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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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c910951a85
All architectures use pXd_index() to get an entry in the page table page corresponding to a virtual address. Align csky with other architectures. Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Cain <bcain@codeaurora.org> 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 Ungerer <gerg@linux-m68k.org> Cc: Guan Xuetao <gxt@pku.edu.cn> Cc: Guo Ren <guoren@kernel.org> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Helge Deller <deller@gmx.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Ley Foon Tan <ley.foon.tan@intel.com> Cc: Mark Salter <msalter@redhat.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Matt Turner <mattst88@gmail.com> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michal Simek <monstr@monstr.eu> Cc: Nick Hu <nickhu@andestech.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Richard Weinberger <richard@nod.at> Cc: Rich Felker <dalias@libc.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Stafford Horne <shorne@gmail.com> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tony Luck <tony.luck@intel.com> Cc: Vincent Chen <deanbo422@gmail.com> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Will Deacon <will@kernel.org> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Link: http://lkml.kernel.org/r/20200514170327.31389-5-rppt@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
112 lines
2.3 KiB
C
112 lines
2.3 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/module.h>
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#include <linux/highmem.h>
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#include <linux/smp.h>
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#include <linux/memblock.h>
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#include <asm/fixmap.h>
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#include <asm/tlbflush.h>
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#include <asm/cacheflush.h>
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static pte_t *kmap_pte;
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unsigned long highstart_pfn, highend_pfn;
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void kmap_flush_tlb(unsigned long addr)
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{
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flush_tlb_one(addr);
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}
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EXPORT_SYMBOL(kmap_flush_tlb);
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EXPORT_SYMBOL(kmap);
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void *kmap_atomic_high_prot(struct page *page, pgprot_t prot)
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{
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unsigned long vaddr;
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int idx, type;
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type = kmap_atomic_idx_push();
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idx = type + KM_TYPE_NR*smp_processor_id();
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vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
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#ifdef CONFIG_DEBUG_HIGHMEM
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BUG_ON(!pte_none(*(kmap_pte - idx)));
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#endif
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set_pte(kmap_pte-idx, mk_pte(page, prot));
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flush_tlb_one((unsigned long)vaddr);
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return (void *)vaddr;
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}
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EXPORT_SYMBOL(kmap_atomic_high_prot);
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void kunmap_atomic_high(void *kvaddr)
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{
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unsigned long vaddr = (unsigned long) kvaddr & PAGE_MASK;
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int idx;
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if (vaddr < FIXADDR_START)
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return;
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#ifdef CONFIG_DEBUG_HIGHMEM
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idx = KM_TYPE_NR*smp_processor_id() + kmap_atomic_idx();
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BUG_ON(vaddr != __fix_to_virt(FIX_KMAP_BEGIN + idx));
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pte_clear(&init_mm, vaddr, kmap_pte - idx);
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flush_tlb_one(vaddr);
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#else
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(void) idx; /* to kill a warning */
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#endif
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kmap_atomic_idx_pop();
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}
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EXPORT_SYMBOL(kunmap_atomic_high);
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/*
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* This is the same as kmap_atomic() but can map memory that doesn't
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* have a struct page associated with it.
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*/
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void *kmap_atomic_pfn(unsigned long pfn)
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{
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unsigned long vaddr;
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int idx, type;
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pagefault_disable();
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type = kmap_atomic_idx_push();
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idx = type + KM_TYPE_NR*smp_processor_id();
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vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
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set_pte(kmap_pte-idx, pfn_pte(pfn, PAGE_KERNEL));
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flush_tlb_one(vaddr);
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return (void *) vaddr;
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}
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static void __init kmap_pages_init(void)
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{
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unsigned long vaddr;
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pgd_t *pgd;
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pmd_t *pmd;
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pud_t *pud;
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pte_t *pte;
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vaddr = PKMAP_BASE;
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fixrange_init(vaddr, vaddr + PAGE_SIZE*LAST_PKMAP, swapper_pg_dir);
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pgd = swapper_pg_dir + pgd_index(vaddr);
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pud = (pud_t *)pgd;
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pmd = pmd_offset(pud, vaddr);
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pte = pte_offset_kernel(pmd, vaddr);
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pkmap_page_table = pte;
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}
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void __init kmap_init(void)
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{
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unsigned long vaddr;
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kmap_pages_init();
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vaddr = __fix_to_virt(FIX_KMAP_BEGIN);
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kmap_pte = pte_offset_kernel((pmd_t *)pgd_offset_k(vaddr), vaddr);
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}
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