mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-24 05:04:00 +08:00
09831ca734
Original port to early 2.6 kernel using TI COFF toolchain. Brought up to date by Mark Salter <msalter@redhat.com> Signed-off-by: Aurelien Jacquiot <a-jacquiot@ti.com> Signed-off-by: Mark Salter <msalter@redhat.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
420 lines
7.5 KiB
ArmAsm
420 lines
7.5 KiB
ArmAsm
;
|
|
; linux/arch/c6x/lib/csum_64plus.s
|
|
;
|
|
; Port on Texas Instruments TMS320C6x architecture
|
|
;
|
|
; Copyright (C) 2006, 2009, 2010, 2011 Texas Instruments Incorporated
|
|
; Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
|
|
;
|
|
; This program is free software; you can redistribute it and/or modify
|
|
; it under the terms of the GNU General Public License version 2 as
|
|
; published by the Free Software Foundation.
|
|
;
|
|
#include <linux/linkage.h>
|
|
|
|
;
|
|
;unsigned int csum_partial_copy(const char *src, char * dst,
|
|
; int len, int sum)
|
|
;
|
|
; A4: src
|
|
; B4: dst
|
|
; A6: len
|
|
; B6: sum
|
|
; return csum in A4
|
|
;
|
|
|
|
.text
|
|
ENTRY(csum_partial_copy)
|
|
MVC .S2 ILC,B30
|
|
|
|
MV .D1X B6,A31 ; given csum
|
|
ZERO .D1 A9 ; csum (a side)
|
|
|| ZERO .D2 B9 ; csum (b side)
|
|
|| SHRU .S2X A6,2,B5 ; len / 4
|
|
|
|
;; Check alignment and size
|
|
AND .S1 3,A4,A1
|
|
|| AND .S2 3,B4,B0
|
|
OR .L2X B0,A1,B0 ; non aligned condition
|
|
|| MVC .S2 B5,ILC
|
|
|| MVK .D2 1,B2
|
|
|| MV .D1X B5,A1 ; words condition
|
|
[!A1] B .S1 L8
|
|
[B0] BNOP .S1 L6,5
|
|
|
|
SPLOOP 1
|
|
|
|
;; Main loop for aligned words
|
|
LDW .D1T1 *A4++,A7
|
|
NOP 4
|
|
MV .S2X A7,B7
|
|
|| EXTU .S1 A7,0,16,A16
|
|
STW .D2T2 B7,*B4++
|
|
|| MPYU .M2 B7,B2,B8
|
|
|| ADD .L1 A16,A9,A9
|
|
NOP
|
|
SPKERNEL 8,0
|
|
|| ADD .L2 B8,B9,B9
|
|
|
|
ZERO .D1 A1
|
|
|| ADD .L1X A9,B9,A9 ; add csum from a and b sides
|
|
|
|
L6:
|
|
[!A1] BNOP .S1 L8,5
|
|
|
|
;; Main loop for non-aligned words
|
|
SPLOOP 2
|
|
|| MVK .L1 1,A2
|
|
|
|
LDNW .D1T1 *A4++,A7
|
|
NOP 3
|
|
|
|
NOP
|
|
MV .S2X A7,B7
|
|
|| EXTU .S1 A7,0,16,A16
|
|
|| MPYU .M1 A7,A2,A8
|
|
|
|
ADD .L1 A16,A9,A9
|
|
SPKERNEL 6,0
|
|
|| STNW .D2T2 B7,*B4++
|
|
|| ADD .L1 A8,A9,A9
|
|
|
|
L8: AND .S2X 2,A6,B5
|
|
CMPGT .L2 B5,0,B0
|
|
[!B0] BNOP .S1 L82,4
|
|
|
|
;; Manage half-word
|
|
ZERO .L1 A7
|
|
|| ZERO .D1 A8
|
|
|
|
#ifdef CONFIG_CPU_BIG_ENDIAN
|
|
|
|
LDBU .D1T1 *A4++,A7
|
|
LDBU .D1T1 *A4++,A8
|
|
NOP 3
|
|
SHL .S1 A7,8,A0
|
|
ADD .S1 A8,A9,A9
|
|
STB .D2T1 A7,*B4++
|
|
|| ADD .S1 A0,A9,A9
|
|
STB .D2T1 A8,*B4++
|
|
|
|
#else
|
|
|
|
LDBU .D1T1 *A4++,A7
|
|
LDBU .D1T1 *A4++,A8
|
|
NOP 3
|
|
ADD .S1 A7,A9,A9
|
|
SHL .S1 A8,8,A0
|
|
|
|
STB .D2T1 A7,*B4++
|
|
|| ADD .S1 A0,A9,A9
|
|
STB .D2T1 A8,*B4++
|
|
|
|
#endif
|
|
|
|
;; Manage eventually the last byte
|
|
L82: AND .S2X 1,A6,B0
|
|
[!B0] BNOP .S1 L9,5
|
|
|
|
|| ZERO .L1 A7
|
|
|
|
L83: LDBU .D1T1 *A4++,A7
|
|
NOP 4
|
|
|
|
MV .L2X A7,B7
|
|
|
|
#ifdef CONFIG_CPU_BIG_ENDIAN
|
|
|
|
STB .D2T2 B7,*B4++
|
|
|| SHL .S1 A7,8,A7
|
|
ADD .S1 A7,A9,A9
|
|
|
|
#else
|
|
|
|
STB .D2T2 B7,*B4++
|
|
|| ADD .S1 A7,A9,A9
|
|
|
|
#endif
|
|
|
|
;; Fold the csum
|
|
L9: SHRU .S2X A9,16,B0
|
|
[!B0] BNOP .S1 L10,5
|
|
|
|
L91: SHRU .S2X A9,16,B4
|
|
|| EXTU .S1 A9,16,16,A3
|
|
ADD .D1X A3,B4,A9
|
|
|
|
SHRU .S1 A9,16,A0
|
|
[A0] BNOP .S1 L91,5
|
|
|
|
L10: ADD .D1 A31,A9,A9
|
|
MV .D1 A9,A4
|
|
|
|
BNOP .S2 B3,4
|
|
MVC .S2 B30,ILC
|
|
ENDPROC(csum_partial_copy)
|
|
|
|
;
|
|
;unsigned short
|
|
;ip_fast_csum(unsigned char *iph, unsigned int ihl)
|
|
;{
|
|
; unsigned int checksum = 0;
|
|
; unsigned short *tosum = (unsigned short *) iph;
|
|
; int len;
|
|
;
|
|
; len = ihl*4;
|
|
;
|
|
; if (len <= 0)
|
|
; return 0;
|
|
;
|
|
; while(len) {
|
|
; len -= 2;
|
|
; checksum += *tosum++;
|
|
; }
|
|
; if (len & 1)
|
|
; checksum += *(unsigned char*) tosum;
|
|
;
|
|
; while(checksum >> 16)
|
|
; checksum = (checksum & 0xffff) + (checksum >> 16);
|
|
;
|
|
; return ~checksum;
|
|
;}
|
|
;
|
|
; A4: iph
|
|
; B4: ihl
|
|
; return checksum in A4
|
|
;
|
|
.text
|
|
|
|
ENTRY(ip_fast_csum)
|
|
ZERO .D1 A5
|
|
|| MVC .S2 ILC,B30
|
|
SHL .S2 B4,2,B0
|
|
CMPGT .L2 B0,0,B1
|
|
[!B1] BNOP .S1 L15,4
|
|
[!B1] ZERO .D1 A3
|
|
|
|
[!B0] B .S1 L12
|
|
SHRU .S2 B0,1,B0
|
|
MVC .S2 B0,ILC
|
|
NOP 3
|
|
|
|
SPLOOP 1
|
|
LDHU .D1T1 *A4++,A3
|
|
NOP 3
|
|
NOP
|
|
SPKERNEL 5,0
|
|
|| ADD .L1 A3,A5,A5
|
|
|
|
L12: SHRU .S1 A5,16,A0
|
|
[!A0] BNOP .S1 L14,5
|
|
|
|
L13: SHRU .S2X A5,16,B4
|
|
EXTU .S1 A5,16,16,A3
|
|
ADD .D1X A3,B4,A5
|
|
SHRU .S1 A5,16,A0
|
|
[A0] BNOP .S1 L13,5
|
|
|
|
L14: NOT .D1 A5,A3
|
|
EXTU .S1 A3,16,16,A3
|
|
|
|
L15: BNOP .S2 B3,3
|
|
MVC .S2 B30,ILC
|
|
MV .D1 A3,A4
|
|
ENDPROC(ip_fast_csum)
|
|
|
|
;
|
|
;unsigned short
|
|
;do_csum(unsigned char *buff, unsigned int len)
|
|
;{
|
|
; int odd, count;
|
|
; unsigned int result = 0;
|
|
;
|
|
; if (len <= 0)
|
|
; goto out;
|
|
; odd = 1 & (unsigned long) buff;
|
|
; if (odd) {
|
|
;#ifdef __LITTLE_ENDIAN
|
|
; result += (*buff << 8);
|
|
;#else
|
|
; result = *buff;
|
|
;#endif
|
|
; len--;
|
|
; buff++;
|
|
; }
|
|
; count = len >> 1; /* nr of 16-bit words.. */
|
|
; if (count) {
|
|
; if (2 & (unsigned long) buff) {
|
|
; result += *(unsigned short *) buff;
|
|
; count--;
|
|
; len -= 2;
|
|
; buff += 2;
|
|
; }
|
|
; count >>= 1; /* nr of 32-bit words.. */
|
|
; if (count) {
|
|
; unsigned int carry = 0;
|
|
; do {
|
|
; unsigned int w = *(unsigned int *) buff;
|
|
; count--;
|
|
; buff += 4;
|
|
; result += carry;
|
|
; result += w;
|
|
; carry = (w > result);
|
|
; } while (count);
|
|
; result += carry;
|
|
; result = (result & 0xffff) + (result >> 16);
|
|
; }
|
|
; if (len & 2) {
|
|
; result += *(unsigned short *) buff;
|
|
; buff += 2;
|
|
; }
|
|
; }
|
|
; if (len & 1)
|
|
;#ifdef __LITTLE_ENDIAN
|
|
; result += *buff;
|
|
;#else
|
|
; result += (*buff << 8);
|
|
;#endif
|
|
; result = (result & 0xffff) + (result >> 16);
|
|
; /* add up carry.. */
|
|
; result = (result & 0xffff) + (result >> 16);
|
|
; if (odd)
|
|
; result = ((result >> 8) & 0xff) | ((result & 0xff) << 8);
|
|
;out:
|
|
; return result;
|
|
;}
|
|
;
|
|
; A4: buff
|
|
; B4: len
|
|
; return checksum in A4
|
|
;
|
|
|
|
ENTRY(do_csum)
|
|
CMPGT .L2 B4,0,B0
|
|
[!B0] BNOP .S1 L26,3
|
|
EXTU .S1 A4,31,31,A0
|
|
|
|
MV .L1 A0,A3
|
|
|| MV .S1X B3,A5
|
|
|| MV .L2 B4,B3
|
|
|| ZERO .D1 A1
|
|
|
|
#ifdef CONFIG_CPU_BIG_ENDIAN
|
|
[A0] SUB .L2 B3,1,B3
|
|
|| [A0] LDBU .D1T1 *A4++,A1
|
|
#else
|
|
[!A0] BNOP .S1 L21,5
|
|
|| [A0] LDBU .D1T1 *A4++,A0
|
|
SUB .L2 B3,1,B3
|
|
|| SHL .S1 A0,8,A1
|
|
L21:
|
|
#endif
|
|
SHR .S2 B3,1,B0
|
|
[!B0] BNOP .S1 L24,3
|
|
MVK .L1 2,A0
|
|
AND .L1 A4,A0,A0
|
|
|
|
[!A0] BNOP .S1 L22,5
|
|
|| [A0] LDHU .D1T1 *A4++,A0
|
|
SUB .L2 B0,1,B0
|
|
|| SUB .S2 B3,2,B3
|
|
|| ADD .L1 A0,A1,A1
|
|
L22:
|
|
SHR .S2 B0,1,B0
|
|
|| ZERO .L1 A0
|
|
|
|
[!B0] BNOP .S1 L23,5
|
|
|| [B0] MVC .S2 B0,ILC
|
|
|
|
SPLOOP 3
|
|
SPMASK L1
|
|
|| MV .L1 A1,A2
|
|
|| LDW .D1T1 *A4++,A1
|
|
|
|
NOP 4
|
|
ADD .L1 A0,A1,A0
|
|
ADD .L1 A2,A0,A2
|
|
|
|
SPKERNEL 1,2
|
|
|| CMPGTU .L1 A1,A2,A0
|
|
|
|
ADD .L1 A0,A2,A6
|
|
EXTU .S1 A6,16,16,A7
|
|
SHRU .S2X A6,16,B0
|
|
NOP 1
|
|
ADD .L1X A7,B0,A1
|
|
L23:
|
|
MVK .L2 2,B0
|
|
AND .L2 B3,B0,B0
|
|
[B0] LDHU .D1T1 *A4++,A0
|
|
NOP 4
|
|
[B0] ADD .L1 A0,A1,A1
|
|
L24:
|
|
EXTU .S2 B3,31,31,B0
|
|
#ifdef CONFIG_CPU_BIG_ENDIAN
|
|
[!B0] BNOP .S1 L25,4
|
|
|| [B0] LDBU .D1T1 *A4,A0
|
|
SHL .S1 A0,8,A0
|
|
ADD .L1 A0,A1,A1
|
|
L25:
|
|
#else
|
|
[B0] LDBU .D1T1 *A4,A0
|
|
NOP 4
|
|
[B0] ADD .L1 A0,A1,A1
|
|
#endif
|
|
EXTU .S1 A1,16,16,A0
|
|
SHRU .S2X A1,16,B0
|
|
NOP 1
|
|
ADD .L1X A0,B0,A0
|
|
SHRU .S1 A0,16,A1
|
|
ADD .L1 A0,A1,A0
|
|
EXTU .S1 A0,16,16,A1
|
|
EXTU .S1 A1,16,24,A2
|
|
|
|
EXTU .S1 A1,24,16,A0
|
|
|| MV .L2X A3,B0
|
|
|
|
[B0] OR .L1 A0,A2,A1
|
|
L26:
|
|
NOP 1
|
|
BNOP .S2X A5,4
|
|
MV .L1 A1,A4
|
|
ENDPROC(do_csum)
|
|
|
|
;__wsum csum_partial(const void *buff, int len, __wsum wsum)
|
|
;{
|
|
; unsigned int sum = (__force unsigned int)wsum;
|
|
; unsigned int result = do_csum(buff, len);
|
|
;
|
|
; /* add in old sum, and carry.. */
|
|
; result += sum;
|
|
; if (sum > result)
|
|
; result += 1;
|
|
; return (__force __wsum)result;
|
|
;}
|
|
;
|
|
ENTRY(csum_partial)
|
|
MV .L1X B3,A9
|
|
|| CALLP .S2 do_csum,B3
|
|
|| MV .S1 A6,A8
|
|
BNOP .S2X A9,2
|
|
ADD .L1 A8,A4,A1
|
|
CMPGTU .L1 A8,A1,A0
|
|
ADD .L1 A1,A0,A4
|
|
ENDPROC(csum_partial)
|
|
|
|
;unsigned short
|
|
;ip_compute_csum(unsigned char *buff, unsigned int len)
|
|
;
|
|
; A4: buff
|
|
; B4: len
|
|
; return checksum in A4
|
|
|
|
ENTRY(ip_compute_csum)
|
|
MV .L1X B3,A9
|
|
|| CALLP .S2 do_csum,B3
|
|
BNOP .S2X A9,3
|
|
NOT .S1 A4,A4
|
|
CLR .S1 A4,16,31,A4
|
|
ENDPROC(ip_compute_csum)
|