From: Helge Deller <del...@gmx.de> 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 <del...@gmx.de> Tested-by: Bruno Haible <br...@clisp.org> --- target/hppa/mem_helper.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/target/hppa/mem_helper.c b/target/hppa/mem_helper.c index 08abd1a9f9..011b192406 100644 --- a/target/hppa/mem_helper.c +++ b/target/hppa/mem_helper.c @@ -56,7 +56,7 @@ hwaddr hppa_abs_to_phys_pa2_w0(vaddr addr) addr = (int32_t)addr; } else { /* PDC address space */ - addr &= MAKE_64BIT_MASK(0, 24); + addr = (uint32_t)addr; addr |= -1ull << (TARGET_PHYS_ADDR_SPACE_BITS - 4); } return addr; -- 2.43.0
