Merge tag 'v2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

[mv-sheeva.git] / arch / arm / kernel / smp_tlb.c

diff --git a/arch/arm/kernel/smp_tlb.c b/arch/arm/kernel/smp_tlb.c
new file mode 100644 (file)
index 0000000..7dcb352
--- /dev/null
+++ b/arch/arm/kernel/smp_tlb.c
@@ -0,0 +1,139 @@
+/*
+ *  linux/arch/arm/kernel/smp_tlb.c
+ *
+ *  Copyright (C) 2002 ARM Limited, All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/preempt.h>
+#include <linux/smp.h>
+
+#include <asm/smp_plat.h>
+#include <asm/tlbflush.h>
+
+static void on_each_cpu_mask(void (*func)(void *), void *info, int wait,
+       const struct cpumask *mask)
+{
+       preempt_disable();
+
+       smp_call_function_many(mask, func, info, wait);
+       if (cpumask_test_cpu(smp_processor_id(), mask))
+               func(info);
+
+       preempt_enable();
+}
+
+/**********************************************************************/
+
+/*
+ * TLB operations
+ */
+struct tlb_args {
+       struct vm_area_struct *ta_vma;
+       unsigned long ta_start;
+       unsigned long ta_end;
+};
+
+static inline void ipi_flush_tlb_all(void *ignored)
+{
+       local_flush_tlb_all();
+}
+
+static inline void ipi_flush_tlb_mm(void *arg)
+{
+       struct mm_struct *mm = (struct mm_struct *)arg;
+
+       local_flush_tlb_mm(mm);
+}
+
+static inline void ipi_flush_tlb_page(void *arg)
+{
+       struct tlb_args *ta = (struct tlb_args *)arg;
+
+       local_flush_tlb_page(ta->ta_vma, ta->ta_start);
+}
+
+static inline void ipi_flush_tlb_kernel_page(void *arg)
+{
+       struct tlb_args *ta = (struct tlb_args *)arg;
+
+       local_flush_tlb_kernel_page(ta->ta_start);
+}
+
+static inline void ipi_flush_tlb_range(void *arg)
+{
+       struct tlb_args *ta = (struct tlb_args *)arg;
+
+       local_flush_tlb_range(ta->ta_vma, ta->ta_start, ta->ta_end);
+}
+
+static inline void ipi_flush_tlb_kernel_range(void *arg)
+{
+       struct tlb_args *ta = (struct tlb_args *)arg;
+
+       local_flush_tlb_kernel_range(ta->ta_start, ta->ta_end);
+}
+
+void flush_tlb_all(void)
+{
+       if (tlb_ops_need_broadcast())
+               on_each_cpu(ipi_flush_tlb_all, NULL, 1);
+       else
+               local_flush_tlb_all();
+}
+
+void flush_tlb_mm(struct mm_struct *mm)
+{
+       if (tlb_ops_need_broadcast())
+               on_each_cpu_mask(ipi_flush_tlb_mm, mm, 1, mm_cpumask(mm));
+       else
+               local_flush_tlb_mm(mm);
+}
+
+void flush_tlb_page(struct vm_area_struct *vma, unsigned long uaddr)
+{
+       if (tlb_ops_need_broadcast()) {
+               struct tlb_args ta;
+               ta.ta_vma = vma;
+               ta.ta_start = uaddr;
+               on_each_cpu_mask(ipi_flush_tlb_page, &ta, 1, mm_cpumask(vma->vm_mm));
+       } else
+               local_flush_tlb_page(vma, uaddr);
+}
+
+void flush_tlb_kernel_page(unsigned long kaddr)
+{
+       if (tlb_ops_need_broadcast()) {
+               struct tlb_args ta;
+               ta.ta_start = kaddr;
+               on_each_cpu(ipi_flush_tlb_kernel_page, &ta, 1);
+       } else
+               local_flush_tlb_kernel_page(kaddr);
+}
+
+void flush_tlb_range(struct vm_area_struct *vma,
+                     unsigned long start, unsigned long end)
+{
+       if (tlb_ops_need_broadcast()) {
+               struct tlb_args ta;
+               ta.ta_vma = vma;
+               ta.ta_start = start;
+               ta.ta_end = end;
+               on_each_cpu_mask(ipi_flush_tlb_range, &ta, 1, mm_cpumask(vma->vm_mm));
+       } else
+               local_flush_tlb_range(vma, start, end);
+}
+
+void flush_tlb_kernel_range(unsigned long start, unsigned long end)
+{
+       if (tlb_ops_need_broadcast()) {
+               struct tlb_args ta;
+               ta.ta_start = start;
+               ta.ta_end = end;
+               on_each_cpu(ipi_flush_tlb_kernel_range, &ta, 1);
+       } else
+               local_flush_tlb_kernel_range(start, end);
+}
+