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Diffstat (limited to 'arch/mips/lib/r3k_dump_tlb.c')
-rw-r--r--arch/mips/lib/r3k_dump_tlb.c62
1 files changed, 62 insertions, 0 deletions
diff --git a/arch/mips/lib/r3k_dump_tlb.c b/arch/mips/lib/r3k_dump_tlb.c
new file mode 100644
index 00000000000..52f87795ecc
--- /dev/null
+++ b/arch/mips/lib/r3k_dump_tlb.c
@@ -0,0 +1,62 @@
+/*
+ * Dump R3000 TLB for debugging purposes.
+ *
+ * Copyright (C) 1994, 1995 by Waldorf Electronics, written by Ralf Baechle.
+ * Copyright (C) 1999 by Silicon Graphics, Inc.
+ * Copyright (C) 1999 by Harald Koerfgen
+ */
+#include <linux/kernel.h>
+#include <linux/mm.h>
+
+#include <asm/mipsregs.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+
+extern int r3k_have_wired_reg; /* defined in tlb-r3k.c */
+
+static void dump_tlb(int first, int last)
+{
+ int i;
+ unsigned int asid;
+ unsigned long entryhi, entrylo0;
+
+ asid = read_c0_entryhi() & 0xfc0;
+
+ for (i = first; i <= last; i++) {
+ write_c0_index(i<<8);
+ __asm__ __volatile__(
+ ".set\tnoreorder\n\t"
+ "tlbr\n\t"
+ "nop\n\t"
+ ".set\treorder");
+ entryhi = read_c0_entryhi();
+ entrylo0 = read_c0_entrylo0();
+
+ /* Unused entries have a virtual address of KSEG0. */
+ if ((entryhi & 0xffffe000) != 0x80000000
+ && (entryhi & 0xfc0) == asid) {
+ /*
+ * Only print entries in use
+ */
+ printk("Index: %2d ", i);
+
+ printk("va=%08lx asid=%08lx"
+ " [pa=%06lx n=%d d=%d v=%d g=%d]",
+ (entryhi & 0xffffe000),
+ entryhi & 0xfc0,
+ entrylo0 & PAGE_MASK,
+ (entrylo0 & (1 << 11)) ? 1 : 0,
+ (entrylo0 & (1 << 10)) ? 1 : 0,
+ (entrylo0 & (1 << 9)) ? 1 : 0,
+ (entrylo0 & (1 << 8)) ? 1 : 0);
+ }
+ }
+ printk("\n");
+
+ write_c0_entryhi(asid);
+}
+
+void dump_tlb_all(void)
+{
+ dump_tlb(0, current_cpu_data.tlbsize - 1);
+}