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1 | /* |
2 | * ========== Copyright Header Begin ========================================== | |
3 | * | |
4 | * OpenSPARC T2 Processor File: tso_n1_mutex1.s | |
5 | * Copyright (C) 1995-2007 Sun Microsystems, Inc. All Rights Reserved | |
6 | * 4150 Network Circle, Santa Clara, California 95054, U.S.A. | |
7 | * | |
8 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; version 2 of the License. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
22 | * | |
23 | * For the avoidance of doubt, and except that if any non-GPL license | |
24 | * choice is available it will apply instead, Sun elects to use only | |
25 | * the General Public License version 2 (GPLv2) at this time for any | |
26 | * software where a choice of GPL license versions is made | |
27 | * available with the language indicating that GPLv2 or any later version | |
28 | * may be used, or where a choice of which version of the GPL is applied is | |
29 | * otherwise unspecified. | |
30 | * | |
31 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
32 | * CA 95054 USA or visit www.sun.com if you need additional information or | |
33 | * have any questions. | |
34 | * | |
35 | * | |
36 | * ========== Copyright Header End ============================================ | |
37 | */ | |
38 | #define spinlock_addr_reg %o0 | |
39 | #define data_base_reg %o1 | |
40 | #define to_reg %o2 | |
41 | #define my_id_reg %o3 | |
42 | #define test_reg %o4 | |
43 | #define global_cnt_reg %o5 | |
44 | ||
45 | #define TIMEOUT 0x1000 | |
46 | #define ITERATIONS 0x2 | |
47 | ||
48 | #include "hboot.s" | |
49 | ||
50 | .global main | |
51 | main: | |
52 | ||
53 | setx spinlock_address, %l0, spinlock_addr_reg ! spinlock address | |
54 | set TIMEOUT, to_reg ! set timeout count | |
55 | set ITERATIONS, global_cnt_reg ! | |
56 | ||
57 | or spinlock_addr_reg, %g0, my_id_reg | |
58 | ||
59 | th_fork(th_main,%l0) | |
60 | ||
61 | th_main_0: | |
62 | add my_id_reg, 0x20, my_id_reg ! my ID address | |
63 | stb %g0, [my_id_reg] ! reset the value | |
64 | ba getlock | |
65 | nop | |
66 | ||
67 | th_main_1: | |
68 | add my_id_reg, 0x24, my_id_reg | |
69 | stb %g0, [my_id_reg] | |
70 | ba getlock | |
71 | nop | |
72 | ||
73 | ||
74 | th_main_2: | |
75 | add my_id_reg, 0x28, my_id_reg | |
76 | stb %g0, [my_id_reg] | |
77 | ba getlock | |
78 | nop | |
79 | ||
80 | th_main_3: | |
81 | add my_id_reg, 0x2c, my_id_reg | |
82 | stb %g0, [my_id_reg] | |
83 | ba getlock | |
84 | nop | |
85 | ||
86 | th_main_4: | |
87 | add my_id_reg, 0x30, my_id_reg | |
88 | stb %g0, [my_id_reg] | |
89 | ba getlock | |
90 | nop | |
91 | ||
92 | th_main_5: | |
93 | add my_id_reg, 0x34, my_id_reg | |
94 | stb %g0, [my_id_reg] | |
95 | ba getlock | |
96 | nop | |
97 | ||
98 | th_main_6: | |
99 | add my_id_reg, 0x38, my_id_reg | |
100 | stb %g0, [my_id_reg] | |
101 | ba getlock | |
102 | nop | |
103 | ||
104 | th_main_7: | |
105 | add my_id_reg, 0x3c, my_id_reg | |
106 | stb %g0, [my_id_reg] | |
107 | ba getlock | |
108 | nop | |
109 | ||
110 | getlock: | |
111 | or %g0, my_id_reg, test_reg ! load the swap data register | |
112 | swap [spinlock_addr_reg], test_reg ! try to acquire lock | |
113 | tst test_reg ! did we get it? | |
114 | be gotlock | |
115 | nop | |
116 | ||
117 | dotimeout: | |
118 | deccc to_reg ! dec timeout count | |
119 | bne getlock ! branch if no timeout | |
120 | nop | |
121 | ba,a bad_end | |
122 | nop | |
123 | ||
124 | gotlock: | |
125 | set TIMEOUT, to_reg ! set timeout count again | |
126 | setx protected_area, %l0, data_base_reg | |
127 | ||
128 | set 100, %l0 | |
129 | add my_id_reg, data_base_reg, %i1 | |
130 | loop1: | |
131 | st %i1, [data_base_reg] ! st my ID in the protected area | |
132 | add data_base_reg, 4, data_base_reg ! increment the address | |
133 | add %i1, 1, %i1 | |
134 | deccc %l0 | |
135 | bne loop1 ! repeat | |
136 | nop | |
137 | ||
138 | set 100, %l0 | |
139 | loop2: | |
140 | sub data_base_reg, 4, data_base_reg | |
141 | sub %i1, 1, %i1 | |
142 | ld [data_base_reg], %l1 ! read the data area | |
143 | subcc %l1, %i1, %l1 ! should be same is i1 | |
144 | bne bad_end | |
145 | nop | |
146 | deccc %l0 ! repeat | |
147 | bne loop2 | |
148 | nop | |
149 | ||
150 | clearlock: | |
151 | st %g0, [spinlock_addr_reg] ! unlocked | |
152 | ||
153 | check_done: | |
154 | deccc global_cnt_reg | |
155 | be good_end | |
156 | nop | |
157 | ba getlock | |
158 | nop | |
159 | ||
160 | good_end: | |
161 | ta T_GOOD_TRAP | |
162 | bad_end: | |
163 | ta T_BAD_TRAP | |
164 | ||
165 | !========================== | |
166 | ||
167 | ||
168 | SECTION .MY_DATA0 TEXT_VA=0xf0100000, DATA_VA=0xd0100000 | |
169 | attr_data { | |
170 | Name = .MY_DATA0, | |
171 | VA= 0x0d0100000 | |
172 | RA= 0x1d0100000 | |
173 | PA= ra2pa(0x1d0100000,0), | |
174 | part_0_ctx_nonzero_tsb_config_0, | |
175 | TTE_G=1, TTE_Context=0x44, TTE_V=1, TTE_Size=0, TTE_NFO=0, | |
176 | TTE_IE=0, TTE_Soft2=0, TTE_Diag=0, TTE_Soft=0, | |
177 | TTE_L=0, TTE_CP=1, TTE_CV=1, TTE_E=0, TTE_P=0, TTE_W=1 | |
178 | } | |
179 | ||
180 | attr_text { | |
181 | Name = .MY_DATA0, | |
182 | VA= 0x0f0100000 | |
183 | RA= 0x1f0100000 | |
184 | PA= ra2pa(0x1f0100000,0), | |
185 | part_0_ctx_nonzero_tsb_config_0, | |
186 | TTE_G=1, TTE_Context=0x44, TTE_V=1, TTE_Size=0, TTE_NFO=0, | |
187 | TTE_IE=0, TTE_Soft2=0, TTE_Diag=0, TTE_Soft=0, | |
188 | TTE_L=0, TTE_CP=1, TTE_CV=1, TTE_E=0, TTE_P=0, TTE_W=1 | |
189 | } | |
190 | ||
191 | .data | |
192 | ||
193 | .global spinlock_address | |
194 | spinlock_address: | |
195 | .word 0x0 | |
196 | .skip 0x1000 | |
197 | .word 0x0 | |
198 | ||
199 | SECTION .MY_DATA1 TEXT_VA=0xf1110000, DATA_VA=0xd1110000 | |
200 | attr_data { | |
201 | Name = .MY_DATA1, | |
202 | VA= 0x0d1110000, | |
203 | RA= 0x1d1110000, | |
204 | PA= ra2pa(0x1d1110000,0), | |
205 | part_0_ctx_nonzero_tsb_config_0, | |
206 | TTE_G=1, TTE_Context=0x44, TTE_V=1, TTE_Size=0, TTE_NFO=0, | |
207 | TTE_IE=0, TTE_Soft2=0, TTE_Diag=0, TTE_Soft=0, | |
208 | TTE_L=0, TTE_CP=1, TTE_CV=1, TTE_E=0, TTE_P=0, TTE_W=1 | |
209 | } | |
210 | ||
211 | attr_text { | |
212 | Name = .MY_DATA1, | |
213 | VA= 0x0f1110000, | |
214 | RA= 0x1f1110000, | |
215 | PA= ra2pa(0x1f1110000,0), | |
216 | part_0_ctx_nonzero_tsb_config_0, | |
217 | TTE_G=1, TTE_Context=0x44, TTE_V=1, TTE_Size=0, TTE_NFO=0, | |
218 | TTE_IE=0, TTE_Soft2=0, TTE_Diag=0, TTE_Soft=0, | |
219 | TTE_L=0, TTE_CP=1, TTE_CV=1, TTE_E=0, TTE_P=0, TTE_W=1 | |
220 | } | |
221 | ||
222 | .data | |
223 | .global protected_area | |
224 | protected_area: | |
225 | .word 0xbeef | |
226 | .skip 0x1000 | |
227 | .word 0xbeef | |
228 | ||
229 | ! now do some post-procesing | |
230 | .end | |
231 |