0xffffffff80004000 # removed (as happens, even if they have __initcall/module_init) # core-$(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-$(CONFIG_SIBYTE_BCM1x80) += -Iinclude/asm-mips/mach-sibyte \ + -DSIBYTE_HDR_FEATURES=SIBYTE_HDR_FMASK_1480_ALL # # Sibyte BCM91120x (Carmel) board diff --git a/arch/mips/sibyte/Kconfig b/arch/mips/sibyte/Kconfig index 3618d61f004..6a5a08f5e21 100644 --- a/arch/mips/sibyte/Kconfig +++ b/arch/mips/sibyte/Kconfig @@ -26,6 +26,16 @@ config SIBYTE_BCM112X bool select SIBYTE_SB1xxx_SOC +config SIBYTE_BCM1x80 + bool + select HW_HAS_PCI + select SIBYTE_SB1xxx_SOC + +config SIBYTE_BCM1x55 + bool + select HW_HAS_PCI + select SIBYTE_SB1xxx_SOC + config SIBYTE_SB1xxx_SOC bool depends on EXPERIMENTAL diff --git a/arch/mips/sibyte/bcm1480/Makefile b/arch/mips/sibyte/bcm1480/Makefile new file mode 100644 index 00000000000..538d5a51ae9 --- /dev/null +++ b/arch/mips/sibyte/bcm1480/Makefile @@ -0,0 +1,5 @@ +obj-y := setup.o irq.o irq_handler.o time.o + +obj-$(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 00000000000..b2a1ba5d23d --- /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(®s->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 00000000000..408db88d050 --- /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 00000000000..d90a0b87874 --- /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 00000000000..584a4b33faa --- /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 00000000000..e545752695a --- /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 e44ce1a9eea..e8485124b8f 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 f8963de1bbf..b614ca0ddb6 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. */ |