2 * This file is part of the coreboot project.
4 * Copyright (C) 2007-2009 coresystems GmbH
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by 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
20 #include <console/console.h>
21 #include <device/device.h>
22 #include <device/pci.h>
25 #include <cpu/x86/mtrr.h>
26 #include <cpu/x86/msr.h>
27 #include <cpu/x86/lapic.h>
28 #include <cpu/intel/microcode.h>
29 #include <cpu/intel/hyperthreading.h>
30 #include <cpu/x86/cache.h>
31 #include <cpu/x86/mtrr.h>
32 #include <cpu/x86/name.h>
35 static const uint32_t microcode_updates[] = {
36 #include "microcode-2963-M01106C2217.h"
37 #include "microcode-2964-M04106C2218.h"
38 #include "microcode-2965-M08106C2219.h"
39 #include "microcode-3101-M04106CA107.h"
40 #include "microcode-3104-M08106CA107.h"
41 #include "microcode-3107-M10106CA107.h"
43 /* Dummy terminator */
50 #define IA32_FEATURE_CONTROL 0x003a
52 #define CPUID_VMX (1 << 5)
53 #define CPUID_SMX (1 << 6)
54 static void enable_vmx(void)
56 struct cpuid_result regs;
59 msr = rdmsr(IA32_FEATURE_CONTROL);
61 if (msr.lo & (1 << 0)) {
62 /* VMX locked. If we set it again we get an illegal
69 if (regs.ecx & CPUID_VMX) {
71 if (regs.ecx & CPUID_SMX)
75 wrmsr(IA32_FEATURE_CONTROL, msr);
77 msr.lo |= (1 << 0); /* Set lock bit */
79 wrmsr(IA32_FEATURE_CONTROL, msr);
82 #define PMG_CST_CONFIG_CONTROL 0xe2
83 #define PMG_IO_BASE_ADDR 0xe3
84 #define PMG_IO_CAPTURE_ADDR 0xe4
85 #define PMB0 0x510 /* analogous to P_BLK in cpu.asl */
86 #define PMB1 0x0 /* IO port that triggers SMI once cores are in the same state.
87 See CSM Trigger, at PMG_CST_CONFIG_CONTROL[6:4] */
88 #define HIGHEST_CLEVEL 3
89 static void configure_c_states(void)
93 msr = rdmsr(PMG_CST_CONFIG_CONTROL);
94 msr.lo |= (1 << 15); // Lock configuration
95 msr.lo |= (1 << 10); // redirect IO-based CState transition requests to MWAIT
96 msr.lo &= ~(1 << 9); // Issue a single stop grant cycle upon stpclk
97 msr.lo &= ~7; msr.lo |= HIGHEST_CLEVEL; // support at most C3
98 // TODO Do we want Deep C4 and Dynamic L2 shrinking?
99 wrmsr(PMG_CST_CONFIG_CONTROL, msr);
102 msr = rdmsr(PMG_IO_BASE_ADDR);
103 msr.lo = (PMB0 + 4) | (PMB1 << 16);
104 wrmsr(PMG_IO_BASE_ADDR, msr);
106 // set C_LVL controls
107 msr = rdmsr(PMG_IO_CAPTURE_ADDR);
108 msr.lo = (PMB0 + 4) | ((HIGHEST_CLEVEL - 2) << 16); // -2 because LVL0+1 aren't counted
109 wrmsr(PMG_IO_CAPTURE_ADDR, msr);
112 #define IA32_MISC_ENABLE 0x1a0
113 static void configure_misc(void)
117 msr = rdmsr(IA32_MISC_ENABLE);
118 msr.lo |= (1 << 3); /* TM1 enable */
119 msr.lo |= (1 << 13); /* TM2 enable */
120 msr.lo |= (1 << 17); /* Bidirectional PROCHOT# */
122 msr.lo |= (1 << 10); /* FERR# multiplexing */
124 // TODO: Only if IA32_PLATFORM_ID[17] = 0 and IA32_PLATFORM_ID[50] = 1
125 msr.lo |= (1 << 16); /* Enhanced SpeedStep Enable */
127 // TODO Do we want Deep C4 and Dynamic L2 shrinking?
128 wrmsr(IA32_MISC_ENABLE, msr);
130 msr.lo |= (1 << 20); /* Lock Enhanced SpeedStep Enable */
131 wrmsr(IA32_MISC_ENABLE, msr);
135 static unsigned ehci_debug_addr;
138 static void model_106cx_init(device_t cpu)
140 char processor_name[49];
142 /* Turn on caching if we haven't already */
145 /* Update the microcode */
146 intel_update_microcode(microcode_updates);
148 /* Print processor name */
149 fill_processor_name(processor_name);
150 printk(BIOS_INFO, "CPU: %s.\n", processor_name);
153 // Is this caution really needed?
155 ehci_debug_addr = get_ehci_debug();
164 set_ehci_debug(ehci_debug_addr);
167 /* Enable the local cpu apics */
170 /* Enable virtualization */
173 /* Configure C States */
174 configure_c_states();
176 /* Configure Enhanced SpeedStep and Thermal Sensors */
179 /* TODO: PIC thermal sensor control */
181 /* Start up my cpu siblings */
182 intel_sibling_init(cpu);
185 static struct device_operations cpu_dev_ops = {
186 .init = model_106cx_init,
189 static struct cpu_device_id cpu_table[] = {
190 { X86_VENDOR_INTEL, 0x106c0 }, /* Intel Atom 230 */
194 static const struct cpu_driver driver __cpu_driver = {
196 .id_table = cpu_table,