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[4/9] target/hppa: Fix PDC address translation on PA2.0 with PSW.W=0

Message ID 20240104183628.101366-5-deller@kernel.org (mailing list archive)
State New, archived
Headers show
Series target/hppa qemu v8.2 regression fixes | expand

Commit Message

Helge Deller Jan. 4, 2024, 6:36 p.m. UTC 
From: Helge Deller <deller@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.

Signed-off-by: Helge Deller <deller@gmx.de>
---
 target/hppa/mem_helper.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

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;