blob: bd78e5f03fce2fe3f1c35cd32dbc3d3bb840500d (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
/*
* Semihosting Console
*
* Copyright (c) 2019 Linaro Ltd
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#ifndef SEMIHOST_CONSOLE_H
#define SEMIHOST_CONSOLE_H
#include "cpu.h"
/**
* qemu_semihosting_console_read:
* @cs: CPUState
* @buf: host buffer
* @len: buffer size
*
* Receive at least one character from debug console. As this call may
* block if no data is available we suspend the CPU and will re-execute the
* instruction when data is there. Therefore two conditions must be met:
*
* - CPUState is synchronized before calling this function
* - pc is only updated once the character is successfully returned
*
* Returns: number of characters read, OR cpu_loop_exit!
*/
int qemu_semihosting_console_read(CPUState *cs, void *buf, int len);
/**
* qemu_semihosting_console_write:
* @buf: host buffer
* @len: buffer size
*
* Write len bytes from buf to the debug console.
*
* Returns: number of bytes written -- this should only ever be short
* on some sort of i/o error.
*/
int qemu_semihosting_console_write(void *buf, int len);
/*
* qemu_semihosting_console_block_until_ready:
* @cs: CPUState
*
* If no data is available we suspend the CPU and will re-execute the
* instruction when data is available.
*/
void qemu_semihosting_console_block_until_ready(CPUState *cs);
/**
* qemu_semihosting_console_ready:
*
* Return true if characters are available for read; does not block.
*/
bool qemu_semihosting_console_ready(void);
#endif /* SEMIHOST_CONSOLE_H */
|
