/* * This file contains miscellaneous low-level functions. * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org) * * Largely rewritten by Cort Dougan (cort@cs.nmt.edu) * and Paul Mackerras. * * Adapted for iSeries by Mike Corrigan (mikejc@us.ibm.com) * PPC64 updates by Dave Engebretsen (engebret@us.ibm.com) * * setjmp/longjmp code by Paul Mackerras. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #include <asm/ppc_asm.h> #include <asm/unistd.h> #include <asm/asm-compat.h> #include <asm/asm-offsets.h> .text /* * Returns (address we are running at) - (address we were linked at) * for use before the text and data are mapped to KERNELBASE. */ _GLOBAL(reloc_offset) mflr r0 bl 1f 1: mflr r3 PPC_LL r4,(2f-1b)(r3) subf r3,r4,r3 mtlr r0 blr .align 3 2: PPC_LONG 1b /* * add_reloc_offset(x) returns x + reloc_offset(). */ _GLOBAL(add_reloc_offset) mflr r0 bl 1f 1: mflr r5 PPC_LL r4,(2f-1b)(r5) subf r5,r4,r5 add r3,r3,r5 mtlr r0 blr .align 3 2: PPC_LONG 1b _GLOBAL(kernel_execve) li r0,__NR_execve sc bnslr neg r3,r3 blr _GLOBAL(setjmp) mflr r0 PPC_STL r0,0(r3) PPC_STL r1,SZL(r3) PPC_STL r2,2*SZL(r3) mfcr r0 PPC_STL r0,3*SZL(r3) PPC_STL r13,4*SZL(r3) PPC_STL r14,5*SZL(r3) PPC_STL r15,6*SZL(r3) PPC_STL r16,7*SZL(r3) PPC_STL r17,8*SZL(r3) PPC_STL r18,9*SZL(r3) PPC_STL r19,10*SZL(r3) PPC_STL r20,11*SZL(r3) PPC_STL r21,12*SZL(r3) PPC_STL r22,13*SZL(r3) PPC_STL r23,14*SZL(r3) PPC_STL r24,15*SZL(r3) PPC_STL r25,16*SZL(r3) PPC_STL r26,17*SZL(r3) PPC_STL r27,18*SZL(r3) PPC_STL r28,19*SZL(r3) PPC_STL r29,20*SZL(r3) PPC_STL r30,21*SZL(r3) PPC_STL r31,22*SZL(r3) li r3,0 blr _GLOBAL(longjmp) PPC_LCMPI r4,0 bne 1f li r4,1 1: PPC_LL r13,4*SZL(r3) PPC_LL r14,5*SZL(r3) PPC_LL r15,6*SZL(r3) PPC_LL r16,7*SZL(r3) PPC_LL r17,8*SZL(r3) PPC_LL r18,9*SZL(r3) PPC_LL r19,10*SZL(r3) PPC_LL r20,11*SZL(r3) PPC_LL r21,12*SZL(r3) PPC_LL r22,13*SZL(r3) PPC_LL r23,14*SZL(r3) PPC_LL r24,15*SZL(r3) PPC_LL r25,16*SZL(r3) PPC_LL r26,17*SZL(r3) PPC_LL r27,18*SZL(r3) PPC_LL r28,19*SZL(r3) PPC_LL r29,20*SZL(r3) PPC_LL r30,21*SZL(r3) PPC_LL r31,22*SZL(r3) PPC_LL r0,3*SZL(r3) mtcrf 0x38,r0 PPC_LL r0,0(r3) PPC_LL r1,SZL(r3) PPC_LL r2,2*SZL(r3) mtlr r0 mr r3,r4 blr _GLOBAL(__setup_cpu_power7) _GLOBAL(__restore_cpu_power7) /* place holder */ blr