southbridge/hudson: Compile refactored SMI setup utilities in SMM

Refactor hudson_enable_gevent_smi() to allow configuring the interrupt
mode and trigger level. Move the utilities which are useful in SMM to
a separate file that is included in both ramstage and SMM. This is
useful for SMI handlers which need to enable or disable GEVENT SMIs
on-the-fly. A follow-up patch makes use of this infrastructure.

Change-Id: Ifa4c300c00c178b18d7280690cfc4b8367c669b8
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-on: http://review.coreboot.org/170
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@gmail.com>

1 files changed, 14 insertions, 7 deletions

diff --git a/src/southbridge/amd/agesa/hudson/smi.h b/src/southbridge/amd/agesa/hudson/smi.h
index 7932228280..53da00adfa 100644
--- a/src/southbridge/amd/agesa/hudson/smi.h
+++ b/src/southbridge/amd/agesa/hudson/smi.h
@@ -22,11 +22,16 @@
 
 #define SMI_REG_CONTROL0	0xa0
 
-enum smi_src_mode {
-	SMI_SRC_MODE_DISABLE = 0,
-	SMI_SRC_MODE_SMI = 1,
-	SMI_SRC_MODE_NMI = 2,
-	SMI_SRC_MODE_IRQ13 = 3,
+enum smi_mode {
+	SMI_MODE_DISABLE = 0,
+	SMI_MODE_SMI = 1,
+	SMI_MODE_NMI = 2,
+	SMI_MODE_IRQ13 = 3,
+};
+
+enum smi_lvl {
+	SMI_LVL_LOW = 0,
+	SMI_LVL_HIGH = 1,
 };
 
 static inline uint32_t smi_read32(uint8_t offset)
@@ -49,10 +54,12 @@ static inline void smi_write16(uint8_t offset, uint16_t value)
 	write16(SMI_BASE + offset, value);
 }
 
+void hudson_configure_gevent_smi(uint8_t gevent, uint8_t mode, uint8_t level);
+void hudson_disable_gevent_smi(uint8_t gevent);
+void hudson_enable_acpi_cmd_smi(void);
+
 #ifndef __SMM__
 void hudson_enable_smi_generation(void);
-void hudson_enable_gevent_smi(uint8_t gevent);
-void hudson_enable_acpi_cmd_smi(void);
 #endif
 
 #endif /* _SOUTHBRIDGE_AMD_AGESA_HUDSON_SMI_H */