LXR linux/arch/powerpc/mm/mmu

   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)
  26static inline void _tlbil_all(void)
  27{
  28        asm volatile ("sync; tlbia; isync" : : : "memory");
  29        trace_tlbia(MMU_NO_CONTEXT);
  30}
  31static 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 */
  39extern void _tlbil_all(void);
  40extern void _tlbil_pid(unsigned int pid);
  41#ifdef CONFIG_PPC_BOOK3E
  42extern 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
  52static 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)
  59extern void _tlbil_va(unsigned long address, unsigned int pid,
  60                      unsigned int tsize, unsigned int ind);
  61#else
  62extern void __tlbil_va(unsigned long address, unsigned int pid);
  63static 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)
  71extern void _tlbivax_bcast(unsigned long address, unsigned int pid,
  72                           unsigned int tsize, unsigned int ind);
  73#else
  74static inline void _tlbivax_bcast(unsigned long address, unsigned int pid,
  75                                   unsigned int tsize, unsigned int ind)
  76{
  77        BUG();
  78}
  79#endif
  80
  81static inline void print_system_hash_info(void) {}
  82
  83#else /* CONFIG_PPC_MMU_NOHASH */
  84
  85void print_system_hash_info(void);
  86
  87#endif /* CONFIG_PPC_MMU_NOHASH */
  88
  89#ifdef CONFIG_PPC32
  90
  91extern void mapin_ram(void);
  92extern void setbat(int index, unsigned long virt, phys_addr_t phys,
  93                   unsigned int size, pgprot_t prot);
  94
  95extern int __map_without_bats;
  96extern unsigned int rtas_data, rtas_size;
  97
  98struct hash_pte;
  99extern u8 early_hash[];
 100
 101#endif /* CONFIG_PPC32 */
 102
 103extern unsigned long __max_low_memory;
 104extern phys_addr_t __initial_memory_limit_addr;
 105extern phys_addr_t total_memory;
 106extern phys_addr_t total_lowmem;
 107extern phys_addr_t memstart_addr;
 108extern phys_addr_t lowmem_end_addr;
 109
 110#ifdef CONFIG_WII
 111extern unsigned long wii_hole_start;
 112extern unsigned long wii_hole_size;
 113
 114extern unsigned long wii_mmu_mapin_mem2(unsigned long top);
 115extern void wii_memory_fixups(void);
 116#endif
 117
 118/* ...and now those things that may be slightly different between processor
 119 * architectures.  -- Dan
 120 */
 121#ifdef CONFIG_PPC32
 122extern void MMU_init_hw(void);
 123void MMU_init_hw_patch(void);
 124unsigned long mmu_mapin_ram(unsigned long base, unsigned long top);
 125#endif
 126
 127#ifdef CONFIG_PPC_FSL_BOOK3E
 128extern unsigned long map_mem_in_cams(unsigned long ram, int max_cam_idx,
 129                                     bool dryrun);
 130extern unsigned long calc_cam_sz(unsigned long ram, unsigned long virt,
 131                                 phys_addr_t phys);
 132#ifdef CONFIG_PPC32
 133extern void adjust_total_lowmem(void);
 134extern int switch_to_as1(void);
 135extern void restore_to_as0(int esel, int offset, void *dt_ptr, int bootcpu);
 136void create_kaslr_tlb_entry(int entry, unsigned long virt, phys_addr_t phys);
 137void reloc_kernel_entry(void *fdt, int addr);
 138extern int is_second_reloc;
 139#endif
 140extern void loadcam_entry(unsigned int index);
 141extern void loadcam_multi(int first_idx, int num, int tmp_idx);
 142
 143#ifdef CONFIG_RANDOMIZE_BASE
 144void kaslr_early_init(void *dt_ptr, phys_addr_t size);
 145void kaslr_late_init(void);
 146#else
 147static inline void kaslr_early_init(void *dt_ptr, phys_addr_t size) {}
 148static inline void kaslr_late_init(void) {}
 149#endif
 150
 151struct tlbcam {
 152        u32     MAS0;
 153        u32     MAS1;
 154        unsigned long   MAS2;
 155        u32     MAS3;
 156        u32     MAS7;
 157};
 158#endif
 159
 160#if defined(CONFIG_PPC_BOOK3S_32) || defined(CONFIG_FSL_BOOKE) || defined(CONFIG_PPC_8xx)
 161/* 6xx have BATS */
 162/* FSL_BOOKE have TLBCAM */
 163/* 8xx have LTLB */
 164phys_addr_t v_block_mapped(unsigned long va);
 165unsigned long p_block_mapped(phys_addr_t pa);
 166#else
 167static inline phys_addr_t v_block_mapped(unsigned long va) { return 0; }
 168static inline unsigned long p_block_mapped(phys_addr_t pa) { return 0; }
 169#endif
 170
 171#if defined(CONFIG_PPC_BOOK3S_32) || defined(CONFIG_PPC_8xx)
 172void mmu_mark_initmem_nx(void);
 173void mmu_mark_rodata_ro(void);
 174#else
 175static inline void mmu_mark_initmem_nx(void) { }
 176static inline void mmu_mark_rodata_ro(void) { }
 177#endif
 178
 179#ifdef CONFIG_PPC_8xx
 180void __init mmu_mapin_immr(void);
 181#endif
 182
 183#ifdef CONFIG_DEBUG_WX
 184void ptdump_check_wx(void);
 185#else
 186static inline void ptdump_check_wx(void) { }
 187#endif
 188
 189static inline bool debug_pagealloc_enabled_or_kfence(void)
 190{
 191        return IS_ENABLED(CONFIG_KFENCE) || debug_pagealloc_enabled();
 192}
 193