diff options
| author | Oliver O'Halloran <oohall@gmail.com> | 2019-08-02 18:00:03 +1000 |
|---|---|---|
| committer | Oliver O'Halloran <oohall@gmail.com> | 2019-08-16 15:51:55 +1000 |
| commit | b310e8f79e6817e18bd0e3c606da50a00b425ef0 (patch) | |
| tree | ce32f54dcd49d92af5e88bc7b849ee083187a820 /include | |
| parent | a36a49440f60d5e8a9f8f61885bb99b376f149c5 (diff) | |
| download | skiboot-b310e8f79e6817e18bd0e3c606da50a00b425ef0.zip skiboot-b310e8f79e6817e18bd0e3c606da50a00b425ef0.tar.gz skiboot-b310e8f79e6817e18bd0e3c606da50a00b425ef0.tar.bz2 | |
hw/phb4: Prevent register accesses when in reset
While the the ETU is in reset we cannot access any of the PHB registers.
If a PHB register is accessed via the XSCOM indirect interface then
we'll cause an ETU reset error which may prevent the PHB from being
re-initialised once the reset is lifted.
Prevent register accesses while in reset by adding a flag that is set
while the ETU reset bit is high and checking that flag in the XSCOM
(ASB) backdoor register access path.
Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/phb4.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/phb4.h b/include/phb4.h index af2e3ed..1c68ec2 100644 --- a/include/phb4.h +++ b/include/phb4.h @@ -151,6 +151,7 @@ struct phb4_err { #define PHB4_CFG_BLOCKED 0x00000004 #define PHB4_CAPP_RECOVERY 0x00000008 #define PHB4_CAPP_DISABLE 0x00000010 +#define PHB4_ETU_IN_RESET 0x00000020 struct phb4 { unsigned int index; /* 0..5 index inside p9 */ |