1 files changed, 272 insertions, 0 deletions
diff --git a/arch/mips/netlogic/common/smpboot.S b/arch/mips/netlogic/common/smpboot.S
new file mode 100644
index 000000000000..c138b1a6dec3
--- /dev/null
+++ b/arch/mips/netlogic/common/smpboot.S
@@ -0,0 +1,272 @@
+/*
+ * Copyright 2003-2011 NetLogic Microsystems, Inc. (NetLogic). All rights
+ * reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the NetLogic
+ * license below:
+ *
+ * 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 NETLOGIC ``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 NETLOGIC 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.
+ */
+
+#include <linux/init.h>
+
+#include <asm/asm.h>
+#include <asm/asm-offsets.h>
+#include <asm/regdef.h>
+#include <asm/mipsregs.h>
+#include <asm/stackframe.h>
+#include <asm/asmmacro.h>
+#include <asm/addrspace.h>
+
+#include <asm/netlogic/common.h>
+
+#include <asm/netlogic/xlp-hal/iomap.h>
+#include <asm/netlogic/xlp-hal/xlp.h>
+#include <asm/netlogic/xlp-hal/sys.h>
+#include <asm/netlogic/xlp-hal/cpucontrol.h>
+
+#define	CP0_EBASE	$15
+#define SYS_CPU_COHERENT_BASE(node)	CKSEG1ADDR(XLP_DEFAULT_IO_BASE) + \
+			XLP_IO_SYS_OFFSET(node) + XLP_IO_PCI_HDRSZ + \
+			SYS_CPU_NONCOHERENT_MODE * 4
+
+.macro __config_lsu
+	li      t0, LSU_DEFEATURE
+	mfcr    t1, t0
+
+	lui     t2, 0x4080  /* Enable Unaligned Access, L2HPE */
+	or      t1, t1, t2
+	li	t2, ~0xe    /* S1RCM */
+	and	t1, t1, t2
+	mtcr    t1, t0
+
+	li      t0, SCHED_DEFEATURE
+	lui     t1, 0x0100  /* Experimental: Disable BRU accepting ALU ops */
+	mtcr    t1, t0
+.endm
+
+/*
+ * The cores can come start when they are woken up. This is also the NMI
+ * entry, so check that first.
+ *
+ * The data corresponding to reset is stored at RESET_DATA_PHYS location,
+ * this will have the thread mask (used when core is woken up) and the
+ * current NMI handler in case we reached here for an NMI.
+ *
+ * When a core or thread is newly woken up, it loops in a 'wait'. When
+ * the CPU really needs waking up, we send an NMI to it, with the NMI
+ * handler set to prom_boot_secondary_cpus
+ */
+
+	.set	noreorder
+	.set	noat
+	.set	arch=xlr	/* for mfcr/mtcr, XLR is sufficient */
+
+FEXPORT(nlm_reset_entry)
+	dmtc0	k0, $22, 6
+	dmtc0	k1, $22, 7
+	mfc0    k0, CP0_STATUS
+	li      k1, 0x80000
+	and     k1, k0, k1
+	beqz    k1, 1f         /* go to real reset entry */
+	nop
+	li	k1, CKSEG1ADDR(RESET_DATA_PHYS)   /* NMI */
+	ld	k0, BOOT_NMI_HANDLER(k1)
+	jr	k0
+	nop
+
+1:	/* Entry point on core wakeup */
+	mfc0	t0, CP0_EBASE, 1
+	mfc0	t1, CP0_EBASE, 1
+	srl	t1, 5
+	andi	t1, 0x3			/* t1 <- node */
+	li	t2, 0x40000
+	mul	t3, t2, t1		/* t3 = node * 0x40000 */
+	srl	t0, t0, 2
+	and	t0, t0, 0x7		/* t0 <- core */
+	li	t1, 0x1
+	sll	t0, t1, t0
+	nor	t0, t0, zero		/* t0 <- ~(1 << core) */
+	li	t2, SYS_CPU_COHERENT_BASE(0)
+	add	t2, t2, t3		/* t2 <- SYS offset for node */
+	lw	t1, 0(t2)
+	and     t1, t1, t0
+	sw      t1, 0(t2)
+
+	/* read back to ensure complete */
+	lw      t1, 0(t2)
+	sync
+
+	/* Configure LSU on Non-0 Cores. */
+	__config_lsu
+
+/*
+ * Wake up sibling threads from the initial thread in
+ * a core.
+ */
+EXPORT(nlm_boot_siblings)
+	li	t0, CKSEG1ADDR(RESET_DATA_PHYS)
+	lw	t1, BOOT_THREAD_MODE(t0)	/* t1 <- thread mode */
+	li	t0, ((CPU_BLOCKID_MAP << 8) | MAP_THREADMODE)
+	mfcr	t2, t0
+	or	t2, t2, t1
+	mtcr	t2, t0
+
+	/*
+	 * The new hardware thread starts at the next instruction
+	 * For all the cases other than core 0 thread 0, we will
+         * jump to the secondary wait function.
+         */
+	mfc0	v0, CP0_EBASE, 1
+	andi	v0, 0x7f		/* v0 <- node/core */
+
+#if 1
+	/* A0 errata - Write MMU_SETUP after changing thread mode register. */
+	andi	v1, v0, 0x3		/* v1 <- thread id */
+	bnez	v1, 2f
+	nop
+
+        li	t0, MMU_SETUP
+        li	t1, 0
+        mtcr	t1, t0
+	ehb
+#endif
+
+2:	beqz	v0, 4f
+	nop
+
+	/* setup status reg */
+	mfc0	t1, CP0_STATUS
+	li	t0, ST0_BEV
+	or	t1, t0
+	xor	t1, t0
+#ifdef CONFIG_64BIT
+	ori	t1, ST0_KX
+#endif
+	mtc0	t1, CP0_STATUS
+	/* mark CPU ready */
+	PTR_LA	t1, nlm_cpu_ready
+	sll	v1, v0, 2
+	PTR_ADDU t1, v1
+	li	t2, 1
+	sw	t2, 0(t1)
+	/* Wait until NMI hits */
+3:	wait
+	j	3b
+	nop
+
+	/*
+	 * For the boot CPU, we have to restore registers and
+	 * return
+	 */
+4:	dmfc0	t0, $4, 2       /* restore SP from UserLocal */
+	li	t1, 0xfadebeef
+	dmtc0	t1, $4, 2       /* restore SP from UserLocal */
+	PTR_SUBU sp, t0, PT_SIZE
+	RESTORE_ALL
+	jr   ra
+	nop
+EXPORT(nlm_reset_entry_end)
+
+FEXPORT(xlp_boot_core0_siblings)	/* "Master" cpu starts from here */
+	__config_lsu
+	dmtc0   sp, $4, 2		/* SP saved in UserLocal */
+	SAVE_ALL
+	sync
+	/* find the location to which nlm_boot_siblings was relocated */
+	li	t0, CKSEG1ADDR(RESET_VEC_PHYS)
+	dla	t1, nlm_reset_entry
+	dla	t2, nlm_boot_siblings
+	dsubu	t2, t1
+	daddu	t2, t0
+	/* call it */
+	jr	t2
+	nop
+	/* not reached */
+
+	__CPUINIT
+NESTED(nlm_boot_secondary_cpus, 16, sp)
+	PTR_LA	t1, nlm_next_sp
+	PTR_L	sp, 0(t1)
+	PTR_LA	t1, nlm_next_gp
+	PTR_L	gp, 0(t1)
+
+	/* a0 has the processor id */
+	PTR_LA	t0, nlm_early_init_secondary
+	jalr	t0
+	nop
+
+	PTR_LA	t0, smp_bootstrap
+	jr	t0
+	nop
+END(nlm_boot_secondary_cpus)
+	__FINIT
+
+/*
+ * In case of RMIboot bootloader which is used on XLR boards, the CPUs
+ * be already woken up and waiting in bootloader code.
+ * This will get them out of the bootloader code and into linux. Needed
+ *  because the bootloader area will be taken and initialized by linux.
+ */
+	__CPUINIT
+NESTED(nlm_rmiboot_preboot, 16, sp)
+	mfc0	t0, $15, 1	# read ebase
+	andi	t0, 0x1f	# t0 has the processor_id()
+	andi	t2, t0, 0x3	# thread no
+	sll	t0, 2		# offset in cpu array
+
+	PTR_LA	t1, nlm_cpu_ready # mark CPU ready
+	PTR_ADDU t1, t0
+	li	t3, 1
+	sw	t3, 0(t1)
+
+	bnez	t2, 1f		# skip thread programming
+	nop			# for non zero hw threads
+
+	/*
+	 * MMU setup only for first thread in core
+	 */
+	li	t0, 0x400
+	mfcr	t1, t0
+	li	t2, 6 		# XLR thread mode mask
+	nor	t3, t2, zero
+	and	t2, t1, t2	# t2 - current thread mode
+	li	v0, CKSEG1ADDR(RESET_DATA_PHYS)
+	lw	v1, BOOT_THREAD_MODE(v0) # v1 - new thread mode
+	sll	v1, 1
+	beq	v1, t2, 1f 	# same as request value
+	nop			# nothing to do */
+
+	and	t2, t1, t3	# mask out old thread mode
+	or	t1, t2, v1	# put in new value
+	mtcr	t1, t0		# update core control
+
+1:	wait
+	j	1b
+	nop
+END(nlm_rmiboot_preboot)
+	__FINIT