preliminary Intel D945GCLF Atom+i945 support.

ram init fails, as the i945 driver currently only supports the mobile version
of the chipset..

Not sure how much sense it makes to check this in, but since it's a nice and
cheap board, maybe someone wants to work on this.

Signed-off-by: Stefan Reinauer <stepan@coresystems.de>
Acked-by: Ronald G. Minnich <rminnich@gmail.com>


git-svn-id: svn://svn.coreboot.org/coreboot/trunk@4879 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

1 files changed, 226 insertions, 0 deletions

diff --git a/src/cpu/intel/model_106cx/model_6cx_init.c b/src/cpu/intel/model_106cx/model_6cx_init.c
new file mode 100644
index 0000000000..91697f88a9
--- /dev/null
+++ b/src/cpu/intel/model_106cx/model_6cx_init.c
@@ -0,0 +1,226 @@
+/*
+ * 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>
+#include <usbdebug_direct.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 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 0x510 /* analogous to P_BLK in cpu.asl */
+#define PMB1 0x0	/* IO port that triggers SMI once cores are in the same state.
+			See CSM Trigger, at PMG_CST_CONFIG_CONTROL[6:4] */
+#define HIGHEST_CLEVEL		3
+static void configure_c_states(void)
+{
+	msr_t msr;
+
+	msr = rdmsr(PMG_CST_CONFIG_CONTROL);
+	msr.lo |= (1 << 15); // Lock configuration
+	msr.lo |= (1 << 10); // redirect IO-based CState transition requests to MWAIT
+	msr.lo &= ~(1 << 9); // Issue a single stop grant cycle upon stpclk
+	msr.lo &= ~7; msr.lo |= HIGHEST_CLEVEL; // support at most C3
+	// TODO Do we want Deep C4 and  Dynamic L2 shrinking?
+	wrmsr(PMG_CST_CONFIG_CONTROL, msr);
+
+	// set P_BLK address
+	msr = rdmsr(PMG_IO_BASE_ADDR);
+	msr.lo = (PMB0 + 4) | (PMB1 << 16);
+	wrmsr(PMG_IO_BASE_ADDR, msr);
+
+	// set C_LVL controls
+	msr = rdmsr(PMG_IO_CAPTURE_ADDR);
+	msr.lo = (PMB0 + 4) | ((HIGHEST_CLEVEL - 2) << 16); // -2 because LVL0+1 aren't counted
+	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 */
+
+	// TODO Do we want Deep C4 and  Dynamic L2 shrinking?
+	wrmsr(IA32_MISC_ENABLE, msr);
+
+	msr.lo |= (1 << 20);	/* Lock Enhanced SpeedStep Enable */
+	wrmsr(IA32_MISC_ENABLE, msr);
+}
+
+#if CONFIG_USBDEBUG_DIRECT
+static unsigned ehci_debug_addr;
+#endif
+
+static void model_6ex_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();
+
+	/* Enable virtualization */
+	enable_vmx();
+
+	/* Configure C States */
+	configure_c_states();
+
+	/* Configure Enhanced SpeedStep and Thermal Sensors */
+	configure_misc();
+
+	/* TODO: PIC thermal sensor control */
+
+	/* Start up my cpu siblings */
+	intel_sibling_init(cpu);
+}
+
+static struct device_operations cpu_dev_ops = {
+	.init     = model_6ex_init,
+};
+
+static struct cpu_device_id cpu_table[] = {
+	{ X86_VENDOR_INTEL, 0x06e0 }, /* Intel Core Solo/Core Duo */
+	{ X86_VENDOR_INTEL, 0x06e8 }, /* Intel Core Solo/Core Duo */
+	{ X86_VENDOR_INTEL, 0x06ec }, /* Intel Core Solo/Core Duo */
+	{ 0, 0 },
+};
+
+static const struct cpu_driver driver __cpu_driver = {
+	.ops      = &cpu_dev_ops,
+	.id_table = cpu_table,
+};
+