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1 | #ifndef __MMU_H |
2 | #define __MMU_H | |
3 | ||
4 | #include <linux/const.h> | |
5 | #include <asm/page.h> | |
6 | #include <asm/hypervisor.h> | |
7 | ||
8 | #define CTX_NR_BITS 13 | |
9 | ||
10 | #define TAG_CONTEXT_BITS ((_AC(1,UL) << CTX_NR_BITS) - _AC(1,UL)) | |
11 | ||
12 | /* UltraSPARC-III+ and later have a feature whereby you can | |
13 | * select what page size the various Data-TLB instances in the | |
14 | * chip. In order to gracefully support this, we put the version | |
15 | * field in a spot outside of the areas of the context register | |
16 | * where this parameter is specified. | |
17 | */ | |
18 | #define CTX_VERSION_SHIFT 22 | |
19 | #define CTX_VERSION_MASK ((~0UL) << CTX_VERSION_SHIFT) | |
20 | ||
21 | #define CTX_PGSZ_8KB _AC(0x0,UL) | |
22 | #define CTX_PGSZ_64KB _AC(0x1,UL) | |
23 | #define CTX_PGSZ_512KB _AC(0x2,UL) | |
24 | #define CTX_PGSZ_4MB _AC(0x3,UL) | |
25 | #define CTX_PGSZ_BITS _AC(0x7,UL) | |
26 | #define CTX_PGSZ0_NUC_SHIFT 61 | |
27 | #define CTX_PGSZ1_NUC_SHIFT 58 | |
28 | #define CTX_PGSZ0_SHIFT 16 | |
29 | #define CTX_PGSZ1_SHIFT 19 | |
30 | #define CTX_PGSZ_MASK ((CTX_PGSZ_BITS << CTX_PGSZ0_SHIFT) | \ | |
31 | (CTX_PGSZ_BITS << CTX_PGSZ1_SHIFT)) | |
32 | ||
33 | #if defined(CONFIG_SPARC64_PAGE_SIZE_8KB) | |
34 | #define CTX_PGSZ_BASE CTX_PGSZ_8KB | |
35 | #elif defined(CONFIG_SPARC64_PAGE_SIZE_64KB) | |
36 | #define CTX_PGSZ_BASE CTX_PGSZ_64KB | |
f5e706ad SR |
37 | #else |
38 | #error No page size specified in kernel configuration | |
39 | #endif | |
40 | ||
41 | #if defined(CONFIG_HUGETLB_PAGE_SIZE_4MB) | |
42 | #define CTX_PGSZ_HUGE CTX_PGSZ_4MB | |
43 | #elif defined(CONFIG_HUGETLB_PAGE_SIZE_512K) | |
44 | #define CTX_PGSZ_HUGE CTX_PGSZ_512KB | |
45 | #elif defined(CONFIG_HUGETLB_PAGE_SIZE_64K) | |
46 | #define CTX_PGSZ_HUGE CTX_PGSZ_64KB | |
47 | #endif | |
48 | ||
49 | #define CTX_PGSZ_KERN CTX_PGSZ_4MB | |
50 | ||
51 | /* Thus, when running on UltraSPARC-III+ and later, we use the following | |
52 | * PRIMARY_CONTEXT register values for the kernel context. | |
53 | */ | |
54 | #define CTX_CHEETAH_PLUS_NUC \ | |
55 | ((CTX_PGSZ_KERN << CTX_PGSZ0_NUC_SHIFT) | \ | |
56 | (CTX_PGSZ_BASE << CTX_PGSZ1_NUC_SHIFT)) | |
57 | ||
58 | #define CTX_CHEETAH_PLUS_CTX0 \ | |
59 | ((CTX_PGSZ_KERN << CTX_PGSZ0_SHIFT) | \ | |
60 | (CTX_PGSZ_BASE << CTX_PGSZ1_SHIFT)) | |
61 | ||
62 | /* If you want "the TLB context number" use CTX_NR_MASK. If you | |
63 | * want "the bits I program into the context registers" use | |
64 | * CTX_HW_MASK. | |
65 | */ | |
66 | #define CTX_NR_MASK TAG_CONTEXT_BITS | |
67 | #define CTX_HW_MASK (CTX_NR_MASK | CTX_PGSZ_MASK) | |
68 | ||
69 | #define CTX_FIRST_VERSION ((_AC(1,UL) << CTX_VERSION_SHIFT) + _AC(1,UL)) | |
70 | #define CTX_VALID(__ctx) \ | |
71 | (!(((__ctx.sparc64_ctx_val) ^ tlb_context_cache) & CTX_VERSION_MASK)) | |
72 | #define CTX_HWBITS(__ctx) ((__ctx.sparc64_ctx_val) & CTX_HW_MASK) | |
73 | #define CTX_NRBITS(__ctx) ((__ctx.sparc64_ctx_val) & CTX_NR_MASK) | |
74 | ||
75 | #ifndef __ASSEMBLY__ | |
76 | ||
77 | #define TSB_ENTRY_ALIGNMENT 16 | |
78 | ||
79 | struct tsb { | |
80 | unsigned long tag; | |
81 | unsigned long pte; | |
82 | } __attribute__((aligned(TSB_ENTRY_ALIGNMENT))); | |
83 | ||
84 | extern void __tsb_insert(unsigned long ent, unsigned long tag, unsigned long pte); | |
85 | extern void tsb_flush(unsigned long ent, unsigned long tag); | |
86 | extern void tsb_init(struct tsb *tsb, unsigned long size); | |
87 | ||
88 | struct tsb_config { | |
89 | struct tsb *tsb; | |
90 | unsigned long tsb_rss_limit; | |
91 | unsigned long tsb_nentries; | |
92 | unsigned long tsb_reg_val; | |
93 | unsigned long tsb_map_vaddr; | |
94 | unsigned long tsb_map_pte; | |
95 | }; | |
96 | ||
97 | #define MM_TSB_BASE 0 | |
98 | ||
99 | #ifdef CONFIG_HUGETLB_PAGE | |
100 | #define MM_TSB_HUGE 1 | |
101 | #define MM_NUM_TSBS 2 | |
102 | #else | |
103 | #define MM_NUM_TSBS 1 | |
104 | #endif | |
105 | ||
106 | typedef struct { | |
107 | spinlock_t lock; | |
108 | unsigned long sparc64_ctx_val; | |
109 | unsigned long huge_pte_count; | |
110 | struct tsb_config tsb_block[MM_NUM_TSBS]; | |
111 | struct hv_tsb_descr tsb_descr[MM_NUM_TSBS]; | |
112 | } mm_context_t; | |
113 | ||
114 | #endif /* !__ASSEMBLY__ */ | |
115 | ||
116 | #define TSB_CONFIG_TSB 0x00 | |
117 | #define TSB_CONFIG_RSS_LIMIT 0x08 | |
118 | #define TSB_CONFIG_NENTRIES 0x10 | |
119 | #define TSB_CONFIG_REG_VAL 0x18 | |
120 | #define TSB_CONFIG_MAP_VADDR 0x20 | |
121 | #define TSB_CONFIG_MAP_PTE 0x28 | |
122 | ||
123 | #endif /* __MMU_H */ |