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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11 # notice, this list of conditions and the following disclaimer in the
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29 #include <sys/param.h>
31 #include <sys/mutex.h>
32 #include <sys/systm.h>
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>
42 * @defgroup PLATFORM platform - KObj methods for PowerPC platform
44 * @brief A set of methods required by all platform implementations.
45 * These are used to bring up secondary CPUs, supply the physical memory
53 # Default implementations
56 static void platform_null_attach(platform_t plat)
60 static int platform_null_smp_first_cpu(platform_t plat,
61 struct cpuref *cpuref)
63 cpuref->cr_hwref = -1;
67 static int platform_null_smp_next_cpu(platform_t plat,
68 struct cpuref *_cpuref)
72 static struct cpu_group *platform_null_smp_topo(platform_t plat)
75 return (smp_topo_none());
80 static vm_offset_t platform_null_real_maxaddr(platform_t plat)
82 return (VM_MAX_ADDRESS);
84 static void platform_null_smp_ap_init(platform_t plat)
88 static void platform_null_smp_probe_threads(void)
92 static int platform_null_node_numa_domain(platform_t plat,
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.
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
116 } DEFAULT platform_null_attach;
120 * @brief Return the system's physical memory map.
122 * It shall provide the total and the available regions of RAM.
123 * The available regions need not take the kernel into account.
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
131 METHOD void mem_regions {
133 struct mem_region *_memp;
135 struct mem_region *_availp;
141 * @brief Return the system's physical memory map.
143 * It shall provide the total RAM with the corresponding domains.
145 * @param _memp Array of physical memory chunks
146 * @param _memsz Number of physical memory chunks
149 METHOD void numa_mem_regions {
151 struct numa_mem_region *_memp;
156 * @brief Return the maximum address accessible in real mode
157 * (for use with hypervisors)
159 METHOD vm_offset_t real_maxaddr {
161 } DEFAULT platform_null_real_maxaddr;
165 * @brief Get the CPU's timebase frequency, in ticks per second.
167 * @param _cpu CPU whose timebase to query
170 METHOD u_long timebase_freq {
178 * @brief Fill the first CPU's cpuref
182 METHOD int smp_first_cpu {
184 struct cpuref *_cpuref;
185 } DEFAULT platform_null_smp_first_cpu;
188 * @brief Fill the next CPU's cpuref
192 METHOD int smp_next_cpu {
194 struct cpuref *_cpuref;
195 } DEFAULT platform_null_smp_next_cpu;
198 * @brief Find the boot processor
202 METHOD int smp_get_bsp {
204 struct cpuref *_cpuref;
205 } DEFAULT platform_null_smp_first_cpu;
212 METHOD int smp_start_cpu {
221 METHOD void smp_ap_init {
223 } DEFAULT platform_null_smp_ap_init;
226 * @brief Probe mp_ncores and smp_threads_per_core for early MI code
228 METHOD void smp_probe_threads {
230 } DEFAULT platform_null_smp_probe_threads;
233 * @brief Return SMP topology
235 METHOD cpu_group_t smp_topo {
237 } DEFAULT platform_null_smp_topo;
240 * @brief Reset system
247 * @brief Suspend the CPU
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.
258 METHOD void smp_timebase_sync {
265 * @brief Return the NUMA domain for the given device tree node. Always returns
269 METHOD int node_numa_domain {
272 } DEFAULT platform_null_node_numa_domain;