Loading...
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;
32
33struct machdep_calls {
34 char *name;
35#ifdef CONFIG_PPC64
36 void (*hpte_invalidate)(unsigned long slot,
37 unsigned long va,
38 int psize, int ssize,
39 int local);
40 long (*hpte_updatepp)(unsigned long slot,
41 unsigned long newpp,
42 unsigned long va,
43 int psize, int ssize,
44 int local);
45 void (*hpte_updateboltedpp)(unsigned long newpp,
46 unsigned long ea,
47 int psize, int ssize);
48 long (*hpte_insert)(unsigned long hpte_group,
49 unsigned long va,
50 unsigned long prpn,
51 unsigned long rflags,
52 unsigned long vflags,
53 int psize, int ssize);
54 long (*hpte_remove)(unsigned long hpte_group);
55 void (*hpte_removebolted)(unsigned long ea,
56 int psize, int ssize);
57 void (*flush_hash_range)(unsigned long number, int local);
58
59 /* special for kexec, to be called in real mode, linear mapping is
60 * destroyed as well */
61 void (*hpte_clear_all)(void);
62
63 int (*tce_build)(struct iommu_table *tbl,
64 long index,
65 long npages,
66 unsigned long uaddr,
67 enum dma_data_direction direction,
68 struct dma_attrs *attrs);
69 void (*tce_free)(struct iommu_table *tbl,
70 long index,
71 long npages);
72 unsigned long (*tce_get)(struct iommu_table *tbl,
73 long index);
74 void (*tce_flush)(struct iommu_table *tbl);
75
76 void __iomem * (*ioremap)(phys_addr_t addr, unsigned long size,
77 unsigned long flags, void *caller);
78 void (*iounmap)(volatile void __iomem *token);
79
80#ifdef CONFIG_PM
81 void (*iommu_save)(void);
82 void (*iommu_restore)(void);
83#endif
84#endif /* CONFIG_PPC64 */
85
86 void (*pci_dma_dev_setup)(struct pci_dev *dev);
87 void (*pci_dma_bus_setup)(struct pci_bus *bus);
88
89 /* Platform set_dma_mask and dma_get_required_mask overrides */
90 int (*dma_set_mask)(struct device *dev, u64 dma_mask);
91 u64 (*dma_get_required_mask)(struct device *dev);
92
93 int (*probe)(void);
94 void (*setup_arch)(void); /* Optional, may be NULL */
95 void (*init_early)(void);
96 /* Optional, may be NULL. */
97 void (*show_cpuinfo)(struct seq_file *m);
98 void (*show_percpuinfo)(struct seq_file *m, int i);
99
100 void (*init_IRQ)(void);
101
102 /* Return an irq, or NO_IRQ to indicate there are none pending. */
103 unsigned int (*get_irq)(void);
104
105 /* PCI stuff */
106 /* Called after scanning the bus, before allocating resources */
107 void (*pcibios_fixup)(void);
108 int (*pci_probe_mode)(struct pci_bus *);
109 void (*pci_irq_fixup)(struct pci_dev *dev);
110
111 /* To setup PHBs when using automatic OF platform driver for PCI */
112 int (*pci_setup_phb)(struct pci_controller *host);
113
114#ifdef CONFIG_PCI_MSI
115 int (*msi_check_device)(struct pci_dev* dev,
116 int nvec, int type);
117 int (*setup_msi_irqs)(struct pci_dev *dev,
118 int nvec, int type);
119 void (*teardown_msi_irqs)(struct pci_dev *dev);
120#endif
121
122 void (*restart)(char *cmd);
123 void (*power_off)(void);
124 void (*halt)(void);
125 void (*panic)(char *str);
126 void (*cpu_die)(void);
127
128 long (*time_init)(void); /* Optional, may be NULL */
129
130 int (*set_rtc_time)(struct rtc_time *);
131 void (*get_rtc_time)(struct rtc_time *);
132 unsigned long (*get_boot_time)(void);
133 unsigned char (*rtc_read_val)(int addr);
134 void (*rtc_write_val)(int addr, unsigned char val);
135
136 void (*calibrate_decr)(void);
137
138 void (*progress)(char *, unsigned short);
139
140 /* Interface for platform error logging */
141 void (*log_error)(char *buf, unsigned int err_type, int fatal);
142
143 unsigned char (*nvram_read_val)(int addr);
144 void (*nvram_write_val)(int addr, unsigned char val);
145 ssize_t (*nvram_write)(char *buf, size_t count, loff_t *index);
146 ssize_t (*nvram_read)(char *buf, size_t count, loff_t *index);
147 ssize_t (*nvram_size)(void);
148 void (*nvram_sync)(void);
149
150 /* Exception handlers */
151 int (*system_reset_exception)(struct pt_regs *regs);
152 int (*machine_check_exception)(struct pt_regs *regs);
153
154 /* Motherboard/chipset features. This is a kind of general purpose
155 * hook used to control some machine specific features (like reset
156 * lines, chip power control, etc...).
157 */
158 long (*feature_call)(unsigned int feature, ...);
159
160 /* Get legacy PCI/IDE interrupt mapping */
161 int (*pci_get_legacy_ide_irq)(struct pci_dev *dev, int channel);
162
163 /* Get access protection for /dev/mem */
164 pgprot_t (*phys_mem_access_prot)(struct file *file,
165 unsigned long pfn,
166 unsigned long size,
167 pgprot_t vma_prot);
168
169 /* Idle loop for this platform, leave empty for default idle loop */
170 void (*idle_loop)(void);
171
172 /*
173 * Function for waiting for work with reduced power in idle loop;
174 * called with interrupts disabled.
175 */
176 void (*power_save)(void);
177
178 /* Function to enable performance monitor counters for this
179 platform, called once per cpu. */
180 void (*enable_pmcs)(void);
181
182 /* Set DABR for this platform, leave empty for default implemenation */
183 int (*set_dabr)(unsigned long dabr);
184
185#ifdef CONFIG_PPC32 /* XXX for now */
186 /* A general init function, called by ppc_init in init/main.c.
187 May be NULL. */
188 void (*init)(void);
189
190 void (*kgdb_map_scc)(void);
191
192 /*
193 * optional PCI "hooks"
194 */
195 /* Called at then very end of pcibios_init() */
196 void (*pcibios_after_init)(void);
197
198#endif /* CONFIG_PPC32 */
199
200 /* Called in indirect_* to avoid touching devices */
201 int (*pci_exclude_device)(struct pci_controller *, unsigned char, unsigned char);
202
203 /* Called after PPC generic resource fixup to perform
204 machine specific fixups */
205 void (*pcibios_fixup_resources)(struct pci_dev *);
206
207 /* Called for each PCI bus in the system when it's probed */
208 void (*pcibios_fixup_bus)(struct pci_bus *);
209
210 /* Called when pci_enable_device() is called. Returns 0 to
211 * allow assignment/enabling of the device. */
212 int (*pcibios_enable_device_hook)(struct pci_dev *);
213
214 /* Called after scan and before resource survey */
215 void (*pcibios_fixup_phb)(struct pci_controller *hose);
216
217 /* Called to shutdown machine specific hardware not already controlled
218 * by other drivers.
219 */
220 void (*machine_shutdown)(void);
221
222#ifdef CONFIG_KEXEC
223 void (*kexec_cpu_down)(int crash_shutdown, int secondary);
224
225 /* Called to do what every setup is needed on image and the
226 * reboot code buffer. Returns 0 on success.
227 * Provide your own (maybe dummy) implementation if your platform
228 * claims to support kexec.
229 */
230 int (*machine_kexec_prepare)(struct kimage *image);
231
232 /* Called to perform the _real_ kexec.
233 * Do NOT allocate memory or fail here. We are past the point of
234 * no return.
235 */
236 void (*machine_kexec)(struct kimage *image);
237#endif /* CONFIG_KEXEC */
238
239#ifdef CONFIG_SUSPEND
240 /* These are called to disable and enable, respectively, IRQs when
241 * entering a suspend state. If NULL, then the generic versions
242 * will be called. The generic versions disable/enable the
243 * decrementer along with interrupts.
244 */
245 void (*suspend_disable_irqs)(void);
246 void (*suspend_enable_irqs)(void);
247#endif
248 int (*suspend_disable_cpu)(void);
249
250#ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
251 ssize_t (*cpu_probe)(const char *, size_t);
252 ssize_t (*cpu_release)(const char *, size_t);
253#endif
254};
255
256extern void e500_idle(void);
257extern void power4_idle(void);
258extern void power7_idle(void);
259extern void ppc6xx_idle(void);
260extern void book3e_idle(void);
261
262/*
263 * ppc_md contains a copy of the machine description structure for the
264 * current platform. machine_id contains the initial address where the
265 * description was found during boot.
266 */
267extern struct machdep_calls ppc_md;
268extern struct machdep_calls *machine_id;
269
270#define __machine_desc __attribute__ ((__section__ (".machine.desc")))
271
272#define define_machine(name) \
273 extern struct machdep_calls mach_##name; \
274 EXPORT_SYMBOL(mach_##name); \
275 struct machdep_calls mach_##name __machine_desc =
276
277#define machine_is(name) \
278 ({ \
279 extern struct machdep_calls mach_##name \
280 __attribute__((weak)); \
281 machine_id == &mach_##name; \
282 })
283
284extern void probe_machine(void);
285
286extern char cmd_line[COMMAND_LINE_SIZE];
287
288#ifdef CONFIG_PPC_PMAC
289/*
290 * Power macintoshes have either a CUDA, PMU or SMU controlling
291 * system reset, power, NVRAM, RTC.
292 */
293typedef enum sys_ctrler_kind {
294 SYS_CTRLER_UNKNOWN = 0,
295 SYS_CTRLER_CUDA = 1,
296 SYS_CTRLER_PMU = 2,
297 SYS_CTRLER_SMU = 3,
298} sys_ctrler_t;
299extern sys_ctrler_t sys_ctrler;
300
301#endif /* CONFIG_PPC_PMAC */
302
303
304/* Functions to produce codes on the leds.
305 * The SRC code should be unique for the message category and should
306 * be limited to the lower 24 bits (the upper 8 are set by these funcs),
307 * and (for boot & dump) should be sorted numerically in the order
308 * the events occur.
309 */
310/* Print a boot progress message. */
311void ppc64_boot_msg(unsigned int src, const char *msg);
312
313static inline void log_error(char *buf, unsigned int err_type, int fatal)
314{
315 if (ppc_md.log_error)
316 ppc_md.log_error(buf, err_type, fatal);
317}
318
319#define __define_machine_initcall(mach,level,fn,id) \
320 static int __init __machine_initcall_##mach##_##fn(void) { \
321 if (machine_is(mach)) return fn(); \
322 return 0; \
323 } \
324 __define_initcall(level,__machine_initcall_##mach##_##fn,id);
325
326#define machine_core_initcall(mach,fn) __define_machine_initcall(mach,"1",fn,1)
327#define machine_core_initcall_sync(mach,fn) __define_machine_initcall(mach,"1s",fn,1s)
328#define machine_postcore_initcall(mach,fn) __define_machine_initcall(mach,"2",fn,2)
329#define machine_postcore_initcall_sync(mach,fn) __define_machine_initcall(mach,"2s",fn,2s)
330#define machine_arch_initcall(mach,fn) __define_machine_initcall(mach,"3",fn,3)
331#define machine_arch_initcall_sync(mach,fn) __define_machine_initcall(mach,"3s",fn,3s)
332#define machine_subsys_initcall(mach,fn) __define_machine_initcall(mach,"4",fn,4)
333#define machine_subsys_initcall_sync(mach,fn) __define_machine_initcall(mach,"4s",fn,4s)
334#define machine_fs_initcall(mach,fn) __define_machine_initcall(mach,"5",fn,5)
335#define machine_fs_initcall_sync(mach,fn) __define_machine_initcall(mach,"5s",fn,5s)
336#define machine_rootfs_initcall(mach,fn) __define_machine_initcall(mach,"rootfs",fn,rootfs)
337#define machine_device_initcall(mach,fn) __define_machine_initcall(mach,"6",fn,6)
338#define machine_device_initcall_sync(mach,fn) __define_machine_initcall(mach,"6s",fn,6s)
339#define machine_late_initcall(mach,fn) __define_machine_initcall(mach,"7",fn,7)
340#define machine_late_initcall_sync(mach,fn) __define_machine_initcall(mach,"7s",fn,7s)
341
342#endif /* __KERNEL__ */
343#endif /* _ASM_POWERPC_MACHDEP_H */