summaryrefslogtreecommitdiff
path: root/src/cpu
diff options
context:
space:
mode:
Diffstat (limited to 'src/cpu')
-rw-r--r--src/cpu/intel/haswell/Kconfig1
-rw-r--r--src/cpu/intel/haswell/Makefile.inc23
-rw-r--r--src/cpu/intel/haswell/haswell.h9
-rw-r--r--src/cpu/intel/haswell/haswell_init.c145
-rw-r--r--src/cpu/intel/haswell/mp_init.c550
-rw-r--r--src/cpu/intel/haswell/sipi_header.c6
-rw-r--r--src/cpu/intel/haswell/sipi_vector.S190
-rw-r--r--src/cpu/intel/haswell/smmrelocate.c25
8 files changed, 845 insertions, 104 deletions
diff --git a/src/cpu/intel/haswell/Kconfig b/src/cpu/intel/haswell/Kconfig
index bf0abbcbd6..95d0b18ff2 100644
--- a/src/cpu/intel/haswell/Kconfig
+++ b/src/cpu/intel/haswell/Kconfig
@@ -11,6 +11,7 @@ config CPU_SPECIFIC_OPTIONS
select UDELAY_LAPIC
select SMM_TSEG
select SMM_MODULES
+ select RELOCATABLE_MODULES
select CPU_MICROCODE_IN_CBFS
#select AP_IN_SIPI_WAIT
select TSC_SYNC_MFENCE
diff --git a/src/cpu/intel/haswell/Makefile.inc b/src/cpu/intel/haswell/Makefile.inc
index b2116f2dfe..a19a8c5270 100644
--- a/src/cpu/intel/haswell/Makefile.inc
+++ b/src/cpu/intel/haswell/Makefile.inc
@@ -1,5 +1,6 @@
ramstage-y += haswell_init.c
subdirs-y += ../../x86/name
+ramstage-y += mp_init.c
romstage-y += romstage.c
ramstage-$(CONFIG_GENERATE_ACPI_TABLES) += acpi.c
@@ -10,3 +11,25 @@ cpu_microcode-$(CONFIG_CPU_MICROCODE_CBFS_GENERATE) += microcode_blob.c
smm-$(CONFIG_HAVE_SMI_HANDLER) += finalize.c
cpu_incs += $(src)/cpu/intel/haswell/cache_as_ram.inc
+
+# AP startub stub
+SIPI_ELF=$(obj)/cpu/intel/haswell/sipi_vector.elf
+SIPI_BIN=$(SIPI_ELF:.elf=)
+SIPI_DOTO=$(SIPI_ELF:.elf=.o)
+
+ramstage-srcs += $(SIPI_BIN)
+rmodules-y += sipi_vector.S
+rmodules-y += sipi_header.c
+
+$(SIPI_DOTO): $(dir $(SIPI_ELF))sipi_vector.rmodules.o $(dir $(SIPI_ELF))sipi_header.rmodules.o
+ $(CC) $(LDFLAGS) -nostdlib -r -o $@ $^
+
+$(eval $(call rmodule_link,$(SIPI_ELF), $(SIPI_ELF:.elf=.o), 0))
+
+$(SIPI_BIN): $(SIPI_ELF)
+ $(OBJCOPY) -O binary $< $@
+
+$(SIPI_BIN).ramstage.o: $(SIPI_BIN)
+ @printf " OBJCOPY $(subst $(obj)/,,$(@))\n"
+ cd $(dir $@); $(OBJCOPY) -I binary $(notdir $<) -O elf32-i386 -B i386 $(notdir $@)
+
diff --git a/src/cpu/intel/haswell/haswell.h b/src/cpu/intel/haswell/haswell.h
index 733ddd3039..26807e9f3a 100644
--- a/src/cpu/intel/haswell/haswell.h
+++ b/src/cpu/intel/haswell/haswell.h
@@ -141,8 +141,17 @@ void intel_cpu_haswell_finalize_smm(void);
/* Configure power limits for turbo mode */
void set_power_limits(u8 power_limit_1_time);
int cpu_config_tdp_levels(void);
+/* Returns 0 on success, < 0 on failure. */
+int smm_initialize(void);
+void smm_initiate_relocation(void);
struct bus;
void bsp_init_and_start_aps(struct bus *cpu_bus);
+/* Returns 0 on succes. < 0 on failure. */
+int setup_ap_init(struct bus *cpu_bus, int *max_cpus,
+ const void *microcode_patch);
+/* Returns 0 on success, < 0 on failure. */
+int start_aps(struct bus *cpu_bus, int max_cpus);
+void release_aps_for_smm_relocation(void);
#endif
#endif
diff --git a/src/cpu/intel/haswell/haswell_init.c b/src/cpu/intel/haswell/haswell_init.c
index 9e62b31eb9..82430b750d 100644
--- a/src/cpu/intel/haswell/haswell_init.c
+++ b/src/cpu/intel/haswell/haswell_init.c
@@ -442,71 +442,30 @@ static void configure_mca(void)
static unsigned ehci_debug_addr;
#endif
-/*
- * Initialize any extra cores/threads in this package.
- */
-static void intel_cores_init(device_t cpu)
-{
- struct cpuid_result result;
- unsigned threads_per_package, threads_per_core, i;
-
- /* Logical processors (threads) per core */
- result = cpuid_ext(0xb, 0);
- threads_per_core = result.ebx & 0xffff;
-
- /* Logical processors (threads) per package */
- result = cpuid_ext(0xb, 1);
- threads_per_package = result.ebx & 0xffff;
-
- /* Only initialize extra cores from BSP */
- if (cpu->path.apic.apic_id)
- return;
-
- printk(BIOS_DEBUG, "CPU: %u has %u cores, %u threads per core\n",
- cpu->path.apic.apic_id, threads_per_package/threads_per_core,
- threads_per_core);
-
- for (i = 1; i < threads_per_package; ++i) {
- struct device_path cpu_path;
- device_t new;
-
- /* Build the cpu device path */
- cpu_path.type = DEVICE_PATH_APIC;
- cpu_path.apic.apic_id =
- cpu->path.apic.apic_id + i;
-
- /* Update APIC ID if no hyperthreading */
- if (threads_per_core == 1)
- cpu_path.apic.apic_id <<= 1;
-
- /* Allocate the new cpu device structure */
- new = alloc_dev(cpu->bus, &cpu_path);
- if (!new)
- continue;
-
- printk(BIOS_DEBUG, "CPU: %u has core %u\n",
- cpu->path.apic.apic_id,
- new->path.apic.apic_id);
-
-#if CONFIG_SMP && CONFIG_MAX_CPUS > 1
- /* Start the new cpu */
- if (!start_cpu(new)) {
- /* Record the error in cpu? */
- printk(BIOS_ERR, "CPU %u would not start!\n",
- new->path.apic.apic_id);
- }
-#endif
- }
-}
-
-static void bsp_init_before_ap_bringup(void)
+static void bsp_init_before_ap_bringup(struct bus *cpu_bus)
{
+ struct device_path cpu_path;
+ struct cpu_info *info;
char processor_name[49];
/* Print processor name */
fill_processor_name(processor_name);
printk(BIOS_INFO, "CPU: %s.\n", processor_name);
+ /* Ensure the local apic is enabled */
+ enable_lapic();
+
+ /* Set the device path of the boot cpu. */
+ cpu_path.type = DEVICE_PATH_APIC;
+ cpu_path.apic.apic_id = lapicid();
+
+ /* Find the device structure for the boot cpu. */
+ info = cpu_info();
+ info->cpu = alloc_find_dev(cpu_bus, &cpu_path);
+
+ if (info->index != 0)
+ printk(BIOS_CRIT, "BSP index(%d) != 0!\n", info->index);
+
#if CONFIG_USBDEBUG
// Is this caution really needed?
if(!ehci_debug_addr)
@@ -523,23 +482,12 @@ static void bsp_init_before_ap_bringup(void)
set_ehci_debug(ehci_debug_addr);
#endif
- enable_lapic();
-}
-
-static void ap_init(device_t cpu)
-{
- /* Microcode needs to be loaded before caching is enabled. */
- intel_update_microcode_from_cbfs();
-
- /* Turn on caching if we haven't already */
- x86_enable_cache();
- x86_setup_fixed_mtrrs();
- x86_setup_var_mtrrs(cpuid_eax(0x80000008) & 0xff, 2);
-
- enable_lapic();
+ /* Call through the cpu driver's initialization. */
+ cpu_initialize(0);
}
-static void cpu_common_init(device_t cpu)
+/* All CPUs including BSP will run the following function. */
+static void haswell_init(device_t cpu)
{
/* Clear out pending MCEs */
configure_mca();
@@ -572,33 +520,40 @@ static void cpu_common_init(device_t cpu)
void bsp_init_and_start_aps(struct bus *cpu_bus)
{
+ int max_cpus;
+ int num_aps;
+ const void *microcode_patch;
+
/* Perform any necesarry BSP initialization before APs are brought up.
* This call alos allows the BSP to prepare for any secondary effects
* from calling cpu_initialize() such as smm_init(). */
- bsp_init_before_ap_bringup();
-
- /*
- * This calls into the gerneic initialize_cpus() which attempts to
- * start APs on the APIC bus in the devicetree. No APs get started
- * because there is only the BSP and a placeholder (disabled) in the
- * devicetree. initialize_cpus() also does SMM initialization by way
- * of smm_init(). It will eventually call cpu_initialize(0) which calls
- * dev_ops->init(). For Haswell the dev_ops->init() starts up the APs
- * by way of intel_cores_init().
- */
- initialize_cpus(cpu_bus);
-}
+ bsp_init_before_ap_bringup(cpu_bus);
-static void haswell_init(device_t cpu)
-{
- if (cpu->path.apic.apic_id == 0) {
- cpu_common_init(cpu);
- /* Start up extra cores */
- intel_cores_init(cpu);
- } else {
- ap_init(cpu);
- cpu_common_init(cpu);
+ microcode_patch = intel_microcode_find();
+
+ /* This needs to be called after the mtrr setup so the BSP mtrrs
+ * can be mirrored by the APs. */
+ if (setup_ap_init(cpu_bus, &max_cpus, microcode_patch)) {
+ printk(BIOS_CRIT, "AP setup initialization failed. "
+ "No APs will be brought up.\n");
+ return;
+ }
+
+ num_aps = max_cpus - 1;
+ if (start_aps(cpu_bus, num_aps)) {
+ printk(BIOS_CRIT, "AP startup failed. Trying to continue.\n");
}
+
+ if (smm_initialize()) {
+ printk(BIOS_CRIT, "SMM Initialiazation failed...\n");
+ return;
+ }
+
+ /* Release APs to perform SMM relocation. */
+ release_aps_for_smm_relocation();
+
+ /* After SMM relocation a 2nd microcode load is required. */
+ intel_microcode_load_unlocked(microcode_patch);
}
static struct device_operations cpu_dev_ops = {
diff --git a/src/cpu/intel/haswell/mp_init.c b/src/cpu/intel/haswell/mp_init.c
new file mode 100644
index 0000000000..b1567ba3e4
--- /dev/null
+++ b/src/cpu/intel/haswell/mp_init.c
@@ -0,0 +1,550 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2013 ChromeOS Authors
+ *
+ * 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 <stdint.h>
+#include <rmodule.h>
+#include <arch/cpu.h>
+#include <cpu/cpu.h>
+#include <cpu/intel/microcode.h>
+#include <cpu/x86/cache.h>
+#include <cpu/x86/lapic.h>
+#include <cpu/x86/msr.h>
+#include <cpu/x86/mtrr.h>
+#include <cpu/x86/smm.h>
+#include <delay.h>
+#include <device/device.h>
+#include <device/path.h>
+#include <lib.h>
+#include <smp/atomic.h>
+#include <smp/spinlock.h>
+#include "haswell.h"
+
+/* This needs to match the layout in the .module_parametrs section. */
+struct sipi_params {
+ u16 gdtlimit;
+ u32 gdt;
+ u16 unused;
+ u32 idt_ptr;
+ u32 stack_top;
+ u32 stack_size;
+ u32 microcode_ptr;
+ u32 msr_table_ptr;
+ u32 msr_count;
+ u32 c_handler;
+ u32 c_handler_arg;
+ u8 apic_to_cpu_num[CONFIG_MAX_CPUS];
+} __attribute__((packed));
+
+/* This also needs to match the assembly code for saved MSR encoding. */
+struct saved_msr {
+ u32 index;
+ u32 lo;
+ u32 hi;
+} __attribute__((packed));
+
+
+/* The sipi vector rmodule is included in the ramstage using 'objdump -B'. */
+extern char _binary_sipi_vector_start[];
+/* These symbols are defined in c_start.S. */
+extern char gdt[];
+extern char gdt_limit[];
+extern char idtarg[];
+
+/* This table keeps track of each CPU's APIC id. */
+static u8 apic_id_table[CONFIG_MAX_CPUS];
+static device_t cpu_devs[CONFIG_MAX_CPUS];
+
+/* Number of APs checked that have checked in. */
+static atomic_t num_aps;
+/* Barrier to stop APs from performing SMM relcoation. */
+static int smm_relocation_barrier_begin __attribute__ ((aligned (64)));
+
+static inline void wait_for_barrier(volatile int *barrier)
+{
+ while (*barrier == 0) {
+ asm ("pause");
+ }
+}
+
+static inline void release_barrier(volatile int *barrier)
+{
+ *barrier = 1;
+}
+
+static void ap_wait_for_smm_relocation_begin(void)
+{
+ wait_for_barrier(&smm_relocation_barrier_begin);
+}
+
+
+/* Returns 1 if timeout waiting for APs. 0 if target aps found. */
+static int wait_for_aps(int target, int total_delay, int delay_step)
+{
+ int timeout = 0;
+ int delayed = 0;
+ while (atomic_read(&num_aps) != target) {
+ udelay(delay_step);
+ delayed += delay_step;
+ if (delayed >= total_delay) {
+ timeout = 1;
+ break;
+ }
+ }
+
+ return timeout;
+}
+
+void release_aps_for_smm_relocation(void)
+{
+ release_barrier(&smm_relocation_barrier_begin);
+}
+
+/* The mtrr code sets up ROM caching on the BSP, but not the others. However,
+ * the boot loader payload disables this. In order for Linux not to complain
+ * ensure the caching is disabled for tha APs before going to sleep. */
+static void cleanup_rom_caching(void)
+{
+#if CONFIG_CACHE_ROM
+ msr_t msr;
+ unsigned int last_var_mtrr;
+
+ msr = rdmsr(MTRRcap_MSR);
+ last_var_mtrr = (msr.lo & 0xff) - 1;
+
+ /* Check if the MTRR is valid. */
+ msr = rdmsr(MTRRphysMask_MSR(last_var_mtrr));
+ if ((msr.lo & MTRRphysMaskValid) == 0)
+ return;
+ msr = rdmsr(MTRRphysBase_MSR(last_var_mtrr));
+ /* Assum that if the MTRR is of write protected type, the MTRR is used
+ * to cache the ROM. */
+ if ((msr.lo & MTRR_NUM_TYPES) == MTRR_TYPE_WRPROT) {
+ msr.lo = msr.hi = 0;
+ disable_cache();
+ wrmsr(MTRRphysMask_MSR(last_var_mtrr), msr);
+ wrmsr(MTRRphysBase_MSR(last_var_mtrr), msr);
+ enable_cache();
+ }
+#endif
+}
+
+/* By the time APs call ap_init() caching has been setup, and microcode has
+ * been loaded. */
+static void ap_init(unsigned int cpu, void *microcode_ptr)
+{
+ struct cpu_info *info;
+
+ /* Signal that the AP has arrived. */
+ atomic_inc(&num_aps);
+
+ /* Ensure the local apic is enabled */
+ enable_lapic();
+
+ info = cpu_info();
+ info->index = cpu;
+ info->cpu = cpu_devs[cpu];
+
+ apic_id_table[info->index] = lapicid();
+ info->cpu->path.apic.apic_id = apic_id_table[info->index];
+
+ /* Call through the cpu driver's initialization. */
+ cpu_initialize(info->index);
+
+ ap_wait_for_smm_relocation_begin();
+
+ smm_initiate_relocation();
+
+ /* After SMM relocation a 2nd microcode load is required. */
+ intel_microcode_load_unlocked(microcode_ptr);
+
+ /* Cleanup ROM caching. */
+ cleanup_rom_caching();
+
+ /* FIXME(adurbin): park CPUs properly -- preferably somewhere in a
+ * reserved part of memory that the OS cannot get to. */
+ stop_this_cpu();
+}
+
+static void setup_default_sipi_vector_params(struct sipi_params *sp)
+{
+ int i;
+
+ sp->gdt = (u32)&gdt;
+ sp->gdtlimit = (u32)&gdt_limit;
+ sp->idt_ptr = (u32)&idtarg;
+ sp->stack_size = CONFIG_STACK_SIZE;
+ sp->stack_top = (u32)&_estack;
+ /* Adjust the stack top to take into account cpu_info. */
+ sp->stack_top -= sizeof(struct cpu_info);
+ /* Default to linear APIC id space. */
+ for (i = 0; i < CONFIG_MAX_CPUS; i++)
+ sp->apic_to_cpu_num[i] = i;
+}
+
+#define NUM_FIXED_MTRRS 11
+static unsigned int fixed_mtrrs[NUM_FIXED_MTRRS] = {
+ MTRRfix64K_00000_MSR, MTRRfix16K_80000_MSR, MTRRfix16K_A0000_MSR,
+ MTRRfix4K_C0000_MSR, MTRRfix4K_C8000_MSR, MTRRfix4K_D0000_MSR,
+ MTRRfix4K_D8000_MSR, MTRRfix4K_E0000_MSR, MTRRfix4K_E8000_MSR,
+ MTRRfix4K_F0000_MSR, MTRRfix4K_F8000_MSR,
+};
+
+static inline struct saved_msr *save_msr(int index, struct saved_msr *entry)
+{
+ msr_t msr;
+
+ msr = rdmsr(index);
+ entry->index = index;
+ entry->lo = msr.lo;
+ entry->hi = msr.hi;
+
+ /* Return the next entry. */
+ entry++;
+ return entry;
+}
+
+static int save_bsp_msrs(char *start, int size)
+{
+ int msr_count;
+ int num_var_mtrrs;
+ struct saved_msr *msr_entry;
+ int i;
+ msr_t msr;
+
+ /* Determine number of MTRRs need to be saved. */
+ msr = rdmsr(MTRRcap_MSR);
+ num_var_mtrrs = msr.lo & 0xff;
+
+ /* 2 * num_var_mtrrs for base and mask. +1 for IA32_MTRR_DEF_TYPE. */
+ msr_count = 2 * num_var_mtrrs + NUM_FIXED_MTRRS + 1;
+
+ if ((msr_count * sizeof(struct saved_msr)) > size) {
+ printk(BIOS_CRIT, "Cannot mirror all %d msrs.\n", msr_count);
+ return -1;
+ }
+
+ msr_entry = (void *)start;
+ for (i = 0; i < NUM_FIXED_MTRRS; i++) {
+ msr_entry = save_msr(fixed_mtrrs[i], msr_entry);
+ }
+
+ for (i = 0; i < num_var_mtrrs; i++) {
+ msr_entry = save_msr(MTRRphysBase_MSR(i), msr_entry);
+ msr_entry = save_msr(MTRRphysMask_MSR(i), msr_entry);
+ }
+
+ msr_entry = save_msr(MTRRdefType_MSR, msr_entry);
+
+ return msr_count;
+}
+
+/* The SIPI vector is loaded at the SMM_DEFAULT_BASE. The reason is at the
+ * memory range is already reserved so the OS cannot use it. That region is
+ * free to use for AP bringup before SMM is initialized. */
+static u32 sipi_vector_location = SMM_DEFAULT_BASE;
+static int sipi_vector_location_size = SMM_DEFAULT_SIZE;
+
+static int load_sipi_vector(const void *microcode_patch)
+{
+ struct rmodule sipi_mod;
+ int module_size;
+ int num_msrs;
+ struct sipi_params *sp;
+ char *mod_loc = (void *)sipi_vector_location;
+ const int loc_size = sipi_vector_location_size;
+
+ if (rmodule_parse(&_binary_sipi_vector_start, &sipi_mod)) {
+ printk(BIOS_CRIT, "Unable to parse sipi module.\n");
+ return -1;
+ }
+
+ if (rmodule_entry_offset(&sipi_mod) != 0) {
+ printk(BIOS_CRIT, "SIPI module entry offset is not 0!\n");
+ return -1;
+ }
+
+ if (rmodule_load_alignment(&sipi_mod) != 4096) {
+ printk(BIOS_CRIT, "SIPI module load alignment(%d) != 4096.\n",
+ rmodule_load_alignment(&sipi_mod));
+ return -1;
+ }
+
+ module_size = rmodule_memory_size(&sipi_mod);
+
+ /* Align to 4 bytes. */
+ module_size += 3;
+ module_size &= ~3;
+
+ if (module_size > loc_size) {
+ printk(BIOS_CRIT, "SIPI module size (%d) > region size (%d).\n",
+ module_size, loc_size);
+ return -1;
+ }
+
+ num_msrs = save_bsp_msrs(&mod_loc[module_size], loc_size - module_size);
+
+ if (num_msrs < 0) {
+ printk(BIOS_CRIT, "Error mirroring BSP's msrs.\n");
+ return -1;
+ }
+
+ if (rmodule_load(mod_loc, &sipi_mod)) {
+ printk(BIOS_CRIT, "Unable to load SIPI module.\n");
+ return -1;
+ }
+
+ sp = rmodule_parameters(&sipi_mod);
+
+ if (sp == NULL) {
+ printk(BIOS_CRIT, "SIPI module has no parameters.\n");
+ return -1;
+ }
+
+ setup_default_sipi_vector_params(sp);
+ /* Setup MSR table. */
+ sp->msr_table_ptr = (u32)&mod_loc[module_size];
+ sp->msr_count = num_msrs;
+ /* Provide pointer to microcode patch. */
+ sp->microcode_ptr = (u32)microcode_patch;
+ /* The microcode pointer is passed on through to the c handler so
+ * that it can be loaded again after SMM relocation. */
+ sp->c_handler_arg = (u32)microcode_patch;
+ sp->c_handler = (u32)&ap_init;
+
+ /* Make sure SIPI vector hits RAM so the APs that come up will see
+ * the startup code even if the caches are disabled. */
+ wbinvd();
+
+ return 0;
+}
+
+static int allocate_cpu_devices(struct bus *cpu_bus, int *total_hw_threads)
+{
+ int i;
+ int num_threads;
+ int num_cores;
+ int max_cpus;
+ struct cpu_info *info;
+ msr_t msr;
+
+ info = cpu_info();
+ cpu_devs[info->index] = info->cpu;
+ apic_id_table[info->index] = info->cpu->path.apic.apic_id;
+
+ msr = rdmsr(CORE_THREAD_COUNT_MSR);
+ num_threads = (msr.lo >> 0) & 0xffff;
+ num_cores = (msr.lo >> 16) & 0xffff;
+ printk(BIOS_DEBUG, "CPU has %u cores, %u threads enabled.\n",
+ num_cores, num_threads);
+
+ max_cpus = num_threads;
+ *total_hw_threads = num_threads;
+ if (num_threads > CONFIG_MAX_CPUS) {
+ printk(BIOS_CRIT, "CPU count(%d) exceeds CONFIG_MAX_CPUS(%d)\n",
+ num_threads, CONFIG_MAX_CPUS);
+ max_cpus = CONFIG_MAX_CPUS;
+ }
+
+ for (i = 1; i < max_cpus; i++) {
+ struct device_path cpu_path;
+ device_t new;
+
+ /* Build the cpu device path */
+ cpu_path.type = DEVICE_PATH_APIC;
+ cpu_path.apic.apic_id = info->cpu->path.apic.apic_id + i;
+
+ /* Allocate the new cpu device structure */
+ new = alloc_find_dev(cpu_bus, &cpu_path);
+ if (new == NULL) {
+ printk(BIOS_CRIT, "Could not allocte cpu device\n");
+ max_cpus--;
+ }
+ cpu_devs[i] = new;
+ }
+
+ return max_cpus;
+}
+
+int setup_ap_init(struct bus *cpu_bus, int *max_cpus,
+ const void *microcode_patch)
+{
+ int num_cpus;
+ int hw_threads;
+
+ /* Default to currently running CPU. */
+ num_cpus = allocate_cpu_devices(cpu_bus, &hw_threads);
+
+ /* Load the SIPI vector. */
+ if (load_sipi_vector(microcode_patch))
+ return -1;
+
+ *max_cpus = num_cpus;
+
+ if (num_cpus < hw_threads) {
+ printk(BIOS_CRIT,
+ "ERROR: More HW threads (%d) than support (%d).\n",
+ hw_threads, num_cpus);
+ return -1;
+ }
+
+ return 0;
+}
+
+/* Returns 1 for timeout. 0 on success. */
+static int apic_wait_timeout(int total_delay, int delay_step)
+{
+ int total = 0;
+ int timeout = 0;
+
+ while (lapic_read(LAPIC_ICR) & LAPIC_ICR_BUSY) {
+ udelay(delay_step);
+ total += delay_step;
+ if (total >= total_delay) {
+ timeout = 1;
+ break;
+ }
+ }
+
+ return timeout;
+}
+
+int start_aps(struct bus *cpu_bus, int ap_count)
+{
+ int sipi_vector;
+
+ if (ap_count == 0)
+ return 0;
+
+ /* The vector is sent as a 4k aligned address in one byte. */
+ sipi_vector = sipi_vector_location >> 12;
+
+ if (sipi_vector > 256) {
+ printk(BIOS_CRIT, "SIPI vector too large! 0x%08x\n",
+ sipi_vector);
+ return -1;
+ }
+
+ printk(BIOS_DEBUG, "Attempting to start %d APs\n", ap_count);
+
+ if ((lapic_read(LAPIC_ICR) & LAPIC_ICR_BUSY)) {
+ printk(BIOS_DEBUG, "Waiting for ICR not to be busy...");
+ if (apic_wait_timeout(1000 /* 1 ms */, 50)) {
+ printk(BIOS_DEBUG, "timed out. Aborting.\n");
+ return -1;
+ } else
+ printk(BIOS_DEBUG, "done.\n");
+ }
+
+ /* Send INIT IPI to all but self. */
+ lapic_write_around(LAPIC_ICR2, SET_LAPIC_DEST_FIELD(0));
+ lapic_write_around(LAPIC_ICR, LAPIC_DEST_ALLBUT | LAPIC_INT_ASSERT |
+ LAPIC_DM_INIT);
+ printk(BIOS_DEBUG, "Waiting for INIT to complete...");
+
+ /* Wait for 10 ms to complete. */
+ if (apic_wait_timeout(10000 /* 10 ms */, 100 /* us */)) {
+ printk(BIOS_DEBUG, "timed out. Bailing. \n");
+ return -1;
+ } else {
+ printk(BIOS_DEBUG, "done.\n");
+ }
+
+ /* Send 1st SIPI */
+ if ((lapic_read(LAPIC_ICR) & LAPIC_ICR_BUSY)) {
+ printk(BIOS_DEBUG, "Waiting for ICR not to be busy...");
+ if (apic_wait_timeout(1000 /* 1 ms */, 50)) {
+ printk(BIOS_DEBUG, "timed out. Aborting.\n");
+ return -1;
+ } else
+ printk(BIOS_DEBUG, "done.\n");
+ }
+
+ lapic_write_around(LAPIC_ICR2, SET_LAPIC_DEST_FIELD(0));
+ lapic_write_around(LAPIC_ICR, LAPIC_DEST_ALLBUT | LAPIC_INT_ASSERT |
+ LAPIC_DM_STARTUP | sipi_vector);
+ printk(BIOS_DEBUG, "Waiting for 1st SIPI to complete...");
+ if (apic_wait_timeout(10000 /* 10 ms */, 50 /* us */)) {
+ printk(BIOS_DEBUG, "timed out.\n");
+ return -1;
+ } else {
+ printk(BIOS_DEBUG, "done.\n");
+ }
+ /* Wait for CPUs to check in up to 200 us. */
+ wait_for_aps(ap_count, 200 /* us */, 15 /* us */);
+
+ /* Send 2nd SIPI */
+ if ((lapic_read(LAPIC_ICR) & LAPIC_ICR_BUSY)) {
+ printk(BIOS_DEBUG, "Waiting for ICR not to be busy...");
+ if (apic_wait_timeout(1000 /* 1 ms */, 50)) {
+ printk(BIOS_DEBUG, "timed out. Aborting.\n");
+ return -1;
+ } else
+ printk(BIOS_DEBUG, "done.\n");
+ }
+
+ lapic_write_around(LAPIC_ICR2, SET_LAPIC_DEST_FIELD(0));
+ lapic_write_around(LAPIC_ICR, LAPIC_DEST_ALLBUT | LAPIC_INT_ASSERT |
+ LAPIC_DM_STARTUP | sipi_vector);
+ printk(BIOS_DEBUG, "Waiting for 2nd SIPI to complete...");
+ if (apic_wait_timeout(10000 /* 10 ms */, 50 /* us */)) {
+ printk(BIOS_DEBUG, "timed out.\n");
+ return -1;
+ } else {
+ printk(BIOS_DEBUG, "done.\n");
+ }
+
+ /* Wait for CPUs to check in. */
+ if (wait_for_aps(ap_count, 10000 /* 10 ms */, 50 /* us */)) {
+ printk(BIOS_DEBUG, "Not all APs checked in: %d/%d.\n",
+ atomic_read(&num_aps), ap_count);
+ return -1;
+ }
+
+ return 0;
+}
+
+DECLARE_SPIN_LOCK(smm_relocation_lock);
+
+void smm_initiate_relocation(void)
+{
+ spin_lock(&smm_relocation_lock);
+
+ if ((lapic_read(LAPIC_ICR) & LAPIC_ICR_BUSY)) {
+ printk(BIOS_DEBUG, "Waiting for ICR not to be busy...");
+ if (apic_wait_timeout(1000 /* 1 ms */, 50)) {
+ printk(BIOS_DEBUG, "timed out. Aborting.\n");
+ spin_unlock(&smm_relocation_lock);
+ return;
+ } else
+ printk(BIOS_DEBUG, "done.\n");
+ }
+
+ lapic_write_around(LAPIC_ICR2, SET_LAPIC_DEST_FIELD(lapicid()));
+ lapic_write_around(LAPIC_ICR, LAPIC_INT_ASSERT | LAPIC_DM_SMI);
+ if (apic_wait_timeout(1000 /* 1 ms */, 100 /* us */)) {
+ printk(BIOS_DEBUG, "SMI Relocation timed out.\n");
+ } else
+ printk(BIOS_DEBUG, "Relocation complete.\n");
+
+ spin_unlock(&smm_relocation_lock);
+}
+
diff --git a/src/cpu/intel/haswell/sipi_header.c b/src/cpu/intel/haswell/sipi_header.c
new file mode 100644
index 0000000000..846a82d7c2
--- /dev/null
+++ b/src/cpu/intel/haswell/sipi_header.c
@@ -0,0 +1,6 @@
+#include <rmodule.h>
+
+
+extern void *ap_start;
+
+DEFINE_RMODULE_HEADER(sipi_vector_header, ap_start, RMODULE_TYPE_SIPI_VECTOR);
diff --git a/src/cpu/intel/haswell/sipi_vector.S b/src/cpu/intel/haswell/sipi_vector.S
new file mode 100644
index 0000000000..664a9ee8ee
--- /dev/null
+++ b/src/cpu/intel/haswell/sipi_vector.S
@@ -0,0 +1,190 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2013 ChromeOS Authors
+ *
+ * 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
+ */
+
+/* The SIPI vector is responsible for initializing the APs in the sytem. It
+ * loads microcode, sets up MSRs, and enables caching before calling into
+ * C code. */
+
+/* These segment selectors need to match the gdt entries in c_start.S. */
+#define CODE_SEG 0x10
+#define DATA_SEG 0x18
+
+#define IA32_UPDT_TRIG 0x79
+#define IA32_BIOS_SIGN_ID 0x8b
+
+.section ".module_parameters", "aw", @progbits
+ap_start_params:
+gdtaddr:
+.word 0 /* limit */
+.long 0 /* table */
+.word 0 /* unused */
+idt_ptr:
+.long 0
+stack_top:
+.long 0
+stack_size:
+.long 0
+microcode_ptr:
+.long 0
+msr_table_ptr:
+.long 0
+msr_count:
+.long 0
+c_handler:
+.long 0
+c_handler_arg:
+.long 0
+apic_to_cpu_num:
+.fill CONFIG_MAX_CPUS,1,0xff
+
+.text
+.code16
+.global ap_start
+ap_start:
+ cli
+ xorl %eax, %eax
+ movl %eax, %cr3 /* Invalidate TLB*/
+
+ /* On hyper threaded cpus, invalidating the cache here is
+ * very very bad. Don't.
+ */
+
+ /* setup the data segment */
+ movw %cs, %ax
+ movw %ax, %ds
+
+ /* The gdtaddr needs to be releative to the data segment in order
+ * to properly dereference it. The .text section comes first in an
+ * rmodule so ap_start can be used as a proxy for the load address. */
+ movl $(gdtaddr), %ebx
+ sub $(ap_start), %ebx
+
+ data32 lgdt (%ebx)
+
+ movl %cr0, %eax
+ andl $0x7FFAFFD1, %eax /* PG,AM,WP,NE,TS,EM,MP = 0 */
+ orl $0x60000001, %eax /* CD, NW, PE = 1 */
+ movl %eax, %cr0
+
+ ljmpl $CODE_SEG, $1f
+1:
+ .code32
+ movw $DATA_SEG, %ax
+ movw %ax, %ds
+ movw %ax, %es
+ movw %ax, %ss
+ movw %ax, %fs
+ movw %ax, %gs
+
+ /* Load the Interrupt descriptor table */
+ mov idt_ptr, %ebx
+ lidt (%ebx)
+
+ /* The CPU number is calculated by reading the initial APIC id. */
+ mov $1, %eax
+ cpuid
+ /* Default APIC id in ebx[31:24]. Move it to bl. */
+ bswap %ebx
+ mov $(apic_to_cpu_num), %eax
+ xor %ecx, %ecx
+
+1:
+ cmp (%eax, %ecx, 1), %bl
+ je 1f
+ inc %ecx
+ cmp $CONFIG_MAX_CPUS, %ecx
+ jne 1b
+
+ /* This is bad. No CPU number found. However, the BSP should have setup
+ * the AP handler properly. Just park the CPU. */
+ mov $0x80, %dx
+ movw $0xdead, %ax
+ outw %ax, %dx
+ jmp halt_jump
+1:
+ /* Setup stacks for each CPU. */
+ movl stack_size, %eax
+ mul %ecx
+ movl stack_top, %edx
+ subl %eax, %edx
+ mov %edx, %esp
+ /* Save cpu number. */
+ mov %ecx, %esi
+
+ /* Determine if one should check microcode versions. */
+ mov microcode_ptr, %edi
+ test %edi, %edi
+ jz 1f /* Bypass if no microde exists. */
+
+ /* Get the Microcode version. */
+ mov $1, %eax
+ cpuid
+ mov $IA32_BIOS_SIGN_ID, %ecx
+ rdmsr
+ /* If something already loaded skip loading again. */
+ test %edx, %edx
+ jnz 1f
+
+ /* Load new microcode. */
+ mov $IA32_UPDT_TRIG, %ecx
+ xor %edx, %edx
+ mov %edi, %eax
+ /* The microcode pointer is passed in pointing to the header. Adjust
+ * pointer to reflect the payload (header size is 48 bytes). */
+ add $48, %eax
+ pusha
+ wrmsr
+ popa
+
+1:
+ /*
+ * Load MSRs. Each entry in the table consists of:
+ * 0: index,
+ * 4: value[31:0]
+ * 8: value[63:32]
+ */
+ mov msr_table_ptr, %edi
+ mov msr_count, %ebx
+ test %ebx, %ebx
+ jz 1f
+load_msr:
+ mov (%edi), %ecx
+ mov 4(%edi), %eax
+ mov 8(%edi), %edx
+ wrmsr
+ add $12, %edi
+ dec %ebx
+ jnz load_msr
+
+1:
+ /* Enable caching. */
+ mov %cr0, %eax
+ and $0x9fffffff, %eax /* CD, NW = 0 */
+ mov %eax, %cr0
+
+ /* c_handler(cpu_num, *c_handler_arg) */
+ push c_handler_arg
+ push %esi /* cpu_num */
+ mov c_handler, %eax
+ call *%eax
+halt_jump:
+ hlt
+ jmp halt_jump
diff --git a/src/cpu/intel/haswell/smmrelocate.c b/src/cpu/intel/haswell/smmrelocate.c
index 1ccc9bb5b3..4312d7953e 100644
--- a/src/cpu/intel/haswell/smmrelocate.c
+++ b/src/cpu/intel/haswell/smmrelocate.c
@@ -23,6 +23,7 @@
#include <device/pci.h>
#include <cpu/cpu.h>
#include <cpu/x86/cache.h>
+#include <cpu/x86/lapic.h>
#include <cpu/x86/msr.h>
#include <cpu/x86/mtrr.h>
#include <cpu/x86/smm.h>
@@ -297,24 +298,30 @@ static int cpu_smm_setup(void)
return 0;
}
-void smm_init(void)
+int smm_initialize(void)
{
/* Return early if CPU SMM setup failed. */
if (cpu_smm_setup())
- return;
+ return -1;
southbridge_smm_init();
- /* Initiate first SMI to kick off SMM-context relocation. Note: this
- * SMI being triggered here queues up an SMI in the APs which are in
- * wait-for-SIPI state. Once an AP gets an SIPI it will service the SMI
- * at the SMM_DEFAULT_BASE before jumping to startup vector. */
- southbridge_trigger_smi();
-
- printk(BIOS_DEBUG, "Relocation complete.\n");
+ /* Run the relocation handler. */
+ smm_initiate_relocation();
/* Lock down the SMRAM space. */
smm_lock();
+
+ return 0;
+}
+
+void smm_init(void)
+{
+ /* smm_init() is normally called from initialize_cpus() in
+ * lapic_cpu_init.c. However, that path is no longer used. Don't reuse
+ * the function name because that would cause confusion.
+ * The smm_initialize() function above is used to setup SMM at the
+ * appropriate time. */
}
void smm_lock(void)