1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 #ifndef _ASM_POWERPC_MACHDEP_H 3 #define _ASM_POWERPC_MACHDEP_H 4 #ifdef __KERNEL__ 5 6 #include <linux/seq_file.h> 7 #include <linux/init.h> 8 #include <linux/dma-mapping.h> 9 #include <linux/export.h> 10 11 #include <asm/setup.h> 12 13 /* We export this macro for external modules like Alsa to know if 14 * ppc_md.feature_call is implemented or not 15 */ 16 #define CONFIG_PPC_HAS_FEATURE_CALLS 17 18 struct pt_regs; 19 struct pci_bus; 20 struct device_node; 21 struct iommu_table; 22 struct rtc_time; 23 struct file; 24 struct pci_controller; 25 struct kimage; 26 struct pci_host_bridge; 27 28 struct machdep_calls { 29 char *name; 30 #ifdef CONFIG_PPC64 31 #ifdef CONFIG_PM 32 void (*iommu_save)(void); 33 void (*iommu_restore)(void); 34 #endif 35 #ifdef CONFIG_MEMORY_HOTPLUG_SPARSE 36 unsigned long (*memory_block_size)(void); 37 #endif 38 #endif /* CONFIG_PPC64 */ 39 40 void (*dma_set_mask)(struct device *dev, u64 dma_mask); 41 42 int (*probe)(void); 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); 49 50 void (*init_IRQ)(void); 51 52 /* Return an irq, or 0 to indicate there are none pending. */ 53 unsigned int (*get_irq)(void); 54 55 /* PCI stuff */ 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 60 *bridge); 61 62 /* To setup PHBs when using automatic OF platform driver for PCI */ 63 int (*pci_setup_phb)(struct pci_controller *host); 64 65 void __noreturn (*restart)(char *cmd); 66 void __noreturn (*halt)(void); 67 void (*panic)(char *str); 68 void (*cpu_die)(void); 69 70 long (*time_init)(void); /* Optional, may be NULL */ 71 72 int (*set_rtc_time)(struct rtc_time *); 73 void (*get_rtc_time)(struct rtc_time *); 74 time64_t (*get_boot_time)(void); 75 unsigned char (*rtc_read_val)(int addr); 76 void (*rtc_write_val)(int addr, unsigned char val); 77 78 void (*calibrate_decr)(void); 79 80 void (*progress)(char *, unsigned short); 81 82 /* Interface for platform error logging */ 83 void (*log_error)(char *buf, unsigned int err_type, int fatal); 84 85 unsigned char (*nvram_read_val)(int addr); 86 void (*nvram_write_val)(int addr, unsigned char val); 87 ssize_t (*nvram_write)(char *buf, size_t count, loff_t *index); 88 ssize_t (*nvram_read)(char *buf, size_t count, loff_t *index); 89 ssize_t (*nvram_size)(void); 90 void (*nvram_sync)(void); 91 92 /* Exception handlers */ 93 int (*system_reset_exception)(struct pt_regs *regs); 94 int (*machine_check_exception)(struct pt_regs *regs); 95 int (*handle_hmi_exception)(struct pt_regs *regs); 96 97 /* Early exception handlers called in realmode */ 98 int (*hmi_exception_early)(struct pt_regs *regs); 99 long (*machine_check_early)(struct pt_regs *regs); 100 101 /* Called during machine check exception to retrive fixup address. */ 102 bool (*mce_check_early_recovery)(struct pt_regs *regs); 103 104 /* Motherboard/chipset features. This is a kind of general purpose 105 * hook used to control some machine specific features (like reset 106 * lines, chip power control, etc...). 107 */ 108 long (*feature_call)(unsigned int feature, ...); 109 110 /* Get legacy PCI/IDE interrupt mapping */ 111 int (*pci_get_legacy_ide_irq)(struct pci_dev *dev, int channel); 112 113 /* Get access protection for /dev/mem */ 114 pgprot_t (*phys_mem_access_prot)(struct file *file, 115 unsigned long pfn, 116 unsigned long size, 117 pgprot_t vma_prot); 118 119 /* 120 * Function for waiting for work with reduced power in idle loop; 121 * called with interrupts disabled. 122 */ 123 void (*power_save)(void); 124 125 /* Function to enable performance monitor counters for this 126 platform, called once per cpu. */ 127 void (*enable_pmcs)(void); 128 129 /* Set DABR for this platform, leave empty for default implementation */ 130 int (*set_dabr)(unsigned long dabr, 131 unsigned long dabrx); 132 133 /* Set DAWR for this platform, leave empty for default implementation */ 134 int (*set_dawr)(unsigned long dawr, 135 unsigned long dawrx); 136 137 #ifdef CONFIG_PPC32 /* XXX for now */ 138 /* A general init function, called by ppc_init in init/main.c. 139 May be NULL. */ 140 void (*init)(void); 141 142 void (*kgdb_map_scc)(void); 143 144 /* 145 * optional PCI "hooks" 146 */ 147 /* Called at then very end of pcibios_init() */ 148 void (*pcibios_after_init)(void); 149 150 #endif /* CONFIG_PPC32 */ 151 152 /* Called in indirect_* to avoid touching devices */ 153 int (*pci_exclude_device)(struct pci_controller *, unsigned char, unsigned char); 154 155 /* Called after PPC generic resource fixup to perform 156 machine specific fixups */ 157 void (*pcibios_fixup_resources)(struct pci_dev *); 158 159 /* Called for each PCI bus in the system when it's probed */ 160 void (*pcibios_fixup_bus)(struct pci_bus *); 161 162 /* Called after scan and before resource survey */ 163 void (*pcibios_fixup_phb)(struct pci_controller *hose); 164 165 /* 166 * Called after device has been added to bus and 167 * before sysfs has been created. 168 */ 169 void (*pcibios_bus_add_device)(struct pci_dev *pdev); 170 171 resource_size_t (*pcibios_default_alignment)(void); 172 173 #ifdef CONFIG_PCI_IOV 174 void (*pcibios_fixup_sriov)(struct pci_dev *pdev); 175 resource_size_t (*pcibios_iov_resource_alignment)(struct pci_dev *, int resno); 176 int (*pcibios_sriov_enable)(struct pci_dev *pdev, u16 num_vfs); 177 int (*pcibios_sriov_disable)(struct pci_dev *pdev); 178 #endif /* CONFIG_PCI_IOV */ 179 180 /* Called to shutdown machine specific hardware not already controlled 181 * by other drivers. 182 */ 183 void (*machine_shutdown)(void); 184 185 #ifdef CONFIG_KEXEC_CORE 186 void (*kexec_cpu_down)(int crash_shutdown, int secondary); 187 188 /* Called to do what every setup is needed on image and the 189 * reboot code buffer. Returns 0 on success. 190 * Provide your own (maybe dummy) implementation if your platform 191 * claims to support kexec. 192 */ 193 int (*machine_kexec_prepare)(struct kimage *image); 194 195 /* Called to perform the _real_ kexec. 196 * Do NOT allocate memory or fail here. We are past the point of 197 * no return. 198 */ 199 void (*machine_kexec)(struct kimage *image); 200 #endif /* CONFIG_KEXEC_CORE */ 201 202 #ifdef CONFIG_SUSPEND 203 /* These are called to disable and enable, respectively, IRQs when 204 * entering a suspend state. If NULL, then the generic versions 205 * will be called. The generic versions disable/enable the 206 * decrementer along with interrupts. 207 */ 208 void (*suspend_disable_irqs)(void); 209 void (*suspend_enable_irqs)(void); 210 #endif 211 int (*suspend_disable_cpu)(void); 212 213 #ifdef CONFIG_ARCH_CPU_PROBE_RELEASE 214 ssize_t (*cpu_probe)(const char *, size_t); 215 ssize_t (*cpu_release)(const char *, size_t); 216 #endif 217 218 #ifdef CONFIG_ARCH_RANDOM 219 int (*get_random_seed)(unsigned long *v); 220 #endif 221 }; 222 223 extern void e500_idle(void); 224 extern void power4_idle(void); 225 extern void power7_idle(void); 226 extern void power9_idle(void); 227 extern void ppc6xx_idle(void); 228 extern void book3e_idle(void); 229 230 /* 231 * ppc_md contains a copy of the machine description structure for the 232 * current platform. machine_id contains the initial address where the 233 * description was found during boot. 234 */ 235 extern struct machdep_calls ppc_md; 236 extern struct machdep_calls *machine_id; 237 238 #define __machine_desc __attribute__ ((__section__ (".machine.desc"))) 239 240 #define define_machine(name) \ 241 extern struct machdep_calls mach_##name; \ 242 EXPORT_SYMBOL(mach_##name); \ 243 struct machdep_calls mach_##name __machine_desc = 244 245 #define machine_is(name) \ 246 ({ \ 247 extern struct machdep_calls mach_##name \ 248 __attribute__((weak)); \ 249 machine_id == &mach_##name; \ 250 }) 251 252 extern void probe_machine(void); 253 254 #ifdef CONFIG_PPC_PMAC 255 /* 256 * Power macintoshes have either a CUDA, PMU or SMU controlling 257 * system reset, power, NVRAM, RTC. 258 */ 259 typedef enum sys_ctrler_kind { 260 SYS_CTRLER_UNKNOWN = 0, 261 SYS_CTRLER_CUDA = 1, 262 SYS_CTRLER_PMU = 2, 263 SYS_CTRLER_SMU = 3, 264 } sys_ctrler_t; 265 extern sys_ctrler_t sys_ctrler; 266 267 #endif /* CONFIG_PPC_PMAC */ 268 269 static inline void log_error(char *buf, unsigned int err_type, int fatal) 270 { 271 if (ppc_md.log_error) 272 ppc_md.log_error(buf, err_type, fatal); 273 } 274 275 #define __define_machine_initcall(mach, fn, id) \ 276 static int __init __machine_initcall_##mach##_##fn(void) { \ 277 if (machine_is(mach)) return fn(); \ 278 return 0; \ 279 } \ 280 __define_initcall(__machine_initcall_##mach##_##fn, id); 281 282 #define machine_early_initcall(mach, fn) __define_machine_initcall(mach, fn, early) 283 #define machine_core_initcall(mach, fn) __define_machine_initcall(mach, fn, 1) 284 #define machine_core_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 1s) 285 #define machine_postcore_initcall(mach, fn) __define_machine_initcall(mach, fn, 2) 286 #define machine_postcore_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 2s) 287 #define machine_arch_initcall(mach, fn) __define_machine_initcall(mach, fn, 3) 288 #define machine_arch_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 3s) 289 #define machine_subsys_initcall(mach, fn) __define_machine_initcall(mach, fn, 4) 290 #define machine_subsys_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 4s) 291 #define machine_fs_initcall(mach, fn) __define_machine_initcall(mach, fn, 5) 292 #define machine_fs_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 5s) 293 #define machine_rootfs_initcall(mach, fn) __define_machine_initcall(mach, fn, rootfs) 294 #define machine_device_initcall(mach, fn) __define_machine_initcall(mach, fn, 6) 295 #define machine_device_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 6s) 296 #define machine_late_initcall(mach, fn) __define_machine_initcall(mach, fn, 7) 297 #define machine_late_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 7s) 298 299 #endif /* __KERNEL__ */ 300 #endif /* _ASM_POWERPC_MACHDEP_H */ 301