diff options
Diffstat (limited to 'arch/mips/kernel')
-rw-r--r-- | arch/mips/kernel/Makefile | 1 | ||||
-rw-r--r-- | arch/mips/kernel/asm-offsets.c | 4 | ||||
-rw-r--r-- | arch/mips/kernel/cevt-gt641xx.c | 10 | ||||
-rw-r--r-- | arch/mips/kernel/cpu-probe.c | 30 | ||||
-rw-r--r-- | arch/mips/kernel/ftrace.c | 2 | ||||
-rw-r--r-- | arch/mips/kernel/i8259.c | 22 | ||||
-rw-r--r-- | arch/mips/kernel/irq-gt641xx.c | 18 | ||||
-rw-r--r-- | arch/mips/kernel/linux32.c | 1 | ||||
-rw-r--r-- | arch/mips/kernel/mcount.S | 2 | ||||
-rw-r--r-- | arch/mips/kernel/octeon_switch.S | 1 | ||||
-rw-r--r-- | arch/mips/kernel/rtlx.c | 1 | ||||
-rw-r--r-- | arch/mips/kernel/spinlock_test.c | 141 | ||||
-rw-r--r-- | arch/mips/kernel/traps.c | 23 | ||||
-rw-r--r-- | arch/mips/kernel/vpe.c | 1 |
14 files changed, 212 insertions, 45 deletions
diff --git a/arch/mips/kernel/Makefile b/arch/mips/kernel/Makefile index 9326af5186f..ef20957ca14 100644 --- a/arch/mips/kernel/Makefile +++ b/arch/mips/kernel/Makefile @@ -93,6 +93,7 @@ obj-$(CONFIG_GPIO_TXX9) += gpio_txx9.o obj-$(CONFIG_KEXEC) += machine_kexec.o relocate_kernel.o obj-$(CONFIG_EARLY_PRINTK) += early_printk.o +obj-$(CONFIG_SPINLOCK_TEST) += spinlock_test.o CFLAGS_cpu-bugs64.o = $(shell if $(CC) $(KBUILD_CFLAGS) -Wa,-mdaddi -c -o /dev/null -xc /dev/null >/dev/null 2>&1; then echo "-DHAVE_AS_SET_DADDI"; fi) diff --git a/arch/mips/kernel/asm-offsets.c b/arch/mips/kernel/asm-offsets.c index 2c1e1d02338..ca6c83218ca 100644 --- a/arch/mips/kernel/asm-offsets.c +++ b/arch/mips/kernel/asm-offsets.c @@ -188,11 +188,15 @@ void output_mm_defines(void) DEFINE(_PTE_T_SIZE, sizeof(pte_t)); BLANK(); DEFINE(_PGD_T_LOG2, PGD_T_LOG2); +#ifndef __PAGETABLE_PMD_FOLDED DEFINE(_PMD_T_LOG2, PMD_T_LOG2); +#endif DEFINE(_PTE_T_LOG2, PTE_T_LOG2); BLANK(); DEFINE(_PGD_ORDER, PGD_ORDER); +#ifndef __PAGETABLE_PMD_FOLDED DEFINE(_PMD_ORDER, PMD_ORDER); +#endif DEFINE(_PTE_ORDER, PTE_ORDER); BLANK(); DEFINE(_PMD_SHIFT, PMD_SHIFT); diff --git a/arch/mips/kernel/cevt-gt641xx.c b/arch/mips/kernel/cevt-gt641xx.c index f5d265eb6ea..392ef3756c5 100644 --- a/arch/mips/kernel/cevt-gt641xx.c +++ b/arch/mips/kernel/cevt-gt641xx.c @@ -25,7 +25,7 @@ #include <asm/gt64120.h> #include <asm/time.h> -static DEFINE_SPINLOCK(gt641xx_timer_lock); +static DEFINE_RAW_SPINLOCK(gt641xx_timer_lock); static unsigned int gt641xx_base_clock; void gt641xx_set_base_clock(unsigned int clock) @@ -49,7 +49,7 @@ static int gt641xx_timer0_set_next_event(unsigned long delta, { u32 ctrl; - spin_lock(>641xx_timer_lock); + raw_spin_lock(>641xx_timer_lock); ctrl = GT_READ(GT_TC_CONTROL_OFS); ctrl &= ~(GT_TC_CONTROL_ENTC0_MSK | GT_TC_CONTROL_SELTC0_MSK); @@ -58,7 +58,7 @@ static int gt641xx_timer0_set_next_event(unsigned long delta, GT_WRITE(GT_TC0_OFS, delta); GT_WRITE(GT_TC_CONTROL_OFS, ctrl); - spin_unlock(>641xx_timer_lock); + raw_spin_unlock(>641xx_timer_lock); return 0; } @@ -68,7 +68,7 @@ static void gt641xx_timer0_set_mode(enum clock_event_mode mode, { u32 ctrl; - spin_lock(>641xx_timer_lock); + raw_spin_lock(>641xx_timer_lock); ctrl = GT_READ(GT_TC_CONTROL_OFS); ctrl &= ~(GT_TC_CONTROL_ENTC0_MSK | GT_TC_CONTROL_SELTC0_MSK); @@ -86,7 +86,7 @@ static void gt641xx_timer0_set_mode(enum clock_event_mode mode, GT_WRITE(GT_TC_CONTROL_OFS, ctrl); - spin_unlock(>641xx_timer_lock); + raw_spin_unlock(>641xx_timer_lock); } static void gt641xx_timer0_event_handler(struct clock_event_device *dev) diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c index 758ad426c57..be5bb16be4e 100644 --- a/arch/mips/kernel/cpu-probe.c +++ b/arch/mips/kernel/cpu-probe.c @@ -162,6 +162,7 @@ void __init check_wait(void) case CPU_BCM6348: case CPU_BCM6358: case CPU_CAVIUM_OCTEON: + case CPU_CAVIUM_OCTEON_PLUS: cpu_wait = r4k_wait; break; @@ -700,6 +701,19 @@ static inline unsigned int decode_config3(struct cpuinfo_mips *c) return config3 & MIPS_CONF_M; } +static inline unsigned int decode_config4(struct cpuinfo_mips *c) +{ + unsigned int config4; + + config4 = read_c0_config4(); + + if ((config4 & MIPS_CONF4_MMUEXTDEF) == MIPS_CONF4_MMUEXTDEF_MMUSIZEEXT + && cpu_has_tlb) + c->tlbsize += (config4 & MIPS_CONF4_MMUSIZEEXT) * 0x40; + + return config4 & MIPS_CONF_M; +} + static void __cpuinit decode_configs(struct cpuinfo_mips *c) { int ok; @@ -718,6 +732,8 @@ static void __cpuinit decode_configs(struct cpuinfo_mips *c) ok = decode_config2(c); if (ok) ok = decode_config3(c); + if (ok) + ok = decode_config4(c); mips_probe_watch_registers(c); } @@ -731,9 +747,6 @@ static inline void cpu_probe_mips(struct cpuinfo_mips *c, unsigned int cpu) __cpu_name[cpu] = "MIPS 4Kc"; break; case PRID_IMP_4KEC: - c->cputype = CPU_4KEC; - __cpu_name[cpu] = "MIPS 4KEc"; - break; case PRID_IMP_4KECR2: c->cputype = CPU_4KEC; __cpu_name[cpu] = "MIPS 4KEc"; @@ -899,12 +912,18 @@ static inline void cpu_probe_cavium(struct cpuinfo_mips *c, unsigned int cpu) case PRID_IMP_CAVIUM_CN38XX: case PRID_IMP_CAVIUM_CN31XX: case PRID_IMP_CAVIUM_CN30XX: + c->cputype = CPU_CAVIUM_OCTEON; + __cpu_name[cpu] = "Cavium Octeon"; + goto platform; case PRID_IMP_CAVIUM_CN58XX: case PRID_IMP_CAVIUM_CN56XX: case PRID_IMP_CAVIUM_CN50XX: case PRID_IMP_CAVIUM_CN52XX: - c->cputype = CPU_CAVIUM_OCTEON; - __cpu_name[cpu] = "Cavium Octeon"; + c->cputype = CPU_CAVIUM_OCTEON_PLUS; + __cpu_name[cpu] = "Cavium Octeon+"; +platform: + if (cpu == 0) + __elf_platform = "octeon"; break; default: printk(KERN_INFO "Unknown Octeon chip!\n"); @@ -914,6 +933,7 @@ static inline void cpu_probe_cavium(struct cpuinfo_mips *c, unsigned int cpu) } const char *__cpu_name[NR_CPUS]; +const char *__elf_platform; __cpuinit void cpu_probe(void) { diff --git a/arch/mips/kernel/ftrace.c b/arch/mips/kernel/ftrace.c index 68b067040d8..e9e64e0ff7a 100644 --- a/arch/mips/kernel/ftrace.c +++ b/arch/mips/kernel/ftrace.c @@ -3,7 +3,7 @@ * * Copyright (C) 2007-2008 Steven Rostedt <srostedt@redhat.com> * Copyright (C) 2009 DSLab, Lanzhou University, China - * Author: Wu Zhangjin <wuzj@lemote.com> + * Author: Wu Zhangjin <wuzhangjin@gmail.com> * * Thanks goes to Steven Rostedt for writing the original x86 version. */ diff --git a/arch/mips/kernel/i8259.c b/arch/mips/kernel/i8259.c index 01c0885a806..27799113332 100644 --- a/arch/mips/kernel/i8259.c +++ b/arch/mips/kernel/i8259.c @@ -29,7 +29,7 @@ */ static int i8259A_auto_eoi = -1; -DEFINE_SPINLOCK(i8259A_lock); +DEFINE_RAW_SPINLOCK(i8259A_lock); static void disable_8259A_irq(unsigned int irq); static void enable_8259A_irq(unsigned int irq); static void mask_and_ack_8259A(unsigned int irq); @@ -65,13 +65,13 @@ static void disable_8259A_irq(unsigned int irq) irq -= I8259A_IRQ_BASE; mask = 1 << irq; - spin_lock_irqsave(&i8259A_lock, flags); + raw_spin_lock_irqsave(&i8259A_lock, flags); cached_irq_mask |= mask; if (irq & 8) outb(cached_slave_mask, PIC_SLAVE_IMR); else outb(cached_master_mask, PIC_MASTER_IMR); - spin_unlock_irqrestore(&i8259A_lock, flags); + raw_spin_unlock_irqrestore(&i8259A_lock, flags); } static void enable_8259A_irq(unsigned int irq) @@ -81,13 +81,13 @@ static void enable_8259A_irq(unsigned int irq) irq -= I8259A_IRQ_BASE; mask = ~(1 << irq); - spin_lock_irqsave(&i8259A_lock, flags); + raw_spin_lock_irqsave(&i8259A_lock, flags); cached_irq_mask &= mask; if (irq & 8) outb(cached_slave_mask, PIC_SLAVE_IMR); else outb(cached_master_mask, PIC_MASTER_IMR); - spin_unlock_irqrestore(&i8259A_lock, flags); + raw_spin_unlock_irqrestore(&i8259A_lock, flags); } int i8259A_irq_pending(unsigned int irq) @@ -98,12 +98,12 @@ int i8259A_irq_pending(unsigned int irq) irq -= I8259A_IRQ_BASE; mask = 1 << irq; - spin_lock_irqsave(&i8259A_lock, flags); + raw_spin_lock_irqsave(&i8259A_lock, flags); if (irq < 8) ret = inb(PIC_MASTER_CMD) & mask; else ret = inb(PIC_SLAVE_CMD) & (mask >> 8); - spin_unlock_irqrestore(&i8259A_lock, flags); + raw_spin_unlock_irqrestore(&i8259A_lock, flags); return ret; } @@ -151,7 +151,7 @@ static void mask_and_ack_8259A(unsigned int irq) irq -= I8259A_IRQ_BASE; irqmask = 1 << irq; - spin_lock_irqsave(&i8259A_lock, flags); + raw_spin_lock_irqsave(&i8259A_lock, flags); /* * Lightweight spurious IRQ detection. We do not want * to overdo spurious IRQ handling - it's usually a sign @@ -183,7 +183,7 @@ handle_real_irq: outb(0x60+irq, PIC_MASTER_CMD); /* 'Specific EOI to master */ } smtc_im_ack_irq(irq); - spin_unlock_irqrestore(&i8259A_lock, flags); + raw_spin_unlock_irqrestore(&i8259A_lock, flags); return; spurious_8259A_irq: @@ -264,7 +264,7 @@ static void init_8259A(int auto_eoi) i8259A_auto_eoi = auto_eoi; - spin_lock_irqsave(&i8259A_lock, flags); + raw_spin_lock_irqsave(&i8259A_lock, flags); outb(0xff, PIC_MASTER_IMR); /* mask all of 8259A-1 */ outb(0xff, PIC_SLAVE_IMR); /* mask all of 8259A-2 */ @@ -298,7 +298,7 @@ static void init_8259A(int auto_eoi) outb(cached_master_mask, PIC_MASTER_IMR); /* restore master IRQ mask */ outb(cached_slave_mask, PIC_SLAVE_IMR); /* restore slave IRQ mask */ - spin_unlock_irqrestore(&i8259A_lock, flags); + raw_spin_unlock_irqrestore(&i8259A_lock, flags); } /* diff --git a/arch/mips/kernel/irq-gt641xx.c b/arch/mips/kernel/irq-gt641xx.c index ebcc5f7ad9c..42ef81461bf 100644 --- a/arch/mips/kernel/irq-gt641xx.c +++ b/arch/mips/kernel/irq-gt641xx.c @@ -27,18 +27,18 @@ #define GT641XX_IRQ_TO_BIT(irq) (1U << (irq - GT641XX_IRQ_BASE)) -static DEFINE_SPINLOCK(gt641xx_irq_lock); +static DEFINE_RAW_SPINLOCK(gt641xx_irq_lock); static void ack_gt641xx_irq(unsigned int irq) { unsigned long flags; u32 cause; - spin_lock_irqsave(>641xx_irq_lock, flags); + raw_spin_lock_irqsave(>641xx_irq_lock, flags); cause = GT_READ(GT_INTRCAUSE_OFS); cause &= ~GT641XX_IRQ_TO_BIT(irq); GT_WRITE(GT_INTRCAUSE_OFS, cause); - spin_unlock_irqrestore(>641xx_irq_lock, flags); + raw_spin_unlock_irqrestore(>641xx_irq_lock, flags); } static void mask_gt641xx_irq(unsigned int irq) @@ -46,11 +46,11 @@ static void mask_gt641xx_irq(unsigned int irq) unsigned long flags; u32 mask; - spin_lock_irqsave(>641xx_irq_lock, flags); + raw_spin_lock_irqsave(>641xx_irq_lock, flags); mask = GT_READ(GT_INTRMASK_OFS); mask &= ~GT641XX_IRQ_TO_BIT(irq); GT_WRITE(GT_INTRMASK_OFS, mask); - spin_unlock_irqrestore(>641xx_irq_lock, flags); + raw_spin_unlock_irqrestore(>641xx_irq_lock, flags); } static void mask_ack_gt641xx_irq(unsigned int irq) @@ -58,7 +58,7 @@ static void mask_ack_gt641xx_irq(unsigned int irq) unsigned long flags; u32 cause, mask; - spin_lock_irqsave(>641xx_irq_lock, flags); + raw_spin_lock_irqsave(>641xx_irq_lock, flags); mask = GT_READ(GT_INTRMASK_OFS); mask &= ~GT641XX_IRQ_TO_BIT(irq); GT_WRITE(GT_INTRMASK_OFS, mask); @@ -66,7 +66,7 @@ static void mask_ack_gt641xx_irq(unsigned int irq) cause = GT_READ(GT_INTRCAUSE_OFS); cause &= ~GT641XX_IRQ_TO_BIT(irq); GT_WRITE(GT_INTRCAUSE_OFS, cause); - spin_unlock_irqrestore(>641xx_irq_lock, flags); + raw_spin_unlock_irqrestore(>641xx_irq_lock, flags); } static void unmask_gt641xx_irq(unsigned int irq) @@ -74,11 +74,11 @@ static void unmask_gt641xx_irq(unsigned int irq) unsigned long flags; u32 mask; - spin_lock_irqsave(>641xx_irq_lock, flags); + raw_spin_lock_irqsave(>641xx_irq_lock, flags); mask = GT_READ(GT_INTRMASK_OFS); mask |= GT641XX_IRQ_TO_BIT(irq); GT_WRITE(GT_INTRMASK_OFS, mask); - spin_unlock_irqrestore(>641xx_irq_lock, flags); + raw_spin_unlock_irqrestore(>641xx_irq_lock, flags); } static struct irq_chip gt641xx_irq_chip = { diff --git a/arch/mips/kernel/linux32.c b/arch/mips/kernel/linux32.c index f042563c924..bde79ef602e 100644 --- a/arch/mips/kernel/linux32.c +++ b/arch/mips/kernel/linux32.c @@ -9,7 +9,6 @@ #include <linux/mm.h> #include <linux/errno.h> #include <linux/file.h> -#include <linux/smp_lock.h> #include <linux/highuid.h> #include <linux/resource.h> #include <linux/highmem.h> diff --git a/arch/mips/kernel/mcount.S b/arch/mips/kernel/mcount.S index 0a9cfdb271d..6851fc97a51 100644 --- a/arch/mips/kernel/mcount.S +++ b/arch/mips/kernel/mcount.S @@ -6,7 +6,7 @@ * more details. * * Copyright (C) 2009 Lemote Inc. & DSLab, Lanzhou University, China - * Author: Wu Zhangjin <wuzj@lemote.com> + * Author: Wu Zhangjin <wuzhangjin@gmail.com> */ #include <asm/regdef.h> diff --git a/arch/mips/kernel/octeon_switch.S b/arch/mips/kernel/octeon_switch.S index 3952b8323ef..dd18b26a358 100644 --- a/arch/mips/kernel/octeon_switch.S +++ b/arch/mips/kernel/octeon_switch.S @@ -500,4 +500,3 @@ done_restore: nop END(octeon_mult_restore) .set pop - diff --git a/arch/mips/kernel/rtlx.c b/arch/mips/kernel/rtlx.c index 364f066cb49..dcaed1bbbfe 100644 --- a/arch/mips/kernel/rtlx.c +++ b/arch/mips/kernel/rtlx.c @@ -28,7 +28,6 @@ #include <linux/vmalloc.h> #include <linux/elf.h> #include <linux/seq_file.h> -#include <linux/smp_lock.h> #include <linux/syscalls.h> #include <linux/moduleloader.h> #include <linux/interrupt.h> diff --git a/arch/mips/kernel/spinlock_test.c b/arch/mips/kernel/spinlock_test.c new file mode 100644 index 00000000000..da61134dfc5 --- /dev/null +++ b/arch/mips/kernel/spinlock_test.c @@ -0,0 +1,141 @@ +#include <linux/init.h> +#include <linux/kthread.h> +#include <linux/hrtimer.h> +#include <linux/fs.h> +#include <linux/debugfs.h> +#include <linux/module.h> +#include <linux/spinlock.h> + + +static int ss_get(void *data, u64 *val) +{ + ktime_t start, finish; + int loops; + int cont; + DEFINE_RAW_SPINLOCK(ss_spin); + + loops = 1000000; + cont = 1; + + start = ktime_get(); + + while (cont) { + raw_spin_lock(&ss_spin); + loops--; + if (loops == 0) + cont = 0; + raw_spin_unlock(&ss_spin); + } + + finish = ktime_get(); + + *val = ktime_us_delta(finish, start); + + return 0; +} + +DEFINE_SIMPLE_ATTRIBUTE(fops_ss, ss_get, NULL, "%llu\n"); + + + +struct spin_multi_state { + raw_spinlock_t lock; + atomic_t start_wait; + atomic_t enter_wait; + atomic_t exit_wait; + int loops; +}; + +struct spin_multi_per_thread { + struct spin_multi_state *state; + ktime_t start; +}; + +static int multi_other(void *data) +{ + int loops; + int cont; + struct spin_multi_per_thread *pt = data; + struct spin_multi_state *s = pt->state; + + loops = s->loops; + cont = 1; + + atomic_dec(&s->enter_wait); + + while (atomic_read(&s->enter_wait)) + ; /* spin */ + + pt->start = ktime_get(); + + atomic_dec(&s->start_wait); + + while (atomic_read(&s->start_wait)) + ; /* spin */ + + while (cont) { + raw_spin_lock(&s->lock); + loops--; + if (loops == 0) + cont = 0; + raw_spin_unlock(&s->lock); + } + + atomic_dec(&s->exit_wait); + while (atomic_read(&s->exit_wait)) + ; /* spin */ + return 0; +} + +static int multi_get(void *data, u64 *val) +{ + ktime_t finish; + struct spin_multi_state ms; + struct spin_multi_per_thread t1, t2; + + ms.lock = __RAW_SPIN_LOCK_UNLOCKED("multi_get"); + ms.loops = 1000000; + + atomic_set(&ms.start_wait, 2); + atomic_set(&ms.enter_wait, 2); + atomic_set(&ms.exit_wait, 2); + t1.state = &ms; + t2.state = &ms; + + kthread_run(multi_other, &t2, "multi_get"); + + multi_other(&t1); + + finish = ktime_get(); + + *val = ktime_us_delta(finish, t1.start); + + return 0; +} + +DEFINE_SIMPLE_ATTRIBUTE(fops_multi, multi_get, NULL, "%llu\n"); + + +extern struct dentry *mips_debugfs_dir; +static int __init spinlock_test(void) +{ + struct dentry *d; + + if (!mips_debugfs_dir) + return -ENODEV; + + d = debugfs_create_file("spin_single", S_IRUGO, + mips_debugfs_dir, NULL, + &fops_ss); + if (!d) + return -ENOMEM; + + d = debugfs_create_file("spin_multi", S_IRUGO, + mips_debugfs_dir, NULL, + &fops_multi); + if (!d) + return -ENOMEM; + + return 0; +} +device_initcall(spinlock_test); diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c index 31b204b26ba..4e00f9bc23e 100644 --- a/arch/mips/kernel/traps.c +++ b/arch/mips/kernel/traps.c @@ -50,6 +50,7 @@ #include <asm/types.h> #include <asm/stacktrace.h> #include <asm/irq.h> +#include <asm/uasm.h> extern void check_wait(void); extern asmlinkage void r4k_wait(void); @@ -1271,21 +1272,25 @@ unsigned long ebase; unsigned long exception_handlers[32]; unsigned long vi_handlers[64]; -/* - * As a side effect of the way this is implemented we're limited - * to interrupt handlers in the address range from - * KSEG0 <= x < KSEG0 + 256mb on the Nevada. Oh well ... - */ -void *set_except_vector(int n, void *addr) +void __init *set_except_vector(int n, void *addr) { unsigned long handler = (unsigned long) addr; unsigned long old_handler = exception_handlers[n]; exception_handlers[n] = handler; if (n == 0 && cpu_has_divec) { - *(u32 *)(ebase + 0x200) = 0x08000000 | - (0x03ffffff & (handler >> 2)); - local_flush_icache_range(ebase + 0x200, ebase + 0x204); + unsigned long jump_mask = ~((1 << 28) - 1); + u32 *buf = (u32 *)(ebase + 0x200); + unsigned int k0 = 26; + if ((handler & jump_mask) == ((ebase + 0x200) & jump_mask)) { + uasm_i_j(&buf, handler & ~jump_mask); + uasm_i_nop(&buf); + } else { + UASM_i_LA(&buf, k0, handler); + uasm_i_jr(&buf, k0); + uasm_i_nop(&buf); + } + local_flush_icache_range(ebase + 0x200, (unsigned long)buf); } return (void *)old_handler; } diff --git a/arch/mips/kernel/vpe.c b/arch/mips/kernel/vpe.c index 60477529362..2bd2151c586 100644 --- a/arch/mips/kernel/vpe.c +++ b/arch/mips/kernel/vpe.c @@ -38,7 +38,6 @@ #include <linux/vmalloc.h> #include <linux/elf.h> #include <linux/seq_file.h> -#include <linux/smp_lock.h> #include <linux/syscalls.h> #include <linux/moduleloader.h> #include <linux/interrupt.h> |