soc/intel/common/block: Move power button SMI functions to common PMC block

This patch moves the functions update_pm1_enable and read_pm1_enable
to common block PMC. We rename the functions to pmc_update_pm1_enable and
pmc_read_pm1_enable to keep semantics consistent.

Change-Id: I9a73a6348fc22367ee2e68bf2c31823ebfefc525
Signed-off-by: Shaunak Saha <shaunak.saha@intel.com>
Reviewed-on: https://review.coreboot.org/21755
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>

src/soc/intel/common/block/include/intelblocks/pmclib.h

@@ -42,6 +42,11 @@ uint32_t soc_get_smi_status(uint32_t generic_sts);
  */
 int soc_prev_sleep_state(const struct chipset_power_state *ps,
 					int prev_sleep_state);
+
+/* PM1 */
+void pmc_update_pm1_enable(uint16_t events);
+uint16_t pmc_read_pm1_enable(void);
+
 /*
  * Function to print, clear, and return SMI status bits in SMI_STS
  * register. This function internally calls pmc_reset_smi_status with

src/soc/intel/common/block/pmc/pmclib.c

@@ -72,6 +72,23 @@ static uint32_t print_smi_status(uint32_t smi_sts)
 	return smi_sts;
 }
 
+/*
+ * Update supplied events in PM1_EN register. This does not disable any already
+ * set events.
+ */
+void pmc_update_pm1_enable(u16 events)
+{
+	u16 pm1_en = pmc_read_pm1_enable();
+	pm1_en |= events;
+	pmc_enable_pm1(pm1_en);
+}
+
+/* Read events set in PM1_EN register. */
+uint16_t pmc_read_pm1_enable(void)
+{
+	return inw(ACPI_BASE_ADDRESS + PM1_EN);
+}
+
 uint32_t pmc_clear_smi_status(void)
 {
 	uint32_t sts = pmc_reset_smi_status();