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console: Report an error when output buffer is exhausted

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If the console output buffer is exhausted, characters are silently dropped
from the end. Detect this condition and report an error when reading back
the characters.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass
2021-05-08 06:59:56 -06:00
committed by Tom Rini
parent 24e1e8841c
commit c1a2bb4f83
4 changed files with 58 additions and 16 deletions
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16
include/asm-generic/global_data.h
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@@ -571,30 +571,34 @@ enum gd_flags {
* @GD_FLG_RECORD: record console
*/
GD_FLG_RECORD = 0x01000,
/**
* @GD_FLG_RECORD_OVF: record console overflow
*/
GD_FLG_RECORD_OVF = 0x02000,
/**
* @GD_FLG_ENV_DEFAULT: default variable flag
*/
GD_FLG_ENV_DEFAULT = 0x02000,
GD_FLG_ENV_DEFAULT = 0x04000,
/**
* @GD_FLG_SPL_EARLY_INIT: early SPL initialization is done
*/
GD_FLG_SPL_EARLY_INIT = 0x04000,
GD_FLG_SPL_EARLY_INIT = 0x08000,
/**
* @GD_FLG_LOG_READY: log system is ready for use
*/
GD_FLG_LOG_READY = 0x08000,
GD_FLG_LOG_READY = 0x10000,
/**
* @GD_FLG_WDT_READY: watchdog is ready for use
*/
GD_FLG_WDT_READY = 0x10000,
GD_FLG_WDT_READY = 0x20000,
/**
* @GD_FLG_SKIP_LL_INIT: don't perform low-level initialization
*/
GD_FLG_SKIP_LL_INIT = 0x20000,
GD_FLG_SKIP_LL_INIT = 0x40000,
/**
* @GD_FLG_SMP_READY: SMP initialization is complete
*/
GD_FLG_SMP_READY = 0x40000,
GD_FLG_SMP_READY = 0x80000,
};
#endif /* __ASSEMBLY__ */