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| 2 | |
| 3 | * arch/arm/include/asm/fpstate.h
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| 4 | *
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| 5 | * Copyright (C) 1995 Russell King
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| 6 |
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| 7 |
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| 8 | #ifndef __ASM_ARM_FPSTATE_H
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| 9 | #define __ASM_ARM_FPSTATE_H
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| 10 |
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| 11 |
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| 12 | #ifndef __ASSEMBLY__
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| 13 |
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| 14 | |
| 15 | * VFP storage area has:
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| 16 | * - FPEXC, FPSCR, FPINST and FPINST2.
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| 17 | * - 16 or 32 double precision data registers
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| 18 | * - an implementation-dependent word of state for FLDMX/FSTMX (pre-ARMv6)
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| 19 | *
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| 20 | * FPEXC will always be non-zero once the VFP has been used in this process.
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| 21 |
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| 22 |
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| 23 | struct vfp_hard_struct {
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| 24 | #ifdef CONFIG_VFPv3
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| 25 | __u64 fpregs[32];
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| 26 | #else
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| 27 | __u64 fpregs[16];
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| 28 | #endif
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| 29 | #if __LINUX_ARM_ARCH__ < 6
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| 30 | __u32 fpmx_state;
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| 31 | #endif
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| 32 | __u32 fpexc;
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| 33 | __u32 fpscr;
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| 34 | |
| 35 | * VFP implementation specific state
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| 36 |
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| 37 | __u32 fpinst;
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| 38 | __u32 fpinst2;
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| 39 |
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| 40 | #ifdef CONFIG_SMP
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| 41 | __u32 cpu;
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| 42 | #endif
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| 43 | };
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| 44 |
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| 45 | union vfp_state {
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| 46 | struct vfp_hard_struct hard;
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| 47 | };
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| 48 |
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| 49 | #define FP_HARD_SIZE 35
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| 50 |
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| 51 | struct fp_hard_struct {
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| 52 | unsigned int save[FP_HARD_SIZE];
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| 53 | };
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| 54 |
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| 55 | #define FP_SOFT_SIZE 35
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| 56 |
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| 57 | struct fp_soft_struct {
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| 58 | unsigned int save[FP_SOFT_SIZE];
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| 59 | };
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| 60 |
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| 61 | #define IWMMXT_SIZE 0x98
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| 62 |
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| 63 | struct iwmmxt_struct {
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| 64 | unsigned int save[IWMMXT_SIZE / sizeof(unsigned int)];
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| 65 | };
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| 66 |
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| 67 | union fp_state {
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| 68 | struct fp_hard_struct hard;
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| 69 | struct fp_soft_struct soft;
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| 70 | #ifdef CONFIG_IWMMXT
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| 71 | struct iwmmxt_struct iwmmxt;
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| 72 | #endif
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| 73 | };
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| 74 |
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| 75 | #define FP_SIZE (sizeof(union fp_state) / sizeof(int))
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| 76 |
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| 77 | #endif
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| 78 |
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| 79 | #endif
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