2 * This file is part of the coreboot project.
4 * Copyright (C) 2010 Advanced Micro Devices, Inc.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; version 2 of the License.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 #include <arch/romcc_io.h>
23 #if CONFIG_SERIAL_POST == 1
43 #ifndef CONFIG_TTYS0_DIV
44 #if ((115200%CONFIG_TTYS0_BAUD) != 0)
45 #error Bad ttys0 baud rate
47 #define CONFIG_TTYS0_DIV (115200/CONFIG_TTYS0_BAUD)
48 #endif // CONFIG_TTYS0_DIV
50 #define UART_LCS CONFIG_TTYS0_LCS
52 #endif // CONFIG_SERIAL_POST == 1
54 static void sb800_enable_rom(void)
60 dev = PCI_DEV(0, 0x14, 0x03);
61 /* SB800 LPC Bridge 0:20:3:44h.
62 * BIT6: Port Enable for serial port 0x3f8-0x3ff
63 * BIT29: Port Enable for KBC port 0x60 and 0x64
64 * BIT30: Port Enable for ACPI Micro-Controller port 0x66 and 0x62
66 dword = pci_io_read_config32(dev, 0x44);
67 //dword |= (1<<6) | (1<<29) | (1<<30) ;
68 /*Turn on all of LPC IO Port decode enable */
70 pci_io_write_config32(dev, 0x44, dword);
72 /* SB800 LPC Bridge 0:20:3:48h.
73 * BIT0: Port Enable for SuperIO 0x2E-0x2F
74 * BIT1: Port Enable for SuperIO 0x4E-0x4F
75 * BIT4: Port Enable for LPC ROM Address Arrage2 (0x68-0x6C)
76 * BIT6: Port Enable for RTC IO 0x70-0x73
77 * BIT21: Port Enable for Port 0x80
79 dword = pci_io_read_config32(dev, 0x48);
80 dword |= (1<<0) | (1<<1) | (1<<4) | (1<<6) | (1<<21) ;
81 pci_io_write_config32(dev, 0x48, dword);
83 /* Enable 2MB rom access at 0xFFE00000 - 0xFFFFFFFF */
84 /* Set the 2MB enable bits */
85 word = pci_io_read_config16(dev, 0x6c);
87 pci_io_write_config16(dev, 0x6c, word);
90 static void uart_init(void)
92 #if CONFIG_SERIAL_POST == 1
93 /* disable interrupts */
94 outb(0x0, CONFIG_TTYS0_BASE + UART_IER);
96 outb(0x01, CONFIG_TTYS0_BASE + UART_FCR);
97 /* Set Baud Rate Divisor to 12 ==> 115200 Baud */
98 outb(0x80 | UART_LCS, CONFIG_TTYS0_BASE + UART_LCR);
99 outb(CONFIG_TTYS0_DIV & 0xFF, CONFIG_TTYS0_BASE + UART_DLL);
100 outb((CONFIG_TTYS0_DIV >> 8) & 0xFF, CONFIG_TTYS0_BASE + UART_DLM);
101 outb(UART_LCS, CONFIG_TTYS0_BASE + UART_LCR);
102 #endif // CONFIG_SERIAL_POST == 1
105 static void bootblock_southbridge_init(void)
107 /* Setup the rom access for 2M */