patch-2.3.48 linux/arch/mips64/kernel/r4k_tlb_debug.c

• Lines: 73
• Date: Thu Feb 24 22:53:35 2000
• Orig file: v2.3.47/linux/arch/mips64/kernel/r4k_tlb_debug.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.47/linux/arch/mips64/kernel/r4k_tlb_debug.c linux/arch/mips64/kernel/r4k_tlb_debug.c
@@ -0,0 +1,72 @@
+/* $Id: r4k_tlb_debug.c,v 1.3 2000/01/29 01:41:59 ralf Exp $
+ *
+ * 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.
+ *
+ * Copyright (C) 1999 Ralf Baechle
+ * Copyright (C) 1999 Silicon Graphics, Inc.
+ *
+ * TLB debugging routines.  These perform horribly slow but can easily be
+ * modified for debugging purposes.
+ */
+#include <linux/linkage.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/ptrace.h>
+#include <asm/system.h>
+
+asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long write,
+                              unsigned long address);
+
+asmlinkage void tlb_refill_debug(struct pt_regs regs)
+{
+	show_regs(&regs);
+	panic(__FUNCTION__ " called.  This Does Not Happen (TM).");
+}
+
+asmlinkage void xtlb_refill_debug(struct pt_regs *regs)
+{
+	unsigned long addr;
+	pgd_t *pgd;
+	pmd_t *pmd;
+	pte_t *pte;
+
+	addr = regs->cp0_badvaddr & ~((PAGE_SIZE << 1) - 1);
+	pgd = pgd_offset(current->active_mm, addr);
+	pmd = pmd_offset(pgd, addr);
+	pte = pte_offset(pmd, addr);
+
+	set_entrylo0(pte_val(pte[0]) >> 6);
+	set_entrylo1(pte_val(pte[1]) >> 6);
+	__asm__ __volatile__("nop;nop;nop");
+
+	tlb_write_random();
+}
+
+asmlinkage void xtlb_mod_debug(struct pt_regs *regs)
+{
+	unsigned long addr;
+
+	addr = regs->cp0_badvaddr;
+	do_page_fault(regs, 1, addr);
+}
+
+asmlinkage void xtlb_tlbl_debug(struct pt_regs *regs)
+{
+	unsigned long addr;
+
+	addr = regs->cp0_badvaddr;
+	do_page_fault(regs, 0, addr);
+}
+
+asmlinkage void xtlb_tlbs_debug(struct pt_regs *regs)
+{
+	unsigned long addr;
+
+	addr = regs->cp0_badvaddr;
+	do_page_fault(regs, 1, addr);
+}