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1 | // ========== Copyright Header Begin ========================================== |
2 | // | |
3 | // OpenSPARC T2 Processor File: iob.cc | |
4 | // Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved. | |
5 | // DO NOT ALTER OR REMOVE COPYRIGHT NOTICES. | |
6 | // | |
7 | // The above named program is free software; you can redistribute it and/or | |
8 | // modify it under the terms of the GNU General Public | |
9 | // License version 2 as published by the Free Software Foundation. | |
10 | // | |
11 | // The above named program is distributed in the hope that it will be | |
12 | // useful, but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | // General Public License for more details. | |
15 | // | |
16 | // You should have received a copy of the GNU General Public | |
17 | // License along with this work; if not, write to the Free Software | |
18 | // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. | |
19 | // | |
20 | // ========== Copyright Header End ============================================ | |
21 | /* iob.C | |
22 | * handle IOB (I/O space) T1 addresses for blaze/SAM | |
23 | * | |
24 | * Copyright (c) 2004 by Sun Microsystems, Inc. | |
25 | * All rights reserved. | |
26 | * | |
27 | */ | |
28 | ||
29 | ||
30 | #include <stdio.h> | |
31 | #include <stdlib.h> | |
32 | #include <string.h> | |
33 | #include <errno.h> | |
34 | #include <sys/syscall.h> // get exec number | |
35 | #include <sys/types.h> // uid_t | |
36 | #include <unistd.h> // getuid() | |
37 | #include <inttypes.h> | |
38 | #include <stdarg.h> | |
39 | ||
40 | #include <thread.h> | |
41 | ||
42 | #include "mmi.h" | |
43 | #include "ui.h" | |
44 | ||
45 | struct sam_iob_s { | |
46 | uint64_t startpa; | |
47 | uint64_t endpa; | |
48 | uint64_t sz; | |
49 | }; // struct sam_iob.C | |
50 | ||
51 | ||
52 | extern "C" int iob_access(uint32_t cpuid, void* obj, uint64_t paddr, mmi_bool_t wr, uint32_t size, uint64_t* buf, uint8_t bytemask); | |
53 | ||
54 | int iob_ld_operation (void *cd, uint64_t paddr, uint64_t *buf, int sz, uint32_t cpuid); | |
55 | int iob_st_operation (void *cd, uint64_t paddr, uint64_t *buf, int sz, uint32_t cpuid); | |
56 | ||
57 | extern "C" void iob_create_instance (const char *modname, const char *instance_name); | |
58 | ||
59 | ||
60 | extern "C" void _init() | |
61 | { | |
62 | if (! mmi_register_instance_creator("iob", iob_create_instance) ) { | |
63 | fprintf(stderr, "Cannot register instance creator for iob\n"); | |
64 | } | |
65 | } // _init() | |
66 | ||
67 | ||
68 | ||
69 | void iob_create_instance (const char *modname, const char *instance_name) | |
70 | { | |
71 | sam_iob_s * iob_obj = new sam_iob_s; | |
72 | ||
73 | mmi_instance_t instance = mmi_register_instance(modname, instance_name, (void *) &iob_obj, "iob dummy device"); | |
74 | ||
75 | iob_obj->startpa = 0x0; | |
76 | iob_obj->endpa = 0x0; | |
77 | iob_obj->sz = 0; | |
78 | ||
79 | // expected syntax: sysconf iob iob1 startpa=<0xblah> endpa=<0xblah> | |
80 | int argc = mmi_argc(instance); | |
81 | int i; | |
82 | ||
83 | for (i=0; i<argc; i++) { | |
84 | char * arg = strdup(mmi_argv(instance, i)); | |
85 | char * marker; | |
86 | char * lv = strtok_r(arg, "=", &marker); | |
87 | if (strcmp(lv, "startpa") == 0) { | |
88 | errno = 0; | |
89 | char * rv = strtok_r(NULL, "=", &marker); | |
90 | iob_obj->startpa = strtoull(rv, NULL, 0); | |
91 | if (errno) { | |
92 | perror("iob: error parsing startpa"); | |
93 | exit(1); | |
94 | } | |
95 | } else if (strcmp(lv, "endpa") == 0) { | |
96 | errno = 0; | |
97 | char * rv = strtok_r(NULL, "=", &marker); | |
98 | iob_obj->endpa = strtoull(rv, NULL, 0); | |
99 | if (errno) { | |
100 | perror("iob: error parsing startpa"); | |
101 | exit(1); | |
102 | } | |
103 | } // else - do nothing | |
104 | } | |
105 | ||
106 | iob_obj->sz = iob_obj->endpa - iob_obj->startpa + 1; | |
107 | if (mmi_map_physio(iob_obj->startpa, iob_obj->sz, (void *) iob_obj, iob_access)) { | |
108 | fprintf(stderr, " sam iob: unable to register IO interceptor\n"); | |
109 | return; | |
110 | } | |
111 | } | |
112 | ||
113 | ||
114 | int iob_access(uint32_t cpuid, void* obj, uint64_t paddr, mmi_bool_t wr, uint32_t size, uint64_t* buf, uint8_t bytemask) | |
115 | { | |
116 | if (wr) { | |
117 | return iob_st_operation(obj, paddr, buf, size, cpuid); | |
118 | } else { | |
119 | return iob_ld_operation(obj, paddr, buf, size, cpuid); | |
120 | } | |
121 | } // iob_access() | |
122 | ||
123 | int iob_ld_operation (void *obj, uint64_t paddr, uint64_t *buf, int size, uint32_t cpuid) | |
124 | { | |
125 | sam_iob_s * iob_obj = (sam_iob_s *) obj; | |
126 | uint64_t offset = paddr - iob_obj->startpa; | |
127 | // fprintf(stderr, "SAM iob: ld_operation pa 0x%llx size %d cpu %d\n", paddr, size, cpuid); | |
128 | switch (offset) { | |
129 | case 0x0: | |
130 | *buf = 0; | |
131 | break; | |
132 | default: | |
133 | *buf = 0; | |
134 | break; | |
135 | // fprintf(stderr, "SAM iob: ld from invalid paddr 0x%llx\n", paddr); | |
136 | // exit(1); | |
137 | } | |
138 | return 0; | |
139 | } // int iob_ld_operation (void *cd, uint64_t paddr, uint64_t *buf, int size, uint32_t cpuid) | |
140 | ||
141 | ||
142 | int iob_st_operation (void *obj, uint64_t paddr, uint64_t *buf, int size, uint32_t cpuid) | |
143 | { | |
144 | // fprintf(stderr, "SAM iob: st_operation pa 0x%llx size %d cpu %d\n", paddr, size, cpuid); | |
145 | sam_iob_s * iob_obj = (sam_iob_s *) obj; | |
146 | uint64_t offset = paddr - iob_obj->startpa; | |
147 | switch (offset) { | |
148 | case 0x800: // case 0x9800000800: | |
149 | // do nothing | |
150 | break; | |
151 | case 0xa00: | |
152 | break; | |
153 | default: | |
154 | fprintf(stderr, "SAM iob: st to invalid paddr 0x%llx\n", paddr); | |
155 | exit(1); | |
156 | } | |
157 | return 0; | |
158 | } // int iob_st_operation (void *cd, uint64_t paddr, uint64_t *buf, int size, uint32_t cpuid) | |
159 | ||
160 | ||
161 | ///////////////////////////////////////////////// | |
162 | ||
163 | extern "C" void _fini () | |
164 | { | |
165 | } | |
166 | ||
167 | ///////////////////////////////////////////////// |