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)
_tlbil_all(void)26 static inline void _tlbil_all(void)
27 {
28 	asm volatile ("sync; tlbia; isync" : : : "memory");
29 	trace_tlbia(MMU_NO_CONTEXT);
30 }
_tlbil_pid(unsigned int pid)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
_tlbil_va(unsigned long address,unsigned int pid,unsigned int tsize,unsigned int ind)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);
_tlbil_va(unsigned long address,unsigned int pid,unsigned int tsize,unsigned int ind)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
_tlbivax_bcast(unsigned long address,unsigned int pid,unsigned int tsize,unsigned int ind)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 
print_system_hash_info(void)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 int __map_without_bats;
96 extern unsigned int rtas_data, rtas_size;
97 
98 struct hash_pte;
99 extern u8 early_hash[];
100 
101 #endif /* CONFIG_PPC32 */
102 
103 extern unsigned long __max_low_memory;
104 extern phys_addr_t __initial_memory_limit_addr;
105 extern phys_addr_t total_memory;
106 extern phys_addr_t total_lowmem;
107 extern phys_addr_t memstart_addr;
108 extern phys_addr_t lowmem_end_addr;
109 
110 #ifdef CONFIG_WII
111 extern unsigned long wii_hole_start;
112 extern unsigned long wii_hole_size;
113 
114 extern unsigned long wii_mmu_mapin_mem2(unsigned long top);
115 extern 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
122 extern void MMU_init_hw(void);
123 void MMU_init_hw_patch(void);
124 unsigned long mmu_mapin_ram(unsigned long base, unsigned long top);
125 #endif
126 
127 #ifdef CONFIG_PPC_FSL_BOOK3E
128 extern unsigned long map_mem_in_cams(unsigned long ram, int max_cam_idx,
129 				     bool dryrun, bool init);
130 extern unsigned long calc_cam_sz(unsigned long ram, unsigned long virt,
131 				 phys_addr_t phys);
132 #ifdef CONFIG_PPC32
133 extern void adjust_total_lowmem(void);
134 extern int switch_to_as1(void);
135 extern void restore_to_as0(int esel, int offset, void *dt_ptr, int bootcpu);
136 void create_kaslr_tlb_entry(int entry, unsigned long virt, phys_addr_t phys);
137 void reloc_kernel_entry(void *fdt, int addr);
138 extern int is_second_reloc;
139 #endif
140 extern void loadcam_entry(unsigned int index);
141 extern void loadcam_multi(int first_idx, int num, int tmp_idx);
142 
143 #ifdef CONFIG_RANDOMIZE_BASE
144 void kaslr_early_init(void *dt_ptr, phys_addr_t size);
145 void kaslr_late_init(void);
146 #else
kaslr_early_init(void * dt_ptr,phys_addr_t size)147 static inline void kaslr_early_init(void *dt_ptr, phys_addr_t size) {}
kaslr_late_init(void)148 static inline void kaslr_late_init(void) {}
149 #endif
150 
151 struct 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 */
164 phys_addr_t v_block_mapped(unsigned long va);
165 unsigned long p_block_mapped(phys_addr_t pa);
166 #else
v_block_mapped(unsigned long va)167 static inline phys_addr_t v_block_mapped(unsigned long va) { return 0; }
p_block_mapped(phys_addr_t pa)168 static 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) || defined(CONFIG_PPC_FSL_BOOK3E)
172 void mmu_mark_initmem_nx(void);
173 void mmu_mark_rodata_ro(void);
174 #else
mmu_mark_initmem_nx(void)175 static inline void mmu_mark_initmem_nx(void) { }
mmu_mark_rodata_ro(void)176 static inline void mmu_mark_rodata_ro(void) { }
177 #endif
178 
179 #ifdef CONFIG_PPC_8xx
180 void __init mmu_mapin_immr(void);
181 #endif
182 
183 #ifdef CONFIG_DEBUG_WX
184 void ptdump_check_wx(void);
185 #else
ptdump_check_wx(void)186 static inline void ptdump_check_wx(void) { }
187 #endif
188 
debug_pagealloc_enabled_or_kfence(void)189 static inline bool debug_pagealloc_enabled_or_kfence(void)
190 {
191 	return IS_ENABLED(CONFIG_KFENCE) || debug_pagealloc_enabled();
192 }
193