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 /* Platform set_dma_mask and dma_get_required_mask overrides */ 51 int (*dma_set_mask)(struct device *dev, u64 dma_mask); 52 u64 (*dma_get_required_mask)(struct device *dev); 53 54 int (*probe)(void); 55 void (*setup_arch)(void); /* Optional, may be NULL */ 56 /* Optional, may be NULL. */ 57 void (*show_cpuinfo)(struct seq_file *m); 58 void (*show_percpuinfo)(struct seq_file *m, int i); 59 /* Returns the current operating frequency of "cpu" in Hz */ 60 unsigned long (*get_proc_freq)(unsigned int cpu); 61 62 void (*init_IRQ)(void); 63 64 /* Return an irq, or 0 to indicate there are none pending. */ 65 unsigned int (*get_irq)(void); 66 67 /* PCI stuff */ 68 /* Called after allocating resources */ 69 void (*pcibios_fixup)(void); 70 void (*pci_irq_fixup)(struct pci_dev *dev); 71 int (*pcibios_root_bridge_prepare)(struct pci_host_bridge 72 *bridge); 73 74 /* To setup PHBs when using automatic OF platform driver for PCI */ 75 int (*pci_setup_phb)(struct pci_controller *host); 76 77 void __noreturn (*restart)(char *cmd); 78 void __noreturn (*halt)(void); 79 void (*panic)(char *str); 80 void (*cpu_die)(void); 81 82 long (*time_init)(void); /* Optional, may be NULL */ 83 84 int (*set_rtc_time)(struct rtc_time *); 85 void (*get_rtc_time)(struct rtc_time *); 86 time64_t (*get_boot_time)(void); 87 unsigned char (*rtc_read_val)(int addr); 88 void (*rtc_write_val)(int addr, unsigned char val); 89 90 void (*calibrate_decr)(void); 91 92 void (*progress)(char *, unsigned short); 93 94 /* Interface for platform error logging */ 95 void (*log_error)(char *buf, unsigned int err_type, int fatal); 96 97 unsigned char (*nvram_read_val)(int addr); 98 void (*nvram_write_val)(int addr, unsigned char val); 99 ssize_t (*nvram_write)(char *buf, size_t count, loff_t *index); 100 ssize_t (*nvram_read)(char *buf, size_t count, loff_t *index); 101 ssize_t (*nvram_size)(void); 102 void (*nvram_sync)(void); 103 104 /* Exception handlers */ 105 int (*system_reset_exception)(struct pt_regs *regs); 106 int (*machine_check_exception)(struct pt_regs *regs); 107 int (*handle_hmi_exception)(struct pt_regs *regs); 108 109 /* Early exception handlers called in realmode */ 110 int (*hmi_exception_early)(struct pt_regs *regs); 111 long (*machine_check_early)(struct pt_regs *regs); 112 113 /* Called during machine check exception to retrive fixup address. */ 114 bool (*mce_check_early_recovery)(struct pt_regs *regs); 115 116 /* Motherboard/chipset features. This is a kind of general purpose 117 * hook used to control some machine specific features (like reset 118 * lines, chip power control, etc...). 119 */ 120 long (*feature_call)(unsigned int feature, ...); 121 122 /* Get legacy PCI/IDE interrupt mapping */ 123 int (*pci_get_legacy_ide_irq)(struct pci_dev *dev, int channel); 124 125 /* Get access protection for /dev/mem */ 126 pgprot_t (*phys_mem_access_prot)(struct file *file, 127 unsigned long pfn, 128 unsigned long size, 129 pgprot_t vma_prot); 130 131 /* 132 * Function for waiting for work with reduced power in idle loop; 133 * called with interrupts disabled. 134 */ 135 void (*power_save)(void); 136 137 /* Function to enable performance monitor counters for this 138 platform, called once per cpu. */ 139 void (*enable_pmcs)(void); 140 141 /* Set DABR for this platform, leave empty for default implementation */ 142 int (*set_dabr)(unsigned long dabr, 143 unsigned long dabrx); 144 145 /* Set DAWR for this platform, leave empty for default implementation */ 146 int (*set_dawr)(unsigned long dawr, 147 unsigned long dawrx); 148 149 #ifdef CONFIG_PPC32 /* XXX for now */ 150 /* A general init function, called by ppc_init in init/main.c. 151 May be NULL. */ 152 void (*init)(void); 153 154 void (*kgdb_map_scc)(void); 155 156 /* 157 * optional PCI "hooks" 158 */ 159 /* Called at then very end of pcibios_init() */ 160 void (*pcibios_after_init)(void); 161 162 #endif /* CONFIG_PPC32 */ 163 164 /* Called in indirect_* to avoid touching devices */ 165 int (*pci_exclude_device)(struct pci_controller *, unsigned char, unsigned char); 166 167 /* Called after PPC generic resource fixup to perform 168 machine specific fixups */ 169 void (*pcibios_fixup_resources)(struct pci_dev *); 170 171 /* Called for each PCI bus in the system when it's probed */ 172 void (*pcibios_fixup_bus)(struct pci_bus *); 173 174 /* Called after scan and before resource survey */ 175 void (*pcibios_fixup_phb)(struct pci_controller *hose); 176 177 /* 178 * Called after device has been added to bus and 179 * before sysfs has been created. 180 */ 181 void (*pcibios_bus_add_device)(struct pci_dev *pdev); 182 183 resource_size_t (*pcibios_default_alignment)(void); 184 185 #ifdef CONFIG_PCI_IOV 186 void (*pcibios_fixup_sriov)(struct pci_dev *pdev); 187 resource_size_t (*pcibios_iov_resource_alignment)(struct pci_dev *, int resno); 188 int (*pcibios_sriov_enable)(struct pci_dev *pdev, u16 num_vfs); 189 int (*pcibios_sriov_disable)(struct pci_dev *pdev); 190 #endif /* CONFIG_PCI_IOV */ 191 192 /* Called to shutdown machine specific hardware not already controlled 193 * by other drivers. 194 */ 195 void (*machine_shutdown)(void); 196 197 #ifdef CONFIG_KEXEC_CORE 198 void (*kexec_cpu_down)(int crash_shutdown, int secondary); 199 200 /* Called to do what every setup is needed on image and the 201 * reboot code buffer. Returns 0 on success. 202 * Provide your own (maybe dummy) implementation if your platform 203 * claims to support kexec. 204 */ 205 int (*machine_kexec_prepare)(struct kimage *image); 206 207 /* Called to perform the _real_ kexec. 208 * Do NOT allocate memory or fail here. We are past the point of 209 * no return. 210 */ 211 void (*machine_kexec)(struct kimage *image); 212 #endif /* CONFIG_KEXEC_CORE */ 213 214 #ifdef CONFIG_SUSPEND 215 /* These are called to disable and enable, respectively, IRQs when 216 * entering a suspend state. If NULL, then the generic versions 217 * will be called. The generic versions disable/enable the 218 * decrementer along with interrupts. 219 */ 220 void (*suspend_disable_irqs)(void); 221 void (*suspend_enable_irqs)(void); 222 #endif 223 int (*suspend_disable_cpu)(void); 224 225 #ifdef CONFIG_ARCH_CPU_PROBE_RELEASE 226 ssize_t (*cpu_probe)(const char *, size_t); 227 ssize_t (*cpu_release)(const char *, size_t); 228 #endif 229 230 #ifdef CONFIG_ARCH_RANDOM 231 int (*get_random_seed)(unsigned long *v); 232 #endif 233 }; 234 235 extern void e500_idle(void); 236 extern void power4_idle(void); 237 extern void power7_idle(void); 238 extern void power9_idle(void); 239 extern void ppc6xx_idle(void); 240 extern void book3e_idle(void); 241 242 /* 243 * ppc_md contains a copy of the machine description structure for the 244 * current platform. machine_id contains the initial address where the 245 * description was found during boot. 246 */ 247 extern struct machdep_calls ppc_md; 248 extern struct machdep_calls *machine_id; 249 250 #define __machine_desc __attribute__ ((__section__ (".machine.desc"))) 251 252 #define define_machine(name) \ 253 extern struct machdep_calls mach_##name; \ 254 EXPORT_SYMBOL(mach_##name); \ 255 struct machdep_calls mach_##name __machine_desc = 256 257 #define machine_is(name) \ 258 ({ \ 259 extern struct machdep_calls mach_##name \ 260 __attribute__((weak)); \ 261 machine_id == &mach_##name; \ 262 }) 263 264 extern void probe_machine(void); 265 266 #ifdef CONFIG_PPC_PMAC 267 /* 268 * Power macintoshes have either a CUDA, PMU or SMU controlling 269 * system reset, power, NVRAM, RTC. 270 */ 271 typedef enum sys_ctrler_kind { 272 SYS_CTRLER_UNKNOWN = 0, 273 SYS_CTRLER_CUDA = 1, 274 SYS_CTRLER_PMU = 2, 275 SYS_CTRLER_SMU = 3, 276 } sys_ctrler_t; 277 extern sys_ctrler_t sys_ctrler; 278 279 #endif /* CONFIG_PPC_PMAC */ 280 281 static inline void log_error(char *buf, unsigned int err_type, int fatal) 282 { 283 if (ppc_md.log_error) 284 ppc_md.log_error(buf, err_type, fatal); 285 } 286 287 #define __define_machine_initcall(mach, fn, id) \ 288 static int __init __machine_initcall_##mach##_##fn(void) { \ 289 if (machine_is(mach)) return fn(); \ 290 return 0; \ 291 } \ 292 __define_initcall(__machine_initcall_##mach##_##fn, id); 293 294 #define machine_early_initcall(mach, fn) __define_machine_initcall(mach, fn, early) 295 #define machine_core_initcall(mach, fn) __define_machine_initcall(mach, fn, 1) 296 #define machine_core_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 1s) 297 #define machine_postcore_initcall(mach, fn) __define_machine_initcall(mach, fn, 2) 298 #define machine_postcore_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 2s) 299 #define machine_arch_initcall(mach, fn) __define_machine_initcall(mach, fn, 3) 300 #define machine_arch_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 3s) 301 #define machine_subsys_initcall(mach, fn) __define_machine_initcall(mach, fn, 4) 302 #define machine_subsys_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 4s) 303 #define machine_fs_initcall(mach, fn) __define_machine_initcall(mach, fn, 5) 304 #define machine_fs_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 5s) 305 #define machine_rootfs_initcall(mach, fn) __define_machine_initcall(mach, fn, rootfs) 306 #define machine_device_initcall(mach, fn) __define_machine_initcall(mach, fn, 6) 307 #define machine_device_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 6s) 308 #define machine_late_initcall(mach, fn) __define_machine_initcall(mach, fn, 7) 309 #define machine_late_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 7s) 310 311 #endif /* __KERNEL__ */ 312 #endif /* _ASM_POWERPC_MACHDEP_H */ 313