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/*
* QEMU page protection declarations.
*
* Copyright (c) 2003 Fabrice Bellard
*
* SPDX-License-Identifier: LGPL-2.1+
*/
#ifndef USER_PAGE_PROTECTION_H
#define USER_PAGE_PROTECTION_H
#ifndef CONFIG_USER_ONLY
#error Cannot include this header from system emulation
#endif
#include "cpu-param.h"
#include "exec/target_long.h"
#include "exec/translation-block.h"
void page_protect(tb_page_addr_t page_addr);
int page_unprotect(tb_page_addr_t address, uintptr_t pc);
/**
* page_set_flags:
* @start: first byte of range
* @last: last byte of range
* @flags: flags to set
* Context: holding mmap lock
*
* Modify the flags of a page and invalidate the code if necessary.
* The flag PAGE_WRITE_ORG is positioned automatically depending
* on PAGE_WRITE. The mmap_lock should already be held.
*/
void page_set_flags(target_ulong start, target_ulong last, int flags);
void page_reset_target_data(target_ulong start, target_ulong last);
/**
* page_check_range_empty:
* @start: first byte of range
* @last: last byte of range
* Context: holding mmap lock
*
* Return true if the entire range [@start, @last] is unmapped.
* The memory lock must be held so that the caller will can ensure
* the result stays true until a new mapping can be installed.
*/
bool page_check_range_empty(target_ulong start, target_ulong last);
/**
* page_find_range_empty
* @min: first byte of search range
* @max: last byte of search range
* @len: size of the hole required
* @align: alignment of the hole required (power of 2)
*
* If there is a range [x, x+@len) within [@min, @max] such that
* x % @align == 0, then return x. Otherwise return -1.
* The memory lock must be held, as the caller will want to ensure
* the returned range stays empty until a new mapping can be installed.
*/
target_ulong page_find_range_empty(target_ulong min, target_ulong max,
target_ulong len, target_ulong align);
/**
* page_get_target_data(address)
* @address: guest virtual address
*
* Return TARGET_PAGE_DATA_SIZE bytes of out-of-band data to associate
* with the guest page at @address, allocating it if necessary. The
* caller should already have verified that the address is valid.
*
* The memory will be freed when the guest page is deallocated,
* e.g. with the munmap system call.
*/
__attribute__((returns_nonnull))
void *page_get_target_data(target_ulong address);
typedef int (*walk_memory_regions_fn)(void *, target_ulong,
target_ulong, unsigned long);
int walk_memory_regions(void *, walk_memory_regions_fn);
void page_dump(FILE *f);
#endif
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