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