summaryrefslogtreecommitdiff
path: root/arch/parisc
diff options
context:
space:
mode:
authorHelge Deller <deller@gmx.de>2024-01-03 23:02:16 +0300
committerHelge Deller <deller@gmx.de>2024-01-08 00:59:16 +0300
commit735ae74f73e55c191d48689bd11ff4a06ea0508f (patch)
treec13041f4b590b4b6266c9a916e3cd5b7dfc6cdff /arch/parisc
parent0dd3ee31125508cd67f7e7172247f05b7fd1753a (diff)
downloadlinux-735ae74f73e55c191d48689bd11ff4a06ea0508f.tar.xz
parisc/firmware: Fix F-extend for PDC addresses
When running with narrow firmware (64-bit kernel using a 32-bit firmware), extend PDC addresses into the 0xfffffff0.00000000 region instead of the 0xf0f0f0f0.00000000 region. This fixes the power button on the C3700 machine in qemu (64-bit CPU with 32-bit firmware), and my assumption is that the previous code was really never used (because most 64-bit machines have a 64-bit firmware), or it just worked on very old machines because they may only decode 40-bit of virtual addresses. Cc: stable@vger.kernel.org Signed-off-by: Helge Deller <deller@gmx.de>
Diffstat (limited to 'arch/parisc')
-rw-r--r--arch/parisc/kernel/firmware.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/parisc/kernel/firmware.c b/arch/parisc/kernel/firmware.c
index 904ca3b9e7a7..c69f6d5946e9 100644
--- a/arch/parisc/kernel/firmware.c
+++ b/arch/parisc/kernel/firmware.c
@@ -123,10 +123,10 @@ static unsigned long f_extend(unsigned long address)
#ifdef CONFIG_64BIT
if(unlikely(parisc_narrow_firmware)) {
if((address & 0xff000000) == 0xf0000000)
- return 0xf0f0f0f000000000UL | (u32)address;
+ return (0xfffffff0UL << 32) | (u32)address;
if((address & 0xf0000000) == 0xf0000000)
- return 0xffffffff00000000UL | (u32)address;
+ return (0xffffffffUL << 32) | (u32)address;
}
#endif
return address;