arch: remove blackfin port

The Analog Devices Blackfin port was added in 2007 and was rather
active for a while, but all work on it has come to a standstill
over time, as Analog have changed their product line-up.

Aaron Wu confirmed that the architecture port is no longer relevant,
and multiple people suggested removing blackfin independently because
of some of its oddities like a non-working SMP port, and the amount of
duplication between the chip variants, which cause extra work when
doing cross-architecture changes.

Link: https://docs.blackfin.uclinux.org/
Acked-by: Aaron Wu <Aaron.Wu@analog.com>
Acked-by: Bryan Wu <cooloney@gmail.com>
Cc: Steven Miao <realmz6@gmail.com>
Cc: Mike Frysinger <vapier@chromium.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 0 insertions, 122 deletions

diff --git a/arch/blackfin/mm/init.c b/arch/blackfin/mm/init.c
deleted file mode 100644
index b59cd7c3261a..000000000000
--- a/arch/blackfin/mm/init.c
+++ /dev/null
@@ -1,122 +0,0 @@
-/*
- * Copyright 2004-2009 Analog Devices Inc.
- *
- * Licensed under the GPL-2 or later.
- */
-
-#include <linux/gfp.h>
-#include <linux/swap.h>
-#include <linux/bootmem.h>
-#include <linux/uaccess.h>
-#include <linux/export.h>
-#include <asm/bfin-global.h>
-#include <asm/pda.h>
-#include <asm/cplbinit.h>
-#include <asm/early_printk.h>
-#include "blackfin_sram.h"
-
-/*
- * ZERO_PAGE is a special page that is used for zero-initialized data and COW.
- * Let the bss do its zero-init magic so we don't have to do it ourselves.
- */
-char empty_zero_page[PAGE_SIZE] __attribute__((aligned(PAGE_SIZE)));
-EXPORT_SYMBOL(empty_zero_page);
-
-#ifndef CONFIG_EXCEPTION_L1_SCRATCH
-#if defined CONFIG_SYSCALL_TAB_L1
-__attribute__((l1_data))
-#endif
-static unsigned long exception_stack[NR_CPUS][1024];
-#endif
-
-struct blackfin_pda cpu_pda[NR_CPUS];
-EXPORT_SYMBOL(cpu_pda);
-
-/*
- * paging_init() continues the virtual memory environment setup which
- * was begun by the code in arch/head.S.
- * The parameters are pointers to where to stick the starting and ending
- * addresses  of available kernel virtual memory.
- */
-void __init paging_init(void)
-{
-	/*
-	 * make sure start_mem is page aligned, otherwise bootmem and
-	 * page_alloc get different views of the world
-	 */
-	unsigned long end_mem = memory_end & PAGE_MASK;
-
-	unsigned long zones_size[MAX_NR_ZONES] = {
-		[0] = 0,
-		[ZONE_DMA] = (end_mem - CONFIG_PHY_RAM_BASE_ADDRESS) >> PAGE_SHIFT,
-		[ZONE_NORMAL] = 0,
-#ifdef CONFIG_HIGHMEM
-		[ZONE_HIGHMEM] = 0,
-#endif
-	};
-
-	/* Set up SFC/DFC registers (user data space) */
-	set_fs(KERNEL_DS);
-
-	pr_debug("free_area_init -> start_mem is %#lx virtual_end is %#lx\n",
-	        PAGE_ALIGN(memory_start), end_mem);
-	free_area_init_node(0, zones_size,
-		CONFIG_PHY_RAM_BASE_ADDRESS >> PAGE_SHIFT, NULL);
-}
-
-asmlinkage void __init init_pda(void)
-{
-	unsigned int cpu = raw_smp_processor_id();
-
-	early_shadow_stamp();
-
-	/* Initialize the PDA fields holding references to other parts
-	   of the memory. The content of such memory is still
-	   undefined at the time of the call, we are only setting up
-	   valid pointers to it. */
-	memset(&cpu_pda[cpu], 0, sizeof(cpu_pda[cpu]));
-
-#ifdef CONFIG_EXCEPTION_L1_SCRATCH
-	cpu_pda[cpu].ex_stack = (unsigned long *)(L1_SCRATCH_START + \
-					L1_SCRATCH_LENGTH);
-#else
-	cpu_pda[cpu].ex_stack = exception_stack[cpu + 1];
-#endif
-
-#ifdef CONFIG_SMP
-	cpu_pda[cpu].imask = 0x1f;
-#endif
-}
-
-void __init mem_init(void)
-{
-	char buf[64];
-
-	high_memory = (void *)(memory_end & PAGE_MASK);
-	max_mapnr = MAP_NR(high_memory);
-	printk(KERN_DEBUG "Kernel managed physical pages: %lu\n", max_mapnr);
-
-	/* This will put all low memory onto the freelists. */
-	free_all_bootmem();
-
-	snprintf(buf, sizeof(buf) - 1, "%uK DMA", DMA_UNCACHED_REGION >> 10);
-	mem_init_print_info(buf);
-}
-
-#ifdef CONFIG_BLK_DEV_INITRD
-void __init free_initrd_mem(unsigned long start, unsigned long end)
-{
-#ifndef CONFIG_MPU
-	free_reserved_area((void *)start, (void *)end, -1, "initrd");
-#endif
-}
-#endif
-
-void __ref free_initmem(void)
-{
-#if defined CONFIG_RAMKERNEL && !defined CONFIG_MPU
-	free_initmem_default(-1);
-	if (memory_start == (unsigned long)(&__init_end))
-		memory_start = (unsigned long)(&__init_begin);
-#endif
-}