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
16#include <asm/setup.h>
17
18/* We export this macro for external modules like Alsa to know if
19 * ppc_md.feature_call is implemented or not
20 */
21#define CONFIG_PPC_HAS_FEATURE_CALLS
22
23struct pt_regs;
24struct pci_bus;
25struct device_node;
26struct iommu_table;
27struct rtc_time;
28struct file;
29struct pci_controller;
30#ifdef CONFIG_KEXEC
31struct kimage;
32#endif
33
34#ifdef CONFIG_SMP
35struct smp_ops_t {
36	void  (*message_pass)(int target, int msg);
37	int   (*probe)(void);
38	void  (*kick_cpu)(int nr);
39	void  (*setup_cpu)(int nr);
40	void  (*take_timebase)(void);
41	void  (*give_timebase)(void);
42	int   (*cpu_enable)(unsigned int nr);
43	int   (*cpu_disable)(void);
44	void  (*cpu_die)(unsigned int nr);
45	int   (*cpu_bootable)(unsigned int nr);
46};
47#endif
48
49struct machdep_calls {
50	char		*name;
51#ifdef CONFIG_PPC64
52	void            (*hpte_invalidate)(unsigned long slot,
53					   unsigned long va,
54					   int psize,
55					   int local);
56	long		(*hpte_updatepp)(unsigned long slot,
57					 unsigned long newpp,
58					 unsigned long va,
59					 int pize,
60					 int local);
61	void            (*hpte_updateboltedpp)(unsigned long newpp,
62					       unsigned long ea,
63					       int psize);
64	long		(*hpte_insert)(unsigned long hpte_group,
65				       unsigned long va,
66				       unsigned long prpn,
67				       unsigned long rflags,
68				       unsigned long vflags,
69				       int psize);
70	long		(*hpte_remove)(unsigned long hpte_group);
71	void		(*flush_hash_range)(unsigned long number, int local);
72
73	/* special for kexec, to be called in real mode, linar mapping is
74	 * destroyed as well */
75	void		(*hpte_clear_all)(void);
76
77	void		(*tce_build)(struct iommu_table * tbl,
78				     long index,
79				     long npages,
80				     unsigned long uaddr,
81				     enum dma_data_direction direction);
82	void		(*tce_free)(struct iommu_table *tbl,
83				    long index,
84				    long npages);
85	unsigned long	(*tce_get)(struct iommu_table *tbl,
86				    long index);
87	void		(*tce_flush)(struct iommu_table *tbl);
88	void		(*pci_dma_dev_setup)(struct pci_dev *dev);
89	void		(*pci_dma_bus_setup)(struct pci_bus *bus);
90
91	void __iomem *	(*ioremap)(phys_addr_t addr, unsigned long size,
92				   unsigned long flags);
93	void		(*iounmap)(volatile void __iomem *token);
94
95#ifdef CONFIG_PM
96	void		(*iommu_save)(void);
97	void		(*iommu_restore)(void);
98#endif
99#endif /* CONFIG_PPC64 */
100
101	int		(*probe)(void);
102	void		(*setup_arch)(void);
103	void		(*init_early)(void);
104	/* Optional, may be NULL. */
105	void		(*show_cpuinfo)(struct seq_file *m);
106	void		(*show_percpuinfo)(struct seq_file *m, int i);
107
108	void		(*init_IRQ)(void);
109	unsigned int	(*get_irq)(void);
110#ifdef CONFIG_KEXEC
111	void		(*kexec_cpu_down)(int crash_shutdown, int secondary);
112#endif
113
114	/* PCI stuff */
115	/* Called after scanning the bus, before allocating resources */
116	void		(*pcibios_fixup)(void);
117	int		(*pci_probe_mode)(struct pci_bus *);
118	void		(*pci_irq_fixup)(struct pci_dev *dev);
119
120	/* To setup PHBs when using automatic OF platform driver for PCI */
121	int		(*pci_setup_phb)(struct pci_controller *host);
122
123#ifdef CONFIG_PCI_MSI
124	int		(*msi_check_device)(struct pci_dev* dev,
125					    int nvec, int type);
126	int		(*setup_msi_irqs)(struct pci_dev *dev,
127					  int nvec, int type);
128	void		(*teardown_msi_irqs)(struct pci_dev *dev);
129#endif
130
131	void		(*restart)(char *cmd);
132	void		(*power_off)(void);
133	void		(*halt)(void);
134	void		(*panic)(char *str);
135	void		(*cpu_die)(void);
136
137	long		(*time_init)(void); /* Optional, may be NULL */
138
139	int		(*set_rtc_time)(struct rtc_time *);
140	void		(*get_rtc_time)(struct rtc_time *);
141	unsigned long	(*get_boot_time)(void);
142	unsigned char 	(*rtc_read_val)(int addr);
143	void		(*rtc_write_val)(int addr, unsigned char val);
144
145	void		(*calibrate_decr)(void);
146
147	void		(*progress)(char *, unsigned short);
148
149	/* Interface for platform error logging */
150	void 		(*log_error)(char *buf, unsigned int err_type, int fatal);
151
152	unsigned char 	(*nvram_read_val)(int addr);
153	void		(*nvram_write_val)(int addr, unsigned char val);
154	ssize_t		(*nvram_write)(char *buf, size_t count, loff_t *index);
155	ssize_t		(*nvram_read)(char *buf, size_t count, loff_t *index);
156	ssize_t		(*nvram_size)(void);
157	void		(*nvram_sync)(void);
158
159	/* Exception handlers */
160	int		(*system_reset_exception)(struct pt_regs *regs);
161	int 		(*machine_check_exception)(struct pt_regs *regs);
162
163	/* Motherboard/chipset features. This is a kind of general purpose
164	 * hook used to control some machine specific features (like reset
165	 * lines, chip power control, etc...).
166	 */
167	long	 	(*feature_call)(unsigned int feature, ...);
168
169	/* Get legacy PCI/IDE interrupt mapping */
170	int		(*pci_get_legacy_ide_irq)(struct pci_dev *dev, int channel);
171
172	/* Get access protection for /dev/mem */
173	pgprot_t	(*phys_mem_access_prot)(struct file *file,
174						unsigned long pfn,
175						unsigned long size,
176						pgprot_t vma_prot);
177
178	/* Idle loop for this platform, leave empty for default idle loop */
179	void		(*idle_loop)(void);
180
181	/*
182	 * Function for waiting for work with reduced power in idle loop;
183	 * called with interrupts disabled.
184	 */
185	void		(*power_save)(void);
186
187	/* Function to enable performance monitor counters for this
188	   platform, called once per cpu. */
189	void		(*enable_pmcs)(void);
190
191	/* Set DABR for this platform, leave empty for default implemenation */
192	int		(*set_dabr)(unsigned long dabr);
193
194#ifdef CONFIG_PPC32
195	/* A general init function, called by ppc_init in init/main.c.
196	   May be NULL. */
197	void		(*init)(void);
198
199	void		(*setup_io_mappings)(void);
200
201	void		(*early_serial_map)(void);
202	void		(*kgdb_map_scc)(void);
203
204	/*
205	 * optional PCI "hooks"
206	 */
207
208	/* Called after PPC generic resource fixup to perform
209	   machine specific fixups */
210	void (*pcibios_fixup_resources)(struct pci_dev *);
211
212	/* Called for each PCI bus in the system when it's probed */
213	void (*pcibios_fixup_bus)(struct pci_bus *);
214
215	/* Called when pci_enable_device() is called (initial=0) or
216	 * when a device with no assigned resource is found (initial=1).
217	 * Returns 0 to allow assignment/enabling of the device. */
218	int  (*pcibios_enable_device_hook)(struct pci_dev *, int initial);
219
220	/* Called in indirect_* to avoid touching devices */
221	int (*pci_exclude_device)(unsigned char, unsigned char);
222
223	/* Called at then very end of pcibios_init() */
224	void (*pcibios_after_init)(void);
225
226#endif /* CONFIG_PPC32 */
227
228	/* Called to shutdown machine specific hardware not already controlled
229	 * by other drivers.
230	 */
231	void (*machine_shutdown)(void);
232
233#ifdef CONFIG_KEXEC
234	void (*machine_crash_shutdown)(struct pt_regs *regs);
235
236	/* Called to do what every setup is needed on image and the
237	 * reboot code buffer. Returns 0 on success.
238	 * Provide your own (maybe dummy) implementation if your platform
239	 * claims to support kexec.
240	 */
241	int (*machine_kexec_prepare)(struct kimage *image);
242
243	/* Called to handle any machine specific cleanup on image */
244	void (*machine_kexec_cleanup)(struct kimage *image);
245
246	/* Called to perform the _real_ kexec.
247	 * Do NOT allocate memory or fail here. We are past the point of
248	 * no return.
249	 */
250	void (*machine_kexec)(struct kimage *image);
251#endif /* CONFIG_KEXEC */
252};
253
254extern void power4_idle(void);
255extern void power4_cpu_offline_powersave(void);
256extern void ppc6xx_idle(void);
257
258/*
259 * ppc_md contains a copy of the machine description structure for the
260 * current platform. machine_id contains the initial address where the
261 * description was found during boot.
262 */
263extern struct machdep_calls ppc_md;
264extern struct machdep_calls *machine_id;
265
266#define __machine_desc __attribute__ ((__section__ (".machine.desc")))
267
268#define define_machine(name)					\
269	extern struct machdep_calls mach_##name;		\
270	EXPORT_SYMBOL(mach_##name);				\
271	struct machdep_calls mach_##name __machine_desc =
272
273#define machine_is(name) \
274	({ \
275		extern struct machdep_calls mach_##name \
276			__attribute__((weak));		 \
277		machine_id == &mach_##name; \
278	})
279
280extern void probe_machine(void);
281
282extern char cmd_line[COMMAND_LINE_SIZE];
283
284#ifdef CONFIG_PPC_PMAC
285/*
286 * Power macintoshes have either a CUDA, PMU or SMU controlling
287 * system reset, power, NVRAM, RTC.
288 */
289typedef enum sys_ctrler_kind {
290	SYS_CTRLER_UNKNOWN = 0,
291	SYS_CTRLER_CUDA = 1,
292	SYS_CTRLER_PMU = 2,
293	SYS_CTRLER_SMU = 3,
294} sys_ctrler_t;
295extern sys_ctrler_t sys_ctrler;
296
297#endif /* CONFIG_PPC_PMAC */
298
299extern void setup_pci_ptrs(void);
300
301#ifdef CONFIG_SMP
302/* Poor default implementations */
303extern void __devinit smp_generic_give_timebase(void);
304extern void __devinit smp_generic_take_timebase(void);
305#endif /* CONFIG_SMP */
306
307
308/* Functions to produce codes on the leds.
309 * The SRC code should be unique for the message category and should
310 * be limited to the lower 24 bits (the upper 8 are set by these funcs),
311 * and (for boot & dump) should be sorted numerically in the order
312 * the events occur.
313 */
314/* Print a boot progress message. */
315void ppc64_boot_msg(unsigned int src, const char *msg);
316/* Print a termination message (print only -- does not stop the kernel) */
317void ppc64_terminate_msg(unsigned int src, const char *msg);
318
319static inline void log_error(char *buf, unsigned int err_type, int fatal)
320{
321	if (ppc_md.log_error)
322		ppc_md.log_error(buf, err_type, fatal);
323}
324
325#endif /* __KERNEL__ */
326#endif /* _ASM_POWERPC_MACHDEP_H */
327