diff options
Diffstat (limited to 'arch/alpha/kernel/smp.c')
| -rw-r--r-- | arch/alpha/kernel/smp.c | 92 |
1 files changed, 26 insertions, 66 deletions
diff --git a/arch/alpha/kernel/smp.c b/arch/alpha/kernel/smp.c index 42aa078a5e4..99ac36d5de4 100644 --- a/arch/alpha/kernel/smp.c +++ b/arch/alpha/kernel/smp.c @@ -31,7 +31,7 @@ #include <asm/hwrpb.h> #include <asm/ptrace.h> -#include <asm/atomic.h> +#include <linux/atomic.h> #include <asm/io.h> #include <asm/irq.h> @@ -68,7 +68,7 @@ enum ipi_message_type { }; /* Set to a secondary's cpuid when it comes online. */ -static int smp_secondary_alive __devinitdata = 0; +static int smp_secondary_alive = 0; int smp_num_probed; /* Internal processor count */ int smp_num_cpus = 1; /* Number that came online. */ @@ -116,7 +116,7 @@ wait_boot_cpu_to_stop(int cpuid) /* * Where secondaries begin a life of C. */ -void __cpuinit +void smp_callin(void) { int cpuid = hard_smp_processor_id(); @@ -138,9 +138,11 @@ smp_callin(void) /* Get our local ticker going. */ smp_setup_percpu_timer(cpuid); + init_clockevent(); /* Call platform-specific callin, if specified */ - if (alpha_mv.smp_callin) alpha_mv.smp_callin(); + if (alpha_mv.smp_callin) + alpha_mv.smp_callin(); /* All kernel threads share the same mm context. */ atomic_inc(&init_mm.mm_count); @@ -166,12 +168,12 @@ smp_callin(void) DBGS(("smp_callin: commencing CPU %d current %p active_mm %p\n", cpuid, current, current->active_mm)); - /* Do nothing. */ - cpu_idle(); + preempt_disable(); + cpu_startup_entry(CPUHP_ONLINE); } /* Wait until hwrpb->txrdy is clear for cpu. Return -1 on timeout. */ -static int __devinit +static int wait_for_txrdy (unsigned long cpumask) { unsigned long timeout; @@ -194,7 +196,7 @@ wait_for_txrdy (unsigned long cpumask) * Send a message to a secondary's console. "START" is one such * interesting message. ;-) */ -static void __cpuinit +static void send_secondary_console_msg(char *str, int cpuid) { struct percpu_struct *cpu; @@ -264,9 +266,10 @@ recv_secondary_console_msg(void) if (cnt <= 0 || cnt >= 80) strcpy(buf, "<<< BOGUS MSG >>>"); else { - cp1 = (char *) &cpu->ipc_buffer[11]; + cp1 = (char *) &cpu->ipc_buffer[1]; cp2 = buf; - strcpy(cp2, cp1); + memcpy(cp2, cp1, cnt); + cp2[cnt] = '\0'; while ((cp2 = strchr(cp2, '\r')) != 0) { *cp2 = ' '; @@ -285,7 +288,7 @@ recv_secondary_console_msg(void) /* * Convince the console to have a secondary cpu begin execution. */ -static int __cpuinit +static int secondary_cpu_start(int cpuid, struct task_struct *idle) { struct percpu_struct *cpu; @@ -356,25 +359,11 @@ secondary_cpu_start(int cpuid, struct task_struct *idle) /* * Bring one cpu online. */ -static int __cpuinit -smp_boot_one_cpu(int cpuid) +static int +smp_boot_one_cpu(int cpuid, struct task_struct *idle) { - struct task_struct *idle; unsigned long timeout; - /* Cook up an idler for this guy. Note that the address we - give to kernel_thread is irrelevant -- it's going to start - where HWRPB.CPU_restart says to start. But this gets all - the other task-y sort of data structures set up like we - wish. We can't use kernel_thread since we must avoid - rescheduling the child. */ - idle = fork_idle(cpuid); - if (IS_ERR(idle)) - panic("failed fork for CPU %d", cpuid); - - DBGS(("smp_boot_one_cpu: CPU %d state 0x%lx flags 0x%lx\n", - cpuid, idle->state, idle->flags)); - /* Signal the secondary to wait a moment. */ smp_secondary_alive = -1; @@ -450,8 +439,8 @@ setup_smp(void) smp_num_probed = 1; } - printk(KERN_INFO "SMP: %d CPUs probed -- cpu_present_map = %lx\n", - smp_num_probed, cpu_present_map.bits[0]); + printk(KERN_INFO "SMP: %d CPUs probed -- cpu_present_mask = %lx\n", + smp_num_probed, cpumask_bits(cpu_present_mask)[0]); } /* @@ -481,15 +470,15 @@ smp_prepare_cpus(unsigned int max_cpus) smp_num_cpus = smp_num_probed; } -void __devinit +void smp_prepare_boot_cpu(void) { } -int __cpuinit -__cpu_up(unsigned int cpu) +int +__cpu_up(unsigned int cpu, struct task_struct *tidle) { - smp_boot_one_cpu(cpu); + smp_boot_one_cpu(cpu, tidle); return cpu_online(cpu) ? 0 : -ENOSYS; } @@ -511,35 +500,6 @@ smp_cpus_done(unsigned int max_cpus) ((bogosum + 2500) / (5000/HZ)) % 100); } - -void -smp_percpu_timer_interrupt(struct pt_regs *regs) -{ - struct pt_regs *old_regs; - int cpu = smp_processor_id(); - unsigned long user = user_mode(regs); - struct cpuinfo_alpha *data = &cpu_data[cpu]; - - old_regs = set_irq_regs(regs); - - /* Record kernel PC. */ - profile_tick(CPU_PROFILING); - - if (!--data->prof_counter) { - /* We need to make like a normal interrupt -- otherwise - timer interrupts ignore the global interrupt lock, - which would be a Bad Thing. */ - irq_enter(); - - update_process_times(user); - - data->prof_counter = data->prof_multiplier; - - irq_exit(); - } - set_irq_regs(old_regs); -} - int setup_profiling_timer(unsigned int multiplier) { @@ -585,8 +545,7 @@ handle_ipi(struct pt_regs *regs) switch (which) { case IPI_RESCHEDULE: - /* Reschedule callback. Everything to be done - is done by the interrupt return path. */ + scheduler_ipi(); break; case IPI_CALL_FUNC: @@ -630,8 +589,9 @@ smp_send_reschedule(int cpu) void smp_send_stop(void) { - cpumask_t to_whom = cpu_possible_map; - cpu_clear(smp_processor_id(), to_whom); + cpumask_t to_whom; + cpumask_copy(&to_whom, cpu_possible_mask); + cpumask_clear_cpu(smp_processor_id(), &to_whom); #ifdef DEBUG_IPI_MSG if (hard_smp_processor_id() != boot_cpu_id) printk(KERN_WARNING "smp_send_stop: Not on boot cpu.\n"); |