src/cpu/intel/model_1067x/model_1067x_init.c

/*
 * This file is part of the coreboot project.
 * 
 * Copyright (C) 2007-2009 coresystems GmbH
 *
 * 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 <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <string.h>
#include <cpu/cpu.h>
#include <cpu/x86/mtrr.h>
#include <cpu/x86/msr.h>
#include <cpu/x86/lapic.h>
#include <cpu/intel/microcode.h>
#include <cpu/intel/hyperthreading.h>
#include <cpu/x86/cache.h>
#include <cpu/x86/mtrr.h>

static const uint32_t microcode_updates[] = {
	/*  Dummy terminator  */
        0x0, 0x0, 0x0, 0x0,
        0x0, 0x0, 0x0, 0x0,
        0x0, 0x0, 0x0, 0x0,
        0x0, 0x0, 0x0, 0x0,
};

static inline void strcpy(char *dst, char *src) 
{
	while (*src) *dst++ = *src++;
}

static void init_timer(void)
{
	/* Set the apic timer to no interrupts and periodic mode */
	lapic_write(LAPIC_LVTT, (1 << 17)|(1<< 16)|(0 << 12)|(0 << 0));

	/* Set the divider to 1, no divider */
	lapic_write(LAPIC_TDCR, LAPIC_TDR_DIV_1);

	/* Set the initial counter to 0xffffffff */
	lapic_write(LAPIC_TMICT, 0xffffffff);
}

static void fill_processor_name(char *processor_name)
{
	struct cpuid_result regs;
	char temp_processor_name[49];
	char *processor_name_start;
	unsigned int *name_as_ints = (unsigned int *)temp_processor_name;
	int i;

	for (i=0; i<3; i++) {
		regs = cpuid(0x80000002 + i);
		name_as_ints[i*4 + 0] = regs.eax;
		name_as_ints[i*4 + 1] = regs.ebx;
		name_as_ints[i*4 + 2] = regs.ecx;
		name_as_ints[i*4 + 3] = regs.edx;
	}

	temp_processor_name[48] = 0;

	/* Skip leading spaces */
	processor_name_start = temp_processor_name;
	while (*processor_name_start == ' ') 
		processor_name_start++;

	memset(processor_name, 0, 49);
	strcpy(processor_name, processor_name_start);
}

#define IA32_FEATURE_CONTROL 0x003a

#define CPUID_VMX (1 << 5)
#define CPUID_SMX (1 << 6)
static void enable_vmx(void)
{
	struct cpuid_result regs;
	msr_t msr;

	msr = rdmsr(IA32_FEATURE_CONTROL);

	if (msr.lo & (1 << 0)) {
		/* VMX locked. If we set it again we get an illegal
		 * instruction
		 */
		return;
	}

	regs = cpuid(1);
	if (regs.ecx & CPUID_VMX) {
		msr.lo |= (1 << 2);
		if (regs.ecx & CPUID_SMX)
			msr.lo |= (1 << 1);
	}

	wrmsr(IA32_FEATURE_CONTROL, msr);

	msr.lo |= (1 << 0); /* Set lock bit */

	wrmsr(IA32_FEATURE_CONTROL, msr);
}

#define PMG_CST_CONFIG_CONTROL	0xe2
#define PMG_IO_BASE_ADDR	0xe3
#define PMG_IO_CAPTURE_ADDR	0xe4

#define PMB0_BASE		0x580
#define PMB1_BASE		0x800
#define CST_RANGE		2
static void configure_c_states(void)
{
	msr_t msr;

	msr = rdmsr(PMG_CST_CONFIG_CONTROL);

	msr.lo |= (1 << 15); // config lock until next reset
	msr.lo |= (1 << 14); // Deeper Sleep
	msr.lo |= (1 << 10); // Enable IO MWAIT redirection
	msr.lo &= ~(1 << 9); // Issue a  single stop grant cycle upon stpclk
	msr.lo |= (1 << 3); // Dynamic L2

	wrmsr(PMG_CST_CONFIG_CONTROL, msr);

	/* Set Processor MWAIT IO BASE */
	msr.hi = 0;
	msr.lo = ((PMB0_BASE + 4) & 0xffff) | (((PMB1_BASE + 9) & 0xffff) << 16);
	wrmsr(PMG_IO_BASE_ADDR, msr);

	/* Set IO Capture Address */
	msr.hi = 0;
	msr.lo = ((PMB0_BASE + 4) & 0xffff) | (( CST_RANGE & 0xffff) << 16);
	wrmsr(PMG_IO_CAPTURE_ADDR, msr);
}

#define IA32_MISC_ENABLE	0x1a0
static void configure_misc(void)
{
	msr_t msr;

	msr = rdmsr(IA32_MISC_ENABLE);
	msr.lo |= (1 << 3); 	/* TM1 enable */
	msr.lo |= (1 << 13);	/* TM2 enable */
	msr.lo |= (1 << 17);	/* Bidirectional PROCHOT# */

	msr.lo |= (1 << 10);	/* FERR# multiplexing */

	// TODO: Only if  IA32_PLATFORM_ID[17] = 0 and IA32_PLATFORM_ID[50] = 1
	msr.lo |= (1 << 16);	/* Enhanced SpeedStep Enable */

	/* Enable C2E */
	msr.lo |= (1 << 26);

	/* Enable C4E */
	/* TODO This should only be done on mobile CPUs, see cpuid 5 */
	msr.hi |= (1 << (32 - 32)); // C4E
	msr.hi |= (1 << (33 - 32)); // Hard C4E

	/* Enable EMTTM. */
	/* NOTE: We leave the EMTTM_CR_TABLE0-5 at their default values */
	msr.hi |= (1 << (36 - 32));

	wrmsr(IA32_MISC_ENABLE, msr);

	msr.lo |= (1 << 20);	/* Lock Enhanced SpeedStep Enable */
	wrmsr(IA32_MISC_ENABLE, msr);
}

#define PIC_SENS_CFG	0x1aa
static void configure_pic_thermal_sensors(void)
{
	msr_t msr;

	msr = rdmsr(PIC_SENS_CFG);

	msr.lo |= (1 << 21); // inter-core lock TM1
	msr.lo |= (1 << 4); // Enable bypass filter

	wrmsr(PIC_SENS_CFG, msr);
}

#if CONFIG_USBDEBUG_DIRECT
static unsigned ehci_debug_addr;
#endif
		
static void model_1067x_init(device_t cpu)
{
	char processor_name[49];

	/* Turn on caching if we haven't already */
	x86_enable_cache();

	/* Update the microcode */
	intel_update_microcode(microcode_updates);

	/* Print processor name */
	fill_processor_name(processor_name);
	printk_info("CPU: %s.\n", processor_name);

#if CONFIG_USBDEBUG_DIRECT
	// Is this caution really needed?
	if(!ehci_debug_addr) 
		ehci_debug_addr = get_ehci_debug();
	set_ehci_debug(0);
#endif

	/* Setup MTRRs */
	x86_setup_mtrrs(36);
	x86_mtrr_check();

#if CONFIG_USBDEBUG_DIRECT
	set_ehci_debug(ehci_debug_addr);
#endif

	/* Enable the local cpu apics */
	setup_lapic();

	/* Initialize the APIC timer */
	init_timer();

	/* Enable virtualization */
	enable_vmx();

	/* Configure C States */
	configure_c_states();

	/* Configure Enhanced SpeedStep and Thermal Sensors */
	configure_misc();

	/* PIC thermal sensor control */
	configure_pic_thermal_sensors();

	/* Start up my cpu siblings */
	intel_sibling_init(cpu);
}

static struct device_operations cpu_dev_ops = {
	.init     = model_1067x_init,
};

static struct cpu_device_id cpu_table[] = {
	{ X86_VENDOR_INTEL, 0x10676 }, /* Intel Core 2 Solo/Core Duo */
	{ 0, 0 },
};

static const struct cpu_driver driver __cpu_driver = {
	.ops      = &cpu_dev_ops,
	.id_table = cpu_table,
};