Linux-2.6.12-rc2v2.6.12-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!

1 files changed, 211 insertions, 0 deletions

diff --git a/arch/mips/lib-64/dump_tlb.c b/arch/mips/lib-64/dump_tlb.c
new file mode 100644
index 000000000000..42f88e055b4c
--- /dev/null
+++ b/arch/mips/lib-64/dump_tlb.c
@@ -0,0 +1,211 @@
+/*
+ * Dump R4x00 TLB for debugging purposes.
+ *
+ * Copyright (C) 1994, 1995 by Waldorf Electronics, written by Ralf Baechle.
+ * Copyright (C) 1999 by Silicon Graphics, Inc.
+ */
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/sched.h>
+#include <linux/string.h>
+
+#include <asm/bootinfo.h>
+#include <asm/cachectl.h>
+#include <asm/cpu.h>
+#include <asm/mipsregs.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+
+static inline const char *msk2str(unsigned int mask)
+{
+	switch (mask) {
+	case PM_4K:	return "4kb";
+	case PM_16K:	return "16kb";
+	case PM_64K:	return "64kb";
+	case PM_256K:	return "256kb";
+#ifndef CONFIG_CPU_VR41XX
+	case PM_1M:	return "1Mb";
+	case PM_4M:	return "4Mb";
+	case PM_16M:	return "16Mb";
+	case PM_64M:	return "64Mb";
+	case PM_256M:	return "256Mb";
+#endif
+	}
+
+	return "unknown";
+}
+
+#define BARRIER()					\
+	__asm__ __volatile__(				\
+		".set\tnoreorder\n\t"			\
+		"nop;nop;nop;nop;nop;nop;nop\n\t"	\
+		".set\treorder");
+
+void dump_tlb(int first, int last)
+{
+	unsigned long s_entryhi, entryhi, entrylo0, entrylo1, asid;
+	unsigned int s_index, pagemask, c0, c1, i;
+
+	s_entryhi = read_c0_entryhi();
+	s_index = read_c0_index();
+	asid = s_entryhi & 0xff;
+
+	for (i = first; i <= last; i++) {
+		write_c0_index(i);
+		BARRIER();
+		tlb_read();
+		BARRIER();
+		pagemask = read_c0_pagemask();
+		entryhi  = read_c0_entryhi();
+		entrylo0 = read_c0_entrylo0();
+		entrylo1 = read_c0_entrylo1();
+
+		/* Unused entries have a virtual address of CKSEG0.  */
+		if ((entryhi & ~0x1ffffUL) != CKSEG0
+		    && (entryhi & 0xff) == asid) {
+			/*
+			 * Only print entries in use
+			 */
+			printk("Index: %2d pgmask=%s ", i, msk2str(pagemask));
+
+			c0 = (entrylo0 >> 3) & 7;
+			c1 = (entrylo1 >> 3) & 7;
+
+			printk("va=%011lx asid=%02lx\n",
+			       (entryhi & ~0x1fffUL),
+			       entryhi & 0xff);
+			printk("\t[pa=%011lx c=%d d=%d v=%d g=%ld] ",
+			       (entrylo0 << 6) & PAGE_MASK, c0,
+			       (entrylo0 & 4) ? 1 : 0,
+			       (entrylo0 & 2) ? 1 : 0,
+			       (entrylo0 & 1));
+			printk("[pa=%011lx c=%d d=%d v=%d g=%ld]\n",
+			       (entrylo1 << 6) & PAGE_MASK, c1,
+			       (entrylo1 & 4) ? 1 : 0,
+			       (entrylo1 & 2) ? 1 : 0,
+			       (entrylo1 & 1));
+		}
+	}
+	printk("\n");
+
+	write_c0_entryhi(s_entryhi);
+	write_c0_index(s_index);
+}
+
+void dump_tlb_all(void)
+{
+	dump_tlb(0, current_cpu_data.tlbsize - 1);
+}
+
+void dump_tlb_wired(void)
+{
+	int	wired;
+
+	wired = read_c0_wired();
+	printk("Wired: %d", wired);
+	dump_tlb(0, read_c0_wired());
+}
+
+void dump_tlb_addr(unsigned long addr)
+{
+	unsigned int flags, oldpid;
+	int index;
+
+	local_irq_save(flags);
+	oldpid = read_c0_entryhi() & 0xff;
+	BARRIER();
+	write_c0_entryhi((addr & PAGE_MASK) | oldpid);
+	BARRIER();
+	tlb_probe();
+	BARRIER();
+	index = read_c0_index();
+	write_c0_entryhi(oldpid);
+	local_irq_restore(flags);
+
+	if (index < 0) {
+		printk("No entry for address 0x%08lx in TLB\n", addr);
+		return;
+	}
+
+	printk("Entry %d maps address 0x%08lx\n", index, addr);
+	dump_tlb(index, index);
+}
+
+void dump_tlb_nonwired(void)
+{
+	dump_tlb(read_c0_wired(), current_cpu_data.tlbsize - 1);
+}
+
+void dump_list_process(struct task_struct *t, void *address)
+{
+	pgd_t	*page_dir, *pgd;
+	pmd_t	*pmd;
+	pte_t	*pte, page;
+	unsigned long addr, val;
+
+	addr = (unsigned long) address;
+
+	printk("Addr                 == %08lx\n", addr);
+	printk("tasks->mm.pgd        == %08lx\n", (unsigned long) t->mm->pgd);
+
+	page_dir = pgd_offset(t->mm, 0);
+	printk("page_dir == %016lx\n", (unsigned long) page_dir);
+
+	pgd = pgd_offset(t->mm, addr);
+	printk("pgd == %016lx\n", (unsigned long) pgd);
+
+	pmd = pmd_offset(pgd, addr);
+	printk("pmd == %016lx\n", (unsigned long) pmd);
+
+	pte = pte_offset(pmd, addr);
+	printk("pte == %016lx\n", (unsigned long) pte);
+
+	page = *pte;
+	printk("page == %08lx\n", pte_val(page));
+
+	val = pte_val(page);
+	if (val & _PAGE_PRESENT) printk("present ");
+	if (val & _PAGE_READ) printk("read ");
+	if (val & _PAGE_WRITE) printk("write ");
+	if (val & _PAGE_ACCESSED) printk("accessed ");
+	if (val & _PAGE_MODIFIED) printk("modified ");
+	if (val & _PAGE_R4KBUG) printk("r4kbug ");
+	if (val & _PAGE_GLOBAL) printk("global ");
+	if (val & _PAGE_VALID) printk("valid ");
+	printk("\n");
+}
+
+void dump_list_current(void *address)
+{
+	dump_list_process(current, address);
+}
+
+unsigned int vtop(void *address)
+{
+	pgd_t	*pgd;
+	pmd_t	*pmd;
+	pte_t	*pte;
+	unsigned int addr, paddr;
+
+	addr = (unsigned long) address;
+	pgd = pgd_offset(current->mm, addr);
+	pmd = pmd_offset(pgd, addr);
+	pte = pte_offset(pmd, addr);
+	paddr = (CKSEG1 | (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, *p);
+		p++;
+		printk("*%08lx == %08lx\n", (unsigned long)p, *p);
+		p++;
+	}
+}