Messages in this thread Patch in this message | | | Subject | [PATCH 2/14] kexec: i8259-sysfs.x86_64 | From | (Eric W. Biederman) | Date | 20 Aug 2004 11:57:01 -0600 |
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The i8259 does not yet have sysfs support on x86_64 so here is the port from i386, including the shutdown code to disable it on reboot that kexec appreciates.
diff -uNr linux-2.6.8.1-mm2-i8259-shutdown.i386/arch/x86_64/kernel/i8259.c linux-2.6.8.1-mm2-i8259-sysfs.x86_64/arch/x86_64/kernel/i8259.c --- linux-2.6.8.1-mm2-i8259-shutdown.i386/arch/x86_64/kernel/i8259.c Fri Aug 20 09:56:29 2004 +++ linux-2.6.8.1-mm2-i8259-sysfs.x86_64/arch/x86_64/kernel/i8259.c Fri Aug 20 10:38:36 2004 @@ -343,6 +343,44 @@ } } +static int i8259A_resume(struct sys_device *dev) +{ + init_8259A(0); + return 0; +} + +static int i8259A_shutdown(struct sys_device *dev) +{ + /* Put the i8259A into a quiescent state that + * the kernel initialization code can get it + * out of. + */ + outb(0xff, 0x21); /* mask all of 8259A-1 */ + outb(0xff, 0xA1); /* mask all of 8259A-1 */ + return 0; +} + +static struct sysdev_class i8259_sysdev_class = { + set_kset_name("i8259"), + .resume = i8259A_resume, + .shutdown = i8259A_shutdown, +}; + +static struct sys_device device_i8259A = { + .id = 0, + .cls = &i8259_sysdev_class, +}; + +static int __init i8259A_init_sysfs(void) +{ + int error = sysdev_class_register(&i8259_sysdev_class); + if (!error) + error = sysdev_register(&device_i8259A); + return error; +} + +device_initcall(i8259A_init_sysfs); + void init_8259A(int auto_eoi) { unsigned long flags; - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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