[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/arch/sh/mm/tlb-sh3.c b/src/kernel/linux/v4.14/arch/sh/mm/tlb-sh3.c
new file mode 100644
index 0000000..5c66665
--- /dev/null
+++ b/src/kernel/linux/v4.14/arch/sh/mm/tlb-sh3.c
@@ -0,0 +1,97 @@
+/*
+ * arch/sh/mm/tlb-sh3.c
+ *
+ * SH-3 specific TLB operations
+ *
+ * Copyright (C) 1999 Niibe Yutaka
+ * Copyright (C) 2002 Paul Mundt
+ *
+ * Released under the terms of the GNU GPL v2.0.
+ */
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/ptrace.h>
+#include <linux/mman.h>
+#include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/interrupt.h>
+
+#include <asm/io.h>
+#include <linux/uaccess.h>
+#include <asm/pgalloc.h>
+#include <asm/mmu_context.h>
+#include <asm/cacheflush.h>
+
+void __update_tlb(struct vm_area_struct *vma, unsigned long address, pte_t pte)
+{
+ unsigned long flags, pteval, vpn;
+
+ /*
+ * Handle debugger faulting in for debugee.
+ */
+ if (vma && current->active_mm != vma->vm_mm)
+ return;
+
+ local_irq_save(flags);
+
+ /* Set PTEH register */
+ vpn = (address & MMU_VPN_MASK) | get_asid();
+ __raw_writel(vpn, MMU_PTEH);
+
+ pteval = pte_val(pte);
+
+ /* Set PTEL register */
+ pteval &= _PAGE_FLAGS_HARDWARE_MASK; /* drop software flags */
+ /* conveniently, we want all the software flags to be 0 anyway */
+ __raw_writel(pteval, MMU_PTEL);
+
+ /* Load the TLB */
+ asm volatile("ldtlb": /* no output */ : /* no input */ : "memory");
+ local_irq_restore(flags);
+}
+
+void local_flush_tlb_one(unsigned long asid, unsigned long page)
+{
+ unsigned long addr, data;
+ int i, ways = MMU_NTLB_WAYS;
+
+ /*
+ * NOTE: PTEH.ASID should be set to this MM
+ * _AND_ we need to write ASID to the array.
+ *
+ * It would be simple if we didn't need to set PTEH.ASID...
+ */
+ addr = MMU_TLB_ADDRESS_ARRAY | (page & 0x1F000);
+ data = (page & 0xfffe0000) | asid; /* VALID bit is off */
+
+ if ((current_cpu_data.flags & CPU_HAS_MMU_PAGE_ASSOC)) {
+ addr |= MMU_PAGE_ASSOC_BIT;
+ ways = 1; /* we already know the way .. */
+ }
+
+ for (i = 0; i < ways; i++)
+ __raw_writel(data, addr + (i << 8));
+}
+
+void local_flush_tlb_all(void)
+{
+ unsigned long flags, status;
+
+ /*
+ * Flush all the TLB.
+ *
+ * Write to the MMU control register's bit:
+ * TF-bit for SH-3, TI-bit for SH-4.
+ * It's same position, bit #2.
+ */
+ local_irq_save(flags);
+ status = __raw_readl(MMUCR);
+ status |= 0x04;
+ __raw_writel(status, MMUCR);
+ ctrl_barrier();
+ local_irq_restore(flags);
+}