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
12 struct pt_regs;
13 struct pci_bus;
14 struct device_node;
15 struct iommu_table;
16 struct rtc_time;
17 struct file;
18 struct pci_controller;
19 struct kimage;
20 struct pci_host_bridge;
21
22 struct machdep_calls {
23 const char *name;
24 const char *compatible;
25 #ifdef CONFIG_PPC64
26 #ifdef CONFIG_PM
27 void (*iommu_restore)(void);
28 #endif
29 #ifdef CONFIG_MEMORY_HOTPLUG
30 unsigned long (*memory_block_size)(void);
31 #endif
32 #endif /* CONFIG_PPC64 */
33
34 void (*dma_set_mask)(struct device *dev, u64 dma_mask);
35
36 int (*probe)(void);
37 void (*setup_arch)(void); /* Optional, may be NULL */
38 /* Optional, may be NULL. */
39 void (*show_cpuinfo)(struct seq_file *m);
40 /* Returns the current operating frequency of "cpu" in Hz */
41 unsigned long (*get_proc_freq)(unsigned int cpu);
42
43 void (*init_IRQ)(void);
44
45 /* Return an irq, or 0 to indicate there are none pending. */
46 unsigned int (*get_irq)(void);
47
48 /* PCI stuff */
49 /* Called after allocating resources */
50 void (*pcibios_fixup)(void);
51 void (*pci_irq_fixup)(struct pci_dev *dev);
52 int (*pcibios_root_bridge_prepare)(struct pci_host_bridge
53 *bridge);
54
55 /* finds all the pci_controllers present at boot */
56 void (*discover_phbs)(void);
57
58 /* To setup PHBs when using automatic OF platform driver for PCI */
59 int (*pci_setup_phb)(struct pci_controller *host);
60
61 void __noreturn (*restart)(char *cmd);
62 void __noreturn (*halt)(void);
63 void (*panic)(char *str);
64
65 long (*time_init)(void); /* Optional, may be NULL */
66
67 int (*set_rtc_time)(struct rtc_time *);
68 void (*get_rtc_time)(struct rtc_time *);
69 time64_t (*get_boot_time)(void);
70
71 void (*calibrate_decr)(void);
72
73 void (*progress)(char *, unsigned short);
74
75 /* Interface for platform error logging */
76 void (*log_error)(char *buf, unsigned int err_type, int fatal);
77
78 unsigned char (*nvram_read_val)(int addr);
79 void (*nvram_write_val)(int addr, unsigned char val);
80 ssize_t (*nvram_write)(char *buf, size_t count, loff_t *index);
81 ssize_t (*nvram_read)(char *buf, size_t count, loff_t *index);
82 ssize_t (*nvram_size)(void);
83 void (*nvram_sync)(void);
84
85 /* Exception handlers */
86 int (*system_reset_exception)(struct pt_regs *regs);
87 int (*machine_check_exception)(struct pt_regs *regs);
88 int (*handle_hmi_exception)(struct pt_regs *regs);
89
90 /* Early exception handlers called in realmode */
91 int (*hmi_exception_early)(struct pt_regs *regs);
92 long (*machine_check_early)(struct pt_regs *regs);
93
94 /* Called during machine check exception to retrive fixup address. */
95 bool (*mce_check_early_recovery)(struct pt_regs *regs);
96
97 void (*machine_check_log_err)(void);
98
99 /* Motherboard/chipset features. This is a kind of general purpose
100 * hook used to control some machine specific features (like reset
101 * lines, chip power control, etc...).
102 */
103 long (*feature_call)(unsigned int feature, ...);
104
105 /* Get legacy PCI/IDE interrupt mapping */
106 int (*pci_get_legacy_ide_irq)(struct pci_dev *dev, int channel);
107
108 /* Get access protection for /dev/mem */
109 pgprot_t (*phys_mem_access_prot)(struct file *file,
110 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
206 extern void e500_idle(void);
207 extern void power4_idle(void);
208 extern 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 */
215 extern struct machdep_calls ppc_md;
216 extern 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
__machine_is(const struct machdep_calls * md)225 static 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
log_error(char * buf,unsigned int err_type,int fatal)237 static 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 */
269