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130 lines
2.8 KiB
130 lines
2.8 KiB
/* |
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* This file is subject to the terms and conditions of the GNU General Public |
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* License. See the file "COPYING" in the main directory of this archive |
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* for more details. |
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* |
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* Copyright (C) 1996, 1998 by Ralf Baechle |
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* |
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* Multi-arch abstraction and asm macros for easier reading: |
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* Copyright (C) 1996 David S. Miller (davem@davemloft.net) |
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* |
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* Further modifications to make this work: |
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* Copyright (c) 1998 Harald Koerfgen |
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*/ |
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#include <asm/asm.h> |
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#include <asm/asmmacro.h> |
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#include <asm/errno.h> |
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#include <asm/export.h> |
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#include <asm/fpregdef.h> |
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#include <asm/mipsregs.h> |
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#include <asm/asm-offsets.h> |
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#include <asm/regdef.h> |
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#define EX(a,b) \ |
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9: a,##b; \ |
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.section __ex_table,"a"; \ |
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PTR 9b,fault; \ |
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.previous |
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#define EX2(a,b) \ |
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9: a,##b; \ |
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.section __ex_table,"a"; \ |
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PTR 9b,bad_stack; \ |
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PTR 9b+4,bad_stack; \ |
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.previous |
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.set mips1 |
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/* |
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* Save a thread's fp context. |
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*/ |
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LEAF(_save_fp) |
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EXPORT_SYMBOL(_save_fp) |
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fpu_save_single a0, t1 # clobbers t1 |
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jr ra |
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END(_save_fp) |
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/* |
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* Restore a thread's fp context. |
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*/ |
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LEAF(_restore_fp) |
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fpu_restore_single a0, t1 # clobbers t1 |
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jr ra |
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END(_restore_fp) |
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.set noreorder |
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/** |
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* _save_fp_context() - save FP context from the FPU |
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* @a0 - pointer to fpregs field of sigcontext |
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* @a1 - pointer to fpc_csr field of sigcontext |
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* |
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* Save FP context, including the 32 FP data registers and the FP |
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* control & status register, from the FPU to signal context. |
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*/ |
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LEAF(_save_fp_context) |
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.set push |
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SET_HARDFLOAT |
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li v0, 0 # assume success |
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cfc1 t1, fcr31 |
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EX2(s.d $f0, 0(a0)) |
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EX2(s.d $f2, 16(a0)) |
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EX2(s.d $f4, 32(a0)) |
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EX2(s.d $f6, 48(a0)) |
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EX2(s.d $f8, 64(a0)) |
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EX2(s.d $f10, 80(a0)) |
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EX2(s.d $f12, 96(a0)) |
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EX2(s.d $f14, 112(a0)) |
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EX2(s.d $f16, 128(a0)) |
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EX2(s.d $f18, 144(a0)) |
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EX2(s.d $f20, 160(a0)) |
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EX2(s.d $f22, 176(a0)) |
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EX2(s.d $f24, 192(a0)) |
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EX2(s.d $f26, 208(a0)) |
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EX2(s.d $f28, 224(a0)) |
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EX2(s.d $f30, 240(a0)) |
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jr ra |
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EX(sw t1, (a1)) |
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.set pop |
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END(_save_fp_context) |
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/** |
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* _restore_fp_context() - restore FP context to the FPU |
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* @a0 - pointer to fpregs field of sigcontext |
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* @a1 - pointer to fpc_csr field of sigcontext |
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* |
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* Restore FP context, including the 32 FP data registers and the FP |
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* control & status register, from signal context to the FPU. |
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*/ |
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LEAF(_restore_fp_context) |
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.set push |
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SET_HARDFLOAT |
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li v0, 0 # assume success |
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EX(lw t0, (a1)) |
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EX2(l.d $f0, 0(a0)) |
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EX2(l.d $f2, 16(a0)) |
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EX2(l.d $f4, 32(a0)) |
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EX2(l.d $f6, 48(a0)) |
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EX2(l.d $f8, 64(a0)) |
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EX2(l.d $f10, 80(a0)) |
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EX2(l.d $f12, 96(a0)) |
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EX2(l.d $f14, 112(a0)) |
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EX2(l.d $f16, 128(a0)) |
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EX2(l.d $f18, 144(a0)) |
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EX2(l.d $f20, 160(a0)) |
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EX2(l.d $f22, 176(a0)) |
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EX2(l.d $f24, 192(a0)) |
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EX2(l.d $f26, 208(a0)) |
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EX2(l.d $f28, 224(a0)) |
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EX2(l.d $f30, 240(a0)) |
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jr ra |
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ctc1 t0, fcr31 |
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.set pop |
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END(_restore_fp_context) |
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.set reorder |
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.type fault, @function |
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.ent fault |
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fault: li v0, -EFAULT |
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jr ra |
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.end fault
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