arch/alpha/kernel/srmcons.c

Source file repositories/reference/linux-study-clean/arch/alpha/kernel/srmcons.c

File Facts

System
Linux kernel
Corpus path
arch/alpha/kernel/srmcons.c
Extension
.c
Size
6043 bytes
Lines
292
Domain
Architecture Layer
Bucket
arch/alpha
Inferred role
Architecture Layer: exported/initcall integration point
Status
integration implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

device_initcall(srmcons_init);

/*
 * The console driver
 */
static void
srm_console_write(struct console *co, const char *s, unsigned count)
{
	unsigned long flags;

	spin_lock_irqsave(&srmcons_callback_lock, flags);
	srmcons_do_write(NULL, s, count);
	spin_unlock_irqrestore(&srmcons_callback_lock, flags);
}

static struct tty_driver *
srm_console_device(struct console *co, int *index)
{
	*index = co->index;
	return srmcons_driver;
}

static int
srm_console_setup(struct console *co, char *options)
{
	return 0;
}

static struct console srmcons = {
	.name		= "srm",
	.write		= srm_console_write,
	.device		= srm_console_device,
	.setup		= srm_console_setup,
	.flags		= CON_PRINTBUFFER | CON_BOOT,
	.index		= -1,
};

void __init
register_srm_console(void)
{
	if (!srm_is_registered_console) {
		callback_open_console();
		register_console(&srmcons);
		srm_is_registered_console = 1;
	}
}

void __init
unregister_srm_console(void)
{
	if (srm_is_registered_console) {
		callback_close_console();
		unregister_console(&srmcons);
		srm_is_registered_console = 0;
	}
}

Annotation

Implementation Notes