a5fd0d184a
The init infrastructure, found in `init.h`, is currently used by:
- `SYS_INIT`: to call functions before `main`
- `DEVICE_*`: to initialize devices
They are all sorted according to an initialization level + a priority.
`SYS_INIT` calls are really orthogonal to devices, however, the required
function signature requires a `const struct device *dev` as a first
argument. The only reason for that is because the same init machinery is
used by devices, so we have something like:
```c
struct init_entry {
int (*init)(const struct device *dev);
/* only set by DEVICE_*, otherwise NULL */
const struct device *dev;
}
```
As a result, we end up with such weird/ugly pattern:
```c
static int my_init(const struct device *dev)
{
/* always NULL! add ARG_UNUSED to avoid compiler warning */
ARG_UNUSED(dev);
...
}
```
This is really a result of poor internals isolation. This patch proposes
a to make init entries more flexible so that they can accept sytem
initialization calls like this:
```c
static int my_init(void)
{
...
}
```
This is achieved using a union:
```c
union init_function {
/* for SYS_INIT, used when init_entry.dev == NULL */
int (*sys)(void);
/* for DEVICE*, used when init_entry.dev != NULL */
int (*dev)(const struct device *dev);
};
struct init_entry {
/* stores init function (either for SYS_INIT or DEVICE*)
union init_function init_fn;
/* stores device pointer for DEVICE*, NULL for SYS_INIT. Allows
* to know which union entry to call.
*/
const struct device *dev;
}
```
This solution **does not increase ROM usage**, and allows to offer clean
public APIs for both SYS_INIT and DEVICE*. Note that however, init
machinery keeps a coupling with devices.
**NOTE**: This is a breaking change! All `SYS_INIT` functions will need
to be converted to the new signature. See the script offered in the
following commit.
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
init: convert SYS_INIT functions to the new signature
Conversion scripted using scripts/utils/migrate_sys_init.py.
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
manifest: update projects for SYS_INIT changes
Update modules with updated SYS_INIT calls:
- hal_ti
- lvgl
- sof
- TraceRecorderSource
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
tests: devicetree: devices: adjust test
Adjust test according to the recently introduced SYS_INIT
infrastructure.
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
tests: kernel: threads: adjust SYS_INIT call
Adjust to the new signature: int (*init_fn)(void);
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
108 lines
2.1 KiB
C
108 lines
2.1 KiB
C
/*
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* Copyright (c) 2017 Oticon A/S
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <zephyr/init.h>
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#include "bs_tracing.h"
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#include "posix_board_if.h"
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#define _STDOUT_BUF_SIZE 256
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static char stdout_buff[_STDOUT_BUF_SIZE];
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static int n_pend; /* Number of pending characters in buffer */
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int print_char(int c)
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{
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int printnow = 0;
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if ((c != '\n') && (c != '\r')) {
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stdout_buff[n_pend++] = c;
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stdout_buff[n_pend] = 0;
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} else {
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printnow = 1;
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}
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if (n_pend >= _STDOUT_BUF_SIZE - 1) {
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printnow = 1;
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}
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if (printnow) {
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bs_trace_print(BS_TRACE_RAW, NULL, 0, 2, BS_TRACE_AUTOTIME, 0,
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"%s\n", stdout_buff);
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n_pend = 0;
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stdout_buff[0] = 0;
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}
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return c;
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}
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/**
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* Flush to the terminal any possible pending printk
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*/
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void posix_flush_stdout(void)
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{
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if (n_pend) {
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stdout_buff[n_pend] = 0;
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bs_trace_print(BS_TRACE_RAW, NULL, 0, 2, BS_TRACE_AUTOTIME, 0,
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"%s", stdout_buff);
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n_pend = 0;
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stdout_buff[0] = 0;
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fflush(stdout);
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}
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}
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/*
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* @brief Initialize the driver that provides the printk output
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*
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* @return 0 if successful, otherwise failed.
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*/
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static int printk_init(void)
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{
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extern void __printk_hook_install(int (*fn)(int));
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__printk_hook_install(print_char);
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return 0;
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}
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SYS_INIT(printk_init, PRE_KERNEL_1, CONFIG_PRINTK_HOOK_INIT_PRIORITY);
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void posix_print_error_and_exit(const char *format, ...)
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{
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va_list variable_argsp;
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va_start(variable_argsp, format);
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bs_trace_vprint(BS_TRACE_WARNING, NULL, 0, 0, BS_TRACE_AUTOTIME, 0,
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format, variable_argsp);
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va_end(variable_argsp);
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posix_exit(1);
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}
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void posix_print_warning(const char *format, ...)
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{
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va_list variable_argsp;
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va_start(variable_argsp, format);
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bs_trace_vprint(BS_TRACE_WARNING, NULL, 0, 0, BS_TRACE_AUTOTIME, 0,
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format, variable_argsp);
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va_end(variable_argsp);
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}
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void posix_print_trace(const char *format, ...)
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{
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va_list variable_argsp;
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va_start(variable_argsp, format);
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bs_trace_vprint(BS_TRACE_RAW, NULL, 0, 2, BS_TRACE_AUTOTIME, 0,
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format, variable_argsp);
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va_end(variable_argsp);
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}
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int posix_trace_over_tty(int file_number)
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{
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return bs_trace_is_tty(file_number);
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}
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