mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-14 14:34:28 +08:00
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>
148 lines
3.4 KiB
C
148 lines
3.4 KiB
C
/*
|
|
* This file is subject to the terms and conditions of the GNU General
|
|
* Public License. See the file "COPYING" in the main directory of this
|
|
* archive for more details.
|
|
*
|
|
* Copyright (C) 2000 - 2001 by Kanoj Sarcar (kanoj@sgi.com)
|
|
* Copyright (C) 2000 - 2001 by Silicon Graphics, Inc.
|
|
*/
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/smp.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/export.h>
|
|
#include <linux/cpumask.h>
|
|
#include <asm/bootinfo.h>
|
|
#include <asm/cpu.h>
|
|
#include <asm/io.h>
|
|
#include <asm/sgialib.h>
|
|
#include <asm/time.h>
|
|
#include <asm/sn/agent.h>
|
|
#include <asm/sn/types.h>
|
|
#include <asm/sn/klconfig.h>
|
|
#include <asm/sn/ioc3.h>
|
|
#include <asm/mipsregs.h>
|
|
#include <asm/sn/gda.h>
|
|
#include <asm/sn/intr.h>
|
|
#include <asm/current.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/mmu_context.h>
|
|
#include <asm/thread_info.h>
|
|
#include <asm/sn/launch.h>
|
|
#include <asm/sn/mapped_kernel.h>
|
|
|
|
#include "ip27-common.h"
|
|
|
|
#define CPU_NONE (cpuid_t)-1
|
|
|
|
static DECLARE_BITMAP(hub_init_mask, MAX_NUMNODES);
|
|
nasid_t master_nasid = INVALID_NASID;
|
|
|
|
struct cpuinfo_ip27 sn_cpu_info[NR_CPUS];
|
|
EXPORT_SYMBOL_GPL(sn_cpu_info);
|
|
|
|
static void per_hub_init(nasid_t nasid)
|
|
{
|
|
struct hub_data *hub = hub_data(nasid);
|
|
|
|
cpumask_set_cpu(smp_processor_id(), &hub->h_cpus);
|
|
|
|
if (test_and_set_bit(nasid, hub_init_mask))
|
|
return;
|
|
/*
|
|
* Set CRB timeout at 5ms, (< PI timeout of 10ms)
|
|
*/
|
|
REMOTE_HUB_S(nasid, IIO_ICTP, 0x800);
|
|
REMOTE_HUB_S(nasid, IIO_ICTO, 0xff);
|
|
|
|
hub_rtc_init(nasid);
|
|
|
|
if (nasid) {
|
|
/* copy exception handlers from first node to current node */
|
|
memcpy((void *)NODE_OFFSET_TO_K0(nasid, 0),
|
|
(void *)CKSEG0, 0x200);
|
|
__flush_cache_all();
|
|
/* switch to node local exception handlers */
|
|
REMOTE_HUB_S(nasid, PI_CALIAS_SIZE, PI_CALIAS_SIZE_8K);
|
|
}
|
|
}
|
|
|
|
void per_cpu_init(void)
|
|
{
|
|
int cpu = smp_processor_id();
|
|
nasid_t nasid = get_nasid();
|
|
|
|
clear_c0_status(ST0_IM);
|
|
|
|
per_hub_init(nasid);
|
|
|
|
pr_info("CPU %d clock is %dMHz.\n", cpu, sn_cpu_info[cpu].p_speed);
|
|
|
|
install_ipi();
|
|
|
|
/* Install our NMI handler if symmon hasn't installed one. */
|
|
install_cpu_nmi_handler(cputoslice(cpu));
|
|
|
|
enable_percpu_irq(IP27_HUB_PEND0_IRQ, IRQ_TYPE_NONE);
|
|
enable_percpu_irq(IP27_HUB_PEND1_IRQ, IRQ_TYPE_NONE);
|
|
}
|
|
|
|
void __init plat_mem_setup(void)
|
|
{
|
|
u64 p, e, n_mode;
|
|
nasid_t nid;
|
|
|
|
register_smp_ops(&ip27_smp_ops);
|
|
|
|
ip27_reboot_setup();
|
|
|
|
/*
|
|
* hub_rtc init and cpu clock intr enabled for later calibrate_delay.
|
|
*/
|
|
nid = get_nasid();
|
|
printk("IP27: Running on node %d.\n", nid);
|
|
|
|
p = LOCAL_HUB_L(PI_CPU_PRESENT_A) & 1;
|
|
e = LOCAL_HUB_L(PI_CPU_ENABLE_A) & 1;
|
|
printk("Node %d has %s primary CPU%s.\n", nid,
|
|
p ? "a" : "no",
|
|
e ? ", CPU is running" : "");
|
|
|
|
p = LOCAL_HUB_L(PI_CPU_PRESENT_B) & 1;
|
|
e = LOCAL_HUB_L(PI_CPU_ENABLE_B) & 1;
|
|
printk("Node %d has %s secondary CPU%s.\n", nid,
|
|
p ? "a" : "no",
|
|
e ? ", CPU is running" : "");
|
|
|
|
/*
|
|
* Try to catch kernel missconfigurations and give user an
|
|
* indication what option to select.
|
|
*/
|
|
n_mode = LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_MORENODES_MASK;
|
|
printk("Machine is in %c mode.\n", n_mode ? 'N' : 'M');
|
|
#ifdef CONFIG_SGI_SN_N_MODE
|
|
if (!n_mode)
|
|
panic("Kernel compiled for M mode.");
|
|
#else
|
|
if (n_mode)
|
|
panic("Kernel compiled for N mode.");
|
|
#endif
|
|
|
|
ioport_resource.start = 0;
|
|
ioport_resource.end = ~0UL;
|
|
set_io_port_base(IO_BASE);
|
|
}
|
|
|
|
const char *get_system_type(void)
|
|
{
|
|
return "SGI Origin";
|
|
}
|
|
|
|
void __init prom_init(void)
|
|
{
|
|
prom_init_cmdline(fw_arg0, (LONG *)fw_arg1);
|
|
prom_meminit();
|
|
}
|
|
|