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| /* SPDX-License-Identifier: GPL-2.0-or-later */
| /*
| * 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.
| *
| * PPC64 updates by Dave Engebretsen (engebret@us.ibm.com)
| *
| * setjmp/longjmp code by Paul Mackerras.
| */
| #include <asm/ppc_asm.h>
| #include <asm/unistd.h>
| #include <asm/asm-compat.h>
| #include <asm/asm-offsets.h>
| #include <asm/export.h>
|
| .text
|
| /*
| * Returns (address we are running at) - (address we were linked at)
| * for use before the text and data are mapped to KERNELBASE.
|
| * add_reloc_offset(x) returns x + reloc_offset().
| */
|
| _GLOBAL(reloc_offset)
| li r3, 0
| _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
| _ASM_NOKPROBE_SYMBOL(reloc_offset)
| _ASM_NOKPROBE_SYMBOL(add_reloc_offset)
|
| .align 3
| 2: PPC_LONG 1b
|
| _GLOBAL(setjmp)
| mflr r0
| PPC_STL r0,0(r3)
| PPC_STL r1,SZL(r3)
| PPC_STL r2,2*SZL(r3)
| #ifdef CONFIG_PPC32
| mfcr r12
| stmw r12, 3*SZL(r3)
| #else
| 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)
| #endif
| li r3,0
| blr
|
| _GLOBAL(longjmp)
| #ifdef CONFIG_PPC32
| lmw r12, 3*SZL(r3)
| mtcrf 0x38, r12
| #else
| 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
| #endif
| PPC_LL r0,0(r3)
| PPC_LL r1,SZL(r3)
| PPC_LL r2,2*SZL(r3)
| mtlr r0
| mr. r3, r4
| bnelr
| li r3, 1
| blr
|
| _GLOBAL(current_stack_frame)
| PPC_LL r3,0(r1)
| blr
| EXPORT_SYMBOL(current_stack_frame)
|
|
