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