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 unsigned long flags, 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 unsigned long (*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); 111 112 /* Called during machine check exception to retrive fixup address. */ 113 bool (*mce_check_early_recovery)(struct pt_regs *regs); 114 115 /* Motherboard/chipset features. This is a kind of general purpose 116 * hook used to control some machine specific features (like reset 117 * lines, chip power control, etc...). 118 */ 119 long (*feature_call)(unsigned int feature, ...); 120 121 /* Get legacy PCI/IDE interrupt mapping */ 122 int (*pci_get_legacy_ide_irq)(struct pci_dev *dev, int channel); 123 124 /* Get access protection for /dev/mem */ 125 pgprot_t (*phys_mem_access_prot)(struct file *file, 126 unsigned long pfn, 127 unsigned long size, 128 pgprot_t vma_prot); 129 130 /* 131 * Function for waiting for work with reduced power in idle loop; 132 * called with interrupts disabled. 133 */ 134 void (*power_save)(void); 135 136 /* Function to enable performance monitor counters for this 137 platform, called once per cpu. */ 138 void (*enable_pmcs)(void); 139 140 /* Set DABR for this platform, leave empty for default implementation */ 141 int (*set_dabr)(unsigned long dabr, 142 unsigned long dabrx); 143 144 /* Set DAWR for this platform, leave empty for default implementation */ 145 int (*set_dawr)(unsigned long dawr, 146 unsigned long dawrx); 147 148 #ifdef CONFIG_PPC32 /* XXX for now */ 149 /* A general init function, called by ppc_init in init/main.c. 150 May be NULL. */ 151 void (*init)(void); 152 153 void (*kgdb_map_scc)(void); 154 155 /* 156 * optional PCI "hooks" 157 */ 158 /* Called at then very end of pcibios_init() */ 159 void (*pcibios_after_init)(void); 160 161 #endif /* CONFIG_PPC32 */ 162 163 /* Called in indirect_* to avoid touching devices */ 164 int (*pci_exclude_device)(struct pci_controller *, unsigned char, unsigned char); 165 166 /* Called after PPC generic resource fixup to perform 167 machine specific fixups */ 168 void (*pcibios_fixup_resources)(struct pci_dev *); 169 170 /* Called for each PCI bus in the system when it's probed */ 171 void (*pcibios_fixup_bus)(struct pci_bus *); 172 173 /* Called after scan and before resource survey */ 174 void (*pcibios_fixup_phb)(struct pci_controller *hose); 175 176 resource_size_t (*pcibios_default_alignment)(void); 177 178 #ifdef CONFIG_PCI_IOV 179 void (*pcibios_fixup_sriov)(struct pci_dev *pdev); 180 resource_size_t (*pcibios_iov_resource_alignment)(struct pci_dev *, int resno); 181 #endif /* CONFIG_PCI_IOV */ 182 183 /* Called to shutdown machine specific hardware not already controlled 184 * by other drivers. 185 */ 186 void (*machine_shutdown)(void); 187 188 #ifdef CONFIG_KEXEC_CORE 189 void (*kexec_cpu_down)(int crash_shutdown, int secondary); 190 191 /* Called to do what every setup is needed on image and the 192 * reboot code buffer. Returns 0 on success. 193 * Provide your own (maybe dummy) implementation if your platform 194 * claims to support kexec. 195 */ 196 int (*machine_kexec_prepare)(struct kimage *image); 197 198 /* Called to perform the _real_ kexec. 199 * Do NOT allocate memory or fail here. We are past the point of 200 * no return. 201 */ 202 void (*machine_kexec)(struct kimage *image); 203 #endif /* CONFIG_KEXEC_CORE */ 204 205 #ifdef CONFIG_SUSPEND 206 /* These are called to disable and enable, respectively, IRQs when 207 * entering a suspend state. If NULL, then the generic versions 208 * will be called. The generic versions disable/enable the 209 * decrementer along with interrupts. 210 */ 211 void (*suspend_disable_irqs)(void); 212 void (*suspend_enable_irqs)(void); 213 #endif 214 int (*suspend_disable_cpu)(void); 215 216 #ifdef CONFIG_ARCH_CPU_PROBE_RELEASE 217 ssize_t (*cpu_probe)(const char *, size_t); 218 ssize_t (*cpu_release)(const char *, size_t); 219 #endif 220 221 #ifdef CONFIG_ARCH_RANDOM 222 int (*get_random_seed)(unsigned long *v); 223 #endif 224 }; 225 226 extern void e500_idle(void); 227 extern void power4_idle(void); 228 extern void power7_idle(void); 229 extern void ppc6xx_idle(void); 230 extern void book3e_idle(void); 231 232 /* 233 * ppc_md contains a copy of the machine description structure for the 234 * current platform. machine_id contains the initial address where the 235 * description was found during boot. 236 */ 237 extern struct machdep_calls ppc_md; 238 extern struct machdep_calls *machine_id; 239 240 #define __machine_desc __attribute__ ((__section__ (".machine.desc"))) 241 242 #define define_machine(name) \ 243 extern struct machdep_calls mach_##name; \ 244 EXPORT_SYMBOL(mach_##name); \ 245 struct machdep_calls mach_##name __machine_desc = 246 247 #define machine_is(name) \ 248 ({ \ 249 extern struct machdep_calls mach_##name \ 250 __attribute__((weak)); \ 251 machine_id == &mach_##name; \ 252 }) 253 254 extern void probe_machine(void); 255 256 #ifdef CONFIG_PPC_PMAC 257 /* 258 * Power macintoshes have either a CUDA, PMU or SMU controlling 259 * system reset, power, NVRAM, RTC. 260 */ 261 typedef enum sys_ctrler_kind { 262 SYS_CTRLER_UNKNOWN = 0, 263 SYS_CTRLER_CUDA = 1, 264 SYS_CTRLER_PMU = 2, 265 SYS_CTRLER_SMU = 3, 266 } sys_ctrler_t; 267 extern sys_ctrler_t sys_ctrler; 268 269 #endif /* CONFIG_PPC_PMAC */ 270 271 static inline void log_error(char *buf, unsigned int err_type, int fatal) 272 { 273 if (ppc_md.log_error) 274 ppc_md.log_error(buf, err_type, fatal); 275 } 276 277 #define __define_machine_initcall(mach, fn, id) \ 278 static int __init __machine_initcall_##mach##_##fn(void) { \ 279 if (machine_is(mach)) return fn(); \ 280 return 0; \ 281 } \ 282 __define_initcall(__machine_initcall_##mach##_##fn, id); 283 284 #define machine_early_initcall(mach, fn) __define_machine_initcall(mach, fn, early) 285 #define machine_core_initcall(mach, fn) __define_machine_initcall(mach, fn, 1) 286 #define machine_core_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 1s) 287 #define machine_postcore_initcall(mach, fn) __define_machine_initcall(mach, fn, 2) 288 #define machine_postcore_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 2s) 289 #define machine_arch_initcall(mach, fn) __define_machine_initcall(mach, fn, 3) 290 #define machine_arch_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 3s) 291 #define machine_subsys_initcall(mach, fn) __define_machine_initcall(mach, fn, 4) 292 #define machine_subsys_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 4s) 293 #define machine_fs_initcall(mach, fn) __define_machine_initcall(mach, fn, 5) 294 #define machine_fs_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 5s) 295 #define machine_rootfs_initcall(mach, fn) __define_machine_initcall(mach, fn, rootfs) 296 #define machine_device_initcall(mach, fn) __define_machine_initcall(mach, fn, 6) 297 #define machine_device_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 6s) 298 #define machine_late_initcall(mach, fn) __define_machine_initcall(mach, fn, 7) 299 #define machine_late_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 7s) 300 301 #endif /* __KERNEL__ */ 302 #endif /* _ASM_POWERPC_MACHDEP_H */ 303