Linux-2.6.12-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!
diff --git a/arch/mips/lib-64/dump_tlb.c b/arch/mips/lib-64/dump_tlb.c
new file mode 100644
index 0000000..42f88e0
--- /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++;
+ }
+}