From add60ef303809087999412209d24d400a1c96670 Mon Sep 17 00:00:00 2001 From: Olaf Hering Date: Thu, 23 Mar 2006 22:03:57 +0100 Subject: [PATCH] [PATCH] powerpc: return to OF via trap, not exit Do not call prom exit prom_panic. It clears the screen and the exit message is lost. On some (or all?) pmacs it causes another crash when OF tries to print the date and time in its banner. Set of_platform earlier to catch more prom_panic() calls. Signed-off-by: Olaf Hering Acked-by: Segher Boessenkool Signed-off-by: Paul Mackerras --- arch/powerpc/kernel/prom_init.c | 23 ++++++++++++++--------- 1 file changed, 14 insertions(+), 9 deletions(-) diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c index 813c2cd194c2..0d0887844501 100644 --- a/arch/powerpc/kernel/prom_init.c +++ b/arch/powerpc/kernel/prom_init.c @@ -397,6 +397,11 @@ static void __init __attribute__((noreturn)) prom_panic(const char *reason) reason = PTRRELOC(reason); #endif prom_print(reason); + /* Do not call exit because it clears the screen on pmac + * it also causes some sort of double-fault on early pmacs */ + if (RELOC(of_platform) == PLATFORM_POWERMAC) + asm("trap\n"); + /* ToDo: should put up an SRC here on p/iSeries */ call_prom("exit", 0, 0); @@ -2060,15 +2065,6 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4, */ prom_init_stdout(); - /* Bail if this is a kdump kernel. */ - if (PHYSICAL_START > 0) - prom_panic("Error: You can't boot a kdump kernel from OF!\n"); - - /* - * Check for an initrd - */ - prom_check_initrd(r3, r4); - /* * Get default machine type. At this point, we do not differentiate * between pSeries SMP and pSeries LPAR @@ -2078,6 +2074,15 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4, prom_setprop(_prom->chosen, "/chosen", "linux,platform", &getprop_rval, sizeof(getprop_rval)); + /* Bail if this is a kdump kernel. */ + if (PHYSICAL_START > 0) + prom_panic("Error: You can't boot a kdump kernel from OF!\n"); + + /* + * Check for an initrd + */ + prom_check_initrd(r3, r4); + #ifdef CONFIG_PPC_PSERIES /* * On pSeries, inform the firmware about our capabilities -- GitLab