soc/amd/stoneyridge: Create MMIO ACPI access functions

Now that the relationship between IO access and MMIO access has been
established, create read/write functions to access ACPI standard registers
through MMIO.

BUG=b:118049037
TEST=Build grunt

Change-Id: I32c26f342885c0d99b082be98730edcf16ab5dfc
Signed-off-by: Richard Spiegel <richard.spiegel@silverbackltd.com>
Reviewed-on: https://review.coreboot.org/c/29295
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>

2 files changed, 36 insertions, 0 deletions

diff --git a/src/soc/amd/stoneyridge/include/soc/southbridge.h b/src/soc/amd/stoneyridge/include/soc/southbridge.h
index cb9c4c6e7c..6a66b4c564 100644
--- a/src/soc/amd/stoneyridge/include/soc/southbridge.h
+++ b/src/soc/amd/stoneyridge/include/soc/southbridge.h
@@ -445,6 +445,12 @@ u32 pm_read32(u8 reg);
 void pm_write8(u8 reg, u8 value);
 void pm_write16(u8 reg, u16 value);
 void pm_write32(u8 reg, u32 value);
+u8 acpi_read8(u8 reg);
+u16 acpi_read16(u8 reg);
+u32 acpi_read32(u8 reg);
+void acpi_write8(u8 reg, u8 value);
+void acpi_write16(u8 reg, u16 value);
+void acpi_write32(u8 reg, u32 value);
 u32 misc_read32(u8 reg);
 void misc_write32(u8 reg, u32 value);
 uint8_t smi_read8(uint8_t offset);
diff --git a/src/soc/amd/stoneyridge/sb_util.c b/src/soc/amd/stoneyridge/sb_util.c
index 9daf0bbf8d..ccbde7e5d9 100644
--- a/src/soc/amd/stoneyridge/sb_util.c
+++ b/src/soc/amd/stoneyridge/sb_util.c
@@ -56,6 +56,36 @@ u32 pm_read32(u8 reg)
 	return read32((void *)(PM_MMIO_BASE + reg));
 }
 
+u8 acpi_read8(u8 reg)
+{
+	return read8((void *)(ACPI_REG_MMIO_BASE + reg));
+}
+
+u16 acpi_read16(u8 reg)
+{
+	return read16((void *)(ACPI_REG_MMIO_BASE + reg));
+}
+
+u32 acpi_read32(u8 reg)
+{
+	return read32((void *)(ACPI_REG_MMIO_BASE + reg));
+}
+
+void acpi_write8(u8 reg, u8 value)
+{
+	write8((void *)(ACPI_REG_MMIO_BASE + reg), value);
+}
+
+void acpi_write16(u8 reg, u16 value)
+{
+	write16((void *)(ACPI_REG_MMIO_BASE + reg), value);
+}
+
+void acpi_write32(u8 reg, u32 value)
+{
+	write32((void *)(ACPI_REG_MMIO_BASE + reg), value);
+}
+
 void smi_write32(uint8_t offset, uint32_t value)
 {
 	write32((void *)(APU_SMI_BASE + offset), value);