| /* |
| * 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. |
| */ |
| |
| #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); |
| } |