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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/compiler.h>
7#include <linux/seq_file.h>
8#include <linux/init.h>
9#include <linux/dma-mapping.h>
10#include <linux/export.h>
11
12struct pt_regs;
13struct pci_bus;
14struct device_node;
15struct iommu_table;
16struct rtc_time;
17struct file;
18struct pci_controller;
19struct kimage;
20struct pci_host_bridge;
21
22struct machdep_calls {
23 const char *name;
24 const char *compatible;
25 const char * const *compatibles;
26#ifdef CONFIG_PPC64
27#ifdef CONFIG_PM
28 void (*iommu_restore)(void);
29#endif
30#ifdef CONFIG_MEMORY_HOTPLUG
31 unsigned long (*memory_block_size)(void);
32#endif
33#endif /* CONFIG_PPC64 */
34
35 void (*dma_set_mask)(struct device *dev, u64 dma_mask);
36
37 int (*probe)(void);
38 void (*setup_arch)(void); /* Optional, may be NULL */
39 /* Optional, may be NULL. */
40 void (*show_cpuinfo)(struct seq_file *m);
41 /* Returns the current operating frequency of "cpu" in Hz */
42 unsigned long (*get_proc_freq)(unsigned int cpu);
43
44 void (*init_IRQ)(void);
45
46 /* Return an irq, or 0 to indicate there are none pending. */
47 unsigned int (*get_irq)(void);
48
49 /* PCI stuff */
50 /* Called after allocating resources */
51 void (*pcibios_fixup)(void);
52 void (*pci_irq_fixup)(struct pci_dev *dev);
53 int (*pcibios_root_bridge_prepare)(struct pci_host_bridge
54 *bridge);
55
56 /* finds all the pci_controllers present at boot */
57 void (*discover_phbs)(void);
58
59 /* To setup PHBs when using automatic OF platform driver for PCI */
60 int (*pci_setup_phb)(struct pci_controller *host);
61
62 void __noreturn (*restart)(char *cmd);
63 void __noreturn (*halt)(void);
64 void (*panic)(char *str);
65
66 long (*time_init)(void); /* Optional, may be NULL */
67
68 int (*set_rtc_time)(struct rtc_time *);
69 void (*get_rtc_time)(struct rtc_time *);
70 time64_t (*get_boot_time)(void);
71
72 void (*calibrate_decr)(void);
73
74 void (*progress)(char *, unsigned short);
75
76 /* Interface for platform error logging */
77 void (*log_error)(char *buf, unsigned int err_type, int fatal);
78
79 unsigned char (*nvram_read_val)(int addr);
80 void (*nvram_write_val)(int addr, unsigned char val);
81 ssize_t (*nvram_write)(char *buf, size_t count, loff_t *index);
82 ssize_t (*nvram_read)(char *buf, size_t count, loff_t *index);
83 ssize_t (*nvram_size)(void);
84 void (*nvram_sync)(void);
85
86 /* Exception handlers */
87 int (*system_reset_exception)(struct pt_regs *regs);
88 int (*machine_check_exception)(struct pt_regs *regs);
89 int (*handle_hmi_exception)(struct pt_regs *regs);
90
91 /* Early exception handlers called in realmode */
92 int (*hmi_exception_early)(struct pt_regs *regs);
93 long (*machine_check_early)(struct pt_regs *regs);
94
95 /* Called during machine check exception to retrive fixup address. */
96 bool (*mce_check_early_recovery)(struct pt_regs *regs);
97
98 void (*machine_check_log_err)(void);
99
100 /* Motherboard/chipset features. This is a kind of general purpose
101 * hook used to control some machine specific features (like reset
102 * lines, chip power control, etc...).
103 */
104 long (*feature_call)(unsigned int feature, ...);
105
106 /* Get legacy PCI/IDE interrupt mapping */
107 int (*pci_get_legacy_ide_irq)(struct pci_dev *dev, int channel);
108
109 /* Get access protection for /dev/mem */
110 pgprot_t (*phys_mem_access_prot)(unsigned long pfn,
111 unsigned long size,
112 pgprot_t vma_prot);
113
114 /*
115 * Function for waiting for work with reduced power in idle loop;
116 * called with interrupts disabled.
117 */
118 void (*power_save)(void);
119
120 /* Function to enable performance monitor counters for this
121 platform, called once per cpu. */
122 void (*enable_pmcs)(void);
123
124 /* Set DABR for this platform, leave empty for default implementation */
125 int (*set_dabr)(unsigned long dabr,
126 unsigned long dabrx);
127
128 /* Set DAWR for this platform, leave empty for default implementation */
129 int (*set_dawr)(int nr, unsigned long dawr,
130 unsigned long dawrx);
131
132#ifdef CONFIG_PPC32 /* XXX for now */
133 /* A general init function, called by ppc_init in init/main.c.
134 May be NULL. */
135 void (*init)(void);
136
137 /*
138 * optional PCI "hooks"
139 */
140 /* Called at then very end of pcibios_init() */
141 void (*pcibios_after_init)(void);
142
143#endif /* CONFIG_PPC32 */
144
145 /* Called in indirect_* to avoid touching devices */
146 int (*pci_exclude_device)(struct pci_controller *, unsigned char, unsigned char);
147
148 /* Called after PPC generic resource fixup to perform
149 machine specific fixups */
150 void (*pcibios_fixup_resources)(struct pci_dev *);
151
152 /* Called for each PCI bus in the system when it's probed */
153 void (*pcibios_fixup_bus)(struct pci_bus *);
154
155 /* Called after scan and before resource survey */
156 void (*pcibios_fixup_phb)(struct pci_controller *hose);
157
158 /*
159 * Called after device has been added to bus and
160 * before sysfs has been created.
161 */
162 void (*pcibios_bus_add_device)(struct pci_dev *pdev);
163
164 resource_size_t (*pcibios_default_alignment)(void);
165
166#ifdef CONFIG_PCI_IOV
167 void (*pcibios_fixup_sriov)(struct pci_dev *pdev);
168 resource_size_t (*pcibios_iov_resource_alignment)(struct pci_dev *, int resno);
169 int (*pcibios_sriov_enable)(struct pci_dev *pdev, u16 num_vfs);
170 int (*pcibios_sriov_disable)(struct pci_dev *pdev);
171#endif /* CONFIG_PCI_IOV */
172
173 /* Called to shutdown machine specific hardware not already controlled
174 * by other drivers.
175 */
176 void (*machine_shutdown)(void);
177
178#ifdef CONFIG_KEXEC_CORE
179 void (*kexec_cpu_down)(int crash_shutdown, int secondary);
180
181 /* Called to perform the _real_ kexec.
182 * Do NOT allocate memory or fail here. We are past the point of
183 * no return.
184 */
185 void (*machine_kexec)(struct kimage *image);
186#endif /* CONFIG_KEXEC_CORE */
187
188#ifdef CONFIG_SUSPEND
189 /* These are called to disable and enable, respectively, IRQs when
190 * entering a suspend state. If NULL, then the generic versions
191 * will be called. The generic versions disable/enable the
192 * decrementer along with interrupts.
193 */
194 void (*suspend_disable_irqs)(void);
195 void (*suspend_enable_irqs)(void);
196#endif
197
198#ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
199 ssize_t (*cpu_probe)(const char *, size_t);
200 ssize_t (*cpu_release)(const char *, size_t);
201#endif
202
203 int (*get_random_seed)(unsigned long *v);
204};
205
206extern void e500_idle(void);
207extern void power4_idle(void);
208extern void ppc6xx_idle(void);
209
210/*
211 * ppc_md contains a copy of the machine description structure for the
212 * current platform. machine_id contains the initial address where the
213 * description was found during boot.
214 */
215extern struct machdep_calls ppc_md;
216extern struct machdep_calls *machine_id;
217
218#define __machine_desc __section(".machine.desc")
219
220#define define_machine(name) \
221 extern struct machdep_calls mach_##name; \
222 EXPORT_SYMBOL(mach_##name); \
223 struct machdep_calls mach_##name __machine_desc =
224
225static inline bool __machine_is(const struct machdep_calls *md)
226{
227 WARN_ON(!machine_id); // complain if used before probe_machine()
228 return machine_id == md;
229}
230
231#define machine_is(name) \
232 ({ \
233 extern struct machdep_calls mach_##name __weak; \
234 __machine_is(&mach_##name); \
235 })
236
237static inline void log_error(char *buf, unsigned int err_type, int fatal)
238{
239 if (ppc_md.log_error)
240 ppc_md.log_error(buf, err_type, fatal);
241}
242
243#define __define_machine_initcall(mach, fn, id) \
244 static int __init __machine_initcall_##mach##_##fn(void) { \
245 if (machine_is(mach)) return fn(); \
246 return 0; \
247 } \
248 __define_initcall(__machine_initcall_##mach##_##fn, id);
249
250#define machine_early_initcall(mach, fn) __define_machine_initcall(mach, fn, early)
251#define machine_core_initcall(mach, fn) __define_machine_initcall(mach, fn, 1)
252#define machine_core_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 1s)
253#define machine_postcore_initcall(mach, fn) __define_machine_initcall(mach, fn, 2)
254#define machine_postcore_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 2s)
255#define machine_arch_initcall(mach, fn) __define_machine_initcall(mach, fn, 3)
256#define machine_arch_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 3s)
257#define machine_subsys_initcall(mach, fn) __define_machine_initcall(mach, fn, 4)
258#define machine_subsys_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 4s)
259#define machine_fs_initcall(mach, fn) __define_machine_initcall(mach, fn, 5)
260#define machine_fs_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 5s)
261#define machine_rootfs_initcall(mach, fn) __define_machine_initcall(mach, fn, rootfs)
262#define machine_device_initcall(mach, fn) __define_machine_initcall(mach, fn, 6)
263#define machine_device_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 6s)
264#define machine_late_initcall(mach, fn) __define_machine_initcall(mach, fn, 7)
265#define machine_late_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 7s)
266
267#endif /* __KERNEL__ */
268#endif /* _ASM_POWERPC_MACHDEP_H */
1#ifndef _ASM_POWERPC_MACHDEP_H
2#define _ASM_POWERPC_MACHDEP_H
3#ifdef __KERNEL__
4
5/*
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 */
11
12#include <linux/seq_file.h>
13#include <linux/init.h>
14#include <linux/dma-mapping.h>
15#include <linux/export.h>
16
17#include <asm/setup.h>
18
19/* We export this macro for external modules like Alsa to know if
20 * ppc_md.feature_call is implemented or not
21 */
22#define CONFIG_PPC_HAS_FEATURE_CALLS
23
24struct pt_regs;
25struct pci_bus;
26struct device_node;
27struct iommu_table;
28struct rtc_time;
29struct file;
30struct pci_controller;
31struct kimage;
32struct pci_host_bridge;
33
34struct machdep_calls {
35 char *name;
36#ifdef CONFIG_PPC64
37 void __iomem * (*ioremap)(phys_addr_t addr, unsigned long size,
38 unsigned long flags, void *caller);
39 void (*iounmap)(volatile void __iomem *token);
40
41#ifdef CONFIG_PM
42 void (*iommu_save)(void);
43 void (*iommu_restore)(void);
44#endif
45#ifdef CONFIG_MEMORY_HOTPLUG_SPARSE
46 unsigned long (*memory_block_size)(void);
47#endif
48#endif /* CONFIG_PPC64 */
49
50 /* Platform set_dma_mask and dma_get_required_mask overrides */
51 int (*dma_set_mask)(struct device *dev, u64 dma_mask);
52 u64 (*dma_get_required_mask)(struct device *dev);
53
54 int (*probe)(void);
55 void (*setup_arch)(void); /* Optional, may be NULL */
56 /* Optional, may be NULL. */
57 void (*show_cpuinfo)(struct seq_file *m);
58 void (*show_percpuinfo)(struct seq_file *m, int i);
59 /* Returns the current operating frequency of "cpu" in Hz */
60 unsigned long (*get_proc_freq)(unsigned int cpu);
61
62 void (*init_IRQ)(void);
63
64 /* Return an irq, or 0 to indicate there are none pending. */
65 unsigned int (*get_irq)(void);
66
67 /* PCI stuff */
68 /* Called after allocating resources */
69 void (*pcibios_fixup)(void);
70 void (*pci_irq_fixup)(struct pci_dev *dev);
71 int (*pcibios_root_bridge_prepare)(struct pci_host_bridge
72 *bridge);
73
74 /* To setup PHBs when using automatic OF platform driver for PCI */
75 int (*pci_setup_phb)(struct pci_controller *host);
76
77 void __noreturn (*restart)(char *cmd);
78 void __noreturn (*halt)(void);
79 void (*panic)(char *str);
80 void (*cpu_die)(void);
81
82 long (*time_init)(void); /* Optional, may be NULL */
83
84 int (*set_rtc_time)(struct rtc_time *);
85 void (*get_rtc_time)(struct rtc_time *);
86 unsigned long (*get_boot_time)(void);
87 unsigned char (*rtc_read_val)(int addr);
88 void (*rtc_write_val)(int addr, unsigned char val);
89
90 void (*calibrate_decr)(void);
91
92 void (*progress)(char *, unsigned short);
93
94 /* Interface for platform error logging */
95 void (*log_error)(char *buf, unsigned int err_type, int fatal);
96
97 unsigned char (*nvram_read_val)(int addr);
98 void (*nvram_write_val)(int addr, unsigned char val);
99 ssize_t (*nvram_write)(char *buf, size_t count, loff_t *index);
100 ssize_t (*nvram_read)(char *buf, size_t count, loff_t *index);
101 ssize_t (*nvram_size)(void);
102 void (*nvram_sync)(void);
103
104 /* Exception handlers */
105 int (*system_reset_exception)(struct pt_regs *regs);
106 int (*machine_check_exception)(struct pt_regs *regs);
107 int (*handle_hmi_exception)(struct pt_regs *regs);
108
109 /* Early exception handlers called in realmode */
110 int (*hmi_exception_early)(struct pt_regs *regs);
111
112 /* Called during machine check exception to retrive fixup address. */
113 bool (*mce_check_early_recovery)(struct pt_regs *regs);
114
115 /* Motherboard/chipset features. This is a kind of general purpose
116 * hook used to control some machine specific features (like reset
117 * lines, chip power control, etc...).
118 */
119 long (*feature_call)(unsigned int feature, ...);
120
121 /* Get legacy PCI/IDE interrupt mapping */
122 int (*pci_get_legacy_ide_irq)(struct pci_dev *dev, int channel);
123
124 /* Get access protection for /dev/mem */
125 pgprot_t (*phys_mem_access_prot)(struct file *file,
126 unsigned long pfn,
127 unsigned long size,
128 pgprot_t vma_prot);
129
130 /*
131 * Function for waiting for work with reduced power in idle loop;
132 * called with interrupts disabled.
133 */
134 void (*power_save)(void);
135
136 /* Function to enable performance monitor counters for this
137 platform, called once per cpu. */
138 void (*enable_pmcs)(void);
139
140 /* Set DABR for this platform, leave empty for default implementation */
141 int (*set_dabr)(unsigned long dabr,
142 unsigned long dabrx);
143
144 /* Set DAWR for this platform, leave empty for default implementation */
145 int (*set_dawr)(unsigned long dawr,
146 unsigned long dawrx);
147
148#ifdef CONFIG_PPC32 /* XXX for now */
149 /* A general init function, called by ppc_init in init/main.c.
150 May be NULL. */
151 void (*init)(void);
152
153 void (*kgdb_map_scc)(void);
154
155 /*
156 * optional PCI "hooks"
157 */
158 /* Called at then very end of pcibios_init() */
159 void (*pcibios_after_init)(void);
160
161#endif /* CONFIG_PPC32 */
162
163 /* Called in indirect_* to avoid touching devices */
164 int (*pci_exclude_device)(struct pci_controller *, unsigned char, unsigned char);
165
166 /* Called after PPC generic resource fixup to perform
167 machine specific fixups */
168 void (*pcibios_fixup_resources)(struct pci_dev *);
169
170 /* Called for each PCI bus in the system when it's probed */
171 void (*pcibios_fixup_bus)(struct pci_bus *);
172
173 /* Called after scan and before resource survey */
174 void (*pcibios_fixup_phb)(struct pci_controller *hose);
175
176#ifdef CONFIG_PCI_IOV
177 void (*pcibios_fixup_sriov)(struct pci_dev *pdev);
178 resource_size_t (*pcibios_iov_resource_alignment)(struct pci_dev *, int resno);
179#endif /* CONFIG_PCI_IOV */
180
181 /* Called to shutdown machine specific hardware not already controlled
182 * by other drivers.
183 */
184 void (*machine_shutdown)(void);
185
186#ifdef CONFIG_KEXEC_CORE
187 void (*kexec_cpu_down)(int crash_shutdown, int secondary);
188
189 /* Called to do what every setup is needed on image and the
190 * reboot code buffer. Returns 0 on success.
191 * Provide your own (maybe dummy) implementation if your platform
192 * claims to support kexec.
193 */
194 int (*machine_kexec_prepare)(struct kimage *image);
195
196 /* Called to perform the _real_ kexec.
197 * Do NOT allocate memory or fail here. We are past the point of
198 * no return.
199 */
200 void (*machine_kexec)(struct kimage *image);
201#endif /* CONFIG_KEXEC_CORE */
202
203#ifdef CONFIG_SUSPEND
204 /* These are called to disable and enable, respectively, IRQs when
205 * entering a suspend state. If NULL, then the generic versions
206 * will be called. The generic versions disable/enable the
207 * decrementer along with interrupts.
208 */
209 void (*suspend_disable_irqs)(void);
210 void (*suspend_enable_irqs)(void);
211#endif
212 int (*suspend_disable_cpu)(void);
213
214#ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
215 ssize_t (*cpu_probe)(const char *, size_t);
216 ssize_t (*cpu_release)(const char *, size_t);
217#endif
218
219#ifdef CONFIG_ARCH_RANDOM
220 int (*get_random_seed)(unsigned long *v);
221#endif
222};
223
224extern void e500_idle(void);
225extern void power4_idle(void);
226extern void power7_idle(void);
227extern void ppc6xx_idle(void);
228extern void book3e_idle(void);
229
230/*
231 * ppc_md contains a copy of the machine description structure for the
232 * current platform. machine_id contains the initial address where the
233 * description was found during boot.
234 */
235extern struct machdep_calls ppc_md;
236extern struct machdep_calls *machine_id;
237
238#define __machine_desc __attribute__ ((__section__ (".machine.desc")))
239
240#define define_machine(name) \
241 extern struct machdep_calls mach_##name; \
242 EXPORT_SYMBOL(mach_##name); \
243 struct machdep_calls mach_##name __machine_desc =
244
245#define machine_is(name) \
246 ({ \
247 extern struct machdep_calls mach_##name \
248 __attribute__((weak)); \
249 machine_id == &mach_##name; \
250 })
251
252extern void probe_machine(void);
253
254#ifdef CONFIG_PPC_PMAC
255/*
256 * Power macintoshes have either a CUDA, PMU or SMU controlling
257 * system reset, power, NVRAM, RTC.
258 */
259typedef enum sys_ctrler_kind {
260 SYS_CTRLER_UNKNOWN = 0,
261 SYS_CTRLER_CUDA = 1,
262 SYS_CTRLER_PMU = 2,
263 SYS_CTRLER_SMU = 3,
264} sys_ctrler_t;
265extern sys_ctrler_t sys_ctrler;
266
267#endif /* CONFIG_PPC_PMAC */
268
269static inline void log_error(char *buf, unsigned int err_type, int fatal)
270{
271 if (ppc_md.log_error)
272 ppc_md.log_error(buf, err_type, fatal);
273}
274
275#define __define_machine_initcall(mach, fn, id) \
276 static int __init __machine_initcall_##mach##_##fn(void) { \
277 if (machine_is(mach)) return fn(); \
278 return 0; \
279 } \
280 __define_initcall(__machine_initcall_##mach##_##fn, id);
281
282#define machine_early_initcall(mach, fn) __define_machine_initcall(mach, fn, early)
283#define machine_core_initcall(mach, fn) __define_machine_initcall(mach, fn, 1)
284#define machine_core_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 1s)
285#define machine_postcore_initcall(mach, fn) __define_machine_initcall(mach, fn, 2)
286#define machine_postcore_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 2s)
287#define machine_arch_initcall(mach, fn) __define_machine_initcall(mach, fn, 3)
288#define machine_arch_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 3s)
289#define machine_subsys_initcall(mach, fn) __define_machine_initcall(mach, fn, 4)
290#define machine_subsys_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 4s)
291#define machine_fs_initcall(mach, fn) __define_machine_initcall(mach, fn, 5)
292#define machine_fs_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 5s)
293#define machine_rootfs_initcall(mach, fn) __define_machine_initcall(mach, fn, rootfs)
294#define machine_device_initcall(mach, fn) __define_machine_initcall(mach, fn, 6)
295#define machine_device_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 6s)
296#define machine_late_initcall(mach, fn) __define_machine_initcall(mach, fn, 7)
297#define machine_late_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 7s)
298
299#endif /* __KERNEL__ */
300#endif /* _ASM_POWERPC_MACHDEP_H */