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This commit is contained in:
Nguyen Anh Quynh
2015-08-21 15:04:50 +08:00
commit 344d016104
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187
qemu/include/exec/ram_addr.h Normal file
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/*
* Declarations for cpu physical memory functions
*
* Copyright 2011 Red Hat, Inc. and/or its affiliates
*
* Authors:
* Avi Kivity <avi@redhat.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or
* later. See the COPYING file in the top-level directory.
*
*/
/*
* This header is for use by exec.c and memory.c ONLY. Do not include it.
* The functions declared here will be removed soon.
*/
#ifndef RAM_ADDR_H
#define RAM_ADDR_H
#include "uc_priv.h"
#ifndef CONFIG_USER_ONLY
ram_addr_t qemu_ram_alloc_from_ptr(ram_addr_t size, void *host,
MemoryRegion *mr, Error **errp);
ram_addr_t qemu_ram_alloc(ram_addr_t size, MemoryRegion *mr, Error **errp);
int qemu_get_ram_fd(struct uc_struct *uc, ram_addr_t addr);
void *qemu_get_ram_block_host_ptr(struct uc_struct *uc, ram_addr_t addr);
void *qemu_get_ram_ptr(struct uc_struct *uc, ram_addr_t addr);
void qemu_ram_free(struct uc_struct *c, ram_addr_t addr);
void qemu_ram_free_from_ptr(struct uc_struct *uc, ram_addr_t addr);
static inline bool cpu_physical_memory_get_dirty(struct uc_struct *uc, ram_addr_t start,
ram_addr_t length,
unsigned client)
{
unsigned long end, page, next;
assert(client < DIRTY_MEMORY_NUM);
end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
page = start >> TARGET_PAGE_BITS;
next = find_next_bit(uc->ram_list.dirty_memory[client], end, page);
return next < end;
}
static inline bool cpu_physical_memory_get_clean(struct uc_struct *uc, ram_addr_t start,
ram_addr_t length,
unsigned client)
{
unsigned long end, page, next;
assert(client < DIRTY_MEMORY_NUM);
end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
page = start >> TARGET_PAGE_BITS;
next = find_next_zero_bit(uc->ram_list.dirty_memory[client], end, page);
return next < end;
}
static inline bool cpu_physical_memory_get_dirty_flag(struct uc_struct *uc, ram_addr_t addr,
unsigned client)
{
return cpu_physical_memory_get_dirty(uc, addr, 1, client);
}
static inline bool cpu_physical_memory_is_clean(struct uc_struct *uc, ram_addr_t addr)
{
bool vga = cpu_physical_memory_get_dirty_flag(uc, addr, DIRTY_MEMORY_VGA);
bool code = cpu_physical_memory_get_dirty_flag(uc, addr, DIRTY_MEMORY_CODE);
bool migration =
cpu_physical_memory_get_dirty_flag(uc, addr, DIRTY_MEMORY_MIGRATION);
return !(vga && code && migration);
}
static inline bool cpu_physical_memory_range_includes_clean(struct uc_struct *uc, ram_addr_t start,
ram_addr_t length)
{
bool vga = cpu_physical_memory_get_clean(uc, start, length, DIRTY_MEMORY_VGA);
bool code = cpu_physical_memory_get_clean(uc, start, length, DIRTY_MEMORY_CODE);
bool migration =
cpu_physical_memory_get_clean(uc, start, length, DIRTY_MEMORY_MIGRATION);
return vga || code || migration;
}
static inline void cpu_physical_memory_set_dirty_flag(struct uc_struct *uc, ram_addr_t addr,
unsigned client)
{
assert(client < DIRTY_MEMORY_NUM);
set_bit(addr >> TARGET_PAGE_BITS, uc->ram_list.dirty_memory[client]);
}
static inline void cpu_physical_memory_set_dirty_range_nocode(struct uc_struct *uc, ram_addr_t start,
ram_addr_t length)
{
unsigned long end, page;
end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
page = start >> TARGET_PAGE_BITS;
bitmap_set(uc->ram_list.dirty_memory[DIRTY_MEMORY_MIGRATION], page, end - page);
bitmap_set(uc->ram_list.dirty_memory[DIRTY_MEMORY_VGA], page, end - page);
}
static inline void cpu_physical_memory_set_dirty_range(struct uc_struct *uc, ram_addr_t start,
ram_addr_t length)
{
unsigned long end, page;
end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
page = start >> TARGET_PAGE_BITS;
bitmap_set(uc->ram_list.dirty_memory[DIRTY_MEMORY_MIGRATION], page, end - page);
bitmap_set(uc->ram_list.dirty_memory[DIRTY_MEMORY_VGA], page, end - page);
bitmap_set(uc->ram_list.dirty_memory[DIRTY_MEMORY_CODE], page, end - page);
}
#if !defined(_WIN32)
static inline void cpu_physical_memory_set_dirty_lebitmap(struct uc_struct *uc, unsigned long *bitmap,
ram_addr_t start,
ram_addr_t pages)
{
unsigned long i, j;
unsigned long page_number, c;
hwaddr addr;
ram_addr_t ram_addr;
unsigned long len = (pages + HOST_LONG_BITS - 1) / HOST_LONG_BITS;
unsigned long hpratio = getpagesize() / TARGET_PAGE_SIZE;
unsigned long page = BIT_WORD(start >> TARGET_PAGE_BITS);
/* start address is aligned at the start of a word? */
if ((((page * BITS_PER_LONG) << TARGET_PAGE_BITS) == start) &&
(hpratio == 1)) {
long k;
long nr = BITS_TO_LONGS(pages);
for (k = 0; k < nr; k++) {
if (bitmap[k]) {
unsigned long temp = leul_to_cpu(bitmap[k]);
uc->ram_list.dirty_memory[DIRTY_MEMORY_MIGRATION][page + k] |= temp;
uc->ram_list.dirty_memory[DIRTY_MEMORY_VGA][page + k] |= temp;
uc->ram_list.dirty_memory[DIRTY_MEMORY_CODE][page + k] |= temp;
}
}
} else {
/*
* bitmap-traveling is faster than memory-traveling (for addr...)
* especially when most of the memory is not dirty.
*/
for (i = 0; i < len; i++) {
if (bitmap[i] != 0) {
c = leul_to_cpu(bitmap[i]);
do {
j = ctzl(c);
c &= ~(1ul << j);
page_number = (i * HOST_LONG_BITS + j) * hpratio;
addr = page_number * TARGET_PAGE_SIZE;
ram_addr = start + addr;
cpu_physical_memory_set_dirty_range(uc, ram_addr,
TARGET_PAGE_SIZE * hpratio);
} while (c != 0);
}
}
}
}
#endif /* not _WIN32 */
static inline void cpu_physical_memory_clear_dirty_range(struct uc_struct *uc, ram_addr_t start,
ram_addr_t length,
unsigned client)
{
unsigned long end, page;
assert(client < DIRTY_MEMORY_NUM);
end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
page = start >> TARGET_PAGE_BITS;
bitmap_clear(uc->ram_list.dirty_memory[client], page, end - page);
}
void cpu_physical_memory_reset_dirty(struct uc_struct *uc,
ram_addr_t start, ram_addr_t length, unsigned client);
#endif
#endif