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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /arch/mn10300/include/asm/tlbflush.h
Initial import
Diffstat (limited to 'arch/mn10300/include/asm/tlbflush.h')
-rw-r--r--arch/mn10300/include/asm/tlbflush.h154
1 files changed, 154 insertions, 0 deletions
diff --git a/arch/mn10300/include/asm/tlbflush.h b/arch/mn10300/include/asm/tlbflush.h
new file mode 100644
index 000000000..efddd6e1a
--- /dev/null
+++ b/arch/mn10300/include/asm/tlbflush.h
@@ -0,0 +1,154 @@
+/* MN10300 TLB flushing functions
+ *
+ * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+#ifndef _ASM_TLBFLUSH_H
+#define _ASM_TLBFLUSH_H
+
+#include <linux/mm.h>
+#include <asm/processor.h>
+
+struct tlb_state {
+ struct mm_struct *active_mm;
+ int state;
+};
+DECLARE_PER_CPU_SHARED_ALIGNED(struct tlb_state, cpu_tlbstate);
+
+/**
+ * local_flush_tlb - Flush the current MM's entries from the local CPU's TLBs
+ */
+static inline void local_flush_tlb(void)
+{
+ int w;
+ asm volatile(
+ " mov %1,%0 \n"
+ " or %2,%0 \n"
+ " mov %0,%1 \n"
+ : "=d"(w)
+ : "m"(MMUCTR), "i"(MMUCTR_IIV|MMUCTR_DIV)
+ : "cc", "memory");
+}
+
+/**
+ * local_flush_tlb_all - Flush all entries from the local CPU's TLBs
+ */
+static inline void local_flush_tlb_all(void)
+{
+ local_flush_tlb();
+}
+
+/**
+ * local_flush_tlb_one - Flush one entry from the local CPU's TLBs
+ */
+static inline void local_flush_tlb_one(unsigned long addr)
+{
+ local_flush_tlb();
+}
+
+/**
+ * local_flush_tlb_page - Flush a page's entry from the local CPU's TLBs
+ * @mm: The MM to flush for
+ * @addr: The address of the target page in RAM (not its page struct)
+ */
+static inline
+void local_flush_tlb_page(struct mm_struct *mm, unsigned long addr)
+{
+ unsigned long pteu, flags, cnx;
+
+ addr &= PAGE_MASK;
+
+ local_irq_save(flags);
+
+ cnx = 1;
+#ifdef CONFIG_MN10300_TLB_USE_PIDR
+ cnx = mm->context.tlbpid[smp_processor_id()];
+#endif
+ if (cnx) {
+ pteu = addr;
+#ifdef CONFIG_MN10300_TLB_USE_PIDR
+ pteu |= cnx & xPTEU_PID;
+#endif
+ IPTEU = pteu;
+ DPTEU = pteu;
+ if (IPTEL & xPTEL_V)
+ IPTEL = 0;
+ if (DPTEL & xPTEL_V)
+ DPTEL = 0;
+ }
+ local_irq_restore(flags);
+}
+
+/*
+ * TLB flushing:
+ *
+ * - flush_tlb() flushes the current mm struct TLBs
+ * - flush_tlb_all() flushes all processes TLBs
+ * - flush_tlb_mm(mm) flushes the specified mm context TLB's
+ * - flush_tlb_page(vma, vmaddr) flushes one page
+ * - flush_tlb_range(mm, start, end) flushes a range of pages
+ * - flush_tlb_pgtables(mm, start, end) flushes a range of page tables
+ */
+#ifdef CONFIG_SMP
+
+#include <asm/smp.h>
+
+extern void flush_tlb_all(void);
+extern void flush_tlb_current_task(void);
+extern void flush_tlb_mm(struct mm_struct *);
+extern void flush_tlb_page(struct vm_area_struct *, unsigned long);
+
+#define flush_tlb() flush_tlb_current_task()
+
+static inline void flush_tlb_range(struct vm_area_struct *vma,
+ unsigned long start, unsigned long end)
+{
+ flush_tlb_mm(vma->vm_mm);
+}
+
+#else /* CONFIG_SMP */
+
+static inline void flush_tlb_all(void)
+{
+ preempt_disable();
+ local_flush_tlb_all();
+ preempt_enable();
+}
+
+static inline void flush_tlb_mm(struct mm_struct *mm)
+{
+ preempt_disable();
+ local_flush_tlb_all();
+ preempt_enable();
+}
+
+static inline void flush_tlb_range(struct vm_area_struct *vma,
+ unsigned long start, unsigned long end)
+{
+ preempt_disable();
+ local_flush_tlb_all();
+ preempt_enable();
+}
+
+#define flush_tlb_page(vma, addr) local_flush_tlb_page((vma)->vm_mm, addr)
+#define flush_tlb() flush_tlb_all()
+
+#endif /* CONFIG_SMP */
+
+static inline void flush_tlb_kernel_range(unsigned long start,
+ unsigned long end)
+{
+ flush_tlb_all();
+}
+
+static inline void flush_tlb_pgtables(struct mm_struct *mm,
+ unsigned long start, unsigned long end)
+{
+}
+
+#endif /* _ASM_TLBFLUSH_H */