| /* 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 |
| |
| .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_pointer) |
| PPC_LL r3,0(r1) |
| blr |
| EXPORT_SYMBOL(current_stack_pointer) |
