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Merge git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86

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* git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86:
  x86: fix x86-32 early fixmap initialization.
  x86: disable hpet legacy replacement for kdump
  x86: disable hpet on shutdown
This commit is contained in:
Linus Torvalds 2007-12-03 08:45:15 -08:00
commit 1a2edea9af
6 changed files with 33 additions and 6 deletions
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4
arch/x86/kernel/crash.c
View File

@ -22,6 +22,7 @@
#include <asm/nmi.h>
#include <asm/hw_irq.h>
#include <asm/apic.h>
#include <asm/hpet.h>
#include <linux/kdebug.h>
#include <asm/smp.h>
@ -139,6 +140,9 @@ void machine_crash_shutdown(struct pt_regs *regs)
lapic_shutdown();
#if defined(CONFIG_X86_IO_APIC)
disable_IO_APIC();
#endif
#ifdef CONFIG_HPET_TIMER
hpet_disable();
#endif
crash_save_cpu(regs, safe_smp_processor_id());
}

12
arch/x86/kernel/head_32.S
View File

@ -193,6 +193,12 @@ default_entry:
jb 10b
movl %edi,(init_pg_tables_end - __PAGE_OFFSET)
/* Do an early initialization of the fixmap area */
movl $(swapper_pg_dir - __PAGE_OFFSET), %edx
movl $(swapper_pg_pmd - __PAGE_OFFSET), %eax
addl $0x007, %eax /* 0x007 = PRESENT+RW+USER */
movl %eax, 4092(%edx)
xorl %ebx,%ebx /* This is the boot CPU (BSP) */
jmp 3f
/*
@ -208,12 +214,6 @@ default_entry:
.section .init.text,"ax",@progbits
#endif
/* Do an early initialization of the fixmap area */
movl $(swapper_pg_dir - __PAGE_OFFSET), %edx
movl $(swapper_pg_pmd - __PAGE_OFFSET), %eax
addl $0x007, %eax /* 0x007 = PRESENT+RW+USER */
movl %eax, 4092(%edx)
#ifdef CONFIG_SMP
ENTRY(startup_32_smp)
cld

14
arch/x86/kernel/hpet.c
View File

@ -446,6 +446,20 @@ static __init int hpet_late_init(void)
}
fs_initcall(hpet_late_init);
void hpet_disable(void)
{
if (is_hpet_capable()) {
unsigned long cfg = hpet_readl(HPET_CFG);
if (hpet_legacy_int_enabled) {
cfg &= ~HPET_CFG_LEGACY;
hpet_legacy_int_enabled = 0;
}
cfg &= ~HPET_CFG_ENABLE;
hpet_writel(cfg, HPET_CFG);
}
}
#ifdef CONFIG_HPET_EMULATE_RTC
/* HPET in LegacyReplacement Mode eats up RTC interrupt line. When, HPET

4
arch/x86/kernel/reboot_32.c
View File

@ -11,6 +11,7 @@
#include <linux/reboot.h>
#include <asm/uaccess.h>
#include <asm/apic.h>
#include <asm/hpet.h>
#include <asm/desc.h>
#include "mach_reboot.h"
#include <asm/reboot_fixups.h>
@ -326,6 +327,9 @@ static void native_machine_shutdown(void)
#ifdef CONFIG_X86_IO_APIC
disable_IO_APIC();
#endif
#ifdef CONFIG_HPET_TIMER
hpet_disable();
#endif
}
void __attribute__((weak)) mach_reboot_fixups(void)

4
arch/x86/kernel/reboot_64.c
View File

@ -17,6 +17,7 @@
#include <asm/pgtable.h>
#include <asm/tlbflush.h>
#include <asm/apic.h>
#include <asm/hpet.h>
#include <asm/gart.h>
/*
@ -113,6 +114,9 @@ void machine_shutdown(void)
disable_IO_APIC();
#ifdef CONFIG_HPET_TIMER
hpet_disable();
#endif
local_irq_restore(flags);
pci_iommu_shutdown();

1
include/asm-x86/hpet.h
View File

@ -61,6 +61,7 @@ extern unsigned long force_hpet_address;
extern int hpet_force_user;
extern int is_hpet_enabled(void);
extern int hpet_enable(void);
extern void hpet_disable(void);
extern unsigned long hpet_readl(unsigned long a);
extern void force_hpet_resume(void);