[PATCH v3 06/12] lib: sbi: Add SiFive proprietary xsfcflushdlone

[Nick Hu]

Using ISA string "xsfcflushdlone" to detect the support of the
SiFive L1D cache flush custom instruction.

Signed-off-by: Nick Hu <nick.hu at sifive.com>
Reviewed-by: Cyan Yang <cyan.yang at sifive.com>
---
 include/sbi/sbi_hart.h | 2 ++
 lib/sbi/sbi_hart.c     | 1 +
 2 files changed, 3 insertions(+)

diff --git a/include/sbi/sbi_hart.h b/include/sbi/sbi_hart.h
index dfbe8e4c..567e0130 100644
--- a/include/sbi/sbi_hart.h
+++ b/include/sbi/sbi_hart.h
@@ -81,6 +81,8 @@ enum sbi_hart_extensions {
 	SBI_HART_EXT_SSCTR,
 	/** HART has Ssstateen extension **/
 	SBI_HART_EXT_SSSTATEEN,
+	/** Hart has Xsfcflushdlone extension */
+	SBI_HART_EXT_XSF_CFLUSH_D_L1,
 
 	/** Maximum index of Hart extension */
 	SBI_HART_EXT_MAX,
diff --git a/lib/sbi/sbi_hart.c b/lib/sbi/sbi_hart.c
index 054a405c..e91e1123 100644
--- a/lib/sbi/sbi_hart.c
+++ b/lib/sbi/sbi_hart.c
@@ -715,6 +715,7 @@ const struct sbi_hart_ext_data sbi_hart_ext[] = {
 	__SBI_HART_EXT_DATA(smctr, SBI_HART_EXT_SMCTR),
 	__SBI_HART_EXT_DATA(ssctr, SBI_HART_EXT_SSCTR),
 	__SBI_HART_EXT_DATA(ssstateen, SBI_HART_EXT_SSSTATEEN),
+	__SBI_HART_EXT_DATA(xsfcflushdlone, SBI_HART_EXT_XSF_CFLUSH_D_L1),
 };
 
 _Static_assert(SBI_HART_EXT_MAX == array_size(sbi_hart_ext),
-- 
2.17.1