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