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e31cf2f4ca
Patch series "mm: consolidate definitions of page table accessors", v2.
The low level page table accessors (pXY_index(), pXY_offset()) are
duplicated across all architectures and sometimes more than once. For
instance, we have 31 definition of pgd_offset() for 25 supported
architectures.
Most of these definitions are actually identical and typically it boils
down to, e.g.
static inline unsigned long pmd_index(unsigned long address)
{
return (address >> PMD_SHIFT) & (PTRS_PER_PMD - 1);
}
static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address)
{
return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(address);
}
These definitions can be shared among 90% of the arches provided
XYZ_SHIFT, PTRS_PER_XYZ and xyz_page_vaddr() are defined.
For architectures that really need a custom version there is always
possibility to override the generic version with the usual ifdefs magic.
These patches introduce include/linux/pgtable.h that replaces
include/asm-generic/pgtable.h and add the definitions of the page table
accessors to the new header.
This patch (of 12):
The linux/mm.h header includes <asm/pgtable.h> to allow inlining of the
functions involving page table manipulations, e.g. pte_alloc() and
pmd_alloc(). So, there is no point to explicitly include <asm/pgtable.h>
in the files that include <linux/mm.h>.
The include statements in such cases are remove with a simple loop:
for f in $(git grep -l "include <linux/mm.h>") ; do
sed -i -e '/include <asm\/pgtable.h>/ d' $f
done
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: Mike Rapoport <rppt@kernel.org>
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/20200514170327.31389-1-rppt@kernel.org
Link: http://lkml.kernel.org/r/20200514170327.31389-2-rppt@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
485 lines
13 KiB
C
485 lines
13 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* linux/arch/alpha/kernel/sys_sio.c
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*
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* Copyright (C) 1995 David A Rusling
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* Copyright (C) 1996 Jay A Estabrook
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* Copyright (C) 1998, 1999 Richard Henderson
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*
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* Code for all boards that route the PCI interrupts through the SIO
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* PCI/ISA bridge. This includes Noname (AXPpci33), Multia (UDB),
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* Kenetics's Platform 2000, Avanti (AlphaStation), XL, and AlphaBook1.
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*/
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/mm.h>
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#include <linux/sched.h>
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#include <linux/pci.h>
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#include <linux/init.h>
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#include <linux/screen_info.h>
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#include <asm/compiler.h>
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#include <asm/ptrace.h>
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#include <asm/dma.h>
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#include <asm/irq.h>
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#include <asm/mmu_context.h>
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#include <asm/io.h>
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#include <asm/core_apecs.h>
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#include <asm/core_lca.h>
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#include <asm/tlbflush.h>
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#include "proto.h"
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#include "irq_impl.h"
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#include "pci_impl.h"
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#include "machvec_impl.h"
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#include "pc873xx.h"
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#if defined(ALPHA_RESTORE_SRM_SETUP)
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/* Save LCA configuration data as the console had it set up. */
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struct
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{
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unsigned int orig_route_tab; /* for SAVE/RESTORE */
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} saved_config __attribute((common));
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#endif
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static void __init
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sio_init_irq(void)
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{
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if (alpha_using_srm)
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alpha_mv.device_interrupt = srm_device_interrupt;
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init_i8259a_irqs();
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common_init_isa_dma();
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}
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static inline void __init
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alphabook1_init_arch(void)
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{
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/* The AlphaBook1 has LCD video fixed at 800x600,
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37 rows and 100 cols. */
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screen_info.orig_y = 37;
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screen_info.orig_video_cols = 100;
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screen_info.orig_video_lines = 37;
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lca_init_arch();
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}
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/*
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* sio_route_tab selects irq routing in PCI/ISA bridge so that:
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* PIRQ0 -> irq 15
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* PIRQ1 -> irq 9
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* PIRQ2 -> irq 10
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* PIRQ3 -> irq 11
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*
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* This probably ought to be configurable via MILO. For
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* example, sound boards seem to like using IRQ 9.
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*
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* This is NOT how we should do it. PIRQ0-X should have
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* their own IRQs, the way intel uses the IO-APIC IRQs.
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*/
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static void __init
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sio_pci_route(void)
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{
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unsigned int orig_route_tab;
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/* First, ALWAYS read and print the original setting. */
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pci_bus_read_config_dword(pci_isa_hose->bus, PCI_DEVFN(7, 0), 0x60,
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&orig_route_tab);
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printk("%s: PIRQ original 0x%x new 0x%x\n", __func__,
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orig_route_tab, alpha_mv.sys.sio.route_tab);
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#if defined(ALPHA_RESTORE_SRM_SETUP)
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saved_config.orig_route_tab = orig_route_tab;
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#endif
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/* Now override with desired setting. */
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pci_bus_write_config_dword(pci_isa_hose->bus, PCI_DEVFN(7, 0), 0x60,
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alpha_mv.sys.sio.route_tab);
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}
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static bool sio_pci_dev_irq_needs_level(const struct pci_dev *dev)
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{
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if ((dev->class >> 16 == PCI_BASE_CLASS_BRIDGE) &&
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(dev->class >> 8 != PCI_CLASS_BRIDGE_PCMCIA))
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return false;
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return true;
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}
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static unsigned int __init
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sio_collect_irq_levels(void)
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{
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unsigned int level_bits = 0;
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struct pci_dev *dev = NULL;
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/* Iterate through the devices, collecting IRQ levels. */
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for_each_pci_dev(dev) {
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if (!sio_pci_dev_irq_needs_level(dev))
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continue;
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if (dev->irq)
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level_bits |= (1 << dev->irq);
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}
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return level_bits;
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}
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static void __sio_fixup_irq_levels(unsigned int level_bits, bool reset)
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{
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unsigned int old_level_bits;
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/*
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* Now, make all PCI interrupts level sensitive. Notice:
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* these registers must be accessed byte-wise. inw()/outw()
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* don't work.
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*
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* Make sure to turn off any level bits set for IRQs 9,10,11,15,
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* so that the only bits getting set are for devices actually found.
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* Note that we do preserve the remainder of the bits, which we hope
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* will be set correctly by ARC/SRM.
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*
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* Note: we at least preserve any level-set bits on AlphaBook1
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*/
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old_level_bits = inb(0x4d0) | (inb(0x4d1) << 8);
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if (reset)
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old_level_bits &= 0x71ff;
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level_bits |= old_level_bits;
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outb((level_bits >> 0) & 0xff, 0x4d0);
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outb((level_bits >> 8) & 0xff, 0x4d1);
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}
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static inline void
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sio_fixup_irq_levels(unsigned int level_bits)
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{
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__sio_fixup_irq_levels(level_bits, true);
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}
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static inline int
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noname_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
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{
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/*
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* The Noname board has 5 PCI slots with each of the 4
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* interrupt pins routed to different pins on the PCI/ISA
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* bridge (PIRQ0-PIRQ3). The table below is based on
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* information available at:
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*
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* http://ftp.digital.com/pub/DEC/axppci/ref_interrupts.txt
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*
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* I have no information on the Avanti interrupt routing, but
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* the routing seems to be identical to the Noname except
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* that the Avanti has an additional slot whose routing I'm
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* unsure of.
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*
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* pirq_tab[0] is a fake entry to deal with old PCI boards
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* that have the interrupt pin number hardwired to 0 (meaning
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* that they use the default INTA line, if they are interrupt
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* driven at all).
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*/
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static char irq_tab[][5] = {
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/*INT A B C D */
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{ 3, 3, 3, 3, 3}, /* idsel 6 (53c810) */
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{-1, -1, -1, -1, -1}, /* idsel 7 (SIO: PCI/ISA bridge) */
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{ 2, 2, -1, -1, -1}, /* idsel 8 (Hack: slot closest ISA) */
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{-1, -1, -1, -1, -1}, /* idsel 9 (unused) */
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{-1, -1, -1, -1, -1}, /* idsel 10 (unused) */
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{ 0, 0, 2, 1, 0}, /* idsel 11 KN25_PCI_SLOT0 */
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{ 1, 1, 0, 2, 1}, /* idsel 12 KN25_PCI_SLOT1 */
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{ 2, 2, 1, 0, 2}, /* idsel 13 KN25_PCI_SLOT2 */
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{ 0, 0, 0, 0, 0}, /* idsel 14 AS255 TULIP */
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};
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const long min_idsel = 6, max_idsel = 14, irqs_per_slot = 5;
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int irq = COMMON_TABLE_LOOKUP, tmp;
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tmp = __kernel_extbl(alpha_mv.sys.sio.route_tab, irq);
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irq = irq >= 0 ? tmp : -1;
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/* Fixup IRQ level if an actual IRQ mapping is detected */
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if (sio_pci_dev_irq_needs_level(dev) && irq >= 0)
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__sio_fixup_irq_levels(1 << irq, false);
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return irq;
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}
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static inline int
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p2k_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
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{
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static char irq_tab[][5] = {
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/*INT A B C D */
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{ 0, 0, -1, -1, -1}, /* idsel 6 (53c810) */
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{-1, -1, -1, -1, -1}, /* idsel 7 (SIO: PCI/ISA bridge) */
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{ 1, 1, 2, 3, 0}, /* idsel 8 (slot A) */
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{ 2, 2, 3, 0, 1}, /* idsel 9 (slot B) */
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{-1, -1, -1, -1, -1}, /* idsel 10 (unused) */
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{-1, -1, -1, -1, -1}, /* idsel 11 (unused) */
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{ 3, 3, -1, -1, -1}, /* idsel 12 (CMD0646) */
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};
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const long min_idsel = 6, max_idsel = 12, irqs_per_slot = 5;
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int irq = COMMON_TABLE_LOOKUP, tmp;
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tmp = __kernel_extbl(alpha_mv.sys.sio.route_tab, irq);
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return irq >= 0 ? tmp : -1;
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}
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static inline void __init
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noname_init_pci(void)
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{
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common_init_pci();
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sio_pci_route();
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sio_fixup_irq_levels(sio_collect_irq_levels());
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if (pc873xx_probe() == -1) {
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printk(KERN_ERR "Probing for PC873xx Super IO chip failed.\n");
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} else {
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printk(KERN_INFO "Found %s Super IO chip at 0x%x\n",
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pc873xx_get_model(), pc873xx_get_base());
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/* Enabling things in the Super IO chip doesn't actually
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* configure and enable things, the legacy drivers still
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* need to do the actual configuration and enabling.
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* This only unblocks them.
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*/
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#if !defined(CONFIG_ALPHA_AVANTI)
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/* Don't bother on the Avanti family.
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* None of them had on-board IDE.
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*/
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pc873xx_enable_ide();
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#endif
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pc873xx_enable_epp19();
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}
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}
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static inline void __init
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alphabook1_init_pci(void)
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{
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struct pci_dev *dev;
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unsigned char orig, config;
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common_init_pci();
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sio_pci_route();
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/*
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* On the AlphaBook1, the PCMCIA chip (Cirrus 6729)
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* is sensitive to PCI bus bursts, so we must DISABLE
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* burst mode for the NCR 8xx SCSI... :-(
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*
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* Note that the NCR810 SCSI driver must preserve the
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* setting of the bit in order for this to work. At the
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* moment (2.0.29), ncr53c8xx.c does NOT do this, but
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* 53c7,8xx.c DOES.
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*/
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dev = NULL;
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while ((dev = pci_get_device(PCI_VENDOR_ID_NCR, PCI_ANY_ID, dev))) {
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if (dev->device == PCI_DEVICE_ID_NCR_53C810
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|| dev->device == PCI_DEVICE_ID_NCR_53C815
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|| dev->device == PCI_DEVICE_ID_NCR_53C820
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|| dev->device == PCI_DEVICE_ID_NCR_53C825) {
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unsigned long io_port;
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unsigned char ctest4;
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io_port = dev->resource[0].start;
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ctest4 = inb(io_port+0x21);
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if (!(ctest4 & 0x80)) {
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printk("AlphaBook1 NCR init: setting"
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" burst disable\n");
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outb(ctest4 | 0x80, io_port+0x21);
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}
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}
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}
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/* Do not set *ANY* level triggers for AlphaBook1. */
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sio_fixup_irq_levels(0);
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/* Make sure that register PR1 indicates 1Mb mem */
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outb(0x0f, 0x3ce); orig = inb(0x3cf); /* read PR5 */
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outb(0x0f, 0x3ce); outb(0x05, 0x3cf); /* unlock PR0-4 */
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outb(0x0b, 0x3ce); config = inb(0x3cf); /* read PR1 */
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if ((config & 0xc0) != 0xc0) {
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printk("AlphaBook1 VGA init: setting 1Mb memory\n");
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config |= 0xc0;
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outb(0x0b, 0x3ce); outb(config, 0x3cf); /* write PR1 */
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}
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outb(0x0f, 0x3ce); outb(orig, 0x3cf); /* (re)lock PR0-4 */
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}
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void
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sio_kill_arch(int mode)
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{
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#if defined(ALPHA_RESTORE_SRM_SETUP)
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/* Since we cannot read the PCI DMA Window CSRs, we
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* cannot restore them here.
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*
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* However, we CAN read the PIRQ route register, so restore it
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* now...
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*/
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pci_bus_write_config_dword(pci_isa_hose->bus, PCI_DEVFN(7, 0), 0x60,
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saved_config.orig_route_tab);
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#endif
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}
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/*
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* The System Vectors
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*/
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#if defined(CONFIG_ALPHA_GENERIC) || defined(CONFIG_ALPHA_BOOK1)
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struct alpha_machine_vector alphabook1_mv __initmv = {
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.vector_name = "AlphaBook1",
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DO_EV4_MMU,
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DO_DEFAULT_RTC,
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DO_LCA_IO,
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.machine_check = lca_machine_check,
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.max_isa_dma_address = ALPHA_MAX_ISA_DMA_ADDRESS,
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.min_io_address = DEFAULT_IO_BASE,
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.min_mem_address = APECS_AND_LCA_DEFAULT_MEM_BASE,
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.nr_irqs = 16,
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.device_interrupt = isa_device_interrupt,
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.init_arch = alphabook1_init_arch,
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.init_irq = sio_init_irq,
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.init_rtc = common_init_rtc,
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.init_pci = alphabook1_init_pci,
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.kill_arch = sio_kill_arch,
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.pci_map_irq = noname_map_irq,
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.pci_swizzle = common_swizzle,
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.sys = { .sio = {
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/* NCR810 SCSI is 14, PCMCIA controller is 15. */
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.route_tab = 0x0e0f0a0a,
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}}
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};
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ALIAS_MV(alphabook1)
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#endif
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#if defined(CONFIG_ALPHA_GENERIC) || defined(CONFIG_ALPHA_AVANTI)
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struct alpha_machine_vector avanti_mv __initmv = {
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.vector_name = "Avanti",
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DO_EV4_MMU,
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DO_DEFAULT_RTC,
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DO_APECS_IO,
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.machine_check = apecs_machine_check,
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.max_isa_dma_address = ALPHA_MAX_ISA_DMA_ADDRESS,
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.min_io_address = DEFAULT_IO_BASE,
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.min_mem_address = APECS_AND_LCA_DEFAULT_MEM_BASE,
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.nr_irqs = 16,
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.device_interrupt = isa_device_interrupt,
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.init_arch = apecs_init_arch,
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.init_irq = sio_init_irq,
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.init_rtc = common_init_rtc,
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.init_pci = noname_init_pci,
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.kill_arch = sio_kill_arch,
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.pci_map_irq = noname_map_irq,
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.pci_swizzle = common_swizzle,
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.sys = { .sio = {
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.route_tab = 0x0b0a050f, /* leave 14 for IDE, 9 for SND */
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}}
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};
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ALIAS_MV(avanti)
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#endif
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#if defined(CONFIG_ALPHA_GENERIC) || defined(CONFIG_ALPHA_NONAME)
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struct alpha_machine_vector noname_mv __initmv = {
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.vector_name = "Noname",
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DO_EV4_MMU,
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DO_DEFAULT_RTC,
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DO_LCA_IO,
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.machine_check = lca_machine_check,
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.max_isa_dma_address = ALPHA_MAX_ISA_DMA_ADDRESS,
|
|
.min_io_address = DEFAULT_IO_BASE,
|
|
.min_mem_address = APECS_AND_LCA_DEFAULT_MEM_BASE,
|
|
|
|
.nr_irqs = 16,
|
|
.device_interrupt = srm_device_interrupt,
|
|
|
|
.init_arch = lca_init_arch,
|
|
.init_irq = sio_init_irq,
|
|
.init_rtc = common_init_rtc,
|
|
.init_pci = noname_init_pci,
|
|
.kill_arch = sio_kill_arch,
|
|
.pci_map_irq = noname_map_irq,
|
|
.pci_swizzle = common_swizzle,
|
|
|
|
.sys = { .sio = {
|
|
/* For UDB, the only available PCI slot must not map to IRQ 9,
|
|
since that's the builtin MSS sound chip. That PCI slot
|
|
will map to PIRQ1 (for INTA at least), so we give it IRQ 15
|
|
instead.
|
|
|
|
Unfortunately we have to do this for NONAME as well, since
|
|
they are co-indicated when the platform type "Noname" is
|
|
selected... :-( */
|
|
|
|
.route_tab = 0x0b0a0f0d,
|
|
}}
|
|
};
|
|
ALIAS_MV(noname)
|
|
#endif
|
|
|
|
#if defined(CONFIG_ALPHA_GENERIC) || defined(CONFIG_ALPHA_P2K)
|
|
struct alpha_machine_vector p2k_mv __initmv = {
|
|
.vector_name = "Platform2000",
|
|
DO_EV4_MMU,
|
|
DO_DEFAULT_RTC,
|
|
DO_LCA_IO,
|
|
.machine_check = lca_machine_check,
|
|
.max_isa_dma_address = ALPHA_MAX_ISA_DMA_ADDRESS,
|
|
.min_io_address = DEFAULT_IO_BASE,
|
|
.min_mem_address = APECS_AND_LCA_DEFAULT_MEM_BASE,
|
|
|
|
.nr_irqs = 16,
|
|
.device_interrupt = srm_device_interrupt,
|
|
|
|
.init_arch = lca_init_arch,
|
|
.init_irq = sio_init_irq,
|
|
.init_rtc = common_init_rtc,
|
|
.init_pci = noname_init_pci,
|
|
.kill_arch = sio_kill_arch,
|
|
.pci_map_irq = p2k_map_irq,
|
|
.pci_swizzle = common_swizzle,
|
|
|
|
.sys = { .sio = {
|
|
.route_tab = 0x0b0a090f,
|
|
}}
|
|
};
|
|
ALIAS_MV(p2k)
|
|
#endif
|
|
|
|
#if defined(CONFIG_ALPHA_GENERIC) || defined(CONFIG_ALPHA_XL)
|
|
struct alpha_machine_vector xl_mv __initmv = {
|
|
.vector_name = "XL",
|
|
DO_EV4_MMU,
|
|
DO_DEFAULT_RTC,
|
|
DO_APECS_IO,
|
|
.machine_check = apecs_machine_check,
|
|
.max_isa_dma_address = ALPHA_XL_MAX_ISA_DMA_ADDRESS,
|
|
.min_io_address = DEFAULT_IO_BASE,
|
|
.min_mem_address = XL_DEFAULT_MEM_BASE,
|
|
|
|
.nr_irqs = 16,
|
|
.device_interrupt = isa_device_interrupt,
|
|
|
|
.init_arch = apecs_init_arch,
|
|
.init_irq = sio_init_irq,
|
|
.init_rtc = common_init_rtc,
|
|
.init_pci = noname_init_pci,
|
|
.kill_arch = sio_kill_arch,
|
|
.pci_map_irq = noname_map_irq,
|
|
.pci_swizzle = common_swizzle,
|
|
|
|
.sys = { .sio = {
|
|
.route_tab = 0x0b0a090f,
|
|
}}
|
|
};
|
|
ALIAS_MV(xl)
|
|
#endif
|