1 #ifndef _ASM_POWERPC_MACHDEP_H
2 #define _ASM_POWERPC_MACHDEP_H
3 #ifdef __KERNEL__
4
5 /*
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 */
11
12 #include <linux/seq_file.h>
13 #include <linux/init.h>
14 #include <linux/dma-mapping.h>
15 #include <linux/export.h>
16
17 #include <asm/setup.h>
18
19 /* We export this macro for external modules like Alsa to know if
20 * ppc_md.feature_call is implemented or not
21 */
22 #define CONFIG_PPC_HAS_FEATURE_CALLS
23
24 struct pt_regs;
25 struct pci_bus;
26 struct device_node;
27 struct iommu_table;
28 struct rtc_time;
29 struct file;
30 struct pci_controller;
31 struct kimage;
32 struct pci_host_bridge;
33
34 struct machdep_calls {
35 char *name;
36 #ifdef CONFIG_PPC64
37 void (*hpte_invalidate)(unsigned long slot,
38 unsigned long vpn,
39 int bpsize, int apsize,
40 int ssize, int local);
41 long (*hpte_updatepp)(unsigned long slot,
42 unsigned long newpp,
43 unsigned long vpn,
44 int bpsize, int apsize,
45 int ssize, unsigned long flags);
46 void (*hpte_updateboltedpp)(unsigned long newpp,
47 unsigned long ea,
48 int psize, int ssize);
49 long (*hpte_insert)(unsigned long hpte_group,
50 unsigned long vpn,
51 unsigned long prpn,
52 unsigned long rflags,
53 unsigned long vflags,
54 int psize, int apsize,
55 int ssize);
56 long (*hpte_remove)(unsigned long hpte_group);
57 void (*hpte_removebolted)(unsigned long ea,
58 int psize, int ssize);
59 void (*flush_hash_range)(unsigned long number, int local);
60 void (*hugepage_invalidate)(unsigned long vsid,
61 unsigned long addr,
62 unsigned char *hpte_slot_array,
63 int psize, int ssize, int local);
64 /* special for kexec, to be called in real mode, linear mapping is
65 * destroyed as well */
66 void (*hpte_clear_all)(void);
67
68 int (*tce_build)(struct iommu_table *tbl,
69 long index,
70 long npages,
71 unsigned long uaddr,
72 enum dma_data_direction direction,
73 struct dma_attrs *attrs);
74 void (*tce_free)(struct iommu_table *tbl,
75 long index,
76 long npages);
77 unsigned long (*tce_get)(struct iommu_table *tbl,
78 long index);
79 void (*tce_flush)(struct iommu_table *tbl);
80
81 /* _rm versions are for real mode use only */
82 int (*tce_build_rm)(struct iommu_table *tbl,
83 long index,
84 long npages,
85 unsigned long uaddr,
86 enum dma_data_direction direction,
87 struct dma_attrs *attrs);
88 void (*tce_free_rm)(struct iommu_table *tbl,
89 long index,
90 long npages);
91 void (*tce_flush_rm)(struct iommu_table *tbl);
92
93 void __iomem * (*ioremap)(phys_addr_t addr, unsigned long size,
94 unsigned long flags, void *caller);
95 void (*iounmap)(volatile void __iomem *token);
96
97 #ifdef CONFIG_PM
98 void (*iommu_save)(void);
99 void (*iommu_restore)(void);
100 #endif
101 #ifdef CONFIG_MEMORY_HOTPLUG_SPARSE
102 unsigned long (*memory_block_size)(void);
103 #endif
104 #endif /* CONFIG_PPC64 */
105
106 /* Platform set_dma_mask and dma_get_required_mask overrides */
107 int (*dma_set_mask)(struct device *dev, u64 dma_mask);
108 u64 (*dma_get_required_mask)(struct device *dev);
109
110 int (*probe)(void);
111 void (*setup_arch)(void); /* Optional, may be NULL */
112 void (*init_early)(void);
113 /* Optional, may be NULL. */
114 void (*show_cpuinfo)(struct seq_file *m);
115 void (*show_percpuinfo)(struct seq_file *m, int i);
116 /* Returns the current operating frequency of "cpu" in Hz */
117 unsigned long (*get_proc_freq)(unsigned int cpu);
118
119 void (*init_IRQ)(void);
120
121 /* Return an irq, or NO_IRQ to indicate there are none pending. */
122 unsigned int (*get_irq)(void);
123
124 /* PCI stuff */
125 /* Called after allocating resources */
126 void (*pcibios_fixup)(void);
127 void (*pci_irq_fixup)(struct pci_dev *dev);
128 int (*pcibios_root_bridge_prepare)(struct pci_host_bridge
129 *bridge);
130
131 /* To setup PHBs when using automatic OF platform driver for PCI */
132 int (*pci_setup_phb)(struct pci_controller *host);
133
134 #ifdef CONFIG_PCI_MSI
135 int (*setup_msi_irqs)(struct pci_dev *dev,
136 int nvec, int type);
137 void (*teardown_msi_irqs)(struct pci_dev *dev);
138 #endif
139
140 void (*restart)(char *cmd);
141 void (*halt)(void);
142 void (*panic)(char *str);
143 void (*cpu_die)(void);
144
145 long (*time_init)(void); /* Optional, may be NULL */
146
147 int (*set_rtc_time)(struct rtc_time *);
148 void (*get_rtc_time)(struct rtc_time *);
149 unsigned long (*get_boot_time)(void);
150 unsigned char (*rtc_read_val)(int addr);
151 void (*rtc_write_val)(int addr, unsigned char val);
152
153 void (*calibrate_decr)(void);
154
155 void (*progress)(char *, unsigned short);
156
157 /* Interface for platform error logging */
158 void (*log_error)(char *buf, unsigned int err_type, int fatal);
159
160 unsigned char (*nvram_read_val)(int addr);
161 void (*nvram_write_val)(int addr, unsigned char val);
162 ssize_t (*nvram_write)(char *buf, size_t count, loff_t *index);
163 ssize_t (*nvram_read)(char *buf, size_t count, loff_t *index);
164 ssize_t (*nvram_size)(void);
165 void (*nvram_sync)(void);
166
167 /* Exception handlers */
168 int (*system_reset_exception)(struct pt_regs *regs);
169 int (*machine_check_exception)(struct pt_regs *regs);
170 int (*handle_hmi_exception)(struct pt_regs *regs);
171
172 /* Early exception handlers called in realmode */
173 int (*hmi_exception_early)(struct pt_regs *regs);
174
175 /* Called during machine check exception to retrive fixup address. */
176 bool (*mce_check_early_recovery)(struct pt_regs *regs);
177
178 /* Motherboard/chipset features. This is a kind of general purpose
179 * hook used to control some machine specific features (like reset
180 * lines, chip power control, etc...).
181 */
182 long (*feature_call)(unsigned int feature, ...);
183
184 /* Get legacy PCI/IDE interrupt mapping */
185 int (*pci_get_legacy_ide_irq)(struct pci_dev *dev, int channel);
186
187 /* Get access protection for /dev/mem */
188 pgprot_t (*phys_mem_access_prot)(struct file *file,
189 unsigned long pfn,
190 unsigned long size,
191 pgprot_t vma_prot);
192
193 /*
194 * Function for waiting for work with reduced power in idle loop;
195 * called with interrupts disabled.
196 */
197 void (*power_save)(void);
198
199 /* Function to enable performance monitor counters for this
200 platform, called once per cpu. */
201 void (*enable_pmcs)(void);
202
203 /* Set DABR for this platform, leave empty for default implemenation */
204 int (*set_dabr)(unsigned long dabr,
205 unsigned long dabrx);
206
207 /* Set DAWR for this platform, leave empty for default implemenation */
208 int (*set_dawr)(unsigned long dawr,
209 unsigned long dawrx);
210
211 #ifdef CONFIG_PPC32 /* XXX for now */
212 /* A general init function, called by ppc_init in init/main.c.
213 May be NULL. */
214 void (*init)(void);
215
216 void (*kgdb_map_scc)(void);
217
218 /*
219 * optional PCI "hooks"
220 */
221 /* Called at then very end of pcibios_init() */
222 void (*pcibios_after_init)(void);
223
224 #endif /* CONFIG_PPC32 */
225
226 /* Called in indirect_* to avoid touching devices */
227 int (*pci_exclude_device)(struct pci_controller *, unsigned char, unsigned char);
228
229 /* Called after PPC generic resource fixup to perform
230 machine specific fixups */
231 void (*pcibios_fixup_resources)(struct pci_dev *);
232
233 /* Called for each PCI bus in the system when it's probed */
234 void (*pcibios_fixup_bus)(struct pci_bus *);
235
236 /* Called after scan and before resource survey */
237 void (*pcibios_fixup_phb)(struct pci_controller *hose);
238
239 #ifdef CONFIG_PCI_IOV
240 void (*pcibios_fixup_sriov)(struct pci_dev *pdev);
241 resource_size_t (*pcibios_iov_resource_alignment)(struct pci_dev *, int resno);
242 #endif /* CONFIG_PCI_IOV */
243
244 /* Called to shutdown machine specific hardware not already controlled
245 * by other drivers.
246 */
247 void (*machine_shutdown)(void);
248
249 #ifdef CONFIG_KEXEC
250 void (*kexec_cpu_down)(int crash_shutdown, int secondary);
251
252 /* Called to do what every setup is needed on image and the
253 * reboot code buffer. Returns 0 on success.
254 * Provide your own (maybe dummy) implementation if your platform
255 * claims to support kexec.
256 */
257 int (*machine_kexec_prepare)(struct kimage *image);
258
259 /* Called to perform the _real_ kexec.
260 * Do NOT allocate memory or fail here. We are past the point of
261 * no return.
262 */
263 void (*machine_kexec)(struct kimage *image);
264 #endif /* CONFIG_KEXEC */
265
266 #ifdef CONFIG_SUSPEND
267 /* These are called to disable and enable, respectively, IRQs when
268 * entering a suspend state. If NULL, then the generic versions
269 * will be called. The generic versions disable/enable the
270 * decrementer along with interrupts.
271 */
272 void (*suspend_disable_irqs)(void);
273 void (*suspend_enable_irqs)(void);
274 #endif
275 int (*suspend_disable_cpu)(void);
276
277 #ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
278 ssize_t (*cpu_probe)(const char *, size_t);
279 ssize_t (*cpu_release)(const char *, size_t);
280 #endif
281
282 #ifdef CONFIG_ARCH_RANDOM
283 int (*get_random_long)(unsigned long *v);
284 #endif
285 };
286
287 extern void e500_idle(void);
288 extern void power4_idle(void);
289 extern void power7_idle(void);
290 extern void ppc6xx_idle(void);
291 extern void book3e_idle(void);
292
293 /*
294 * ppc_md contains a copy of the machine description structure for the
295 * current platform. machine_id contains the initial address where the
296 * description was found during boot.
297 */
298 extern struct machdep_calls ppc_md;
299 extern struct machdep_calls *machine_id;
300
301 #define __machine_desc __attribute__ ((__section__ (".machine.desc")))
302
303 #define define_machine(name) \
304 extern struct machdep_calls mach_##name; \
305 EXPORT_SYMBOL(mach_##name); \
306 struct machdep_calls mach_##name __machine_desc =
307
308 #define machine_is(name) \
309 ({ \
310 extern struct machdep_calls mach_##name \
311 __attribute__((weak)); \
312 machine_id == &mach_##name; \
313 })
314
315 extern void probe_machine(void);
316
317 #ifdef CONFIG_PPC_PMAC
318 /*
319 * Power macintoshes have either a CUDA, PMU or SMU controlling
320 * system reset, power, NVRAM, RTC.
321 */
322 typedef enum sys_ctrler_kind {
323 SYS_CTRLER_UNKNOWN = 0,
324 SYS_CTRLER_CUDA = 1,
325 SYS_CTRLER_PMU = 2,
326 SYS_CTRLER_SMU = 3,
327 } sys_ctrler_t;
328 extern sys_ctrler_t sys_ctrler;
329
330 #endif /* CONFIG_PPC_PMAC */
331
log_error(char * buf,unsigned int err_type,int fatal)332 static inline void log_error(char *buf, unsigned int err_type, int fatal)
333 {
334 if (ppc_md.log_error)
335 ppc_md.log_error(buf, err_type, fatal);
336 }
337
338 #define __define_machine_initcall(mach, fn, id) \
339 static int __init __machine_initcall_##mach##_##fn(void) { \
340 if (machine_is(mach)) return fn(); \
341 return 0; \
342 } \
343 __define_initcall(__machine_initcall_##mach##_##fn, id);
344
345 #define machine_early_initcall(mach, fn) __define_machine_initcall(mach, fn, early)
346 #define machine_core_initcall(mach, fn) __define_machine_initcall(mach, fn, 1)
347 #define machine_core_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 1s)
348 #define machine_postcore_initcall(mach, fn) __define_machine_initcall(mach, fn, 2)
349 #define machine_postcore_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 2s)
350 #define machine_arch_initcall(mach, fn) __define_machine_initcall(mach, fn, 3)
351 #define machine_arch_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 3s)
352 #define machine_subsys_initcall(mach, fn) __define_machine_initcall(mach, fn, 4)
353 #define machine_subsys_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 4s)
354 #define machine_fs_initcall(mach, fn) __define_machine_initcall(mach, fn, 5)
355 #define machine_fs_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 5s)
356 #define machine_rootfs_initcall(mach, fn) __define_machine_initcall(mach, fn, rootfs)
357 #define machine_device_initcall(mach, fn) __define_machine_initcall(mach, fn, 6)
358 #define machine_device_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 6s)
359 #define machine_late_initcall(mach, fn) __define_machine_initcall(mach, fn, 7)
360 #define machine_late_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 7s)
361
362 #endif /* __KERNEL__ */
363 #endif /* _ASM_POWERPC_MACHDEP_H */
364