1 #-
2 # Copyright (c) 2009 Nathan Whitehorn
3 # All rights reserved.
4 #
5 # Redistribution and use in source and binary forms, with or without
6 # modification, are permitted provided that the following conditions
7 # are met:
8 # 1. Redistributions of source code must retain the above copyright
9 # notice, this list of conditions and the following disclaimer.
10 # 2. Redistributions in binary form must reproduce the above copyright
11 # notice, this list of conditions and the following disclaimer in the
12 # documentation and/or other materials provided with the distribution.
13 #
14 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 # ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 # SUCH DAMAGE.
25 #
26 # $FreeBSD$
27 #
28
29 #include <sys/param.h>
30 #include <sys/lock.h>
31 #include <sys/mutex.h>
32 #include <sys/systm.h>
33 #include <sys/smp.h>
34
35 #include <machine/ofw_machdep.h>
36 #include <machine/platform.h>
37 #include <machine/platformvar.h>
38 #include <machine/smp.h>
39 #include <machine/vmparam.h>
40
41 /**
42 * @defgroup PLATFORM platform - KObj methods for PowerPC platform
43 * implementations
44 * @brief A set of methods required by all platform implementations.
45 * These are used to bring up secondary CPUs, supply the physical memory
46 * map, etc.
47 *@{
48 */
49
50 INTERFACE platform;
51
52 #
53 # Default implementations
54 #
55 CODE {
56 static void platform_null_attach(platform_t plat)
57 {
58 return;
59 }
60 static int platform_null_smp_first_cpu(platform_t plat,
61 struct cpuref *cpuref)
62 {
63 cpuref->cr_hwref = -1;
64 cpuref->cr_cpuid = 0;
65 return (0);
66 }
67 static int platform_null_smp_next_cpu(platform_t plat,
68 struct cpuref *_cpuref)
69 {
70 return (ENOENT);
71 }
72 static struct cpu_group *platform_null_smp_topo(platform_t plat)
73 {
74 #ifdef SMP
75 return (smp_topo_none());
76 #else
77 return (NULL);
78 #endif
79 }
80 static vm_offset_t platform_null_real_maxaddr(platform_t plat)
81 {
82 return (VM_MAX_ADDRESS);
83 }
84 static void platform_null_smp_ap_init(platform_t plat)
85 {
86 return;
87 }
88 static void platform_null_smp_probe_threads(void)
89 {
90 return;
91 }
92 static int platform_null_node_numa_domain(platform_t plat,
93 phandle_t node)
94 {
95 return (0);
96 }
97 };
98
99 /**
100 * @brief Probe for whether we are on this platform, returning the standard
101 * newbus probe codes. If we have Open Firmware or a flattened device tree,
102 * it is guaranteed to be available at this point.
103 */
104 METHOD int probe {
105 platform_t _plat;
106 };
107
108
109 /**
110 * @brief Attach this platform module. This happens before the MMU is online,
111 * so the platform module can install its own high-priority MMU module at
112 * this point.
113 */
114 METHOD int attach {
115 platform_t _plat;
116 } DEFAULT platform_null_attach;
117
118
119 /**
120 * @brief Return the system's physical memory map.
121 *
122 * It shall provide the total and the available regions of RAM.
123 * The available regions need not take the kernel into account.
124 *
125 * @param _memp Array of physical memory chunks
126 * @param _memsz Number of physical memory chunks
127 * @param _availp Array of available physical memory chunks
128 * @param _availsz Number of available physical memory chunks
129 */
130
131 METHOD void mem_regions {
132 platform_t _plat;
133 struct mem_region *_memp;
134 int *_memsz;
135 struct mem_region *_availp;
136 int *_availsz;
137 };
138
139
140 /**
141 * @brief Return the system's physical memory map.
142 *
143 * It shall provide the total RAM with the corresponding domains.
144 *
145 * @param _memp Array of physical memory chunks
146 * @param _memsz Number of physical memory chunks
147 */
148
149 METHOD void numa_mem_regions {
150 platform_t _plat;
151 struct numa_mem_region *_memp;
152 int *_memsz;
153 };
154
155 /**
156 * @brief Return the maximum address accessible in real mode
157 * (for use with hypervisors)
158 */
159 METHOD vm_offset_t real_maxaddr {
160 platform_t _plat;
161 } DEFAULT platform_null_real_maxaddr;
162
163
164 /**
165 * @brief Get the CPU's timebase frequency, in ticks per second.
166 *
167 * @param _cpu CPU whose timebase to query
168 */
169
170 METHOD u_long timebase_freq {
171 platform_t _plat;
172 struct cpuref *_cpu;
173 };
174
175 # SMP bits
176
177 /**
178 * @brief Fill the first CPU's cpuref
179 *
180 * @param _cpuref CPU
181 */
182 METHOD int smp_first_cpu {
183 platform_t _plat;
184 struct cpuref *_cpuref;
185 } DEFAULT platform_null_smp_first_cpu;
186
187 /**
188 * @brief Fill the next CPU's cpuref
189 *
190 * @param _cpuref CPU
191 */
192 METHOD int smp_next_cpu {
193 platform_t _plat;
194 struct cpuref *_cpuref;
195 } DEFAULT platform_null_smp_next_cpu;
196
197 /**
198 * @brief Find the boot processor
199 *
200 * @param _cpuref CPU
201 */
202 METHOD int smp_get_bsp {
203 platform_t _plat;
204 struct cpuref *_cpuref;
205 } DEFAULT platform_null_smp_first_cpu;
206
207 /**
208 * @brief Start a CPU
209 *
210 * @param _cpuref CPU
211 */
212 METHOD int smp_start_cpu {
213 platform_t _plat;
214 struct pcpu *_cpu;
215 };
216
217 /**
218 * @brief Start a CPU
219 *
220 */
221 METHOD void smp_ap_init {
222 platform_t _plat;
223 } DEFAULT platform_null_smp_ap_init;
224
225 /**
226 * @brief Probe mp_ncores and smp_threads_per_core for early MI code
227 */
228 METHOD void smp_probe_threads {
229 platform_t _plat;
230 } DEFAULT platform_null_smp_probe_threads;
231
232 /**
233 * @brief Return SMP topology
234 */
235 METHOD cpu_group_t smp_topo {
236 platform_t _plat;
237 } DEFAULT platform_null_smp_topo;
238
239 /**
240 * @brief Reset system
241 */
242 METHOD void reset {
243 platform_t _plat;
244 };
245
246 /**
247 * @brief Suspend the CPU
248 */
249 METHOD void sleep {
250 platform_t _plat;
251 };
252
253 /**
254 * @brief Attempt to synchronize timebase of current CPU with others.
255 * Entered (approximately) simultaneously on all CPUs, including the BSP.
256 * Passed the timebase value on the BSP as of shortly before the call.
257 */
258 METHOD void smp_timebase_sync {
259 platform_t _plat;
260 u_long _tb;
261 int _ap;
262 };
263
264 /**
265 * @brief Return the NUMA domain for the given device tree node. Always returns
266 * a valid domain.
267 *
268 */
269 METHOD int node_numa_domain {
270 platform_t _plat;
271 phandle_t _node;
272 } DEFAULT platform_null_node_numa_domain;
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