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|
/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
*
* Copyright (C) 2015-2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
* Copyright (C) 2006-2017 CRYPTOGAMS by <appro@openssl.org>. All Rights Reserved.
*
* This is based in part on Andy Polyakov's implementation from CRYPTOGAMS.
*/
#if !defined(CONFIG_64BIT)
#error "This is only for 64-bit kernels."
#endif
#ifdef __MIPSEB__
#define MSB 0
#define LSB 7
#else
#define MSB 7
#define LSB 0
#endif
#if defined(CONFIG_CPU_MIPS64_R6) || defined(CONFIG_CPU_MIPSR6)
#define dmultu(rs,rt)
#define mflo(rd,rs,rt) dmulu rd,rs,rt
#define mfhi(rd,rs,rt) dmuhu rd,rs,rt
#else
#define dmultu(rs,rt) dmultu rs,rt
#define multu(rs,rt) multu rs,rt
#define mflo(rd,rs,rt) mflo rd
#define mfhi(rd,rs,rt) mfhi rd
#endif
.text
.set noat
.set noreorder
/* While most of the assembly in the kernel prefers ENTRY() and ENDPROC(),
* there is no existing MIPS assembly that uses it, and MIPS assembler seems
* to like its own .ent/.end notation, which the MIPS include files don't
* provide in a MIPS-specific ENTRY/ENDPROC definition. So, we skip these
* for now, until somebody complains. */
.align 5
.globl poly1305_init_mips
.ent poly1305_init_mips
poly1305_init_mips:
.frame $29,0,$31
.set reorder
sd $0,0($4)
sd $0,8($4)
sd $0,16($4)
beqz $5,.Lno_key
#if defined(CONFIG_CPU_MIPS64_R6) || defined(CONFIG_CPU_MIPSR6)
ld $8,0($5)
ld $9,8($5)
#else
ldl $8,0+MSB($5)
ldl $9,8+MSB($5)
ldr $8,0+LSB($5)
ldr $9,8+LSB($5)
#endif
#ifdef __MIPSEB__
#if defined(CONFIG_CPU_MIPS64_R2) || defined(CONFIG_CPU_MIPSR2) || defined(CONFIG_CPU_MIPS64_R6) || defined(CONFIG_CPU_MIPSR6)
dsbh $8,$8 # byte swap
dsbh $9,$9
dshd $8,$8
dshd $9,$9
#else
ori $10,$0,0xFF
dsll $1,$10,32
or $10,$1 # 0x000000FF000000FF
and $11,$8,$10 # byte swap
and $2,$9,$10
dsrl $1,$8,24
dsrl $24,$9,24
dsll $11,24
dsll $2,24
and $1,$10
and $24,$10
dsll $10,8 # 0x0000FF000000FF00
or $11,$1
or $2,$24
and $1,$8,$10
and $24,$9,$10
dsrl $8,8
dsrl $9,8
dsll $1,8
dsll $24,8
and $8,$10
and $9,$10
or $11,$1
or $2,$24
or $8,$11
or $9,$2
dsrl $11,$8,32
dsrl $2,$9,32
dsll $8,32
dsll $9,32
or $8,$11
or $9,$2
#endif
#endif
li $10,1
dsll $10,32
daddiu $10,-63
dsll $10,28
daddiu $10,-1 # 0ffffffc0fffffff
and $8,$10
daddiu $10,-3 # 0ffffffc0ffffffc
and $9,$10
sd $8,24($4)
dsrl $10,$9,2
sd $9,32($4)
daddu $10,$9 # s1 = r1 + (r1 >> 2)
sd $10,40($4)
.Lno_key:
li $2,0 # return 0
jr $31
.end poly1305_init_mips
.align 5
.globl poly1305_blocks_mips
.ent poly1305_blocks_mips
poly1305_blocks_mips:
.set noreorder
dsrl $6,4 # number of complete blocks
bnez $6,poly1305_blocks_internal
nop
jr $31
nop
.end poly1305_blocks_mips
.align 5
.ent poly1305_blocks_internal
poly1305_blocks_internal:
.frame $29,6*8,$31
.mask 0x00030000,-8
.set noreorder
dsubu $29,6*8
sd $17,40($29)
sd $16,32($29)
.set reorder
ld $12,0($4) # load hash value
ld $13,8($4)
ld $14,16($4)
ld $15,24($4) # load key
ld $16,32($4)
ld $17,40($4)
.Loop:
#if defined(CONFIG_CPU_MIPS64_R6) || defined(CONFIG_CPU_MIPSR6)
ld $8,0($5) # load input
ld $9,8($5)
#else
ldl $8,0+MSB($5) # load input
ldl $9,8+MSB($5)
ldr $8,0+LSB($5)
ldr $9,8+LSB($5)
#endif
daddiu $6,-1
daddiu $5,16
#ifdef __MIPSEB__
#if defined(CONFIG_CPU_MIPS64_R2) || defined(CONFIG_CPU_MIPSR2) || defined(CONFIG_CPU_MIPS64_R6) || defined(CONFIG_CPU_MIPSR6)
dsbh $8,$8 # byte swap
dsbh $9,$9
dshd $8,$8
dshd $9,$9
#else
ori $10,$0,0xFF
dsll $1,$10,32
or $10,$1 # 0x000000FF000000FF
and $11,$8,$10 # byte swap
and $2,$9,$10
dsrl $1,$8,24
dsrl $24,$9,24
dsll $11,24
dsll $2,24
and $1,$10
and $24,$10
dsll $10,8 # 0x0000FF000000FF00
or $11,$1
or $2,$24
and $1,$8,$10
and $24,$9,$10
dsrl $8,8
dsrl $9,8
dsll $1,8
dsll $24,8
and $8,$10
and $9,$10
or $11,$1
or $2,$24
or $8,$11
or $9,$2
dsrl $11,$8,32
dsrl $2,$9,32
dsll $8,32
dsll $9,32
or $8,$11
or $9,$2
#endif
#endif
daddu $12,$8 # accumulate input
daddu $13,$9
sltu $10,$12,$8
sltu $11,$13,$9
daddu $13,$10
dmultu ($15,$12) # h0*r0
daddu $14,$7
sltu $10,$13,$10
mflo ($8,$15,$12)
mfhi ($9,$15,$12)
dmultu ($17,$13) # h1*5*r1
daddu $10,$11
daddu $14,$10
mflo ($10,$17,$13)
mfhi ($11,$17,$13)
dmultu ($16,$12) # h0*r1
daddu $8,$10
daddu $9,$11
mflo ($1,$16,$12)
mfhi ($25,$16,$12)
sltu $10,$8,$10
daddu $9,$10
dmultu ($15,$13) # h1*r0
daddu $9,$1
sltu $1,$9,$1
mflo ($10,$15,$13)
mfhi ($11,$15,$13)
daddu $25,$1
dmultu ($17,$14) # h2*5*r1
daddu $9,$10
daddu $25,$11
mflo ($1,$17,$14)
dmultu ($15,$14) # h2*r0
sltu $10,$9,$10
daddu $25,$10
mflo ($2,$15,$14)
daddu $9,$1
daddu $25,$2
sltu $1,$9,$1
daddu $25,$1
li $10,-4 # final reduction
and $10,$25
dsrl $11,$25,2
andi $14,$25,3
daddu $10,$11
daddu $12,$8,$10
sltu $10,$12,$10
daddu $13,$9,$10
sltu $10,$13,$10
daddu $14,$14,$10
bnez $6,.Loop
sd $12,0($4) # store hash value
sd $13,8($4)
sd $14,16($4)
.set noreorder
ld $17,40($29) # epilogue
ld $16,32($29)
jr $31
daddu $29,6*8
.end poly1305_blocks_internal
.align 5
.globl poly1305_emit_mips
.ent poly1305_emit_mips
poly1305_emit_mips:
.frame $29,0,$31
.set reorder
ld $10,0($4)
ld $11,8($4)
ld $1,16($4)
daddiu $8,$10,5 # compare to modulus
sltiu $2,$8,5
daddu $9,$11,$2
sltu $2,$9,$2
daddu $1,$1,$2
dsrl $1,2 # see if it carried/borrowed
dsubu $1,$0,$1
nor $2,$0,$1
and $8,$1
and $10,$2
and $9,$1
and $11,$2
or $8,$10
or $9,$11
lwu $10,0($6) # load nonce
lwu $11,4($6)
lwu $1,8($6)
lwu $2,12($6)
dsll $11,32
dsll $2,32
or $10,$11
or $1,$2
daddu $8,$10 # accumulate nonce
daddu $9,$1
sltu $10,$8,$10
daddu $9,$10
dsrl $10,$8,8 # write mac value
dsrl $11,$8,16
dsrl $1,$8,24
sb $8,0($5)
dsrl $2,$8,32
sb $10,1($5)
dsrl $10,$8,40
sb $11,2($5)
dsrl $11,$8,48
sb $1,3($5)
dsrl $1,$8,56
sb $2,4($5)
dsrl $2,$9,8
sb $10,5($5)
dsrl $10,$9,16
sb $11,6($5)
dsrl $11,$9,24
sb $1,7($5)
sb $9,8($5)
dsrl $1,$9,32
sb $2,9($5)
dsrl $2,$9,40
sb $10,10($5)
dsrl $10,$9,48
sb $11,11($5)
dsrl $11,$9,56
sb $1,12($5)
sb $2,13($5)
sb $10,14($5)
sb $11,15($5)
jr $31
.end poly1305_emit_mips
|
