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-rw-r--r--arch/cris/arch-v32/mm/init.c163
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 784876a..0000000
--- 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;
-}
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