xref: /openbmc/linux/arch/powerpc/mm/mmu_decl.h (revision 9523a0268924a918c4a246599ee0438e1c762a23)
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_64
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_64)
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_64) || 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  void print_system_hash_info(void);
86  
87  #endif /* CONFIG_PPC_MMU_NOHASH */
88  
89  #ifdef CONFIG_PPC32
90  
91  extern void mapin_ram(void);
92  extern void setbat(int index, unsigned long virt, phys_addr_t phys,
93  		   unsigned int size, pgprot_t prot);
94  
95  extern u8 early_hash[];
96  
97  #endif /* CONFIG_PPC32 */
98  
99  extern unsigned long __max_low_memory;
100  extern phys_addr_t total_memory;
101  extern phys_addr_t total_lowmem;
102  extern phys_addr_t memstart_addr;
103  extern phys_addr_t lowmem_end_addr;
104  
105  /* ...and now those things that may be slightly different between processor
106   * architectures.  -- Dan
107   */
108  #ifdef CONFIG_PPC32
109  extern void MMU_init_hw(void);
110  void MMU_init_hw_patch(void);
111  unsigned long mmu_mapin_ram(unsigned long base, unsigned long top);
112  #endif
113  void mmu_init_secondary(int cpu);
114  
115  #ifdef CONFIG_PPC_E500
116  extern unsigned long map_mem_in_cams(unsigned long ram, int max_cam_idx,
117  				     bool dryrun, bool init);
118  #ifdef CONFIG_PPC32
119  extern void adjust_total_lowmem(void);
120  extern int switch_to_as1(void);
121  extern void restore_to_as0(int esel, int offset, void *dt_ptr, int bootcpu);
122  void create_kaslr_tlb_entry(int entry, unsigned long virt, phys_addr_t phys);
123  void reloc_kernel_entry(void *fdt, int addr);
124  void relocate_init(u64 dt_ptr, phys_addr_t start);
125  extern int is_second_reloc;
126  #endif
127  extern void loadcam_entry(unsigned int index);
128  extern void loadcam_multi(int first_idx, int num, int tmp_idx);
129  
130  #ifdef CONFIG_RANDOMIZE_BASE
131  void kaslr_early_init(void *dt_ptr, phys_addr_t size);
132  void kaslr_late_init(void);
133  #else
134  static inline void kaslr_early_init(void *dt_ptr, phys_addr_t size) {}
135  static inline void kaslr_late_init(void) {}
136  #endif
137  
138  struct tlbcam {
139  	u32	MAS0;
140  	u32	MAS1;
141  	unsigned long	MAS2;
142  	u32	MAS3;
143  	u32	MAS7;
144  };
145  
146  #define NUM_TLBCAMS	64
147  
148  extern struct tlbcam TLBCAM[NUM_TLBCAMS];
149  #endif
150  
151  #if defined(CONFIG_PPC_BOOK3S_32) || defined(CONFIG_PPC_85xx) || defined(CONFIG_PPC_8xx)
152  /* 6xx have BATS */
153  /* PPC_85xx have TLBCAM */
154  /* 8xx have LTLB */
155  phys_addr_t v_block_mapped(unsigned long va);
156  unsigned long p_block_mapped(phys_addr_t pa);
157  #else
158  static inline phys_addr_t v_block_mapped(unsigned long va) { return 0; }
159  static inline unsigned long p_block_mapped(phys_addr_t pa) { return 0; }
160  #endif
161  
162  #if defined(CONFIG_PPC_BOOK3S_32) || defined(CONFIG_PPC_8xx) || defined(CONFIG_PPC_E500)
163  void mmu_mark_initmem_nx(void);
164  void mmu_mark_rodata_ro(void);
165  #else
166  static inline void mmu_mark_initmem_nx(void) { }
167  static inline void mmu_mark_rodata_ro(void) { }
168  #endif
169  
170  #ifdef CONFIG_PPC_8xx
171  void __init mmu_mapin_immr(void);
172  #endif
173  
174  #ifdef CONFIG_DEBUG_WX
175  void ptdump_check_wx(void);
176  #else
177  static inline void ptdump_check_wx(void) { }
178  #endif
179  
180  static inline bool debug_pagealloc_enabled_or_kfence(void)
181  {
182  	return IS_ENABLED(CONFIG_KFENCE) || debug_pagealloc_enabled();
183  }
184  
185  #ifdef CONFIG_MEMORY_HOTPLUG
186  int create_section_mapping(unsigned long start, unsigned long end,
187  			   int nid, pgprot_t prot);
188  #endif
189