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)
_tlbil_all(void)31 static inline void _tlbil_all(void)
32 {
33 asm volatile ("sync; tlbia; isync" : : : "memory");
34 }
_tlbil_pid(unsigned int pid)35 static 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 */
42 extern void _tlbil_all(void);
43 extern void _tlbil_pid(unsigned int pid);
44 #ifdef CONFIG_PPC_BOOK3E
45 extern 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
_tlbil_va(unsigned long address,unsigned int pid,unsigned int tsize,unsigned int ind)55 static 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)
61 extern void _tlbil_va(unsigned long address, unsigned int pid,
62 unsigned int tsize, unsigned int ind);
63 #else
64 extern void __tlbil_va(unsigned long address, unsigned int pid);
_tlbil_va(unsigned long address,unsigned int pid,unsigned int tsize,unsigned int ind)65 static 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 /* CONFIG_8xx */
71
72 #if defined(CONFIG_PPC_BOOK3E) || defined(CONFIG_PPC_47x)
73 extern void _tlbivax_bcast(unsigned long address, unsigned int pid,
74 unsigned int tsize, unsigned int ind);
75 #else
_tlbivax_bcast(unsigned long address,unsigned int pid,unsigned int tsize,unsigned int ind)76 static 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
85 extern void hash_preload(struct mm_struct *mm, unsigned long ea,
86 unsigned long access, unsigned long trap);
87
88
89 extern void _tlbie(unsigned long address);
90 extern void _tlbia(void);
91
92 #endif /* CONFIG_PPC_MMU_NOHASH */
93
94 #ifdef CONFIG_PPC32
95
96 extern void mapin_ram(void);
97 extern int map_page(unsigned long va, phys_addr_t pa, int flags);
98 extern void setbat(int index, unsigned long virt, phys_addr_t phys,
99 unsigned int size, pgprot_t prot);
100
101 extern int __map_without_bats;
102 extern int __allow_ioremap_reserved;
103 extern unsigned long ioremap_base;
104 extern unsigned int rtas_data, rtas_size;
105
106 struct hash_pte;
107 extern struct hash_pte *Hash, *Hash_end;
108 extern unsigned long Hash_size, Hash_mask;
109
110 #endif /* CONFIG_PPC32 */
111
112 #ifdef CONFIG_PPC64
113 extern int map_kernel_page(unsigned long ea, unsigned long pa, int flags);
114 #endif /* CONFIG_PPC64 */
115
116 extern unsigned long ioremap_bot;
117 extern unsigned long __max_low_memory;
118 extern phys_addr_t __initial_memory_limit_addr;
119 extern phys_addr_t total_memory;
120 extern phys_addr_t total_lowmem;
121 extern phys_addr_t memstart_addr;
122 extern phys_addr_t lowmem_end_addr;
123
124 #ifdef CONFIG_WII
125 extern unsigned long wii_hole_start;
126 extern unsigned long wii_hole_size;
127
128 extern unsigned long wii_mmu_mapin_mem2(unsigned long top);
129 extern 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)
140 extern void MMU_init_hw(void);
141 extern unsigned long mmu_mapin_ram(unsigned long top);
142
143 #elif defined(CONFIG_PPC_FSL_BOOK3E)
144 extern unsigned long map_mem_in_cams(unsigned long ram, int max_cam_idx,
145 bool dryrun);
146 extern unsigned long calc_cam_sz(unsigned long ram, unsigned long virt,
147 phys_addr_t phys);
148 #ifdef CONFIG_PPC32
149 extern void MMU_init_hw(void);
150 extern unsigned long mmu_mapin_ram(unsigned long top);
151 extern void adjust_total_lowmem(void);
152 extern int switch_to_as1(void);
153 extern void restore_to_as0(int esel, int offset, void *dt_ptr, int bootcpu);
154 #endif
155 extern void loadcam_entry(unsigned int index);
156 extern void loadcam_multi(int first_idx, int num, int tmp_idx);
157
158 struct tlbcam {
159 u32 MAS0;
160 u32 MAS1;
161 unsigned long MAS2;
162 u32 MAS3;
163 u32 MAS7;
164 };
165 #elif defined(CONFIG_PPC32)
166 /* anything 32-bit except 4xx or 8xx */
167 extern void MMU_init_hw(void);
168 extern unsigned long mmu_mapin_ram(unsigned long top);
169 #endif
170