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!

5 files changed, 677 insertions, 0 deletions

diff --git a/arch/mips/lib-64/Makefile b/arch/mips/lib-64/Makefile
new file mode 100644
index 0000000..fd6a2ba
--- /dev/null
+++ b/arch/mips/lib-64/Makefile
@@ -0,0 +1,25 @@
+#
+# Makefile for MIPS-specific library files..
+#
+
+lib-y	+= csum_partial.o memset.o watch.o 
+
+obj-$(CONFIG_CPU_MIPS32)	+= dump_tlb.o
+obj-$(CONFIG_CPU_MIPS64)	+= dump_tlb.o
+obj-$(CONFIG_CPU_NEVADA)	+= dump_tlb.o
+obj-$(CONFIG_CPU_R10000)	+= dump_tlb.o
+obj-$(CONFIG_CPU_R3000)		+= r3k_dump_tlb.o
+obj-$(CONFIG_CPU_R4300)		+= dump_tlb.o
+obj-$(CONFIG_CPU_R4X00)		+= dump_tlb.o
+obj-$(CONFIG_CPU_R5000)		+= dump_tlb.o
+obj-$(CONFIG_CPU_R5432)		+= dump_tlb.o
+obj-$(CONFIG_CPU_R6000)		+=
+obj-$(CONFIG_CPU_R8000)		+=
+obj-$(CONFIG_CPU_RM7000)	+= dump_tlb.o
+obj-$(CONFIG_CPU_RM9000)	+= dump_tlb.o
+obj-$(CONFIG_CPU_SB1)		+= dump_tlb.o
+obj-$(CONFIG_CPU_TX39XX)	+= r3k_dump_tlb.o
+obj-$(CONFIG_CPU_TX49XX)	+= dump_tlb.o
+obj-$(CONFIG_CPU_VR41XX)	+= dump_tlb.o
+
+EXTRA_AFLAGS := $(CFLAGS)
diff --git a/arch/mips/lib-64/csum_partial.S b/arch/mips/lib-64/csum_partial.S
new file mode 100644
index 0000000..25aba66
--- /dev/null
+++ b/arch/mips/lib-64/csum_partial.S
@@ -0,0 +1,242 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Quick'n'dirty IP checksum ...
+ *
+ * Copyright (C) 1998, 1999 Ralf Baechle
+ * Copyright (C) 1999 Silicon Graphics, Inc.
+ */
+#include <asm/asm.h>
+#include <asm/regdef.h>
+
+#define ADDC(sum,reg)						\
+	addu	sum, reg;					\
+	sltu	v1, sum, reg;					\
+	addu	sum, v1
+
+#define CSUM_BIGCHUNK(src, offset, sum, t0, t1, t2, t3)		\
+	lw	t0, (offset + 0x00)(src);			\
+	lw	t1, (offset + 0x04)(src);			\
+	lw	t2, (offset + 0x08)(src); 			\
+	lw	t3, (offset + 0x0c)(src); 			\
+	ADDC(sum, t0);						\
+	ADDC(sum, t1);						\
+	ADDC(sum, t2);						\
+	ADDC(sum, t3);						\
+	lw	t0, (offset + 0x10)(src);			\
+	lw	t1, (offset + 0x14)(src);			\
+	lw	t2, (offset + 0x18)(src);			\
+	lw	t3, (offset + 0x1c)(src);			\
+	ADDC(sum, t0);						\
+	ADDC(sum, t1);						\
+	ADDC(sum, t2);						\
+	ADDC(sum, t3);						\
+
+/*
+ * a0: source address
+ * a1: length of the area to checksum
+ * a2: partial checksum
+ */
+
+#define src a0
+#define sum v0
+
+	.text
+	.set	noreorder
+
+/* unknown src alignment and < 8 bytes to go  */
+small_csumcpy:
+	move	a1, ta2
+
+	andi	ta0, a1, 4
+	beqz	ta0, 1f
+	 andi	ta0, a1, 2
+
+	/* Still a full word to go  */
+	ulw	ta1, (src)
+	daddiu	src, 4
+	ADDC(sum, ta1)
+
+1:	move	ta1, zero
+	beqz	ta0, 1f
+	 andi	ta0, a1, 1
+
+	/* Still a halfword to go  */
+	ulhu	ta1, (src)
+	daddiu	src, 2
+
+1:	beqz	ta0, 1f
+	 sll	ta1, ta1, 16
+
+	lbu	ta2, (src)
+	 nop
+
+#ifdef __MIPSEB__
+	sll	ta2, ta2, 8
+#endif
+	or	ta1, ta2
+
+1:	ADDC(sum, ta1)
+
+	/* fold checksum */
+	sll	v1, sum, 16
+	addu	sum, v1
+	sltu	v1, sum, v1
+	srl	sum, sum, 16
+	addu	sum, v1
+
+	/* odd buffer alignment? */
+	beqz	t3, 1f
+	 nop
+	sll	v1, sum, 8
+	srl	sum, sum, 8
+	or	sum, v1
+	andi	sum, 0xffff
+1:
+	.set	reorder
+	/* Add the passed partial csum.  */
+	ADDC(sum, a2)
+	jr	ra
+	.set	noreorder
+
+/* ------------------------------------------------------------------------- */
+
+	.align	5
+LEAF(csum_partial)
+	move	sum, zero
+	move	t3, zero
+
+	sltiu	t8, a1, 0x8
+	bnez	t8, small_csumcpy		/* < 8 bytes to copy */
+	 move	ta2, a1
+
+	beqz	a1, out
+	 andi	t3, src, 0x1			/* odd buffer? */
+
+hword_align:
+	beqz	t3, word_align
+	 andi	t8, src, 0x2
+
+	lbu	ta0, (src)
+	dsubu	a1, a1, 0x1
+#ifdef __MIPSEL__
+	sll	ta0, ta0, 8
+#endif
+	ADDC(sum, ta0)
+	daddu	src, src, 0x1
+	andi	t8, src, 0x2
+
+word_align:
+	beqz	t8, dword_align
+	 sltiu	t8, a1, 56
+
+	lhu	ta0, (src)
+	dsubu	a1, a1, 0x2
+	ADDC(sum, ta0)
+	sltiu	t8, a1, 56
+	daddu	src, src, 0x2
+
+dword_align:
+	bnez	t8, do_end_words
+	 move	t8, a1
+
+	andi	t8, src, 0x4
+	beqz	t8, qword_align
+	 andi	t8, src, 0x8
+
+	lw	ta0, 0x00(src)
+	dsubu	a1, a1, 0x4
+	ADDC(sum, ta0)
+	daddu	src, src, 0x4
+	andi	t8, src, 0x8
+
+qword_align:
+	beqz	t8, oword_align
+	 andi	t8, src, 0x10
+
+	lw	ta0, 0x00(src)
+	lw	ta1, 0x04(src)
+	dsubu	a1, a1, 0x8
+	ADDC(sum, ta0)
+	ADDC(sum, ta1)
+	daddu	src, src, 0x8
+	andi	t8, src, 0x10
+
+oword_align:
+	beqz	t8, begin_movement
+	 dsrl	t8, a1, 0x7
+
+	lw	ta3, 0x08(src)
+	lw	t0, 0x0c(src)
+	lw	ta0, 0x00(src)
+	lw	ta1, 0x04(src)
+	ADDC(sum, ta3)
+	ADDC(sum, t0)
+	ADDC(sum, ta0)
+	ADDC(sum, ta1)
+	dsubu	a1, a1, 0x10
+	daddu	src, src, 0x10
+	dsrl	t8, a1, 0x7
+
+begin_movement:
+	beqz	t8, 1f
+	 andi	ta2, a1, 0x40
+
+move_128bytes:
+	CSUM_BIGCHUNK(src, 0x00, sum, ta0, ta1, ta3, t0)
+	CSUM_BIGCHUNK(src, 0x20, sum, ta0, ta1, ta3, t0)
+	CSUM_BIGCHUNK(src, 0x40, sum, ta0, ta1, ta3, t0)
+	CSUM_BIGCHUNK(src, 0x60, sum, ta0, ta1, ta3, t0)
+	dsubu	t8, t8, 0x01
+	bnez	t8, move_128bytes
+	 daddu	src, src, 0x80
+
+1:
+	beqz	ta2, 1f
+	 andi	ta2, a1, 0x20
+
+move_64bytes:
+	CSUM_BIGCHUNK(src, 0x00, sum, ta0, ta1, ta3, t0)
+	CSUM_BIGCHUNK(src, 0x20, sum, ta0, ta1, ta3, t0)
+	daddu	src, src, 0x40
+
+1:
+	beqz	ta2, do_end_words
+	 andi	t8, a1, 0x1c
+
+move_32bytes:
+	CSUM_BIGCHUNK(src, 0x00, sum, ta0, ta1, ta3, t0)
+	andi	t8, a1, 0x1c
+	daddu	src, src, 0x20
+
+do_end_words:
+	beqz	t8, maybe_end_cruft
+	 dsrl	t8, t8, 0x2
+
+end_words:
+	lw	ta0, (src)
+	dsubu	t8, t8, 0x1
+	ADDC(sum, ta0)
+	bnez	t8, end_words
+	 daddu	src, src, 0x4
+
+maybe_end_cruft:
+	andi	ta2, a1, 0x3
+
+small_memcpy:
+ j small_csumcpy; move a1, ta2		/* XXX ??? */
+	beqz	t2, out
+	 move	a1, ta2
+
+end_bytes:
+	lb	ta0, (src)
+	dsubu	a1, a1, 0x1
+	bnez	a2, end_bytes
+	 daddu	src, src, 0x1
+
+out:
+	jr	ra
+	 move	v0, sum
+	END(csum_partial)
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++;
+	}
+}
diff --git a/arch/mips/lib-64/memset.S b/arch/mips/lib-64/memset.S
new file mode 100644
index 0000000..242f197
--- /dev/null
+++ b/arch/mips/lib-64/memset.S
@@ -0,0 +1,142 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1998, 1999, 2000 by Ralf Baechle
+ * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
+ */
+#include <asm/asm.h>
+#include <asm/offset.h>
+#include <asm/regdef.h>
+
+#define EX(insn,reg,addr,handler)			\
+9:	insn	reg, addr;				\
+	.section __ex_table,"a"; 			\
+	PTR	9b, handler; 				\
+	.previous
+
+	.macro	f_fill64 dst, offset, val, fixup
+	EX(LONG_S, \val, (\offset +  0 * LONGSIZE)(\dst), \fixup)
+	EX(LONG_S, \val, (\offset +  1 * LONGSIZE)(\dst), \fixup)
+	EX(LONG_S, \val, (\offset +  2 * LONGSIZE)(\dst), \fixup)
+	EX(LONG_S, \val, (\offset +  3 * LONGSIZE)(\dst), \fixup)
+	EX(LONG_S, \val, (\offset +  4 * LONGSIZE)(\dst), \fixup)
+	EX(LONG_S, \val, (\offset +  5 * LONGSIZE)(\dst), \fixup)
+	EX(LONG_S, \val, (\offset +  6 * LONGSIZE)(\dst), \fixup)
+	EX(LONG_S, \val, (\offset +  7 * LONGSIZE)(\dst), \fixup)
+	.endm
+
+/*
+ * memset(void *s, int c, size_t n)
+ *
+ * a0: start of area to clear
+ * a1: char to fill with
+ * a2: size of area to clear
+ */
+	.set	noreorder
+	.align	5
+LEAF(memset)
+	beqz		a1, 1f
+	 move		v0, a0			/* result */
+
+	andi		a1, 0xff		/* spread fillword */
+	dsll		t1, a1, 8
+	or		a1, t1
+	dsll		t1, a1, 16
+	or		a1, t1
+	dsll		t1, a1, 32
+	or		a1, t1
+1:
+
+FEXPORT(__bzero)
+	sltiu		t0, a2, LONGSIZE	/* very small region? */
+	bnez		t0, small_memset
+	 andi		t0, a0, LONGMASK	/* aligned? */
+
+	beqz		t0, 1f
+	 PTR_SUBU	t0, LONGSIZE		/* alignment in bytes */
+
+#ifdef __MIPSEB__
+	EX(sdl, a1, (a0), first_fixup)		/* make dword aligned */
+#endif
+#ifdef __MIPSEL__
+	EX(sdr, a1, (a0), first_fixup)		/* make dword aligned */
+#endif
+	PTR_SUBU	a0, t0			/* long align ptr */
+	PTR_ADDU	a2, t0			/* correct size */
+
+1:	ori		t1, a2, 0x3f		/* # of full blocks */
+	xori		t1, 0x3f
+	beqz		t1, memset_partial	/* no block to fill */
+	 andi		t0, a2, 0x38
+
+	PTR_ADDU	t1, a0			/* end address */
+	.set		reorder
+1:	PTR_ADDIU	a0, 64
+	f_fill64 a0, -64, a1, fwd_fixup
+	bne		t1, a0, 1b
+	.set		noreorder
+
+memset_partial:
+	PTR_LA		t1, 2f			/* where to start */
+	.set		noat
+	dsrl		AT, t0, 1
+	PTR_SUBU	t1, AT
+	.set		noat
+	jr		t1
+	 PTR_ADDU	a0, t0			/* dest ptr */
+
+	.set		push
+	.set		noreorder
+	.set		nomacro
+	f_fill64 a0, -64, a1, partial_fixup	/* ... but first do longs ... */
+2:	.set		pop
+	andi		a2, LONGMASK		/* At most one long to go */
+
+	beqz		a2, 1f
+	 PTR_ADDU	a0, a2			/* What's left */
+#ifdef __MIPSEB__
+	EX(sdr, a1, -1(a0), last_fixup)
+#endif
+#ifdef __MIPSEL__
+	EX(sdl, a1, -1(a0), last_fixup)
+#endif
+1:	jr		ra
+	 move		a2, zero
+
+small_memset:
+	beqz		a2, 2f
+	 PTR_ADDU	t1, a0, a2
+
+1:	PTR_ADDIU	a0, 1			/* fill bytewise */
+	bne		t1, a0, 1b
+	 sb		a1, -1(a0)
+
+2:	jr		ra			/* done */
+	 move		a2, zero
+	END(memset)
+
+first_fixup:
+	jr	ra
+	 nop
+
+fwd_fixup:
+	PTR_L		t0, TI_TASK($28)
+	LONG_L		t0, THREAD_BUADDR(t0)
+	andi		a2, 0x3f
+	LONG_ADDU	a2, t1
+	jr		ra
+	 LONG_SUBU	a2, t0
+
+partial_fixup:
+	PTR_L		t0, TI_TASK($28)
+	LONG_L		t0, THREAD_BUADDR(t0)
+	andi		a2, LONGMASK
+	LONG_ADDU	a2, t1
+	jr		ra
+	 LONG_SUBU	a2, t0
+
+last_fixup:
+	jr		ra
+	 andi		v1, a2, LONGMASK
diff --git a/arch/mips/lib-64/watch.S b/arch/mips/lib-64/watch.S
new file mode 100644
index 0000000..f914340
--- /dev/null
+++ b/arch/mips/lib-64/watch.S
@@ -0,0 +1,57 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Kernel debug stuff to use the Watch registers.
+ * Useful to find stack overflows, dangling pointers etc.
+ *
+ * Copyright (C) 1995, 1996, 1999, 2001 by Ralf Baechle
+ */
+#include <asm/asm.h>
+#include <asm/mipsregs.h>
+#include <asm/regdef.h>
+
+		.set	noreorder
+/*
+ * Parameter: a0 - physical address to watch
+ *            a1 - set bit #1 to trap on load references
+ *                     bit #0 to trap on store references
+ * Results  : none
+ */
+		LEAF(__watch_set)
+		ori	a0, 7
+		xori	a0, 7
+		or	a0, a1
+		mtc0	a0, CP0_WATCHLO
+		sd	a0, watch_savelo
+		dsrl32	a0, a0, 0
+
+		jr	ra
+		 mtc0	zero, CP0_WATCHHI
+		END(__watch_set)
+
+/*
+ * Parameter: none
+ * Results  : none
+ */
+		LEAF(__watch_clear)
+		jr	ra
+		 mtc0	zero, CP0_WATCHLO
+		END(__watch_clear)
+
+/*
+ * Parameter: none
+ * Results  : none
+ */
+		LEAF(__watch_reenable)
+		ld	t0, watch_savelo
+		jr	ra
+		 mtc0	t0, CP0_WATCHLO
+		END(__watch_reenable)
+
+/*
+ * Saved value of the c0_watchlo register for watch_reenable()
+ */
+		.local	watch_savelo
+		.comm	watch_savelo, 8, 8