Initial commit: OpenHarmony-v4.0-ReleaseOpenHarmony-v4.0-Release

1 files changed, 75 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 000000000..10b4bf7f7
--- /dev/null
+++ b/arch/mips/lib/r3k_dump_tlb.c
@@ -0,0 +1,75 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * 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/mmu_context.h>
+#include <asm/page.h>
+#include <asm/tlbdebug.h>
+
+extern int r3k_have_wired_reg;
+
+void dump_tlb_regs(void)
+{
+        pr_info("Index    : %0x\n", read_c0_index());
+        pr_info("EntryHi  : %0lx\n", read_c0_entryhi());
+        pr_info("EntryLo  : %0lx\n", read_c0_entrylo0());
+        if (r3k_have_wired_reg)
+                pr_info("Wired    : %0x\n", read_c0_wired());
+}
+
+static void dump_tlb(int first, int last)
+{
+        int     i;
+        unsigned int asid;
+        unsigned long entryhi, entrylo0, asid_mask;
+
+        asid_mask = cpu_asid_mask(&current_cpu_data);
+        asid = read_c0_entryhi() & asid_mask;
+
+        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 & PAGE_MASK) != KSEG0 &&
+                    (entrylo0 & R3K_ENTRYLO_G ||
+                     (entryhi & asid_mask) == asid)) {
+                        /*
+                         * Only print entries in use
+                         */
+                        printk("Index: %2d ", i);
+
+                        pr_cont("va=%08lx asid=%08lx"
+                                "  [pa=%06lx n=%d d=%d v=%d g=%d]",
+                                entryhi & PAGE_MASK,
+                                entryhi & asid_mask,
+                                entrylo0 & PAGE_MASK,
+                                (entrylo0 & R3K_ENTRYLO_N) ? 1 : 0,
+                                (entrylo0 & R3K_ENTRYLO_D) ? 1 : 0,
+                                (entrylo0 & R3K_ENTRYLO_V) ? 1 : 0,
+                                (entrylo0 & R3K_ENTRYLO_G) ? 1 : 0);
+                }
+        }
+        printk("\n");
+
+        write_c0_entryhi(asid);
+}
+
+void dump_tlb_all(void)
+{
+        dump_tlb(0, current_cpu_data.tlbsize - 1);
+}