1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 #ifndef _ASM_POWERPC_MACHDEP_H
3 #define _ASM_POWERPC_MACHDEP_H
6 #include <linux/seq_file.h>
7 #include <linux/init.h>
8 #include <linux/dma-mapping.h>
9 #include <linux/export.h>
11 #include <asm/setup.h>
13 /* We export this macro for external modules like Alsa to know if
14 * ppc_md.feature_call is implemented or not
16 #define CONFIG_PPC_HAS_FEATURE_CALLS
24 struct pci_controller;
26 struct pci_host_bridge;
28 struct machdep_calls {
32 void (*iommu_save)(void);
33 void (*iommu_restore)(void);
35 #ifdef CONFIG_MEMORY_HOTPLUG_SPARSE
36 unsigned long (*memory_block_size)(void);
38 #endif /* CONFIG_PPC64 */
40 void (*dma_set_mask)(struct device *dev, u64 dma_mask);
43 void (*setup_arch)(void); /* Optional, may be NULL */
44 /* Optional, may be NULL. */
45 void (*show_cpuinfo)(struct seq_file *m);
46 void (*show_percpuinfo)(struct seq_file *m, int i);
47 /* Returns the current operating frequency of "cpu" in Hz */
48 unsigned long (*get_proc_freq)(unsigned int cpu);
50 void (*init_IRQ)(void);
52 /* Return an irq, or 0 to indicate there are none pending. */
53 unsigned int (*get_irq)(void);
56 /* Called after allocating resources */
57 void (*pcibios_fixup)(void);
58 void (*pci_irq_fixup)(struct pci_dev *dev);
59 int (*pcibios_root_bridge_prepare)(struct pci_host_bridge
62 /* finds all the pci_controllers present at boot */
63 void (*discover_phbs)(void);
65 /* To setup PHBs when using automatic OF platform driver for PCI */
66 int (*pci_setup_phb)(struct pci_controller *host);
68 void __noreturn (*restart)(char *cmd);
69 void __noreturn (*halt)(void);
70 void (*panic)(char *str);
71 void (*cpu_die)(void);
73 long (*time_init)(void); /* Optional, may be NULL */
75 int (*set_rtc_time)(struct rtc_time *);
76 void (*get_rtc_time)(struct rtc_time *);
77 time64_t (*get_boot_time)(void);
78 unsigned char (*rtc_read_val)(int addr);
79 void (*rtc_write_val)(int addr, unsigned char val);
81 void (*calibrate_decr)(void);
83 void (*progress)(char *, unsigned short);
85 /* Interface for platform error logging */
86 void (*log_error)(char *buf, unsigned int err_type, int fatal);
88 unsigned char (*nvram_read_val)(int addr);
89 void (*nvram_write_val)(int addr, unsigned char val);
90 ssize_t (*nvram_write)(char *buf, size_t count, loff_t *index);
91 ssize_t (*nvram_read)(char *buf, size_t count, loff_t *index);
92 ssize_t (*nvram_size)(void);
93 void (*nvram_sync)(void);
95 /* Exception handlers */
96 int (*system_reset_exception)(struct pt_regs *regs);
97 int (*machine_check_exception)(struct pt_regs *regs);
98 int (*handle_hmi_exception)(struct pt_regs *regs);
100 /* Early exception handlers called in realmode */
101 int (*hmi_exception_early)(struct pt_regs *regs);
102 long (*machine_check_early)(struct pt_regs *regs);
104 /* Called during machine check exception to retrive fixup address. */
105 bool (*mce_check_early_recovery)(struct pt_regs *regs);
107 /* Motherboard/chipset features. This is a kind of general purpose
108 * hook used to control some machine specific features (like reset
109 * lines, chip power control, etc...).
111 long (*feature_call)(unsigned int feature, ...);
113 /* Get legacy PCI/IDE interrupt mapping */
114 int (*pci_get_legacy_ide_irq)(struct pci_dev *dev, int channel);
116 /* Get access protection for /dev/mem */
117 pgprot_t (*phys_mem_access_prot)(struct file *file,
123 * Function for waiting for work with reduced power in idle loop;
124 * called with interrupts disabled.
126 void (*power_save)(void);
128 /* Function to enable performance monitor counters for this
129 platform, called once per cpu. */
130 void (*enable_pmcs)(void);
132 /* Set DABR for this platform, leave empty for default implementation */
133 int (*set_dabr)(unsigned long dabr,
134 unsigned long dabrx);
136 /* Set DAWR for this platform, leave empty for default implementation */
137 int (*set_dawr)(unsigned long dawr,
138 unsigned long dawrx);
140 #ifdef CONFIG_PPC32 /* XXX for now */
141 /* A general init function, called by ppc_init in init/main.c.
145 void (*kgdb_map_scc)(void);
148 * optional PCI "hooks"
150 /* Called at then very end of pcibios_init() */
151 void (*pcibios_after_init)(void);
153 #endif /* CONFIG_PPC32 */
155 /* Called in indirect_* to avoid touching devices */
156 int (*pci_exclude_device)(struct pci_controller *, unsigned char, unsigned char);
158 /* Called after PPC generic resource fixup to perform
159 machine specific fixups */
160 void (*pcibios_fixup_resources)(struct pci_dev *);
162 /* Called for each PCI bus in the system when it's probed */
163 void (*pcibios_fixup_bus)(struct pci_bus *);
165 /* Called after scan and before resource survey */
166 void (*pcibios_fixup_phb)(struct pci_controller *hose);
169 * Called after device has been added to bus and
170 * before sysfs has been created.
172 void (*pcibios_bus_add_device)(struct pci_dev *pdev);
174 resource_size_t (*pcibios_default_alignment)(void);
176 #ifdef CONFIG_PCI_IOV
177 void (*pcibios_fixup_sriov)(struct pci_dev *pdev);
178 resource_size_t (*pcibios_iov_resource_alignment)(struct pci_dev *, int resno);
179 int (*pcibios_sriov_enable)(struct pci_dev *pdev, u16 num_vfs);
180 int (*pcibios_sriov_disable)(struct pci_dev *pdev);
181 #endif /* CONFIG_PCI_IOV */
183 /* Called to shutdown machine specific hardware not already controlled
186 void (*machine_shutdown)(void);
188 #ifdef CONFIG_KEXEC_CORE
189 void (*kexec_cpu_down)(int crash_shutdown, int secondary);
191 /* Called to do what every setup is needed on image and the
192 * reboot code buffer. Returns 0 on success.
193 * Provide your own (maybe dummy) implementation if your platform
194 * claims to support kexec.
196 int (*machine_kexec_prepare)(struct kimage *image);
198 /* Called to perform the _real_ kexec.
199 * Do NOT allocate memory or fail here. We are past the point of
202 void (*machine_kexec)(struct kimage *image);
203 #endif /* CONFIG_KEXEC_CORE */
205 #ifdef CONFIG_SUSPEND
206 /* These are called to disable and enable, respectively, IRQs when
207 * entering a suspend state. If NULL, then the generic versions
208 * will be called. The generic versions disable/enable the
209 * decrementer along with interrupts.
211 void (*suspend_disable_irqs)(void);
212 void (*suspend_enable_irqs)(void);
214 int (*suspend_disable_cpu)(void);
216 #ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
217 ssize_t (*cpu_probe)(const char *, size_t);
218 ssize_t (*cpu_release)(const char *, size_t);
221 #ifdef CONFIG_ARCH_RANDOM
222 int (*get_random_seed)(unsigned long *v);
226 extern void e500_idle(void);
227 extern void power4_idle(void);
228 extern void power7_idle(void);
229 extern void power9_idle(void);
230 extern void ppc6xx_idle(void);
231 extern void book3e_idle(void);
234 * ppc_md contains a copy of the machine description structure for the
235 * current platform. machine_id contains the initial address where the
236 * description was found during boot.
238 extern struct machdep_calls ppc_md;
239 extern struct machdep_calls *machine_id;
241 #define __machine_desc __attribute__ ((__section__ (".machine.desc")))
243 #define define_machine(name) \
244 extern struct machdep_calls mach_##name; \
245 EXPORT_SYMBOL(mach_##name); \
246 struct machdep_calls mach_##name __machine_desc =
248 #define machine_is(name) \
250 extern struct machdep_calls mach_##name \
251 __attribute__((weak)); \
252 machine_id == &mach_##name; \
255 extern void probe_machine(void);
257 #ifdef CONFIG_PPC_PMAC
259 * Power macintoshes have either a CUDA, PMU or SMU controlling
260 * system reset, power, NVRAM, RTC.
262 typedef enum sys_ctrler_kind {
263 SYS_CTRLER_UNKNOWN = 0,
268 extern sys_ctrler_t sys_ctrler;
270 #endif /* CONFIG_PPC_PMAC */
272 static inline void log_error(char *buf, unsigned int err_type, int fatal)
274 if (ppc_md.log_error)
275 ppc_md.log_error(buf, err_type, fatal);
278 #define __define_machine_initcall(mach, fn, id) \
279 static int __init __machine_initcall_##mach##_##fn(void) { \
280 if (machine_is(mach)) return fn(); \
283 __define_initcall(__machine_initcall_##mach##_##fn, id);
285 #define machine_early_initcall(mach, fn) __define_machine_initcall(mach, fn, early)
286 #define machine_core_initcall(mach, fn) __define_machine_initcall(mach, fn, 1)
287 #define machine_core_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 1s)
288 #define machine_postcore_initcall(mach, fn) __define_machine_initcall(mach, fn, 2)
289 #define machine_postcore_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 2s)
290 #define machine_arch_initcall(mach, fn) __define_machine_initcall(mach, fn, 3)
291 #define machine_arch_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 3s)
292 #define machine_subsys_initcall(mach, fn) __define_machine_initcall(mach, fn, 4)
293 #define machine_subsys_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 4s)
294 #define machine_fs_initcall(mach, fn) __define_machine_initcall(mach, fn, 5)
295 #define machine_fs_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 5s)
296 #define machine_rootfs_initcall(mach, fn) __define_machine_initcall(mach, fn, rootfs)
297 #define machine_device_initcall(mach, fn) __define_machine_initcall(mach, fn, 6)
298 #define machine_device_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 6s)
299 #define machine_late_initcall(mach, fn) __define_machine_initcall(mach, fn, 7)
300 #define machine_late_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 7s)
302 #endif /* __KERNEL__ */
303 #endif /* _ASM_POWERPC_MACHDEP_H */