1 #ifndef _ASM_POWERPC_MACHDEP_H 2 #define _ASM_POWERPC_MACHDEP_H 3 #ifdef __KERNEL__ 4 5 /* 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License 8 * as published by the Free Software Foundation; either version 9 * 2 of the License, or (at your option) any later version. 10 */ 11 12 #include <linux/seq_file.h> 13 #include <linux/init.h> 14 #include <linux/dma-mapping.h> 15 #include <linux/export.h> 16 17 #include <asm/setup.h> 18 19 /* We export this macro for external modules like Alsa to know if 20 * ppc_md.feature_call is implemented or not 21 */ 22 #define CONFIG_PPC_HAS_FEATURE_CALLS 23 24 struct pt_regs; 25 struct pci_bus; 26 struct device_node; 27 struct iommu_table; 28 struct rtc_time; 29 struct file; 30 struct pci_controller; 31 struct kimage; 32 struct pci_host_bridge; 33 34 struct machdep_calls { 35 char *name; 36 #ifdef CONFIG_PPC64 37 void __iomem * (*ioremap)(phys_addr_t addr, unsigned long size, 38 pgprot_t prot, void *caller); 39 void (*iounmap)(volatile void __iomem *token); 40 41 #ifdef CONFIG_PM 42 void (*iommu_save)(void); 43 void (*iommu_restore)(void); 44 #endif 45 #ifdef CONFIG_MEMORY_HOTPLUG_SPARSE 46 unsigned long (*memory_block_size)(void); 47 #endif 48 #endif /* CONFIG_PPC64 */ 49 50 void (*dma_set_mask)(struct device *dev, u64 dma_mask); 51 52 int (*probe)(void); 53 void (*setup_arch)(void); /* Optional, may be NULL */ 54 /* Optional, may be NULL. */ 55 void (*show_cpuinfo)(struct seq_file *m); 56 void (*show_percpuinfo)(struct seq_file *m, int i); 57 /* Returns the current operating frequency of "cpu" in Hz */ 58 unsigned long (*get_proc_freq)(unsigned int cpu); 59 60 void (*init_IRQ)(void); 61 62 /* Return an irq, or 0 to indicate there are none pending. */ 63 unsigned int (*get_irq)(void); 64 65 /* PCI stuff */ 66 /* Called after allocating resources */ 67 void (*pcibios_fixup)(void); 68 void (*pci_irq_fixup)(struct pci_dev *dev); 69 int (*pcibios_root_bridge_prepare)(struct pci_host_bridge 70 *bridge); 71 72 /* To setup PHBs when using automatic OF platform driver for PCI */ 73 int (*pci_setup_phb)(struct pci_controller *host); 74 75 void __noreturn (*restart)(char *cmd); 76 void __noreturn (*halt)(void); 77 void (*panic)(char *str); 78 void (*cpu_die)(void); 79 80 long (*time_init)(void); /* Optional, may be NULL */ 81 82 int (*set_rtc_time)(struct rtc_time *); 83 void (*get_rtc_time)(struct rtc_time *); 84 time64_t (*get_boot_time)(void); 85 unsigned char (*rtc_read_val)(int addr); 86 void (*rtc_write_val)(int addr, unsigned char val); 87 88 void (*calibrate_decr)(void); 89 90 void (*progress)(char *, unsigned short); 91 92 /* Interface for platform error logging */ 93 void (*log_error)(char *buf, unsigned int err_type, int fatal); 94 95 unsigned char (*nvram_read_val)(int addr); 96 void (*nvram_write_val)(int addr, unsigned char val); 97 ssize_t (*nvram_write)(char *buf, size_t count, loff_t *index); 98 ssize_t (*nvram_read)(char *buf, size_t count, loff_t *index); 99 ssize_t (*nvram_size)(void); 100 void (*nvram_sync)(void); 101 102 /* Exception handlers */ 103 int (*system_reset_exception)(struct pt_regs *regs); 104 int (*machine_check_exception)(struct pt_regs *regs); 105 int (*handle_hmi_exception)(struct pt_regs *regs); 106 107 /* Early exception handlers called in realmode */ 108 int (*hmi_exception_early)(struct pt_regs *regs); 109 long (*machine_check_early)(struct pt_regs *regs); 110 111 /* Called during machine check exception to retrive fixup address. */ 112 bool (*mce_check_early_recovery)(struct pt_regs *regs); 113 114 /* Motherboard/chipset features. This is a kind of general purpose 115 * hook used to control some machine specific features (like reset 116 * lines, chip power control, etc...). 117 */ 118 long (*feature_call)(unsigned int feature, ...); 119 120 /* Get legacy PCI/IDE interrupt mapping */ 121 int (*pci_get_legacy_ide_irq)(struct pci_dev *dev, int channel); 122 123 /* Get access protection for /dev/mem */ 124 pgprot_t (*phys_mem_access_prot)(struct file *file, 125 unsigned long pfn, 126 unsigned long size, 127 pgprot_t vma_prot); 128 129 /* 130 * Function for waiting for work with reduced power in idle loop; 131 * called with interrupts disabled. 132 */ 133 void (*power_save)(void); 134 135 /* Function to enable performance monitor counters for this 136 platform, called once per cpu. */ 137 void (*enable_pmcs)(void); 138 139 /* Set DABR for this platform, leave empty for default implementation */ 140 int (*set_dabr)(unsigned long dabr, 141 unsigned long dabrx); 142 143 /* Set DAWR for this platform, leave empty for default implementation */ 144 int (*set_dawr)(unsigned long dawr, 145 unsigned long dawrx); 146 147 #ifdef CONFIG_PPC32 /* XXX for now */ 148 /* A general init function, called by ppc_init in init/main.c. 149 May be NULL. */ 150 void (*init)(void); 151 152 void (*kgdb_map_scc)(void); 153 154 /* 155 * optional PCI "hooks" 156 */ 157 /* Called at then very end of pcibios_init() */ 158 void (*pcibios_after_init)(void); 159 160 #endif /* CONFIG_PPC32 */ 161 162 /* Called in indirect_* to avoid touching devices */ 163 int (*pci_exclude_device)(struct pci_controller *, unsigned char, unsigned char); 164 165 /* Called after PPC generic resource fixup to perform 166 machine specific fixups */ 167 void (*pcibios_fixup_resources)(struct pci_dev *); 168 169 /* Called for each PCI bus in the system when it's probed */ 170 void (*pcibios_fixup_bus)(struct pci_bus *); 171 172 /* Called after scan and before resource survey */ 173 void (*pcibios_fixup_phb)(struct pci_controller *hose); 174 175 /* 176 * Called after device has been added to bus and 177 * before sysfs has been created. 178 */ 179 void (*pcibios_bus_add_device)(struct pci_dev *pdev); 180 181 resource_size_t (*pcibios_default_alignment)(void); 182 183 #ifdef CONFIG_PCI_IOV 184 void (*pcibios_fixup_sriov)(struct pci_dev *pdev); 185 resource_size_t (*pcibios_iov_resource_alignment)(struct pci_dev *, int resno); 186 int (*pcibios_sriov_enable)(struct pci_dev *pdev, u16 num_vfs); 187 int (*pcibios_sriov_disable)(struct pci_dev *pdev); 188 #endif /* CONFIG_PCI_IOV */ 189 190 /* Called to shutdown machine specific hardware not already controlled 191 * by other drivers. 192 */ 193 void (*machine_shutdown)(void); 194 195 #ifdef CONFIG_KEXEC_CORE 196 void (*kexec_cpu_down)(int crash_shutdown, int secondary); 197 198 /* Called to do what every setup is needed on image and the 199 * reboot code buffer. Returns 0 on success. 200 * Provide your own (maybe dummy) implementation if your platform 201 * claims to support kexec. 202 */ 203 int (*machine_kexec_prepare)(struct kimage *image); 204 205 /* Called to perform the _real_ kexec. 206 * Do NOT allocate memory or fail here. We are past the point of 207 * no return. 208 */ 209 void (*machine_kexec)(struct kimage *image); 210 #endif /* CONFIG_KEXEC_CORE */ 211 212 #ifdef CONFIG_SUSPEND 213 /* These are called to disable and enable, respectively, IRQs when 214 * entering a suspend state. If NULL, then the generic versions 215 * will be called. The generic versions disable/enable the 216 * decrementer along with interrupts. 217 */ 218 void (*suspend_disable_irqs)(void); 219 void (*suspend_enable_irqs)(void); 220 #endif 221 int (*suspend_disable_cpu)(void); 222 223 #ifdef CONFIG_ARCH_CPU_PROBE_RELEASE 224 ssize_t (*cpu_probe)(const char *, size_t); 225 ssize_t (*cpu_release)(const char *, size_t); 226 #endif 227 228 #ifdef CONFIG_ARCH_RANDOM 229 int (*get_random_seed)(unsigned long *v); 230 #endif 231 }; 232 233 extern void e500_idle(void); 234 extern void power4_idle(void); 235 extern void power7_idle(void); 236 extern void power9_idle(void); 237 extern void ppc6xx_idle(void); 238 extern void book3e_idle(void); 239 240 /* 241 * ppc_md contains a copy of the machine description structure for the 242 * current platform. machine_id contains the initial address where the 243 * description was found during boot. 244 */ 245 extern struct machdep_calls ppc_md; 246 extern struct machdep_calls *machine_id; 247 248 #define __machine_desc __attribute__ ((__section__ (".machine.desc"))) 249 250 #define define_machine(name) \ 251 extern struct machdep_calls mach_##name; \ 252 EXPORT_SYMBOL(mach_##name); \ 253 struct machdep_calls mach_##name __machine_desc = 254 255 #define machine_is(name) \ 256 ({ \ 257 extern struct machdep_calls mach_##name \ 258 __attribute__((weak)); \ 259 machine_id == &mach_##name; \ 260 }) 261 262 extern void probe_machine(void); 263 264 #ifdef CONFIG_PPC_PMAC 265 /* 266 * Power macintoshes have either a CUDA, PMU or SMU controlling 267 * system reset, power, NVRAM, RTC. 268 */ 269 typedef enum sys_ctrler_kind { 270 SYS_CTRLER_UNKNOWN = 0, 271 SYS_CTRLER_CUDA = 1, 272 SYS_CTRLER_PMU = 2, 273 SYS_CTRLER_SMU = 3, 274 } sys_ctrler_t; 275 extern sys_ctrler_t sys_ctrler; 276 277 #endif /* CONFIG_PPC_PMAC */ 278 279 static inline void log_error(char *buf, unsigned int err_type, int fatal) 280 { 281 if (ppc_md.log_error) 282 ppc_md.log_error(buf, err_type, fatal); 283 } 284 285 #define __define_machine_initcall(mach, fn, id) \ 286 static int __init __machine_initcall_##mach##_##fn(void) { \ 287 if (machine_is(mach)) return fn(); \ 288 return 0; \ 289 } \ 290 __define_initcall(__machine_initcall_##mach##_##fn, id); 291 292 #define machine_early_initcall(mach, fn) __define_machine_initcall(mach, fn, early) 293 #define machine_core_initcall(mach, fn) __define_machine_initcall(mach, fn, 1) 294 #define machine_core_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 1s) 295 #define machine_postcore_initcall(mach, fn) __define_machine_initcall(mach, fn, 2) 296 #define machine_postcore_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 2s) 297 #define machine_arch_initcall(mach, fn) __define_machine_initcall(mach, fn, 3) 298 #define machine_arch_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 3s) 299 #define machine_subsys_initcall(mach, fn) __define_machine_initcall(mach, fn, 4) 300 #define machine_subsys_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 4s) 301 #define machine_fs_initcall(mach, fn) __define_machine_initcall(mach, fn, 5) 302 #define machine_fs_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 5s) 303 #define machine_rootfs_initcall(mach, fn) __define_machine_initcall(mach, fn, rootfs) 304 #define machine_device_initcall(mach, fn) __define_machine_initcall(mach, fn, 6) 305 #define machine_device_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 6s) 306 #define machine_late_initcall(mach, fn) __define_machine_initcall(mach, fn, 7) 307 #define machine_late_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 7s) 308 309 #endif /* __KERNEL__ */ 310 #endif /* _ASM_POWERPC_MACHDEP_H */ 311