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lib: Add platform features in boot time print

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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>
This commit is contained in:
Atish Patra
2020-05-09 16:47:31 -07:00
committed by Anup Patel
parent ec0d2a7d7d
commit 1f235ec47f
4 changed files with 158 additions and 27 deletions
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104
lib/sbi/sbi_platform.c Normal file
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@@ -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;
}