SMP support for the mips port.

The platform that supports SMP currently is a SWARM with a dual-core Sibyte
processor. The kernel config file to use is SWARM_SMP.

Reviewed by: imp, rrs

1 files changed, 72 insertions, 0 deletions

diff --git a/sys/mips/mips/mpboot.S b/sys/mips/mips/mpboot.S
new file mode 100644
index 0000000..6828847
--- /dev/null
+++ b/sys/mips/mips/mpboot.S
@@ -0,0 +1,72 @@
+/*-
+ * Copyright (c) 2010 Neelkanth Natu
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#include <machine/asm.h>
+#include <machine/cpu.h>
+#include <machine/cpuregs.h>
+
+#include "assym.s"
+
+	.text
+	.set	noat
+	.set	noreorder
+
+GLOBAL(mpentry)
+	mtc0	zero, COP_0_STATUS_REG	/* disable interrupts */
+
+	mtc0	zero, COP_0_CAUSE_REG	/* clear soft interrupts */
+
+	li	t0, CFG_K0_CACHED	/* make sure kseg0 is cached */
+	mtc0	t0, MIPS_COP_0_CONFIG
+	COP0_SYNC
+
+	jal	platform_processor_id	/* get the processor number */
+	nop
+	move	s0, v0
+
+	/*
+	 * Initialize stack and call machine startup
+	 */
+	PTR_LA	sp, _C_LABEL(pcpu_space)
+	addiu	sp, (NBPG * 2) - START_FRAME
+	sll	t0, s0, PAGE_SHIFT + 1
+	addu	sp, sp, t0
+
+	/* Zero out old ra and old fp for debugger */
+	sw      zero, START_FRAME - 4(sp)
+	sw      zero, START_FRAME - 8(sp)
+
+	PTR_LA	gp, _C_LABEL(_gp)
+
+	jal	platform_init_ap
+	move	a0, s0
+
+	jal	smp_init_secondary
+	move	a0, s0
+
+	PANIC("AP startup failed!")