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 /* 7 */ 8 9 #include <linux/seq_file.h> 10 #include <linux/init.h> 11 #include <linux/dma-mapping.h> 12 #include <linux/export.h> 13 14 #include <asm/setup.h> 15 16 /* We export this macro for external modules like Alsa to know if 17 * ppc_md.feature_call is implemented or not 18 */ 19 #define CONFIG_PPC_HAS_FEATURE_CALLS 20 21 struct pt_regs; 22 struct pci_bus; 23 struct device_node; 24 struct iommu_table; 25 struct rtc_time; 26 struct file; 27 struct pci_controller; 28 struct kimage; 29 struct pci_host_bridge; 30 31 struct machdep_calls { 32 char *name; 33 #ifdef CONFIG_PPC64 34 void __iomem * (*ioremap)(phys_addr_t addr, unsigned long size, 35 pgprot_t prot, void *caller); 36 void (*iounmap)(volatile void __iomem *token); 37 38 #ifdef CONFIG_PM 39 void (*iommu_save)(void); 40 void (*iommu_restore)(void); 41 #endif 42 #ifdef CONFIG_MEMORY_HOTPLUG_SPARSE 43 unsigned long (*memory_block_size)(void); 44 #endif 45 #endif /* CONFIG_PPC64 */ 46 47 void (*dma_set_mask)(struct device *dev, u64 dma_mask); 48 49 int (*probe)(void); 50 void (*setup_arch)(void); /* Optional, may be NULL */ 51 /* Optional, may be NULL. */ 52 void (*show_cpuinfo)(struct seq_file *m); 53 void (*show_percpuinfo)(struct seq_file *m, int i); 54 /* Returns the current operating frequency of "cpu" in Hz */ 55 unsigned long (*get_proc_freq)(unsigned int cpu); 56 57 void (*init_IRQ)(void); 58 59 /* Return an irq, or 0 to indicate there are none pending. */ 60 unsigned int (*get_irq)(void); 61 62 /* PCI stuff */ 63 /* Called after allocating resources */ 64 void (*pcibios_fixup)(void); 65 void (*pci_irq_fixup)(struct pci_dev *dev); 66 int (*pcibios_root_bridge_prepare)(struct pci_host_bridge 67 *bridge); 68 69 /* To setup PHBs when using automatic OF platform driver for PCI */ 70 int (*pci_setup_phb)(struct pci_controller *host); 71 72 void __noreturn (*restart)(char *cmd); 73 void __noreturn (*halt)(void); 74 void (*panic)(char *str); 75 void (*cpu_die)(void); 76 77 long (*time_init)(void); /* Optional, may be NULL */ 78 79 int (*set_rtc_time)(struct rtc_time *); 80 void (*get_rtc_time)(struct rtc_time *); 81 time64_t (*get_boot_time)(void); 82 unsigned char (*rtc_read_val)(int addr); 83 void (*rtc_write_val)(int addr, unsigned char val); 84 85 void (*calibrate_decr)(void); 86 87 void (*progress)(char *, unsigned short); 88 89 /* Interface for platform error logging */ 90 void (*log_error)(char *buf, unsigned int err_type, int fatal); 91 92 unsigned char (*nvram_read_val)(int addr); 93 void (*nvram_write_val)(int addr, unsigned char val); 94 ssize_t (*nvram_write)(char *buf, size_t count, loff_t *index); 95 ssize_t (*nvram_read)(char *buf, size_t count, loff_t *index); 96 ssize_t (*nvram_size)(void); 97 void (*nvram_sync)(void); 98 99 /* Exception handlers */ 100 int (*system_reset_exception)(struct pt_regs *regs); 101 int (*machine_check_exception)(struct pt_regs *regs); 102 int (*handle_hmi_exception)(struct pt_regs *regs); 103 104 /* Early exception handlers called in realmode */ 105 int (*hmi_exception_early)(struct pt_regs *regs); 106 long (*machine_check_early)(struct pt_regs *regs); 107 108 /* Called during machine check exception to retrive fixup address. */ 109 bool (*mce_check_early_recovery)(struct pt_regs *regs); 110 111 /* Motherboard/chipset features. This is a kind of general purpose 112 * hook used to control some machine specific features (like reset 113 * lines, chip power control, etc...). 114 */ 115 long (*feature_call)(unsigned int feature, ...); 116 117 /* Get legacy PCI/IDE interrupt mapping */ 118 int (*pci_get_legacy_ide_irq)(struct pci_dev *dev, int channel); 119 120 /* Get access protection for /dev/mem */ 121 pgprot_t (*phys_mem_access_prot)(struct file *file, 122 unsigned long pfn, 123 unsigned long size, 124 pgprot_t vma_prot); 125 126 /* 127 * Function for waiting for work with reduced power in idle loop; 128 * called with interrupts disabled. 129 */ 130 void (*power_save)(void); 131 132 /* Function to enable performance monitor counters for this 133 platform, called once per cpu. */ 134 void (*enable_pmcs)(void); 135 136 /* Set DABR for this platform, leave empty for default implementation */ 137 int (*set_dabr)(unsigned long dabr, 138 unsigned long dabrx); 139 140 /* Set DAWR for this platform, leave empty for default implementation */ 141 int (*set_dawr)(unsigned long dawr, 142 unsigned long dawrx); 143 144 #ifdef CONFIG_PPC32 /* XXX for now */ 145 /* A general init function, called by ppc_init in init/main.c. 146 May be NULL. */ 147 void (*init)(void); 148 149 void (*kgdb_map_scc)(void); 150 151 /* 152 * optional PCI "hooks" 153 */ 154 /* Called at then very end of pcibios_init() */ 155 void (*pcibios_after_init)(void); 156 157 #endif /* CONFIG_PPC32 */ 158 159 /* Called in indirect_* to avoid touching devices */ 160 int (*pci_exclude_device)(struct pci_controller *, unsigned char, unsigned char); 161 162 /* Called after PPC generic resource fixup to perform 163 machine specific fixups */ 164 void (*pcibios_fixup_resources)(struct pci_dev *); 165 166 /* Called for each PCI bus in the system when it's probed */ 167 void (*pcibios_fixup_bus)(struct pci_bus *); 168 169 /* Called after scan and before resource survey */ 170 void (*pcibios_fixup_phb)(struct pci_controller *hose); 171 172 /* 173 * Called after device has been added to bus and 174 * before sysfs has been created. 175 */ 176 void (*pcibios_bus_add_device)(struct pci_dev *pdev); 177 178 resource_size_t (*pcibios_default_alignment)(void); 179 180 #ifdef CONFIG_PCI_IOV 181 void (*pcibios_fixup_sriov)(struct pci_dev *pdev); 182 resource_size_t (*pcibios_iov_resource_alignment)(struct pci_dev *, int resno); 183 int (*pcibios_sriov_enable)(struct pci_dev *pdev, u16 num_vfs); 184 int (*pcibios_sriov_disable)(struct pci_dev *pdev); 185 #endif /* CONFIG_PCI_IOV */ 186 187 /* Called to shutdown machine specific hardware not already controlled 188 * by other drivers. 189 */ 190 void (*machine_shutdown)(void); 191 192 #ifdef CONFIG_KEXEC_CORE 193 void (*kexec_cpu_down)(int crash_shutdown, int secondary); 194 195 /* Called to do what every setup is needed on image and the 196 * reboot code buffer. Returns 0 on success. 197 * Provide your own (maybe dummy) implementation if your platform 198 * claims to support kexec. 199 */ 200 int (*machine_kexec_prepare)(struct kimage *image); 201 202 /* Called to perform the _real_ kexec. 203 * Do NOT allocate memory or fail here. We are past the point of 204 * no return. 205 */ 206 void (*machine_kexec)(struct kimage *image); 207 #endif /* CONFIG_KEXEC_CORE */ 208 209 #ifdef CONFIG_SUSPEND 210 /* These are called to disable and enable, respectively, IRQs when 211 * entering a suspend state. If NULL, then the generic versions 212 * will be called. The generic versions disable/enable the 213 * decrementer along with interrupts. 214 */ 215 void (*suspend_disable_irqs)(void); 216 void (*suspend_enable_irqs)(void); 217 #endif 218 int (*suspend_disable_cpu)(void); 219 220 #ifdef CONFIG_ARCH_CPU_PROBE_RELEASE 221 ssize_t (*cpu_probe)(const char *, size_t); 222 ssize_t (*cpu_release)(const char *, size_t); 223 #endif 224 225 #ifdef CONFIG_ARCH_RANDOM 226 int (*get_random_seed)(unsigned long *v); 227 #endif 228 }; 229 230 extern void e500_idle(void); 231 extern void power4_idle(void); 232 extern void power7_idle(void); 233 extern void power9_idle(void); 234 extern void ppc6xx_idle(void); 235 extern void book3e_idle(void); 236 237 /* 238 * ppc_md contains a copy of the machine description structure for the 239 * current platform. machine_id contains the initial address where the 240 * description was found during boot. 241 */ 242 extern struct machdep_calls ppc_md; 243 extern struct machdep_calls *machine_id; 244 245 #define __machine_desc __attribute__ ((__section__ (".machine.desc"))) 246 247 #define define_machine(name) \ 248 extern struct machdep_calls mach_##name; \ 249 EXPORT_SYMBOL(mach_##name); \ 250 struct machdep_calls mach_##name __machine_desc = 251 252 #define machine_is(name) \ 253 ({ \ 254 extern struct machdep_calls mach_##name \ 255 __attribute__((weak)); \ 256 machine_id == &mach_##name; \ 257 }) 258 259 extern void probe_machine(void); 260 261 #ifdef CONFIG_PPC_PMAC 262 /* 263 * Power macintoshes have either a CUDA, PMU or SMU controlling 264 * system reset, power, NVRAM, RTC. 265 */ 266 typedef enum sys_ctrler_kind { 267 SYS_CTRLER_UNKNOWN = 0, 268 SYS_CTRLER_CUDA = 1, 269 SYS_CTRLER_PMU = 2, 270 SYS_CTRLER_SMU = 3, 271 } sys_ctrler_t; 272 extern sys_ctrler_t sys_ctrler; 273 274 #endif /* CONFIG_PPC_PMAC */ 275 276 static inline void log_error(char *buf, unsigned int err_type, int fatal) 277 { 278 if (ppc_md.log_error) 279 ppc_md.log_error(buf, err_type, fatal); 280 } 281 282 #define __define_machine_initcall(mach, fn, id) \ 283 static int __init __machine_initcall_##mach##_##fn(void) { \ 284 if (machine_is(mach)) return fn(); \ 285 return 0; \ 286 } \ 287 __define_initcall(__machine_initcall_##mach##_##fn, id); 288 289 #define machine_early_initcall(mach, fn) __define_machine_initcall(mach, fn, early) 290 #define machine_core_initcall(mach, fn) __define_machine_initcall(mach, fn, 1) 291 #define machine_core_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 1s) 292 #define machine_postcore_initcall(mach, fn) __define_machine_initcall(mach, fn, 2) 293 #define machine_postcore_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 2s) 294 #define machine_arch_initcall(mach, fn) __define_machine_initcall(mach, fn, 3) 295 #define machine_arch_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 3s) 296 #define machine_subsys_initcall(mach, fn) __define_machine_initcall(mach, fn, 4) 297 #define machine_subsys_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 4s) 298 #define machine_fs_initcall(mach, fn) __define_machine_initcall(mach, fn, 5) 299 #define machine_fs_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 5s) 300 #define machine_rootfs_initcall(mach, fn) __define_machine_initcall(mach, fn, rootfs) 301 #define machine_device_initcall(mach, fn) __define_machine_initcall(mach, fn, 6) 302 #define machine_device_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 6s) 303 #define machine_late_initcall(mach, fn) __define_machine_initcall(mach, fn, 7) 304 #define machine_late_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 7s) 305 306 #endif /* __KERNEL__ */ 307 #endif /* _ASM_POWERPC_MACHDEP_H */ 308