To modify Ixia port numbers and IP in pod.yaml
[kvmfornfv.git] / kernel / arch / mips / dec / wbflush.c
1 /*
2  * Setup the right wbflush routine for the different DECstations.
3  *
4  * Created with information from:
5  *      DECstation 3100 Desktop Workstation Functional Specification
6  *      DECstation 5000/200 KN02 System Module Functional Specification
7  *      mipsel-linux-objdump --disassemble vmunix | grep "wbflush" :-)
8  *
9  * This file is subject to the terms and conditions of the GNU General Public
10  * License.  See the file "COPYING" in the main directory of this archive
11  * for more details.
12  *
13  * Copyright (C) 1998 Harald Koerfgen
14  * Copyright (C) 2002 Maciej W. Rozycki
15  */
16
17 #include <linux/init.h>
18
19 #include <asm/bootinfo.h>
20 #include <asm/wbflush.h>
21 #include <asm/barrier.h>
22
23 static void wbflush_kn01(void);
24 static void wbflush_kn210(void);
25 static void wbflush_mips(void);
26
27 void (*__wbflush) (void);
28
29 void __init wbflush_setup(void)
30 {
31         switch (mips_machtype) {
32         case MACH_DS23100:
33         case MACH_DS5000_200:   /* DS5000 3max */
34                 __wbflush = wbflush_kn01;
35                 break;
36         case MACH_DS5100:       /* DS5100 MIPSMATE */
37                 __wbflush = wbflush_kn210;
38                 break;
39         case MACH_DS5000_1XX:   /* DS5000/100 3min */
40         case MACH_DS5000_XX:    /* Personal DS5000/2x */
41         case MACH_DS5000_2X0:   /* DS5000/240 3max+ */
42         case MACH_DS5900:       /* DS5900 bigmax */
43         default:
44                 __wbflush = wbflush_mips;
45                 break;
46         }
47 }
48
49 /*
50  * For the DS3100 and DS5000/200 the R2020/R3220 writeback buffer functions
51  * as part of Coprocessor 0.
52  */
53 static void wbflush_kn01(void)
54 {
55     asm(".set\tpush\n\t"
56         ".set\tnoreorder\n\t"
57         "1:\tbc0f\t1b\n\t"
58         "nop\n\t"
59         ".set\tpop");
60 }
61
62 /*
63  * For the DS5100 the writeback buffer seems to be a part of Coprocessor 3.
64  * But CP3 has to enabled first.
65  */
66 static void wbflush_kn210(void)
67 {
68     asm(".set\tpush\n\t"
69         ".set\tnoreorder\n\t"
70         "mfc0\t$2,$12\n\t"
71         "lui\t$3,0x8000\n\t"
72         "or\t$3,$2,$3\n\t"
73         "mtc0\t$3,$12\n\t"
74         "nop\n"
75         "1:\tbc3f\t1b\n\t"
76         "nop\n\t"
77         "mtc0\t$2,$12\n\t"
78         "nop\n\t"
79         ".set\tpop"
80         : : : "$2", "$3");
81 }
82
83 /*
84  * I/O ASIC systems use a standard writeback buffer that gets flushed
85  * upon an uncached read.
86  */
87 static void wbflush_mips(void)
88 {
89         __fast_iob();
90 }
91
92 #include <linux/module.h>
93
94 EXPORT_SYMBOL(__wbflush);