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lib: sbi: Detect support of debug triggers

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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>
This commit is contained in:
Himanshu Chauhan
2024-01-09 22:30:16 +05:30
committed by Anup Patel
parent 24997697ae
commit 40dac6bcfe
2 changed files with 6 additions and 0 deletions
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2
include/sbi/sbi_hart.h
View File

@@ -53,6 +53,8 @@ enum sbi_hart_extensions {
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,

4
lib/sbi/sbi_hart.c
View File

@@ -657,6 +657,7 @@ const struct sbi_hart_ext_data sbi_hart_ext[] = {
__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 @@ __pmp_skip:
/* 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