LXR linux/arch/powerpc/include/asm/setup.h

   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 int rtas_data;
  11extern unsigned long long memory_limit;
  12extern bool init_mem_is_free;
  13extern void *zalloc_maybe_bootmem(size_t size, gfp_t mask);
  14
  15struct device_node;
  16extern void note_scsi_host(struct device_node *, void *);
  17
  18/* Used in very early kernel initialization. */
  19extern unsigned long reloc_offset(void);
  20extern unsigned long add_reloc_offset(unsigned long);
  21extern void reloc_got2(unsigned long);
  22
  23#define PTRRELOC(x)     ((typeof(x)) add_reloc_offset((unsigned long)(x)))
  24
  25void check_for_initrd(void);
  26void mem_topology_setup(void);
  27void initmem_init(void);
  28void setup_panic(void);
  29#define ARCH_PANIC_TIMEOUT 180
  30
  31#ifdef CONFIG_PPC_PSERIES
  32extern bool pseries_enable_reloc_on_exc(void);
  33extern void pseries_disable_reloc_on_exc(void);
  34extern void pseries_big_endian_exceptions(void);
  35extern void pseries_little_endian_exceptions(void);
  36#else
  37static inline bool pseries_enable_reloc_on_exc(void) { return false; }
  38static inline void pseries_disable_reloc_on_exc(void) {}
  39static inline void pseries_big_endian_exceptions(void) {}
  40static inline void pseries_little_endian_exceptions(void) {}
  41#endif /* CONFIG_PPC_PSERIES */
  42
  43void rfi_flush_enable(bool enable);
  44
  45/* These are bit flags */
  46enum l1d_flush_type {
  47        L1D_FLUSH_NONE          = 0x1,
  48        L1D_FLUSH_FALLBACK      = 0x2,
  49        L1D_FLUSH_ORI           = 0x4,
  50        L1D_FLUSH_MTTRIG        = 0x8,
  51};
  52
  53void setup_rfi_flush(enum l1d_flush_type, bool enable);
  54void setup_entry_flush(bool enable);
  55void setup_uaccess_flush(bool enable);
  56void do_rfi_flush_fixups(enum l1d_flush_type types);
  57#ifdef CONFIG_PPC_BARRIER_NOSPEC
  58void setup_barrier_nospec(void);
  59#else
  60static inline void setup_barrier_nospec(void) { }
  61#endif
  62void do_uaccess_flush_fixups(enum l1d_flush_type types);
  63void do_entry_flush_fixups(enum l1d_flush_type types);
  64void do_barrier_nospec_fixups(bool enable);
  65extern bool barrier_nospec_enabled;
  66
  67#ifdef CONFIG_PPC_BARRIER_NOSPEC
  68void do_barrier_nospec_fixups_range(bool enable, void *start, void *end);
  69#else
  70static inline void do_barrier_nospec_fixups_range(bool enable, void *start, void *end) { }
  71#endif
  72
  73#ifdef CONFIG_PPC_FSL_BOOK3E
  74void setup_spectre_v2(void);
  75#else
  76static inline void setup_spectre_v2(void) {}
  77#endif
  78void do_btb_flush_fixups(void);
  79
  80#endif /* !__ASSEMBLY__ */
  81
  82#endif  /* _ASM_POWERPC_SETUP_H */
  83
  84