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1 | // ========== Copyright Header Begin ========================================== |
2 | // | |
3 | // OpenSPARC T2 Processor File: l2csr.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 | /* l2csr.C | |
22 | * handle L2CSR (I/O space) T1 addresses for blaze/SAM | |
23 | * | |
24 | * Copyright (c) 2004-2005 by Sun Microsystems, Inc. | |
25 | * All rights reserved. | |
26 | * | |
27 | */ | |
28 | ||
29 | #include <stdio.h> | |
30 | #include <stdlib.h> | |
31 | #include <string.h> | |
32 | #include <errno.h> | |
33 | #include <sys/syscall.h> // get exec number | |
34 | #include <sys/types.h> // uid_t | |
35 | #include <unistd.h> // getuid() | |
36 | #include <inttypes.h> | |
37 | #include <stdarg.h> | |
38 | ||
39 | #include <thread.h> | |
40 | ||
41 | #include "mmi.h" | |
42 | #include "ui.h" | |
43 | ||
44 | struct sam_l2csr_s { | |
45 | uint64_t startpa; | |
46 | uint64_t endpa; | |
47 | uint64_t sz; | |
48 | }; // struct sam_l2csr.C | |
49 | ||
50 | ||
51 | extern "C" { | |
52 | void _init (); // predeclare these to have C naming | |
53 | void _fini (); // predeclare these to have C naming | |
54 | ||
55 | int l2csr_access(uint32_t cpuid, void* obj, uint64_t paddr, mmi_bool_t wr, uint32_t size, uint64_t* buf, uint8_t bytemask); | |
56 | ||
57 | int l2csr_ld_operation (void *cd, uint64_t paddr, uint64_t *buf, int sz, uint32_t cpuid); | |
58 | int l2csr_st_operation (void *cd, uint64_t paddr, uint64_t *buf, int sz, uint32_t cpuid); | |
59 | } | |
60 | ||
61 | extern "C" void l2csr_create_instance (const char *modname, const char *instance_name); | |
62 | ||
63 | extern "C" void _init() | |
64 | { | |
65 | if (! mmi_register_instance_creator("l2csr", l2csr_create_instance) ) { | |
66 | fprintf(stderr, "Cannot register instance creator for l2csr\n"); | |
67 | } | |
68 | } // _init() | |
69 | ||
70 | ||
71 | ||
72 | void l2csr_create_instance (const char *modname, const char *instance_name) | |
73 | { | |
74 | sam_l2csr_s * l2csr_obj = new sam_l2csr_s; | |
75 | ||
76 | mmi_instance_t instance = mmi_register_instance(modname, instance_name, (void *) &l2csr_obj, "l2csr dummy device"); | |
77 | ||
78 | l2csr_obj->startpa = 0x0; | |
79 | l2csr_obj->endpa = 0x0; | |
80 | l2csr_obj->sz = 0; | |
81 | ||
82 | // expected syntax: sysconf l2csr l2csr1 startpa=<0xblah> endpa=<0xblah> | |
83 | int argc = mmi_argc(instance); | |
84 | int i; | |
85 | ||
86 | for (i=0; i<argc; i++) { | |
87 | char * arg = strdup(mmi_argv(instance, i)); | |
88 | char * marker; | |
89 | char * lv = strtok_r(arg, "=", &marker); | |
90 | if (strcmp(lv, "startpa") == 0) { | |
91 | errno = 0; | |
92 | char * rv = strtok_r(NULL, "=", &marker); | |
93 | l2csr_obj->startpa = strtoull(rv, NULL, 0); | |
94 | if (errno) { | |
95 | perror("l2csr: error parsing startpa"); | |
96 | exit(1); | |
97 | } | |
98 | } else if (strcmp(lv, "endpa") == 0) { | |
99 | errno = 0; | |
100 | char * rv = strtok_r(NULL, "=", &marker); | |
101 | l2csr_obj->endpa = strtoull(rv, NULL, 0); | |
102 | if (errno) { | |
103 | perror("l2csr: error parsing startpa"); | |
104 | exit(1); | |
105 | } | |
106 | } // else - do nothing | |
107 | } | |
108 | ||
109 | l2csr_obj->sz = l2csr_obj->endpa - l2csr_obj->startpa + 1; | |
110 | if (mmi_map_physio(l2csr_obj->startpa, l2csr_obj->sz, (void *) l2csr_obj, l2csr_access)) { | |
111 | fprintf(stderr, " sam l2csr (%s): unable to register IO interceptor @PA=0x%llx size=0x%llx\n", instance_name, l2csr_obj->startpa, l2csr_obj->sz); | |
112 | return; | |
113 | } | |
114 | } | |
115 | ||
116 | ||
117 | int l2csr_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 l2csr_st_operation(obj, paddr, buf, size, cpuid); | |
121 | } else { | |
122 | return l2csr_ld_operation(obj, paddr, buf, size, cpuid); | |
123 | } | |
124 | } // l2csr_access() | |
125 | ||
126 | int l2csr_ld_operation (void *obj, uint64_t paddr, uint64_t *buf, int size, uint32_t cpuid) | |
127 | { | |
128 | sam_l2csr_s * l2csr_obj = (sam_l2csr_s *) obj; | |
129 | uint64_t offset = paddr - l2csr_obj->startpa; | |
130 | // fprintf(stderr, "SAM l2csr: ld_operation pa 0x%llx size %d cpu %d\n", paddr, size, cpuid); | |
131 | switch (offset) { | |
132 | case 0x0: | |
133 | case 0x40: | |
134 | case 0x80: | |
135 | case 0xc0: | |
136 | *buf = 0; | |
137 | break; | |
138 | default: | |
139 | *buf = 0; | |
140 | break; | |
141 | // fprintf(stderr, "SAM l2csr: ld from invalid paddr 0x%llx\n", paddr); | |
142 | // exit(1); | |
143 | } | |
144 | return 0; | |
145 | } // int l2csr_ld_operation (void *cd, uint64_t paddr, uint64_t *buf, int size, uint32_t cpuid) | |
146 | ||
147 | ||
148 | int l2csr_st_operation (void *obj, uint64_t paddr, uint64_t *buf, int size, uint32_t cpuid) | |
149 | { | |
150 | // fprintf(stderr, "SAM l2csr: st_operation pa 0x%llx size %d cpu %d\n", paddr, size, cpuid); | |
151 | sam_l2csr_s * l2csr_obj = (sam_l2csr_s *) obj; | |
152 | uint64_t offset = paddr - l2csr_obj->startpa; | |
153 | switch (offset) { | |
154 | case 0x00: | |
155 | case 0x40: | |
156 | case 0x80: | |
157 | case 0xc0: | |
158 | // do nothing | |
159 | break; | |
160 | default: | |
161 | break; | |
162 | // fprintf(stderr, "SAM l2csr: st to invalid paddr 0x%llx\n", paddr); | |
163 | // exit(1); | |
164 | } | |
165 | return 0; | |
166 | } // int l2csr_st_operation (void *cd, uint64_t paddr, uint64_t *buf, int size, uint32_t cpuid) | |
167 | ||
168 | ||
169 | ///////////////////////////////////////////////// | |
170 | ||
171 | extern "C" void _fini () | |
172 | { | |
173 | } | |
174 | ||
175 | ///////////////////////////////////////////////// |