sdcard: Use the ldst API

The load/store API will ease further code movement.

Per the Physical Layer Simplified Spec. "3.6 Bus Protocol":

  "In the CMD line the Most Significant Bit (MSB) is transmitted
   first, the Least Significant Bit (LSB) is the last."

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 1 insertions, 2 deletions

diff --git a/hw/sd/milkymist-memcard.c b/hw/sd/milkymist-memcard.c
index fcbccf54ea..df42aa1c54 100644
--- a/hw/sd/milkymist-memcard.c
+++ b/hw/sd/milkymist-memcard.c
@@ -100,8 +100,7 @@ static void memcard_sd_command(MilkymistMemcardState *s)
     SDRequest req;
 
     req.cmd = s->command[0] & 0x3f;
-    req.arg = (s->command[1] << 24) | (s->command[2] << 16)
-              | (s->command[3] << 8) | s->command[4];
+    req.arg = ldl_be_p(s->command + 1);
     req.crc = s->command[5];
 
     s->response[0] = req.cmd;