1 /* 2 * Declarations for cpu physical memory functions 3 * 4 * Copyright 2011 Red Hat, Inc. and/or its affiliates 5 * 6 * Authors: 7 * Avi Kivity <avi@redhat.com> 8 * 9 * This work is licensed under the terms of the GNU GPL, version 2 or 10 * later. See the COPYING file in the top-level directory. 11 * 12 */ 13 14 /* 15 * This header is for use by exec.c and memory.c ONLY. Do not include it. 16 * The functions declared here will be removed soon. 17 */ 18 19 #ifndef RAM_ADDR_H 20 #define RAM_ADDR_H 21 22 #ifndef CONFIG_USER_ONLY 23 #include "hw/xen/xen.h" 24 25 ram_addr_t qemu_ram_alloc_from_ptr(ram_addr_t size, void *host, 26 MemoryRegion *mr); 27 ram_addr_t qemu_ram_alloc(ram_addr_t size, MemoryRegion *mr); 28 void *qemu_get_ram_ptr(ram_addr_t addr); 29 void qemu_ram_free(ram_addr_t addr); 30 void qemu_ram_free_from_ptr(ram_addr_t addr); 31 32 static inline bool cpu_physical_memory_get_dirty(ram_addr_t start, 33 ram_addr_t length, 34 unsigned client) 35 { 36 unsigned long end, page, next; 37 38 assert(client < DIRTY_MEMORY_NUM); 39 40 end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS; 41 page = start >> TARGET_PAGE_BITS; 42 next = find_next_bit(ram_list.dirty_memory[client], end, page); 43 44 return next < end; 45 } 46 47 static inline bool cpu_physical_memory_get_dirty_flag(ram_addr_t addr, 48 unsigned client) 49 { 50 return cpu_physical_memory_get_dirty(addr, 1, client); 51 } 52 53 static inline bool cpu_physical_memory_is_clean(ram_addr_t addr) 54 { 55 bool vga = cpu_physical_memory_get_dirty_flag(addr, DIRTY_MEMORY_VGA); 56 bool code = cpu_physical_memory_get_dirty_flag(addr, DIRTY_MEMORY_CODE); 57 bool migration = 58 cpu_physical_memory_get_dirty_flag(addr, DIRTY_MEMORY_MIGRATION); 59 return !(vga && code && migration); 60 } 61 62 static inline void cpu_physical_memory_set_dirty_flag(ram_addr_t addr, 63 unsigned client) 64 { 65 assert(client < DIRTY_MEMORY_NUM); 66 set_bit(addr >> TARGET_PAGE_BITS, ram_list.dirty_memory[client]); 67 } 68 69 static inline void cpu_physical_memory_set_dirty_range(ram_addr_t start, 70 ram_addr_t length) 71 { 72 unsigned long end, page; 73 74 end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS; 75 page = start >> TARGET_PAGE_BITS; 76 bitmap_set(ram_list.dirty_memory[DIRTY_MEMORY_MIGRATION], page, end - page); 77 bitmap_set(ram_list.dirty_memory[DIRTY_MEMORY_VGA], page, end - page); 78 bitmap_set(ram_list.dirty_memory[DIRTY_MEMORY_CODE], page, end - page); 79 xen_modified_memory(start, length); 80 } 81 82 #if !defined(_WIN32) 83 static inline void cpu_physical_memory_set_dirty_lebitmap(unsigned long *bitmap, 84 ram_addr_t start, 85 ram_addr_t pages) 86 { 87 unsigned long i, j; 88 unsigned long page_number, c; 89 hwaddr addr; 90 ram_addr_t ram_addr; 91 unsigned long len = (pages + HOST_LONG_BITS - 1) / HOST_LONG_BITS; 92 unsigned long hpratio = getpagesize() / TARGET_PAGE_SIZE; 93 unsigned long page = BIT_WORD(start >> TARGET_PAGE_BITS); 94 95 /* start address is aligned at the start of a word? */ 96 if ((((page * BITS_PER_LONG) << TARGET_PAGE_BITS) == start) && 97 (hpratio == 1)) { 98 long k; 99 long nr = BITS_TO_LONGS(pages); 100 101 for (k = 0; k < nr; k++) { 102 if (bitmap[k]) { 103 unsigned long temp = leul_to_cpu(bitmap[k]); 104 105 ram_list.dirty_memory[DIRTY_MEMORY_MIGRATION][page + k] |= temp; 106 ram_list.dirty_memory[DIRTY_MEMORY_VGA][page + k] |= temp; 107 ram_list.dirty_memory[DIRTY_MEMORY_CODE][page + k] |= temp; 108 } 109 } 110 xen_modified_memory(start, pages); 111 } else { 112 /* 113 * bitmap-traveling is faster than memory-traveling (for addr...) 114 * especially when most of the memory is not dirty. 115 */ 116 for (i = 0; i < len; i++) { 117 if (bitmap[i] != 0) { 118 c = leul_to_cpu(bitmap[i]); 119 do { 120 j = ffsl(c) - 1; 121 c &= ~(1ul << j); 122 page_number = (i * HOST_LONG_BITS + j) * hpratio; 123 addr = page_number * TARGET_PAGE_SIZE; 124 ram_addr = start + addr; 125 cpu_physical_memory_set_dirty_range(ram_addr, 126 TARGET_PAGE_SIZE * hpratio); 127 } while (c != 0); 128 } 129 } 130 } 131 } 132 #endif /* not _WIN32 */ 133 134 static inline void cpu_physical_memory_clear_dirty_range(ram_addr_t start, 135 ram_addr_t length, 136 unsigned client) 137 { 138 unsigned long end, page; 139 140 assert(client < DIRTY_MEMORY_NUM); 141 end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS; 142 page = start >> TARGET_PAGE_BITS; 143 bitmap_clear(ram_list.dirty_memory[client], page, end - page); 144 } 145 146 void cpu_physical_memory_reset_dirty(ram_addr_t start, ram_addr_t length, 147 unsigned client); 148 149 #endif 150 #endif 151