2 # Copyright (c) 2009 Nathan Whitehorn
5 # Redistribution and use in source and binary forms, with or without
6 # modification, are permitted provided that the following conditions
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28 #include <sys/param.h>
30 #include <sys/mutex.h>
31 #include <sys/systm.h>
34 #include <machine/ofw_machdep.h>
35 #include <machine/platform.h>
36 #include <machine/platformvar.h>
37 #include <machine/smp.h>
38 #include <machine/vmparam.h>
41 * @defgroup PLATFORM platform - KObj methods for PowerPC platform
43 * @brief A set of methods required by all platform implementations.
44 * These are used to bring up secondary CPUs, supply the physical memory
52 # Default implementations
55 static void platform_null_attach(platform_t plat)
59 static int platform_null_smp_first_cpu(platform_t plat,
60 struct cpuref *cpuref)
62 cpuref->cr_hwref = -1;
66 static int platform_null_smp_next_cpu(platform_t plat,
67 struct cpuref *_cpuref)
71 static struct cpu_group *platform_null_smp_topo(platform_t plat)
74 return (smp_topo_none());
79 static vm_offset_t platform_null_real_maxaddr(platform_t plat)
81 return (VM_MAX_ADDRESS);
83 static void platform_null_smp_ap_init(platform_t plat)
87 static void platform_null_smp_probe_threads(void)
91 static int platform_null_node_numa_domain(platform_t plat,
99 * @brief Probe for whether we are on this platform, returning the standard
100 * newbus probe codes. If we have Open Firmware or a flattened device tree,
101 * it is guaranteed to be available at this point.
109 * @brief Attach this platform module. This happens before the MMU is online,
110 * so the platform module can install its own high-priority MMU module at
115 } DEFAULT platform_null_attach;
119 * @brief Return the system's physical memory map.
121 * It shall provide the total and the available regions of RAM.
122 * The available regions need not take the kernel into account.
124 * @param _memp Array of physical memory chunks
125 * @param _memsz Number of physical memory chunks
126 * @param _availp Array of available physical memory chunks
127 * @param _availsz Number of available physical memory chunks
130 METHOD void mem_regions {
132 struct mem_region *_memp;
134 struct mem_region *_availp;
140 * @brief Return the system's physical memory map.
142 * It shall provide the total RAM with the corresponding domains.
144 * @param _memp Array of physical memory chunks
145 * @param _memsz Number of physical memory chunks
148 METHOD void numa_mem_regions {
150 struct numa_mem_region *_memp;
155 * @brief Return the maximum address accessible in real mode
156 * (for use with hypervisors)
158 METHOD vm_offset_t real_maxaddr {
160 } DEFAULT platform_null_real_maxaddr;
164 * @brief Get the CPU's timebase frequency, in ticks per second.
166 * @param _cpu CPU whose timebase to query
169 METHOD u_long timebase_freq {
177 * @brief Fill the first CPU's cpuref
181 METHOD int smp_first_cpu {
183 struct cpuref *_cpuref;
184 } DEFAULT platform_null_smp_first_cpu;
187 * @brief Fill the next CPU's cpuref
191 METHOD int smp_next_cpu {
193 struct cpuref *_cpuref;
194 } DEFAULT platform_null_smp_next_cpu;
197 * @brief Find the boot processor
201 METHOD int smp_get_bsp {
203 struct cpuref *_cpuref;
204 } DEFAULT platform_null_smp_first_cpu;
211 METHOD int smp_start_cpu {
220 METHOD void smp_ap_init {
222 } DEFAULT platform_null_smp_ap_init;
225 * @brief Probe mp_ncores and smp_threads_per_core for early MI code
227 METHOD void smp_probe_threads {
229 } DEFAULT platform_null_smp_probe_threads;
232 * @brief Return SMP topology
234 METHOD cpu_group_t smp_topo {
236 } DEFAULT platform_null_smp_topo;
239 * @brief Reset system
246 * @brief Suspend the CPU
253 * @brief Attempt to synchronize timebase of current CPU with others.
254 * Entered (approximately) simultaneously on all CPUs, including the BSP.
255 * Passed the timebase value on the BSP as of shortly before the call.
257 METHOD void smp_timebase_sync {
264 * @brief Return the NUMA domain for the given device tree node. Always returns
268 METHOD int node_numa_domain {
271 } DEFAULT platform_null_node_numa_domain;