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 /*
65 * Special for kexec.
66 * To be called in real mode with interrupts disabled. No locks are
67 * taken as such, concurrent access on pre POWER5 hardware could result
68 * in a deadlock.
69 * The linear mapping is destroyed as well.
70 */
71 void (*hpte_clear_all)(void);
72
73 void __iomem * (*ioremap)(phys_addr_t addr, unsigned long size,
74 unsigned long flags, void *caller);
75 void (*iounmap)(volatile void __iomem *token);
76
77 #ifdef CONFIG_PM
78 void (*iommu_save)(void);
79 void (*iommu_restore)(void);
80 #endif
81 #ifdef CONFIG_MEMORY_HOTPLUG_SPARSE
82 unsigned long (*memory_block_size)(void);
83 #endif
84 #endif /* CONFIG_PPC64 */
85
86 /* Platform set_dma_mask and dma_get_required_mask overrides */
87 int (*dma_set_mask)(struct device *dev, u64 dma_mask);
88 u64 (*dma_get_required_mask)(struct device *dev);
89
90 int (*probe)(void);
91 void (*setup_arch)(void); /* Optional, may be NULL */
92 void (*init_early)(void);
93 /* Optional, may be NULL. */
94 void (*show_cpuinfo)(struct seq_file *m);
95 void (*show_percpuinfo)(struct seq_file *m, int i);
96 /* Returns the current operating frequency of "cpu" in Hz */
97 unsigned long (*get_proc_freq)(unsigned int cpu);
98
99 void (*init_IRQ)(void);
100
101 /* Return an irq, or NO_IRQ to indicate there are none pending. */
102 unsigned int (*get_irq)(void);
103
104 /* PCI stuff */
105 /* Called after allocating resources */
106 void (*pcibios_fixup)(void);
107 void (*pci_irq_fixup)(struct pci_dev *dev);
108 int (*pcibios_root_bridge_prepare)(struct pci_host_bridge
109 *bridge);
110
111 /* To setup PHBs when using automatic OF platform driver for PCI */
112 int (*pci_setup_phb)(struct pci_controller *host);
113
114 void (*restart)(char *cmd);
115 void (*halt)(void);
116 void (*panic)(char *str);
117 void (*cpu_die)(void);
118
119 long (*time_init)(void); /* Optional, may be NULL */
120
121 int (*set_rtc_time)(struct rtc_time *);
122 void (*get_rtc_time)(struct rtc_time *);
123 unsigned long (*get_boot_time)(void);
124 unsigned char (*rtc_read_val)(int addr);
125 void (*rtc_write_val)(int addr, unsigned char val);
126
127 void (*calibrate_decr)(void);
128
129 void (*progress)(char *, unsigned short);
130
131 /* Interface for platform error logging */
132 void (*log_error)(char *buf, unsigned int err_type, int fatal);
133
134 unsigned char (*nvram_read_val)(int addr);
135 void (*nvram_write_val)(int addr, unsigned char val);
136 ssize_t (*nvram_write)(char *buf, size_t count, loff_t *index);
137 ssize_t (*nvram_read)(char *buf, size_t count, loff_t *index);
138 ssize_t (*nvram_size)(void);
139 void (*nvram_sync)(void);
140
141 /* Exception handlers */
142 int (*system_reset_exception)(struct pt_regs *regs);
143 int (*machine_check_exception)(struct pt_regs *regs);
144 int (*handle_hmi_exception)(struct pt_regs *regs);
145
146 /* Early exception handlers called in realmode */
147 int (*hmi_exception_early)(struct pt_regs *regs);
148
149 /* Called during machine check exception to retrive fixup address. */
150 bool (*mce_check_early_recovery)(struct pt_regs *regs);
151
152 /* Motherboard/chipset features. This is a kind of general purpose
153 * hook used to control some machine specific features (like reset
154 * lines, chip power control, etc...).
155 */
156 long (*feature_call)(unsigned int feature, ...);
157
158 /* Get legacy PCI/IDE interrupt mapping */
159 int (*pci_get_legacy_ide_irq)(struct pci_dev *dev, int channel);
160
161 /* Get access protection for /dev/mem */
162 pgprot_t (*phys_mem_access_prot)(struct file *file,
163 unsigned long pfn,
164 unsigned long size,
165 pgprot_t vma_prot);
166
167 /*
168 * Function for waiting for work with reduced power in idle loop;
169 * called with interrupts disabled.
170 */
171 void (*power_save)(void);
172
173 /* Function to enable performance monitor counters for this
174 platform, called once per cpu. */
175 void (*enable_pmcs)(void);
176
177 /* Set DABR for this platform, leave empty for default implemenation */
178 int (*set_dabr)(unsigned long dabr,
179 unsigned long dabrx);
180
181 /* Set DAWR for this platform, leave empty for default implemenation */
182 int (*set_dawr)(unsigned long dawr,
183 unsigned long dawrx);
184
185 #ifdef CONFIG_PPC32 /* XXX for now */
186 /* A general init function, called by ppc_init in init/main.c.
187 May be NULL. */
188 void (*init)(void);
189
190 void (*kgdb_map_scc)(void);
191
192 /*
193 * optional PCI "hooks"
194 */
195 /* Called at then very end of pcibios_init() */
196 void (*pcibios_after_init)(void);
197
198 #endif /* CONFIG_PPC32 */
199
200 /* Called in indirect_* to avoid touching devices */
201 int (*pci_exclude_device)(struct pci_controller *, unsigned char, unsigned char);
202
203 /* Called after PPC generic resource fixup to perform
204 machine specific fixups */
205 void (*pcibios_fixup_resources)(struct pci_dev *);
206
207 /* Called for each PCI bus in the system when it's probed */
208 void (*pcibios_fixup_bus)(struct pci_bus *);
209
210 /* Called after scan and before resource survey */
211 void (*pcibios_fixup_phb)(struct pci_controller *hose);
212
213 #ifdef CONFIG_PCI_IOV
214 void (*pcibios_fixup_sriov)(struct pci_dev *pdev);
215 resource_size_t (*pcibios_iov_resource_alignment)(struct pci_dev *, int resno);
216 #endif /* CONFIG_PCI_IOV */
217
218 /* Called to shutdown machine specific hardware not already controlled
219 * by other drivers.
220 */
221 void (*machine_shutdown)(void);
222
223 #ifdef CONFIG_KEXEC
224 void (*kexec_cpu_down)(int crash_shutdown, int secondary);
225
226 /* Called to do what every setup is needed on image and the
227 * reboot code buffer. Returns 0 on success.
228 * Provide your own (maybe dummy) implementation if your platform
229 * claims to support kexec.
230 */
231 int (*machine_kexec_prepare)(struct kimage *image);
232
233 /* Called to perform the _real_ kexec.
234 * Do NOT allocate memory or fail here. We are past the point of
235 * no return.
236 */
237 void (*machine_kexec)(struct kimage *image);
238 #endif /* CONFIG_KEXEC */
239
240 #ifdef CONFIG_SUSPEND
241 /* These are called to disable and enable, respectively, IRQs when
242 * entering a suspend state. If NULL, then the generic versions
243 * will be called. The generic versions disable/enable the
244 * decrementer along with interrupts.
245 */
246 void (*suspend_disable_irqs)(void);
247 void (*suspend_enable_irqs)(void);
248 #endif
249 int (*suspend_disable_cpu)(void);
250
251 #ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
252 ssize_t (*cpu_probe)(const char *, size_t);
253 ssize_t (*cpu_release)(const char *, size_t);
254 #endif
255
256 #ifdef CONFIG_ARCH_RANDOM
257 int (*get_random_seed)(unsigned long *v);
258 #endif
259 };
260
261 extern void e500_idle(void);
262 extern void power4_idle(void);
263 extern void power7_idle(void);
264 extern void ppc6xx_idle(void);
265 extern void book3e_idle(void);
266
267 /*
268 * ppc_md contains a copy of the machine description structure for the
269 * current platform. machine_id contains the initial address where the
270 * description was found during boot.
271 */
272 extern struct machdep_calls ppc_md;
273 extern struct machdep_calls *machine_id;
274
275 #define __machine_desc __attribute__ ((__section__ (".machine.desc")))
276
277 #define define_machine(name) \
278 extern struct machdep_calls mach_##name; \
279 EXPORT_SYMBOL(mach_##name); \
280 struct machdep_calls mach_##name __machine_desc =
281
282 #define machine_is(name) \
283 ({ \
284 extern struct machdep_calls mach_##name \
285 __attribute__((weak)); \
286 machine_id == &mach_##name; \
287 })
288
289 extern void probe_machine(void);
290
291 #ifdef CONFIG_PPC_PMAC
292 /*
293 * Power macintoshes have either a CUDA, PMU or SMU controlling
294 * system reset, power, NVRAM, RTC.
295 */
296 typedef enum sys_ctrler_kind {
297 SYS_CTRLER_UNKNOWN = 0,
298 SYS_CTRLER_CUDA = 1,
299 SYS_CTRLER_PMU = 2,
300 SYS_CTRLER_SMU = 3,
301 } sys_ctrler_t;
302 extern sys_ctrler_t sys_ctrler;
303
304 #endif /* CONFIG_PPC_PMAC */
305
log_error(char * buf,unsigned int err_type,int fatal)306 static inline void log_error(char *buf, unsigned int err_type, int fatal)
307 {
308 if (ppc_md.log_error)
309 ppc_md.log_error(buf, err_type, fatal);
310 }
311
312 #define __define_machine_initcall(mach, fn, id) \
313 static int __init __machine_initcall_##mach##_##fn(void) { \
314 if (machine_is(mach)) return fn(); \
315 return 0; \
316 } \
317 __define_initcall(__machine_initcall_##mach##_##fn, id);
318
319 #define machine_early_initcall(mach, fn) __define_machine_initcall(mach, fn, early)
320 #define machine_core_initcall(mach, fn) __define_machine_initcall(mach, fn, 1)
321 #define machine_core_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 1s)
322 #define machine_postcore_initcall(mach, fn) __define_machine_initcall(mach, fn, 2)
323 #define machine_postcore_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 2s)
324 #define machine_arch_initcall(mach, fn) __define_machine_initcall(mach, fn, 3)
325 #define machine_arch_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 3s)
326 #define machine_subsys_initcall(mach, fn) __define_machine_initcall(mach, fn, 4)
327 #define machine_subsys_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 4s)
328 #define machine_fs_initcall(mach, fn) __define_machine_initcall(mach, fn, 5)
329 #define machine_fs_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 5s)
330 #define machine_rootfs_initcall(mach, fn) __define_machine_initcall(mach, fn, rootfs)
331 #define machine_device_initcall(mach, fn) __define_machine_initcall(mach, fn, 6)
332 #define machine_device_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 6s)
333 #define machine_late_initcall(mach, fn) __define_machine_initcall(mach, fn, 7)
334 #define machine_late_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 7s)
335
336 #endif /* __KERNEL__ */
337 #endif /* _ASM_POWERPC_MACHDEP_H */
338