diff options
Diffstat (limited to 'arch/mips/kernel')
| -rw-r--r-- | arch/mips/kernel/Makefile | 2 | ||||
| -rw-r--r-- | arch/mips/kernel/gdb-stub.c | 3 | ||||
| -rw-r--r-- | arch/mips/kernel/i8253.c | 1 | ||||
| -rw-r--r-- | arch/mips/kernel/semaphore.c | 168 | ||||
| -rw-r--r-- | arch/mips/kernel/time.c | 2 | ||||
| -rw-r--r-- | arch/mips/kernel/vpe.c | 21 |
6 files changed, 20 insertions, 177 deletions
diff --git a/arch/mips/kernel/Makefile b/arch/mips/kernel/Makefile index 9e78e1a4ca1..6fcdb6fda2e 100644 --- a/arch/mips/kernel/Makefile +++ b/arch/mips/kernel/Makefile @@ -5,7 +5,7 @@ extra-y := head.o init_task.o vmlinux.lds obj-y += cpu-probe.o branch.o entry.o genex.o irq.o process.o \ - ptrace.o reset.o semaphore.o setup.o signal.o syscall.o \ + ptrace.o reset.o setup.o signal.o syscall.o \ time.o topology.o traps.o unaligned.o obj-$(CONFIG_CEVT_BCM1480) += cevt-bcm1480.o diff --git a/arch/mips/kernel/gdb-stub.c b/arch/mips/kernel/gdb-stub.c index 3191afa29ad..25f4eab8ea9 100644 --- a/arch/mips/kernel/gdb-stub.c +++ b/arch/mips/kernel/gdb-stub.c @@ -139,7 +139,6 @@ #include <asm/system.h> #include <asm/gdb-stub.h> #include <asm/inst.h> -#include <asm/smp.h> /* * external low-level support routines @@ -656,6 +655,7 @@ void set_async_breakpoint(unsigned long *epc) *epc = (unsigned long)async_breakpoint; } +#ifdef CONFIG_SMP static void kgdb_wait(void *arg) { unsigned flags; @@ -668,6 +668,7 @@ static void kgdb_wait(void *arg) local_irq_restore(flags); } +#endif /* * GDB stub needs to call kgdb_wait on all processor with interrupts diff --git a/arch/mips/kernel/i8253.c b/arch/mips/kernel/i8253.c index fc4aa07b6d3..38fa1a194bf 100644 --- a/arch/mips/kernel/i8253.c +++ b/arch/mips/kernel/i8253.c @@ -15,6 +15,7 @@ #include <asm/time.h> DEFINE_SPINLOCK(i8253_lock); +EXPORT_SYMBOL(i8253_lock); /* * Initialize the PIT timer. diff --git a/arch/mips/kernel/semaphore.c b/arch/mips/kernel/semaphore.c deleted file mode 100644 index 1265358cdca..00000000000 --- a/arch/mips/kernel/semaphore.c +++ /dev/null @@ -1,168 +0,0 @@ -/* - * MIPS-specific semaphore code. - * - * Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu> - * Copyright (C) 2004 Ralf Baechle <ralf@linux-mips.org> - * - * 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. - * - * April 2001 - Reworked by Paul Mackerras <paulus@samba.org> - * to eliminate the SMP races in the old version between the updates - * of `count' and `waking'. Now we use negative `count' values to - * indicate that some process(es) are waiting for the semaphore. - */ - -#include <linux/module.h> -#include <linux/sched.h> -#include <linux/init.h> -#include <asm/atomic.h> -#include <asm/cpu-features.h> -#include <asm/errno.h> -#include <asm/semaphore.h> -#include <asm/war.h> -/* - * Atomically update sem->count. - * This does the equivalent of the following: - * - * old_count = sem->count; - * tmp = MAX(old_count, 0) + incr; - * sem->count = tmp; - * return old_count; - * - * On machines without lld/scd we need a spinlock to make the manipulation of - * sem->count and sem->waking atomic. Scalability isn't an issue because - * this lock is used on UP only so it's just an empty variable. - */ -static inline int __sem_update_count(struct semaphore *sem, int incr) -{ - int old_count, tmp; - - if (cpu_has_llsc && R10000_LLSC_WAR) { - __asm__ __volatile__( - " .set mips3 \n" - "1: ll %0, %2 # __sem_update_count \n" - " sra %1, %0, 31 \n" - " not %1 \n" - " and %1, %0, %1 \n" - " addu %1, %1, %3 \n" - " sc %1, %2 \n" - " beqzl %1, 1b \n" - " .set mips0 \n" - : "=&r" (old_count), "=&r" (tmp), "=m" (sem->count) - : "r" (incr), "m" (sem->count)); - } else if (cpu_has_llsc) { - __asm__ __volatile__( - " .set mips3 \n" - "1: ll %0, %2 # __sem_update_count \n" - " sra %1, %0, 31 \n" - " not %1 \n" - " and %1, %0, %1 \n" - " addu %1, %1, %3 \n" - " sc %1, %2 \n" - " beqz %1, 1b \n" - " .set mips0 \n" - : "=&r" (old_count), "=&r" (tmp), "=m" (sem->count) - : "r" (incr), "m" (sem->count)); - } else { - static DEFINE_SPINLOCK(semaphore_lock); - unsigned long flags; - - spin_lock_irqsave(&semaphore_lock, flags); - old_count = atomic_read(&sem->count); - tmp = max_t(int, old_count, 0) + incr; - atomic_set(&sem->count, tmp); - spin_unlock_irqrestore(&semaphore_lock, flags); - } - - return old_count; -} - -void __up(struct semaphore *sem) -{ - /* - * Note that we incremented count in up() before we came here, - * but that was ineffective since the result was <= 0, and - * any negative value of count is equivalent to 0. - * This ends up setting count to 1, unless count is now > 0 - * (i.e. because some other cpu has called up() in the meantime), - * in which case we just increment count. - */ - __sem_update_count(sem, 1); - wake_up(&sem->wait); -} - -EXPORT_SYMBOL(__up); - -/* - * Note that when we come in to __down or __down_interruptible, - * we have already decremented count, but that decrement was - * ineffective since the result was < 0, and any negative value - * of count is equivalent to 0. - * Thus it is only when we decrement count from some value > 0 - * that we have actually got the semaphore. - */ -void __sched __down(struct semaphore *sem) -{ - struct task_struct *tsk = current; - DECLARE_WAITQUEUE(wait, tsk); - - __set_task_state(tsk, TASK_UNINTERRUPTIBLE); - add_wait_queue_exclusive(&sem->wait, &wait); - - /* - * Try to get the semaphore. If the count is > 0, then we've - * got the semaphore; we decrement count and exit the loop. - * If the count is 0 or negative, we set it to -1, indicating - * that we are asleep, and then sleep. - */ - while (__sem_update_count(sem, -1) <= 0) { - schedule(); - set_task_state(tsk, TASK_UNINTERRUPTIBLE); - } - remove_wait_queue(&sem->wait, &wait); - __set_task_state(tsk, TASK_RUNNING); - - /* - * If there are any more sleepers, wake one of them up so - * that it can either get the semaphore, or set count to -1 - * indicating that there are still processes sleeping. - */ - wake_up(&sem->wait); -} - -EXPORT_SYMBOL(__down); - -int __sched __down_interruptible(struct semaphore * sem) -{ - int retval = 0; - struct task_struct *tsk = current; - DECLARE_WAITQUEUE(wait, tsk); - - __set_task_state(tsk, TASK_INTERRUPTIBLE); - add_wait_queue_exclusive(&sem->wait, &wait); - - while (__sem_update_count(sem, -1) <= 0) { - if (signal_pending(current)) { - /* - * A signal is pending - give up trying. - * Set sem->count to 0 if it is negative, - * since we are no longer sleeping. - */ - __sem_update_count(sem, 0); - retval = -EINTR; - break; - } - schedule(); - set_task_state(tsk, TASK_INTERRUPTIBLE); - } - remove_wait_queue(&sem->wait, &wait); - __set_task_state(tsk, TASK_RUNNING); - - wake_up(&sem->wait); - return retval; -} - -EXPORT_SYMBOL(__down_interruptible); diff --git a/arch/mips/kernel/time.c b/arch/mips/kernel/time.c index 9f85d4cecc5..b45a7093ca2 100644 --- a/arch/mips/kernel/time.c +++ b/arch/mips/kernel/time.c @@ -157,6 +157,6 @@ void __init time_init(void) { plat_time_init(); - if (mips_clockevent_init() || !cpu_has_mfc0_count_bug()) + if (!mips_clockevent_init() || !cpu_has_mfc0_count_bug()) init_mips_clocksource(); } diff --git a/arch/mips/kernel/vpe.c b/arch/mips/kernel/vpe.c index eed2dc4273e..39804c584ed 100644 --- a/arch/mips/kernel/vpe.c +++ b/arch/mips/kernel/vpe.c @@ -262,13 +262,21 @@ void dump_mtregs(void) /* Find some VPE program space */ static void *alloc_progmem(unsigned long len) { + void *addr; + #ifdef CONFIG_MIPS_VPE_LOADER_TOM - /* this means you must tell linux to use less memory than you physically have */ - return pfn_to_kaddr(max_pfn); + /* + * This means you must tell Linux to use less memory than you + * physically have, for example by passing a mem= boot argument. + */ + addr = pfn_to_kaddr(max_pfn); + memset(addr, 0, len); #else - // simple grab some mem for now - return kmalloc(len, GFP_KERNEL); + /* simple grab some mem for now */ + addr = kzalloc(len, GFP_KERNEL); #endif + + return addr; } static void release_progmem(void *ptr) @@ -884,9 +892,10 @@ static int vpe_elfload(struct vpe * v) } v->load_addr = alloc_progmem(mod.core_size); - memset(v->load_addr, 0, mod.core_size); + if (!v->load_addr) + return -ENOMEM; - printk("VPE loader: loading to %p\n", v->load_addr); + pr_info("VPE loader: loading to %p\n", v->load_addr); if (relocate) { for (i = 0; i < hdr->e_shnum; i++) { |