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console: buffer characters before console is initialized 

instead of throwing all output away when the console
is not initialized, buffer it in a kfifo and print
it later when the first console gets initialized.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sascha Hauer 2009-05-13 16:23:09 +02:00
parent 2e8254e387
commit 49321a5cd3
1 changed files with 21 additions and 10 deletions
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31
common/console.c
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@ -106,10 +106,23 @@ static int console_baudrate_set(struct device_d *dev, struct param_d *param,
return 0;
}
static struct kfifo *console_input_buffer;
static struct kfifo *console_output_buffer;
int getc_buffer_flush(void)
{
console_input_buffer = kfifo_alloc(1024);
console_output_buffer = kfifo_alloc(1024);
return 0;
}
postcore_initcall(getc_buffer_flush);
int console_register(struct console_device *newcdev)
{
struct device_d *dev = newcdev->dev;
int first = 0;
char ch;
if (newcdev->setbrg) {
newcdev->baudrate_param.set = console_baudrate_set;
@ -140,6 +153,13 @@ int console_register(struct console_device *newcdev)
list_add_tail(&newcdev->list, &console_list);
if (console_output_buffer) {
while (kfifo_getc(console_output_buffer, &ch) == 0)
console_putc(CONSOLE_STDOUT, ch);
kfifo_free(console_output_buffer);
console_output_buffer = NULL;
}
#ifndef CONFIG_HAS_EARLY_INIT
if (first)
display_banner();
@ -168,16 +188,6 @@ int getc_raw(void)
}
}
static struct kfifo *console_input_buffer;
int getc_buffer_flush(void)
{
console_input_buffer = kfifo_alloc(1024);
return 0;
}
postcore_initcall(getc_buffer_flush);
int getc(void)
{
unsigned char ch;
@ -239,6 +249,7 @@ void console_putc(unsigned int ch, char c)
switch (init) {
case CONSOLE_UNINITIALIZED:
kfifo_putc(console_output_buffer, c);
return;
#ifdef CONFIG_HAS_EARLY_INIT