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Diffstat (limited to 'arch/mips/include/asm/mach-ip27/kernel-entry-init.h')
-rw-r--r--arch/mips/include/asm/mach-ip27/kernel-entry-init.h59
1 files changed, 59 insertions, 0 deletions
diff --git a/arch/mips/include/asm/mach-ip27/kernel-entry-init.h b/arch/mips/include/asm/mach-ip27/kernel-entry-init.h
new file mode 100644
index 000000000000..624d66c7f290
--- /dev/null
+++ b/arch/mips/include/asm/mach-ip27/kernel-entry-init.h
@@ -0,0 +1,59 @@
+/*
+ * 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) 2000 Silicon Graphics, Inc.
+ * Copyright (C) 2005 Ralf Baechle <ralf@linux-mips.org>
+ */
+#ifndef __ASM_MACH_IP27_KERNEL_ENTRY_H
+#define __ASM_MACH_IP27_KERNEL_ENTRY_H
+
+#include <asm/sn/addrs.h>
+#include <asm/sn/sn0/hubni.h>
+#include <asm/sn/klkernvars.h>
+
+/*
+ * Returns the local nasid into res.
+ */
+ .macro GET_NASID_ASM res
+ dli \res, LOCAL_HUB_ADDR(NI_STATUS_REV_ID)
+ ld \res, (\res)
+ and \res, NSRI_NODEID_MASK
+ dsrl \res, NSRI_NODEID_SHFT
+ .endm
+
+/*
+ * Intentionally empty macro, used in head.S. Override in
+ * arch/mips/mach-xxx/kernel-entry-init.h when necessary.
+ */
+ .macro kernel_entry_setup
+ GET_NASID_ASM t1
+ move t2, t1 # text and data are here
+ MAPPED_KERNEL_SETUP_TLB
+ .endm
+
+/*
+ * Do SMP slave processor setup necessary before we can savely execute C code.
+ */
+ .macro smp_slave_setup
+ GET_NASID_ASM t1
+ dli t0, KLDIR_OFFSET + (KLI_KERN_VARS * KLDIR_ENT_SIZE) + \
+ KLDIR_OFF_POINTER + CAC_BASE
+ dsll t1, NASID_SHFT
+ or t0, t0, t1
+ ld t0, 0(t0) # t0 points to kern_vars struct
+ lh t1, KV_RO_NASID_OFFSET(t0)
+ lh t2, KV_RW_NASID_OFFSET(t0)
+ MAPPED_KERNEL_SETUP_TLB
+
+ /*
+ * We might not get launched at the address the kernel is linked to,
+ * so we jump there.
+ */
+ PTR_LA t0, 0f
+ jr t0
+0:
+ .endm
+
+#endif /* __ASM_MACH_IP27_KERNEL_ENTRY_H */