aboutsummaryrefslogtreecommitdiff
path: root/arch/powerpc/include/asm/machdep.h
blob: c43d6eca9eddefc1fed4566606aae4c143ae91ea (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
/* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef _ASM_POWERPC_MACHDEP_H
#define _ASM_POWERPC_MACHDEP_H
#ifdef __KERNEL__

/*
 */

#include <linux/seq_file.h>
#include <linux/init.h>
#include <linux/dma-mapping.h>
#include <linux/export.h>

#include <asm/setup.h>

/* We export this macro for external modules like Alsa to know if
 * ppc_md.feature_call is implemented or not
 */
#define CONFIG_PPC_HAS_FEATURE_CALLS

struct pt_regs;
struct pci_bus;	
struct device_node;
struct iommu_table;
struct rtc_time;
struct file;
struct pci_controller;
struct kimage;
struct pci_host_bridge;

struct machdep_calls {
	char		*name;
#ifdef CONFIG_PPC64
	void __iomem *	(*ioremap)(phys_addr_t addr, unsigned long size,
				   pgprot_t prot, void *caller);
	void		(*iounmap)(volatile void __iomem *token);

#ifdef CONFIG_PM
	void		(*iommu_save)(void);
	void		(*iommu_restore)(void);
#endif
#ifdef CONFIG_MEMORY_HOTPLUG_SPARSE
	unsigned long	(*memory_block_size)(void);
#endif
#endif /* CONFIG_PPC64 */

	void		(*dma_set_mask)(struct device *dev, u64 dma_mask);

	int		(*probe)(void);
	void		(*setup_arch)(void); /* Optional, may be NULL */
	/* Optional, may be NULL. */
	void		(*show_cpuinfo)(struct seq_file *m);
	void		(*show_percpuinfo)(struct seq_file *m, int i);
	/* Returns the current operating frequency of "cpu" in Hz */
	unsigned long  	(*get_proc_freq)(unsigned int cpu);

	void		(*init_IRQ)(void);

	/* Return an irq, or 0 to indicate there are none pending. */
	unsigned int	(*get_irq)(void);

	/* PCI stuff */
	/* Called after allocating resources */
	void		(*pcibios_fixup)(void);
	void		(*pci_irq_fixup)(struct pci_dev *dev);
	int		(*pcibios_root_bridge_prepare)(struct pci_host_bridge
				*bridge);

	/* To setup PHBs when using automatic OF platform driver for PCI */
	int		(*pci_setup_phb)(struct pci_controller *host);

	void __noreturn	(*restart)(char *cmd);
	void __noreturn (*halt)(void);
	void		(*panic)(char *str);
	void		(*cpu_die)(void);

	long		(*time_init)(void); /* Optional, may be NULL */

	int		(*set_rtc_time)(struct rtc_time *);
	void		(*get_rtc_time)(struct rtc_time *);
	time64_t	(*get_boot_time)(void);
	unsigned char 	(*rtc_read_val)(int addr);
	void		(*rtc_write_val)(int addr, unsigned char val);

	void		(*calibrate_decr)(void);

	void		(*progress)(char *, unsigned short);

	/* Interface for platform error logging */
	void 		(*log_error)(char *buf, unsigned int err_type, int fatal);

	unsigned char 	(*nvram_read_val)(int addr);
	void		(*nvram_write_val)(int addr, unsigned char val);
	ssize_t		(*nvram_write)(char *buf, size_t count, loff_t *index);
	ssize_t		(*nvram_read)(char *buf, size_t count, loff_t *index);	
	ssize_t		(*nvram_size)(void);		
	void		(*nvram_sync)(void);

	/* Exception handlers */
	int		(*system_reset_exception)(struct pt_regs *regs);
	int 		(*machine_check_exception)(struct pt_regs *regs);
	int		(*handle_hmi_exception)(struct pt_regs *regs);

	/* Early exception handlers called in realmode */
	int		(*hmi_exception_early)(struct pt_regs *regs);
	long		(*machine_check_early)(struct pt_regs *regs);

	/* Called during machine check exception to retrive fixup address. */
	bool		(*mce_check_early_recovery)(struct pt_regs *regs);

	/* Motherboard/chipset features. This is a kind of general purpose
	 * hook used to control some machine specific features (like reset
	 * lines, chip power control, etc...).
	 */
	long	 	(*feature_call)(unsigned int feature, ...);

	/* Get legacy PCI/IDE interrupt mapping */ 
	int		(*pci_get_legacy_ide_irq)(struct pci_dev *dev, int channel);
	
	/* Get access protection for /dev/mem */
	pgprot_t	(*phys_mem_access_prot)(struct file *file,
						unsigned long pfn,
						unsigned long size,
						pgprot_t vma_prot);

	/*
	 * Function for waiting for work with reduced power in idle loop;
	 * called with interrupts disabled.
	 */
	void		(*power_save)(void);

	/* Function to enable performance monitor counters for this
	   platform, called once per cpu. */
	void		(*enable_pmcs)(void);

	/* Set DABR for this platform, leave empty for default implementation */
	int		(*set_dabr)(unsigned long dabr,
				    unsigned long dabrx);

	/* Set DAWR for this platform, leave empty for default implementation */
	int		(*set_dawr)(unsigned long dawr,
				    unsigned long dawrx);

#ifdef CONFIG_PPC32	/* XXX for now */
	/* A general init function, called by ppc_init in init/main.c.
	   May be NULL. */
	void		(*init)(void);

	void		(*kgdb_map_scc)(void);

	/*
	 * optional PCI "hooks"
	 */
	/* Called at then very end of pcibios_init() */
	void (*pcibios_after_init)(void);

#endif /* CONFIG_PPC32 */

	/* Called in indirect_* to avoid touching devices */
	int (*pci_exclude_device)(struct pci_controller *, unsigned char, unsigned char);

	/* Called after PPC generic resource fixup to perform
	   machine specific fixups */
	void (*pcibios_fixup_resources)(struct pci_dev *);

	/* Called for each PCI bus in the system when it's probed */
	void (*pcibios_fixup_bus)(struct pci_bus *);

	/* Called after scan and before resource survey */
	void (*pcibios_fixup_phb)(struct pci_controller *hose);

	/*
	 * Called after device has been added to bus and
	 * before sysfs has been created.
	 */
	void (*pcibios_bus_add_device)(struct pci_dev *pdev);

	resource_size_t (*pcibios_default_alignment)(void);

#ifdef CONFIG_PCI_IOV
	void (*pcibios_fixup_sriov)(struct pci_dev *pdev);
	resource_size_t (*pcibios_iov_resource_alignment)(struct pci_dev *, int resno);
	int (*pcibios_sriov_enable)(struct pci_dev *pdev, u16 num_vfs);
	int (*pcibios_sriov_disable)(struct pci_dev *pdev);
#endif /* CONFIG_PCI_IOV */

	/* Called to shutdown machine specific hardware not already controlled
	 * by other drivers.
	 */
	void (*machine_shutdown)(void);

#ifdef CONFIG_KEXEC_CORE
	void (*kexec_cpu_down)(int crash_shutdown, int secondary);

	/* Called to do what every setup is needed on image and the
	 * reboot code buffer. Returns 0 on success.
	 * Provide your own (maybe dummy) implementation if your platform
	 * claims to support kexec.
	 */
	int (*machine_kexec_prepare)(struct kimage *image);

	/* Called to perform the _real_ kexec.
	 * Do NOT allocate memory or fail here. We are past the point of
	 * no return.
	 */
	void (*machine_kexec)(struct kimage *image);
#endif /* CONFIG_KEXEC_CORE */

#ifdef CONFIG_SUSPEND
	/* These are called to disable and enable, respectively, IRQs when
	 * entering a suspend state.  If NULL, then the generic versions
	 * will be called.  The generic versions disable/enable the
	 * decrementer along with interrupts.
	 */
	void (*suspend_disable_irqs)(void);
	void (*suspend_enable_irqs)(void);
#endif
	int (*suspend_disable_cpu)(void);

#ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
	ssize_t (*cpu_probe)(const char *, size_t);
	ssize_t (*cpu_release)(const char *, size_t);
#endif

#ifdef CONFIG_ARCH_RANDOM
	int (*get_random_seed)(unsigned long *v);
#endif
};

extern void e500_idle(void);
extern void power4_idle(void);
extern void power7_idle(void);
extern void power9_idle(void);
extern void ppc6xx_idle(void);
extern void book3e_idle(void);

/*
 * ppc_md contains a copy of the machine description structure for the
 * current platform. machine_id contains the initial address where the
 * description was found during boot.
 */
extern struct machdep_calls ppc_md;
extern struct machdep_calls *machine_id;

#define __machine_desc __attribute__ ((__section__ (".machine.desc")))

#define define_machine(name)					\
	extern struct machdep_calls mach_##name;		\
	EXPORT_SYMBOL(mach_##name);				\
	struct machdep_calls mach_##name __machine_desc =

#define machine_is(name) \
	({ \
		extern struct machdep_calls mach_##name \
			__attribute__((weak));		 \
		machine_id == &mach_##name; \
	})

extern void probe_machine(void);

#ifdef CONFIG_PPC_PMAC
/*
 * Power macintoshes have either a CUDA, PMU or SMU controlling
 * system reset, power, NVRAM, RTC.
 */
typedef enum sys_ctrler_kind {
	SYS_CTRLER_UNKNOWN = 0,
	SYS_CTRLER_CUDA = 1,
	SYS_CTRLER_PMU = 2,
	SYS_CTRLER_SMU = 3,
} sys_ctrler_t;
extern sys_ctrler_t sys_ctrler;

#endif /* CONFIG_PPC_PMAC */

static inline void log_error(char *buf, unsigned int err_type, int fatal)
{
	if (ppc_md.log_error)
		ppc_md.log_error(buf, err_type, fatal);
}

#define __define_machine_initcall(mach, fn, id) \
	static int __init __machine_initcall_##mach##_##fn(void) { \
		if (machine_is(mach)) return fn(); \
		return 0; \
	} \
	__define_initcall(__machine_initcall_##mach##_##fn, id);

#define machine_early_initcall(mach, fn)	__define_machine_initcall(mach, fn, early)
#define machine_core_initcall(mach, fn)		__define_machine_initcall(mach, fn, 1)
#define machine_core_initcall_sync(mach, fn)	__define_machine_initcall(mach, fn, 1s)
#define machine_postcore_initcall(mach, fn)	__define_machine_initcall(mach, fn, 2)
#define machine_postcore_initcall_sync(mach, fn)	__define_machine_initcall(mach, fn, 2s)
#define machine_arch_initcall(mach, fn)		__define_machine_initcall(mach, fn, 3)
#define machine_arch_initcall_sync(mach, fn)	__define_machine_initcall(mach, fn, 3s)
#define machine_subsys_initcall(mach, fn)	__define_machine_initcall(mach, fn, 4)
#define machine_subsys_initcall_sync(mach, fn)	__define_machine_initcall(mach, fn, 4s)
#define machine_fs_initcall(mach, fn)		__define_machine_initcall(mach, fn, 5)
#define machine_fs_initcall_sync(mach, fn)	__define_machine_initcall(mach, fn, 5s)
#define machine_rootfs_initcall(mach, fn)	__define_machine_initcall(mach, fn, rootfs)
#define machine_device_initcall(mach, fn)	__define_machine_initcall(mach, fn, 6)
#define machine_device_initcall_sync(mach, fn)	__define_machine_initcall(mach, fn, 6s)
#define machine_late_initcall(mach, fn)		__define_machine_initcall(mach, fn, 7)
#define machine_late_initcall_sync(mach, fn)	__define_machine_initcall(mach, fn, 7s)

#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_MACHDEP_H */