From: Thomas Gleixner Date: Thu, 11 Oct 2007 09:15:03 +0000 (+0200) Subject: x86_64: prepare shared kernel/reboot.c X-Git-Tag: v4.13~35305 X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=1cce595a8394105ea56499f94373dd8d5b0d3b51;p=mirror_ubuntu-bionic-kernel.git x86_64: prepare shared kernel/reboot.c Signed-off-by: Thomas Gleixner Signed-off-by: Ingo Molnar --- diff --git a/arch/x86_64/kernel/Makefile b/arch/x86_64/kernel/Makefile index 2bbe7df19daa..bb043aee7f4a 100644 --- a/arch/x86_64/kernel/Makefile +++ b/arch/x86_64/kernel/Makefile @@ -7,7 +7,7 @@ EXTRA_AFLAGS := -traditional obj-y := process.o signal_64.o entry.o traps_64.o irq_64.o \ ptrace_64.o time_64.o ioport_64.o ldt.o setup_64.o i8259_64.o sys_x86_64.o \ x8664_ksyms.o i387_64.o syscall.o vsyscall_64.o \ - setup64.o bootflag.o e820_64.o reboot.o quirks.o i8237.o \ + setup64.o bootflag.o e820_64.o reboot_64.o quirks.o i8237.o \ pci-dma_64.o pci-nommu_64.o alternative.o hpet_64.o tsc.o bugs_64.o \ perfctr-watchdog.o diff --git a/arch/x86_64/kernel/reboot.c b/arch/x86_64/kernel/reboot.c deleted file mode 100644 index 368db2b9c5ac..000000000000 --- a/arch/x86_64/kernel/reboot.c +++ /dev/null @@ -1,171 +0,0 @@ -/* Various gunk just to reboot the machine. */ -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -/* - * Power off function, if any - */ -void (*pm_power_off)(void); -EXPORT_SYMBOL(pm_power_off); - -static long no_idt[3]; -static enum { - BOOT_TRIPLE = 't', - BOOT_KBD = 'k' -} reboot_type = BOOT_KBD; -static int reboot_mode = 0; -int reboot_force; - -/* reboot=t[riple] | k[bd] [, [w]arm | [c]old] - warm Don't set the cold reboot flag - cold Set the cold reboot flag - triple Force a triple fault (init) - kbd Use the keyboard controller. cold reset (default) - force Avoid anything that could hang. - */ -static int __init reboot_setup(char *str) -{ - for (;;) { - switch (*str) { - case 'w': - reboot_mode = 0x1234; - break; - - case 'c': - reboot_mode = 0; - break; - - case 't': - case 'b': - case 'k': - reboot_type = *str; - break; - case 'f': - reboot_force = 1; - break; - } - if((str = strchr(str,',')) != NULL) - str++; - else - break; - } - return 1; -} - -__setup("reboot=", reboot_setup); - -static inline void kb_wait(void) -{ - int i; - - for (i=0; i<0x10000; i++) - if ((inb_p(0x64) & 0x02) == 0) - break; -} - -void machine_shutdown(void) -{ - unsigned long flags; - - /* Stop the cpus and apics */ -#ifdef CONFIG_SMP - int reboot_cpu_id; - - /* The boot cpu is always logical cpu 0 */ - reboot_cpu_id = 0; - - /* Make certain the cpu I'm about to reboot on is online */ - if (!cpu_isset(reboot_cpu_id, cpu_online_map)) { - reboot_cpu_id = smp_processor_id(); - } - - /* Make certain I only run on the appropriate processor */ - set_cpus_allowed(current, cpumask_of_cpu(reboot_cpu_id)); - - /* O.K Now that I'm on the appropriate processor, - * stop all of the others. - */ - smp_send_stop(); -#endif - - local_irq_save(flags); - -#ifndef CONFIG_SMP - disable_local_APIC(); -#endif - - disable_IO_APIC(); - - local_irq_restore(flags); - - pci_iommu_shutdown(); -} - -void machine_emergency_restart(void) -{ - int i; - - /* Tell the BIOS if we want cold or warm reboot */ - *((unsigned short *)__va(0x472)) = reboot_mode; - - for (;;) { - /* Could also try the reset bit in the Hammer NB */ - switch (reboot_type) { - case BOOT_KBD: - for (i=0; i<10; i++) { - kb_wait(); - udelay(50); - outb(0xfe,0x64); /* pulse reset low */ - udelay(50); - } - - case BOOT_TRIPLE: - __asm__ __volatile__("lidt (%0)": :"r" (&no_idt)); - __asm__ __volatile__("int3"); - - reboot_type = BOOT_KBD; - break; - } - } -} - -void machine_restart(char * __unused) -{ - printk("machine restart\n"); - - if (!reboot_force) { - machine_shutdown(); - } - machine_emergency_restart(); -} - -void machine_halt(void) -{ -} - -void machine_power_off(void) -{ - if (pm_power_off) { - if (!reboot_force) { - machine_shutdown(); - } - pm_power_off(); - } -} - diff --git a/arch/x86_64/kernel/reboot_64.c b/arch/x86_64/kernel/reboot_64.c new file mode 100644 index 000000000000..368db2b9c5ac --- /dev/null +++ b/arch/x86_64/kernel/reboot_64.c @@ -0,0 +1,171 @@ +/* Various gunk just to reboot the machine. */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* + * Power off function, if any + */ +void (*pm_power_off)(void); +EXPORT_SYMBOL(pm_power_off); + +static long no_idt[3]; +static enum { + BOOT_TRIPLE = 't', + BOOT_KBD = 'k' +} reboot_type = BOOT_KBD; +static int reboot_mode = 0; +int reboot_force; + +/* reboot=t[riple] | k[bd] [, [w]arm | [c]old] + warm Don't set the cold reboot flag + cold Set the cold reboot flag + triple Force a triple fault (init) + kbd Use the keyboard controller. cold reset (default) + force Avoid anything that could hang. + */ +static int __init reboot_setup(char *str) +{ + for (;;) { + switch (*str) { + case 'w': + reboot_mode = 0x1234; + break; + + case 'c': + reboot_mode = 0; + break; + + case 't': + case 'b': + case 'k': + reboot_type = *str; + break; + case 'f': + reboot_force = 1; + break; + } + if((str = strchr(str,',')) != NULL) + str++; + else + break; + } + return 1; +} + +__setup("reboot=", reboot_setup); + +static inline void kb_wait(void) +{ + int i; + + for (i=0; i<0x10000; i++) + if ((inb_p(0x64) & 0x02) == 0) + break; +} + +void machine_shutdown(void) +{ + unsigned long flags; + + /* Stop the cpus and apics */ +#ifdef CONFIG_SMP + int reboot_cpu_id; + + /* The boot cpu is always logical cpu 0 */ + reboot_cpu_id = 0; + + /* Make certain the cpu I'm about to reboot on is online */ + if (!cpu_isset(reboot_cpu_id, cpu_online_map)) { + reboot_cpu_id = smp_processor_id(); + } + + /* Make certain I only run on the appropriate processor */ + set_cpus_allowed(current, cpumask_of_cpu(reboot_cpu_id)); + + /* O.K Now that I'm on the appropriate processor, + * stop all of the others. + */ + smp_send_stop(); +#endif + + local_irq_save(flags); + +#ifndef CONFIG_SMP + disable_local_APIC(); +#endif + + disable_IO_APIC(); + + local_irq_restore(flags); + + pci_iommu_shutdown(); +} + +void machine_emergency_restart(void) +{ + int i; + + /* Tell the BIOS if we want cold or warm reboot */ + *((unsigned short *)__va(0x472)) = reboot_mode; + + for (;;) { + /* Could also try the reset bit in the Hammer NB */ + switch (reboot_type) { + case BOOT_KBD: + for (i=0; i<10; i++) { + kb_wait(); + udelay(50); + outb(0xfe,0x64); /* pulse reset low */ + udelay(50); + } + + case BOOT_TRIPLE: + __asm__ __volatile__("lidt (%0)": :"r" (&no_idt)); + __asm__ __volatile__("int3"); + + reboot_type = BOOT_KBD; + break; + } + } +} + +void machine_restart(char * __unused) +{ + printk("machine restart\n"); + + if (!reboot_force) { + machine_shutdown(); + } + machine_emergency_restart(); +} + +void machine_halt(void) +{ +} + +void machine_power_off(void) +{ + if (pm_power_off) { + if (!reboot_force) { + machine_shutdown(); + } + pm_power_off(); + } +} +