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5cd16ee9 ME |
1 | #ifndef _ASM_POWERPC_PAGE_64_H |
2 | #define _ASM_POWERPC_PAGE_64_H | |
3 | ||
4 | /* | |
5 | * Copyright (C) 2001 PPC64 Team, IBM Corp | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU General Public License | |
9 | * as published by the Free Software Foundation; either version | |
10 | * 2 of the License, or (at your option) any later version. | |
11 | */ | |
12 | ||
ec0c464c CL |
13 | #include <asm/asm-const.h> |
14 | ||
5cd16ee9 ME |
15 | /* |
16 | * We always define HW_PAGE_SHIFT to 12 as use of 64K pages remains Linux | |
17 | * specific, every notion of page number shared with the firmware, TCEs, | |
18 | * iommu, etc... still uses a page size of 4K. | |
19 | */ | |
20 | #define HW_PAGE_SHIFT 12 | |
21 | #define HW_PAGE_SIZE (ASM_CONST(1) << HW_PAGE_SHIFT) | |
22 | #define HW_PAGE_MASK (~(HW_PAGE_SIZE-1)) | |
23 | ||
24 | /* | |
25 | * PAGE_FACTOR is the number of bits factor between PAGE_SHIFT and | |
26 | * HW_PAGE_SHIFT, that is 4K pages. | |
27 | */ | |
28 | #define PAGE_FACTOR (PAGE_SHIFT - HW_PAGE_SHIFT) | |
29 | ||
1189be65 | 30 | /* Segment size; normal 256M segments */ |
5cd16ee9 | 31 | #define SID_SHIFT 28 |
16a15a30 | 32 | #define SID_MASK ASM_CONST(0xfffffffff) |
5cd16ee9 ME |
33 | #define ESID_MASK 0xfffffffff0000000UL |
34 | #define GET_ESID(x) (((x) >> SID_SHIFT) & SID_MASK) | |
35 | ||
1189be65 PM |
36 | /* 1T segments */ |
37 | #define SID_SHIFT_1T 40 | |
38 | #define SID_MASK_1T 0xffffffUL | |
39 | #define ESID_MASK_1T 0xffffff0000000000UL | |
40 | #define GET_ESID_1T(x) (((x) >> SID_SHIFT_1T) & SID_MASK_1T) | |
41 | ||
5cd16ee9 ME |
42 | #ifndef __ASSEMBLY__ |
43 | #include <asm/cache.h> | |
44 | ||
45 | typedef unsigned long pte_basic_t; | |
46 | ||
e35735b9 | 47 | static inline void clear_page(void *addr) |
5cd16ee9 | 48 | { |
e35735b9 AB |
49 | unsigned long iterations; |
50 | unsigned long onex, twox, fourx, eightx; | |
51 | ||
e2827fe5 | 52 | iterations = ppc64_caches.l1d.blocks_per_page / 8; |
e35735b9 AB |
53 | |
54 | /* | |
55 | * Some verisions of gcc use multiply instructions to | |
56 | * calculate the offsets so lets give it a hand to | |
57 | * do better. | |
58 | */ | |
e2827fe5 | 59 | onex = ppc64_caches.l1d.block_size; |
e35735b9 AB |
60 | twox = onex << 1; |
61 | fourx = onex << 2; | |
62 | eightx = onex << 3; | |
63 | ||
64 | asm volatile( | |
5cd16ee9 | 65 | "mtctr %1 # clear_page\n\ |
e35735b9 AB |
66 | .balign 16\n\ |
67 | 1: dcbz 0,%0\n\ | |
68 | dcbz %3,%0\n\ | |
69 | dcbz %4,%0\n\ | |
70 | dcbz %5,%0\n\ | |
71 | dcbz %6,%0\n\ | |
72 | dcbz %7,%0\n\ | |
73 | dcbz %8,%0\n\ | |
74 | dcbz %9,%0\n\ | |
75 | add %0,%0,%10\n\ | |
5cd16ee9 | 76 | bdnz+ 1b" |
e35735b9 AB |
77 | : "=&r" (addr) |
78 | : "r" (iterations), "0" (addr), "b" (onex), "b" (twox), | |
79 | "b" (twox+onex), "b" (fourx), "b" (fourx+onex), | |
80 | "b" (twox+fourx), "b" (eightx-onex), "r" (eightx) | |
5cd16ee9 ME |
81 | : "ctr", "memory"); |
82 | } | |
83 | ||
d988f0e3 | 84 | extern void copy_page(void *to, void *from); |
5cd16ee9 ME |
85 | |
86 | /* Log 2 of page table size */ | |
87 | extern u64 ppc64_pft_size; | |
88 | ||
5cd16ee9 ME |
89 | #endif /* __ASSEMBLY__ */ |
90 | ||
5cd16ee9 | 91 | #define VM_DATA_DEFAULT_FLAGS \ |
cab175f9 | 92 | (is_32bit_task() ? \ |
5cd16ee9 ME |
93 | VM_DATA_DEFAULT_FLAGS32 : VM_DATA_DEFAULT_FLAGS64) |
94 | ||
95 | /* | |
96 | * This is the default if a program doesn't have a PT_GNU_STACK | |
97 | * program header entry. The PPC64 ELF ABI has a non executable stack | |
25985edc | 98 | * stack by default, so in the absence of a PT_GNU_STACK program header |
5cd16ee9 ME |
99 | * we turn execute permission off. |
100 | */ | |
101 | #define VM_STACK_DEFAULT_FLAGS32 (VM_READ | VM_WRITE | VM_EXEC | \ | |
102 | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) | |
103 | ||
104 | #define VM_STACK_DEFAULT_FLAGS64 (VM_READ | VM_WRITE | \ | |
105 | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) | |
106 | ||
107 | #define VM_STACK_DEFAULT_FLAGS \ | |
cab175f9 | 108 | (is_32bit_task() ? \ |
5cd16ee9 ME |
109 | VM_STACK_DEFAULT_FLAGS32 : VM_STACK_DEFAULT_FLAGS64) |
110 | ||
5b17e1cd | 111 | #include <asm-generic/getorder.h> |
5cd16ee9 ME |
112 | |
113 | #endif /* _ASM_POWERPC_PAGE_64_H */ |