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authorRavi Sarawadi <ravishankar.sarawadi@intel.com>2016-09-09 14:08:50 -0700
committerAaron Durbin <adurbin@chromium.org>2016-11-01 17:31:59 +0100
commitec7293652af797b2595bec396bae8cd625afbf8e (patch)
tree0dd1005f1eb4212438817bc24aabe6b08f03209e /src/soc/intel
parent25445dca1700bea7c83e6d12c7936253ef9af8ca (diff)
soc/apollolake: Add soc core init
Add soc core init to set up the following feature MSRs: 1. C-states 2. IO/Mwait redirection BUG=chrome-os-partner:56922 BRANCH=None TEST= Check C-state functioning using 'powertop'. Check 0xE2 and 0xE4 MSR to verify IO/Mwait redirection. Signed-off-by: Ravi Sarawadi <ravishankar.sarawadi@intel.com> Change-Id: I99b66b02eb790b6b348be7c964d21ec9a6926926 Reviewed-on: https://review.coreboot.org/17168 Reviewed-by: Aaron Durbin <adurbin@chromium.org> Tested-by: build bot (Jenkins)
Diffstat (limited to 'src/soc/intel')
-rw-r--r--src/soc/intel/apollolake/cpu.c23
-rw-r--r--src/soc/intel/apollolake/include/soc/cpu.h13
-rw-r--r--src/soc/intel/apollolake/include/soc/iomap.h7
3 files changed, 41 insertions, 2 deletions
diff --git a/src/soc/intel/apollolake/cpu.c b/src/soc/intel/apollolake/cpu.c
index e67842c369..bd5cff50a9 100644
--- a/src/soc/intel/apollolake/cpu.c
+++ b/src/soc/intel/apollolake/cpu.c
@@ -25,11 +25,32 @@
#include <cpu/x86/mtrr.h>
#include <device/device.h>
#include <device/pci.h>
+#include <reg_script.h>
#include <soc/cpu.h>
+#include <soc/iomap.h>
#include <soc/smm.h>
+static const struct reg_script core_msr_script[] = {
+ /* Enable C-state and IO/MWAIT redirect */
+ REG_MSR_WRITE(MSR_PMG_CST_CONFIG_CONTROL,
+ (PKG_C_STATE_LIMIT_C2_MASK | CORE_C_STATE_LIMIT_C10_MASK
+ | IO_MWAIT_REDIRECT_MASK | CST_CFG_LOCK_MASK)),
+ /* Power Management I/O base address for I/O trapping to C-states */
+ REG_MSR_WRITE(MSR_PMG_IO_CAPTURE_BASE,
+ (ACPI_PMIO_CST_REG | (PMG_IO_BASE_CST_RNG_BLK_SIZE << 16))),
+ /* Disable C1E */
+ REG_MSR_RMW(MSR_POWER_CTL, ~0x2, 0),
+ REG_SCRIPT_END
+};
+
+static void soc_core_init(device_t cpu)
+{
+ /* Set core MSRs */
+ reg_script_run(core_msr_script);
+}
+
static struct device_operations cpu_dev_ops = {
- .init = DEVICE_NOOP,
+ .init = soc_core_init,
};
static struct cpu_device_id cpu_table[] = {
diff --git a/src/soc/intel/apollolake/include/soc/cpu.h b/src/soc/intel/apollolake/include/soc/cpu.h
index bffe4bcd8d..e94972d90b 100644
--- a/src/soc/intel/apollolake/include/soc/cpu.h
+++ b/src/soc/intel/apollolake/include/soc/cpu.h
@@ -54,6 +54,19 @@ void apollolake_init_cpus(struct device *dev);
*/
#define MB_POWER_LIMIT1_TIME_DEFAULT 0x6e
+/* Set MSR_PMG_CST_CONFIG_CONTROL[3:0] for Package C-State limit */
+#define PKG_C_STATE_LIMIT_C2_MASK 0x2
+/* Set MSR_PMG_CST_CONFIG_CONTROL[7:4] for Core C-State limit*/
+#define CORE_C_STATE_LIMIT_C10_MASK 0x70
+/* Set MSR_PMG_CST_CONFIG_CONTROL[10] to IO redirect to MWAIT */
+#define IO_MWAIT_REDIRECT_MASK 0x400
+/* Set MSR_PMG_CST_CONFIG_CONTROL[15] to lock CST_CFG [0-15] bits */
+#define CST_CFG_LOCK_MASK 0x8000
+
+#define MSR_PMG_CST_CONFIG_CONTROL 0xe2
+#define MSR_PMG_IO_CAPTURE_BASE 0xe4
+#define MSR_POWER_CTL 0x1fc
+
#define MSR_L2_QOS_MASK(reg) (0xd10 + reg)
#define MSR_IA32_PQR_ASSOC 0xc8f
/* MSR bits 33:32 encode slot number 0-3 */
diff --git a/src/soc/intel/apollolake/include/soc/iomap.h b/src/soc/intel/apollolake/include/soc/iomap.h
index 621b0a6808..d5d8f878ef 100644
--- a/src/soc/intel/apollolake/include/soc/iomap.h
+++ b/src/soc/intel/apollolake/include/soc/iomap.h
@@ -27,7 +27,12 @@
#define ACPI_PMIO_BASE 0x400
#define ACPI_PMIO_SIZE 0x100
-#define R_ACPI_PM1_TMR 0x8
+#define R_ACPI_PM1_TMR 0x8
+
+/* CST Range (R/W) IO port block size */
+#define PMG_IO_BASE_CST_RNG_BLK_SIZE 0x5
+/* ACPI PMIO Offset to C-state register*/
+#define ACPI_PMIO_CST_REG (ACPI_PMIO_BASE + 0x14)
/* Accesses to these BARs are hardcoded in FSP */
#define PMC_BAR0 0xfe042000