| /* |
| * This file is subject to the terms and conditions of the GNU General Public |
| * License. See the file "COPYING" in the main directory of this archive |
| * for more details. |
| * |
| * FPU context handling code for KVM. |
| * |
| * Copyright (C) 2015 Imagination Technologies Ltd. |
| */ |
| |
| #include <asm/asm.h> |
| #include <asm/asm-offsets.h> |
| #include <asm/fpregdef.h> |
| #include <asm/mipsregs.h> |
| #include <asm/regdef.h> |
| |
| /* preprocessor replaces the fp in ".set fp=64" with $30 otherwise */ |
| #undef fp |
| |
| .set noreorder |
| .set noat |
| |
| LEAF(__kvm_save_fpu) |
| .set push |
| SET_HARDFLOAT |
| .set fp=64 |
| mfc0 t0, CP0_STATUS |
| sll t0, t0, 5 # is Status.FR set? |
| bgez t0, 1f # no: skip odd doubles |
| nop |
| sdc1 $f1, VCPU_FPR1(a0) |
| sdc1 $f3, VCPU_FPR3(a0) |
| sdc1 $f5, VCPU_FPR5(a0) |
| sdc1 $f7, VCPU_FPR7(a0) |
| sdc1 $f9, VCPU_FPR9(a0) |
| sdc1 $f11, VCPU_FPR11(a0) |
| sdc1 $f13, VCPU_FPR13(a0) |
| sdc1 $f15, VCPU_FPR15(a0) |
| sdc1 $f17, VCPU_FPR17(a0) |
| sdc1 $f19, VCPU_FPR19(a0) |
| sdc1 $f21, VCPU_FPR21(a0) |
| sdc1 $f23, VCPU_FPR23(a0) |
| sdc1 $f25, VCPU_FPR25(a0) |
| sdc1 $f27, VCPU_FPR27(a0) |
| sdc1 $f29, VCPU_FPR29(a0) |
| sdc1 $f31, VCPU_FPR31(a0) |
| 1: sdc1 $f0, VCPU_FPR0(a0) |
| sdc1 $f2, VCPU_FPR2(a0) |
| sdc1 $f4, VCPU_FPR4(a0) |
| sdc1 $f6, VCPU_FPR6(a0) |
| sdc1 $f8, VCPU_FPR8(a0) |
| sdc1 $f10, VCPU_FPR10(a0) |
| sdc1 $f12, VCPU_FPR12(a0) |
| sdc1 $f14, VCPU_FPR14(a0) |
| sdc1 $f16, VCPU_FPR16(a0) |
| sdc1 $f18, VCPU_FPR18(a0) |
| sdc1 $f20, VCPU_FPR20(a0) |
| sdc1 $f22, VCPU_FPR22(a0) |
| sdc1 $f24, VCPU_FPR24(a0) |
| sdc1 $f26, VCPU_FPR26(a0) |
| sdc1 $f28, VCPU_FPR28(a0) |
| jr ra |
| sdc1 $f30, VCPU_FPR30(a0) |
| .set pop |
| END(__kvm_save_fpu) |
| |
| LEAF(__kvm_restore_fpu) |
| .set push |
| SET_HARDFLOAT |
| .set fp=64 |
| mfc0 t0, CP0_STATUS |
| sll t0, t0, 5 # is Status.FR set? |
| bgez t0, 1f # no: skip odd doubles |
| nop |
| ldc1 $f1, VCPU_FPR1(a0) |
| ldc1 $f3, VCPU_FPR3(a0) |
| ldc1 $f5, VCPU_FPR5(a0) |
| ldc1 $f7, VCPU_FPR7(a0) |
| ldc1 $f9, VCPU_FPR9(a0) |
| ldc1 $f11, VCPU_FPR11(a0) |
| ldc1 $f13, VCPU_FPR13(a0) |
| ldc1 $f15, VCPU_FPR15(a0) |
| ldc1 $f17, VCPU_FPR17(a0) |
| ldc1 $f19, VCPU_FPR19(a0) |
| ldc1 $f21, VCPU_FPR21(a0) |
| ldc1 $f23, VCPU_FPR23(a0) |
| ldc1 $f25, VCPU_FPR25(a0) |
| ldc1 $f27, VCPU_FPR27(a0) |
| ldc1 $f29, VCPU_FPR29(a0) |
| ldc1 $f31, VCPU_FPR31(a0) |
| 1: ldc1 $f0, VCPU_FPR0(a0) |
| ldc1 $f2, VCPU_FPR2(a0) |
| ldc1 $f4, VCPU_FPR4(a0) |
| ldc1 $f6, VCPU_FPR6(a0) |
| ldc1 $f8, VCPU_FPR8(a0) |
| ldc1 $f10, VCPU_FPR10(a0) |
| ldc1 $f12, VCPU_FPR12(a0) |
| ldc1 $f14, VCPU_FPR14(a0) |
| ldc1 $f16, VCPU_FPR16(a0) |
| ldc1 $f18, VCPU_FPR18(a0) |
| ldc1 $f20, VCPU_FPR20(a0) |
| ldc1 $f22, VCPU_FPR22(a0) |
| ldc1 $f24, VCPU_FPR24(a0) |
| ldc1 $f26, VCPU_FPR26(a0) |
| ldc1 $f28, VCPU_FPR28(a0) |
| jr ra |
| ldc1 $f30, VCPU_FPR30(a0) |
| .set pop |
| END(__kvm_restore_fpu) |
| |
| LEAF(__kvm_restore_fcsr) |
| .set push |
| SET_HARDFLOAT |
| lw t0, VCPU_FCR31(a0) |
| /* |
| * The ctc1 must stay at this offset in __kvm_restore_fcsr. |
| * See kvm_mips_csr_die_notify() which handles t0 containing a value |
| * which triggers an FP Exception, which must be stepped over and |
| * ignored since the set cause bits must remain there for the guest. |
| */ |
| ctc1 t0, fcr31 |
| jr ra |
| nop |
| .set pop |
| END(__kvm_restore_fcsr) |
