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Commit b2556da5 authored by Uwe Zeisberger's avatar Uwe Zeisberger Committed by Russell King
Browse files

[ARM] 3488/1: make icedcc_putc do the right thing 



Patch from Uwe Zeisberger

 a) use coprocessor 14
 b) make reading the dcc status volatile

Signed-off-by: default avatarUwe Zeisberger <Uwe_Zeisberger@digi.com>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 76bbb002

arch/arm/boot/compressed/misc.c

+2 −2
Original line number Diff line number Diff line
@@ -38,10 +38,10 @@ static void icedcc_putc(int ch) 
		if (--i < 0)

			return;



		asm("mrc p14, 0, %0, c0, c0, 0" : "=r" (status));

		asm volatile ("mrc p14, 0, %0, c0, c0, 0" : "=r" (status));

	} while (status & 2);



	asm("mcr p15, 0, %0, c1, c0, 0" : : "r" (ch));

	asm("mcr p14, 0, %0, c1, c0, 0" : : "r" (ch));

}



#define putc(ch)	icedcc_putc(ch)