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ca5999fde0
The include/linux/pgtable.h is going to be the home of generic page table manipulation functions. Start with moving asm-generic/pgtable.h to include/linux/pgtable.h and make the latter include asm/pgtable.h. 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/20200514170327.31389-3-rppt@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
270 lines
5.8 KiB
ArmAsm
270 lines
5.8 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0 */
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/* arch/sparc64/kernel/ktlb.S: Kernel mapping TLB miss handling.
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*
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* Copyright (C) 1995, 1997, 2005, 2008 David S. Miller <davem@davemloft.net>
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* Copyright (C) 1996 Eddie C. Dost (ecd@brainaid.de)
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* Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx)
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* Copyright (C) 1996,98,99 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
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*/
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#include <asm/head.h>
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#include <asm/asi.h>
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#include <asm/page.h>
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#include <linux/pgtable.h>
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#include <asm/tsb.h>
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.text
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.align 32
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kvmap_itlb:
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/* g6: TAG TARGET */
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mov TLB_TAG_ACCESS, %g4
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ldxa [%g4] ASI_IMMU, %g4
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/* The kernel executes in context zero, therefore we do not
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* need to clear the context ID bits out of %g4 here.
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*/
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/* sun4v_itlb_miss branches here with the missing virtual
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* address already loaded into %g4
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*/
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kvmap_itlb_4v:
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/* Catch kernel NULL pointer calls. */
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sethi %hi(PAGE_SIZE), %g5
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cmp %g4, %g5
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blu,pn %xcc, kvmap_itlb_longpath
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nop
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KERN_TSB_LOOKUP_TL1(%g4, %g6, %g5, %g1, %g2, %g3, kvmap_itlb_load)
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kvmap_itlb_tsb_miss:
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sethi %hi(LOW_OBP_ADDRESS), %g5
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cmp %g4, %g5
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blu,pn %xcc, kvmap_itlb_vmalloc_addr
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mov 0x1, %g5
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sllx %g5, 32, %g5
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cmp %g4, %g5
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blu,pn %xcc, kvmap_itlb_obp
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nop
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kvmap_itlb_vmalloc_addr:
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KERN_PGTABLE_WALK(%g4, %g5, %g2, kvmap_itlb_longpath)
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TSB_LOCK_TAG(%g1, %g2, %g7)
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TSB_WRITE(%g1, %g5, %g6)
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/* fallthrough to TLB load */
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kvmap_itlb_load:
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661: stxa %g5, [%g0] ASI_ITLB_DATA_IN
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retry
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.section .sun4v_2insn_patch, "ax"
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.word 661b
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nop
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nop
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.previous
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/* For sun4v the ASI_ITLB_DATA_IN store and the retry
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* instruction get nop'd out and we get here to branch
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* to the sun4v tlb load code. The registers are setup
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* as follows:
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*
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* %g4: vaddr
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* %g5: PTE
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* %g6: TAG
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*
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* The sun4v TLB load wants the PTE in %g3 so we fix that
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* up here.
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*/
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ba,pt %xcc, sun4v_itlb_load
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mov %g5, %g3
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kvmap_itlb_longpath:
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661: rdpr %pstate, %g5
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wrpr %g5, PSTATE_AG | PSTATE_MG, %pstate
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.section .sun4v_2insn_patch, "ax"
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.word 661b
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SET_GL(1)
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nop
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.previous
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rdpr %tpc, %g5
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ba,pt %xcc, sparc64_realfault_common
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mov FAULT_CODE_ITLB, %g4
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kvmap_itlb_obp:
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OBP_TRANS_LOOKUP(%g4, %g5, %g2, %g3, kvmap_itlb_longpath)
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TSB_LOCK_TAG(%g1, %g2, %g7)
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TSB_WRITE(%g1, %g5, %g6)
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ba,pt %xcc, kvmap_itlb_load
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nop
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kvmap_dtlb_obp:
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OBP_TRANS_LOOKUP(%g4, %g5, %g2, %g3, kvmap_dtlb_longpath)
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TSB_LOCK_TAG(%g1, %g2, %g7)
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TSB_WRITE(%g1, %g5, %g6)
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ba,pt %xcc, kvmap_dtlb_load
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nop
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kvmap_linear_early:
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sethi %hi(kern_linear_pte_xor), %g7
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ldx [%g7 + %lo(kern_linear_pte_xor)], %g2
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ba,pt %xcc, kvmap_dtlb_tsb4m_load
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xor %g2, %g4, %g5
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.align 32
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kvmap_dtlb_tsb4m_load:
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TSB_LOCK_TAG(%g1, %g2, %g7)
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TSB_WRITE(%g1, %g5, %g6)
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ba,pt %xcc, kvmap_dtlb_load
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nop
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kvmap_dtlb:
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/* %g6: TAG TARGET */
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mov TLB_TAG_ACCESS, %g4
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ldxa [%g4] ASI_DMMU, %g4
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/* The kernel executes in context zero, therefore we do not
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* need to clear the context ID bits out of %g4 here.
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*/
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/* sun4v_dtlb_miss branches here with the missing virtual
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* address already loaded into %g4
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*/
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kvmap_dtlb_4v:
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brgez,pn %g4, kvmap_dtlb_nonlinear
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nop
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#ifdef CONFIG_DEBUG_PAGEALLOC
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/* Index through the base page size TSB even for linear
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* mappings when using page allocation debugging.
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*/
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KERN_TSB_LOOKUP_TL1(%g4, %g6, %g5, %g1, %g2, %g3, kvmap_dtlb_load)
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#else
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/* Correct TAG_TARGET is already in %g6, check 4mb TSB. */
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KERN_TSB4M_LOOKUP_TL1(%g6, %g5, %g1, %g2, %g3, kvmap_dtlb_load)
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#endif
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/* Linear mapping TSB lookup failed. Fallthrough to kernel
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* page table based lookup.
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*/
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.globl kvmap_linear_patch
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kvmap_linear_patch:
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ba,a,pt %xcc, kvmap_linear_early
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kvmap_dtlb_vmalloc_addr:
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KERN_PGTABLE_WALK(%g4, %g5, %g2, kvmap_dtlb_longpath)
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TSB_LOCK_TAG(%g1, %g2, %g7)
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TSB_WRITE(%g1, %g5, %g6)
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/* fallthrough to TLB load */
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kvmap_dtlb_load:
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661: stxa %g5, [%g0] ASI_DTLB_DATA_IN ! Reload TLB
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retry
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.section .sun4v_2insn_patch, "ax"
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.word 661b
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nop
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nop
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.previous
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/* For sun4v the ASI_DTLB_DATA_IN store and the retry
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* instruction get nop'd out and we get here to branch
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* to the sun4v tlb load code. The registers are setup
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* as follows:
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*
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* %g4: vaddr
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* %g5: PTE
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* %g6: TAG
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*
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* The sun4v TLB load wants the PTE in %g3 so we fix that
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* up here.
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*/
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ba,pt %xcc, sun4v_dtlb_load
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mov %g5, %g3
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#ifdef CONFIG_SPARSEMEM_VMEMMAP
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kvmap_vmemmap:
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KERN_PGTABLE_WALK(%g4, %g5, %g2, kvmap_dtlb_longpath)
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ba,a,pt %xcc, kvmap_dtlb_load
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#endif
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kvmap_dtlb_nonlinear:
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/* Catch kernel NULL pointer derefs. */
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sethi %hi(PAGE_SIZE), %g5
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cmp %g4, %g5
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bleu,pn %xcc, kvmap_dtlb_longpath
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nop
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#ifdef CONFIG_SPARSEMEM_VMEMMAP
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/* Do not use the TSB for vmemmap. */
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sethi %hi(VMEMMAP_BASE), %g5
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ldx [%g5 + %lo(VMEMMAP_BASE)], %g5
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cmp %g4,%g5
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bgeu,pn %xcc, kvmap_vmemmap
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nop
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#endif
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KERN_TSB_LOOKUP_TL1(%g4, %g6, %g5, %g1, %g2, %g3, kvmap_dtlb_load)
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kvmap_dtlb_tsbmiss:
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sethi %hi(MODULES_VADDR), %g5
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cmp %g4, %g5
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blu,pn %xcc, kvmap_dtlb_longpath
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sethi %hi(VMALLOC_END), %g5
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ldx [%g5 + %lo(VMALLOC_END)], %g5
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cmp %g4, %g5
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bgeu,pn %xcc, kvmap_dtlb_longpath
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nop
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kvmap_check_obp:
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sethi %hi(LOW_OBP_ADDRESS), %g5
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cmp %g4, %g5
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blu,pn %xcc, kvmap_dtlb_vmalloc_addr
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mov 0x1, %g5
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sllx %g5, 32, %g5
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cmp %g4, %g5
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blu,pn %xcc, kvmap_dtlb_obp
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nop
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ba,pt %xcc, kvmap_dtlb_vmalloc_addr
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nop
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kvmap_dtlb_longpath:
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661: rdpr %pstate, %g5
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wrpr %g5, PSTATE_AG | PSTATE_MG, %pstate
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.section .sun4v_2insn_patch, "ax"
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.word 661b
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SET_GL(1)
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ldxa [%g0] ASI_SCRATCHPAD, %g5
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.previous
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rdpr %tl, %g3
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cmp %g3, 1
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661: mov TLB_TAG_ACCESS, %g4
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ldxa [%g4] ASI_DMMU, %g5
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.section .sun4v_2insn_patch, "ax"
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.word 661b
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ldx [%g5 + HV_FAULT_D_ADDR_OFFSET], %g5
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nop
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.previous
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/* The kernel executes in context zero, therefore we do not
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* need to clear the context ID bits out of %g5 here.
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*/
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be,pt %xcc, sparc64_realfault_common
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mov FAULT_CODE_DTLB, %g4
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ba,pt %xcc, winfix_trampoline
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nop
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