1 | /* |
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2 | * Done by Dietmar Hahn <dietmar.hahn@fujitsu-siemens.com> |
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3 | * Common stuff for memory and page handling. |
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4 | * Parts are taken from FreeBSD. |
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5 | * |
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6 | **************************************************************************** |
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7 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
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8 | * of this software and associated documentation files (the "Software"), to |
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9 | * deal in the Software without restriction, including without limitation the |
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10 | * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or |
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11 | * sell copies of the Software, and to permit persons to whom the Software is |
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12 | * furnished to do so, subject to the following conditions: |
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13 | * |
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14 | * The above copyright notice and this permission notice shall be included in |
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15 | * all copies or substantial portions of the Software. |
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16 | * |
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17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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18 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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20 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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21 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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22 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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23 | * DEALINGS IN THE SOFTWARE. |
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24 | */ |
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25 | |
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26 | |
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27 | #if !defined(_PAGE_H_) |
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28 | #define _PAGE_H_ |
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29 | |
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30 | #include "os.h" |
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31 | #include "ia64_cpu.h" |
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32 | |
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33 | #define PTE_KERNEL_ATTR ((PTE_P<<PTE_P_SHIFT) |\ |
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34 | (PTE_MA_WB<<PTE_MA_SHIFT) |\ |
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35 | (PTE_D<<PTE_D_SHIFT) |\ |
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36 | (PTE_A<<PTE_A_SHIFT) |\ |
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37 | (PTE_PL_KERN<<PTE_PL_SHIFT) |\ |
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38 | (PTE_AR_RWX<<PTE_AR_SHIFT)) |
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39 | |
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40 | |
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41 | /* The kernel tr page size for text and data. */ |
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42 | #define KERNEL_TR_PAGE_SIZE PTE_PS_1M |
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43 | /* The efi-pal page size for text and data. */ |
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44 | #define PAL_TR_PAGE_SIZE PTE_PS_1M |
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45 | |
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46 | /* Commonly 16K pages are used. */ |
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47 | #define PAGE_SHIFT 14 /* 16K pages */ |
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48 | #define PAGE_SIZE (1<<(PAGE_SHIFT)) |
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49 | #define PAGE_MASK (~(PAGE_SIZE-1)) |
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50 | |
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51 | #define KSTACK_PAGES 4 /* 4 pages for the kernel stack + bsp */ |
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52 | |
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53 | #define IA64_TR_KERNEL 0 /* itr0, dtr0: maps kernel image (code) */ |
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54 | #define IA64_TR_PAL 1 /* itr1: maps pal code */ |
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55 | |
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56 | /* |
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57 | * Manipulating region bits of an address. |
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58 | */ |
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59 | #define IA64_RR_BASE(n) ((UL_TYPE(n)) << 61) |
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60 | #define IA64_RR_MASK(x) ((UL_TYPE(x)) & ((1L << 61) - 1)) |
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61 | #define IA64_RR_EXTR(x) ((x) >> 61) |
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62 | |
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63 | #define IA64_PHYS_TO_RR5(x) ((x) | IA64_RR_BASE(5)) |
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64 | #define IA64_PHYS_TO_RR7(x) ((x) | IA64_RR_BASE(7)) |
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65 | |
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66 | #define __pa(x) IA64_RR_MASK(x) |
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67 | #define __va(x) IA64_PHYS_TO_RR7(x) |
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68 | |
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69 | #define roundup_page(x) ((((unsigned long)(x)) + PAGE_SIZE -1) & PAGE_MASK) |
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70 | #define trunc_page(x) ((unsigned long)(x) & PAGE_MASK) |
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71 | |
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72 | |
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73 | #if !defined(__ASSEMBLY__) |
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74 | |
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75 | /* Contains the parts of the physically memory. */ |
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76 | extern paddr_t phys_avail[]; |
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77 | |
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78 | #define page_to_pfn(page) ((uint64_t)(page) >> PAGE_SHIFT) |
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79 | #define pfn_to_page(pfn) ((uint64_t)pfn << PAGE_SHIFT) |
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80 | /* Get phyiscal address of page of virtual address. */ |
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81 | #define virt_to_page(addr) ((uint64_t)__pa(addr) & PAGE_MASK) |
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82 | #define virt_to_pfn(addr) (page_to_pfn(virt_to_page(addr))) |
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83 | |
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84 | |
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85 | #endif /* __ASSEMBLY__ */ |
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86 | |
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87 | |
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88 | /* For both see minios-ia64.lds. */ |
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89 | /* This is where the kernel virtually starts. */ |
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90 | #define KERNEL_START IA64_PHYS_TO_RR5(0x100000000) |
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91 | /* !!!!! |
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92 | * For physical start of kernel |
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93 | * Currently used in arch/ia64/fw.S. |
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94 | * !!!!! |
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95 | */ |
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96 | #define KERNEL_PHYS_START_SHIFT 20 |
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97 | |
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98 | /* A region 5 address to physical address */ |
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99 | #define KERN_VIRT_2_PHYS(x) (((x) - KERNEL_START) + \ |
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100 | (1 << KERNEL_PHYS_START_SHIFT)) |
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101 | |
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102 | // This is xen specific ! |
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103 | #define PAGE_SHIFT_XEN_16K 14 // For 16KB page size |
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104 | #define mfn_to_virt(mfn) ((void*)__va((mfn) << PAGE_SHIFT_XEN_16K)) |
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105 | |
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106 | #endif /* !defined(_PAGE_H_) */ |
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