c6x: remove architecture

The c6x architecture was added to the kernel in 2011 at a time when
running Linux on DSPs was widely seen as the logical evolution.
It appears the trend has gone back to running Linux on Arm based SoCs
with DSP, using a better supported software ecosystem, and having better
real-time behavior for the DSP code. An example of this is TI's own
Keystone2 platform.

The upstream kernel port appears to no longer have any users. Mark
Salter remained avaialable to review patches, but mentioned that
he no longer has access to working hardware himself. Without any
users, it's best to just remove the code completely to reduce the
work for cross-architecture code changes.

Many thanks to Mark for maintaining the code for the past ten years.

Link: https://lore.kernel.org/lkml/41dc7795afda9f776d8cd0d3075f776cf586e97c.camel@redhat.com/
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 0 insertions, 68 deletions

diff --git a/arch/c6x/include/asm/irqflags.h b/arch/c6x/include/asm/irqflags.h
deleted file mode 100644
index d6cd71c02629..000000000000
--- a/arch/c6x/include/asm/irqflags.h
+++ /dev/null
@@ -1,68 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/*
- *  C6X IRQ flag handling
- *
- * Copyright (C) 2010 Texas Instruments Incorporated
- * Written by Mark Salter (msalter@redhat.com)
- */
-
-#ifndef _ASM_IRQFLAGS_H
-#define _ASM_IRQFLAGS_H
-
-#ifndef __ASSEMBLY__
-
-/* read interrupt enabled status */
-static inline unsigned long arch_local_save_flags(void)
-{
-	unsigned long flags;
-
-	asm volatile (" mvc .s2 CSR,%0\n" : "=b"(flags));
-	return flags;
-}
-
-/* set interrupt enabled status */
-static inline void arch_local_irq_restore(unsigned long flags)
-{
-	asm volatile (" mvc .s2 %0,CSR\n" : : "b"(flags) : "memory");
-}
-
-/* unconditionally enable interrupts */
-static inline void arch_local_irq_enable(void)
-{
-	unsigned long flags = arch_local_save_flags();
-	flags |= 1;
-	arch_local_irq_restore(flags);
-}
-
-/* unconditionally disable interrupts */
-static inline void arch_local_irq_disable(void)
-{
-	unsigned long flags = arch_local_save_flags();
-	flags &= ~1;
-	arch_local_irq_restore(flags);
-}
-
-/* get status and disable interrupts */
-static inline unsigned long arch_local_irq_save(void)
-{
-	unsigned long flags;
-
-	flags = arch_local_save_flags();
-	arch_local_irq_restore(flags & ~1);
-	return flags;
-}
-
-/* test flags */
-static inline int arch_irqs_disabled_flags(unsigned long flags)
-{
-	return (flags & 1) == 0;
-}
-
-/* test hardware interrupt enable bit */
-static inline int arch_irqs_disabled(void)
-{
-	return arch_irqs_disabled_flags(arch_local_save_flags());
-}
-
-#endif /* __ASSEMBLY__ */
-#endif /* __ASM_IRQFLAGS_H */