kopia lustrzana https://github.com/espressif/esp-idf
151 wiersze
4.2 KiB
C
151 wiersze
4.2 KiB
C
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/*
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* SPDX-FileCopyrightText: 2022 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#pragma once
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#include <string.h>
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#include <sys/errno.h>
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#ifdef __XTENSA__
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#include "xtensa/semihosting.h"
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#elif __riscv
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#include "riscv/semihosting.h"
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#else
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#error Unsupported architecture
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* Semihosting call numbers and functions for OpenOCD.
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* In OpenOCD, ARM semihosting call numbers and parameters are used for
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* RISC-V and Xtensa targets.
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*
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* These conventions are not compatible with Xtensa ISS and QEMU for Xtensa,
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* which the actual Xtensa-specific semihosting call numbers and formats;
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* these are not supported in ESP-IDF yet.
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*/
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#define SEMIHOSTING_SYS_CLOCK 0x10
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#define SEMIHOSTING_SYS_CLOSE 0x02
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#define SEMIHOSTING_SYS_ERRNO 0x13
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#define SEMIHOSTING_SYS_EXIT 0x18
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#define SEMIHOSTING_SYS_EXIT_EXTENDED 0x20
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#define SEMIHOSTING_SYS_FLEN 0x0C
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#define SEMIHOSTING_SYS_GET_CMDLINE 0x15
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#define SEMIHOSTING_SYS_HEAPINFO 0x16
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#define SEMIHOSTING_SYS_ISERROR 0x08
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#define SEMIHOSTING_SYS_ISTTY 0x09
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#define SEMIHOSTING_SYS_OPEN 0x01
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#define SEMIHOSTING_SYS_READ 0x06
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#define SEMIHOSTING_SYS_READC 0x07
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#define SEMIHOSTING_SYS_REMOVE 0x0E
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#define SEMIHOSTING_SYS_RENAME 0x0F
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#define SEMIHOSTING_SYS_SEEK 0x0A
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#define SEMIHOSTING_SYS_SYSTEM 0x12
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#define SEMIHOSTING_SYS_TIME 0x11
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#define SEMIHOSTING_SYS_WRITE 0x05
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#define SEMIHOSTING_SYS_WRITEC 0x03
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#define SEMIHOSTING_SYS_WRITE0 0x04
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/* This call is an Espressif OpenOCD extension to send the version
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* information to the host. This lets the host support different IDF versions,
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* allowing semihosting interface to be modified over time.
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*
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* The parameters of this call are:
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* - pointer to the version info structure,
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* - size of the version info structure.
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*
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* At present, the structure should contain a single word, indicating
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* the semihosting interface version used by the target.
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*
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* If the syscall is recognized, the return value is zero.
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*/
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#define SEMIHOSTING_SYS_DRVINFO 0xE0
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static inline int semihosting_open(const char *path, int open_mode, int mode)
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{
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int host_errno = 0;
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long args[] = {(long) path, open_mode, strlen(path), 0};
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(void) mode; // unused in OpenOCD
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int result = (int) semihosting_call(SEMIHOSTING_SYS_OPEN, args, &host_errno);
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if (result < 0) {
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errno = host_errno;
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}
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return result;
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}
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static inline ssize_t semihosting_write(int fd, const void *data, size_t size)
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{
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int host_errno = 0;
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long args[] = {fd, (long) data, size, 0};
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ssize_t ret = (ssize_t) semihosting_call(SEMIHOSTING_SYS_WRITE, args, &host_errno);
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if (ret < 0) {
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errno = host_errno;
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return ret;
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}
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/* On success, write syscall returns the number of bytes NOT written,
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* adjust the return value to match POSIX.
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*/
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return size - (ssize_t)ret;
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}
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static inline ssize_t semihosting_read(int fd, void *data, size_t size)
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{
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int host_errno = 0;
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long args[] = {fd, (long) data, size, 0};
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ssize_t ret = (ssize_t) semihosting_call(SEMIHOSTING_SYS_READ, args, &host_errno);
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if (ret < 0) {
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errno = host_errno;
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return ret;
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}
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/* On success, read syscall returns the number of bytes NOT read,
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* adjust the return value to match POSIX.
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*/
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return size - (ssize_t)ret;
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}
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static inline int semihosting_close(int fd)
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{
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int host_errno = 0;
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long args[] = {fd, 0, 0, 0};
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int ret = (int) semihosting_call(SEMIHOSTING_SYS_CLOSE, args, &host_errno);
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if (ret < 0) {
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errno = host_errno;
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}
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return ret;
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}
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static inline off_t semihosting_seek(int fd, off_t offset, int mode)
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{
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int host_errno = 0;
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long args[] = {fd, offset, mode, 0};
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off_t ret = (off_t) semihosting_call(SEMIHOSTING_SYS_SEEK, args, &host_errno);
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if (ret == -1) {
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errno = host_errno;
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}
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return ret;
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}
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static inline int semihosting_ver_info(void)
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{
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int host_errno = 0;
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struct {
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int version;
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} ver_info = { 1 };
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long args[] = {(long) &ver_info, sizeof(ver_info), 0, 0};
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int ret = (int) semihosting_call(SEMIHOSTING_SYS_DRVINFO, args, &host_errno);
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(void) host_errno; /* errno not set by this call */
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return ret;
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}
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#ifdef __cplusplus
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}
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#endif
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