1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * arch/arm/include/asm/vfpmacros.h 4 * 5 * Assembler-only file containing VFP macros and register definitions. 6 */ 7 #include <asm/hwcap.h> 8 9 #include <asm/vfp.h> 10 11 @ Macros to allow building with old toolkits (with no VFP support) 12 .macro VFPFMRX, rd, sysreg, cond 13 MRC\cond p10, 7, \rd, \sysreg, cr0, 0 @ FMRX \rd, \sysreg 14 .endm 15 16 .macro VFPFMXR, sysreg, rd, cond 17 MCR\cond p10, 7, \rd, \sysreg, cr0, 0 @ FMXR \sysreg, \rd 18 .endm 19 20 @ read all the working registers back into the VFP 21 .macro VFPFLDMIA, base, tmp 22 #if __LINUX_ARM_ARCH__ < 6 23 LDC p11, cr0, [\base],#33*4 @ FLDMIAX \base!, {d0-d15} 24 #else 25 LDC p11, cr0, [\base],#32*4 @ FLDMIAD \base!, {d0-d15} 26 #endif 27 #ifdef CONFIG_VFPv3 28 #if __LINUX_ARM_ARCH__ <= 6 29 ldr \tmp, =elf_hwcap @ may not have MVFR regs 30 ldr \tmp, [\tmp, #0] 31 tst \tmp, #HWCAP_VFPD32 32 ldclne p11, cr0, [\base],#32*4 @ FLDMIAD \base!, {d16-d31} 33 addeq \base, \base, #32*4 @ step over unused register space 34 #else 35 VFPFMRX \tmp, MVFR0 @ Media and VFP Feature Register 0 36 and \tmp, \tmp, #MVFR0_A_SIMD_MASK @ A_SIMD field 37 cmp \tmp, #2 @ 32 x 64bit registers? 38 ldcleq p11, cr0, [\base],#32*4 @ FLDMIAD \base!, {d16-d31} 39 addne \base, \base, #32*4 @ step over unused register space 40 #endif 41 #endif 42 .endm 43 44 @ write all the working registers out of the VFP 45 .macro VFPFSTMIA, base, tmp 46 #if __LINUX_ARM_ARCH__ < 6 47 STC p11, cr0, [\base],#33*4 @ FSTMIAX \base!, {d0-d15} 48 #else 49 STC p11, cr0, [\base],#32*4 @ FSTMIAD \base!, {d0-d15} 50 #endif 51 #ifdef CONFIG_VFPv3 52 #if __LINUX_ARM_ARCH__ <= 6 53 ldr \tmp, =elf_hwcap @ may not have MVFR regs 54 ldr \tmp, [\tmp, #0] 55 tst \tmp, #HWCAP_VFPD32 56 stclne p11, cr0, [\base],#32*4 @ FSTMIAD \base!, {d16-d31} 57 addeq \base, \base, #32*4 @ step over unused register space 58 #else 59 VFPFMRX \tmp, MVFR0 @ Media and VFP Feature Register 0 60 and \tmp, \tmp, #MVFR0_A_SIMD_MASK @ A_SIMD field 61 cmp \tmp, #2 @ 32 x 64bit registers? 62 stcleq p11, cr0, [\base],#32*4 @ FSTMIAD \base!, {d16-d31} 63 addne \base, \base, #32*4 @ step over unused register space 64 #endif 65 #endif 66 .endm 67