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

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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>
This commit is contained in:
Sebastian Hesselbarth 2014-04-24 22:54:58 +01:00 committed by Russell King
parent 556d3f7f4d
commit c2f07fe64d
1 changed files with 6 additions and 2 deletions
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8
arch/arm/kernel/iwmmxt.S
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@ -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)