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, int local);
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);
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 void (*pci_dma_dev_setup)(struct pci_dev *dev);
107 void (*pci_dma_bus_setup)(struct pci_bus *bus);
108
109 /* Platform set_dma_mask and dma_get_required_mask overrides */
110 int (*dma_set_mask)(struct device *dev, u64 dma_mask);
111 u64 (*dma_get_required_mask)(struct device *dev);
112
113 int (*probe)(void);
114 void (*setup_arch)(void); /* Optional, may be NULL */
115 void (*init_early)(void);
116 /* Optional, may be NULL. */
117 void (*show_cpuinfo)(struct seq_file *m);
118 void (*show_percpuinfo)(struct seq_file *m, int i);
119 /* Returns the current operating frequency of "cpu" in Hz */
120 unsigned long (*get_proc_freq)(unsigned int cpu);
121
122 void (*init_IRQ)(void);
123
124 /* Return an irq, or NO_IRQ to indicate there are none pending. */
125 unsigned int (*get_irq)(void);
126
127 /* PCI stuff */
128 /* Called after scanning the bus, before allocating resources */
129 void (*pcibios_fixup)(void);
130 int (*pci_probe_mode)(struct pci_bus *);
131 void (*pci_irq_fixup)(struct pci_dev *dev);
132 int (*pcibios_root_bridge_prepare)(struct pci_host_bridge
133 *bridge);
134
135 /* To setup PHBs when using automatic OF platform driver for PCI */
136 int (*pci_setup_phb)(struct pci_controller *host);
137
138 #ifdef CONFIG_PCI_MSI
139 int (*setup_msi_irqs)(struct pci_dev *dev,
140 int nvec, int type);
141 void (*teardown_msi_irqs)(struct pci_dev *dev);
142 #endif
143
144 void (*restart)(char *cmd);
145 void (*power_off)(void);
146 void (*halt)(void);
147 void (*panic)(char *str);
148 void (*cpu_die)(void);
149
150 long (*time_init)(void); /* Optional, may be NULL */
151
152 int (*set_rtc_time)(struct rtc_time *);
153 void (*get_rtc_time)(struct rtc_time *);
154 unsigned long (*get_boot_time)(void);
155 unsigned char (*rtc_read_val)(int addr);
156 void (*rtc_write_val)(int addr, unsigned char val);
157
158 void (*calibrate_decr)(void);
159
160 void (*progress)(char *, unsigned short);
161
162 /* Interface for platform error logging */
163 void (*log_error)(char *buf, unsigned int err_type, int fatal);
164
165 unsigned char (*nvram_read_val)(int addr);
166 void (*nvram_write_val)(int addr, unsigned char val);
167 ssize_t (*nvram_write)(char *buf, size_t count, loff_t *index);
168 ssize_t (*nvram_read)(char *buf, size_t count, loff_t *index);
169 ssize_t (*nvram_size)(void);
170 void (*nvram_sync)(void);
171
172 /* Exception handlers */
173 int (*system_reset_exception)(struct pt_regs *regs);
174 int (*machine_check_exception)(struct pt_regs *regs);
175 int (*handle_hmi_exception)(struct pt_regs *regs);
176
177 /* Early exception handlers called in realmode */
178 int (*hmi_exception_early)(struct pt_regs *regs);
179
180 /* Called during machine check exception to retrive fixup address. */
181 bool (*mce_check_early_recovery)(struct pt_regs *regs);
182
183 /* Motherboard/chipset features. This is a kind of general purpose
184 * hook used to control some machine specific features (like reset
185 * lines, chip power control, etc...).
186 */
187 long (*feature_call)(unsigned int feature, ...);
188
189 /* Get legacy PCI/IDE interrupt mapping */
190 int (*pci_get_legacy_ide_irq)(struct pci_dev *dev, int channel);
191
192 /* Get access protection for /dev/mem */
193 pgprot_t (*phys_mem_access_prot)(struct file *file,
194 unsigned long pfn,
195 unsigned long size,
196 pgprot_t vma_prot);
197
198 /*
199 * Function for waiting for work with reduced power in idle loop;
200 * called with interrupts disabled.
201 */
202 void (*power_save)(void);
203
204 /* Function to enable performance monitor counters for this
205 platform, called once per cpu. */
206 void (*enable_pmcs)(void);
207
208 /* Set DABR for this platform, leave empty for default implemenation */
209 int (*set_dabr)(unsigned long dabr,
210 unsigned long dabrx);
211
212 /* Set DAWR for this platform, leave empty for default implemenation */
213 int (*set_dawr)(unsigned long dawr,
214 unsigned long dawrx);
215
216 #ifdef CONFIG_PPC32 /* XXX for now */
217 /* A general init function, called by ppc_init in init/main.c.
218 May be NULL. */
219 void (*init)(void);
220
221 void (*kgdb_map_scc)(void);
222
223 /*
224 * optional PCI "hooks"
225 */
226 /* Called at then very end of pcibios_init() */
227 void (*pcibios_after_init)(void);
228
229 #endif /* CONFIG_PPC32 */
230
231 /* Called in indirect_* to avoid touching devices */
232 int (*pci_exclude_device)(struct pci_controller *, unsigned char, unsigned char);
233
234 /* Called after PPC generic resource fixup to perform
235 machine specific fixups */
236 void (*pcibios_fixup_resources)(struct pci_dev *);
237
238 /* Called for each PCI bus in the system when it's probed */
239 void (*pcibios_fixup_bus)(struct pci_bus *);
240
241 /* Called when pci_enable_device() is called. Returns 0 to
242 * allow assignment/enabling of the device. */
243 int (*pcibios_enable_device_hook)(struct pci_dev *);
244
245 /* Called after scan and before resource survey */
246 void (*pcibios_fixup_phb)(struct pci_controller *hose);
247
248 /* Called during PCI resource reassignment */
249 resource_size_t (*pcibios_window_alignment)(struct pci_bus *, unsigned long type);
250
251 /* Reset the secondary bus of bridge */
252 void (*pcibios_reset_secondary_bus)(struct pci_dev *dev);
253
254 /* Called to shutdown machine specific hardware not already controlled
255 * by other drivers.
256 */
257 void (*machine_shutdown)(void);
258
259 #ifdef CONFIG_KEXEC
260 void (*kexec_cpu_down)(int crash_shutdown, int secondary);
261
262 /* Called to do what every setup is needed on image and the
263 * reboot code buffer. Returns 0 on success.
264 * Provide your own (maybe dummy) implementation if your platform
265 * claims to support kexec.
266 */
267 int (*machine_kexec_prepare)(struct kimage *image);
268
269 /* Called to perform the _real_ kexec.
270 * Do NOT allocate memory or fail here. We are past the point of
271 * no return.
272 */
273 void (*machine_kexec)(struct kimage *image);
274 #endif /* CONFIG_KEXEC */
275
276 #ifdef CONFIG_SUSPEND
277 /* These are called to disable and enable, respectively, IRQs when
278 * entering a suspend state. If NULL, then the generic versions
279 * will be called. The generic versions disable/enable the
280 * decrementer along with interrupts.
281 */
282 void (*suspend_disable_irqs)(void);
283 void (*suspend_enable_irqs)(void);
284 #endif
285 int (*suspend_disable_cpu)(void);
286
287 #ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
288 ssize_t (*cpu_probe)(const char *, size_t);
289 ssize_t (*cpu_release)(const char *, size_t);
290 #endif
291
292 #ifdef CONFIG_ARCH_RANDOM
293 int (*get_random_long)(unsigned long *v);
294 #endif
295
296 #ifdef CONFIG_MEMORY_HOTREMOVE
297 int (*remove_memory)(u64, u64);
298 #endif
299 };
300
301 extern void e500_idle(void);
302 extern void power4_idle(void);
303 extern void power7_idle(void);
304 extern void ppc6xx_idle(void);
305 extern void book3e_idle(void);
306
307 /*
308 * ppc_md contains a copy of the machine description structure for the
309 * current platform. machine_id contains the initial address where the
310 * description was found during boot.
311 */
312 extern struct machdep_calls ppc_md;
313 extern struct machdep_calls *machine_id;
314
315 #define __machine_desc __attribute__ ((__section__ (".machine.desc")))
316
317 #define define_machine(name) \
318 extern struct machdep_calls mach_##name; \
319 EXPORT_SYMBOL(mach_##name); \
320 struct machdep_calls mach_##name __machine_desc =
321
322 #define machine_is(name) \
323 ({ \
324 extern struct machdep_calls mach_##name \
325 __attribute__((weak)); \
326 machine_id == &mach_##name; \
327 })
328
329 extern void probe_machine(void);
330
331 #ifdef CONFIG_PPC_PMAC
332 /*
333 * Power macintoshes have either a CUDA, PMU or SMU controlling
334 * system reset, power, NVRAM, RTC.
335 */
336 typedef enum sys_ctrler_kind {
337 SYS_CTRLER_UNKNOWN = 0,
338 SYS_CTRLER_CUDA = 1,
339 SYS_CTRLER_PMU = 2,
340 SYS_CTRLER_SMU = 3,
341 } sys_ctrler_t;
342 extern sys_ctrler_t sys_ctrler;
343
344 #endif /* CONFIG_PPC_PMAC */
345
346
347 /* Functions to produce codes on the leds.
348 * The SRC code should be unique for the message category and should
349 * be limited to the lower 24 bits (the upper 8 are set by these funcs),
350 * and (for boot & dump) should be sorted numerically in the order
351 * the events occur.
352 */
353 /* Print a boot progress message. */
354 void ppc64_boot_msg(unsigned int src, const char *msg);
355
log_error(char * buf,unsigned int err_type,int fatal)356 static inline void log_error(char *buf, unsigned int err_type, int fatal)
357 {
358 if (ppc_md.log_error)
359 ppc_md.log_error(buf, err_type, fatal);
360 }
361
362 #define __define_machine_initcall(mach, fn, id) \
363 static int __init __machine_initcall_##mach##_##fn(void) { \
364 if (machine_is(mach)) return fn(); \
365 return 0; \
366 } \
367 __define_initcall(__machine_initcall_##mach##_##fn, id);
368
369 #define machine_early_initcall(mach, fn) __define_machine_initcall(mach, fn, early)
370 #define machine_core_initcall(mach, fn) __define_machine_initcall(mach, fn, 1)
371 #define machine_core_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 1s)
372 #define machine_postcore_initcall(mach, fn) __define_machine_initcall(mach, fn, 2)
373 #define machine_postcore_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 2s)
374 #define machine_arch_initcall(mach, fn) __define_machine_initcall(mach, fn, 3)
375 #define machine_arch_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 3s)
376 #define machine_subsys_initcall(mach, fn) __define_machine_initcall(mach, fn, 4)
377 #define machine_subsys_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 4s)
378 #define machine_fs_initcall(mach, fn) __define_machine_initcall(mach, fn, 5)
379 #define machine_fs_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 5s)
380 #define machine_rootfs_initcall(mach, fn) __define_machine_initcall(mach, fn, rootfs)
381 #define machine_device_initcall(mach, fn) __define_machine_initcall(mach, fn, 6)
382 #define machine_device_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 6s)
383 #define machine_late_initcall(mach, fn) __define_machine_initcall(mach, fn, 7)
384 #define machine_late_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 7s)
385
386 #endif /* __KERNEL__ */
387 #endif /* _ASM_POWERPC_MACHDEP_H */
388