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
6 * Copyright (C) 2000 Silicon Graphics, Inc.
7 * Copyright (C) 2005 Ralf Baechle <ralf@linux-mips.org>
9 #ifndef __ASM_MACH_IP27_KERNEL_ENTRY_H
10 #define __ASM_MACH_IP27_KERNEL_ENTRY_H
12 #include <asm/sn/addrs.h>
13 #include <asm/sn/sn0/hubni.h>
14 #include <asm/sn/klkernvars.h>
17 * Returns the local nasid into res.
19 .macro GET_NASID_ASM res
20 dli
\res
, LOCAL_HUB_ADDR(NI_STATUS_REV_ID
)
22 and \res
, NSRI_NODEID_MASK
23 dsrl
\res
, NSRI_NODEID_SHFT
29 #define PAGE_GLOBAL (1 << 6)
30 #define PAGE_VALID (1 << 7)
31 #define PAGE_DIRTY (1 << 8)
32 #define CACHE_CACHABLE_COW (5 << 9)
35 * inputs are the text nasid in t1, data nasid in t2.
37 .macro MAPPED_KERNEL_SETUP_TLB
38 #ifdef CONFIG_MAPPED_KERNEL
40 * This needs to read the nasid - assume 0 for now.
41 * Drop in 0xffffffffc0000000 in tlbhi, 0+VG in tlblo_0,
44 dli t0
, 0xffffffffc0000000
46 li t0
, 0x1c000 # Offset of text into node memory
47 dsll t1
, NASID_SHFT
# Shift text nasid into place
48 dsll t2
, NASID_SHFT
# Same for data nasid
49 or t1
, t1
, t0
# Physical load address of kernel text
50 or t2
, t2
, t0
# Physical load address of kernel data
53 dsll t1
, 6 # Get pfn into place
54 dsll t2
, 6 # Get pfn into place
55 li t0
, ((PAGE_GLOBAL
| PAGE_VALID
| CACHE_CACHABLE_COW
) >> 6)
57 mtc0 t0
, CP0_ENTRYLO0
# physaddr, VG, cach exlwr
58 li t0
, ((PAGE_GLOBAL
| PAGE_VALID
| PAGE_DIRTY
| CACHE_CACHABLE_COW
) >> 6)
60 mtc0 t0
, CP0_ENTRYLO1
# physaddr, DVG, cach exlwr
61 li t0
, 0x1ffe000 # MAPPED_KERN_TLBMASK, TLBPGMASK_16M
74 * Intentionally empty macro, used in head.S. Override in
75 * arch/mips/mach-xxx/kernel-entry-init.h when necessary.
77 .macro kernel_entry_setup
79 move t2
, t1
# text and data are here
80 MAPPED_KERNEL_SETUP_TLB
84 * Do SMP slave processor setup necessary before we can savely execute C code.
86 .macro smp_slave_setup
88 dli t0
, KLDIR_OFFSET
+ (KLI_KERN_VARS
* KLDIR_ENT_SIZE
) + \
89 KLDIR_OFF_POINTER
+ CAC_BASE
92 ld t0
, 0(t0
) # t0 points to kern_vars struct
93 lh t1
, KV_RO_NASID_OFFSET(t0
)
94 lh t2
, KV_RW_NASID_OFFSET(t0
)
95 MAPPED_KERNEL_SETUP_TLB
98 * We might not get launched at the address the kernel is linked to,
106 #endif /* __ASM_MACH_IP27_KERNEL_ENTRY_H */