tty/hvc/hvc_dcc.c

1 // SPDX-License-Identifier: GPL-2.0
42 	struct earlycon_device *dev = con->data;  in dcc_early_write()
44 	uart_console_write(&dev->port, s, n, dcc_uart_console_putchar);  in dcc_early_write()
52 	while (--count && (__dcc_getstatus() & DCC_STATUS_TX))  in dcc_early_console_setup()
56 		return -ENODEV;  in dcc_early_console_setup()
58 	device->con->write = dcc_early_write;  in dcc_early_console_setup()
93  * Check if the DCC is enabled. If CONFIG_HVC_DCC_SERIALIZE_SMP is enabled,
103 	 * If we're not on core 0, but we previously confirmed that DCC is  in hvc_dcc_check()
142 	/* While we're at it, check for any input characters */  in dcc_put_work()
180  * Write characters directly to the DCC if we're on core 0 and the FIFO
181  * is empty, or write them to the FIFO if we're not.
209 	 * If we're already on core 0, and the FIFO is empty, then just  in hvc_dcc0_put_chars()
219  * Read characters directly from the DCC if we're on core 0 and the FIFO
220  * is empty, or read them from the FIFO if we're not.
250 	 * If we're already on core 0, and the FIFO is empty, then just  in hvc_dcc0_get_chars()
269 		return -ENODEV;  in hvc_dcc_console_init()
271 	/* Returns -1 if error */  in hvc_dcc_console_init()
274 	return ret < 0 ? -ENODEV : 0;  in hvc_dcc_console_init()
283 		return -ENODEV;  in hvc_dcc_init()
290 		pr_warn("**  HVC_DCC_SERIALIZE_SMP SUPPORT HAS BEEN ENABLED IN THIS KERNEL **\n");  in hvc_dcc_init()