arch/powerpc/mm/mmu_decl.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * Declarations of procedures and variables shared between files
   4  * in arch/ppc/mm/.
   5  *
   6  *  Derived from arch/ppc/mm/init.c:
   7  *    Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
   8  *
   9  *  Modifications by Paul Mackerras (PowerMac) (paulus@cs.anu.edu.au)
  10  *  and Cort Dougan (PReP) (cort@cs.nmt.edu)
  11  *    Copyright (C) 1996 Paul Mackerras
  12  *
  13  *  Derived from "arch/i386/mm/init.c"
  14  *    Copyright (C) 1991, 1992, 1993, 1994  Linus Torvalds
  15  */
  16 #include <linux/mm.h>
  17 #include <asm/mmu.h>
  18
  19 #ifdef CONFIG_PPC_MMU_NOHASH
  20 #include <asm/trace.h>
  21
  22 /*
  23  * On 40x and 8xx, we directly inline tlbia and tlbivax
  24  */
  25 #if defined(CONFIG_40x) || defined(CONFIG_PPC_8xx)
  26 static inline void _tlbil_all(void)
  27 {
  28         asm volatile ("sync; tlbia; isync" : : : "memory");
  29         trace_tlbia(MMU_NO_CONTEXT);
  30 }
  31 static inline void _tlbil_pid(unsigned int pid)
  32 {
  33         asm volatile ("sync; tlbia; isync" : : : "memory");
  34         trace_tlbia(pid);
  35 }
  36 #define _tlbil_pid_noind(pid)   _tlbil_pid(pid)
  37
  38 #else /* CONFIG_40x || CONFIG_PPC_8xx */
  39 extern void _tlbil_all(void);
  40 extern void _tlbil_pid(unsigned int pid);
  41 #ifdef CONFIG_PPC_BOOK3E
  42 extern void _tlbil_pid_noind(unsigned int pid);
  43 #else
  44 #define _tlbil_pid_noind(pid)   _tlbil_pid(pid)
  45 #endif
  46 #endif /* !(CONFIG_40x || CONFIG_PPC_8xx) */
  47
  48 /*
  49  * On 8xx, we directly inline tlbie, on others, it's extern
  50  */
  51 #ifdef CONFIG_PPC_8xx
  52 static inline void _tlbil_va(unsigned long address, unsigned int pid,
  53                              unsigned int tsize, unsigned int ind)
  54 {
  55         asm volatile ("tlbie %0; sync" : : "r" (address) : "memory");
  56         trace_tlbie(0, 0, address, pid, 0, 0, 0);
  57 }
  58 #elif defined(CONFIG_PPC_BOOK3E)
  59 extern void _tlbil_va(unsigned long address, unsigned int pid,
  60                       unsigned int tsize, unsigned int ind);
  61 #else
  62 extern void __tlbil_va(unsigned long address, unsigned int pid);
  63 static inline void _tlbil_va(unsigned long address, unsigned int pid,
  64                              unsigned int tsize, unsigned int ind)
  65 {
  66         __tlbil_va(address, pid);
  67 }
  68 #endif /* CONFIG_PPC_8xx */
  69
  70 #if defined(CONFIG_PPC_BOOK3E) || defined(CONFIG_PPC_47x)
  71 extern void _tlbivax_bcast(unsigned long address, unsigned int pid,
  72                            unsigned int tsize, unsigned int ind);
  73 #else
  74 static inline void _tlbivax_bcast(unsigned long address, unsigned int pid,
  75                                    unsigned int tsize, unsigned int ind)
  76 {
  77         BUG();
  78 }
  79 #endif
  80
  81 static inline void print_system_hash_info(void) {}
  82
  83 #else /* CONFIG_PPC_MMU_NOHASH */
  84
  85 extern void _tlbie(unsigned long address);
  86 extern void _tlbia(void);
  87
  88 void print_system_hash_info(void);
  89
  90 #endif /* CONFIG_PPC_MMU_NOHASH */
  91
  92 #ifdef CONFIG_PPC32
  93
  94 void hash_preload(struct mm_struct *mm, unsigned long ea);
  95
  96 extern void mapin_ram(void);
  97 extern void setbat(int index, unsigned long virt, phys_addr_t phys,
  98                    unsigned int size, pgprot_t prot);
  99
 100 extern int __map_without_bats;
 101 extern unsigned int rtas_data, rtas_size;
 102
 103 struct hash_pte;
 104 extern struct hash_pte *Hash;
 105 extern u8 early_hash[];
 106
 107 #endif /* CONFIG_PPC32 */
 108
 109 extern unsigned long __max_low_memory;
 110 extern phys_addr_t __initial_memory_limit_addr;
 111 extern phys_addr_t total_memory;
 112 extern phys_addr_t total_lowmem;
 113 extern phys_addr_t memstart_addr;
 114 extern phys_addr_t lowmem_end_addr;
 115
 116 #ifdef CONFIG_WII
 117 extern unsigned long wii_hole_start;
 118 extern unsigned long wii_hole_size;
 119
 120 extern unsigned long wii_mmu_mapin_mem2(unsigned long top);
 121 extern void wii_memory_fixups(void);
 122 #endif
 123
 124 /* ...and now those things that may be slightly different between processor
 125  * architectures.  -- Dan
 126  */
 127 #ifdef CONFIG_PPC32
 128 extern void MMU_init_hw(void);
 129 void MMU_init_hw_patch(void);
 130 unsigned long mmu_mapin_ram(unsigned long base, unsigned long top);
 131 #endif
 132
 133 #ifdef CONFIG_PPC_FSL_BOOK3E
 134 extern unsigned long map_mem_in_cams(unsigned long ram, int max_cam_idx,
 135                                      bool dryrun);
 136 extern unsigned long calc_cam_sz(unsigned long ram, unsigned long virt,
 137                                  phys_addr_t phys);
 138 #ifdef CONFIG_PPC32
 139 extern void adjust_total_lowmem(void);
 140 extern int switch_to_as1(void);
 141 extern void restore_to_as0(int esel, int offset, void *dt_ptr, int bootcpu);
 142 void create_kaslr_tlb_entry(int entry, unsigned long virt, phys_addr_t phys);
 143 void reloc_kernel_entry(void *fdt, int addr);
 144 extern int is_second_reloc;
 145 #endif
 146 extern void loadcam_entry(unsigned int index);
 147 extern void loadcam_multi(int first_idx, int num, int tmp_idx);
 148
 149 #ifdef CONFIG_RANDOMIZE_BASE
 150 void kaslr_early_init(void *dt_ptr, phys_addr_t size);
 151 void kaslr_late_init(void);
 152 #else
 153 static inline void kaslr_early_init(void *dt_ptr, phys_addr_t size) {}
 154 static inline void kaslr_late_init(void) {}
 155 #endif
 156
 157 struct tlbcam {
 158         u32     MAS0;
 159         u32     MAS1;
 160         unsigned long   MAS2;
 161         u32     MAS3;
 162         u32     MAS7;
 163 };
 164 #endif
 165
 166 #if defined(CONFIG_PPC_BOOK3S_32) || defined(CONFIG_FSL_BOOKE) || defined(CONFIG_PPC_8xx)
 167 /* 6xx have BATS */
 168 /* FSL_BOOKE have TLBCAM */
 169 /* 8xx have LTLB */
 170 phys_addr_t v_block_mapped(unsigned long va);
 171 unsigned long p_block_mapped(phys_addr_t pa);
 172 #else
 173 static inline phys_addr_t v_block_mapped(unsigned long va) { return 0; }
 174 static inline unsigned long p_block_mapped(phys_addr_t pa) { return 0; }
 175 #endif
 176
 177 #if defined(CONFIG_PPC_BOOK3S_32) || defined(CONFIG_PPC_8xx)
 178 void mmu_mark_initmem_nx(void);
 179 void mmu_mark_rodata_ro(void);
 180 #else
 181 static inline void mmu_mark_initmem_nx(void) { }
 182 static inline void mmu_mark_rodata_ro(void) { }
 183 #endif
 184
 185 #ifdef CONFIG_PPC_DEBUG_WX
 186 void ptdump_check_wx(void);
 187 #else
 188 static inline void ptdump_check_wx(void) { }
 189 #endif