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lib: sbi: Improve system reset platform operations

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To implement the SBI SRST extension, we need two platform operations
for system reset:
1) system_reset_check() - This operation will check whether given
   reset type and reason are supported by the platform
2) system_reset() - This operation will do the actual platform
   system reset and it will not return if reset type and reason
   are supported by the platform

This patch updates system reset related code everywhere as-per above.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
This commit is contained in:
Anup Patel
2020-11-24 11:59:05 +05:30
committed by Anup Patel
parent da074796df
commit 5c429ae213
17 changed files with 137 additions and 36 deletions
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35
include/sbi/sbi_platform.h
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@@ -137,8 +137,10 @@ struct sbi_platform_operations {
*/
int (*hart_stop)(void);
/* Check whether reset type and reason supported by the platform */
int (*system_reset_check)(u32 reset_type, u32 reset_reason);
/** Reset the platform */
int (*system_reset)(u32 reset_type);
void (*system_reset)(u32 reset_type, u32 reset_reason);
/** platform specific SBI extension implementation probe function */
int (*vendor_ext_check)(long extid);
@@ -653,19 +655,38 @@ static inline void sbi_platform_timer_exit(const struct sbi_platform *plat)
}
/**
* Reset the platform
* Check whether reset type and reason supported by the platform
*
* @param plat pointer to struct sbi_platform
* @param reset_type type of reset
* @param reset_reason reason for reset
*
* @return 0 on success and negative error code on failure
* @return 0 if reset type and reason not supported and 1 if supported
*/
static inline int sbi_platform_system_reset(const struct sbi_platform *plat,
u32 reset_type)
static inline int sbi_platform_system_reset_check(
const struct sbi_platform *plat,
u32 reset_type, u32 reset_reason)
{
if (plat && sbi_platform_ops(plat)->system_reset_check)
return sbi_platform_ops(plat)->system_reset_check(reset_type,
reset_reason);
return 0;
}
/**
* Reset the platform
*
* This function will not return for supported reset type and reset reason
*
* @param plat pointer to struct sbi_platform
* @param reset_type type of reset
* @param reset_reason reason for reset
*/
static inline void sbi_platform_system_reset(const struct sbi_platform *plat,
u32 reset_type, u32 reset_reason)
{
if (plat && sbi_platform_ops(plat)->system_reset)
return sbi_platform_ops(plat)->system_reset(reset_type);
return 0;
sbi_platform_ops(plat)->system_reset(reset_type, reset_reason);
}
/**