Messages in this thread Patch in this message |  | | Date | Thu, 4 Oct 2001 18:34:15 -0700 | From | Richard Henderson <> | Subject | alpha 2.4.11-pre3: delay disabling early boot messages |
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>From Jay Estabrook:
Alpha has this nice way to output console messages via SRM callbacks which we can enable immediately on bootup, and so get debugging output before console_init. This patch delays when we turn that off, and so narrows the window in which we can't get debug output.
r~
diff -rup 2.4.10-dist/arch/alpha/kernel/irq_alpha.c 2.4.10/arch/alpha/kernel/irq_alpha.c --- 2.4.10-dist/arch/alpha/kernel/irq_alpha.c Mon Sep 17 13:16:30 2001 +++ 2.4.10/arch/alpha/kernel/irq_alpha.c Thu Oct 4 16:05:16 2001 @@ -108,11 +108,6 @@ init_IRQ(void) wrent(entInt, 0); alpha_mv.init_irq(); - - /* If we had wanted SRM console printk echoing early, undo it now. */ - if (alpha_using_srm && srmcons_output) { - unregister_srm_console(); - } } /* diff -rup 2.4.10-dist/arch/alpha/kernel/setup.c 2.4.10/arch/alpha/kernel/setup.c --- 2.4.10-dist/arch/alpha/kernel/setup.c Sun Aug 12 10:38:47 2001 +++ 2.4.10/arch/alpha/kernel/setup.c Thu Oct 4 16:05:16 2001 @@ -63,12 +63,20 @@ unsigned long srm_hae; /* Which processor we booted from. */ int boot_cpuid; -/* Using SRM callbacks for initial console output. This works from - setup_arch() time through the end of init_IRQ(), as those places - are under our control. - - By default, OFF; set it with a bootcommand arg of "srmcons". -*/ +/* + * Using SRM callbacks for initial console output. This works from + * setup_arch() time through the end of time_init(), as those places + * are under our (Alpha) control. + + * "srmcons" specified in the boot command arguments allows us to + * see kernel messages during the period of time before the true + * console device is "registered" during console_init(). As of this + * version (2.4.10), time_init() is the last Alpha-specific code + * called before console_init(), so we put "unregister" code + * there to prevent schizophrenic console behavior later... ;-} + * + * By default, OFF; set it with a bootcommand arg of "srmcons". + */ int srmcons_output = 0; /* Enforce a memory size limit; useful for testing. By default, none. */ diff -rup 2.4.10-dist/arch/alpha/kernel/time.c 2.4.10/arch/alpha/kernel/time.c --- 2.4.10-dist/arch/alpha/kernel/time.c Sun Aug 12 10:38:48 2001 +++ 2.4.10/arch/alpha/kernel/time.c Thu Oct 4 16:05:16 2001 @@ -332,6 +333,21 @@ time_init(void) alpha_mv.init_rtc(); do_get_fast_time = do_gettimeofday; + + /* + * If we had wanted SRM console printk echoing early, undo it now. + * + * "srmcons" specified in the boot command arguments allows us to + * see kernel messages during the period of time before the true + * console device is "registered" during console_init(). As of this + * version (2.4.10), time_init() is the last Alpha-specific code + * called before console_init(), so we put this "unregister" code + * here to prevent schizophrenic console behavior later... ;-} + */ + if (alpha_using_srm && srmcons_output) { + unregister_srm_console(); + srmcons_output = 0; + } } /* - 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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