[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/arch/sh/mm/tlb-pteaex.c b/src/kernel/linux/v4.14/arch/sh/mm/tlb-pteaex.c
new file mode 100644
index 0000000..4db21ad
--- /dev/null
+++ b/src/kernel/linux/v4.14/arch/sh/mm/tlb-pteaex.c
@@ -0,0 +1,106 @@
+/*
+ * arch/sh/mm/tlb-pteaex.c
+ *
+ * TLB operations for SH-X3 CPUs featuring PTE ASID Extensions.
+ *
+ * Copyright (C) 2009 Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/io.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;
+ __raw_writel(vpn, MMU_PTEH);
+
+ /* Set PTEAEX */
+ __raw_writel(get_asid(), MMU_PTEAEX);
+
+ pteval = pte.pte_low;
+
+ /* Set PTEA register */
+#ifdef CONFIG_X2TLB
+ /*
+ * For the extended mode TLB this is trivial, only the ESZ and
+ * EPR bits need to be written out to PTEA, with the remainder of
+ * the protection bits (with the exception of the compat-mode SZ
+ * and PR bits, which are cleared) being written out in PTEL.
+ */
+ __raw_writel(pte.pte_high, MMU_PTEA);
+#endif
+
+ /* Set PTEL register */
+ pteval &= _PAGE_FLAGS_HARDWARE_MASK; /* drop software flags */
+#ifdef CONFIG_CACHE_WRITETHROUGH
+ pteval |= _PAGE_WT;
+#endif
+ /* 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);
+}
+
+/*
+ * While SH-X2 extended TLB mode splits out the memory-mapped I/UTLB
+ * data arrays, SH-X3 cores with PTEAEX split out the memory-mapped
+ * address arrays. In compat mode the second array is inaccessible, while
+ * in extended mode, the legacy 8-bit ASID field in address array 1 has
+ * undefined behaviour.
+ */
+void local_flush_tlb_one(unsigned long asid, unsigned long page)
+{
+ jump_to_uncached();
+ __raw_writel(page, MMU_UTLB_ADDRESS_ARRAY | MMU_PAGE_ASSOC_BIT);
+ __raw_writel(asid, MMU_UTLB_ADDRESS_ARRAY2 | MMU_PAGE_ASSOC_BIT);
+ __raw_writel(page, MMU_ITLB_ADDRESS_ARRAY | MMU_PAGE_ASSOC_BIT);
+ __raw_writel(asid, MMU_ITLB_ADDRESS_ARRAY2 | MMU_PAGE_ASSOC_BIT);
+ back_to_cached();
+}
+
+void local_flush_tlb_all(void)
+{
+ unsigned long flags, status;
+ int i;
+
+ /*
+ * Flush all the TLB.
+ */
+ local_irq_save(flags);
+ jump_to_uncached();
+
+ status = __raw_readl(MMUCR);
+ status = ((status & MMUCR_URB) >> MMUCR_URB_SHIFT);
+
+ if (status == 0)
+ status = MMUCR_URB_NENTRIES;
+
+ for (i = 0; i < status; i++)
+ __raw_writel(0x0, MMU_UTLB_ADDRESS_ARRAY | (i << 8));
+
+ for (i = 0; i < 4; i++)
+ __raw_writel(0x0, MMU_ITLB_ADDRESS_ARRAY | (i << 8));
+
+ back_to_cached();
+ ctrl_barrier();
+ local_irq_restore(flags);
+}