diff options
Diffstat (limited to 'arch/metag')
-rw-r--r-- | arch/metag/include/asm/atomic_lnkget.h | 36 | ||||
-rw-r--r-- | arch/metag/include/asm/atomic_lock1.h | 33 | ||||
-rw-r--r-- | arch/metag/include/asm/spinlock.h | 14 | ||||
-rw-r--r-- | arch/metag/kernel/dma.c | 16 | ||||
-rw-r--r-- | arch/metag/kernel/perf/perf_event.c | 26 | ||||
-rw-r--r-- | arch/metag/kernel/setup.c | 5 | ||||
-rw-r--r-- | arch/metag/mm/fault.c | 2 |
7 files changed, 90 insertions, 42 deletions
diff --git a/arch/metag/include/asm/atomic_lnkget.h b/arch/metag/include/asm/atomic_lnkget.h index 88fa25fae8bd..def2c642f053 100644 --- a/arch/metag/include/asm/atomic_lnkget.h +++ b/arch/metag/include/asm/atomic_lnkget.h @@ -69,16 +69,44 @@ static inline int atomic_##op##_return(int i, atomic_t *v) \ return result; \ } -#define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_OP_RETURN(op) +#define ATOMIC_FETCH_OP(op) \ +static inline int atomic_fetch_##op(int i, atomic_t *v) \ +{ \ + int result, temp; \ + \ + smp_mb(); \ + \ + asm volatile ( \ + "1: LNKGETD %1, [%2]\n" \ + " " #op " %0, %1, %3\n" \ + " LNKSETD [%2], %0\n" \ + " DEFR %0, TXSTAT\n" \ + " ANDT %0, %0, #HI(0x3f000000)\n" \ + " CMPT %0, #HI(0x02000000)\n" \ + " BNZ 1b\n" \ + : "=&d" (temp), "=&d" (result) \ + : "da" (&v->counter), "bd" (i) \ + : "cc"); \ + \ + smp_mb(); \ + \ + return result; \ +} + +#define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_OP_RETURN(op) ATOMIC_FETCH_OP(op) ATOMIC_OPS(add) ATOMIC_OPS(sub) -ATOMIC_OP(and) -ATOMIC_OP(or) -ATOMIC_OP(xor) +#undef ATOMIC_OPS +#define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_FETCH_OP(op) + +ATOMIC_OPS(and) +ATOMIC_OPS(or) +ATOMIC_OPS(xor) #undef ATOMIC_OPS +#undef ATOMIC_FETCH_OP #undef ATOMIC_OP_RETURN #undef ATOMIC_OP diff --git a/arch/metag/include/asm/atomic_lock1.h b/arch/metag/include/asm/atomic_lock1.h index 0295d9b8d5bf..6c1380a8a0d4 100644 --- a/arch/metag/include/asm/atomic_lock1.h +++ b/arch/metag/include/asm/atomic_lock1.h @@ -64,15 +64,40 @@ static inline int atomic_##op##_return(int i, atomic_t *v) \ return result; \ } -#define ATOMIC_OPS(op, c_op) ATOMIC_OP(op, c_op) ATOMIC_OP_RETURN(op, c_op) +#define ATOMIC_FETCH_OP(op, c_op) \ +static inline int atomic_fetch_##op(int i, atomic_t *v) \ +{ \ + unsigned long result; \ + unsigned long flags; \ + \ + __global_lock1(flags); \ + result = v->counter; \ + fence(); \ + v->counter c_op i; \ + __global_unlock1(flags); \ + \ + return result; \ +} + +#define ATOMIC_OPS(op, c_op) \ + ATOMIC_OP(op, c_op) \ + ATOMIC_OP_RETURN(op, c_op) \ + ATOMIC_FETCH_OP(op, c_op) ATOMIC_OPS(add, +=) ATOMIC_OPS(sub, -=) -ATOMIC_OP(and, &=) -ATOMIC_OP(or, |=) -ATOMIC_OP(xor, ^=) #undef ATOMIC_OPS +#define ATOMIC_OPS(op, c_op) \ + ATOMIC_OP(op, c_op) \ + ATOMIC_FETCH_OP(op, c_op) + +ATOMIC_OPS(and, &=) +ATOMIC_OPS(or, |=) +ATOMIC_OPS(xor, ^=) + +#undef ATOMIC_OPS +#undef ATOMIC_FETCH_OP #undef ATOMIC_OP_RETURN #undef ATOMIC_OP diff --git a/arch/metag/include/asm/spinlock.h b/arch/metag/include/asm/spinlock.h index 86a7cf3d1386..c0c7a22be1ae 100644 --- a/arch/metag/include/asm/spinlock.h +++ b/arch/metag/include/asm/spinlock.h @@ -1,14 +1,24 @@ #ifndef __ASM_SPINLOCK_H #define __ASM_SPINLOCK_H +#include <asm/barrier.h> +#include <asm/processor.h> + #ifdef CONFIG_METAG_ATOMICITY_LOCK1 #include <asm/spinlock_lock1.h> #else #include <asm/spinlock_lnkget.h> #endif -#define arch_spin_unlock_wait(lock) \ - do { while (arch_spin_is_locked(lock)) cpu_relax(); } while (0) +/* + * both lock1 and lnkget are test-and-set spinlocks with 0 unlocked and 1 + * locked. + */ + +static inline void arch_spin_unlock_wait(arch_spinlock_t *lock) +{ + smp_cond_load_acquire(&lock->lock, !VAL); +} #define arch_spin_lock_flags(lock, flags) arch_spin_lock(lock) diff --git a/arch/metag/kernel/dma.c b/arch/metag/kernel/dma.c index e12368d02155..0db31e24c541 100644 --- a/arch/metag/kernel/dma.c +++ b/arch/metag/kernel/dma.c @@ -172,7 +172,7 @@ out: * virtual and bus address for that space. */ static void *metag_dma_alloc(struct device *dev, size_t size, - dma_addr_t *handle, gfp_t gfp, struct dma_attrs *attrs) + dma_addr_t *handle, gfp_t gfp, unsigned long attrs) { struct page *page; struct metag_vm_region *c; @@ -268,7 +268,7 @@ no_page: * free a page as defined by the above mapping. */ static void metag_dma_free(struct device *dev, size_t size, void *vaddr, - dma_addr_t dma_handle, struct dma_attrs *attrs) + dma_addr_t dma_handle, unsigned long attrs) { struct metag_vm_region *c; unsigned long flags, addr; @@ -331,13 +331,13 @@ no_area: static int metag_dma_mmap(struct device *dev, struct vm_area_struct *vma, void *cpu_addr, dma_addr_t dma_addr, size_t size, - struct dma_attrs *attrs) + unsigned long attrs) { unsigned long flags, user_size, kern_size; struct metag_vm_region *c; int ret = -ENXIO; - if (dma_get_attr(DMA_ATTR_WRITE_COMBINE, attrs)) + if (attrs & DMA_ATTR_WRITE_COMBINE) vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot); else vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); @@ -482,7 +482,7 @@ static void dma_sync_for_cpu(void *vaddr, size_t size, int dma_direction) static dma_addr_t metag_dma_map_page(struct device *dev, struct page *page, unsigned long offset, size_t size, - enum dma_data_direction direction, struct dma_attrs *attrs) + enum dma_data_direction direction, unsigned long attrs) { dma_sync_for_device((void *)(page_to_phys(page) + offset), size, direction); @@ -491,14 +491,14 @@ static dma_addr_t metag_dma_map_page(struct device *dev, struct page *page, static void metag_dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size, enum dma_data_direction direction, - struct dma_attrs *attrs) + unsigned long attrs) { dma_sync_for_cpu(phys_to_virt(dma_address), size, direction); } static int metag_dma_map_sg(struct device *dev, struct scatterlist *sglist, int nents, enum dma_data_direction direction, - struct dma_attrs *attrs) + unsigned long attrs) { struct scatterlist *sg; int i; @@ -516,7 +516,7 @@ static int metag_dma_map_sg(struct device *dev, struct scatterlist *sglist, static void metag_dma_unmap_sg(struct device *dev, struct scatterlist *sglist, int nhwentries, enum dma_data_direction direction, - struct dma_attrs *attrs) + unsigned long attrs) { struct scatterlist *sg; int i; diff --git a/arch/metag/kernel/perf/perf_event.c b/arch/metag/kernel/perf/perf_event.c index 33a365f924be..052cba23708c 100644 --- a/arch/metag/kernel/perf/perf_event.c +++ b/arch/metag/kernel/perf/perf_event.c @@ -806,25 +806,16 @@ static struct metag_pmu _metag_pmu = { }; /* PMU CPU hotplug notifier */ -static int metag_pmu_cpu_notify(struct notifier_block *b, unsigned long action, - void *hcpu) +static int metag_pmu_starting_cpu(unsigned int cpu) { - unsigned int cpu = (unsigned int)hcpu; struct cpu_hw_events *cpuc = &per_cpu(cpu_hw_events, cpu); - if ((action & ~CPU_TASKS_FROZEN) != CPU_STARTING) - return NOTIFY_DONE; - memset(cpuc, 0, sizeof(struct cpu_hw_events)); raw_spin_lock_init(&cpuc->pmu_lock); - return NOTIFY_OK; + return 0; } -static struct notifier_block metag_pmu_notifier = { - .notifier_call = metag_pmu_cpu_notify, -}; - /* PMU Initialisation */ static int __init init_hw_perf_events(void) { @@ -876,16 +867,13 @@ static int __init init_hw_perf_events(void) metag_out32(0, PERF_COUNT(0)); metag_out32(0, PERF_COUNT(1)); - for_each_possible_cpu(cpu) { - struct cpu_hw_events *cpuc = &per_cpu(cpu_hw_events, cpu); + cpuhp_setup_state(CPUHP_AP_PERF_METAG_STARTING, + "AP_PERF_METAG_STARTING", metag_pmu_starting_cpu, + NULL); - memset(cpuc, 0, sizeof(struct cpu_hw_events)); - raw_spin_lock_init(&cpuc->pmu_lock); - } - - register_cpu_notifier(&metag_pmu_notifier); ret = perf_pmu_register(&pmu, metag_pmu->name, PERF_TYPE_RAW); -out: + if (ret) + cpuhp_remove_state_nocalls(CPUHP_AP_PERF_METAG_STARTING); return ret; } early_initcall(init_hw_perf_events); diff --git a/arch/metag/kernel/setup.c b/arch/metag/kernel/setup.c index 31cf53d0eba2..1166f1fbfd63 100644 --- a/arch/metag/kernel/setup.c +++ b/arch/metag/kernel/setup.c @@ -20,7 +20,6 @@ #include <linux/memblock.h> #include <linux/mm.h> #include <linux/of_fdt.h> -#include <linux/of_platform.h> #include <linux/pfn.h> #include <linux/root_dev.h> #include <linux/sched.h> @@ -414,9 +413,7 @@ static int __init customize_machine(void) /* customizes platform devices, or adds new ones */ if (machine_desc->init_machine) machine_desc->init_machine(); - else - of_platform_populate(NULL, of_default_bus_match_table, NULL, - NULL); + return 0; } arch_initcall(customize_machine); diff --git a/arch/metag/mm/fault.c b/arch/metag/mm/fault.c index 73b3c50f517d..c765b3621b9b 100644 --- a/arch/metag/mm/fault.c +++ b/arch/metag/mm/fault.c @@ -133,7 +133,7 @@ good_area: * make sure we exit gracefully rather than endlessly redo * the fault. */ - fault = handle_mm_fault(mm, vma, address, flags); + fault = handle_mm_fault(vma, address, flags); if ((fault & VM_FAULT_RETRY) && fatal_signal_pending(current)) return 0; |