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, 125 deletions

diff --git a/arch/avr32/mm/init.c b/arch/avr32/mm/init.c
deleted file mode 100644
index def5391d927a..000000000000
--- a/arch/avr32/mm/init.c
+++ /dev/null
@@ -1,125 +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.
- */
-
-#include <linux/kernel.h>
-#include <linux/gfp.h>
-#include <linux/mm.h>
-#include <linux/swap.h>
-#include <linux/init.h>
-#include <linux/mmzone.h>
-#include <linux/module.h>
-#include <linux/bootmem.h>
-#include <linux/pagemap.h>
-#include <linux/nodemask.h>
-
-#include <asm/page.h>
-#include <asm/mmu_context.h>
-#include <asm/tlb.h>
-#include <asm/io.h>
-#include <asm/dma.h>
-#include <asm/setup.h>
-#include <asm/sections.h>
-
-pgd_t swapper_pg_dir[PTRS_PER_PGD] __page_aligned_data;
-
-struct page *empty_zero_page;
-EXPORT_SYMBOL(empty_zero_page);
-
-/*
- * Cache of MMU context last used.
- */
-unsigned long mmu_context_cache = NO_CONTEXT;
-
-/*
- * paging_init() sets up the page tables
- *
- * This routine also unmaps the page at virtual kernel address 0, so
- * that we can trap those pesky NULL-reference errors in the kernel.
- */
-void __init paging_init(void)
-{
-	extern unsigned long _evba;
-	void *zero_page;
-	int nid;
-
-	/*
-	 * Make sure we can handle exceptions before enabling
-	 * paging. Not that we should ever _get_ any exceptions this
-	 * early, but you never know...
-	 */
-	printk("Exception vectors start at %p\n", &_evba);
-	sysreg_write(EVBA, (unsigned long)&_evba);
-
-	/*
-	 * Since we are ready to handle exceptions now, we should let
-	 * the CPU generate them...
-	 */
-	__asm__ __volatile__ ("csrf %0" : : "i"(SR_EM_BIT));
-
-	/*
-	 * Allocate the zero page. The allocator will panic if it
-	 * can't satisfy the request, so no need to check.
-	 */
-	zero_page = alloc_bootmem_low_pages_node(NODE_DATA(0),
-						 PAGE_SIZE);
-
-	sysreg_write(PTBR, (unsigned long)swapper_pg_dir);
-	enable_mmu();
-	printk ("CPU: Paging enabled\n");
-
-	for_each_online_node(nid) {
-		pg_data_t *pgdat = NODE_DATA(nid);
-		unsigned long zones_size[MAX_NR_ZONES];
-		unsigned long low, start_pfn;
-
-		start_pfn = pgdat->bdata->node_min_pfn;
-		low = pgdat->bdata->node_low_pfn;
-
-		memset(zones_size, 0, sizeof(zones_size));
-		zones_size[ZONE_NORMAL] = low - start_pfn;
-
-		printk("Node %u: start_pfn = 0x%lx, low = 0x%lx\n",
-		       nid, start_pfn, low);
-
-		free_area_init_node(nid, zones_size, start_pfn, NULL);
-
-		printk("Node %u: mem_map starts at %p\n",
-		       pgdat->node_id, pgdat->node_mem_map);
-	}
-
-	mem_map = NODE_DATA(0)->node_mem_map;
-
-	empty_zero_page = virt_to_page(zero_page);
-	flush_dcache_page(empty_zero_page);
-}
-
-void __init mem_init(void)
-{
-	pg_data_t *pgdat;
-
-	high_memory = NULL;
-	for_each_online_pgdat(pgdat)
-		high_memory = max_t(void *, high_memory,
-				    __va(pgdat_end_pfn(pgdat) << PAGE_SHIFT));
-
-	set_max_mapnr(MAP_NR(high_memory));
-	free_all_bootmem();
-	mem_init_print_info(NULL);
-}
-
-void free_initmem(void)
-{
-	free_initmem_default(-1);
-}
-
-#ifdef CONFIG_BLK_DEV_INITRD
-void free_initrd_mem(unsigned long start, unsigned long end)
-{
-	free_reserved_area((void *)start, (void *)end, -1, "initrd");
-}
-#endif