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1 /*
2  * This file is subject to the terms and conditions of the GNU General Public
3  * License.  See the file "COPYING" in the main directory of this archive
4  * for more details.
5  *
6  * Copyright (C) 2000 Silicon Graphics, Inc.
7  * Copyright (C) 2005 Ralf Baechle <ralf@linux-mips.org>
8  */
9 #ifndef __ASM_MACH_IP27_KERNEL_ENTRY_H
10 #define __ASM_MACH_IP27_KERNEL_ENTRY_H
11
12 #include <asm/sn/addrs.h>
13 #include <asm/sn/sn0/hubni.h>
14 #include <asm/sn/klkernvars.h>
15
16 /*
17  * Returns the local nasid into res.
18  */
19         .macro GET_NASID_ASM res
20         dli     \res, LOCAL_HUB_ADDR(NI_STATUS_REV_ID)
21         ld      \res, (\res)
22         and     \res, NSRI_NODEID_MASK
23         dsrl    \res, NSRI_NODEID_SHFT
24         .endm
25
26 /*
27  * Intentionally empty macro, used in head.S. Override in
28  * arch/mips/mach-xxx/kernel-entry-init.h when necessary.
29  */
30         .macro  kernel_entry_setup
31         GET_NASID_ASM   t1
32         move            t2, t1                  # text and data are here
33         MAPPED_KERNEL_SETUP_TLB
34         .endm
35
36 /*
37  * Do SMP slave processor setup necessary before we can savely execute C code.
38  */
39         .macro  smp_slave_setup
40         GET_NASID_ASM   t1
41         dli     t0, KLDIR_OFFSET + (KLI_KERN_VARS * KLDIR_ENT_SIZE) + \
42                     KLDIR_OFF_POINTER + CAC_BASE
43         dsll    t1, NASID_SHFT
44         or      t0, t0, t1
45         ld      t0, 0(t0)                       # t0 points to kern_vars struct
46         lh      t1, KV_RO_NASID_OFFSET(t0)
47         lh      t2, KV_RW_NASID_OFFSET(t0)
48         MAPPED_KERNEL_SETUP_TLB
49         ARC64_TWIDDLE_PC
50         .endm
51
52 #endif /* __ASM_MACH_IP27_KERNEL_ENTRY_H */