^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /* SPDX-License-Identifier: GPL-2.0-only */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * linux/arch/arm/vfp/entry.S
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2004 ARM Limited.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Written by Deep Blue Solutions Limited.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/linkage.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <asm/thread_info.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <asm/vfpmacros.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <asm/assembler.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <asm/asm-offsets.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) @ VFP entry point.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) @
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) @ r0 = instruction opcode (32-bit ARM or two 16-bit Thumb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) @ r2 = PC value to resume execution after successful emulation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) @ r9 = normal "successful" return address
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) @ r10 = this threads thread_info structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) @ lr = unrecognised instruction return address
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) @ IRQs enabled.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) @
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) ENTRY(do_vfp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) inc_preempt_count r10, r4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) ldr r4, .LCvfp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) ldr r11, [r10, #TI_CPU] @ CPU number
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) add r10, r10, #TI_VFPSTATE @ r10 = workspace
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) ldr pc, [r4] @ call VFP entry point
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) ENDPROC(do_vfp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) ENTRY(vfp_null_entry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) dec_preempt_count_ti r10, r4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) ret lr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) ENDPROC(vfp_null_entry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) .align 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) .LCvfp:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) .word vfp_vector