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 /* finds all the pci_controllers present at boot */ 63 void (*discover_phbs)(void); 64 65 /* To setup PHBs when using automatic OF platform driver for PCI */ 66 int (*pci_setup_phb)(struct pci_controller *host); 67 68 void __noreturn (*restart)(char *cmd); 69 void __noreturn (*halt)(void); 70 void (*panic)(char *str); 71 72 long (*time_init)(void); /* Optional, may be NULL */ 73 74 int (*set_rtc_time)(struct rtc_time *); 75 void (*get_rtc_time)(struct rtc_time *); 76 time64_t (*get_boot_time)(void); 77 unsigned char (*rtc_read_val)(int addr); 78 void (*rtc_write_val)(int addr, unsigned char val); 79 80 void (*calibrate_decr)(void); 81 82 void (*progress)(char *, unsigned short); 83 84 /* Interface for platform error logging */ 85 void (*log_error)(char *buf, unsigned int err_type, int fatal); 86 87 unsigned char (*nvram_read_val)(int addr); 88 void (*nvram_write_val)(int addr, unsigned char val); 89 ssize_t (*nvram_write)(char *buf, size_t count, loff_t *index); 90 ssize_t (*nvram_read)(char *buf, size_t count, loff_t *index); 91 ssize_t (*nvram_size)(void); 92 void (*nvram_sync)(void); 93 94 /* Exception handlers */ 95 int (*system_reset_exception)(struct pt_regs *regs); 96 int (*machine_check_exception)(struct pt_regs *regs); 97 int (*handle_hmi_exception)(struct pt_regs *regs); 98 99 /* Early exception handlers called in realmode */ 100 int (*hmi_exception_early)(struct pt_regs *regs); 101 long (*machine_check_early)(struct pt_regs *regs); 102 103 /* Called during machine check exception to retrive fixup address. */ 104 bool (*mce_check_early_recovery)(struct pt_regs *regs); 105 106 /* Motherboard/chipset features. This is a kind of general purpose 107 * hook used to control some machine specific features (like reset 108 * lines, chip power control, etc...). 109 */ 110 long (*feature_call)(unsigned int feature, ...); 111 112 /* Get legacy PCI/IDE interrupt mapping */ 113 int (*pci_get_legacy_ide_irq)(struct pci_dev *dev, int channel); 114 115 /* Get access protection for /dev/mem */ 116 pgprot_t (*phys_mem_access_prot)(struct file *file, 117 unsigned long pfn, 118 unsigned long size, 119 pgprot_t vma_prot); 120 121 /* 122 * Function for waiting for work with reduced power in idle loop; 123 * called with interrupts disabled. 124 */ 125 void (*power_save)(void); 126 127 /* Function to enable performance monitor counters for this 128 platform, called once per cpu. */ 129 void (*enable_pmcs)(void); 130 131 /* Set DABR for this platform, leave empty for default implementation */ 132 int (*set_dabr)(unsigned long dabr, 133 unsigned long dabrx); 134 135 /* Set DAWR for this platform, leave empty for default implementation */ 136 int (*set_dawr)(int nr, unsigned long dawr, 137 unsigned long dawrx); 138 139 #ifdef CONFIG_PPC32 /* XXX for now */ 140 /* A general init function, called by ppc_init in init/main.c. 141 May be NULL. */ 142 void (*init)(void); 143 144 void (*kgdb_map_scc)(void); 145 146 /* 147 * optional PCI "hooks" 148 */ 149 /* Called at then very end of pcibios_init() */ 150 void (*pcibios_after_init)(void); 151 152 #endif /* CONFIG_PPC32 */ 153 154 /* Called in indirect_* to avoid touching devices */ 155 int (*pci_exclude_device)(struct pci_controller *, unsigned char, unsigned char); 156 157 /* Called after PPC generic resource fixup to perform 158 machine specific fixups */ 159 void (*pcibios_fixup_resources)(struct pci_dev *); 160 161 /* Called for each PCI bus in the system when it's probed */ 162 void (*pcibios_fixup_bus)(struct pci_bus *); 163 164 /* Called after scan and before resource survey */ 165 void (*pcibios_fixup_phb)(struct pci_controller *hose); 166 167 /* 168 * Called after device has been added to bus and 169 * before sysfs has been created. 170 */ 171 void (*pcibios_bus_add_device)(struct pci_dev *pdev); 172 173 resource_size_t (*pcibios_default_alignment)(void); 174 175 #ifdef CONFIG_PCI_IOV 176 void (*pcibios_fixup_sriov)(struct pci_dev *pdev); 177 resource_size_t (*pcibios_iov_resource_alignment)(struct pci_dev *, int resno); 178 int (*pcibios_sriov_enable)(struct pci_dev *pdev, u16 num_vfs); 179 int (*pcibios_sriov_disable)(struct pci_dev *pdev); 180 #endif /* CONFIG_PCI_IOV */ 181 182 /* Called to shutdown machine specific hardware not already controlled 183 * by other drivers. 184 */ 185 void (*machine_shutdown)(void); 186 187 #ifdef CONFIG_KEXEC_CORE 188 void (*kexec_cpu_down)(int crash_shutdown, int secondary); 189 190 /* Called to do what every setup is needed on image and the 191 * reboot code buffer. Returns 0 on success. 192 * Provide your own (maybe dummy) implementation if your platform 193 * claims to support kexec. 194 */ 195 int (*machine_kexec_prepare)(struct kimage *image); 196 197 /* Called to perform the _real_ kexec. 198 * Do NOT allocate memory or fail here. We are past the point of 199 * no return. 200 */ 201 void (*machine_kexec)(struct kimage *image); 202 #endif /* CONFIG_KEXEC_CORE */ 203 204 #ifdef CONFIG_SUSPEND 205 /* These are called to disable and enable, respectively, IRQs when 206 * entering a suspend state. If NULL, then the generic versions 207 * will be called. The generic versions disable/enable the 208 * decrementer along with interrupts. 209 */ 210 void (*suspend_disable_irqs)(void); 211 void (*suspend_enable_irqs)(void); 212 #endif 213 214 #ifdef CONFIG_ARCH_CPU_PROBE_RELEASE 215 ssize_t (*cpu_probe)(const char *, size_t); 216 ssize_t (*cpu_release)(const char *, size_t); 217 #endif 218 219 #ifdef CONFIG_ARCH_RANDOM 220 int (*get_random_seed)(unsigned long *v); 221 #endif 222 }; 223 224 extern void e500_idle(void); 225 extern void power4_idle(void); 226 extern void ppc6xx_idle(void); 227 extern void book3e_idle(void); 228 229 /* 230 * ppc_md contains a copy of the machine description structure for the 231 * current platform. machine_id contains the initial address where the 232 * description was found during boot. 233 */ 234 extern struct machdep_calls ppc_md; 235 extern struct machdep_calls *machine_id; 236 237 #define __machine_desc __section(".machine.desc") 238 239 #define define_machine(name) \ 240 extern struct machdep_calls mach_##name; \ 241 EXPORT_SYMBOL(mach_##name); \ 242 struct machdep_calls mach_##name __machine_desc = 243 244 #define machine_is(name) \ 245 ({ \ 246 extern struct machdep_calls mach_##name \ 247 __attribute__((weak)); \ 248 machine_id == &mach_##name; \ 249 }) 250 251 extern void probe_machine(void); 252 253 #ifdef CONFIG_PPC_PMAC 254 /* 255 * Power macintoshes have either a CUDA, PMU or SMU controlling 256 * system reset, power, NVRAM, RTC. 257 */ 258 typedef enum sys_ctrler_kind { 259 SYS_CTRLER_UNKNOWN = 0, 260 SYS_CTRLER_CUDA = 1, 261 SYS_CTRLER_PMU = 2, 262 SYS_CTRLER_SMU = 3, 263 } sys_ctrler_t; 264 extern sys_ctrler_t sys_ctrler; 265 266 #endif /* CONFIG_PPC_PMAC */ 267 268 static inline void log_error(char *buf, unsigned int err_type, int fatal) 269 { 270 if (ppc_md.log_error) 271 ppc_md.log_error(buf, err_type, fatal); 272 } 273 274 #define __define_machine_initcall(mach, fn, id) \ 275 static int __init __machine_initcall_##mach##_##fn(void) { \ 276 if (machine_is(mach)) return fn(); \ 277 return 0; \ 278 } \ 279 __define_initcall(__machine_initcall_##mach##_##fn, id); 280 281 #define machine_early_initcall(mach, fn) __define_machine_initcall(mach, fn, early) 282 #define machine_core_initcall(mach, fn) __define_machine_initcall(mach, fn, 1) 283 #define machine_core_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 1s) 284 #define machine_postcore_initcall(mach, fn) __define_machine_initcall(mach, fn, 2) 285 #define machine_postcore_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 2s) 286 #define machine_arch_initcall(mach, fn) __define_machine_initcall(mach, fn, 3) 287 #define machine_arch_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 3s) 288 #define machine_subsys_initcall(mach, fn) __define_machine_initcall(mach, fn, 4) 289 #define machine_subsys_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 4s) 290 #define machine_fs_initcall(mach, fn) __define_machine_initcall(mach, fn, 5) 291 #define machine_fs_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 5s) 292 #define machine_rootfs_initcall(mach, fn) __define_machine_initcall(mach, fn, rootfs) 293 #define machine_device_initcall(mach, fn) __define_machine_initcall(mach, fn, 6) 294 #define machine_device_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 6s) 295 #define machine_late_initcall(mach, fn) __define_machine_initcall(mach, fn, 7) 296 #define machine_late_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 7s) 297 298 #endif /* __KERNEL__ */ 299 #endif /* _ASM_POWERPC_MACHDEP_H */ 300