mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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aca52c3983
All architecures use memblock for early memory management. There is no need for the CONFIG_HAVE_MEMBLOCK configuration option. [rppt@linux.vnet.ibm.com: of/fdt: fixup #ifdefs] Link: http://lkml.kernel.org/r/20180919103457.GA20545@rapoport-lnx [rppt@linux.vnet.ibm.com: csky: fixups after bootmem removal] Link: http://lkml.kernel.org/r/20180926112744.GC4628@rapoport-lnx [rppt@linux.vnet.ibm.com: remove stale #else and the code it protects] Link: http://lkml.kernel.org/r/1538067825-24835-1-git-send-email-rppt@linux.vnet.ibm.com Link: http://lkml.kernel.org/r/1536927045-23536-4-git-send-email-rppt@linux.vnet.ibm.com Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com> Acked-by: Michal Hocko <mhocko@suse.com> Tested-by: Jonathan Cameron <jonathan.cameron@huawei.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Chris Zankel <chris@zankel.net> Cc: "David S. Miller" <davem@davemloft.net> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Greentime Hu <green.hu@gmail.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Guan Xuetao <gxt@pku.edu.cn> Cc: Ingo Molnar <mingo@redhat.com> Cc: "James E.J. Bottomley" <jejb@parisc-linux.org> Cc: Jonas Bonn <jonas@southpole.se> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Ley Foon Tan <lftan@altera.com> Cc: Mark Salter <msalter@redhat.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Matt Turner <mattst88@gmail.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michal Simek <monstr@monstr.eu> Cc: Palmer Dabbelt <palmer@sifive.com> Cc: Paul Burton <paul.burton@mips.com> Cc: Richard Kuo <rkuo@codeaurora.org> Cc: Richard Weinberger <richard@nod.at> Cc: Rich Felker <dalias@libc.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Serge Semin <fancer.lancer@gmail.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tony Luck <tony.luck@intel.com> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
121 lines
2.7 KiB
C
121 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
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#include <linux/bug.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/signal.h>
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#include <linux/sched.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/string.h>
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#include <linux/types.h>
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#include <linux/pagemap.h>
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#include <linux/ptrace.h>
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#include <linux/mman.h>
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#include <linux/mm.h>
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#include <linux/highmem.h>
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#include <linux/memblock.h>
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#include <linux/swap.h>
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#include <linux/proc_fs.h>
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#include <linux/pfn.h>
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#include <asm/setup.h>
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#include <asm/cachectl.h>
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#include <asm/dma.h>
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#include <asm/pgtable.h>
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#include <asm/pgalloc.h>
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#include <asm/mmu_context.h>
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#include <asm/sections.h>
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#include <asm/tlb.h>
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pgd_t swapper_pg_dir[PTRS_PER_PGD] __page_aligned_bss;
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pte_t invalid_pte_table[PTRS_PER_PTE] __page_aligned_bss;
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unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)]
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__page_aligned_bss;
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EXPORT_SYMBOL(empty_zero_page);
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void __init mem_init(void)
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{
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#ifdef CONFIG_HIGHMEM
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unsigned long tmp;
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max_mapnr = highend_pfn;
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#else
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max_mapnr = max_low_pfn;
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#endif
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high_memory = (void *) __va(max_low_pfn << PAGE_SHIFT);
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memblock_free_all();
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#ifdef CONFIG_HIGHMEM
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for (tmp = highstart_pfn; tmp < highend_pfn; tmp++) {
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struct page *page = pfn_to_page(tmp);
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/* FIXME not sure about */
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if (!memblock_is_reserved(tmp << PAGE_SHIFT))
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free_highmem_page(page);
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}
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#endif
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mem_init_print_info(NULL);
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}
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#ifdef CONFIG_BLK_DEV_INITRD
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void free_initrd_mem(unsigned long start, unsigned long end)
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{
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if (start < end)
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pr_info("Freeing initrd memory: %ldk freed\n",
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(end - start) >> 10);
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for (; start < end; start += PAGE_SIZE) {
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ClearPageReserved(virt_to_page(start));
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init_page_count(virt_to_page(start));
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free_page(start);
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totalram_pages++;
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}
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}
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#endif
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extern char __init_begin[], __init_end[];
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void free_initmem(void)
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{
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unsigned long addr;
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addr = (unsigned long) &__init_begin;
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while (addr < (unsigned long) &__init_end) {
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ClearPageReserved(virt_to_page(addr));
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init_page_count(virt_to_page(addr));
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free_page(addr);
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totalram_pages++;
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addr += PAGE_SIZE;
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}
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pr_info("Freeing unused kernel memory: %dk freed\n",
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((unsigned int)&__init_end - (unsigned int)&__init_begin) >> 10);
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}
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void pgd_init(unsigned long *p)
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{
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int i;
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for (i = 0; i < PTRS_PER_PGD; i++)
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p[i] = __pa(invalid_pte_table);
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}
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void __init pre_mmu_init(void)
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{
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/*
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* Setup page-table and enable TLB-hardrefill
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*/
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flush_tlb_all();
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pgd_init((unsigned long *)swapper_pg_dir);
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TLBMISS_HANDLER_SETUP_PGD(swapper_pg_dir);
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TLBMISS_HANDLER_SETUP_PGD_KERNEL(swapper_pg_dir);
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asid_cache(smp_processor_id()) = ASID_FIRST_VERSION;
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/* Setup page mask to 4k */
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write_mmu_pagemask(0);
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}
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