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hw/sd.c: Add comment regarding CARD_STATUS_* defines

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Add a clarifying comment about what the CARD_STATUS_[ABC]
macros are defining.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Andrzej Zaborowski <andrew.zaborowski@intel.com>
This commit is contained in:
Peter Maydell 2011-12-18 21:37:52 +01:00 committed by Andrzej Zaborowski
parent 25881d3390
commit b8d334c828
1 changed files with 5 additions and 0 deletions
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5
hw/sd.c
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@ -309,6 +309,11 @@ static void sd_set_rca(SDState *sd)
sd->rca += 0x4567; sd->rca += 0x4567;
} }
/* Card status bits, split by clear condition:
* A : According to the card current state
* B : Always related to the previous command
* C : Cleared by read
*/
#define CARD_STATUS_A 0x02004100 #define CARD_STATUS_A 0x02004100
#define CARD_STATUS_B 0x00c01e00 #define CARD_STATUS_B 0x00c01e00
#define CARD_STATUS_C 0xfd39a028 #define CARD_STATUS_C 0xfd39a028