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 /* finds all the pci_controllers present at boot */
63 void (*discover_phbs)(void);
64
65 /* To setup PHBs when using automatic OF platform driver for PCI */
66 int (*pci_setup_phb)(struct pci_controller *host);
67
68 void __noreturn (*restart)(char *cmd);
69 void __noreturn (*halt)(void);
70 void (*panic)(char *str);
71
72 long (*time_init)(void); /* Optional, may be NULL */
73
74 int (*set_rtc_time)(struct rtc_time *);
75 void (*get_rtc_time)(struct rtc_time *);
76 time64_t (*get_boot_time)(void);
77 unsigned char (*rtc_read_val)(int addr);
78 void (*rtc_write_val)(int addr, unsigned char val);
79
80 void (*calibrate_decr)(void);
81
82 void (*progress)(char *, unsigned short);
83
84 /* Interface for platform error logging */
85 void (*log_error)(char *buf, unsigned int err_type, int fatal);
86
87 unsigned char (*nvram_read_val)(int addr);
88 void (*nvram_write_val)(int addr, unsigned char val);
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);
92 void (*nvram_sync)(void);
93
94 /* Exception handlers */
95 int (*system_reset_exception)(struct pt_regs *regs);
96 int (*machine_check_exception)(struct pt_regs *regs);
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);
101 long (*machine_check_early)(struct pt_regs *regs);
102
103 /* Called during machine check exception to retrive fixup address. */
104 bool (*mce_check_early_recovery)(struct pt_regs *regs);
105
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
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,
117 unsigned long pfn,
118 unsigned long size,
119 pgprot_t vma_prot);
120
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
127 /* Function to enable performance monitor counters for this
128 platform, called once per cpu. */
129 void (*enable_pmcs)(void);
130
131 /* Set DABR for this platform, leave empty for default implementation */
132 int (*set_dabr)(unsigned long dabr,
133 unsigned long dabrx);
134
135 /* Set DAWR for this platform, leave empty for default implementation */
136 int (*set_dawr)(int nr, unsigned long dawr,
137 unsigned long dawrx);
138
139 #ifdef CONFIG_PPC32 /* XXX for now */
140 /* A general init function, called by ppc_init in init/main.c.
141 May be NULL. */
142 void (*init)(void);
143
144 void (*kgdb_map_scc)(void);
145
146 /*
147 * optional PCI "hooks"
148 */
149 /* Called at then very end of pcibios_init() */
150 void (*pcibios_after_init)(void);
151
152 #endif /* CONFIG_PPC32 */
153
154 /* Called in indirect_* to avoid touching devices */
155 int (*pci_exclude_device)(struct pci_controller *, unsigned char, unsigned char);
156
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
164 /* Called after scan and before resource survey */
165 void (*pcibios_fixup_phb)(struct pci_controller *hose);
166
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
173 resource_size_t (*pcibios_default_alignment)(void);
174
175 #ifdef CONFIG_PCI_IOV
176 void (*pcibios_fixup_sriov)(struct pci_dev *pdev);
177 resource_size_t (*pcibios_iov_resource_alignment)(struct pci_dev *, int resno);
178 int (*pcibios_sriov_enable)(struct pci_dev *pdev, u16 num_vfs);
179 int (*pcibios_sriov_disable)(struct pci_dev *pdev);
180 #endif /* CONFIG_PCI_IOV */
181
182 /* Called to shutdown machine specific hardware not already controlled
183 * by other drivers.
184 */
185 void (*machine_shutdown)(void);
186
187 #ifdef CONFIG_KEXEC_CORE
188 void (*kexec_cpu_down)(int crash_shutdown, int secondary);
189
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);
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);
202 #endif /* CONFIG_KEXEC_CORE */
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
213 int (*suspend_disable_cpu)(void);
214
215 #ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
216 ssize_t (*cpu_probe)(const char *, size_t);
217 ssize_t (*cpu_release)(const char *, size_t);
218 #endif
219
220 #ifdef CONFIG_ARCH_RANDOM
221 int (*get_random_seed)(unsigned long *v);
222 #endif
223 };
224
225 extern void e500_idle(void);
226 extern void power4_idle(void);
227 extern void ppc6xx_idle(void);
228 extern 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 */
235 extern struct machdep_calls ppc_md;
236 extern struct machdep_calls *machine_id;
237
238 #define __machine_desc __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
252 extern 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 */
259 typedef 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;
265 extern sys_ctrler_t sys_ctrler;
266
267 #endif /* CONFIG_PPC_PMAC */
268
log_error(char * buf,unsigned int err_type,int fatal)269 static 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 */
301