aeee512d17
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>
(cherry picked from commit
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| edk2@b8a3eec88c | ||
| ipxe@4bd064de23 | ||
| openbios@af97fd7af5 | ||
| opensbi@057eb10b6d | ||
| qboot@8ca302e86d | ||
| qemu-palcode@99d9b4dcf2 | ||
| QemuMacDrivers@90c488d5f4 | ||
| seabios@a6ed6b701f | ||
| seabios-hppa@e4eac85880 | ||
| skiboot@24a7eb3596 | ||
| SLOF@3a259df244 | ||
| u-boot@840658b093 | ||
| u-boot-sam460ex@60b3916f33 | ||
| vbootrom@0c37a43527 | ||
| config.seabios-128k | ||
| config.seabios-256k | ||
| config.seabios-microvm | ||
| config.vga-ati | ||
| config.vga-bochs-display | ||
| config.vga-cirrus | ||
| config.vga-isavga | ||
| config.vga-qxl | ||
| config.vga-ramfb | ||
| config.vga-stdvga | ||
| config.vga-virtio | ||
| config.vga-vmware | ||
| configure-seabios.sh | ||
| edk2-build.config | ||
| edk2-build.py | ||
| Makefile | ||