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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2007 Advanced Micro Devices, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdint.h>
#include <cpu/x86/lapic.h>
#include "amdfam10.h"
#define NODE_ID 0x60
#define HT_INIT_CONTROL 0x6c
#define HTIC_ColdR_Detect (1<<4)
#define HTIC_BIOSR_Detect (1<<5)
#define HTIC_INIT_Detect (1<<6)
/* mmconf is not ready */
/* io_ext is not ready */
u32 cpu_init_detected(u8 nodeid)
{
u32 htic;
pci_devfn_t dev;
dev = NODE_PCI(nodeid, 0);
htic = pci_io_read_config32(dev, HT_INIT_CONTROL);
return !!(htic & HTIC_INIT_Detect);
}
u32 bios_reset_detected(void)
{
u32 htic;
htic = pci_io_read_config32(PCI_DEV(CONFIG_CBB, CONFIG_CDB, 0), HT_INIT_CONTROL);
return (htic & HTIC_ColdR_Detect) && !(htic & HTIC_BIOSR_Detect);
}
u32 cold_reset_detected(void)
{
u32 htic;
htic = pci_io_read_config32(PCI_DEV(CONFIG_CBB, CONFIG_CDB, 0), HT_INIT_CONTROL);
return !(htic & HTIC_ColdR_Detect);
}
u32 other_reset_detected(void) // other warm reset not started by BIOS
{
u32 htic;
htic = pci_io_read_config32(PCI_DEV(CONFIG_CBB, CONFIG_CDB, 0), HT_INIT_CONTROL);
return (htic & HTIC_ColdR_Detect) && (htic & HTIC_BIOSR_Detect);
}
static void distinguish_cpu_resets(u8 nodeid)
{
u32 htic;
pci_devfn_t device;
device = NODE_PCI(nodeid, 0);
htic = pci_io_read_config32(device, HT_INIT_CONTROL);
htic |= HTIC_ColdR_Detect | HTIC_BIOSR_Detect | HTIC_INIT_Detect;
pci_io_write_config32(device, HT_INIT_CONTROL, htic);
}
static u32 warm_reset_detect(u8 nodeid)
{
u32 htic;
pci_devfn_t device;
device = NODE_PCI(nodeid, 0);
htic = pci_io_read_config32(device, HT_INIT_CONTROL);
return (htic & HTIC_ColdR_Detect) && !(htic & HTIC_BIOSR_Detect);
}
void set_bios_reset(void);
void set_bios_reset(void)
{
u32 nodes;
u32 htic;
pci_devfn_t dev;
int i;
nodes = ((pci_read_config32(PCI_DEV(CONFIG_CBB, CONFIG_CDB, 0), 0x60) >> 4) & 7) + 1;
for(i = 0; i < nodes; i++) {
dev = NODE_PCI(i,0);
htic = pci_read_config32(dev, HT_INIT_CONTROL);
htic &= ~HTIC_BIOSR_Detect;
pci_write_config32(dev, HT_INIT_CONTROL, htic);
}
}
/* Look up a which bus a given node/link combination is on.
* return 0 when we can't find the answer.
*/
static u8 node_link_to_bus(u8 node, u8 link) // node are 6 bit, and link three bit
{
u32 reg;
u32 val;
// put node and link in correct bit
val = ((node & 0x0f)<<4) | ((node & 0x30)<< (12-4)) | ((link & 0x07)<<8) ;
for(reg = 0xE0; reg < 0xF0; reg += 0x04) {
u32 config_map;
config_map = pci_io_read_config32(PCI_DEV(CONFIG_CBB, CONFIG_CDB, 1), reg);
if ((config_map & 3) != 3) {
continue;
}
if ((config_map & (((63 & 0x0f)<<4) | ((63 & 0x30)<< (12-4)) | ((7 & 0x07)<<8) )
) == val )
{
return (config_map >> 16) & 0xff;
}
}
return 0;
}
u32 get_sblk(void)
{
u32 reg;
/* read PCI_DEV(CONFIG_CBB,CONFIG_CDB,0) 0x64 bit [8:9] to find out SbLink m */
reg = pci_io_read_config32(PCI_DEV(CONFIG_CBB, CONFIG_CDB, 0), 0x64);
return ((reg>>8) & 3) ;
}
u8 get_sbbusn(u8 sblk)
{
return node_link_to_bus(0, sblk);
}
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