avr32: remove support for AVR32 architecture

This patch drops support for AVR32 architecture from the Linux kernel.

The AVR32 architecture is not keeping up with the development of the
kernel, and since it shares so much of the drivers with Atmel ARM SoC,
it is starting to hinder these drivers to develop swiftly.

Also, all AVR32 AP7 SoC processors are end of lifed from Atmel (now
Microchip).

Finally, the GCC toolchain is stuck at version 4.2.x, and has not
received any patches since the last release from Atmel;
4.2.4-atmel.1.1.3.avr32linux.1. When building kernel v4.10, this
toolchain is no longer able to properly link the network stack.

Haavard and I have came to the conclusion that we feel keeping AVR32 on
life support offers more obstacles for Atmel ARMs, than it gives joy to
AVR32 users. I also suspect there are very few AVR32 users left today,
if anybody at all.

Signed-off-by: Hans-Christian Noren Egtvedt <egtvedt@samfundet.no>
Signed-off-by: Håvard Skinnemoen <hskinnemoen@gmail.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Acked-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>

1 files changed, 0 insertions, 166 deletions

diff --git a/arch/avr32/include/asm/processor.h b/arch/avr32/include/asm/processor.h
deleted file mode 100644
index 972adcc1e8f4..000000000000
--- a/arch/avr32/include/asm/processor.h
+++ /dev/null
@@ -1,166 +0,0 @@
-/*
- * Copyright (C) 2004-2006 Atmel Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-#ifndef __ASM_AVR32_PROCESSOR_H
-#define __ASM_AVR32_PROCESSOR_H
-
-#include <asm/page.h>
-#include <asm/cache.h>
-
-#define TASK_SIZE	0x80000000
-
-#ifdef __KERNEL__
-#define STACK_TOP	TASK_SIZE
-#define STACK_TOP_MAX	STACK_TOP
-#endif
-
-#ifndef __ASSEMBLY__
-
-static inline void *current_text_addr(void)
-{
-	register void *pc asm("pc");
-	return pc;
-}
-
-enum arch_type {
-	ARCH_AVR32A,
-	ARCH_AVR32B,
-	ARCH_MAX
-};
-
-enum cpu_type {
-	CPU_MORGAN,
-	CPU_AT32AP,
-	CPU_MAX
-};
-
-enum tlb_config {
-	TLB_NONE,
-	TLB_SPLIT,
-	TLB_UNIFIED,
-	TLB_INVALID
-};
-
-#define AVR32_FEATURE_RMW	(1 << 0)
-#define AVR32_FEATURE_DSP	(1 << 1)
-#define AVR32_FEATURE_SIMD	(1 << 2)
-#define AVR32_FEATURE_OCD	(1 << 3)
-#define AVR32_FEATURE_PCTR	(1 << 4)
-#define AVR32_FEATURE_JAVA	(1 << 5)
-#define AVR32_FEATURE_FPU	(1 << 6)
-
-struct avr32_cpuinfo {
-	struct clk *clk;
-	unsigned long loops_per_jiffy;
-	enum arch_type arch_type;
-	enum cpu_type cpu_type;
-	unsigned short arch_revision;
-	unsigned short cpu_revision;
-	enum tlb_config tlb_config;
-	unsigned long features;
-	u32 device_id;
-
-	struct cache_info icache;
-	struct cache_info dcache;
-};
-
-static inline unsigned int avr32_get_manufacturer_id(struct avr32_cpuinfo *cpu)
-{
-	return (cpu->device_id >> 1) & 0x7f;
-}
-static inline unsigned int avr32_get_product_number(struct avr32_cpuinfo *cpu)
-{
-	return (cpu->device_id >> 12) & 0xffff;
-}
-static inline unsigned int avr32_get_chip_revision(struct avr32_cpuinfo *cpu)
-{
-	return (cpu->device_id >> 28) & 0x0f;
-}
-
-extern struct avr32_cpuinfo boot_cpu_data;
-
-/* No SMP support so far */
-#define current_cpu_data boot_cpu_data
-
-/* This decides where the kernel will search for a free chunk of vm
- * space during mmap's
- */
-#define TASK_UNMAPPED_BASE	(PAGE_ALIGN(TASK_SIZE / 3))
-
-#define cpu_relax()		barrier()
-#define cpu_sync_pipeline()	asm volatile("sub pc, -2" : : : "memory")
-
-struct cpu_context {
-	unsigned long sr;
-	unsigned long pc;
-	unsigned long ksp;	/* Kernel stack pointer */
-	unsigned long r7;
-	unsigned long r6;
-	unsigned long r5;
-	unsigned long r4;
-	unsigned long r3;
-	unsigned long r2;
-	unsigned long r1;
-	unsigned long r0;
-};
-
-/* This struct contains the CPU context as stored by switch_to() */
-struct thread_struct {
-	struct cpu_context cpu_context;
-	unsigned long single_step_addr;
-	u16 single_step_insn;
-};
-
-#define INIT_THREAD {						\
-	.cpu_context = {					\
-		.ksp = sizeof(init_stack) + (long)&init_stack,	\
-	},							\
-}
-
-/*
- * Do necessary setup to start up a newly executed thread.
- */
-#define start_thread(regs, new_pc, new_sp)	 \
-	do {					 \
-		memset(regs, 0, sizeof(*regs));	 \
-		regs->sr = MODE_USER;		 \
-		regs->pc = new_pc & ~1;		 \
-		regs->sp = new_sp;		 \
-	} while(0)
-
-struct task_struct;
-
-/* Free all resources held by a thread */
-extern void release_thread(struct task_struct *);
-
-/* Return saved PC of a blocked thread */
-#define thread_saved_pc(tsk)    ((tsk)->thread.cpu_context.pc)
-
-struct pt_regs;
-extern unsigned long get_wchan(struct task_struct *p);
-extern void show_regs_log_lvl(struct pt_regs *regs, const char *log_lvl);
-extern void show_stack_log_lvl(struct task_struct *tsk, unsigned long sp,
-			       struct pt_regs *regs, const char *log_lvl);
-
-#define task_pt_regs(p) \
-	((struct pt_regs *)(THREAD_SIZE + task_stack_page(p)) - 1)
-
-#define KSTK_EIP(tsk)	((tsk)->thread.cpu_context.pc)
-#define KSTK_ESP(tsk)	((tsk)->thread.cpu_context.ksp)
-
-#define ARCH_HAS_PREFETCH
-
-static inline void prefetch(const void *x)
-{
-	const char *c = x;
-	asm volatile("pref %0" : : "r"(c));
-}
-#define PREFETCH_STRIDE	L1_CACHE_BYTES
-
-#endif /* __ASSEMBLY__ */
-
-#endif /* __ASM_AVR32_PROCESSOR_H */