1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 #ifndef _ASM_POWERPC_MACHDEP_H
3 #define _ASM_POWERPC_MACHDEP_H
4 #ifdef __KERNEL__
5
6 #include <linux/seq_file.h>
7 #include <linux/init.h>
8 #include <linux/dma-mapping.h>
9 #include <linux/export.h>
10
11 #include <asm/setup.h>
12
13 /* We export this macro for external modules like Alsa to know if
14 * ppc_md.feature_call is implemented or not
15 */
16 #define CONFIG_PPC_HAS_FEATURE_CALLS
17
18 struct pt_regs;
19 struct pci_bus;
20 struct device_node;
21 struct iommu_table;
22 struct rtc_time;
23 struct file;
24 struct pci_controller;
25 struct kimage;
26 struct pci_host_bridge;
27
28 struct machdep_calls {
29 char *name;
30 #ifdef CONFIG_PPC64
31 #ifdef CONFIG_PM
32 void (*iommu_save)(void);
33 void (*iommu_restore)(void);
34 #endif
35 #ifdef CONFIG_MEMORY_HOTPLUG_SPARSE
36 unsigned long (*memory_block_size)(void);
37 #endif
38 #endif /* CONFIG_PPC64 */
39
40 void (*dma_set_mask)(struct device *dev, u64 dma_mask);
41
42 int (*probe)(void);
43 void (*setup_arch)(void); /* Optional, may be NULL */
44 /* Optional, may be NULL. */
45 void (*show_cpuinfo)(struct seq_file *m);
46 void (*show_percpuinfo)(struct seq_file *m, int i);
47 /* Returns the current operating frequency of "cpu" in Hz */
48 unsigned long (*get_proc_freq)(unsigned int cpu);
49
50 void (*init_IRQ)(void);
51
52 /* Return an irq, or 0 to indicate there are none pending. */
53 unsigned int (*get_irq)(void);
54
55 /* PCI stuff */
56 /* Called after allocating resources */
57 void (*pcibios_fixup)(void);
58 void (*pci_irq_fixup)(struct pci_dev *dev);
59 int (*pcibios_root_bridge_prepare)(struct pci_host_bridge
60 *bridge);
61
62 /* To setup PHBs when using automatic OF platform driver for PCI */
63 int (*pci_setup_phb)(struct pci_controller *host);
64
65 void __noreturn (*restart)(char *cmd);
66 void __noreturn (*halt)(void);
67 void (*panic)(char *str);
68
69 long (*time_init)(void); /* Optional, may be NULL */
70
71 int (*set_rtc_time)(struct rtc_time *);
72 void (*get_rtc_time)(struct rtc_time *);
73 time64_t (*get_boot_time)(void);
74 unsigned char (*rtc_read_val)(int addr);
75 void (*rtc_write_val)(int addr, unsigned char val);
76
77 void (*calibrate_decr)(void);
78
79 void (*progress)(char *, unsigned short);
80
81 /* Interface for platform error logging */
82 void (*log_error)(char *buf, unsigned int err_type, int fatal);
83
84 unsigned char (*nvram_read_val)(int addr);
85 void (*nvram_write_val)(int addr, unsigned char val);
86 ssize_t (*nvram_write)(char *buf, size_t count, loff_t *index);
87 ssize_t (*nvram_read)(char *buf, size_t count, loff_t *index);
88 ssize_t (*nvram_size)(void);
89 void (*nvram_sync)(void);
90
91 /* Exception handlers */
92 int (*system_reset_exception)(struct pt_regs *regs);
93 int (*machine_check_exception)(struct pt_regs *regs);
94 int (*handle_hmi_exception)(struct pt_regs *regs);
95
96 /* Early exception handlers called in realmode */
97 int (*hmi_exception_early)(struct pt_regs *regs);
98 long (*machine_check_early)(struct pt_regs *regs);
99
100 /* Called during machine check exception to retrive fixup address. */
101 bool (*mce_check_early_recovery)(struct pt_regs *regs);
102
103 /* Motherboard/chipset features. This is a kind of general purpose
104 * hook used to control some machine specific features (like reset
105 * lines, chip power control, etc...).
106 */
107 long (*feature_call)(unsigned int feature, ...);
108
109 /* Get legacy PCI/IDE interrupt mapping */
110 int (*pci_get_legacy_ide_irq)(struct pci_dev *dev, int channel);
111
112 /* Get access protection for /dev/mem */
113 pgprot_t (*phys_mem_access_prot)(struct file *file,
114 unsigned long pfn,
115 unsigned long size,
116 pgprot_t vma_prot);
117
118 /*
119 * Function for waiting for work with reduced power in idle loop;
120 * called with interrupts disabled.
121 */
122 void (*power_save)(void);
123
124 /* Function to enable performance monitor counters for this
125 platform, called once per cpu. */
126 void (*enable_pmcs)(void);
127
128 /* Set DABR for this platform, leave empty for default implementation */
129 int (*set_dabr)(unsigned long dabr,
130 unsigned long dabrx);
131
132 /* Set DAWR for this platform, leave empty for default implementation */
133 int (*set_dawr)(int nr, unsigned long dawr,
134 unsigned long dawrx);
135
136 #ifdef CONFIG_PPC32 /* XXX for now */
137 /* A general init function, called by ppc_init in init/main.c.
138 May be NULL. */
139 void (*init)(void);
140
141 void (*kgdb_map_scc)(void);
142
143 /*
144 * optional PCI "hooks"
145 */
146 /* Called at then very end of pcibios_init() */
147 void (*pcibios_after_init)(void);
148
149 #endif /* CONFIG_PPC32 */
150
151 /* Called in indirect_* to avoid touching devices */
152 int (*pci_exclude_device)(struct pci_controller *, unsigned char, unsigned char);
153
154 /* Called after PPC generic resource fixup to perform
155 machine specific fixups */
156 void (*pcibios_fixup_resources)(struct pci_dev *);
157
158 /* Called for each PCI bus in the system when it's probed */
159 void (*pcibios_fixup_bus)(struct pci_bus *);
160
161 /* Called after scan and before resource survey */
162 void (*pcibios_fixup_phb)(struct pci_controller *hose);
163
164 /*
165 * Called after device has been added to bus and
166 * before sysfs has been created.
167 */
168 void (*pcibios_bus_add_device)(struct pci_dev *pdev);
169
170 resource_size_t (*pcibios_default_alignment)(void);
171
172 #ifdef CONFIG_PCI_IOV
173 void (*pcibios_fixup_sriov)(struct pci_dev *pdev);
174 resource_size_t (*pcibios_iov_resource_alignment)(struct pci_dev *, int resno);
175 int (*pcibios_sriov_enable)(struct pci_dev *pdev, u16 num_vfs);
176 int (*pcibios_sriov_disable)(struct pci_dev *pdev);
177 #endif /* CONFIG_PCI_IOV */
178
179 /* Called to shutdown machine specific hardware not already controlled
180 * by other drivers.
181 */
182 void (*machine_shutdown)(void);
183
184 #ifdef CONFIG_KEXEC_CORE
185 void (*kexec_cpu_down)(int crash_shutdown, int secondary);
186
187 /* Called to do what every setup is needed on image and the
188 * reboot code buffer. Returns 0 on success.
189 * Provide your own (maybe dummy) implementation if your platform
190 * claims to support kexec.
191 */
192 int (*machine_kexec_prepare)(struct kimage *image);
193
194 /* Called to perform the _real_ kexec.
195 * Do NOT allocate memory or fail here. We are past the point of
196 * no return.
197 */
198 void (*machine_kexec)(struct kimage *image);
199 #endif /* CONFIG_KEXEC_CORE */
200
201 #ifdef CONFIG_SUSPEND
202 /* These are called to disable and enable, respectively, IRQs when
203 * entering a suspend state. If NULL, then the generic versions
204 * will be called. The generic versions disable/enable the
205 * decrementer along with interrupts.
206 */
207 void (*suspend_disable_irqs)(void);
208 void (*suspend_enable_irqs)(void);
209 #endif
210 int (*suspend_disable_cpu)(void);
211
212 #ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
213 ssize_t (*cpu_probe)(const char *, size_t);
214 ssize_t (*cpu_release)(const char *, size_t);
215 #endif
216
217 #ifdef CONFIG_ARCH_RANDOM
218 int (*get_random_seed)(unsigned long *v);
219 #endif
220 };
221
222 extern void e500_idle(void);
223 extern void power4_idle(void);
224 extern void ppc6xx_idle(void);
225 extern void book3e_idle(void);
226
227 /*
228 * ppc_md contains a copy of the machine description structure for the
229 * current platform. machine_id contains the initial address where the
230 * description was found during boot.
231 */
232 extern struct machdep_calls ppc_md;
233 extern struct machdep_calls *machine_id;
234
235 #define __machine_desc __section(".machine.desc")
236
237 #define define_machine(name) \
238 extern struct machdep_calls mach_##name; \
239 EXPORT_SYMBOL(mach_##name); \
240 struct machdep_calls mach_##name __machine_desc =
241
242 #define machine_is(name) \
243 ({ \
244 extern struct machdep_calls mach_##name \
245 __attribute__((weak)); \
246 machine_id == &mach_##name; \
247 })
248
249 extern void probe_machine(void);
250
251 #ifdef CONFIG_PPC_PMAC
252 /*
253 * Power macintoshes have either a CUDA, PMU or SMU controlling
254 * system reset, power, NVRAM, RTC.
255 */
256 typedef enum sys_ctrler_kind {
257 SYS_CTRLER_UNKNOWN = 0,
258 SYS_CTRLER_CUDA = 1,
259 SYS_CTRLER_PMU = 2,
260 SYS_CTRLER_SMU = 3,
261 } sys_ctrler_t;
262 extern sys_ctrler_t sys_ctrler;
263
264 #endif /* CONFIG_PPC_PMAC */
265
log_error(char * buf,unsigned int err_type,int fatal)266 static inline void log_error(char *buf, unsigned int err_type, int fatal)
267 {
268 if (ppc_md.log_error)
269 ppc_md.log_error(buf, err_type, fatal);
270 }
271
272 #define __define_machine_initcall(mach, fn, id) \
273 static int __init __machine_initcall_##mach##_##fn(void) { \
274 if (machine_is(mach)) return fn(); \
275 return 0; \
276 } \
277 __define_initcall(__machine_initcall_##mach##_##fn, id);
278
279 #define machine_early_initcall(mach, fn) __define_machine_initcall(mach, fn, early)
280 #define machine_core_initcall(mach, fn) __define_machine_initcall(mach, fn, 1)
281 #define machine_core_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 1s)
282 #define machine_postcore_initcall(mach, fn) __define_machine_initcall(mach, fn, 2)
283 #define machine_postcore_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 2s)
284 #define machine_arch_initcall(mach, fn) __define_machine_initcall(mach, fn, 3)
285 #define machine_arch_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 3s)
286 #define machine_subsys_initcall(mach, fn) __define_machine_initcall(mach, fn, 4)
287 #define machine_subsys_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 4s)
288 #define machine_fs_initcall(mach, fn) __define_machine_initcall(mach, fn, 5)
289 #define machine_fs_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 5s)
290 #define machine_rootfs_initcall(mach, fn) __define_machine_initcall(mach, fn, rootfs)
291 #define machine_device_initcall(mach, fn) __define_machine_initcall(mach, fn, 6)
292 #define machine_device_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 6s)
293 #define machine_late_initcall(mach, fn) __define_machine_initcall(mach, fn, 7)
294 #define machine_late_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 7s)
295
296 #endif /* __KERNEL__ */
297 #endif /* _ASM_POWERPC_MACHDEP_H */
298
