1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 #ifndef _PPC64_PPC_ASM_H 3 #define _PPC64_PPC_ASM_H 4 /* 5 * 6 * Definitions used by various bits of low-level assembly code on PowerPC. 7 * 8 * Copyright (C) 1995-1999 Gary Thomas, Paul Mackerras, Cort Dougan. 9 */ 10 11 /* Condition Register Bit Fields */ 12 13 #define cr0 0 14 #define cr1 1 15 #define cr2 2 16 #define cr3 3 17 #define cr4 4 18 #define cr5 5 19 #define cr6 6 20 #define cr7 7 21 22 23 /* General Purpose Registers (GPRs) */ 24 25 #define r0 0 26 #define r1 1 27 #define r2 2 28 #define r3 3 29 #define r4 4 30 #define r5 5 31 #define r6 6 32 #define r7 7 33 #define r8 8 34 #define r9 9 35 #define r10 10 36 #define r11 11 37 #define r12 12 38 #define r13 13 39 #define r14 14 40 #define r15 15 41 #define r16 16 42 #define r17 17 43 #define r18 18 44 #define r19 19 45 #define r20 20 46 #define r21 21 47 #define r22 22 48 #define r23 23 49 #define r24 24 50 #define r25 25 51 #define r26 26 52 #define r27 27 53 #define r28 28 54 #define r29 29 55 #define r30 30 56 #define r31 31 57 58 #define SPRN_TBRL 268 59 #define SPRN_TBRU 269 60 #define SPRN_HSRR0 0x13A /* Hypervisor Save/Restore 0 */ 61 #define SPRN_HSRR1 0x13B /* Hypervisor Save/Restore 1 */ 62 63 #define MSR_LE 0x0000000000000001 64 65 #define FIXUP_ENDIAN \ 66 tdi 0,0,0x48; /* Reverse endian of b . + 8 */ \ 67 b $+44; /* Skip trampoline if endian is good */ \ 68 .long 0xa600607d; /* mfmsr r11 */ \ 69 .long 0x01006b69; /* xori r11,r11,1 */ \ 70 .long 0x00004039; /* li r10,0 */ \ 71 .long 0x6401417d; /* mtmsrd r10,1 */ \ 72 .long 0x05009f42; /* bcl 20,31,$+4 */ \ 73 .long 0xa602487d; /* mflr r10 */ \ 74 .long 0x14004a39; /* addi r10,r10,20 */ \ 75 .long 0xa6035a7d; /* mtsrr0 r10 */ \ 76 .long 0xa6037b7d; /* mtsrr1 r11 */ \ 77 .long 0x2400004c /* rfid */ 78 79 #ifdef CONFIG_PPC_8xx 80 #define MFTBL(dest) mftb dest 81 #define MFTBU(dest) mftbu dest 82 #else 83 #define MFTBL(dest) mfspr dest, SPRN_TBRL 84 #define MFTBU(dest) mfspr dest, SPRN_TBRU 85 #endif 86 87 #endif /* _PPC64_PPC_ASM_H */ 88