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authorAlexandru Gagniuc <mr.nuke.me@gmail.com>2014-04-17 23:33:50 -0500
committerAlexandru Gagniuc <mr.nuke.me@gmail.com>2014-04-18 21:58:39 +0200
commit599d668cdd8438820d9ca8f54826163662b2a6f0 (patch)
tree451bc1fdf8c75df6b7aca379f9d940f227c8e27c /src/southbridge/amd/agesa/hudson
parent2ad6ee97638e24db67a02fdb2431fe6a56d7c24d (diff)
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>
Diffstat (limited to 'src/southbridge/amd/agesa/hudson')
-rw-r--r--src/southbridge/amd/agesa/hudson/Makefile.inc4
-rw-r--r--src/southbridge/amd/agesa/hudson/smi.c43
-rw-r--r--src/southbridge/amd/agesa/hudson/smi.h21
-rw-r--r--src/southbridge/amd/agesa/hudson/smi_util.c79
4 files changed, 95 insertions, 52 deletions
diff --git a/src/southbridge/amd/agesa/hudson/Makefile.inc b/src/southbridge/amd/agesa/hudson/Makefile.inc
index b92e850664..398ca90ce3 100644
--- a/src/southbridge/amd/agesa/hudson/Makefile.inc
+++ b/src/southbridge/amd/agesa/hudson/Makefile.inc
@@ -22,8 +22,8 @@ ramstage-$(CONFIG_HAVE_ACPI_RESUME) += resume.c
romstage-y += imc.c
ramstage-y += imc.c
-smm-$(CONFIG_HAVE_SMI_HANDLER) += smihandler.c
-ramstage-$(CONFIG_HAVE_SMI_HANDLER) += smi.c
+smm-$(CONFIG_HAVE_SMI_HANDLER) += smihandler.c smi_util.c
+ramstage-$(CONFIG_HAVE_SMI_HANDLER) += smi.c smi_util.c
# ROMSIG At ROMBASE + 0x20000:
# +-----------+---------------+----------------+------------+
diff --git a/src/southbridge/amd/agesa/hudson/smi.c b/src/southbridge/amd/agesa/hudson/smi.c
index 168f2acb4a..1d58afe3f8 100644
--- a/src/southbridge/amd/agesa/hudson/smi.c
+++ b/src/southbridge/amd/agesa/hudson/smi.c
@@ -10,8 +10,6 @@
#include <console/console.h>
#include <cpu/cpu.h>
-#define HUDSON_SMI_ACPI_COMMAND 75
-
void smm_setup_structures(void *gnvs, void *tcg, void *smi1)
{
printk(BIOS_DEBUG, "smm_setup_structures STUB!!!\n");
@@ -25,44 +23,3 @@ void hudson_enable_smi_generation(void)
reg |= SMITRG0_EOS; /* Set EOS bit */
smi_write32(SMI_REG_SMITRIG0, reg);
}
-
-static void enable_smi(uint8_t smi_num)
-{
- uint8_t reg32_offset, bit_offset;
- uint32_t reg32;
-
- /* SMI sources range from [0:149] */
- if (smi_num > 149) {
- printk(BIOS_WARNING, "BUG: Invalid SMI: %u\n", smi_num);
- return;
- }
-
- /* 16 sources per register, 2 bits per source; registers are 4 bytes */
- reg32_offset = (smi_num / 16) * 4;
- bit_offset = (smi_num % 16) * 2;
-
- reg32 = smi_read32(SMI_REG_CONTROL0 + reg32_offset);
- reg32 &= ~(3 << (bit_offset));
- reg32 |= (SMI_SRC_MODE_SMI << (bit_offset));
- smi_write32(SMI_REG_CONTROL0 + reg32_offset, reg32);
-
-}
-
-/** Enable generation of SMIs for given GPE */
-void hudson_enable_gevent_smi(uint8_t gevent)
-{
- /* GEVENT pins range from [0:23] */
- if (gevent > 23) {
- printk(BIOS_WARNING, "BUG: Invalid GEVENT: %u\n", gevent);
- return;
- }
-
- /* SMI0 source is GEVENT0 and so on */
- enable_smi(gevent);
-}
-
-/** Enable SMIs on writes to ACPI SMI command port */
-void hudson_enable_acpi_cmd_smi(void)
-{
- enable_smi(HUDSON_SMI_ACPI_COMMAND);
-}
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 */
diff --git a/src/southbridge/amd/agesa/hudson/smi_util.c b/src/southbridge/amd/agesa/hudson/smi_util.c
new file mode 100644
index 0000000000..6076cd43b3
--- /dev/null
+++ b/src/southbridge/amd/agesa/hudson/smi_util.c
@@ -0,0 +1,79 @@
+/*
+ * SMM utilities used in both SMM and normal mode
+ *
+ * Copyright (C) 2014 Alexandru Gagniuc <mr.nuke.me@gmail.com>
+ * Subject to the GNU GPL v2, or (at your option) any later version.
+ */
+
+#include "smi.h"
+
+#include <console/console.h>
+
+#define HUDSON_SMI_ACPI_COMMAND 75
+
+static void configure_smi(uint8_t smi_num, uint8_t mode)
+{
+ uint8_t reg32_offset, bit_offset;
+ uint32_t reg32;
+
+ /* SMI sources range from [0:149] */
+ if (smi_num > 149) {
+ printk(BIOS_WARNING, "BUG: Invalid SMI: %u\n", smi_num);
+ return;
+ }
+
+ /* 16 sources per register, 2 bits per source; registers are 4 bytes */
+ reg32_offset = (smi_num / 16) * 4;
+ bit_offset = (smi_num % 16) * 2;
+
+ reg32 = smi_read32(SMI_REG_CONTROL0 + reg32_offset);
+ reg32 &= ~(0x3 << (bit_offset));
+ reg32 |= (mode & 0x3) << bit_offset;
+ smi_write32(SMI_REG_CONTROL0 + reg32_offset, reg32);
+}
+
+/**
+ * Configure generation of interrupts for given GEVENT pin
+ *
+ * @param gevent The GEVENT pin number. Valid values are 0 thru 23
+ * @param mode The type of event this pin should generate. Note that only
+ * SMI_MODE_SMI generates an SMI. SMI_MODE_DISABLE disables events.
+ * @param level SMI_LVL_LOW or SMI_LVL_HIGH
+ */
+void hudson_configure_gevent_smi(uint8_t gevent, uint8_t mode, uint8_t level)
+{
+ uint32_t reg32;
+ /* GEVENT pins range from [0:23] */
+ if (gevent > 23) {
+ printk(BIOS_WARNING, "BUG: Invalid GEVENT: %u\n", gevent);
+ return;
+ }
+
+ /* SMI0 source is GEVENT0 and so on */
+ configure_smi(gevent, mode);
+
+ /* And set set the trigger level */
+ reg32 = smi_read32(SMI_REG_SMITRIG0);
+ reg32 &= ~(1 << gevent);
+ reg32 |= (level & 0x1) << gevent;
+ smi_write32(SMI_REG_SMITRIG0, reg32);
+}
+
+/** Disable events from given GEVENT pin */
+void hudson_disable_gevent_smi(uint8_t gevent)
+{
+ /* GEVENT pins range from [0:23] */
+ if (gevent > 23) {
+ printk(BIOS_WARNING, "BUG: Invalid GEVENT: %u\n", gevent);
+ return;
+ }
+
+ /* SMI0 source is GEVENT0 and so on */
+ configure_smi(gevent, SMI_MODE_DISABLE);
+}
+
+/** Enable SMIs on writes to ACPI SMI command port */
+void hudson_enable_acpi_cmd_smi(void)
+{
+ configure_smi(HUDSON_SMI_ACPI_COMMAND, SMI_MODE_SMI);
+}