On Dec 10, 2009, at 9:28 PM, David Gibson wrote: > On Thu, Dec 10, 2009 at 08:41:53PM -0600, Kumar Gala wrote: > [snip] >>> +#define DBCR1_USER_DEBUG (DBCR1_IAC12M | DBCR1_IAC34M) >>> +#define DBCR1_BASE_REG_VALUE (DBCR1_IAC1US | DBCR1_IAC1ER_10 | \ >>> + DBCR1_IAC2US | DBCR1_IAC2ER_10 | \ >>> + DBCR1_IAC3US | DBCR1_IAC3ER_10 | \ >>> + DBCR1_IAC4US | DBCR1_IAC4ER_10) >> >> We are we using MSR[IS] IS=0, why not just any Eff address? In the >> future we might have user as IS = 1, and kernel as IS = 0. > > Since the user can't control that directly, we can update this when > and if we change our use of address spaces.
That's such a subtle issue (easy to forgot about and miss in the future). Why do we need this now? - k _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
