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>
22 setup_serial_console(struct pcdp_uart
*uart
)
24 #ifdef CONFIG_SERIAL_8250_CONSOLE
26 static char options
[64], *p
= options
;
28 mmio
= (uart
->addr
.address_space_id
== ACPI_ADR_SPACE_SYSTEM_MEMORY
);
29 p
+= sprintf(p
, "console=uart,%s,0x%lx",
30 mmio
? "mmio" : "io", uart
->addr
.address
);
32 p
+= sprintf(p
, ",%lu", uart
->baud
);
34 p
+= sprintf(p
, "n%d", uart
->bits
);
36 return early_serial_console_init(options
);
43 setup_vga_console(struct pcdp_vga
*vga
)
45 #if defined(CONFIG_VT) && defined(CONFIG_VGA_CONSOLE)
46 if (efi_mem_type(0xA0000) == EFI_CONVENTIONAL_MEMORY
) {
47 printk(KERN_ERR
"PCDP: VGA selected, but frame buffer is not MMIO!\n");
51 conswitchp
= &vga_con
;
52 printk(KERN_INFO
"PCDP: VGA console\n");
60 efi_setup_pcdp_console(char *cmdline
)
63 struct pcdp_uart
*uart
;
64 struct pcdp_device
*dev
, *end
;
71 printk(KERN_INFO
"PCDP: v%d at 0x%lx\n", pcdp
->rev
, __pa(pcdp
));
73 if (strstr(cmdline
, "console=hcdp")) {
76 } else if (strstr(cmdline
, "console=")) {
77 printk(KERN_INFO
"Explicit \"console=\"; ignoring PCDP\n");
81 if (pcdp
->rev
< 3 && efi_uart_console_only())
84 for (i
= 0, uart
= pcdp
->uart
; i
< pcdp
->num_uarts
; i
++, uart
++) {
85 if (uart
->flags
& PCDP_UART_PRIMARY_CONSOLE
|| serial
) {
86 if (uart
->type
== PCDP_CONSOLE_UART
) {
87 return setup_serial_console(uart
);
92 end
= (struct pcdp_device
*) ((u8
*) pcdp
+ pcdp
->length
);
93 for (dev
= (struct pcdp_device
*) (pcdp
->uart
+ pcdp
->num_uarts
);
95 dev
= (struct pcdp_device
*) ((u8
*) dev
+ dev
->length
)) {
96 if (dev
->flags
& PCDP_PRIMARY_CONSOLE
) {
97 if (dev
->type
== PCDP_CONSOLE_VGA
) {
98 return setup_vga_console((struct pcdp_vga
*) dev
);