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/* 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
#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);
/* 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);
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)(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);
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
#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 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 __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 */
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