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 #else /* CONFIG_40x || CONFIG_8xx */
40 extern void _tlbil_all(void);
41 extern void _tlbil_pid(unsigned int pid);
42 #endif /* !(CONFIG_40x || CONFIG_8xx) */
43
44 /*
45 * On 8xx, we directly inline tlbie, on others, it's extern
46 */
47 #ifdef CONFIG_8xx
_tlbil_va(unsigned long address,unsigned int pid)48 static inline void _tlbil_va(unsigned long address, unsigned int pid)
49 {
50 asm volatile ("tlbie %0; sync" : : "r" (address) : "memory");
51 }
52 #else /* CONFIG_8xx */
53 extern void _tlbil_va(unsigned long address, unsigned int pid);
54 #endif /* CONIFG_8xx */
55
56 /*
57 * As of today, we don't support tlbivax broadcast on any
58 * implementation. When that becomes the case, this will be
59 * an extern.
60 */
_tlbivax_bcast(unsigned long address,unsigned int pid)61 static inline void _tlbivax_bcast(unsigned long address, unsigned int pid)
62 {
63 BUG();
64 }
65
66 #else /* CONFIG_PPC_MMU_NOHASH */
67
68 extern void hash_preload(struct mm_struct *mm, unsigned long ea,
69 unsigned long access, unsigned long trap);
70
71
72 extern void _tlbie(unsigned long address);
73 extern void _tlbia(void);
74
75 #endif /* CONFIG_PPC_MMU_NOHASH */
76
77 #ifdef CONFIG_PPC32
78
79 struct tlbcam {
80 u32 MAS0;
81 u32 MAS1;
82 u32 MAS2;
83 u32 MAS3;
84 u32 MAS7;
85 };
86
87 extern void mapin_ram(void);
88 extern int map_page(unsigned long va, phys_addr_t pa, int flags);
89 extern void setbat(int index, unsigned long virt, phys_addr_t phys,
90 unsigned int size, int flags);
91 extern void settlbcam(int index, unsigned long virt, phys_addr_t phys,
92 unsigned int size, int flags, unsigned int pid);
93 extern void invalidate_tlbcam_entry(int index);
94
95 extern int __map_without_bats;
96 extern unsigned long ioremap_base;
97 extern unsigned int rtas_data, rtas_size;
98
99 struct hash_pte;
100 extern struct hash_pte *Hash, *Hash_end;
101 extern unsigned long Hash_size, Hash_mask;
102 #endif
103
104 extern unsigned long ioremap_bot;
105 extern unsigned long __max_low_memory;
106 extern phys_addr_t __initial_memory_limit_addr;
107 extern phys_addr_t total_memory;
108 extern phys_addr_t total_lowmem;
109 extern phys_addr_t memstart_addr;
110 extern phys_addr_t lowmem_end_addr;
111
112 /* ...and now those things that may be slightly different between processor
113 * architectures. -- Dan
114 */
115 #if defined(CONFIG_8xx)
116 #define MMU_init_hw() do { } while(0)
117 #define mmu_mapin_ram() (0UL)
118
119 #elif defined(CONFIG_4xx)
120 extern void MMU_init_hw(void);
121 extern unsigned long mmu_mapin_ram(void);
122
123 #elif defined(CONFIG_FSL_BOOKE)
124 extern void MMU_init_hw(void);
125 extern unsigned long mmu_mapin_ram(void);
126 extern void adjust_total_lowmem(void);
127
128 #elif defined(CONFIG_PPC32)
129 /* anything 32-bit except 4xx or 8xx */
130 extern void MMU_init_hw(void);
131 extern unsigned long mmu_mapin_ram(void);
132 #endif
133