diff --git a/src/soc/intel/baytrail/baytrail/iosf.h b/src/soc/intel/baytrail/baytrail/iosf.h
index b1f28da..cf7e559 100644
--- a/src/soc/intel/baytrail/baytrail/iosf.h
+++ b/src/soc/intel/baytrail/baytrail/iosf.h
@@ -58,6 +58,8 @@
 void iosf_bunit_write(int reg, uint32_t val);
 uint32_t iosf_dunit_read(int reg);
 void iosf_dunit_write(int reg, uint32_t val);
+uint32_t iosf_punit_read(int reg);
+void iosf_punit_write(int reg, uint32_t val);
 
 /* IOSF ports. */
 #define IOSF_PORT_AUNIT		0x00 /* IO Arbiter unit */
diff --git a/src/soc/intel/baytrail/iosf.c b/src/soc/intel/baytrail/iosf.c
index 2373d81..00a3269 100644
--- a/src/soc/intel/baytrail/iosf.c
+++ b/src/soc/intel/baytrail/iosf.c
@@ -76,6 +76,25 @@
 	              IOSF_PORT(IOSF_PORT_SYSMEMC) | IOSF_REG(reg) |
 	              IOSF_BYTE_EN;
 
+	write_iosf_reg(MCR_REG, cr);
+	write_iosf_reg(MDR_REG, val);
+}
+
+uint32_t iosf_punit_read(int reg)
+{
+	uint32_t cr = IOSF_OPCODE(IOSF_OP_READ_PMC) |
+	              IOSF_PORT(IOSF_PORT_PMC) | IOSF_REG(reg) |
+	              IOSF_BYTE_EN;
+
+	write_iosf_reg(MCR_REG, cr);
+	return read_iosf_reg(MDR_REG);
+}
+
+void iosf_punit_write(int reg, uint32_t val)
+{
+	uint32_t cr = IOSF_OPCODE(IOSF_OP_WRITE_PMC) |
+	              IOSF_PORT(IOSF_PORT_PMC) | IOSF_REG(reg) |
+	              IOSF_BYTE_EN;
 
 	write_iosf_reg(MCR_REG, cr);
 	write_iosf_reg(MDR_REG, val);