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