mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-14 17:26:42 +07:00
423fb0d508
Move _save_fp(), _restore_fp() & _init_fpu() out of r2300_switch.S & into r2300_fpu.S. This logically places all FP-related asm code into r2300_fpu.S & provides consistency with R4K after the preceding commit. Besides cleaning up this will be useful for later patches which disable FP support. [ralf@linux-mips.org: Fixed build issues reported by Arnd Bergmann <arnd@arndb.de>] Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/16238/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
189 lines
3.7 KiB
ArmAsm
189 lines
3.7 KiB
ArmAsm
/*
|
|
* 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.
|
|
*
|
|
* Copyright (C) 1996, 1998 by Ralf Baechle
|
|
*
|
|
* Multi-arch abstraction and asm macros for easier reading:
|
|
* Copyright (C) 1996 David S. Miller (davem@davemloft.net)
|
|
*
|
|
* Further modifications to make this work:
|
|
* Copyright (c) 1998 Harald Koerfgen
|
|
*/
|
|
#include <asm/asm.h>
|
|
#include <asm/asmmacro.h>
|
|
#include <asm/errno.h>
|
|
#include <asm/export.h>
|
|
#include <asm/fpregdef.h>
|
|
#include <asm/mipsregs.h>
|
|
#include <asm/asm-offsets.h>
|
|
#include <asm/regdef.h>
|
|
|
|
#define EX(a,b) \
|
|
9: a,##b; \
|
|
.section __ex_table,"a"; \
|
|
PTR 9b,fault; \
|
|
.previous
|
|
|
|
#define EX2(a,b) \
|
|
9: a,##b; \
|
|
.section __ex_table,"a"; \
|
|
PTR 9b,bad_stack; \
|
|
PTR 9b+4,bad_stack; \
|
|
.previous
|
|
|
|
.set mips1
|
|
|
|
/*
|
|
* Save a thread's fp context.
|
|
*/
|
|
LEAF(_save_fp)
|
|
EXPORT_SYMBOL(_save_fp)
|
|
fpu_save_single a0, t1 # clobbers t1
|
|
jr ra
|
|
END(_save_fp)
|
|
|
|
/*
|
|
* Restore a thread's fp context.
|
|
*/
|
|
LEAF(_restore_fp)
|
|
fpu_restore_single a0, t1 # clobbers t1
|
|
jr ra
|
|
END(_restore_fp)
|
|
|
|
/*
|
|
* Load the FPU with signalling NANS. This bit pattern we're using has
|
|
* the property that no matter whether considered as single or as double
|
|
* precision represents signaling NANS.
|
|
*
|
|
* The value to initialize fcr31 to comes in $a0.
|
|
*/
|
|
|
|
.set push
|
|
SET_HARDFLOAT
|
|
|
|
LEAF(_init_fpu)
|
|
mfc0 t0, CP0_STATUS
|
|
li t1, ST0_CU1
|
|
or t0, t1
|
|
mtc0 t0, CP0_STATUS
|
|
|
|
ctc1 a0, fcr31
|
|
|
|
li t0, -1
|
|
|
|
mtc1 t0, $f0
|
|
mtc1 t0, $f1
|
|
mtc1 t0, $f2
|
|
mtc1 t0, $f3
|
|
mtc1 t0, $f4
|
|
mtc1 t0, $f5
|
|
mtc1 t0, $f6
|
|
mtc1 t0, $f7
|
|
mtc1 t0, $f8
|
|
mtc1 t0, $f9
|
|
mtc1 t0, $f10
|
|
mtc1 t0, $f11
|
|
mtc1 t0, $f12
|
|
mtc1 t0, $f13
|
|
mtc1 t0, $f14
|
|
mtc1 t0, $f15
|
|
mtc1 t0, $f16
|
|
mtc1 t0, $f17
|
|
mtc1 t0, $f18
|
|
mtc1 t0, $f19
|
|
mtc1 t0, $f20
|
|
mtc1 t0, $f21
|
|
mtc1 t0, $f22
|
|
mtc1 t0, $f23
|
|
mtc1 t0, $f24
|
|
mtc1 t0, $f25
|
|
mtc1 t0, $f26
|
|
mtc1 t0, $f27
|
|
mtc1 t0, $f28
|
|
mtc1 t0, $f29
|
|
mtc1 t0, $f30
|
|
mtc1 t0, $f31
|
|
jr ra
|
|
END(_init_fpu)
|
|
|
|
.set pop
|
|
|
|
.set noreorder
|
|
|
|
/**
|
|
* _save_fp_context() - save FP context from the FPU
|
|
* @a0 - pointer to fpregs field of sigcontext
|
|
* @a1 - pointer to fpc_csr field of sigcontext
|
|
*
|
|
* Save FP context, including the 32 FP data registers and the FP
|
|
* control & status register, from the FPU to signal context.
|
|
*/
|
|
LEAF(_save_fp_context)
|
|
.set push
|
|
SET_HARDFLOAT
|
|
li v0, 0 # assume success
|
|
cfc1 t1, fcr31
|
|
EX2(s.d $f0, 0(a0))
|
|
EX2(s.d $f2, 16(a0))
|
|
EX2(s.d $f4, 32(a0))
|
|
EX2(s.d $f6, 48(a0))
|
|
EX2(s.d $f8, 64(a0))
|
|
EX2(s.d $f10, 80(a0))
|
|
EX2(s.d $f12, 96(a0))
|
|
EX2(s.d $f14, 112(a0))
|
|
EX2(s.d $f16, 128(a0))
|
|
EX2(s.d $f18, 144(a0))
|
|
EX2(s.d $f20, 160(a0))
|
|
EX2(s.d $f22, 176(a0))
|
|
EX2(s.d $f24, 192(a0))
|
|
EX2(s.d $f26, 208(a0))
|
|
EX2(s.d $f28, 224(a0))
|
|
EX2(s.d $f30, 240(a0))
|
|
jr ra
|
|
EX(sw t1, (a1))
|
|
.set pop
|
|
END(_save_fp_context)
|
|
|
|
/**
|
|
* _restore_fp_context() - restore FP context to the FPU
|
|
* @a0 - pointer to fpregs field of sigcontext
|
|
* @a1 - pointer to fpc_csr field of sigcontext
|
|
*
|
|
* Restore FP context, including the 32 FP data registers and the FP
|
|
* control & status register, from signal context to the FPU.
|
|
*/
|
|
LEAF(_restore_fp_context)
|
|
.set push
|
|
SET_HARDFLOAT
|
|
li v0, 0 # assume success
|
|
EX(lw t0, (a1))
|
|
EX2(l.d $f0, 0(a0))
|
|
EX2(l.d $f2, 16(a0))
|
|
EX2(l.d $f4, 32(a0))
|
|
EX2(l.d $f6, 48(a0))
|
|
EX2(l.d $f8, 64(a0))
|
|
EX2(l.d $f10, 80(a0))
|
|
EX2(l.d $f12, 96(a0))
|
|
EX2(l.d $f14, 112(a0))
|
|
EX2(l.d $f16, 128(a0))
|
|
EX2(l.d $f18, 144(a0))
|
|
EX2(l.d $f20, 160(a0))
|
|
EX2(l.d $f22, 176(a0))
|
|
EX2(l.d $f24, 192(a0))
|
|
EX2(l.d $f26, 208(a0))
|
|
EX2(l.d $f28, 224(a0))
|
|
EX2(l.d $f30, 240(a0))
|
|
jr ra
|
|
ctc1 t0, fcr31
|
|
.set pop
|
|
END(_restore_fp_context)
|
|
.set reorder
|
|
|
|
.type fault, @function
|
|
.ent fault
|
|
fault: li v0, -EFAULT
|
|
jr ra
|
|
.end fault
|