1 // SPDX-License-Identifier: GPL-2.0
17 #include <xen/hvc-console.h>
18 #include <asm/pci-direct.h>
21 #include <linux/usb/xhci-dbgp.h>
36 	while ((c = *str++) != '\0' && n-- > 0) {  in early_vga_write()
47 			current_ypos = max_ypos-1;  in early_vga_write()
52 				current_xpos--;  in early_vga_write()
76 	.index =	-1,
114 static int early_serial_putc(unsigned char ch)  in early_serial_putc()  argument
118 	while ((static_call(serial_in)(early_serial_base, LSR) & XMTRDY) == 0 && --timeout)  in early_serial_putc()
120 	static_call(serial_out)(early_serial_base, TXR, ch);  in early_serial_putc()
121 	return timeout ? 0 : -1;  in early_serial_putc()
126 	while (*s && n-- > 0) {  in early_serial_write()
216  * early_mmio_serial_init() - Initialize MMIO-based early serial console.
217  * @s: MMIO-based serial specification.
229 		/* NB: only 32-bit addresses are supported. */  in early_mmio_serial_init()
266 	u8 bus, slot, func;  in early_pci_serial_init()  local
297 	func = (u8)simple_strtoul(s, &e, 16);  in early_pci_serial_init()
307 	cmdreg = read_pci_config(bus, slot, func, PCI_COMMAND);  in early_pci_serial_init()
308 	classcode = read_pci_config(bus, slot, func, PCI_CLASS_REVISION);  in early_pci_serial_init()
309 	bar0 = read_pci_config(bus, slot, func, PCI_BASE_ADDRESS_0);  in early_pci_serial_init()
312 	 * Verify it is a 16550-UART type device  in early_pci_serial_init()
327 		write_pci_config(bus, slot, func, PCI_COMMAND,  in early_pci_serial_init()
330 		/* It is memory mapped - assume 32-bit alignment */  in early_pci_serial_init()
339 		write_pci_config(bus, slot, func, PCI_COMMAND,  in early_pci_serial_init()
370 	.index =	-1,
375 	if (con->index != -1) {  in early_console_register()
377 		       con->name);  in early_console_register()
382 		early_console->flags &= ~CON_BOOT;  in early_console_register()
384 		early_console->flags |= CON_BOOT;  in early_console_register()