| 1 | /* |
| 2 | * Target page sizes and friends for non target files |
| 3 | * |
| 4 | * Copyright (c) 2017 Red Hat Inc |
| 5 | * |
| 6 | * Authors: |
| 7 | * David Alan Gilbert <dgilbert@redhat.com> |
| 8 | * Juan Quintela <quintela@redhat.com> |
| 9 | * |
| 10 | * This work is licensed under the terms of the GNU GPL, version 2 or later. |
| 11 | * See the COPYING file in the top-level directory. |
| 12 | */ |
| 13 | |
| 14 | #ifndef EXEC_TARGET_PAGE_H |
| 15 | #define EXEC_TARGET_PAGE_H |
| 16 | |
| 17 | /* |
| 18 | * If compiling per-target, get the real values. |
| 19 | * For generic code, reuse the mechanism for variable page size. |
| 20 | */ |
| 21 | #ifdef COMPILING_PER_TARGET |
| 22 | #include "cpu-param.h" |
| 23 | #include "exec/target_long.h" |
| 24 | #define TARGET_PAGE_TYPE target_long |
| 25 | #else |
| 26 | #define TARGET_PAGE_BITS_VARY |
| 27 | #define TARGET_PAGE_TYPE int |
| 28 | #endif |
| 29 | |
| 30 | #ifdef TARGET_PAGE_BITS_VARY |
| 31 | # include "exec/page-vary.h" |
| 32 | extern const TargetPageBits target_page; |
| 33 | # ifdef CONFIG_DEBUG_TCG |
| 34 | # define TARGET_PAGE_BITS ({ assert(target_page.decided); \ |
| 35 | target_page.bits; }) |
| 36 | # define TARGET_PAGE_MASK ({ assert(target_page.decided); \ |
| 37 | (TARGET_PAGE_TYPE)target_page.mask; }) |
| 38 | # else |
| 39 | # define TARGET_PAGE_BITS target_page.bits |
| 40 | # define TARGET_PAGE_MASK ((TARGET_PAGE_TYPE)target_page.mask) |
| 41 | # endif |
| 42 | # define TARGET_PAGE_SIZE (-(int)TARGET_PAGE_MASK) |
| 43 | #else |
| 44 | # define TARGET_PAGE_SIZE (1 << TARGET_PAGE_BITS) |
| 45 | # define TARGET_PAGE_MASK ((TARGET_PAGE_TYPE)-1 << TARGET_PAGE_BITS) |
| 46 | #endif |
| 47 | |
| 48 | #define TARGET_PAGE_ALIGN(addr) ROUND_UP((addr), TARGET_PAGE_SIZE) |
| 49 | |
| 50 | static inline size_t qemu_target_page_size(void) |
| 51 | { |
| 52 | return TARGET_PAGE_SIZE; |
| 53 | } |
| 54 | |
| 55 | static inline int qemu_target_page_mask(void) |
| 56 | { |
| 57 | return TARGET_PAGE_MASK; |
| 58 | } |
| 59 | |
| 60 | static inline int qemu_target_page_bits(void) |
| 61 | { |
| 62 | return TARGET_PAGE_BITS; |
| 63 | } |
| 64 | |
| 65 | /* Convert target pages to MiB (2**20). */ |
| 66 | static inline size_t qemu_target_pages_to_MiB(size_t pages) |
| 67 | { |
| 68 | int page_bits = TARGET_PAGE_BITS; |
| 69 | |
| 70 | /* So far, the largest (non-huge) page size is 64k, i.e. 16 bits. */ |
| 71 | g_assert(page_bits < 20); |
| 72 | |
| 73 | return pages >> (20 - page_bits); |
| 74 | } |
| 75 | |
| 76 | #endif |