From fee3c55d7fb9486f02d3285678d58e433ffe3c2a Mon Sep 17 00:00:00 2001 From: Michal Simek Date: Fri, 29 May 2009 14:15:33 +0200 Subject: [PATCH] microblaze: Fix problem with early_printk in startup Problem arise when is incopatibility between kernel/dts/pvr and kernel tries to announce it. Early printk device (uartlite in our case) was in TLB 2 and when kernel extract DTB it necessary to allocate at least one TLB at the end of memory. First free TLB was number two where was early printk. But checking mechanism (kernel/dts/pvr) was after extrahing but TLB 2 was different. This caused that kernel hung up. Moving early printk device to TLB 63 solve it and we don't protect it which means that we can use early_printk messages only for initial parts of kernel then we rewrite TLB 63. Reported-by: Edgar E. Iglesias Signed-off-by: Michal Simek --- arch/microblaze/kernel/misc.S | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/microblaze/kernel/misc.S b/arch/microblaze/kernel/misc.S index d623efc9083c..df16c6287a8e 100644 --- a/arch/microblaze/kernel/misc.S +++ b/arch/microblaze/kernel/misc.S @@ -69,7 +69,7 @@ early_console_reg_tlb_alloc: * Load a TLB entry for the UART, so that microblaze_progress() can use * the UARTs nice and early. We use a 4k real==virtual mapping. */ - ori r4, r0, 2 + ori r4, r0, 63 mts rtlbx, r4 /* TLB slot 2 */ or r4,r5,r0