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2874c5fd 1/* SPDX-License-Identifier: GPL-2.0-or-later */
b41fc4f8
PM
2#ifndef _ASM_POWERPC_MACHDEP_H
3#define _ASM_POWERPC_MACHDEP_H
143a1dec 4#ifdef __KERNEL__
1da177e4 5
1da177e4
LT
6#include <linux/seq_file.h>
7#include <linux/init.h>
8#include <linux/dma-mapping.h>
93087948 9#include <linux/export.h>
1da177e4
LT
10
11#include <asm/setup.h>
12
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PM
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
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LT
18struct pt_regs;
19struct pci_bus;
20struct device_node;
21struct iommu_table;
22struct rtc_time;
23struct file;
4c9d2800 24struct pci_controller;
3d1229d6 25struct kimage;
d82fb31a 26struct pci_host_bridge;
1da177e4 27
1da177e4 28struct machdep_calls {
e8222502 29 char *name;
143a1dec 30#ifdef CONFIG_PPC64
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JB
31#ifdef CONFIG_PM
32 void (*iommu_save)(void);
33 void (*iommu_restore)(void);
34#endif
a5d86257
AB
35#ifdef CONFIG_MEMORY_HOTPLUG_SPARSE
36 unsigned long (*memory_block_size)(void);
37#endif
e8222502 38#endif /* CONFIG_PPC64 */
1da177e4 39
11ddce15 40 void (*dma_set_mask)(struct device *dev, u64 dma_mask);
5b6e9ff6 41
e8222502 42 int (*probe)(void);
38db7e74 43 void (*setup_arch)(void); /* Optional, may be NULL */
1da177e4 44 /* Optional, may be NULL. */
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45 void (*show_cpuinfo)(struct seq_file *m);
46 void (*show_percpuinfo)(struct seq_file *m, int i);
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47 /* Returns the current operating frequency of "cpu" in Hz */
48 unsigned long (*get_proc_freq)(unsigned int cpu);
1da177e4
LT
49
50 void (*init_IRQ)(void);
9b647a30 51
ef24ba70 52 /* Return an irq, or 0 to indicate there are none pending. */
35a84c2f 53 unsigned int (*get_irq)(void);
1da177e4
LT
54
55 /* PCI stuff */
6ec73343 56 /* Called after allocating resources */
1da177e4 57 void (*pcibios_fixup)(void);
f90bb153 58 void (*pci_irq_fixup)(struct pci_dev *dev);
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KSS
59 int (*pcibios_root_bridge_prepare)(struct pci_host_bridge
60 *bridge);
1da177e4 61
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OH
62 /* finds all the pci_controllers present at boot */
63 void (*discover_phbs)(void);
64
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65 /* To setup PHBs when using automatic OF platform driver for PCI */
66 int (*pci_setup_phb)(struct pci_controller *host);
67
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68 void __noreturn (*restart)(char *cmd);
69 void __noreturn (*halt)(void);
ab9dbf77 70 void (*panic)(char *str);
1da177e4 71
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72 long (*time_init)(void); /* Optional, may be NULL */
73
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LT
74 int (*set_rtc_time)(struct rtc_time *);
75 void (*get_rtc_time)(struct rtc_time *);
5bfd6435 76 time64_t (*get_boot_time)(void);
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PM
77 unsigned char (*rtc_read_val)(int addr);
78 void (*rtc_write_val)(int addr, unsigned char val);
1da177e4
LT
79
80 void (*calibrate_decr)(void);
81
82 void (*progress)(char *, unsigned short);
83
1da177e4
LT
84 /* Interface for platform error logging */
85 void (*log_error)(char *buf, unsigned int err_type, int fatal);
86
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87 unsigned char (*nvram_read_val)(int addr);
88 void (*nvram_write_val)(int addr, unsigned char val);
1da177e4
LT
89 ssize_t (*nvram_write)(char *buf, size_t count, loff_t *index);
90 ssize_t (*nvram_read)(char *buf, size_t count, loff_t *index);
91 ssize_t (*nvram_size)(void);
143a1dec 92 void (*nvram_sync)(void);
1da177e4
LT
93
94 /* Exception handlers */
c902be71 95 int (*system_reset_exception)(struct pt_regs *regs);
1da177e4 96 int (*machine_check_exception)(struct pt_regs *regs);
0869b6fd
MS
97 int (*handle_hmi_exception)(struct pt_regs *regs);
98
99 /* Early exception handlers called in realmode */
100 int (*hmi_exception_early)(struct pt_regs *regs);
a43c1590 101 long (*machine_check_early)(struct pt_regs *regs);
1da177e4 102
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MS
103 /* Called during machine check exception to retrive fixup address. */
104 bool (*mce_check_early_recovery)(struct pt_regs *regs);
105
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LT
106 /* Motherboard/chipset features. This is a kind of general purpose
107 * hook used to control some machine specific features (like reset
108 * lines, chip power control, etc...).
109 */
110 long (*feature_call)(unsigned int feature, ...);
111
1da177e4
LT
112 /* Get legacy PCI/IDE interrupt mapping */
113 int (*pci_get_legacy_ide_irq)(struct pci_dev *dev, int channel);
114
115 /* Get access protection for /dev/mem */
116 pgprot_t (*phys_mem_access_prot)(struct file *file,
8b150478 117 unsigned long pfn,
1da177e4
LT
118 unsigned long size,
119 pgprot_t vma_prot);
120
a0652fc9
PM
121 /*
122 * Function for waiting for work with reduced power in idle loop;
123 * called with interrupts disabled.
124 */
125 void (*power_save)(void);
126
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PM
127 /* Function to enable performance monitor counters for this
128 platform, called once per cpu. */
180a3362 129 void (*enable_pmcs)(void);
143a1dec 130
446957ba 131 /* Set DABR for this platform, leave empty for default implementation */
4474ef05
MN
132 int (*set_dabr)(unsigned long dabr,
133 unsigned long dabrx);
76032de8 134
446957ba 135 /* Set DAWR for this platform, leave empty for default implementation */
03f3e54a 136 int (*set_dawr)(int nr, unsigned long dawr,
bf99de36
MN
137 unsigned long dawrx);
138
143a1dec 139#ifdef CONFIG_PPC32 /* XXX for now */
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PM
140 /* A general init function, called by ppc_init in init/main.c.
141 May be NULL. */
142 void (*init)(void);
143
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PM
144 void (*kgdb_map_scc)(void);
145
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146 /*
147 * optional PCI "hooks"
148 */
143a1dec
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149 /* Called at then very end of pcibios_init() */
150 void (*pcibios_after_init)(void);
151
3d1229d6 152#endif /* CONFIG_PPC32 */
143a1dec 153
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KG
154 /* Called in indirect_* to avoid touching devices */
155 int (*pci_exclude_device)(struct pci_controller *, unsigned char, unsigned char);
156
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BH
157 /* Called after PPC generic resource fixup to perform
158 machine specific fixups */
159 void (*pcibios_fixup_resources)(struct pci_dev *);
160
161 /* Called for each PCI bus in the system when it's probed */
162 void (*pcibios_fixup_bus)(struct pci_bus *);
163
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BH
164 /* Called after scan and before resource survey */
165 void (*pcibios_fixup_phb)(struct pci_controller *hose);
166
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BL
167 /*
168 * Called after device has been added to bus and
169 * before sysfs has been created.
170 */
171 void (*pcibios_bus_add_device)(struct pci_dev *pdev);
172
38274637
YX
173 resource_size_t (*pcibios_default_alignment)(void);
174
6e628c7d
WY
175#ifdef CONFIG_PCI_IOV
176 void (*pcibios_fixup_sriov)(struct pci_dev *pdev);
5350ab3f 177 resource_size_t (*pcibios_iov_resource_alignment)(struct pci_dev *, int resno);
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BL
178 int (*pcibios_sriov_enable)(struct pci_dev *pdev, u16 num_vfs);
179 int (*pcibios_sriov_disable)(struct pci_dev *pdev);
6e628c7d
WY
180#endif /* CONFIG_PCI_IOV */
181
143a1dec
PM
182 /* Called to shutdown machine specific hardware not already controlled
183 * by other drivers.
143a1dec
PM
184 */
185 void (*machine_shutdown)(void);
186
da665885 187#ifdef CONFIG_KEXEC_CORE
50266a1f
AB
188 void (*kexec_cpu_down)(int crash_shutdown, int secondary);
189
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PM
190 /* Called to do what every setup is needed on image and the
191 * reboot code buffer. Returns 0 on success.
192 * Provide your own (maybe dummy) implementation if your platform
193 * claims to support kexec.
194 */
195 int (*machine_kexec_prepare)(struct kimage *image);
357574c4
AB
196
197 /* Called to perform the _real_ kexec.
198 * Do NOT allocate memory or fail here. We are past the point of
199 * no return.
200 */
201 void (*machine_kexec)(struct kimage *image);
da665885 202#endif /* CONFIG_KEXEC_CORE */
7ac5dde9
SW
203
204#ifdef CONFIG_SUSPEND
205 /* These are called to disable and enable, respectively, IRQs when
206 * entering a suspend state. If NULL, then the generic versions
207 * will be called. The generic versions disable/enable the
208 * decrementer along with interrupts.
209 */
210 void (*suspend_disable_irqs)(void);
211 void (*suspend_enable_irqs)(void);
212#endif
12633e80
NF
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
a4da0d50
ME
218
219#ifdef CONFIG_ARCH_RANDOM
01c9348c 220 int (*get_random_seed)(unsigned long *v);
a4da0d50 221#endif
1da177e4
LT
222};
223
fc4033b2 224extern void e500_idle(void);
a0652fc9
PM
225extern void power4_idle(void);
226extern void ppc6xx_idle(void);
34d97e07 227extern void book3e_idle(void);
fd899c0c 228
e8222502
BH
229/*
230 * ppc_md contains a copy of the machine description structure for the
231 * current platform. machine_id contains the initial address where the
232 * description was found during boot.
233 */
1da177e4 234extern struct machdep_calls ppc_md;
e8222502
BH
235extern struct machdep_calls *machine_id;
236
33def849 237#define __machine_desc __section(".machine.desc")
e8222502 238
d0e15bed
PM
239#define define_machine(name) \
240 extern struct machdep_calls mach_##name; \
241 EXPORT_SYMBOL(mach_##name); \
242 struct machdep_calls mach_##name __machine_desc =
243
e8222502
BH
244#define machine_is(name) \
245 ({ \
246 extern struct machdep_calls mach_##name \
247 __attribute__((weak)); \
248 machine_id == &mach_##name; \
249 })
250
251extern void probe_machine(void);
252
1da177e4
LT
253#ifdef CONFIG_PPC_PMAC
254/*
255 * Power macintoshes have either a CUDA, PMU or SMU controlling
256 * system reset, power, NVRAM, RTC.
257 */
258typedef enum sys_ctrler_kind {
259 SYS_CTRLER_UNKNOWN = 0,
260 SYS_CTRLER_CUDA = 1,
261 SYS_CTRLER_PMU = 2,
262 SYS_CTRLER_SMU = 3,
263} sys_ctrler_t;
264extern sys_ctrler_t sys_ctrler;
265
266#endif /* CONFIG_PPC_PMAC */
267
1da177e4
LT
268static inline void log_error(char *buf, unsigned int err_type, int fatal)
269{
270 if (ppc_md.log_error)
271 ppc_md.log_error(buf, err_type, fatal);
272}
273
7929d407 274#define __define_machine_initcall(mach, fn, id) \
800d68c3
GL
275 static int __init __machine_initcall_##mach##_##fn(void) { \
276 if (machine_is(mach)) return fn(); \
277 return 0; \
278 } \
7929d407
ML
279 __define_initcall(__machine_initcall_##mach##_##fn, id);
280
8d3c941e 281#define machine_early_initcall(mach, fn) __define_machine_initcall(mach, fn, early)
7929d407
ML
282#define machine_core_initcall(mach, fn) __define_machine_initcall(mach, fn, 1)
283#define machine_core_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 1s)
284#define machine_postcore_initcall(mach, fn) __define_machine_initcall(mach, fn, 2)
285#define machine_postcore_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 2s)
286#define machine_arch_initcall(mach, fn) __define_machine_initcall(mach, fn, 3)
287#define machine_arch_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 3s)
288#define machine_subsys_initcall(mach, fn) __define_machine_initcall(mach, fn, 4)
289#define machine_subsys_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 4s)
290#define machine_fs_initcall(mach, fn) __define_machine_initcall(mach, fn, 5)
291#define machine_fs_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 5s)
292#define machine_rootfs_initcall(mach, fn) __define_machine_initcall(mach, fn, rootfs)
293#define machine_device_initcall(mach, fn) __define_machine_initcall(mach, fn, 6)
294#define machine_device_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 6s)
295#define machine_late_initcall(mach, fn) __define_machine_initcall(mach, fn, 7)
296#define machine_late_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 7s)
800d68c3 297
1da177e4 298#endif /* __KERNEL__ */
b41fc4f8 299#endif /* _ASM_POWERPC_MACHDEP_H */