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-rw-r--r--arch/nds32/mm/init.c263
1 files changed, 0 insertions, 263 deletions
diff --git a/arch/nds32/mm/init.c b/arch/nds32/mm/init.c
deleted file mode 100644
index f63f839738c4..000000000000
--- a/arch/nds32/mm/init.c
+++ /dev/null
@@ -1,263 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 1995-2005 Russell King
-// Copyright (C) 2012 ARM Ltd.
-// Copyright (C) 2013-2017 Andes Technology Corporation
-
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/swap.h>
-#include <linux/init.h>
-#include <linux/memblock.h>
-#include <linux/mman.h>
-#include <linux/nodemask.h>
-#include <linux/initrd.h>
-#include <linux/highmem.h>
-
-#include <asm/sections.h>
-#include <asm/setup.h>
-#include <asm/tlb.h>
-#include <asm/page.h>
-
-DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
-DEFINE_SPINLOCK(anon_alias_lock);
-extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
-
-/*
- * empty_zero_page is a special page that is used for
- * zero-initialized data and COW.
- */
-struct page *empty_zero_page;
-EXPORT_SYMBOL(empty_zero_page);
-
-static void __init zone_sizes_init(void)
-{
- unsigned long max_zone_pfn[MAX_NR_ZONES] = { 0 };
-
- max_zone_pfn[ZONE_NORMAL] = max_low_pfn;
-#ifdef CONFIG_HIGHMEM
- max_zone_pfn[ZONE_HIGHMEM] = max_pfn;
-#endif
- free_area_init(max_zone_pfn);
-
-}
-
-/*
- * Map all physical memory under high_memory into kernel's address space.
- *
- * This is explicitly coded for two-level page tables, so if you need
- * something else then this needs to change.
- */
-static void __init map_ram(void)
-{
- unsigned long v, p, e;
- pgd_t *pge;
- p4d_t *p4e;
- pud_t *pue;
- pmd_t *pme;
- pte_t *pte;
- /* These mark extents of read-only kernel pages...
- * ...from vmlinux.lds.S
- */
-
- p = (u32) memblock_start_of_DRAM() & PAGE_MASK;
- e = min((u32) memblock_end_of_DRAM(), (u32) __pa(high_memory));
-
- v = (u32) __va(p);
- pge = pgd_offset_k(v);
-
- while (p < e) {
- int j;
- p4e = p4d_offset(pge, v);
- pue = pud_offset(p4e, v);
- pme = pmd_offset(pue, v);
-
- if ((u32) pue != (u32) pge || (u32) pme != (u32) pge) {
- panic("%s: Kernel hardcoded for "
- "two-level page tables", __func__);
- }
-
- /* Alloc one page for holding PTE's... */
- pte = memblock_alloc(PAGE_SIZE, PAGE_SIZE);
- if (!pte)
- panic("%s: Failed to allocate %lu bytes align=0x%lx\n",
- __func__, PAGE_SIZE, PAGE_SIZE);
- set_pmd(pme, __pmd(__pa(pte) + _PAGE_KERNEL_TABLE));
-
- /* Fill the newly allocated page with PTE'S */
- for (j = 0; p < e && j < PTRS_PER_PTE;
- v += PAGE_SIZE, p += PAGE_SIZE, j++, pte++) {
- /* Create mapping between p and v. */
- /* TODO: more fine grant for page access permission */
- set_pte(pte, __pte(p + pgprot_val(PAGE_KERNEL)));
- }
-
- pge++;
- }
-}
-static pmd_t *fixmap_pmd_p;
-static void __init fixedrange_init(void)
-{
- unsigned long vaddr;
- pmd_t *pmd;
-#ifdef CONFIG_HIGHMEM
- pte_t *pte;
-#endif /* CONFIG_HIGHMEM */
-
- /*
- * Fixed mappings:
- */
- vaddr = __fix_to_virt(__end_of_fixed_addresses - 1);
- pmd = pmd_off_k(vaddr);
- fixmap_pmd_p = memblock_alloc(PAGE_SIZE, PAGE_SIZE);
- if (!fixmap_pmd_p)
- panic("%s: Failed to allocate %lu bytes align=0x%lx\n",
- __func__, PAGE_SIZE, PAGE_SIZE);
- set_pmd(pmd, __pmd(__pa(fixmap_pmd_p) + _PAGE_KERNEL_TABLE));
-
-#ifdef CONFIG_HIGHMEM
- /*
- * Permanent kmaps:
- */
- vaddr = PKMAP_BASE;
-
- pmd = pmd_off_k(vaddr);
- pte = memblock_alloc(PAGE_SIZE, PAGE_SIZE);
- if (!pte)
- panic("%s: Failed to allocate %lu bytes align=0x%lx\n",
- __func__, PAGE_SIZE, PAGE_SIZE);
- set_pmd(pmd, __pmd(__pa(pte) + _PAGE_KERNEL_TABLE));
- pkmap_page_table = pte;
-#endif /* CONFIG_HIGHMEM */
-}
-
-/*
- * paging_init() sets up the page tables, initialises the zone memory
- * maps, and sets up the zero page, bad page and bad page tables.
- */
-void __init paging_init(void)
-{
- int i;
- void *zero_page;
-
- pr_info("Setting up paging and PTEs.\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(1);
-
- map_ram();
-
- fixedrange_init();
-
- /* allocate space for empty_zero_page */
- zero_page = memblock_alloc(PAGE_SIZE, PAGE_SIZE);
- if (!zero_page)
- panic("%s: Failed to allocate %lu bytes align=0x%lx\n",
- __func__, PAGE_SIZE, PAGE_SIZE);
- zone_sizes_init();
-
- empty_zero_page = virt_to_page(zero_page);
- flush_dcache_page(empty_zero_page);
-}
-
-static inline void __init free_highmem(void)
-{
-#ifdef CONFIG_HIGHMEM
- unsigned long pfn;
- for (pfn = PFN_UP(__pa(high_memory)); pfn < max_pfn; pfn++) {
- phys_addr_t paddr = (phys_addr_t) pfn << PAGE_SHIFT;
- if (!memblock_is_reserved(paddr))
- free_highmem_page(pfn_to_page(pfn));
- }
-#endif
-}
-
-static void __init set_max_mapnr_init(void)
-{
- max_mapnr = max_pfn;
-}
-
-/*
- * mem_init() marks the free areas in the mem_map and tells us how much
- * memory is free. This is done after various parts of the system have
- * claimed their memory after the kernel image.
- */
-void __init mem_init(void)
-{
- phys_addr_t memory_start = memblock_start_of_DRAM();
- BUG_ON(!mem_map);
- set_max_mapnr_init();
-
- free_highmem();
-
- /* this will put all low memory onto the freelists */
- memblock_free_all();
-
- pr_info("virtual kernel memory layout:\n"
- " fixmap : 0x%08lx - 0x%08lx (%4ld kB)\n"
-#ifdef CONFIG_HIGHMEM
- " pkmap : 0x%08lx - 0x%08lx (%4ld kB)\n"
-#endif
- " consist : 0x%08lx - 0x%08lx (%4ld MB)\n"
- " vmalloc : 0x%08lx - 0x%08lx (%4ld MB)\n"
- " lowmem : 0x%08lx - 0x%08lx (%4ld MB)\n"
- " .init : 0x%08lx - 0x%08lx (%4ld kB)\n"
- " .data : 0x%08lx - 0x%08lx (%4ld kB)\n"
- " .text : 0x%08lx - 0x%08lx (%4ld kB)\n",
- FIXADDR_START, FIXADDR_TOP, (FIXADDR_TOP - FIXADDR_START) >> 10,
-#ifdef CONFIG_HIGHMEM
- PKMAP_BASE, PKMAP_BASE + LAST_PKMAP * PAGE_SIZE,
- (LAST_PKMAP * PAGE_SIZE) >> 10,
-#endif
- CONSISTENT_BASE, CONSISTENT_END,
- ((CONSISTENT_END) - (CONSISTENT_BASE)) >> 20, VMALLOC_START,
- (unsigned long)VMALLOC_END, (VMALLOC_END - VMALLOC_START) >> 20,
- (unsigned long)__va(memory_start), (unsigned long)high_memory,
- ((unsigned long)high_memory -
- (unsigned long)__va(memory_start)) >> 20,
- (unsigned long)&__init_begin, (unsigned long)&__init_end,
- ((unsigned long)&__init_end -
- (unsigned long)&__init_begin) >> 10, (unsigned long)&_etext,
- (unsigned long)&_edata,
- ((unsigned long)&_edata - (unsigned long)&_etext) >> 10,
- (unsigned long)&_text, (unsigned long)&_etext,
- ((unsigned long)&_etext - (unsigned long)&_text) >> 10);
-
- /*
- * Check boundaries twice: Some fundamental inconsistencies can
- * be detected at build time already.
- */
-#ifdef CONFIG_HIGHMEM
- BUILD_BUG_ON(PKMAP_BASE + LAST_PKMAP * PAGE_SIZE > FIXADDR_START);
- BUILD_BUG_ON((CONSISTENT_END) > PKMAP_BASE);
-#endif
- BUILD_BUG_ON(VMALLOC_END > CONSISTENT_BASE);
- BUILD_BUG_ON(VMALLOC_START >= VMALLOC_END);
-
-#ifdef CONFIG_HIGHMEM
- BUG_ON(PKMAP_BASE + LAST_PKMAP * PAGE_SIZE > FIXADDR_START);
- BUG_ON(CONSISTENT_END > PKMAP_BASE);
-#endif
- BUG_ON(VMALLOC_END > CONSISTENT_BASE);
- BUG_ON(VMALLOC_START >= VMALLOC_END);
- BUG_ON((unsigned long)high_memory > VMALLOC_START);
-
- return;
-}
-
-void __set_fixmap(enum fixed_addresses idx,
- phys_addr_t phys, pgprot_t flags)
-{
- unsigned long addr = __fix_to_virt(idx);
- pte_t *pte;
-
- BUG_ON(idx <= FIX_HOLE || idx >= __end_of_fixed_addresses);
-
- pte = (pte_t *)&fixmap_pmd_p[pte_index(addr)];
-
- if (pgprot_val(flags)) {
- set_pte(pte, pfn_pte(phys >> PAGE_SHIFT, flags));
- } else {
- pte_clear(&init_mm, addr, pte);
- flush_tlb_kernel_range(addr, addr + PAGE_SIZE);
- }
-}