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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_PPC_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}
1/*
2 * Declarations of procedures and variables shared between files
3 * in arch/ppc/mm/.
4 *
5 * Derived from arch/ppc/mm/init.c:
6 * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
7 *
8 * Modifications by Paul Mackerras (PowerMac) (paulus@cs.anu.edu.au)
9 * and Cort Dougan (PReP) (cort@cs.nmt.edu)
10 * Copyright (C) 1996 Paul Mackerras
11 *
12 * Derived from "arch/i386/mm/init.c"
13 * Copyright (C) 1991, 1992, 1993, 1994 Linus Torvalds
14 *
15 * This program is free software; you can redistribute it and/or
16 * modify it under the terms of the GNU General Public License
17 * as published by the Free Software Foundation; either version
18 * 2 of the License, or (at your option) any later version.
19 *
20 */
21#include <linux/mm.h>
22#include <asm/tlbflush.h>
23#include <asm/mmu.h>
24
25#ifdef CONFIG_PPC_MMU_NOHASH
26
27/*
28 * On 40x and 8xx, we directly inline tlbia and tlbivax
29 */
30#if defined(CONFIG_40x) || defined(CONFIG_8xx)
31static inline void _tlbil_all(void)
32{
33 asm volatile ("sync; tlbia; isync" : : : "memory");
34}
35static inline void _tlbil_pid(unsigned int pid)
36{
37 asm volatile ("sync; tlbia; isync" : : : "memory");
38}
39#define _tlbil_pid_noind(pid) _tlbil_pid(pid)
40
41#else /* CONFIG_40x || CONFIG_8xx */
42extern void _tlbil_all(void);
43extern void _tlbil_pid(unsigned int pid);
44#ifdef CONFIG_PPC_BOOK3E
45extern void _tlbil_pid_noind(unsigned int pid);
46#else
47#define _tlbil_pid_noind(pid) _tlbil_pid(pid)
48#endif
49#endif /* !(CONFIG_40x || CONFIG_8xx) */
50
51/*
52 * On 8xx, we directly inline tlbie, on others, it's extern
53 */
54#ifdef CONFIG_8xx
55static inline void _tlbil_va(unsigned long address, unsigned int pid,
56 unsigned int tsize, unsigned int ind)
57{
58 asm volatile ("tlbie %0; sync" : : "r" (address) : "memory");
59}
60#elif defined(CONFIG_PPC_BOOK3E)
61extern void _tlbil_va(unsigned long address, unsigned int pid,
62 unsigned int tsize, unsigned int ind);
63#else
64extern void __tlbil_va(unsigned long address, unsigned int pid);
65static inline void _tlbil_va(unsigned long address, unsigned int pid,
66 unsigned int tsize, unsigned int ind)
67{
68 __tlbil_va(address, pid);
69}
70#endif /* CONIFG_8xx */
71
72#if defined(CONFIG_PPC_BOOK3E) || defined(CONFIG_PPC_47x)
73extern void _tlbivax_bcast(unsigned long address, unsigned int pid,
74 unsigned int tsize, unsigned int ind);
75#else
76static inline void _tlbivax_bcast(unsigned long address, unsigned int pid,
77 unsigned int tsize, unsigned int ind)
78{
79 BUG();
80}
81#endif
82
83#else /* CONFIG_PPC_MMU_NOHASH */
84
85extern void hash_preload(struct mm_struct *mm, unsigned long ea,
86 unsigned long access, unsigned long trap);
87
88
89extern void _tlbie(unsigned long address);
90extern void _tlbia(void);
91
92#endif /* CONFIG_PPC_MMU_NOHASH */
93
94#ifdef CONFIG_PPC32
95
96extern void mapin_ram(void);
97extern int map_page(unsigned long va, phys_addr_t pa, int flags);
98extern void setbat(int index, unsigned long virt, phys_addr_t phys,
99 unsigned int size, int flags);
100
101extern int __map_without_bats;
102extern int __allow_ioremap_reserved;
103extern unsigned long ioremap_base;
104extern unsigned int rtas_data, rtas_size;
105
106struct hash_pte;
107extern struct hash_pte *Hash, *Hash_end;
108extern unsigned long Hash_size, Hash_mask;
109
110#endif /* CONFIG_PPC32 */
111
112#ifdef CONFIG_PPC64
113extern int map_kernel_page(unsigned long ea, unsigned long pa, int flags);
114#endif /* CONFIG_PPC64 */
115
116extern unsigned long ioremap_bot;
117extern unsigned long __max_low_memory;
118extern phys_addr_t __initial_memory_limit_addr;
119extern phys_addr_t total_memory;
120extern phys_addr_t total_lowmem;
121extern phys_addr_t memstart_addr;
122extern phys_addr_t lowmem_end_addr;
123
124#ifdef CONFIG_WII
125extern unsigned long wii_hole_start;
126extern unsigned long wii_hole_size;
127
128extern unsigned long wii_mmu_mapin_mem2(unsigned long top);
129extern void wii_memory_fixups(void);
130#endif
131
132/* ...and now those things that may be slightly different between processor
133 * architectures. -- Dan
134 */
135#if defined(CONFIG_8xx)
136#define MMU_init_hw() do { } while(0)
137#define mmu_mapin_ram(top) (0UL)
138
139#elif defined(CONFIG_4xx)
140extern void MMU_init_hw(void);
141extern unsigned long mmu_mapin_ram(unsigned long top);
142
143#elif defined(CONFIG_PPC_FSL_BOOK3E)
144extern unsigned long map_mem_in_cams(unsigned long ram, int max_cam_idx);
145#ifdef CONFIG_PPC32
146extern void MMU_init_hw(void);
147extern unsigned long mmu_mapin_ram(unsigned long top);
148extern void adjust_total_lowmem(void);
149#endif
150extern void loadcam_entry(unsigned int index);
151
152struct tlbcam {
153 u32 MAS0;
154 u32 MAS1;
155 unsigned long MAS2;
156 u32 MAS3;
157 u32 MAS7;
158};
159#elif defined(CONFIG_PPC32)
160/* anything 32-bit except 4xx or 8xx */
161extern void MMU_init_hw(void);
162extern unsigned long mmu_mapin_ram(unsigned long top);
163#endif