/* SPDX-License-Identifier: GPL-2.0-or-later */ #ifndef _ASM_POWERPC_MACHDEP_H #define _ASM_POWERPC_MACHDEP_H #ifdef __KERNEL__ #include #include #include #include #include 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 { const char *name; const char *compatible; const char * const *compatibles; #ifdef CONFIG_PPC64 #ifdef CONFIG_PM void (*iommu_restore)(void); #endif #ifdef CONFIG_MEMORY_HOTPLUG 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); /* 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); /* finds all the pci_controllers present at boot */ void (*discover_phbs)(void); /* 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); 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); 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); void (*machine_check_log_err)(void); /* 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)(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)(int nr, 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); /* * 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 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 #ifdef CONFIG_ARCH_CPU_PROBE_RELEASE ssize_t (*cpu_probe)(const char *, size_t); ssize_t (*cpu_release)(const char *, size_t); #endif int (*get_random_seed)(unsigned long *v); }; extern void e500_idle(void); extern void power4_idle(void); extern void ppc6xx_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 __section(".machine.desc") #define define_machine(name) \ extern struct machdep_calls mach_##name; \ EXPORT_SYMBOL(mach_##name); \ struct machdep_calls mach_##name __machine_desc = static inline bool __machine_is(const struct machdep_calls *md) { WARN_ON(!machine_id); // complain if used before probe_machine() return machine_id == md; } #define machine_is(name) \ ({ \ extern struct machdep_calls mach_##name __weak; \ __machine_is(&mach_##name); \ }) 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 */