| @@ -1,14 +1,14 @@ | | | @@ -1,14 +1,14 @@ |
| 1 | /* $NetBSD: pte.h,v 1.4 2020/03/14 16:12:16 skrll Exp $ */ | | 1 | /* $NetBSD: pte.h,v 1.5 2020/11/01 19:47:46 skrll Exp $ */ |
| 2 | | | 2 | |
| 3 | /* | | 3 | /* |
| 4 | * Copyright (c) 2014, 2019 The NetBSD Foundation, Inc. | | 4 | * Copyright (c) 2014, 2019 The NetBSD Foundation, Inc. |
| 5 | * All rights reserved. | | 5 | * All rights reserved. |
| 6 | * | | 6 | * |
| 7 | * This code is derived from software contributed to The NetBSD Foundation | | 7 | * This code is derived from software contributed to The NetBSD Foundation |
| 8 | * by Matt Thomas (of 3am Software Foundry) and Maxime Villard. | | 8 | * by Matt Thomas (of 3am Software Foundry) and Maxime Villard. |
| 9 | * | | 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or without | | 10 | * Redistribution and use in source and binary forms, with or without |
| 11 | * modification, are permitted provided that the following conditions | | 11 | * modification, are permitted provided that the following conditions |
| 12 | * are met: | | 12 | * are met: |
| 13 | * 1. Redistributions of source code must retain the above copyright | | 13 | * 1. Redistributions of source code must retain the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer. | | 14 | * notice, this list of conditions and the following disclaimer. |
| @@ -49,34 +49,35 @@ typedef __uint32_t pd_entry_t; | | | @@ -49,34 +49,35 @@ typedef __uint32_t pd_entry_t; |
| 49 | #define atomic_cas_pte atomic_cas_32 | | 49 | #define atomic_cas_pte atomic_cas_32 |
| 50 | #endif | | 50 | #endif |
| 51 | | | 51 | |
| 52 | #define PTE_PPN_SHIFT 10 | | 52 | #define PTE_PPN_SHIFT 10 |
| 53 | | | 53 | |
| 54 | #define NPTEPG (PAGE_SIZE / sizeof(pt_entry_t)) | | 54 | #define NPTEPG (PAGE_SIZE / sizeof(pt_entry_t)) |
| 55 | #define NSEGPG NPTEPG | | 55 | #define NSEGPG NPTEPG |
| 56 | #define NPDEPG NPTEPG | | 56 | #define NPDEPG NPTEPG |
| 57 | | | 57 | |
| 58 | /* Software PTE bits. */ | | 58 | /* Software PTE bits. */ |
| 59 | #define PTE_WIRED __BIT(8) | | 59 | #define PTE_WIRED __BIT(8) |
| 60 | | | 60 | |
| 61 | /* Hardware PTE bits. */ | | 61 | /* Hardware PTE bits. */ |
| 62 | #define PTE_D __BIT(7) | | 62 | // These are hardware defined bits |
| 63 | #define PTE_A __BIT(6) | | 63 | #define PTE_D __BIT(7) // Dirty |
| 64 | #define PTE_G __BIT(5) | | 64 | #define PTE_A __BIT(6) // Accessed |
| 65 | #define PTE_U __BIT(4) | | 65 | #define PTE_G __BIT(5) // Global |
| 66 | #define PTE_X __BIT(3) | | 66 | #define PTE_U __BIT(4) // User |
| 67 | #define PTE_W __BIT(2) | | 67 | #define PTE_X __BIT(3) // eXecute |
| 68 | #define PTE_R __BIT(1) | | 68 | #define PTE_W __BIT(2) // Write |
| 69 | #define PTE_V __BIT(0) | | 69 | #define PTE_R __BIT(1) // Read |
| | | 70 | #define PTE_V __BIT(0) // Valid |
| 70 | | | 71 | |
| 71 | #define PA_TO_PTE(pa) (((pa) >> PAGE_SHIFT) << PTE_PPN_SHIFT) | | 72 | #define PA_TO_PTE(pa) (((pa) >> PAGE_SHIFT) << PTE_PPN_SHIFT) |
| 72 | #define PTE_TO_PA(pte) (((pte) >> PTE_PPN_SHIFT) << PAGE_SHIFT) | | 73 | #define PTE_TO_PA(pte) (((pte) >> PTE_PPN_SHIFT) << PAGE_SHIFT) |
| 73 | | | 74 | |
| 74 | #define L2_SHIFT 30 | | 75 | #define L2_SHIFT 30 |
| 75 | #define L1_SHIFT 21 | | 76 | #define L1_SHIFT 21 |
| 76 | #define L0_SHIFT 12 | | 77 | #define L0_SHIFT 12 |
| 77 | | | 78 | |
| 78 | #define L2_SIZE (1 << L2_SHIFT) | | 79 | #define L2_SIZE (1 << L2_SHIFT) |
| 79 | #define L1_SIZE (1 << L1_SHIFT) | | 80 | #define L1_SIZE (1 << L1_SHIFT) |
| 80 | #define L0_SIZE (1 << L0_SHIFT) | | 81 | #define L0_SIZE (1 << L0_SHIFT) |
| 81 | | | 82 | |
| 82 | #define L2_OFFSET (L2_SIZE - 1) | | 83 | #define L2_OFFSET (L2_SIZE - 1) |