+++ /dev/null
-#include <linux/types.h>
-#include <asm/delay.h>
-#include <irq.h>
-#include <hwregs/intr_vect.h>
-#include <hwregs/intr_vect_defs.h>
-#include <asm/tlbflush.h>
-#include <asm/mmu_context.h>
-#include <hwregs/asm/mmu_defs_asm.h>
-#include <hwregs/supp_reg.h>
-#include <linux/atomic.h>
-
-#include <linux/err.h>
-#include <linux/init.h>
-#include <linux/timex.h>
-#include <linux/sched.h>
-#include <linux/kernel.h>
-#include <linux/cpumask.h>
-#include <linux/interrupt.h>
-#include <linux/module.h>
-
-#define IPI_SCHEDULE 1
-#define IPI_CALL 2
-#define IPI_FLUSH_TLB 4
-#define IPI_BOOT 8
-
-#define FLUSH_ALL (void*)0xffffffff
-
-/* Vector of locks used for various atomic operations */
-spinlock_t cris_atomic_locks[] = {
- [0 ... LOCK_COUNT - 1] = __SPIN_LOCK_UNLOCKED(cris_atomic_locks)
-};
-
-/* CPU masks */
-cpumask_t phys_cpu_present_map = CPU_MASK_NONE;
-EXPORT_SYMBOL(phys_cpu_present_map);
-
-/* Variables used during SMP boot */
-volatile int cpu_now_booting = 0;
-volatile struct thread_info *smp_init_current_idle_thread;
-
-/* Variables used during IPI */
-static DEFINE_SPINLOCK(call_lock);
-static DEFINE_SPINLOCK(tlbstate_lock);
-
-struct call_data_struct {
- void (*func) (void *info);
- void *info;
- int wait;
-};
-
-static struct call_data_struct * call_data;
-
-static struct mm_struct* flush_mm;
-static struct vm_area_struct* flush_vma;
-static unsigned long flush_addr;
-
-/* Mode registers */
-static unsigned long irq_regs[NR_CPUS] = {
- regi_irq,
- regi_irq2
-};
-
-static irqreturn_t crisv32_ipi_interrupt(int irq, void *dev_id);
-static int send_ipi(int vector, int wait, cpumask_t cpu_mask);
-static struct irqaction irq_ipi = {
- .handler = crisv32_ipi_interrupt,
- .flags = 0,
- .name = "ipi",
-};
-
-extern void cris_mmu_init(void);
-extern void cris_timer_init(void);
-
-/* SMP initialization */
-void __init smp_prepare_cpus(unsigned int max_cpus)
-{
- int i;
-
- /* From now on we can expect IPIs so set them up */
- setup_irq(IPI_INTR_VECT, &irq_ipi);
-
- /* Mark all possible CPUs as present */
- for (i = 0; i < max_cpus; i++)
- cpumask_set_cpu(i, &phys_cpu_present_map);
-}
-
-void smp_prepare_boot_cpu(void)
-{
- /* PGD pointer has moved after per_cpu initialization so
- * update the MMU.
- */
- pgd_t **pgd;
- pgd = (pgd_t**)&per_cpu(current_pgd, smp_processor_id());
-
- SUPP_BANK_SEL(1);
- SUPP_REG_WR(RW_MM_TLB_PGD, pgd);
- SUPP_BANK_SEL(2);
- SUPP_REG_WR(RW_MM_TLB_PGD, pgd);
-
- set_cpu_online(0, true);
- cpumask_set_cpu(0, &phys_cpu_present_map);
- set_cpu_possible(0, true);
-}
-
-void __init smp_cpus_done(unsigned int max_cpus)
-{
-}
-
-/* Bring one cpu online.*/
-static int __init
-smp_boot_one_cpu(int cpuid, struct task_struct idle)
-{
- unsigned timeout;
- cpumask_t cpu_mask;
-
- cpumask_clear(&cpu_mask);
- task_thread_info(idle)->cpu = cpuid;
-
- /* Information to the CPU that is about to boot */
- smp_init_current_idle_thread = task_thread_info(idle);
- cpu_now_booting = cpuid;
-
- /* Kick it */
- set_cpu_online(cpuid, true);
- cpumask_set_cpu(cpuid, &cpu_mask);
- send_ipi(IPI_BOOT, 0, cpu_mask);
- set_cpu_online(cpuid, false);
-
- /* Wait for CPU to come online */
- for (timeout = 0; timeout < 10000; timeout++) {
- if(cpu_online(cpuid)) {
- cpu_now_booting = 0;
- smp_init_current_idle_thread = NULL;
- return 0; /* CPU online */
- }
- udelay(100);
- barrier();
- }
-
- printk(KERN_CRIT "SMP: CPU:%d is stuck.\n", cpuid);
- return -1;
-}
-
-/* Secondary CPUs starts using C here. Here we need to setup CPU
- * specific stuff such as the local timer and the MMU. */
-void __init smp_callin(void)
-{
- int cpu = cpu_now_booting;
- reg_intr_vect_rw_mask vect_mask = {0};
-
- /* Initialise the idle task for this CPU */
- atomic_inc(&init_mm.mm_count);
- current->active_mm = &init_mm;
-
- /* Set up MMU */
- cris_mmu_init();
- __flush_tlb_all();
-
- /* Setup local timer. */
- cris_timer_init();
-
- /* Enable IRQ and idle */
- REG_WR(intr_vect, irq_regs[cpu], rw_mask, vect_mask);
- crisv32_unmask_irq(IPI_INTR_VECT);
- crisv32_unmask_irq(TIMER0_INTR_VECT);
- preempt_disable();
- notify_cpu_starting(cpu);
- local_irq_enable();
-
- set_cpu_online(cpu, true);
- cpu_startup_entry(CPUHP_ONLINE);
-}
-
-/* Stop execution on this CPU.*/
-void stop_this_cpu(void* dummy)
-{
- local_irq_disable();
- asm volatile("halt");
-}
-
-/* Other calls */
-void smp_send_stop(void)
-{
- smp_call_function(stop_this_cpu, NULL, 0);
-}
-
-int setup_profiling_timer(unsigned int multiplier)
-{
- return -EINVAL;
-}
-
-
-/* cache_decay_ticks is used by the scheduler to decide if a process
- * is "hot" on one CPU. A higher value means a higher penalty to move
- * a process to another CPU. Our cache is rather small so we report
- * 1 tick.
- */
-unsigned long cache_decay_ticks = 1;
-
-int __cpu_up(unsigned int cpu, struct task_struct *tidle)
-{
- smp_boot_one_cpu(cpu, tidle);
- return cpu_online(cpu) ? 0 : -ENOSYS;
-}
-
-void smp_send_reschedule(int cpu)
-{
- cpumask_t cpu_mask;
- cpumask_clear(&cpu_mask);
- cpumask_set_cpu(cpu, &cpu_mask);
- send_ipi(IPI_SCHEDULE, 0, cpu_mask);
-}
-
-/* TLB flushing
- *
- * Flush needs to be done on the local CPU and on any other CPU that
- * may have the same mapping. The mm->cpu_vm_mask is used to keep track
- * of which CPUs that a specific process has been executed on.
- */
-void flush_tlb_common(struct mm_struct* mm, struct vm_area_struct* vma, unsigned long addr)
-{
- unsigned long flags;
- cpumask_t cpu_mask;
-
- spin_lock_irqsave(&tlbstate_lock, flags);
- cpu_mask = (mm == FLUSH_ALL ? cpu_all_mask : *mm_cpumask(mm));
- cpumask_clear_cpu(smp_processor_id(), &cpu_mask);
- flush_mm = mm;
- flush_vma = vma;
- flush_addr = addr;
- send_ipi(IPI_FLUSH_TLB, 1, cpu_mask);
- spin_unlock_irqrestore(&tlbstate_lock, flags);
-}
-
-void flush_tlb_all(void)
-{
- __flush_tlb_all();
- flush_tlb_common(FLUSH_ALL, FLUSH_ALL, 0);
-}
-
-void flush_tlb_mm(struct mm_struct *mm)
-{
- __flush_tlb_mm(mm);
- flush_tlb_common(mm, FLUSH_ALL, 0);
- /* No more mappings in other CPUs */
- cpumask_clear(mm_cpumask(mm));
- cpumask_set_cpu(smp_processor_id(), mm_cpumask(mm));
-}
-
-void flush_tlb_page(struct vm_area_struct *vma,
- unsigned long addr)
-{
- __flush_tlb_page(vma, addr);
- flush_tlb_common(vma->vm_mm, vma, addr);
-}
-
-/* Inter processor interrupts
- *
- * The IPIs are used for:
- * * Force a schedule on a CPU
- * * FLush TLB on other CPUs
- * * Call a function on other CPUs
- */
-
-int send_ipi(int vector, int wait, cpumask_t cpu_mask)
-{
- int i = 0;
- reg_intr_vect_rw_ipi ipi = REG_RD(intr_vect, irq_regs[i], rw_ipi);
- int ret = 0;
-
- /* Calculate CPUs to send to. */
- cpumask_and(&cpu_mask, &cpu_mask, cpu_online_mask);
-
- /* Send the IPI. */
- for_each_cpu(i, &cpu_mask)
- {
- ipi.vector |= vector;
- REG_WR(intr_vect, irq_regs[i], rw_ipi, ipi);
- }
-
- /* Wait for IPI to finish on other CPUS */
- if (wait) {
- for_each_cpu(i, &cpu_mask) {
- int j;
- for (j = 0 ; j < 1000; j++) {
- ipi = REG_RD(intr_vect, irq_regs[i], rw_ipi);
- if (!ipi.vector)
- break;
- udelay(100);
- }
-
- /* Timeout? */
- if (ipi.vector) {
- printk("SMP call timeout from %d to %d\n", smp_processor_id(), i);
- ret = -ETIMEDOUT;
- dump_stack();
- }
- }
- }
- return ret;
-}
-
-/*
- * You must not call this function with disabled interrupts or from a
- * hardware interrupt handler or from a bottom half handler.
- */
-int smp_call_function(void (*func)(void *info), void *info, int wait)
-{
- cpumask_t cpu_mask;
- struct call_data_struct data;
- int ret;
-
- cpumask_setall(&cpu_mask);
- cpumask_clear_cpu(smp_processor_id(), &cpu_mask);
-
- WARN_ON(irqs_disabled());
-
- data.func = func;
- data.info = info;
- data.wait = wait;
-
- spin_lock(&call_lock);
- call_data = &data;
- ret = send_ipi(IPI_CALL, wait, cpu_mask);
- spin_unlock(&call_lock);
-
- return ret;
-}
-
-irqreturn_t crisv32_ipi_interrupt(int irq, void *dev_id)
-{
- void (*func) (void *info) = call_data->func;
- void *info = call_data->info;
- reg_intr_vect_rw_ipi ipi;
-
- ipi = REG_RD(intr_vect, irq_regs[smp_processor_id()], rw_ipi);
-
- if (ipi.vector & IPI_SCHEDULE) {
- scheduler_ipi();
- }
- if (ipi.vector & IPI_CALL) {
- func(info);
- }
- if (ipi.vector & IPI_FLUSH_TLB) {
- if (flush_mm == FLUSH_ALL)
- __flush_tlb_all();
- else if (flush_vma == FLUSH_ALL)
- __flush_tlb_mm(flush_mm);
- else
- __flush_tlb_page(flush_vma, flush_addr);
- }
-
- ipi.vector = 0;
- REG_WR(intr_vect, irq_regs[smp_processor_id()], rw_ipi, ipi);
-
- return IRQ_HANDLED;
-}
-
+++ /dev/null
-#ifndef __ASM_ARCH_SPINLOCK_H
-#define __ASM_ARCH_SPINLOCK_H
-
-#include <linux/spinlock_types.h>
-
-#define RW_LOCK_BIAS 0x01000000
-
-extern void cris_spin_unlock(void *l, int val);
-extern void cris_spin_lock(void *l);
-extern int cris_spin_trylock(void *l);
-
-static inline int arch_spin_is_locked(arch_spinlock_t *x)
-{
- return *(volatile signed char *)(&(x)->slock) <= 0;
-}
-
-static inline void arch_spin_unlock(arch_spinlock_t *lock)
-{
- __asm__ volatile ("move.d %1,%0" \
- : "=m" (lock->slock) \
- : "r" (1) \
- : "memory");
-}
-
-static inline void arch_spin_unlock_wait(arch_spinlock_t *lock)
-{
- while (arch_spin_is_locked(lock))
- cpu_relax();
-}
-
-static inline int arch_spin_trylock(arch_spinlock_t *lock)
-{
- return cris_spin_trylock((void *)&lock->slock);
-}
-
-static inline void arch_spin_lock(arch_spinlock_t *lock)
-{
- cris_spin_lock((void *)&lock->slock);
-}
-
-static inline void
-arch_spin_lock_flags(arch_spinlock_t *lock, unsigned long flags)
-{
- arch_spin_lock(lock);
-}
-
-/*
- * Read-write spinlocks, allowing multiple readers
- * but only one writer.
- *
- * NOTE! it is quite common to have readers in interrupts
- * but no interrupt writers. For those circumstances we
- * can "mix" irq-safe locks - any writer needs to get a
- * irq-safe write-lock, but readers can get non-irqsafe
- * read-locks.
- *
- */
-
-static inline int arch_read_can_lock(arch_rwlock_t *x)
-{
- return (int)(x)->lock > 0;
-}
-
-static inline int arch_write_can_lock(arch_rwlock_t *x)
-{
- return (x)->lock == RW_LOCK_BIAS;
-}
-
-static inline void arch_read_lock(arch_rwlock_t *rw)
-{
- arch_spin_lock(&rw->slock);
- while (rw->lock == 0);
- rw->lock--;
- arch_spin_unlock(&rw->slock);
-}
-
-static inline void arch_write_lock(arch_rwlock_t *rw)
-{
- arch_spin_lock(&rw->slock);
- while (rw->lock != RW_LOCK_BIAS);
- rw->lock = 0;
- arch_spin_unlock(&rw->slock);
-}
-
-static inline void arch_read_unlock(arch_rwlock_t *rw)
-{
- arch_spin_lock(&rw->slock);
- rw->lock++;
- arch_spin_unlock(&rw->slock);
-}
-
-static inline void arch_write_unlock(arch_rwlock_t *rw)
-{
- arch_spin_lock(&rw->slock);
- while (rw->lock != RW_LOCK_BIAS);
- rw->lock = RW_LOCK_BIAS;
- arch_spin_unlock(&rw->slock);
-}
-
-static inline int arch_read_trylock(arch_rwlock_t *rw)
-{
- int ret = 0;
- arch_spin_lock(&rw->slock);
- if (rw->lock != 0) {
- rw->lock--;
- ret = 1;
- }
- arch_spin_unlock(&rw->slock);
- return ret;
-}
-
-static inline int arch_write_trylock(arch_rwlock_t *rw)
-{
- int ret = 0;
- arch_spin_lock(&rw->slock);
- if (rw->lock == RW_LOCK_BIAS) {
- rw->lock = 0;
- ret = 1;
- }
- arch_spin_unlock(&rw->slock);
- return ret;
-}
-
-#define _raw_read_lock_flags(lock, flags) _raw_read_lock(lock)
-#define _raw_write_lock_flags(lock, flags) _raw_write_lock(lock)
-
-#define arch_spin_relax(lock) cpu_relax()
-#define arch_read_relax(lock) cpu_relax()
-#define arch_write_relax(lock) cpu_relax()
-
-#endif /* __ASM_ARCH_SPINLOCK_H */
projects / cascardo / linux.git / commitdiff