CBMEM ACPI: Move resume handler

Handler is ACPI/x86 specific so move details out of cbmem code.

With static CBMEM initialisation, ramstage will need to test for
S3 wakeup condition so publish also acpi_is_wakeup().

Change-Id: If591535448cdd24a54262b534c1a828fc13da759
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/4619
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Aaron Durbin <adurbin@google.com>

3 files changed, 24 insertions, 1 deletions

diff --git a/src/arch/x86/boot/acpi.c b/src/arch/x86/boot/acpi.c
index 96cb270814..0e09ec58c6 100644
--- a/src/arch/x86/boot/acpi.c
+++ b/src/arch/x86/boot/acpi.c
@@ -645,12 +645,18 @@ void acpi_resume(void *wake_vec)
 /* This is to be filled by SB code - startup value what was found. */
 u8 acpi_slp_type = 0;
 
-static int acpi_is_wakeup(void)
+int acpi_is_wakeup(void)
 {
 	/* Both resume from S2 and resume from S3 restart at CPU reset */
 	return (acpi_slp_type == 3 || acpi_slp_type == 2);
 }
 
+void acpi_fail_wakeup(void)
+{
+	if (acpi_slp_type == 3 || acpi_slp_type == 2)
+		acpi_slp_type = 0;
+}
+
 static acpi_rsdp_t *valid_rsdp(acpi_rsdp_t *rsdp)
 {
 	if (strncmp((char *)rsdp, RSDP_SIG, sizeof(RSDP_SIG) - 1) != 0)
diff --git a/src/arch/x86/boot/cbmem.c b/src/arch/x86/boot/cbmem.c
index bdc695c85d..01520187f9 100644
--- a/src/arch/x86/boot/cbmem.c
+++ b/src/arch/x86/boot/cbmem.c
@@ -17,6 +17,7 @@
 
 #include <console/console.h>
 #include <cbmem.h>
+#include <arch/acpi.h>
 
 #if !CONFIG_DYNAMIC_CBMEM
 void get_cbmem_table(uint64_t *base, uint64_t *size)
@@ -64,3 +65,17 @@ void *cbmem_top(void)
 }
 
 #endif /* DYNAMIC_CBMEM */
+
+#if !defined(__PRE_RAM__)
+
+/* ACPI resume needs to be cleared in the fail-to-recover case, but that
+ * condition is only handled during ramstage. */
+void cbmem_fail_resume(void)
+{
+#if CONFIG_HAVE_ACPI_RESUME
+	/* Something went wrong, our high memory area got wiped */
+	acpi_fail_wakeup();
+#endif
+}
+
+#endif /* !__PRE_RAM__ */
diff --git a/src/arch/x86/include/arch/acpi.h b/src/arch/x86/include/arch/acpi.h
index 306f7da046..d73c0469ca 100644
--- a/src/arch/x86/include/arch/acpi.h
+++ b/src/arch/x86/include/arch/acpi.h
@@ -558,6 +558,8 @@ void acpi_save_gnvs(u32 gnvs_address);
 /* 0 = S0, 1 = S1 ...*/
 extern u8 acpi_slp_type;
 
+int acpi_is_wakeup(void);
+void acpi_fail_wakeup(void);
 void acpi_resume(void *wake_vec);
 void __attribute__((weak)) mainboard_suspend_resume(void);
 void *acpi_find_wakeup_vector(void);