1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef _ASM_POWERPC_SETUP_H 3#define _ASM_POWERPC_SETUP_H 4 5#include <uapi/asm/setup.h> 6 7#ifndef __ASSEMBLY__ 8extern void ppc_printk_progress(char *s, unsigned short hex); 9 10extern unsigned long long memory_limit; 11 12struct device_node; 13 14/* Used in very early kernel initialization. */ 15extern unsigned long reloc_offset(void); 16extern unsigned long add_reloc_offset(unsigned long); 17extern void reloc_got2(unsigned long); 18 19#define PTRRELOC(x) ((typeof(x)) add_reloc_offset((unsigned long)(x))) 20 21void check_for_initrd(void); 22void mem_topology_setup(void); 23void initmem_init(void); 24void setup_panic(void); 25#define ARCH_PANIC_TIMEOUT 180 26 27#ifdef CONFIG_PPC_PSERIES 28extern bool pseries_reloc_on_exception(void); 29extern bool pseries_enable_reloc_on_exc(void); 30extern void pseries_disable_reloc_on_exc(void); 31extern void pseries_big_endian_exceptions(void); 32void __init pseries_little_endian_exceptions(void); 33#else 34static inline bool pseries_reloc_on_exception(void) { return false; } 35static inline bool pseries_enable_reloc_on_exc(void) { return false; } 36static inline void pseries_disable_reloc_on_exc(void) {} 37static inline void pseries_big_endian_exceptions(void) {} 38static inline void pseries_little_endian_exceptions(void) {} 39#endif /* CONFIG_PPC_PSERIES */ 40 41void rfi_flush_enable(bool enable); 42 43/* These are bit flags */ 44enum l1d_flush_type { 45 L1D_FLUSH_NONE = 0x1, 46 L1D_FLUSH_FALLBACK = 0x2, 47 L1D_FLUSH_ORI = 0x4, 48 L1D_FLUSH_MTTRIG = 0x8, 49}; 50 51void setup_rfi_flush(enum l1d_flush_type, bool enable); 52void setup_entry_flush(bool enable); 53void setup_uaccess_flush(bool enable); 54void do_rfi_flush_fixups(enum l1d_flush_type types); 55#ifdef CONFIG_PPC_BARRIER_NOSPEC 56void __init setup_barrier_nospec(void); 57#else 58static inline void setup_barrier_nospec(void) { } 59#endif 60void do_uaccess_flush_fixups(enum l1d_flush_type types); 61void do_entry_flush_fixups(enum l1d_flush_type types); 62void do_barrier_nospec_fixups(bool enable); 63extern bool barrier_nospec_enabled; 64 65#ifdef CONFIG_PPC_BARRIER_NOSPEC 66void do_barrier_nospec_fixups_range(bool enable, void *start, void *end); 67#else 68static inline void do_barrier_nospec_fixups_range(bool enable, void *start, void *end) { } 69#endif 70 71#ifdef CONFIG_PPC_E500 72void __init setup_spectre_v2(void); 73#else 74static inline void setup_spectre_v2(void) {} 75#endif 76void __init do_btb_flush_fixups(void); 77 78#ifdef CONFIG_PPC32 79unsigned long __init early_init(unsigned long dt_ptr); 80void __init machine_init(u64 dt_ptr); 81#endif 82void __init early_setup(unsigned long dt_ptr); 83void early_setup_secondary(void); 84 85/* prom_init (OpenFirmware) */ 86unsigned long __init prom_init(unsigned long r3, unsigned long r4, 87 unsigned long pp, unsigned long r6, 88 unsigned long r7, unsigned long kbase); 89 90extern struct seq_buf ppc_hw_desc; 91 92#endif /* !__ASSEMBLY__ */ 93 94#endif /* _ASM_POWERPC_SETUP_H */ 95 96