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1 | // ========== Copyright Header Begin ========================================== |
2 | // | |
3 | // OpenSPARC T2 Processor File: char.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 | /* char.cc | |
22 | * fake char output device for blaze/SAM | |
23 | * | |
24 | * | |
25 | * Copyright (c) 2004 by Sun Microsystems, Inc. | |
26 | * All rights reserved. | |
27 | * | |
28 | */ | |
29 | ||
30 | ||
31 | #include <stdio.h> | |
32 | #include <stdlib.h> | |
33 | #include <string.h> | |
34 | #include <errno.h> | |
35 | #include <sys/syscall.h> // get exec number | |
36 | #include <sys/types.h> // uid_t | |
37 | #include <unistd.h> // getuid() | |
38 | #include <inttypes.h> | |
39 | #include <stdarg.h> | |
40 | ||
41 | #include <thread.h> | |
42 | ||
43 | #include "mmi.h" | |
44 | #include "ui.h" | |
45 | ||
46 | struct sam_char_s | |
47 | { | |
48 | uint64_t startpa; | |
49 | uint64_t endpa; | |
50 | uint64_t sz; | |
51 | }; | |
52 | ||
53 | ||
54 | extern "C" int char_access(uint32_t cpuid, void* obj, uint64_t paddr, mmi_bool_t wr, uint32_t size, uint64_t* buf, uint8_t bytemask); | |
55 | ||
56 | int char_ld_operation (void *cd, uint64_t paddr, uint64_t *buf, int sz, uint32_t cpuid); | |
57 | int char_st_operation (void *cd, uint64_t paddr, uint64_t *buf, int sz, uint32_t cpuid); | |
58 | ||
59 | extern "C" void char_create_instance (const char *modname, const char *instance_name); | |
60 | ||
61 | ||
62 | extern "C" void _init() | |
63 | { | |
64 | if (! mmi_register_instance_creator("char", char_create_instance) ) { | |
65 | fprintf(stderr, "Cannot register instance creator for char\n"); | |
66 | } | |
67 | } // _init() | |
68 | ||
69 | ||
70 | ||
71 | void char_create_instance (const char *modname, const char *instance_name) | |
72 | { | |
73 | sam_char_s * char_obj = new sam_char_s; | |
74 | ||
75 | mmi_instance_t instance = mmi_register_instance(modname, instance_name, (void *) &char_obj, "char dummy device"); | |
76 | ||
77 | char_obj->startpa = 0x0; | |
78 | char_obj->endpa = 0x0; | |
79 | char_obj->sz = 0; | |
80 | ||
81 | // expected syntax: sysconf char char1 startpa=<0xblah> endpa=<0xblah> | |
82 | int argc = mmi_argc(instance); | |
83 | int i; | |
84 | ||
85 | for (i=0; i<argc; i++) { | |
86 | char * arg = strdup(mmi_argv(instance, i)); | |
87 | char * marker; | |
88 | char * lv = strtok_r(arg, "=", &marker); | |
89 | if (strcmp(lv, "startpa") == 0) { | |
90 | errno = 0; | |
91 | char * rv = strtok_r(NULL, "=", &marker); | |
92 | char_obj->startpa = strtoull(rv, NULL, 0); | |
93 | if (errno) { | |
94 | perror("char: error parsing startpa"); | |
95 | exit(1); | |
96 | } | |
97 | } else if (strcmp(lv, "endpa") == 0) { | |
98 | errno = 0; | |
99 | char * rv = strtok_r(NULL, "=", &marker); | |
100 | char_obj->endpa = strtoull(rv, NULL, 0); | |
101 | if (errno) { | |
102 | perror("char: error parsing startpa"); | |
103 | exit(1); | |
104 | } | |
105 | } // else - do nothing | |
106 | } | |
107 | ||
108 | char_obj->sz = char_obj->endpa - char_obj->startpa + 1; | |
109 | ||
110 | if (mmi_map_physio(char_obj->startpa, char_obj->sz, (void *) char_obj, char_access)) { | |
111 | fprintf(stderr, " sam char: unable to register IO interceptor\n"); | |
112 | return; | |
113 | } | |
114 | } | |
115 | ||
116 | ||
117 | int char_access(uint32_t cpuid, void* obj, uint64_t paddr, mmi_bool_t wr, uint32_t size, uint64_t* buf, uint8_t bytemask) | |
118 | { | |
119 | if (wr) { | |
120 | return char_st_operation(obj, paddr, buf, size, cpuid); | |
121 | } else { | |
122 | return char_ld_operation(obj, paddr, buf, size, cpuid); | |
123 | } | |
124 | } // char_access() | |
125 | ||
126 | int char_ld_operation (void *obj, uint64_t paddr, uint64_t *buf, int size, uint32_t cpuid) | |
127 | { | |
128 | ||
129 | fprintf(stderr, "SAM char: ld_operation pa 0x%llx size %d cpu %d, ignored\n", | |
130 | paddr, size, cpuid); | |
131 | *buf = 0; | |
132 | ||
133 | return 0; | |
134 | } // int char_ld_operation (void *cd, uint64_t paddr, uint64_t *buf, int size, uint32_t cpuid) | |
135 | ||
136 | ||
137 | int char_st_operation (void *obj, uint64_t paddr, uint64_t *buf, int size, uint32_t cpuid) | |
138 | { | |
139 | ||
140 | // output chars to the consol | |
141 | char *c = (char*)buf; | |
142 | for ( int i = size; i && (*c); i--, c++) | |
143 | *c == 0 ? putchar('\n') : putchar (*c); | |
144 | return 0; | |
145 | ||
146 | } // int char_st_operation (void *cd, uint64_t paddr, uint64_t *buf, int size, uint32_t cpuid) | |
147 | ||
148 | ||
149 | ///////////////////////////////////////////////// | |
150 | ||
151 | extern "C" void _fini () | |
152 | { | |
153 | } | |
154 | ||
155 | ///////////////////////////////////////////////// |