lib: sbi: Detect support of debug triggers
Detect if debug triggers, sdtrig extension, is supported
by the CPU. The support is detected by access traps and
ISA string parsing.
Signed-off-by: Himanshu Chauhan <hchauhan@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
diff --git a/include/sbi/sbi_hart.h b/include/sbi/sbi_hart.h
index 47be251..10dc3df 100644
--- a/include/sbi/sbi_hart.h
+++ b/include/sbi/sbi_hart.h
@@ -53,6 +53,8 @@
SBI_HART_EXT_ZICBOM,
/** Hart has Svpbmt extension */
SBI_HART_EXT_SVPBMT,
+ /** Hart has debug trigger extension */
+ SBI_HART_EXT_SDTRIG,
/** Maximum index of Hart extension */
SBI_HART_EXT_MAX,
diff --git a/lib/sbi/sbi_hart.c b/lib/sbi/sbi_hart.c
index 770fee0..a0ab0c6 100644
--- a/lib/sbi/sbi_hart.c
+++ b/lib/sbi/sbi_hart.c
@@ -657,6 +657,7 @@
__SBI_HART_EXT_DATA(zicboz, SBI_HART_EXT_ZICBOZ),
__SBI_HART_EXT_DATA(zicbom, SBI_HART_EXT_ZICBOM),
__SBI_HART_EXT_DATA(svpbmt, SBI_HART_EXT_SVPBMT),
+ __SBI_HART_EXT_DATA(sdtrig, SBI_HART_EXT_SDTRIG),
};
/**
@@ -898,6 +899,9 @@
/* Detect if hart supports smcntrpmf */
__check_ext_csr(SBI_HART_PRIV_VER_1_12,
CSR_MCYCLECFG, SBI_HART_EXT_SMCNTRPMF);
+ /* Detect if hart support sdtrig (debug triggers) */
+ __check_ext_csr(SBI_HART_PRIV_VER_UNKNOWN,
+ CSR_TSELECT, SBI_HART_EXT_SDTRIG);
#undef __check_ext_csr
