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6ce18d5306
Fix the address translation for PDC space on PA2.0 if PSW.W=0. Basically, for any address in the 32-bit PDC range from 0xf0000000 to 0xf1000000 keep the lower 32-bits and just set the upper 32-bits to 0xfffffff0. This mapping fixes the emulated power button in PDC space for 32- and 64-bit machines and is how the physical C3700 machine seems to map PDC. Figures H-10 and H-11 in the parisc2.0 spec [1] show that the 32-bit region will be mapped somewhere into a higher and bigger 64-bit PDC space. The start and end of this 64-bit space is defined by the physical address bits. But the figures don't specifiy where exactly the mapping will start inside that region. Tests on a real HP C3700 regarding the address of the power button indicate, that the lower 32-bits will stay the same though. [1] https://parisc.wiki.kernel.org/images-parisc/7/73/Parisc2.0.pdf Signed-off-by: Helge Deller <deller@gmx.de> Tested-by: Bruno Haible <bruno@clisp.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> |
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