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 #ifdef CONFIG_AS_VFP_VMRS_FPINST
12 .macro VFPFMRX, rd, sysreg, cond
13 vmrs\cond \rd, \sysreg
14 .endm
15
16 .macro VFPFMXR, sysreg, rd, cond
17 vmsr\cond \sysreg, \rd
18 .endm
19 #else
20 @ Macros to allow building with old toolkits (with no VFP support)
21 .macro VFPFMRX, rd, sysreg, cond
22 MRC\cond p10, 7, \rd, \sysreg, cr0, 0 @ FMRX \rd, \sysreg
23 .endm
24
25 .macro VFPFMXR, sysreg, rd, cond
26 MCR\cond p10, 7, \rd, \sysreg, cr0, 0 @ FMXR \sysreg, \rd
27 .endm
28 #endif
29
30 @ read all the working registers back into the VFP
31 .macro VFPFLDMIA, base, tmp
32 .fpu vfpv2
33 #if __LINUX_ARM_ARCH__ < 6
34 fldmiax \base!, {d0-d15}
35 #else
36 vldmia \base!, {d0-d15}
37 #endif
38 #ifdef CONFIG_VFPv3
39 .fpu vfpv3
40 #if __LINUX_ARM_ARCH__ <= 6
41 ldr \tmp, =elf_hwcap @ may not have MVFR regs
42 ldr \tmp, [\tmp, #0]
43 tst \tmp, #HWCAP_VFPD32
44 vldmiane \base!, {d16-d31}
45 addeq \base, \base, #32*4 @ step over unused register space
46 #else
47 VFPFMRX \tmp, MVFR0 @ Media and VFP Feature Register 0
48 and \tmp, \tmp, #MVFR0_A_SIMD_MASK @ A_SIMD field
49 cmp \tmp, #2 @ 32 x 64bit registers?
50 vldmiaeq \base!, {d16-d31}
51 addne \base, \base, #32*4 @ step over unused register space
52 #endif
53 #endif
54 .endm
55
56 @ write all the working registers out of the VFP
57 .macro VFPFSTMIA, base, tmp
58 #if __LINUX_ARM_ARCH__ < 6
59 fstmiax \base!, {d0-d15}
60 #else
61 vstmia \base!, {d0-d15}
62 #endif
63 #ifdef CONFIG_VFPv3
64 .fpu vfpv3
65 #if __LINUX_ARM_ARCH__ <= 6
66 ldr \tmp, =elf_hwcap @ may not have MVFR regs
67 ldr \tmp, [\tmp, #0]
68 tst \tmp, #HWCAP_VFPD32
69 vstmiane \base!, {d16-d31}
70 addeq \base, \base, #32*4 @ step over unused register space
71 #else
72 VFPFMRX \tmp, MVFR0 @ Media and VFP Feature Register 0
73 and \tmp, \tmp, #MVFR0_A_SIMD_MASK @ A_SIMD field
74 cmp \tmp, #2 @ 32 x 64bit registers?
75 vstmiaeq \base!, {d16-d31}
76 addne \base, \base, #32*4 @ step over unused register space
77 #endif
78 #endif
79 .endm
80
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