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/init.h> 8 #include <linux/export.h> 9 #include <linux/time64.h> 10 11 #include <asm/page.h> 12 13 struct pt_regs; 14 struct pci_bus; 15 struct device; 16 struct device_node; 17 struct iommu_table; 18 struct rtc_time; 19 struct file; 20 struct pci_dev; 21 struct pci_controller; 22 struct kimage; 23 struct pci_host_bridge; 24 struct seq_file; 25 26 struct machdep_calls { 27 const char *name; 28 const char *compatible; 29 const char * const *compatibles; 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 void (*machine_check_log_err)(void); 103 104 /* Motherboard/chipset features. This is a kind of general purpose 105 * hook used to control some machine specific features (like reset 106 * lines, chip power control, etc...). 107 */ 108 long (*feature_call)(unsigned int feature, ...); 109 110 /* Get legacy PCI/IDE interrupt mapping */ 111 int (*pci_get_legacy_ide_irq)(struct pci_dev *dev, int channel); 112 113 /* Get access protection for /dev/mem */ 114 pgprot_t (*phys_mem_access_prot)(unsigned long pfn, 115 unsigned long size, 116 pgprot_t vma_prot); 117 118 /* 119 * Function for waiting for work with reduced power in idle loop; 120 * called with interrupts disabled. 121 */ 122 void (*power_save)(void); 123 124 /* Function to enable performance monitor counters for this 125 platform, called once per cpu. */ 126 void (*enable_pmcs)(void); 127 128 /* Set DABR for this platform, leave empty for default implementation */ 129 int (*set_dabr)(unsigned long dabr, 130 unsigned long dabrx); 131 132 /* Set DAWR for this platform, leave empty for default implementation */ 133 int (*set_dawr)(int nr, unsigned long dawr, 134 unsigned long dawrx); 135 136 #ifdef CONFIG_PPC32 /* XXX for now */ 137 /* A general init function, called by ppc_init in init/main.c. 138 May be NULL. */ 139 void (*init)(void); 140 141 /* 142 * optional PCI "hooks" 143 */ 144 /* Called at then very end of pcibios_init() */ 145 void (*pcibios_after_init)(void); 146 147 #endif /* CONFIG_PPC32 */ 148 149 /* Called in indirect_* to avoid touching devices */ 150 int (*pci_exclude_device)(struct pci_controller *, unsigned char, unsigned char); 151 152 /* Called after PPC generic resource fixup to perform 153 machine specific fixups */ 154 void (*pcibios_fixup_resources)(struct pci_dev *); 155 156 /* Called for each PCI bus in the system when it's probed */ 157 void (*pcibios_fixup_bus)(struct pci_bus *); 158 159 /* Called after scan and before resource survey */ 160 void (*pcibios_fixup_phb)(struct pci_controller *hose); 161 162 /* 163 * Called after device has been added to bus and 164 * before sysfs has been created. 165 */ 166 void (*pcibios_bus_add_device)(struct pci_dev *pdev); 167 168 resource_size_t (*pcibios_default_alignment)(void); 169 170 #ifdef CONFIG_PCI_IOV 171 void (*pcibios_fixup_sriov)(struct pci_dev *pdev); 172 resource_size_t (*pcibios_iov_resource_alignment)(struct pci_dev *, int resno); 173 int (*pcibios_sriov_enable)(struct pci_dev *pdev, u16 num_vfs); 174 int (*pcibios_sriov_disable)(struct pci_dev *pdev); 175 #endif /* CONFIG_PCI_IOV */ 176 177 /* Called to shutdown machine specific hardware not already controlled 178 * by other drivers. 179 */ 180 void (*machine_shutdown)(void); 181 182 #ifdef CONFIG_KEXEC_CORE 183 void (*kexec_cpu_down)(int crash_shutdown, int secondary); 184 185 /* Called to perform the _real_ kexec. 186 * Do NOT allocate memory or fail here. We are past the point of 187 * no return. 188 */ 189 void (*machine_kexec)(struct kimage *image); 190 #endif /* CONFIG_KEXEC_CORE */ 191 192 #ifdef CONFIG_SUSPEND 193 /* These are called to disable and enable, respectively, IRQs when 194 * entering a suspend state. If NULL, then the generic versions 195 * will be called. The generic versions disable/enable the 196 * decrementer along with interrupts. 197 */ 198 void (*suspend_disable_irqs)(void); 199 void (*suspend_enable_irqs)(void); 200 #endif 201 202 #ifdef CONFIG_ARCH_CPU_PROBE_RELEASE 203 ssize_t (*cpu_probe)(const char *, size_t); 204 ssize_t (*cpu_release)(const char *, size_t); 205 #endif 206 207 int (*get_random_seed)(unsigned long *v); 208 }; 209 210 extern void e500_idle(void); 211 extern void power4_idle(void); 212 extern void ppc6xx_idle(void); 213 214 /* 215 * ppc_md contains a copy of the machine description structure for the 216 * current platform. machine_id contains the initial address where the 217 * description was found during boot. 218 */ 219 extern struct machdep_calls ppc_md; 220 extern struct machdep_calls *machine_id; 221 222 #define __machine_desc __section(".machine.desc") 223 224 #define define_machine(name) \ 225 extern struct machdep_calls mach_##name; \ 226 EXPORT_SYMBOL(mach_##name); \ 227 struct machdep_calls mach_##name __machine_desc = 228 229 static inline bool __machine_is(const struct machdep_calls *md) 230 { 231 WARN_ON(!machine_id); // complain if used before probe_machine() 232 return machine_id == md; 233 } 234 235 #define machine_is(name) \ 236 ({ \ 237 extern struct machdep_calls mach_##name __weak; \ 238 __machine_is(&mach_##name); \ 239 }) 240 241 static inline void log_error(char *buf, unsigned int err_type, int fatal) 242 { 243 if (ppc_md.log_error) 244 ppc_md.log_error(buf, err_type, fatal); 245 } 246 247 #define __define_machine_initcall(mach, fn, id) \ 248 static int __init __machine_initcall_##mach##_##fn(void) { \ 249 if (machine_is(mach)) return fn(); \ 250 return 0; \ 251 } \ 252 __define_initcall(__machine_initcall_##mach##_##fn, id); 253 254 #define machine_early_initcall(mach, fn) __define_machine_initcall(mach, fn, early) 255 #define machine_core_initcall(mach, fn) __define_machine_initcall(mach, fn, 1) 256 #define machine_core_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 1s) 257 #define machine_postcore_initcall(mach, fn) __define_machine_initcall(mach, fn, 2) 258 #define machine_postcore_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 2s) 259 #define machine_arch_initcall(mach, fn) __define_machine_initcall(mach, fn, 3) 260 #define machine_arch_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 3s) 261 #define machine_subsys_initcall(mach, fn) __define_machine_initcall(mach, fn, 4) 262 #define machine_subsys_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 4s) 263 #define machine_fs_initcall(mach, fn) __define_machine_initcall(mach, fn, 5) 264 #define machine_fs_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 5s) 265 #define machine_rootfs_initcall(mach, fn) __define_machine_initcall(mach, fn, rootfs) 266 #define machine_device_initcall(mach, fn) __define_machine_initcall(mach, fn, 6) 267 #define machine_device_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 6s) 268 #define machine_late_initcall(mach, fn) __define_machine_initcall(mach, fn, 7) 269 #define machine_late_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 7s) 270 271 #endif /* __KERNEL__ */ 272 #endif /* _ASM_POWERPC_MACHDEP_H */ 273