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I discovered the trouble... the bsp code (from my cpu vendor) wrongly writes out the irq_desc vector overwriting some vital kernel structure... best regards, luigi
Il martedì 23 settembre 2008 14:09:44 Luigi 'Comio' Mantellini ha scritto: > Hi List, > > I'm working on a 4Kec SoC. I'm trying to port a recent kernel (2.6.26-rcX > from trunk) to my SoC but I have problem on timers (i think). > > The start sequence (start_kernel @init/main.c) freezes on the > page_writeback_init() call. The page_writeback_init function calls the > lock_timer_base function (by means the mod_timer/__mod_timer) that fails > always the test likely(base!=NULL) (source file kernel/timer.c). The base > variable (ponter to tvec_base) is always NULL, resulting an infinite loop. > > I'm using the cevt-r4t and csrc-4k standard mips 4k timer (on irq #7). With > debugger I verified that the c0_compare_interrupt service routine is > correctly invoked. > > Kindly, can anyone help me to understand what I need to check to solve this > issue? If you need other information, please, ask me (This is my first mips > port). > > Thanks in advance. > > best regards. > > luigi -- Luigi Mantellini R&D - Software Industrie Dial Face S.p.A. Via Canzo, 4 20068 Peschiera Borromeo (MI), Italy Tel.: +39 02 5167 2813 Fax: +39 02 5167 2459 Email: luigi.mantellini@xxxxxxxxxxx |
