Import of Linux/MIPS 1.3.0

1 files changed, 161 insertions, 0 deletions

diff --git a/arch/mips/lib/dump_tlb.c b/arch/mips/lib/dump_tlb.c
new file mode 100644
index 000000000..f730b9fce
--- /dev/null
+++ b/arch/mips/lib/dump_tlb.c
@@ -0,0 +1,161 @@
+/*
+ * Dump R4x00 TLB for debugging purposes.
+ *
+ * Copyright (C) 1994, 1995 by Waldorf Electronics,
+ * written by Ralf Baechle.
+ */
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/string.h>
+
+#include <asm/bootinfo.h>
+#include <asm/cachectl.h>
+#include <asm/mipsregs.h>
+
+static void
+dump_tlb(int first, int last)
+{
+	int	i;
+	int	wired;
+	unsigned int pagemask;
+	unsigned long long entryhi, entrylo0, entrylo1;
+
+	wired = read_32bit_cp0_register(CP0_WIRED);
+	printk("Wired: %d", wired);
+	
+	for(i=first;i<last;i++)
+	{
+		write_32bit_cp0_register(CP0_INDEX, i);
+		__asm__ __volatile__(
+			".set\tmips3\n\t"
+			".set\tnoreorder\n\t"
+			"nop;nop;nop;nop\n\t"
+			"tlbr\n\t"
+			"nop;nop;nop;nop\n\t"
+			".set\treorder\n\t"
+			".set\tmips0\n\t");
+		pagemask = read_32bit_cp0_register(CP0_PAGEMASK);
+		entryhi  = read_64bit_cp0_register(CP0_ENTRYHI);
+		entrylo0 = read_64bit_cp0_register(CP0_ENTRYLO0);
+		entrylo1 = read_64bit_cp0_register(CP0_ENTRYLO1);
+
+		if((entrylo0|entrylo1) & 2)
+		{
+			/*
+			 * Only print entries in use
+			 */
+			printk("\nIndex: %2d  %08x", i, pagemask);
+
+			printk("  %08x %08x", (unsigned int)(entryhi >> 32),
+			                      (unsigned int) entryhi);
+			printk("  %08x %08x", (unsigned int)(entrylo0 >> 32),
+			                      (unsigned int) entrylo0);
+			printk("  %08x %08x", (unsigned int)(entrylo1 >> 32),
+			                      (unsigned int) entrylo1);
+		}
+	}
+	printk("\n");
+}
+
+void
+dump_tlb_all(void)
+{
+	dump_tlb(0, boot_info.tlb_entries - 1);
+}
+
+void
+dump_tlb_nonwired(void)
+{
+	dump_tlb(read_32bit_cp0_register(CP0_WIRED), boot_info.tlb_entries - 1);
+}
+
+#include <linux/kernel.h>
+#include <linux/mm.h>
+
+#include <asm/mipsconfig.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+
+void
+dump_list_process(struct task_struct *t, void *address)
+{
+	pgd_t	*page_dir, *pgd;
+	pmd_t	*pmd;
+	pte_t	*pte, page;
+	unsigned int addr;
+
+	addr = (unsigned int) address;
+	printk("Addr == %08x\n", addr);
+
+	printk("tasks->tss.pg_dir == %08x\n",
+	       (unsigned int) t->tss.pg_dir);
+
+	page_dir = pgd_offset(t, 0);
+	printk("page_dir == %08x\n", (unsigned int) page_dir);
+
+	pgd = pgd_offset(t, addr);
+	printk("pgd == %08x, ", (unsigned int) pgd);
+
+	pmd = pmd_offset(pgd, addr);
+	printk("pmd == %08x, ", (unsigned int) pmd);
+
+	pte = pte_offset(pmd, addr);
+	printk("pte == %08x, ", (unsigned int) pte);
+
+	page = *pte;
+	printk("page == %08x\n", (unsigned int) pte_val(page));
+
+}
+
+void
+dump_list_current(void *address)
+{
+	unsigned int addr, *pt;
+
+	dump_list_process(current, address);
+
+	addr = (unsigned int) address;
+	pt = (unsigned int *) TLB_ROOT + (addr >> 22);
+	printk("L1: *%08x == ", (unsigned int) pt);
+	printk("%08x, ", *pt);
+
+	pt = (unsigned int *) (TLBMAP + ((addr >> 10) & ~3));
+	printk("L2: *%08x == ", (unsigned int) pt);
+	printk("%08x\n", *pt);
+}
+
+#include <asm/segment.h>
+
+unsigned int
+vtop(void *address)
+{
+	pgd_t	*pgd;
+	pmd_t	*pmd;
+	pte_t	*pte;
+	unsigned int addr, paddr;
+
+	addr = (unsigned int) address;
+	pgd = pgd_offset(current, addr);
+	pmd = pmd_offset(pgd, addr);
+	pte = pte_offset(pmd, addr);
+	paddr = (KSEG1 | (unsigned int) pte_val(*pte)) & PAGE_MASK;
+	paddr |= (addr & ~PAGE_MASK);
+
+	return paddr;
+}
+
+void
+dump16(unsigned long *p)
+{
+	int i;
+
+	for(i=0;i<8;i++)
+	{
+		printk("*%08lx == %08lx, ",
+		       (unsigned long)p, (unsigned long)*p++);
+		printk("*%08lx == %08lx\n",
+		       (unsigned long)p, (unsigned long)*p++);
+	}
+}
+