Commit c2f07fe6 authored Apr 24, 2014 by Sebastian Hesselbarth Committed by Russell King Apr 25, 2014

ARM: 8038/1: iwmmxt: explicitly check for supported architectures

iwmmxt.S requires special treatment of coprocessor access registers
for PJ4 and XScale-based CPUs. It only checks for CPU_PJ4 and drops
down to XScale-based treatment on all other architectures.

As some PJ4B also come with iWMMXt and also need PJ4 treatment,
rework the corresponding preprocessor directives to explicitly
check for supported architectures and fail on unsupported ones.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Tested-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Tested-by: Kevin Hilman <khilman@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

parent 556d3f7f

arch/arm/kernel/iwmmxt.S

+6 −2

Original line number	Diff line number	Diff line
		@@ -19,12 +19,16 @@
		#include <asm/thread_info.h>
		#include <asm/asm-offsets.h>

		#if defined(CONFIG_CPU_PJ4)
		#if defined(CONFIG_CPU_PJ4) \|\| defined(CONFIG_CPU_PJ4B)
		#define PJ4(code...) code
		#define XSC(code...)
		#else
		#elif defined(CONFIG_CPU_MOHAWK) \|\| \
		defined(CONFIG_CPU_XSC3) \|\| \
		defined(CONFIG_CPU_XSCALE)
		#define PJ4(code...)
		#define XSC(code...) code
		#else
		#error "Unsupported iWMMXt architecture"
		#endif

		#define MMX_WR0 (0x00)