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-rw-r--r--src/soc/amd/common/block/acpimmio/mmio_util.c34
-rw-r--r--src/soc/amd/common/block/include/amdblocks/acpimmio.h11
2 files changed, 44 insertions, 1 deletions
diff --git a/src/soc/amd/common/block/acpimmio/mmio_util.c b/src/soc/amd/common/block/acpimmio/mmio_util.c
index edb3882e6f..7fad456106 100644
--- a/src/soc/amd/common/block/acpimmio/mmio_util.c
+++ b/src/soc/amd/common/block/acpimmio/mmio_util.c
@@ -65,7 +65,39 @@ void pm_io_write32(uint8_t reg, uint32_t value)
pm_io_write16(reg + sizeof(uint16_t), value & 0xffff);
}
-/* smbus pci read/write - access registers at 0xfed80000 - currently unused */
+#if SUPPORTS_ACPIMMIO_SM_PCI_BASE
+/* smbus pci read/write - access registers at 0xfed80000 */
+
+u8 sm_pci_read8(u8 reg)
+{
+ return read8((void *)(ACPIMMIO_SM_PCI_BASE + reg));
+}
+
+u16 sm_pci_read16(u8 reg)
+{
+ return read16((void *)(ACPIMMIO_SM_PCI_BASE + reg));
+}
+
+u32 sm_pci_read32(u8 reg)
+{
+ return read32((void *)(ACPIMMIO_SM_PCI_BASE + reg));
+}
+
+void sm_pci_write8(u8 reg, u8 value)
+{
+ write8((void *)(ACPIMMIO_SM_PCI_BASE + reg), value);
+}
+
+void sm_pci_write16(u8 reg, u16 value)
+{
+ write16((void *)(ACPIMMIO_SM_PCI_BASE + reg), value);
+}
+
+void sm_pci_write32(u8 reg, u32 value)
+{
+ write32((void *)(ACPIMMIO_SM_PCI_BASE + reg), value);
+}
+#endif
#if SUPPORTS_ACPIMMIO_SMI_BASE
/* smi read/write - access registers at 0xfed80200 */
diff --git a/src/soc/amd/common/block/include/amdblocks/acpimmio.h b/src/soc/amd/common/block/include/amdblocks/acpimmio.h
index 59ab9e5f4f..ca57cf5dcc 100644
--- a/src/soc/amd/common/block/include/amdblocks/acpimmio.h
+++ b/src/soc/amd/common/block/include/amdblocks/acpimmio.h
@@ -21,6 +21,9 @@
#include <stdint.h>
/* iomap.h must indicate if the device uses a block, optional if unused. */
#include <soc/iomap.h>
+#ifndef SUPPORTS_ACPIMMIO_SM_PCI_BASE
+ #define SUPPORTS_ACPIMMIO_SM_PCI_BASE 0
+#endif
#ifndef SUPPORTS_ACPIMMIO_SMI_BASE
#define SUPPORTS_ACPIMMIO_SMI_BASE 0
#endif
@@ -162,6 +165,14 @@
/* Enable the AcpiMmio range at 0xfed80000 */
void enable_acpimmio_decode(void);
+/* Access SMBus PCI registers at 0xfed80000 */
+uint8_t sm_pci_read8(uint8_t reg);
+uint16_t sm_pci_read16(uint8_t reg);
+uint32_t sm_pci_read32(uint8_t reg);
+void sm_pci_write8(uint8_t reg, uint8_t value);
+void sm_pci_write16(uint8_t reg, uint16_t value);
+void sm_pci_write32(uint8_t reg, uint32_t value);
+
/* Access PM registers using IO cycles */
uint8_t pm_io_read8(uint8_t reg);
uint16_t pm_io_read16(uint8_t reg);