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118 lines
2.3 KiB
118 lines
2.3 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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/* |
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* This file contains miscellaneous low-level functions. |
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* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org) |
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* |
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* Largely rewritten by Cort Dougan (cort@cs.nmt.edu) |
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* and Paul Mackerras. |
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* |
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* PPC64 updates by Dave Engebretsen (engebret@us.ibm.com) |
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* |
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* setjmp/longjmp code by Paul Mackerras. |
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*/ |
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#include <asm/ppc_asm.h> |
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#include <asm/unistd.h> |
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#include <asm/asm-compat.h> |
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#include <asm/asm-offsets.h> |
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#include <asm/export.h> |
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.text |
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/* |
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* Returns (address we are running at) - (address we were linked at) |
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* for use before the text and data are mapped to KERNELBASE. |
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* add_reloc_offset(x) returns x + reloc_offset(). |
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*/ |
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_GLOBAL(reloc_offset) |
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li r3, 0 |
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_GLOBAL(add_reloc_offset) |
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mflr r0 |
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bcl 20,31,$+4 |
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1: mflr r5 |
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PPC_LL r4,(2f-1b)(r5) |
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subf r5,r4,r5 |
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add r3,r3,r5 |
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mtlr r0 |
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blr |
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_ASM_NOKPROBE_SYMBOL(reloc_offset) |
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_ASM_NOKPROBE_SYMBOL(add_reloc_offset) |
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.align 3 |
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2: PPC_LONG 1b |
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_GLOBAL(setjmp) |
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mflr r0 |
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PPC_STL r0,0(r3) |
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PPC_STL r1,SZL(r3) |
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PPC_STL r2,2*SZL(r3) |
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#ifdef CONFIG_PPC32 |
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mfcr r12 |
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stmw r12, 3*SZL(r3) |
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#else |
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mfcr r0 |
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PPC_STL r0,3*SZL(r3) |
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PPC_STL r13,4*SZL(r3) |
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PPC_STL r14,5*SZL(r3) |
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PPC_STL r15,6*SZL(r3) |
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PPC_STL r16,7*SZL(r3) |
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PPC_STL r17,8*SZL(r3) |
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PPC_STL r18,9*SZL(r3) |
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PPC_STL r19,10*SZL(r3) |
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PPC_STL r20,11*SZL(r3) |
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PPC_STL r21,12*SZL(r3) |
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PPC_STL r22,13*SZL(r3) |
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PPC_STL r23,14*SZL(r3) |
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PPC_STL r24,15*SZL(r3) |
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PPC_STL r25,16*SZL(r3) |
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PPC_STL r26,17*SZL(r3) |
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PPC_STL r27,18*SZL(r3) |
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PPC_STL r28,19*SZL(r3) |
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PPC_STL r29,20*SZL(r3) |
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PPC_STL r30,21*SZL(r3) |
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PPC_STL r31,22*SZL(r3) |
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#endif |
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li r3,0 |
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blr |
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_GLOBAL(longjmp) |
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#ifdef CONFIG_PPC32 |
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lmw r12, 3*SZL(r3) |
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mtcrf 0x38, r12 |
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#else |
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PPC_LL r13,4*SZL(r3) |
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PPC_LL r14,5*SZL(r3) |
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PPC_LL r15,6*SZL(r3) |
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PPC_LL r16,7*SZL(r3) |
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PPC_LL r17,8*SZL(r3) |
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PPC_LL r18,9*SZL(r3) |
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PPC_LL r19,10*SZL(r3) |
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PPC_LL r20,11*SZL(r3) |
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PPC_LL r21,12*SZL(r3) |
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PPC_LL r22,13*SZL(r3) |
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PPC_LL r23,14*SZL(r3) |
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PPC_LL r24,15*SZL(r3) |
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PPC_LL r25,16*SZL(r3) |
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PPC_LL r26,17*SZL(r3) |
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PPC_LL r27,18*SZL(r3) |
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PPC_LL r28,19*SZL(r3) |
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PPC_LL r29,20*SZL(r3) |
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PPC_LL r30,21*SZL(r3) |
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PPC_LL r31,22*SZL(r3) |
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PPC_LL r0,3*SZL(r3) |
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mtcrf 0x38,r0 |
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#endif |
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PPC_LL r0,0(r3) |
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PPC_LL r1,SZL(r3) |
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PPC_LL r2,2*SZL(r3) |
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mtlr r0 |
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mr. r3, r4 |
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bnelr |
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li r3, 1 |
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blr |
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_GLOBAL(current_stack_frame) |
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PPC_LL r3,0(r1) |
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blr |
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EXPORT_SYMBOL(current_stack_frame)
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