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lib: sbi: Using one array to define the name of extensions

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Define an array sbi_hart_ext to map extension ID and name , and use it
for ISA parsing and printing out the supported extensions.

Signed-off-by: Yong-Xuan Wang <yongxuan.wang@sifive.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Yong-Xuan Wang 2023-12-12 08:58:34 +00:00 • committed by Anup Patel
parent 056fe6f85d
commit 776770d2ad
3 changed files with 31 additions and 50 deletions
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7
include/sbi/sbi_hart.h
View file

@ -52,6 +52,13 @@ enum sbi_hart_extensions {
SBI_HART_EXT_MAX,
};
struct sbi_hart_ext_data {
const unsigned int id;
const char *name;
};
extern const struct sbi_hart_ext_data sbi_hart_ext[];
/*
* Smepmp enforces access boundaries between M-mode and
* S/U-mode. When it is enabled, the PMPs are programmed

68
lib/sbi/sbi_hart.c
View file

@ -660,48 +660,24 @@ bool sbi_hart_has_extension(struct sbi_scratch *scratch,
return false;
}
static inline char *sbi_hart_extension_id2string(int ext)
{
char *estr = NULL;
switch (ext) {
case SBI_HART_EXT_SMAIA:
estr = "smaia";
break;
case SBI_HART_EXT_SMSTATEEN:
estr = "smstateen";
break;
case SBI_HART_EXT_SSCOFPMF:
estr = "sscofpmf";
break;
case SBI_HART_EXT_SSTC:
estr = "sstc";
break;
case SBI_HART_EXT_ZICNTR:
estr = "zicntr";
break;
case SBI_HART_EXT_ZIHPM:
estr = "zihpm";
break;
case SBI_HART_EXT_ZKR:
estr = "zkr";
break;
case SBI_HART_EXT_SMEPMP:
estr = "smepmp";
break;
case SBI_HART_EXT_SMCNTRPMF:
estr = "smcntrpmf";
break;
case SBI_HART_EXT_XANDESPMU:
estr = "xandespmu";
break;
default:
break;
}
return estr;
#define __SBI_HART_EXT_DATA(_name, _id) { \
.name = #_name, \
.id = _id, \
}
const struct sbi_hart_ext_data sbi_hart_ext[] = {
__SBI_HART_EXT_DATA(smaia, SBI_HART_EXT_SMAIA),
__SBI_HART_EXT_DATA(smepmp, SBI_HART_EXT_SMEPMP),
__SBI_HART_EXT_DATA(smstateen, SBI_HART_EXT_SMSTATEEN),
__SBI_HART_EXT_DATA(sscofpmf, SBI_HART_EXT_SSCOFPMF),
__SBI_HART_EXT_DATA(sstc, SBI_HART_EXT_SSTC),
__SBI_HART_EXT_DATA(zicntr, SBI_HART_EXT_ZICNTR),
__SBI_HART_EXT_DATA(zihpm, SBI_HART_EXT_ZIHPM),
__SBI_HART_EXT_DATA(zkr, SBI_HART_EXT_ZKR),
__SBI_HART_EXT_DATA(smcntrpmf, SBI_HART_EXT_SMCNTRPMF),
__SBI_HART_EXT_DATA(xandespmu, SBI_HART_EXT_XANDESPMU),
};
/**
* Get the hart extensions in string format
*
@ -717,20 +693,16 @@ void sbi_hart_get_extensions_str(struct sbi_scratch *scratch,
struct sbi_hart_features *hfeatures =
sbi_scratch_offset_ptr(scratch, hart_features_offset);
int offset = 0, ext = 0;
char *temp;
if (!extensions_str || nestr <= 0)
return;
sbi_memset(extensions_str, 0, nestr);
for_each_set_bit(ext, hfeatures->extensions, SBI_HART_EXT_MAX) {
temp = sbi_hart_extension_id2string(ext);
if (temp) {
sbi_snprintf(extensions_str + offset,
nestr - offset,
"%s,", temp);
offset = offset + sbi_strlen(temp) + 1;
}
sbi_snprintf(extensions_str + offset,
nestr - offset,
"%s,", sbi_hart_ext[ext].name);
offset = offset + sbi_strlen(sbi_hart_ext[ext].name) + 1;
}
if (offset)

6
lib/utils/fdt/fdt_helper.c
View file

@ -401,8 +401,10 @@ static int fdt_parse_isa_one_hart(const char *isa, unsigned long *extensions)
continue; \
}
set_multi_letter_ext("smepmp", SBI_HART_EXT_SMEPMP);
set_multi_letter_ext("zkr", SBI_HART_EXT_ZKR);
for (j = 0; j < SBI_HART_EXT_MAX; j++) {
set_multi_letter_ext(sbi_hart_ext[j].name,
sbi_hart_ext[j].id);
}
#undef set_multi_letter_ext
}