Venkateswarlu V Vinjamuri (venkateswarlu.v.vinjamuri@intel.com) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/17168
-gerrit
commit 927487af9562ad4a11610a2b36e6808b791b1399 Author: Ravi Sarawadi ravishankar.sarawadi@intel.com Date: Fri Sep 9 14:08:50 2016 -0700
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 --- src/soc/intel/apollolake/cpu.c | 23 ++++++++++++++++++++++- src/soc/intel/apollolake/include/soc/cpu.h | 13 +++++++++++++ src/soc/intel/apollolake/include/soc/iomap.h | 7 ++++++- 3 files changed, 41 insertions(+), 2 deletions(-)
diff --git a/src/soc/intel/apollolake/cpu.c b/src/soc/intel/apollolake/cpu.c index e67842c..bd5cff5 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 bffe4bc..e94972d 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 621b0a6..d5d8f87 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