2 * Parse the EFI PCDP table to locate the console device.
4 * (c) Copyright 2002, 2003, 2004 Hewlett-Packard Development Company, L.P.
5 * Khalid Aziz <khalid.aziz@hp.com>
6 * Alex Williamson <alex.williamson@hp.com>
7 * Bjorn Helgaas <bjorn.helgaas@hp.com>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include <linux/config.h>
15 #include <linux/acpi.h>
16 #include <linux/console.h>
17 #include <linux/efi.h>
18 #include <linux/serial.h>
23 setup_serial_console(struct pcdp_uart *uart)
25 #ifdef CONFIG_SERIAL_8250_CONSOLE
27 static char options[64], *p = options;
29 mmio = (uart->addr.address_space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY);
30 p += sprintf(p, "console=uart,%s,0x%lx",
31 mmio ? "mmio" : "io", uart->addr.address);
33 p += sprintf(p, ",%lu", uart->baud);
35 p += sprintf(p, "n%d", uart->bits);
37 return early_serial_console_init(options);
44 setup_vga_console(struct pcdp_device *dev)
46 #if defined(CONFIG_VT) && defined(CONFIG_VGA_CONSOLE)
49 if_ptr = ((u8 *)dev + sizeof(struct pcdp_device));
50 if (if_ptr[0] == PCDP_IF_PCI) {
51 struct pcdp_if_pci if_pci;
53 /* struct copy since ifptr might not be correctly aligned */
55 memcpy(&if_pci, if_ptr, sizeof(if_pci));
57 if (if_pci.trans & PCDP_PCI_TRANS_IOPORT)
58 vga_console_iobase = if_pci.ioport_tra;
60 if (if_pci.trans & PCDP_PCI_TRANS_MMIO)
61 vga_console_membase = if_pci.mmio_tra;
64 if (efi_mem_type(vga_console_membase + 0xA0000) == EFI_CONVENTIONAL_MEMORY) {
65 printk(KERN_ERR "PCDP: VGA selected, but frame buffer is not MMIO!\n");
69 conswitchp = &vga_con;
70 printk(KERN_INFO "PCDP: VGA console\n");
78 efi_setup_pcdp_console(char *cmdline)
81 struct pcdp_uart *uart;
82 struct pcdp_device *dev, *end;
89 printk(KERN_INFO "PCDP: v%d at 0x%lx\n", pcdp->rev, __pa(pcdp));
91 if (strstr(cmdline, "console=hcdp")) {
94 } else if (strstr(cmdline, "console=")) {
95 printk(KERN_INFO "Explicit \"console=\"; ignoring PCDP\n");
99 if (pcdp->rev < 3 && efi_uart_console_only())
102 for (i = 0, uart = pcdp->uart; i < pcdp->num_uarts; i++, uart++) {
103 if (uart->flags & PCDP_UART_PRIMARY_CONSOLE || serial) {
104 if (uart->type == PCDP_CONSOLE_UART) {
105 return setup_serial_console(uart);
110 end = (struct pcdp_device *) ((u8 *) pcdp + pcdp->length);
111 for (dev = (struct pcdp_device *) (pcdp->uart + pcdp->num_uarts);
113 dev = (struct pcdp_device *) ((u8 *) dev + dev->length)) {
114 if (dev->flags & PCDP_PRIMARY_CONSOLE) {
115 if (dev->type == PCDP_CONSOLE_VGA) {
116 return setup_vga_console(dev);