CRIS: Drop support for the CRIS port

The port was added back in 2000 so it's no longer even a good source
of inspiration for newer ports (if it ever was)

The last SoC (ARTPEC-3) with a CRIS main CPU was launched in 2008.

Coupled with time and working developer board hardware being
in low supply, it's time to drop the port from Linux.

So long and thanks for all the fish!

Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 0 insertions, 163 deletions

diff --git a/arch/cris/arch-v32/mm/init.c b/arch/cris/arch-v32/mm/init.c
deleted file mode 100644
index 784876afa001..000000000000
--- a/arch/cris/arch-v32/mm/init.c
+++ /dev/null
@@ -1,163 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Set up paging and the MMU.
- *
- * Copyright (C) 2000-2003, Axis Communications AB.
- *
- * Authors:   Bjorn Wesen <bjornw@axis.com>
- *            Tobias Anderberg <tobiasa@axis.com>, CRISv32 port.
- */
-#include <linux/mmzone.h>
-#include <linux/init.h>
-#include <linux/bootmem.h>
-#include <linux/mm.h>
-#include <asm/pgtable.h>
-#include <asm/page.h>
-#include <asm/types.h>
-#include <asm/mmu.h>
-#include <asm/io.h>
-#include <asm/mmu_context.h>
-#include <arch/hwregs/asm/mmu_defs_asm.h>
-#include <arch/hwregs/supp_reg.h>
-
-extern void tlb_init(void);
-
-/*
- * The kernel is already mapped with linear mapping at kseg_c so there's no
- * need to map it with a page table. However, head.S also temporarily mapped it
- * at kseg_4 thus the ksegs are set up again. Also clear the TLB and do various
- * other paging stuff.
- */
-void __init cris_mmu_init(void)
-{
-	unsigned long mmu_config;
-	unsigned long mmu_kbase_hi;
-	unsigned long mmu_kbase_lo;
-	unsigned short mmu_page_id;
-
-	/*
-	 * Make sure the current pgd table points to something sane, even if it
-	 * is most probably not used until the next switch_mm.
-	 */
-	per_cpu(current_pgd, smp_processor_id()) = init_mm.pgd;
-
-	/* Initialise the TLB. Function found in tlb.c. */
-	tlb_init();
-
-	/*
-	 * Enable exceptions and initialize the kernel segments.
-	 * See head.S for differences between ARTPEC-3 and ETRAX FS.
-	 */
-	mmu_config = ( REG_STATE(mmu, rw_mm_cfg, we, on)        |
-		       REG_STATE(mmu, rw_mm_cfg, acc, on)       |
-		       REG_STATE(mmu, rw_mm_cfg, ex, on)        |
-		       REG_STATE(mmu, rw_mm_cfg, inv, on)       |
-#ifdef CONFIG_CRIS_MACH_ARTPEC3
-		       REG_STATE(mmu, rw_mm_cfg, seg_f, page)   |
-		       REG_STATE(mmu, rw_mm_cfg, seg_e, page)   |
-		       REG_STATE(mmu, rw_mm_cfg, seg_d, linear) |
-#else
-		       REG_STATE(mmu, rw_mm_cfg, seg_f, linear) |
-		       REG_STATE(mmu, rw_mm_cfg, seg_e, linear) |
-		       REG_STATE(mmu, rw_mm_cfg, seg_d, page)   |
-#endif
-		       REG_STATE(mmu, rw_mm_cfg, seg_c, linear) |
-		       REG_STATE(mmu, rw_mm_cfg, seg_b, linear) |
-                       REG_STATE(mmu, rw_mm_cfg, seg_a, page)   |
-		       REG_STATE(mmu, rw_mm_cfg, seg_9, page)   |
-		       REG_STATE(mmu, rw_mm_cfg, seg_8, page)   |
-		       REG_STATE(mmu, rw_mm_cfg, seg_7, page)   |
-		       REG_STATE(mmu, rw_mm_cfg, seg_6, page)   |
-		       REG_STATE(mmu, rw_mm_cfg, seg_5, page)   |
-		       REG_STATE(mmu, rw_mm_cfg, seg_4, page)   |
-		       REG_STATE(mmu, rw_mm_cfg, seg_3, page)   |
-		       REG_STATE(mmu, rw_mm_cfg, seg_2, page)   |
-		       REG_STATE(mmu, rw_mm_cfg, seg_1, page)   |
-		       REG_STATE(mmu, rw_mm_cfg, seg_0, page));
-
-	/* See head.S for differences between ARTPEC-3 and ETRAX FS. */
-	mmu_kbase_hi = ( REG_FIELD(mmu, rw_mm_kbase_hi, base_f, 0x0) |
-#ifdef CONFIG_CRIS_MACH_ARTPEC3
-			 REG_FIELD(mmu, rw_mm_kbase_hi, base_e, 0x0) |
-			 REG_FIELD(mmu, rw_mm_kbase_hi, base_d, 0x5) |
-#else
-			 REG_FIELD(mmu, rw_mm_kbase_hi, base_e, 0x8) |
-			 REG_FIELD(mmu, rw_mm_kbase_hi, base_d, 0x0) |
-#endif
-                         REG_FIELD(mmu, rw_mm_kbase_hi, base_c, 0x4) |
-			 REG_FIELD(mmu, rw_mm_kbase_hi, base_b, 0xb) |
-			 REG_FIELD(mmu, rw_mm_kbase_hi, base_a, 0x0) |
-			 REG_FIELD(mmu, rw_mm_kbase_hi, base_9, 0x0) |
-			 REG_FIELD(mmu, rw_mm_kbase_hi, base_8, 0x0));
-
-	mmu_kbase_lo = ( REG_FIELD(mmu, rw_mm_kbase_lo, base_7, 0x0) |
-			 REG_FIELD(mmu, rw_mm_kbase_lo, base_6, 0x0) |
-			 REG_FIELD(mmu, rw_mm_kbase_lo, base_5, 0x0) |
-			 REG_FIELD(mmu, rw_mm_kbase_lo, base_4, 0x0) |
-			 REG_FIELD(mmu, rw_mm_kbase_lo, base_3, 0x0) |
-			 REG_FIELD(mmu, rw_mm_kbase_lo, base_2, 0x0) |
-			 REG_FIELD(mmu, rw_mm_kbase_lo, base_1, 0x0) |
-			 REG_FIELD(mmu, rw_mm_kbase_lo, base_0, 0x0));
-
-	mmu_page_id = REG_FIELD(mmu, rw_mm_tlb_hi, pid, 0);
-
-	/* Update the instruction MMU. */
-	SUPP_BANK_SEL(BANK_IM);
-	SUPP_REG_WR(RW_MM_CFG, mmu_config);
-	SUPP_REG_WR(RW_MM_KBASE_HI, mmu_kbase_hi);
-	SUPP_REG_WR(RW_MM_KBASE_LO, mmu_kbase_lo);
-	SUPP_REG_WR(RW_MM_TLB_HI, mmu_page_id);
-
-	/* Update the data MMU. */
-	SUPP_BANK_SEL(BANK_DM);
-	SUPP_REG_WR(RW_MM_CFG, mmu_config);
-	SUPP_REG_WR(RW_MM_KBASE_HI, mmu_kbase_hi);
-	SUPP_REG_WR(RW_MM_KBASE_LO, mmu_kbase_lo);
-	SUPP_REG_WR(RW_MM_TLB_HI, mmu_page_id);
-
-	SPEC_REG_WR(SPEC_REG_PID, 0);
-
-	/*
-	 * The MMU has been enabled ever since head.S but just to make it
-	 * totally obvious enable it here as well.
-	 */
-	SUPP_BANK_SEL(BANK_GC);
-	SUPP_REG_WR(RW_GC_CFG, 0xf); /* IMMU, DMMU, ICache, DCache on */
-}
-
-void __init paging_init(void)
-{
-	int i;
-	unsigned long zones_size[MAX_NR_ZONES];
-
-	printk("Setting up paging and the MMU.\n");
-
-	/* Clear out the init_mm.pgd that will contain the kernel's mappings. */
-	for(i = 0; i < PTRS_PER_PGD; i++)
-		swapper_pg_dir[i] = __pgd(0);
-
-	cris_mmu_init();
-
-	/*
-	 * Initialize the bad page table and bad page to point to a couple of
-	 * allocated pages.
-	 */
-	empty_zero_page = (unsigned long) alloc_bootmem_pages(PAGE_SIZE);
-	memset((void *) empty_zero_page, 0, PAGE_SIZE);
-
-	/* All pages are DMA'able in Etrax, so put all in the DMA'able zone. */
-	zones_size[0] = ((unsigned long) high_memory - PAGE_OFFSET) >> PAGE_SHIFT;
-
-	for (i = 1; i < MAX_NR_ZONES; i++)
-		zones_size[i] = 0;
-
-	/*
-	 * Use free_area_init_node instead of free_area_init, because it is
-	 * designed for systems where the DRAM starts at an address
-	 * substantially higher than 0, like us (we start at PAGE_OFFSET). This
-	 * saves space in the mem_map page array.
-	 */
-	free_area_init_node(0, zones_size, PAGE_OFFSET >> PAGE_SHIFT, 0);
-
-	mem_map = contig_page_data.node_mem_map;
-}