Merge commit 'v2.6.27-rc6' into x86/iommu

1 files changed, 355 insertions, 0 deletions

diff --git a/arch/blackfin/include/asm/context.S b/arch/blackfin/include/asm/context.S
new file mode 100644
index 000000000000..c0e630edfb9a
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+++ b/arch/blackfin/include/asm/context.S
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+/*
+ * File:         arch/blackfin/kernel/context.S
+ * Based on:
+ * Author:
+ *
+ * Created:
+ * Description:
+ *
+ * Modified:
+ *               Copyright 2004-2007 Analog Devices Inc.
+ *
+ * Bugs:         Enter bugs at http://blackfin.uclinux.org/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+/*
+ * NOTE!  The single-stepping code assumes that all interrupt handlers
+ * start by saving SYSCFG on the stack with their first instruction.
+ */
+
+/*
+ * Code to save processor context.
+ *  We even save the register which are preserved by a function call
+ *	 - r4, r5, r6, r7, p3, p4, p5
+ */
+.macro save_context_with_interrupts
+	[--sp] = SYSCFG;
+
+	[--sp] = P0;	/*orig_p0*/
+	[--sp] = R0;	/*orig_r0*/
+
+	[--sp] = ( R7:0, P5:0 );
+	[--sp] = fp;
+	[--sp] = usp;
+
+	[--sp] = i0;
+	[--sp] = i1;
+	[--sp] = i2;
+	[--sp] = i3;
+
+	[--sp] = m0;
+	[--sp] = m1;
+	[--sp] = m2;
+	[--sp] = m3;
+
+	[--sp] = l0;
+	[--sp] = l1;
+	[--sp] = l2;
+	[--sp] = l3;
+
+	[--sp] = b0;
+	[--sp] = b1;
+	[--sp] = b2;
+	[--sp] = b3;
+	[--sp] = a0.x;
+	[--sp] = a0.w;
+	[--sp] = a1.x;
+	[--sp] = a1.w;
+
+	[--sp] = LC0;
+	[--sp] = LC1;
+	[--sp] = LT0;
+	[--sp] = LT1;
+	[--sp] = LB0;
+	[--sp] = LB1;
+
+	[--sp] = ASTAT;
+
+	[--sp] = r0;	/* Skip reserved */
+	[--sp] = RETS;
+	r0 = RETI;
+	[--sp] = r0;
+	[--sp] = RETX;
+	[--sp] = RETN;
+	[--sp] = RETE;
+	[--sp] = SEQSTAT;
+	[--sp] = r0;	/* Skip IPEND as well. */
+	/* Switch to other method of keeping interrupts disabled.  */
+#ifdef CONFIG_DEBUG_HWERR
+	r0 = 0x3f;
+	sti r0;
+#else
+	cli r0;
+#endif
+	[--sp] = RETI;  /*orig_pc*/
+	/* Clear all L registers.  */
+	r0 = 0 (x);
+	l0 = r0;
+	l1 = r0;
+	l2 = r0;
+	l3 = r0;
+.endm
+
+.macro save_context_syscall
+	[--sp] = SYSCFG;
+
+	[--sp] = P0;	/*orig_p0*/
+	[--sp] = R0;	/*orig_r0*/
+	[--sp] = ( R7:0, P5:0 );
+	[--sp] = fp;
+	[--sp] = usp;
+
+	[--sp] = i0;
+	[--sp] = i1;
+	[--sp] = i2;
+	[--sp] = i3;
+
+	[--sp] = m0;
+	[--sp] = m1;
+	[--sp] = m2;
+	[--sp] = m3;
+
+	[--sp] = l0;
+	[--sp] = l1;
+	[--sp] = l2;
+	[--sp] = l3;
+
+	[--sp] = b0;
+	[--sp] = b1;
+	[--sp] = b2;
+	[--sp] = b3;
+	[--sp] = a0.x;
+	[--sp] = a0.w;
+	[--sp] = a1.x;
+	[--sp] = a1.w;
+
+	[--sp] = LC0;
+	[--sp] = LC1;
+	[--sp] = LT0;
+	[--sp] = LT1;
+	[--sp] = LB0;
+	[--sp] = LB1;
+
+	[--sp] = ASTAT;
+
+	[--sp] = r0;	/* Skip reserved */
+	[--sp] = RETS;
+	r0 = RETI;
+	[--sp] = r0;
+	[--sp] = RETX;
+	[--sp] = RETN;
+	[--sp] = RETE;
+	[--sp] = SEQSTAT;
+	[--sp] = r0;	/* Skip IPEND as well. */
+	[--sp] = RETI;  /*orig_pc*/
+	/* Clear all L registers.  */
+	r0 = 0 (x);
+	l0 = r0;
+	l1 = r0;
+	l2 = r0;
+	l3 = r0;
+.endm
+
+.macro save_context_no_interrupts
+	[--sp] = SYSCFG;
+	[--sp] = P0;	/* orig_p0 */
+	[--sp] = R0;	/* orig_r0 */
+	[--sp] = ( R7:0, P5:0 );
+	[--sp] = fp;
+	[--sp] = usp;
+
+	[--sp] = i0;
+	[--sp] = i1;
+	[--sp] = i2;
+	[--sp] = i3;
+
+	[--sp] = m0;
+	[--sp] = m1;
+	[--sp] = m2;
+	[--sp] = m3;
+
+	[--sp] = l0;
+	[--sp] = l1;
+	[--sp] = l2;
+	[--sp] = l3;
+
+	[--sp] = b0;
+	[--sp] = b1;
+	[--sp] = b2;
+	[--sp] = b3;
+	[--sp] = a0.x;
+	[--sp] = a0.w;
+	[--sp] = a1.x;
+	[--sp] = a1.w;
+
+	[--sp] = LC0;
+	[--sp] = LC1;
+	[--sp] = LT0;
+	[--sp] = LT1;
+	[--sp] = LB0;
+	[--sp] = LB1;
+
+	[--sp] = ASTAT;
+
+#ifdef CONFIG_KGDB
+	fp     = 0(Z);
+	r1     = sp;
+	r1    += 60;
+	r1    += 60;
+	r1    += 60;
+	[--sp] = r1;
+#else
+	[--sp] = r0;	/* Skip reserved */
+#endif
+	[--sp] = RETS;
+	r0 = RETI;
+	[--sp] = r0;
+	[--sp] = RETX;
+	[--sp] = RETN;
+	[--sp] = RETE;
+	[--sp] = SEQSTAT;
+#ifdef CONFIG_KGDB
+	r1.l = lo(IPEND);
+	r1.h = hi(IPEND);
+	[--sp] = r1;
+#else
+	[--sp] = r0;	/* Skip IPEND as well. */
+#endif
+	[--sp] = r0;  /*orig_pc*/
+	/* Clear all L registers.  */
+	r0 = 0 (x);
+	l0 = r0;
+	l1 = r0;
+	l2 = r0;
+	l3 = r0;
+.endm
+
+.macro restore_context_no_interrupts
+	sp += 4;	/* Skip orig_pc */
+	sp += 4;	/* Skip IPEND */
+	SEQSTAT = [sp++];
+	RETE = [sp++];
+	RETN = [sp++];
+	RETX = [sp++];
+	r0 = [sp++];
+	RETI = r0;	/* Restore RETI indirectly when in exception */
+	RETS = [sp++];
+
+	sp += 4;	/* Skip Reserved */
+
+	ASTAT = [sp++];
+
+	LB1 = [sp++];
+	LB0 = [sp++];
+	LT1 = [sp++];
+	LT0 = [sp++];
+	LC1 = [sp++];
+	LC0 = [sp++];
+
+	a1.w = [sp++];
+	a1.x = [sp++];
+	a0.w = [sp++];
+	a0.x = [sp++];
+	b3 = [sp++];
+	b2 = [sp++];
+	b1 = [sp++];
+	b0 = [sp++];
+
+	l3 = [sp++];
+	l2 = [sp++];
+	l1 = [sp++];
+	l0 = [sp++];
+
+	m3 = [sp++];
+	m2 = [sp++];
+	m1 = [sp++];
+	m0 = [sp++];
+
+	i3 = [sp++];
+	i2 = [sp++];
+	i1 = [sp++];
+	i0 = [sp++];
+
+	sp += 4;
+	fp = [sp++];
+
+	( R7 : 0, P5 : 0) = [ SP ++ ];
+	sp += 8;	/* Skip orig_r0/orig_p0 */
+	SYSCFG = [sp++];
+.endm
+
+.macro restore_context_with_interrupts
+	sp += 4;	/* Skip orig_pc */
+	sp += 4;	/* Skip IPEND */
+	SEQSTAT = [sp++];
+	RETE = [sp++];
+	RETN = [sp++];
+	RETX = [sp++];
+	RETI = [sp++];
+	RETS = [sp++];
+
+	p0.h = _irq_flags;
+	p0.l = _irq_flags;
+	r0 = [p0];
+	sti r0;
+
+	sp += 4;	/* Skip Reserved */
+
+	ASTAT = [sp++];
+
+	LB1 = [sp++];
+	LB0 = [sp++];
+	LT1 = [sp++];
+	LT0 = [sp++];
+	LC1 = [sp++];
+	LC0 = [sp++];
+
+	a1.w = [sp++];
+	a1.x = [sp++];
+	a0.w = [sp++];
+	a0.x = [sp++];
+	b3 = [sp++];
+	b2 = [sp++];
+	b1 = [sp++];
+	b0 = [sp++];
+
+	l3 = [sp++];
+	l2 = [sp++];
+	l1 = [sp++];
+	l0 = [sp++];
+
+	m3 = [sp++];
+	m2 = [sp++];
+	m1 = [sp++];
+	m0 = [sp++];
+
+	i3 = [sp++];
+	i2 = [sp++];
+	i1 = [sp++];
+	i0 = [sp++];
+
+	sp += 4;
+	fp = [sp++];
+
+	( R7 : 0, P5 : 0) = [ SP ++ ];
+	sp += 8;	/* Skip orig_r0/orig_p0 */
+	csync;
+	SYSCFG = [sp++];
+	csync;
+.endm
+