Here is a series of patches to bring the excite platform up to date. In order to achieve this, I had to apply a couple of changes to some non-platform code as well: Patch 1/4: This one introduces a new configuration parameter named GPI_RM9000, used to enable devices that depend on RM9000-style GPI hardware. This is a re-submit, I submitted this patch before, but it has not been applied yet. Patch 2/4: The RM9000 hazards in include/asm-mips/hazards.h were apparently wrong; I could not get c0_compare_int_usable() in arch/mips/kernel/cevt-r4k.c to work. The RM9122 manual says, "When a CP0 register is changed by an MTC0 or CTC0 instruction, the contents of the changed register must not be used for 4 cycles after the MTC0 or CTC0 is issued. Specifically, if a CP0 register is loaded, its contents must not be read back or otherwise used until 4 cycles later." I guess this also covers the case of observing the result of writing to a CP0 register by reading the contents of another CP0 register, as in this case. Patch 3/4: Since the excite platform uses the RM9000's alternate timer interrupt, I had to rework the compare interrupt setup. I changed the existing get_c0_compare_int() hook to be called earlier than before, so that cp0_compare_irq contains the correct value right from the start, and functions like c0_compare_int_pending() and c0_compare_int_usable() continue to function without any need for modifications. Then I added a get_c0_perfcounter_int() hook to complement it. I also did some minor modifications, like adding 'const' in some places, and outputting an error message if the compare interrupt is found to be non-functional, a condition that certainly deserves such a message. Since the get_c0_compare_int() hook is used in arch/mips/mips-boards/generic/time.c, users of this file might theoretically be affected by this change. I do not have access to these boards, so I could not check, however, I believe the change does not cause any breakage here. Patch 4/4: Finally, the excite platform has to supply the alternate compare irq, which this patch is for. tk -- _______________________________ Thomas Köller, Software Developer Basler Vision Technologies An der Strusbek 60-62 22926 Ahrensburg Germany Tel. +49 (0) 4102 - 463 390 Fax +49 (0) 4102 - 463 390 mailto:thomas.koeller@xxxxxxxxxxxxx http://www.baslerweb.com Vorstand: Dr.-Ing. Dietmar Ley (Vorsitzender) · John P. Jennings · Peter Krumhoff · Aufsichtsratsvorsitzender: Norbert Basler Basler AG · Amtsgericht Ahrensburg HRB 4090 · Ust-IdNr.: DE 135 098 121 · Steuer-Nr.: 30 292 04497 _______________________________
