New patch to review for coreboot: soc/intel/apollolake: Set PL2 in RAPL register

[Sumeet R Pawnikar]

Sumeet R Pawnikar ([e-mail]) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/17699

-gerrit

commit 45db7402380cb8ab8464291f1bfe52be10252d55
Author: Sumeet Pawnikar 
Date:   Fri Dec 2 18:14:19 2016 +0530

soc/intel/apollolake: Set PL2 in RAPL register

This patch sets the package power limit (PL2) value in
    RAPL register.

BUG=chrome-os-partner:60535
    TEST=Built, booted on reef and verified PL2 value.

Change-Id: I83fe854cf3e9fc92ab87f84b86e64ebb6085065f
    Signed-off-by: Sumeet Pawnikar 
---
 src/soc/intel/apollolake/chip.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/soc/intel/apollolake/chip.c b/src/soc/intel/apollolake/chip.c
index ef5908c..89a2888 100644
--- a/src/soc/intel/apollolake/chip.c
+++ b/src/soc/intel/apollolake/chip.c
@@ -243,6 +243,10 @@ static void set_power_limits(void)
    limit.lo |= (MB_POWER_LIMIT1_TIME_DEFAULT &
    	PKG_POWER_LIMIT_TIME_MASK) << PKG_POWER_LIMIT_TIME_SHIFT;

+	/* Set short term power limit PL2 to 15W */
+	limit.hi = 0xf00 & PKG_POWER_LIMIT_MASK;
+	limit.hi |= PKG_POWER_LIMIT_EN;
+
    /* Program package power limits in RAPL MSR */
    wrmsr(MSR_PKG_POWER_LIMIT, limit);
    printk(BIOS_INFO, "RAPL PL1 %d.%dW\n", tdp / power_unit,
@@ -255,6 +259,7 @@ static void set_power_limits(void)
     * PL2 (limit.hi) is invalid for small cores
     */
    write32(rapl_mmio_reg, limit.lo & ~(PKG_POWER_LIMIT_EN));
+	write32(rapl_mmio_reg + 1, limit.hi);
 }

static void soc_init(void *data)