>From 716532d62cb1bf4087dc90c11b7e361cdcd28db4 Mon Sep 17 00:00:00 2001 From: Kumar Gala <[EMAIL PROTECTED]> Date: Fri, 16 May 2008 14:10:03 -0500 Subject: [PATCH v3] [POWERPC] Add a comment about the Book-e tophys/tovirt macros
The Book-E versions of tophys/tovirt are not simple noops to ensure compatibility with their "classic" ppc brethren. --- Lets try this version based on paul's feedback. include/asm-powerpc/ppc_asm.h | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-) diff --git a/include/asm-powerpc/ppc_asm.h b/include/asm-powerpc/ppc_asm.h index 2dbd4e7..5499c13 100644 --- a/include/asm-powerpc/ppc_asm.h +++ b/include/asm-powerpc/ppc_asm.h @@ -356,6 +356,12 @@ END_FTR_SECTION_IFCLR(CPU_FTR_601) #define toreal(rd) #define fromreal(rd) +/* + * We use addis to ensure compatibility with the "classic" ppc versions of + * these macros. use rs = 0 to get the tophys offset in rd, rather than + * converting the address in r0, and so this version has to do that too + * (i.e. set register rd to 0 when rs == 0) + */ #define tophys(rd,rs) \ addis rd,rs,0 -- 1.5.4.5 _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev