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Linux kernel mirror (for testing)
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linux
1#ifndef _ASM_POWERPC_MMU_H_
2#define _ASM_POWERPC_MMU_H_
3#ifdef __KERNEL__
4
5#include <linux/types.h>
6
7#include <asm/asm-compat.h>
8#include <asm/feature-fixups.h>
9
10/*
11 * MMU features bit definitions
12 */
13
14/*
15 * First half is MMU families
16 */
17#define MMU_FTR_HPTE_TABLE ASM_CONST(0x00000001)
18#define MMU_FTR_TYPE_8xx ASM_CONST(0x00000002)
19#define MMU_FTR_TYPE_40x ASM_CONST(0x00000004)
20#define MMU_FTR_TYPE_44x ASM_CONST(0x00000008)
21#define MMU_FTR_TYPE_FSL_E ASM_CONST(0x00000010)
22#define MMU_FTR_TYPE_3E ASM_CONST(0x00000020)
23#define MMU_FTR_TYPE_47x ASM_CONST(0x00000040)
24
25/*
26 * This is individual features
27 */
28
29/* Enable use of high BAT registers */
30#define MMU_FTR_USE_HIGH_BATS ASM_CONST(0x00010000)
31
32/* Enable >32-bit physical addresses on 32-bit processor, only used
33 * by CONFIG_6xx currently as BookE supports that from day 1
34 */
35#define MMU_FTR_BIG_PHYS ASM_CONST(0x00020000)
36
37/* Enable use of broadcast TLB invalidations. We don't always set it
38 * on processors that support it due to other constraints with the
39 * use of such invalidations
40 */
41#define MMU_FTR_USE_TLBIVAX_BCAST ASM_CONST(0x00040000)
42
43/* Enable use of tlbilx invalidate instructions.
44 */
45#define MMU_FTR_USE_TLBILX ASM_CONST(0x00080000)
46
47/* This indicates that the processor cannot handle multiple outstanding
48 * broadcast tlbivax or tlbsync. This makes the code use a spinlock
49 * around such invalidate forms.
50 */
51#define MMU_FTR_LOCK_BCAST_INVAL ASM_CONST(0x00100000)
52
53/* This indicates that the processor doesn't handle way selection
54 * properly and needs SW to track and update the LRU state. This
55 * is specific to an errata on e300c2/c3/c4 class parts
56 */
57#define MMU_FTR_NEED_DTLB_SW_LRU ASM_CONST(0x00200000)
58
59/* Enable use of TLB reservation. Processor should support tlbsrx.
60 * instruction and MAS0[WQ].
61 */
62#define MMU_FTR_USE_TLBRSRV ASM_CONST(0x00800000)
63
64/* Use paired MAS registers (MAS7||MAS3, etc.)
65 */
66#define MMU_FTR_USE_PAIRED_MAS ASM_CONST(0x01000000)
67
68/* MMU is SLB-based
69 */
70#define MMU_FTR_SLB ASM_CONST(0x02000000)
71
72/* Support 16M large pages
73 */
74#define MMU_FTR_16M_PAGE ASM_CONST(0x04000000)
75
76/* Supports TLBIEL variant
77 */
78#define MMU_FTR_TLBIEL ASM_CONST(0x08000000)
79
80/* Supports tlbies w/o locking
81 */
82#define MMU_FTR_LOCKLESS_TLBIE ASM_CONST(0x10000000)
83
84/* Large pages can be marked CI
85 */
86#define MMU_FTR_CI_LARGE_PAGE ASM_CONST(0x20000000)
87
88/* 1T segments available
89 */
90#define MMU_FTR_1T_SEGMENT ASM_CONST(0x40000000)
91
92/* Doesn't support the B bit (1T segment) in SLBIE
93 */
94#define MMU_FTR_NO_SLBIE_B ASM_CONST(0x80000000)
95
96/* MMU feature bit sets for various CPUs */
97#define MMU_FTRS_DEFAULT_HPTE_ARCH_V2 \
98 MMU_FTR_HPTE_TABLE | MMU_FTR_PPCAS_ARCH_V2
99#define MMU_FTRS_POWER4 MMU_FTRS_DEFAULT_HPTE_ARCH_V2
100#define MMU_FTRS_PPC970 MMU_FTRS_POWER4
101#define MMU_FTRS_POWER5 MMU_FTRS_POWER4 | MMU_FTR_LOCKLESS_TLBIE
102#define MMU_FTRS_POWER6 MMU_FTRS_POWER4 | MMU_FTR_LOCKLESS_TLBIE
103#define MMU_FTRS_POWER7 MMU_FTRS_POWER4 | MMU_FTR_LOCKLESS_TLBIE
104#define MMU_FTRS_CELL MMU_FTRS_DEFAULT_HPTE_ARCH_V2 | \
105 MMU_FTR_CI_LARGE_PAGE
106#define MMU_FTRS_PA6T MMU_FTRS_DEFAULT_HPTE_ARCH_V2 | \
107 MMU_FTR_CI_LARGE_PAGE | MMU_FTR_NO_SLBIE_B
108#define MMU_FTRS_A2 MMU_FTR_TYPE_3E | MMU_FTR_USE_TLBILX | \
109 MMU_FTR_USE_TLBIVAX_BCAST | \
110 MMU_FTR_LOCK_BCAST_INVAL | \
111 MMU_FTR_USE_TLBRSRV | \
112 MMU_FTR_USE_PAIRED_MAS | \
113 MMU_FTR_TLBIEL | \
114 MMU_FTR_16M_PAGE
115#ifndef __ASSEMBLY__
116#include <asm/cputable.h>
117
118#ifdef CONFIG_PPC_FSL_BOOK3E
119#include <asm/percpu.h>
120DECLARE_PER_CPU(int, next_tlbcam_idx);
121#endif
122
123static inline int mmu_has_feature(unsigned long feature)
124{
125 return (cur_cpu_spec->mmu_features & feature);
126}
127
128static inline void mmu_clear_feature(unsigned long feature)
129{
130 cur_cpu_spec->mmu_features &= ~feature;
131}
132
133extern unsigned int __start___mmu_ftr_fixup, __stop___mmu_ftr_fixup;
134
135/* MMU initialization */
136extern void early_init_mmu(void);
137extern void early_init_mmu_secondary(void);
138
139extern void setup_initial_memory_limit(phys_addr_t first_memblock_base,
140 phys_addr_t first_memblock_size);
141
142#ifdef CONFIG_PPC64
143/* This is our real memory area size on ppc64 server, on embedded, we
144 * make it match the size our of bolted TLB area
145 */
146extern u64 ppc64_rma_size;
147#endif /* CONFIG_PPC64 */
148
149#endif /* !__ASSEMBLY__ */
150
151/* The kernel use the constants below to index in the page sizes array.
152 * The use of fixed constants for this purpose is better for performances
153 * of the low level hash refill handlers.
154 *
155 * A non supported page size has a "shift" field set to 0
156 *
157 * Any new page size being implemented can get a new entry in here. Whether
158 * the kernel will use it or not is a different matter though. The actual page
159 * size used by hugetlbfs is not defined here and may be made variable
160 *
161 * Note: This array ended up being a false good idea as it's growing to the
162 * point where I wonder if we should replace it with something different,
163 * to think about, feedback welcome. --BenH.
164 */
165
166/* There are #define as they have to be used in assembly
167 *
168 * WARNING: If you change this list, make sure to update the array of
169 * names currently in arch/powerpc/mm/hugetlbpage.c or bad things will
170 * happen
171 */
172#define MMU_PAGE_4K 0
173#define MMU_PAGE_16K 1
174#define MMU_PAGE_64K 2
175#define MMU_PAGE_64K_AP 3 /* "Admixed pages" (hash64 only) */
176#define MMU_PAGE_256K 4
177#define MMU_PAGE_1M 5
178#define MMU_PAGE_4M 6
179#define MMU_PAGE_8M 7
180#define MMU_PAGE_16M 8
181#define MMU_PAGE_64M 9
182#define MMU_PAGE_256M 10
183#define MMU_PAGE_1G 11
184#define MMU_PAGE_16G 12
185#define MMU_PAGE_64G 13
186
187#define MMU_PAGE_COUNT 14
188
189#if defined(CONFIG_PPC_STD_MMU_64)
190/* 64-bit classic hash table MMU */
191# include <asm/mmu-hash64.h>
192#elif defined(CONFIG_PPC_STD_MMU_32)
193/* 32-bit classic hash table MMU */
194# include <asm/mmu-hash32.h>
195#elif defined(CONFIG_40x)
196/* 40x-style software loaded TLB */
197# include <asm/mmu-40x.h>
198#elif defined(CONFIG_44x)
199/* 44x-style software loaded TLB */
200# include <asm/mmu-44x.h>
201#elif defined(CONFIG_PPC_BOOK3E_MMU)
202/* Freescale Book-E software loaded TLB or Book-3e (ISA 2.06+) MMU */
203# include <asm/mmu-book3e.h>
204#elif defined (CONFIG_PPC_8xx)
205/* Motorola/Freescale 8xx software loaded TLB */
206# include <asm/mmu-8xx.h>
207#endif
208
209
210#endif /* __KERNEL__ */
211#endif /* _ASM_POWERPC_MMU_H_ */