From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@ppc970.osdl.org>
Date: Sat, 16 Apr 2005 15:20:36 -0700
Subject: Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
---
 arch/sh/mm/tlb-sh3.c | 92 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 92 insertions(+)
 create mode 100644 arch/sh/mm/tlb-sh3.c

(limited to 'arch/sh/mm/tlb-sh3.c')

diff --git a/arch/sh/mm/tlb-sh3.c b/arch/sh/mm/tlb-sh3.c
new file mode 100644
index 000000000000..7a0d5c10bf20
--- /dev/null
+++ b/arch/sh/mm/tlb-sh3.c
@@ -0,0 +1,92 @@
+/*
+ * 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/smp_lock.h>
+#include <linux/interrupt.h>
+
+#include <asm/system.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/pgalloc.h>
+#include <asm/mmu_context.h>
+#include <asm/cacheflush.h>
+
+void update_mmu_cache(struct vm_area_struct * vma,
+		      unsigned long address, pte_t pte)
+{
+	unsigned long flags;
+	unsigned long pteval;
+	unsigned long vpn;
+
+	/* Ptrace may call this routine. */
+	if (vma && current->active_mm != vma->vm_mm)
+		return;
+
+#if defined(CONFIG_SH7705_CACHE_32KB)
+	struct page *page;
+	page = pte_page(pte);
+	if (VALID_PAGE(page) && !test_bit(PG_mapped, &page->flags)) {
+		unsigned long phys = pte_val(pte) & PTE_PHYS_MASK;
+		__flush_wback_region((void *)P1SEGADDR(phys), PAGE_SIZE);
+		__set_bit(PG_mapped, &page->flags);
+	}
+#endif
+
+	local_irq_save(flags);
+
+	/* Set PTEH register */
+	vpn = (address & MMU_VPN_MASK) | get_asid();
+	ctrl_outl(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 */
+	ctrl_outl(pteval, MMU_PTEL);
+
+	/* Load the TLB */
+	asm volatile("ldtlb": /* no output */ : /* no input */ : "memory");
+	local_irq_restore(flags);
+}
+
+void __flush_tlb_page(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 ((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++)
+		ctrl_outl(data, addr + (i << 8));
+}
+
-- 
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