diff options
| author | Atish Patra <atish.patra@wdc.com> | 2020-05-09 16:47:31 -0700 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2020-05-10 10:24:08 +0530 |
| commit | 1f235ec47f85ba90916493c7eb1378b5427a66b5 (patch) | |
| tree | d686ed4d551b3e92905a08d1c887542301f9b77f /lib/sbi/sbi_platform.c | |
| parent | ec0d2a7d7d8b78193375651627aa6f65b9219afe (diff) | |
lib: Add platform features in boot time print
We have now clear distinction between platform and hart features.
Modify the boot print messages to print platform features in a string
format. In the process, this patch moved relatively larger functions
to its own file from platform.h header file.
Signed-off-by: Atish Patra <atish.patra@wdc.com>
Tested-by: Jonathan Balkind <jbalkind@cs.princeton.edu>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
Diffstat (limited to 'lib/sbi/sbi_platform.c')
| -rw-r--r-- | lib/sbi/sbi_platform.c | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/lib/sbi/sbi_platform.c b/lib/sbi/sbi_platform.c new file mode 100644 index 0000000..1912512 --- /dev/null +++ b/lib/sbi/sbi_platform.c @@ -0,0 +1,104 @@ +/* + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright (c) 2020 Western Digital Corporation or its affiliates. + * + * Authors: + * Atish Patra <atish.patra@wdc.com> + */ + +#include <sbi/sbi_console.h> +#include <sbi/sbi_platform.h> +#include <sbi/sbi_string.h> + +static inline char *sbi_platform_feature_id2string(unsigned long feature) +{ + char *fstr = NULL; + + if (!feature) + return NULL; + + switch (feature) { + case SBI_PLATFORM_HAS_TIMER_VALUE: + fstr = "timer"; + break; + case SBI_PLATFORM_HAS_HART_HOTPLUG: + fstr = "hotplug"; + break; + case SBI_PLATFORM_HAS_MFAULTS_DELEGATION: + fstr = "mfdeleg"; + break; + case SBI_PLATFORM_HAS_HART_SECONDARY_BOOT: + fstr = "sec_boot"; + break; + default: + break; + } + + return fstr; +} + +/** + * Get the platform features in string format + * + * @param plat pointer to struct sbi_platform + * @param features_str pointer to a char array where the features string will be + * updated + * @param nfstr length of the features_str. The feature string will be truncated + * if nfstr is not long enough. + * @return the features value currently set for the given platform + */ +int sbi_platform_get_features_str(const struct sbi_platform *plat, + char *features_str, int nfstr) +{ + unsigned long features, feat = 1UL; + char *temp; + int offset = 0; + + if (!plat || !features_str || !nfstr) + return SBI_EINVAL; + + features = sbi_platform_get_features(plat); + + do { + if (features & feat) { + temp = sbi_platform_feature_id2string(feat); + if (temp) { + sbi_snprintf(features_str + offset, nfstr, + "%s,", temp); + offset = offset + sbi_strlen(temp) + 1; + } + } + feat = feat << 1; + } while (feat <= SBI_PLATFORM_HAS_LAST_FEATURE); + + features_str[offset - 1] = '\0'; + + return 0; +} + +/** + * Get HART index for the given HART + * + * @param plat pointer to struct sbi_platform + * @param hartid HART ID + * + * @return 0 <= value < hart_count for valid HART otherwise -1U + */ +u32 sbi_platform_hart_index(const struct sbi_platform *plat, + u32 hartid) +{ + u32 i; + + if (!plat) + return -1U; + if (plat->hart_index2id) { + for (i = 0; i < plat->hart_count; i++) { + if (plat->hart_index2id[i] == hartid) + return i; + } + return -1U; + } + + return hartid; +} |