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authorDuncan Laurie <dlaurie@chromium.org>2016-09-19 12:05:49 -0700
committerDuncan Laurie <dlaurie@chromium.org>2016-09-19 19:03:34 -0700
commit3d43a7c111d00be246160a04023fe438ae0cac57 (patch)
treeae44732afcf2f6246200bc630417ba99ecb766cb /src
parent5e3dad66227bba4be9365ee76d00231bb5577b56 (diff)
downloadcoreboot-3d43a7c111d00be246160a04023fe438ae0cac57.tar.xz
soc/intel/apollolake: Add function to read and clear GPE status
Implement the generic acpi_get_gpe() function to read and clear the GPE status for a specific GPE. Tested by watching GPE status in a loop while generating interrupts manually from the EC console. BUG=chrome-os-partner:53336 Change-Id: Id885e98d48c2133a868da19eca3360e2dfb82e84 Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Diffstat (limited to 'src')
-rw-r--r--src/soc/intel/apollolake/pmutil.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/src/soc/intel/apollolake/pmutil.c b/src/soc/intel/apollolake/pmutil.c
index 2aef18c8e6..56bb33dc40 100644
--- a/src/soc/intel/apollolake/pmutil.c
+++ b/src/soc/intel/apollolake/pmutil.c
@@ -17,6 +17,7 @@
#define __SIMPLE_DEVICE__
+#include <arch/acpi.h>
#include <arch/io.h>
#include <console/console.h>
#include <cbmem.h>
@@ -301,6 +302,26 @@ uint32_t clear_gpe_status(void)
return print_gpe_sts(reset_gpe_status());
}
+/* Read and clear GPE status (defined in arch/acpi.h) */
+int acpi_get_gpe(int gpe)
+{
+ int bank;
+ uint32_t mask, sts;
+
+ if (gpe < 0 || gpe > GPE0_DW3_31)
+ return -1;
+
+ bank = gpe / 32;
+ mask = 1 << (gpe % 32);
+
+ sts = inl(ACPI_PMIO_BASE + GPE0_STS(bank));
+ if (sts & mask) {
+ outl(mask, ACPI_PMIO_BASE + GPE0_STS(bank));
+ return 1;
+ }
+ return 0;
+}
+
void clear_pmc_status(void)
{
uint32_t prsts;