2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
6 * FPU context handling code for KVM.
8 * Copyright (C) 2015 Imagination Technologies Ltd.
12 #include <asm/asm-offsets.h>
13 #include <asm/fpregdef.h>
14 #include <asm/mipsregs.h>
15 #include <asm/regdef.h>
25 sll t0, t0, 5 # is Status.FR set?
26 bgez t0, 1f # no: skip odd doubles
28 sdc1 $f1, VCPU_FPR1(a0)
29 sdc1 $f3, VCPU_FPR3(a0)
30 sdc1 $f5, VCPU_FPR5(a0)
31 sdc1 $f7, VCPU_FPR7(a0)
32 sdc1 $f9, VCPU_FPR9(a0)
33 sdc1 $f11, VCPU_FPR11(a0)
34 sdc1 $f13, VCPU_FPR13(a0)
35 sdc1 $f15, VCPU_FPR15(a0)
36 sdc1 $f17, VCPU_FPR17(a0)
37 sdc1 $f19, VCPU_FPR19(a0)
38 sdc1 $f21, VCPU_FPR21(a0)
39 sdc1 $f23, VCPU_FPR23(a0)
40 sdc1 $f25, VCPU_FPR25(a0)
41 sdc1 $f27, VCPU_FPR27(a0)
42 sdc1 $f29, VCPU_FPR29(a0)
43 sdc1 $f31, VCPU_FPR31(a0)
44 1: sdc1 $f0, VCPU_FPR0(a0)
45 sdc1 $f2, VCPU_FPR2(a0)
46 sdc1 $f4, VCPU_FPR4(a0)
47 sdc1 $f6, VCPU_FPR6(a0)
48 sdc1 $f8, VCPU_FPR8(a0)
49 sdc1 $f10, VCPU_FPR10(a0)
50 sdc1 $f12, VCPU_FPR12(a0)
51 sdc1 $f14, VCPU_FPR14(a0)
52 sdc1 $f16, VCPU_FPR16(a0)
53 sdc1 $f18, VCPU_FPR18(a0)
54 sdc1 $f20, VCPU_FPR20(a0)
55 sdc1 $f22, VCPU_FPR22(a0)
56 sdc1 $f24, VCPU_FPR24(a0)
57 sdc1 $f26, VCPU_FPR26(a0)
58 sdc1 $f28, VCPU_FPR28(a0)
60 sdc1 $f30, VCPU_FPR30(a0)
64 LEAF(__kvm_restore_fpu)
69 sll t0, t0, 5 # is Status.FR set?
70 bgez t0, 1f # no: skip odd doubles
72 ldc1 $f1, VCPU_FPR1(a0)
73 ldc1 $f3, VCPU_FPR3(a0)
74 ldc1 $f5, VCPU_FPR5(a0)
75 ldc1 $f7, VCPU_FPR7(a0)
76 ldc1 $f9, VCPU_FPR9(a0)
77 ldc1 $f11, VCPU_FPR11(a0)
78 ldc1 $f13, VCPU_FPR13(a0)
79 ldc1 $f15, VCPU_FPR15(a0)
80 ldc1 $f17, VCPU_FPR17(a0)
81 ldc1 $f19, VCPU_FPR19(a0)
82 ldc1 $f21, VCPU_FPR21(a0)
83 ldc1 $f23, VCPU_FPR23(a0)
84 ldc1 $f25, VCPU_FPR25(a0)
85 ldc1 $f27, VCPU_FPR27(a0)
86 ldc1 $f29, VCPU_FPR29(a0)
87 ldc1 $f31, VCPU_FPR31(a0)
88 1: ldc1 $f0, VCPU_FPR0(a0)
89 ldc1 $f2, VCPU_FPR2(a0)
90 ldc1 $f4, VCPU_FPR4(a0)
91 ldc1 $f6, VCPU_FPR6(a0)
92 ldc1 $f8, VCPU_FPR8(a0)
93 ldc1 $f10, VCPU_FPR10(a0)
94 ldc1 $f12, VCPU_FPR12(a0)
95 ldc1 $f14, VCPU_FPR14(a0)
96 ldc1 $f16, VCPU_FPR16(a0)
97 ldc1 $f18, VCPU_FPR18(a0)
98 ldc1 $f20, VCPU_FPR20(a0)
99 ldc1 $f22, VCPU_FPR22(a0)
100 ldc1 $f24, VCPU_FPR24(a0)
101 ldc1 $f26, VCPU_FPR26(a0)
102 ldc1 $f28, VCPU_FPR28(a0)
104 ldc1 $f30, VCPU_FPR30(a0)
106 END(__kvm_restore_fpu)
108 LEAF(__kvm_restore_fcsr)
111 lw t0, VCPU_FCR31(a0)
113 * The ctc1 must stay at this offset in __kvm_restore_fcsr.
114 * See kvm_mips_csr_die_notify() which handles t0 containing a value
115 * which triggers an FP Exception, which must be stepped over and
116 * ignored since the set cause bits must remain there for the guest.
122 END(__kvm_restore_fcsr)