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"PowerPC Processor binding to: IEEE 1275-1994, Standard for Boot (Initialization, Configuration) Firmware Revision: 2.1 (Approved Version), November 6, 1996" 7.1 Calling Convention: Client interface preserves: msr, cr, r1, r2, r13-r31, sprg0-3, fpscr, f0-f31, sr0-sr15, other SPRs. This patch modifies of_client_callback(), to preserve r1, r2, r4-r31. This is needed to be able to execute the first stage of quik which supposes r7 is unmodified. git-svn-id: svn://coreboot.org/openbios/openbios-devel@384 f158a5a8-5612-0410-a976-696ce0be7e32