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 struct pt_regs;
12 struct pci_bus;
13 struct device_node;
14 struct iommu_table;
15 struct rtc_time;
16 struct file;
17 struct pci_controller;
18 struct kimage;
19 struct pci_host_bridge;
20
21 struct machdep_calls {
22 char *name;
23 #ifdef CONFIG_PPC64
24 #ifdef CONFIG_PM
25 void (*iommu_restore)(void);
26 #endif
27 #ifdef CONFIG_MEMORY_HOTPLUG
28 unsigned long (*memory_block_size)(void);
29 #endif
30 #endif /* CONFIG_PPC64 */
31
32 void (*dma_set_mask)(struct device *dev, u64 dma_mask);
33
34 int (*probe)(void);
35 void (*setup_arch)(void); /* Optional, may be NULL */
36 /* Optional, may be NULL. */
37 void (*show_cpuinfo)(struct seq_file *m);
38 /* Returns the current operating frequency of "cpu" in Hz */
39 unsigned long (*get_proc_freq)(unsigned int cpu);
40
41 void (*init_IRQ)(void);
42
43 /* Return an irq, or 0 to indicate there are none pending. */
44 unsigned int (*get_irq)(void);
45
46 /* PCI stuff */
47 /* Called after allocating resources */
48 void (*pcibios_fixup)(void);
49 void (*pci_irq_fixup)(struct pci_dev *dev);
50 int (*pcibios_root_bridge_prepare)(struct pci_host_bridge
51 *bridge);
52
53 /* finds all the pci_controllers present at boot */
54 void (*discover_phbs)(void);
55
56 /* To setup PHBs when using automatic OF platform driver for PCI */
57 int (*pci_setup_phb)(struct pci_controller *host);
58
59 void __noreturn (*restart)(char *cmd);
60 void __noreturn (*halt)(void);
61 void (*panic)(char *str);
62
63 long (*time_init)(void); /* Optional, may be NULL */
64
65 int (*set_rtc_time)(struct rtc_time *);
66 void (*get_rtc_time)(struct rtc_time *);
67 time64_t (*get_boot_time)(void);
68
69 void (*calibrate_decr)(void);
70
71 void (*progress)(char *, unsigned short);
72
73 /* Interface for platform error logging */
74 void (*log_error)(char *buf, unsigned int err_type, int fatal);
75
76 unsigned char (*nvram_read_val)(int addr);
77 void (*nvram_write_val)(int addr, unsigned char val);
78 ssize_t (*nvram_write)(char *buf, size_t count, loff_t *index);
79 ssize_t (*nvram_read)(char *buf, size_t count, loff_t *index);
80 ssize_t (*nvram_size)(void);
81 void (*nvram_sync)(void);
82
83 /* Exception handlers */
84 int (*system_reset_exception)(struct pt_regs *regs);
85 int (*machine_check_exception)(struct pt_regs *regs);
86 int (*handle_hmi_exception)(struct pt_regs *regs);
87
88 /* Early exception handlers called in realmode */
89 int (*hmi_exception_early)(struct pt_regs *regs);
90 long (*machine_check_early)(struct pt_regs *regs);
91
92 /* Called during machine check exception to retrive fixup address. */
93 bool (*mce_check_early_recovery)(struct pt_regs *regs);
94
95 void (*machine_check_log_err)(void);
96
97 /* Motherboard/chipset features. This is a kind of general purpose
98 * hook used to control some machine specific features (like reset
99 * lines, chip power control, etc...).
100 */
101 long (*feature_call)(unsigned int feature, ...);
102
103 /* Get legacy PCI/IDE interrupt mapping */
104 int (*pci_get_legacy_ide_irq)(struct pci_dev *dev, int channel);
105
106 /* Get access protection for /dev/mem */
107 pgprot_t (*phys_mem_access_prot)(struct file *file,
108 unsigned long pfn,
109 unsigned long size,
110 pgprot_t vma_prot);
111
112 /*
113 * Function for waiting for work with reduced power in idle loop;
114 * called with interrupts disabled.
115 */
116 void (*power_save)(void);
117
118 /* Function to enable performance monitor counters for this
119 platform, called once per cpu. */
120 void (*enable_pmcs)(void);
121
122 /* Set DABR for this platform, leave empty for default implementation */
123 int (*set_dabr)(unsigned long dabr,
124 unsigned long dabrx);
125
126 /* Set DAWR for this platform, leave empty for default implementation */
127 int (*set_dawr)(int nr, unsigned long dawr,
128 unsigned long dawrx);
129
130 #ifdef CONFIG_PPC32 /* XXX for now */
131 /* A general init function, called by ppc_init in init/main.c.
132 May be NULL. */
133 void (*init)(void);
134
135 /*
136 * optional PCI "hooks"
137 */
138 /* Called at then very end of pcibios_init() */
139 void (*pcibios_after_init)(void);
140
141 #endif /* CONFIG_PPC32 */
142
143 /* Called in indirect_* to avoid touching devices */
144 int (*pci_exclude_device)(struct pci_controller *, unsigned char, unsigned char);
145
146 /* Called after PPC generic resource fixup to perform
147 machine specific fixups */
148 void (*pcibios_fixup_resources)(struct pci_dev *);
149
150 /* Called for each PCI bus in the system when it's probed */
151 void (*pcibios_fixup_bus)(struct pci_bus *);
152
153 /* Called after scan and before resource survey */
154 void (*pcibios_fixup_phb)(struct pci_controller *hose);
155
156 /*
157 * Called after device has been added to bus and
158 * before sysfs has been created.
159 */
160 void (*pcibios_bus_add_device)(struct pci_dev *pdev);
161
162 resource_size_t (*pcibios_default_alignment)(void);
163
164 #ifdef CONFIG_PCI_IOV
165 void (*pcibios_fixup_sriov)(struct pci_dev *pdev);
166 resource_size_t (*pcibios_iov_resource_alignment)(struct pci_dev *, int resno);
167 int (*pcibios_sriov_enable)(struct pci_dev *pdev, u16 num_vfs);
168 int (*pcibios_sriov_disable)(struct pci_dev *pdev);
169 #endif /* CONFIG_PCI_IOV */
170
171 /* Called to shutdown machine specific hardware not already controlled
172 * by other drivers.
173 */
174 void (*machine_shutdown)(void);
175
176 #ifdef CONFIG_KEXEC_CORE
177 void (*kexec_cpu_down)(int crash_shutdown, int secondary);
178
179 /* Called to perform the _real_ kexec.
180 * Do NOT allocate memory or fail here. We are past the point of
181 * no return.
182 */
183 void (*machine_kexec)(struct kimage *image);
184 #endif /* CONFIG_KEXEC_CORE */
185
186 #ifdef CONFIG_SUSPEND
187 /* These are called to disable and enable, respectively, IRQs when
188 * entering a suspend state. If NULL, then the generic versions
189 * will be called. The generic versions disable/enable the
190 * decrementer along with interrupts.
191 */
192 void (*suspend_disable_irqs)(void);
193 void (*suspend_enable_irqs)(void);
194 #endif
195
196 #ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
197 ssize_t (*cpu_probe)(const char *, size_t);
198 ssize_t (*cpu_release)(const char *, size_t);
199 #endif
200
201 int (*get_random_seed)(unsigned long *v);
202 };
203
204 extern void e500_idle(void);
205 extern void power4_idle(void);
206 extern void ppc6xx_idle(void);
207
208 /*
209 * ppc_md contains a copy of the machine description structure for the
210 * current platform. machine_id contains the initial address where the
211 * description was found during boot.
212 */
213 extern struct machdep_calls ppc_md;
214 extern struct machdep_calls *machine_id;
215
216 #define __machine_desc __section(".machine.desc")
217
218 #define define_machine(name) \
219 extern struct machdep_calls mach_##name; \
220 EXPORT_SYMBOL(mach_##name); \
221 struct machdep_calls mach_##name __machine_desc =
222
223 #define machine_is(name) \
224 ({ \
225 extern struct machdep_calls mach_##name \
226 __attribute__((weak)); \
227 machine_id == &mach_##name; \
228 })
229
log_error(char * buf,unsigned int err_type,int fatal)230 static inline void log_error(char *buf, unsigned int err_type, int fatal)
231 {
232 if (ppc_md.log_error)
233 ppc_md.log_error(buf, err_type, fatal);
234 }
235
236 #define __define_machine_initcall(mach, fn, id) \
237 static int __init __machine_initcall_##mach##_##fn(void) { \
238 if (machine_is(mach)) return fn(); \
239 return 0; \
240 } \
241 __define_initcall(__machine_initcall_##mach##_##fn, id);
242
243 #define machine_early_initcall(mach, fn) __define_machine_initcall(mach, fn, early)
244 #define machine_core_initcall(mach, fn) __define_machine_initcall(mach, fn, 1)
245 #define machine_core_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 1s)
246 #define machine_postcore_initcall(mach, fn) __define_machine_initcall(mach, fn, 2)
247 #define machine_postcore_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 2s)
248 #define machine_arch_initcall(mach, fn) __define_machine_initcall(mach, fn, 3)
249 #define machine_arch_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 3s)
250 #define machine_subsys_initcall(mach, fn) __define_machine_initcall(mach, fn, 4)
251 #define machine_subsys_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 4s)
252 #define machine_fs_initcall(mach, fn) __define_machine_initcall(mach, fn, 5)
253 #define machine_fs_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 5s)
254 #define machine_rootfs_initcall(mach, fn) __define_machine_initcall(mach, fn, rootfs)
255 #define machine_device_initcall(mach, fn) __define_machine_initcall(mach, fn, 6)
256 #define machine_device_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 6s)
257 #define machine_late_initcall(mach, fn) __define_machine_initcall(mach, fn, 7)
258 #define machine_late_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 7s)
259
260 #endif /* __KERNEL__ */
261 #endif /* _ASM_POWERPC_MACHDEP_H */
262