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![Mike Rapoport](/assets/img/avatar_default.png)
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>
147 lines
3.4 KiB
C
147 lines
3.4 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General
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* Public License. See the file "COPYING" in the main directory of this
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* archive for more details.
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*
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* Copyright (C) 2000 - 2001 by Kanoj Sarcar (kanoj@sgi.com)
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* Copyright (C) 2000 - 2001 by Silicon Graphics, Inc.
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/sched.h>
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#include <linux/smp.h>
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#include <linux/mm.h>
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#include <linux/export.h>
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#include <linux/cpumask.h>
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#include <asm/bootinfo.h>
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#include <asm/cpu.h>
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#include <asm/io.h>
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#include <asm/sgialib.h>
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#include <asm/time.h>
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#include <asm/sn/agent.h>
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#include <asm/sn/types.h>
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#include <asm/sn/klconfig.h>
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#include <asm/sn/ioc3.h>
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#include <asm/mipsregs.h>
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#include <asm/sn/gda.h>
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#include <asm/sn/intr.h>
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#include <asm/current.h>
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#include <asm/processor.h>
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#include <asm/mmu_context.h>
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#include <asm/thread_info.h>
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#include <asm/sn/launch.h>
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#include <asm/sn/mapped_kernel.h>
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#include "ip27-common.h"
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#define CPU_NONE (cpuid_t)-1
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static DECLARE_BITMAP(hub_init_mask, MAX_NUMNODES);
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nasid_t master_nasid = INVALID_NASID;
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struct cpuinfo_ip27 sn_cpu_info[NR_CPUS];
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EXPORT_SYMBOL_GPL(sn_cpu_info);
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static void per_hub_init(nasid_t nasid)
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{
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struct hub_data *hub = hub_data(nasid);
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cpumask_set_cpu(smp_processor_id(), &hub->h_cpus);
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if (test_and_set_bit(nasid, hub_init_mask))
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return;
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/*
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* Set CRB timeout at 5ms, (< PI timeout of 10ms)
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*/
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REMOTE_HUB_S(nasid, IIO_ICTP, 0x800);
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REMOTE_HUB_S(nasid, IIO_ICTO, 0xff);
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hub_rtc_init(nasid);
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if (nasid) {
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/* copy exception handlers from first node to current node */
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memcpy((void *)NODE_OFFSET_TO_K0(nasid, 0),
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(void *)CKSEG0, 0x200);
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__flush_cache_all();
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/* switch to node local exception handlers */
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REMOTE_HUB_S(nasid, PI_CALIAS_SIZE, PI_CALIAS_SIZE_8K);
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}
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}
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void per_cpu_init(void)
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{
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int cpu = smp_processor_id();
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nasid_t nasid = get_nasid();
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clear_c0_status(ST0_IM);
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per_hub_init(nasid);
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pr_info("CPU %d clock is %dMHz.\n", cpu, sn_cpu_info[cpu].p_speed);
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install_ipi();
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/* Install our NMI handler if symmon hasn't installed one. */
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install_cpu_nmi_handler(cputoslice(cpu));
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enable_percpu_irq(IP27_HUB_PEND0_IRQ, IRQ_TYPE_NONE);
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enable_percpu_irq(IP27_HUB_PEND1_IRQ, IRQ_TYPE_NONE);
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}
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void __init plat_mem_setup(void)
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{
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u64 p, e, n_mode;
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nasid_t nid;
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register_smp_ops(&ip27_smp_ops);
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ip27_reboot_setup();
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/*
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* hub_rtc init and cpu clock intr enabled for later calibrate_delay.
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*/
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nid = get_nasid();
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printk("IP27: Running on node %d.\n", nid);
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p = LOCAL_HUB_L(PI_CPU_PRESENT_A) & 1;
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e = LOCAL_HUB_L(PI_CPU_ENABLE_A) & 1;
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printk("Node %d has %s primary CPU%s.\n", nid,
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p ? "a" : "no",
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e ? ", CPU is running" : "");
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p = LOCAL_HUB_L(PI_CPU_PRESENT_B) & 1;
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e = LOCAL_HUB_L(PI_CPU_ENABLE_B) & 1;
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printk("Node %d has %s secondary CPU%s.\n", nid,
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p ? "a" : "no",
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e ? ", CPU is running" : "");
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/*
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* Try to catch kernel missconfigurations and give user an
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* indication what option to select.
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*/
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n_mode = LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_MORENODES_MASK;
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printk("Machine is in %c mode.\n", n_mode ? 'N' : 'M');
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#ifdef CONFIG_SGI_SN_N_MODE
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if (!n_mode)
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panic("Kernel compiled for M mode.");
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#else
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if (n_mode)
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panic("Kernel compiled for N mode.");
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#endif
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ioport_resource.start = 0;
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ioport_resource.end = ~0UL;
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set_io_port_base(IO_BASE);
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}
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const char *get_system_type(void)
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{
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return "SGI Origin";
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}
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void __init prom_init(void)
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{
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prom_init_cmdline(fw_arg0, (LONG *)fw_arg1);
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prom_meminit();
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}
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