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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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b24413180f
Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
594 lines
17 KiB
ArmAsm
594 lines
17 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0 */
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/* checksum.S: Sparc optimized checksum code.
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*
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* Copyright(C) 1995 Linus Torvalds
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* Copyright(C) 1995 Miguel de Icaza
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* Copyright(C) 1996 David S. Miller
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* Copyright(C) 1997 Jakub Jelinek
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*
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* derived from:
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* Linux/Alpha checksum c-code
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* Linux/ix86 inline checksum assembly
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* RFC1071 Computing the Internet Checksum (esp. Jacobsons m68k code)
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* David Mosberger-Tang for optimized reference c-code
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* BSD4.4 portable checksum routine
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*/
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#include <asm/errno.h>
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#include <asm/export.h>
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#define CSUM_BIGCHUNK(buf, offset, sum, t0, t1, t2, t3, t4, t5) \
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ldd [buf + offset + 0x00], t0; \
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ldd [buf + offset + 0x08], t2; \
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addxcc t0, sum, sum; \
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addxcc t1, sum, sum; \
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ldd [buf + offset + 0x10], t4; \
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addxcc t2, sum, sum; \
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addxcc t3, sum, sum; \
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ldd [buf + offset + 0x18], t0; \
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addxcc t4, sum, sum; \
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addxcc t5, sum, sum; \
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addxcc t0, sum, sum; \
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addxcc t1, sum, sum;
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#define CSUM_LASTCHUNK(buf, offset, sum, t0, t1, t2, t3) \
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ldd [buf - offset - 0x08], t0; \
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ldd [buf - offset - 0x00], t2; \
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addxcc t0, sum, sum; \
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addxcc t1, sum, sum; \
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addxcc t2, sum, sum; \
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addxcc t3, sum, sum;
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/* Do end cruft out of band to get better cache patterns. */
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csum_partial_end_cruft:
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be 1f ! caller asks %o1 & 0x8
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andcc %o1, 4, %g0 ! nope, check for word remaining
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ldd [%o0], %g2 ! load two
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addcc %g2, %o2, %o2 ! add first word to sum
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addxcc %g3, %o2, %o2 ! add second word as well
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add %o0, 8, %o0 ! advance buf ptr
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addx %g0, %o2, %o2 ! add in final carry
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andcc %o1, 4, %g0 ! check again for word remaining
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1: be 1f ! nope, skip this code
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andcc %o1, 3, %o1 ! check for trailing bytes
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ld [%o0], %g2 ! load it
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addcc %g2, %o2, %o2 ! add to sum
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add %o0, 4, %o0 ! advance buf ptr
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addx %g0, %o2, %o2 ! add in final carry
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andcc %o1, 3, %g0 ! check again for trailing bytes
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1: be 1f ! no trailing bytes, return
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addcc %o1, -1, %g0 ! only one byte remains?
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bne 2f ! at least two bytes more
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subcc %o1, 2, %o1 ! only two bytes more?
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b 4f ! only one byte remains
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or %g0, %g0, %o4 ! clear fake hword value
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2: lduh [%o0], %o4 ! get hword
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be 6f ! jmp if only hword remains
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add %o0, 2, %o0 ! advance buf ptr either way
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sll %o4, 16, %o4 ! create upper hword
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4: ldub [%o0], %o5 ! get final byte
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sll %o5, 8, %o5 ! put into place
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or %o5, %o4, %o4 ! coalese with hword (if any)
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6: addcc %o4, %o2, %o2 ! add to sum
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1: retl ! get outta here
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addx %g0, %o2, %o0 ! add final carry into retval
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/* Also do alignment out of band to get better cache patterns. */
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csum_partial_fix_alignment:
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cmp %o1, 6
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bl cpte - 0x4
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andcc %o0, 0x2, %g0
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be 1f
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andcc %o0, 0x4, %g0
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lduh [%o0 + 0x00], %g2
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sub %o1, 2, %o1
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add %o0, 2, %o0
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sll %g2, 16, %g2
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addcc %g2, %o2, %o2
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srl %o2, 16, %g3
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addx %g0, %g3, %g2
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sll %o2, 16, %o2
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sll %g2, 16, %g3
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srl %o2, 16, %o2
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andcc %o0, 0x4, %g0
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or %g3, %o2, %o2
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1: be cpa
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andcc %o1, 0xffffff80, %o3
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ld [%o0 + 0x00], %g2
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sub %o1, 4, %o1
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addcc %g2, %o2, %o2
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add %o0, 4, %o0
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addx %g0, %o2, %o2
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b cpa
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andcc %o1, 0xffffff80, %o3
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/* The common case is to get called with a nicely aligned
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* buffer of size 0x20. Follow the code path for that case.
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*/
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.globl csum_partial
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EXPORT_SYMBOL(csum_partial)
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csum_partial: /* %o0=buf, %o1=len, %o2=sum */
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andcc %o0, 0x7, %g0 ! alignment problems?
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bne csum_partial_fix_alignment ! yep, handle it
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sethi %hi(cpte - 8), %g7 ! prepare table jmp ptr
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andcc %o1, 0xffffff80, %o3 ! num loop iterations
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cpa: be 3f ! none to do
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andcc %o1, 0x70, %g1 ! clears carry flag too
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5: CSUM_BIGCHUNK(%o0, 0x00, %o2, %o4, %o5, %g2, %g3, %g4, %g5)
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CSUM_BIGCHUNK(%o0, 0x20, %o2, %o4, %o5, %g2, %g3, %g4, %g5)
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CSUM_BIGCHUNK(%o0, 0x40, %o2, %o4, %o5, %g2, %g3, %g4, %g5)
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CSUM_BIGCHUNK(%o0, 0x60, %o2, %o4, %o5, %g2, %g3, %g4, %g5)
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addx %g0, %o2, %o2 ! sink in final carry
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subcc %o3, 128, %o3 ! detract from loop iters
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bne 5b ! more to do
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add %o0, 128, %o0 ! advance buf ptr
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andcc %o1, 0x70, %g1 ! clears carry flag too
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3: be cpte ! nope
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andcc %o1, 0xf, %g0 ! anything left at all?
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srl %g1, 1, %o4 ! compute offset
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sub %g7, %g1, %g7 ! adjust jmp ptr
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sub %g7, %o4, %g7 ! final jmp ptr adjust
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jmp %g7 + %lo(cpte - 8) ! enter the table
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add %o0, %g1, %o0 ! advance buf ptr
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cptbl: CSUM_LASTCHUNK(%o0, 0x68, %o2, %g2, %g3, %g4, %g5)
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CSUM_LASTCHUNK(%o0, 0x58, %o2, %g2, %g3, %g4, %g5)
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CSUM_LASTCHUNK(%o0, 0x48, %o2, %g2, %g3, %g4, %g5)
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CSUM_LASTCHUNK(%o0, 0x38, %o2, %g2, %g3, %g4, %g5)
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CSUM_LASTCHUNK(%o0, 0x28, %o2, %g2, %g3, %g4, %g5)
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CSUM_LASTCHUNK(%o0, 0x18, %o2, %g2, %g3, %g4, %g5)
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CSUM_LASTCHUNK(%o0, 0x08, %o2, %g2, %g3, %g4, %g5)
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addx %g0, %o2, %o2 ! fetch final carry
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andcc %o1, 0xf, %g0 ! anything left at all?
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cpte: bne csum_partial_end_cruft ! yep, handle it
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andcc %o1, 8, %g0 ! check how much
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cpout: retl ! get outta here
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mov %o2, %o0 ! return computed csum
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.globl __csum_partial_copy_start, __csum_partial_copy_end
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__csum_partial_copy_start:
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/* Work around cpp -rob */
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#define ALLOC #alloc
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#define EXECINSTR #execinstr
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#define EX(x,y,a,b) \
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98: x,y; \
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.section .fixup,ALLOC,EXECINSTR; \
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.align 4; \
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99: ba 30f; \
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a, b, %o3; \
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.section __ex_table,ALLOC; \
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.align 4; \
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.word 98b, 99b; \
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.text; \
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.align 4
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#define EX2(x,y) \
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98: x,y; \
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.section __ex_table,ALLOC; \
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.align 4; \
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.word 98b, 30f; \
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.text; \
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.align 4
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#define EX3(x,y) \
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98: x,y; \
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.section __ex_table,ALLOC; \
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.align 4; \
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.word 98b, 96f; \
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.text; \
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.align 4
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#define EXT(start,end,handler) \
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.section __ex_table,ALLOC; \
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.align 4; \
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.word start, 0, end, handler; \
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.text; \
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.align 4
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/* This aligned version executes typically in 8.5 superscalar cycles, this
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* is the best I can do. I say 8.5 because the final add will pair with
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* the next ldd in the main unrolled loop. Thus the pipe is always full.
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* If you change these macros (including order of instructions),
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* please check the fixup code below as well.
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*/
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#define CSUMCOPY_BIGCHUNK_ALIGNED(src, dst, sum, off, t0, t1, t2, t3, t4, t5, t6, t7) \
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ldd [src + off + 0x00], t0; \
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ldd [src + off + 0x08], t2; \
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addxcc t0, sum, sum; \
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ldd [src + off + 0x10], t4; \
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addxcc t1, sum, sum; \
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ldd [src + off + 0x18], t6; \
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addxcc t2, sum, sum; \
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std t0, [dst + off + 0x00]; \
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addxcc t3, sum, sum; \
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std t2, [dst + off + 0x08]; \
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addxcc t4, sum, sum; \
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std t4, [dst + off + 0x10]; \
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addxcc t5, sum, sum; \
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std t6, [dst + off + 0x18]; \
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addxcc t6, sum, sum; \
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addxcc t7, sum, sum;
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/* 12 superscalar cycles seems to be the limit for this case,
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* because of this we thus do all the ldd's together to get
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* Viking MXCC into streaming mode. Ho hum...
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*/
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#define CSUMCOPY_BIGCHUNK(src, dst, sum, off, t0, t1, t2, t3, t4, t5, t6, t7) \
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ldd [src + off + 0x00], t0; \
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ldd [src + off + 0x08], t2; \
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ldd [src + off + 0x10], t4; \
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ldd [src + off + 0x18], t6; \
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st t0, [dst + off + 0x00]; \
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addxcc t0, sum, sum; \
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st t1, [dst + off + 0x04]; \
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addxcc t1, sum, sum; \
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st t2, [dst + off + 0x08]; \
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addxcc t2, sum, sum; \
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st t3, [dst + off + 0x0c]; \
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addxcc t3, sum, sum; \
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st t4, [dst + off + 0x10]; \
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addxcc t4, sum, sum; \
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st t5, [dst + off + 0x14]; \
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addxcc t5, sum, sum; \
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st t6, [dst + off + 0x18]; \
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addxcc t6, sum, sum; \
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st t7, [dst + off + 0x1c]; \
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addxcc t7, sum, sum;
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/* Yuck, 6 superscalar cycles... */
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#define CSUMCOPY_LASTCHUNK(src, dst, sum, off, t0, t1, t2, t3) \
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ldd [src - off - 0x08], t0; \
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ldd [src - off - 0x00], t2; \
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addxcc t0, sum, sum; \
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st t0, [dst - off - 0x08]; \
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addxcc t1, sum, sum; \
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st t1, [dst - off - 0x04]; \
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addxcc t2, sum, sum; \
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st t2, [dst - off - 0x00]; \
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addxcc t3, sum, sum; \
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st t3, [dst - off + 0x04];
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/* Handle the end cruft code out of band for better cache patterns. */
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cc_end_cruft:
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be 1f
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andcc %o3, 4, %g0
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EX(ldd [%o0 + 0x00], %g2, and %o3, 0xf)
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add %o1, 8, %o1
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addcc %g2, %g7, %g7
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add %o0, 8, %o0
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addxcc %g3, %g7, %g7
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EX2(st %g2, [%o1 - 0x08])
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addx %g0, %g7, %g7
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andcc %o3, 4, %g0
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EX2(st %g3, [%o1 - 0x04])
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1: be 1f
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andcc %o3, 3, %o3
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EX(ld [%o0 + 0x00], %g2, add %o3, 4)
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add %o1, 4, %o1
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addcc %g2, %g7, %g7
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EX2(st %g2, [%o1 - 0x04])
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addx %g0, %g7, %g7
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andcc %o3, 3, %g0
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add %o0, 4, %o0
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1: be 1f
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addcc %o3, -1, %g0
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bne 2f
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subcc %o3, 2, %o3
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b 4f
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or %g0, %g0, %o4
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2: EX(lduh [%o0 + 0x00], %o4, add %o3, 2)
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add %o0, 2, %o0
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EX2(sth %o4, [%o1 + 0x00])
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be 6f
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add %o1, 2, %o1
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sll %o4, 16, %o4
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4: EX(ldub [%o0 + 0x00], %o5, add %g0, 1)
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EX2(stb %o5, [%o1 + 0x00])
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sll %o5, 8, %o5
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or %o5, %o4, %o4
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6: addcc %o4, %g7, %g7
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1: retl
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addx %g0, %g7, %o0
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/* Also, handle the alignment code out of band. */
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cc_dword_align:
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cmp %g1, 16
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bge 1f
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srl %g1, 1, %o3
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2: cmp %o3, 0
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be,a ccte
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andcc %g1, 0xf, %o3
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andcc %o3, %o0, %g0 ! Check %o0 only (%o1 has the same last 2 bits)
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be,a 2b
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srl %o3, 1, %o3
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1: andcc %o0, 0x1, %g0
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bne ccslow
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andcc %o0, 0x2, %g0
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be 1f
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andcc %o0, 0x4, %g0
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EX(lduh [%o0 + 0x00], %g4, add %g1, 0)
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sub %g1, 2, %g1
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EX2(sth %g4, [%o1 + 0x00])
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add %o0, 2, %o0
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sll %g4, 16, %g4
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addcc %g4, %g7, %g7
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add %o1, 2, %o1
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srl %g7, 16, %g3
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addx %g0, %g3, %g4
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sll %g7, 16, %g7
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sll %g4, 16, %g3
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|
srl %g7, 16, %g7
|
|
andcc %o0, 0x4, %g0
|
|
or %g3, %g7, %g7
|
|
1: be 3f
|
|
andcc %g1, 0xffffff80, %g0
|
|
EX(ld [%o0 + 0x00], %g4, add %g1, 0)
|
|
sub %g1, 4, %g1
|
|
EX2(st %g4, [%o1 + 0x00])
|
|
add %o0, 4, %o0
|
|
addcc %g4, %g7, %g7
|
|
add %o1, 4, %o1
|
|
addx %g0, %g7, %g7
|
|
b 3f
|
|
andcc %g1, 0xffffff80, %g0
|
|
|
|
/* Sun, you just can't beat me, you just can't. Stop trying,
|
|
* give up. I'm serious, I am going to kick the living shit
|
|
* out of you, game over, lights out.
|
|
*/
|
|
.align 8
|
|
.globl __csum_partial_copy_sparc_generic
|
|
EXPORT_SYMBOL(__csum_partial_copy_sparc_generic)
|
|
__csum_partial_copy_sparc_generic:
|
|
/* %o0=src, %o1=dest, %g1=len, %g7=sum */
|
|
xor %o0, %o1, %o4 ! get changing bits
|
|
andcc %o4, 3, %g0 ! check for mismatched alignment
|
|
bne ccslow ! better this than unaligned/fixups
|
|
andcc %o0, 7, %g0 ! need to align things?
|
|
bne cc_dword_align ! yes, we check for short lengths there
|
|
andcc %g1, 0xffffff80, %g0 ! can we use unrolled loop?
|
|
3: be 3f ! nope, less than one loop remains
|
|
andcc %o1, 4, %g0 ! dest aligned on 4 or 8 byte boundary?
|
|
be ccdbl + 4 ! 8 byte aligned, kick ass
|
|
5: CSUMCOPY_BIGCHUNK(%o0,%o1,%g7,0x00,%o4,%o5,%g2,%g3,%g4,%g5,%o2,%o3)
|
|
CSUMCOPY_BIGCHUNK(%o0,%o1,%g7,0x20,%o4,%o5,%g2,%g3,%g4,%g5,%o2,%o3)
|
|
CSUMCOPY_BIGCHUNK(%o0,%o1,%g7,0x40,%o4,%o5,%g2,%g3,%g4,%g5,%o2,%o3)
|
|
CSUMCOPY_BIGCHUNK(%o0,%o1,%g7,0x60,%o4,%o5,%g2,%g3,%g4,%g5,%o2,%o3)
|
|
10: EXT(5b, 10b, 20f) ! note for exception handling
|
|
sub %g1, 128, %g1 ! detract from length
|
|
addx %g0, %g7, %g7 ! add in last carry bit
|
|
andcc %g1, 0xffffff80, %g0 ! more to csum?
|
|
add %o0, 128, %o0 ! advance src ptr
|
|
bne 5b ! we did not go negative, continue looping
|
|
add %o1, 128, %o1 ! advance dest ptr
|
|
3: andcc %g1, 0x70, %o2 ! can use table?
|
|
ccmerge:be ccte ! nope, go and check for end cruft
|
|
andcc %g1, 0xf, %o3 ! get low bits of length (clears carry btw)
|
|
srl %o2, 1, %o4 ! begin negative offset computation
|
|
sethi %hi(12f), %o5 ! set up table ptr end
|
|
add %o0, %o2, %o0 ! advance src ptr
|
|
sub %o5, %o4, %o5 ! continue table calculation
|
|
sll %o2, 1, %g2 ! constant multiplies are fun...
|
|
sub %o5, %g2, %o5 ! some more adjustments
|
|
jmp %o5 + %lo(12f) ! jump into it, duff style, wheee...
|
|
add %o1, %o2, %o1 ! advance dest ptr (carry is clear btw)
|
|
cctbl: CSUMCOPY_LASTCHUNK(%o0,%o1,%g7,0x68,%g2,%g3,%g4,%g5)
|
|
CSUMCOPY_LASTCHUNK(%o0,%o1,%g7,0x58,%g2,%g3,%g4,%g5)
|
|
CSUMCOPY_LASTCHUNK(%o0,%o1,%g7,0x48,%g2,%g3,%g4,%g5)
|
|
CSUMCOPY_LASTCHUNK(%o0,%o1,%g7,0x38,%g2,%g3,%g4,%g5)
|
|
CSUMCOPY_LASTCHUNK(%o0,%o1,%g7,0x28,%g2,%g3,%g4,%g5)
|
|
CSUMCOPY_LASTCHUNK(%o0,%o1,%g7,0x18,%g2,%g3,%g4,%g5)
|
|
CSUMCOPY_LASTCHUNK(%o0,%o1,%g7,0x08,%g2,%g3,%g4,%g5)
|
|
12: EXT(cctbl, 12b, 22f) ! note for exception table handling
|
|
addx %g0, %g7, %g7
|
|
andcc %o3, 0xf, %g0 ! check for low bits set
|
|
ccte: bne cc_end_cruft ! something left, handle it out of band
|
|
andcc %o3, 8, %g0 ! begin checks for that code
|
|
retl ! return
|
|
mov %g7, %o0 ! give em the computed checksum
|
|
ccdbl: CSUMCOPY_BIGCHUNK_ALIGNED(%o0,%o1,%g7,0x00,%o4,%o5,%g2,%g3,%g4,%g5,%o2,%o3)
|
|
CSUMCOPY_BIGCHUNK_ALIGNED(%o0,%o1,%g7,0x20,%o4,%o5,%g2,%g3,%g4,%g5,%o2,%o3)
|
|
CSUMCOPY_BIGCHUNK_ALIGNED(%o0,%o1,%g7,0x40,%o4,%o5,%g2,%g3,%g4,%g5,%o2,%o3)
|
|
CSUMCOPY_BIGCHUNK_ALIGNED(%o0,%o1,%g7,0x60,%o4,%o5,%g2,%g3,%g4,%g5,%o2,%o3)
|
|
11: EXT(ccdbl, 11b, 21f) ! note for exception table handling
|
|
sub %g1, 128, %g1 ! detract from length
|
|
addx %g0, %g7, %g7 ! add in last carry bit
|
|
andcc %g1, 0xffffff80, %g0 ! more to csum?
|
|
add %o0, 128, %o0 ! advance src ptr
|
|
bne ccdbl ! we did not go negative, continue looping
|
|
add %o1, 128, %o1 ! advance dest ptr
|
|
b ccmerge ! finish it off, above
|
|
andcc %g1, 0x70, %o2 ! can use table? (clears carry btw)
|
|
|
|
ccslow: cmp %g1, 0
|
|
mov 0, %g5
|
|
bleu 4f
|
|
andcc %o0, 1, %o5
|
|
be,a 1f
|
|
srl %g1, 1, %g4
|
|
sub %g1, 1, %g1
|
|
EX(ldub [%o0], %g5, add %g1, 1)
|
|
add %o0, 1, %o0
|
|
EX2(stb %g5, [%o1])
|
|
srl %g1, 1, %g4
|
|
add %o1, 1, %o1
|
|
1: cmp %g4, 0
|
|
be,a 3f
|
|
andcc %g1, 1, %g0
|
|
andcc %o0, 2, %g0
|
|
be,a 1f
|
|
srl %g4, 1, %g4
|
|
EX(lduh [%o0], %o4, add %g1, 0)
|
|
sub %g1, 2, %g1
|
|
srl %o4, 8, %g2
|
|
sub %g4, 1, %g4
|
|
EX2(stb %g2, [%o1])
|
|
add %o4, %g5, %g5
|
|
EX2(stb %o4, [%o1 + 1])
|
|
add %o0, 2, %o0
|
|
srl %g4, 1, %g4
|
|
add %o1, 2, %o1
|
|
1: cmp %g4, 0
|
|
be,a 2f
|
|
andcc %g1, 2, %g0
|
|
EX3(ld [%o0], %o4)
|
|
5: srl %o4, 24, %g2
|
|
srl %o4, 16, %g3
|
|
EX2(stb %g2, [%o1])
|
|
srl %o4, 8, %g2
|
|
EX2(stb %g3, [%o1 + 1])
|
|
add %o0, 4, %o0
|
|
EX2(stb %g2, [%o1 + 2])
|
|
addcc %o4, %g5, %g5
|
|
EX2(stb %o4, [%o1 + 3])
|
|
addx %g5, %g0, %g5 ! I am now to lazy to optimize this (question it
|
|
add %o1, 4, %o1 ! is worthy). Maybe some day - with the sll/srl
|
|
subcc %g4, 1, %g4 ! tricks
|
|
bne,a 5b
|
|
EX3(ld [%o0], %o4)
|
|
sll %g5, 16, %g2
|
|
srl %g5, 16, %g5
|
|
srl %g2, 16, %g2
|
|
andcc %g1, 2, %g0
|
|
add %g2, %g5, %g5
|
|
2: be,a 3f
|
|
andcc %g1, 1, %g0
|
|
EX(lduh [%o0], %o4, and %g1, 3)
|
|
andcc %g1, 1, %g0
|
|
srl %o4, 8, %g2
|
|
add %o0, 2, %o0
|
|
EX2(stb %g2, [%o1])
|
|
add %g5, %o4, %g5
|
|
EX2(stb %o4, [%o1 + 1])
|
|
add %o1, 2, %o1
|
|
3: be,a 1f
|
|
sll %g5, 16, %o4
|
|
EX(ldub [%o0], %g2, add %g0, 1)
|
|
sll %g2, 8, %o4
|
|
EX2(stb %g2, [%o1])
|
|
add %g5, %o4, %g5
|
|
sll %g5, 16, %o4
|
|
1: addcc %o4, %g5, %g5
|
|
srl %g5, 16, %o4
|
|
addx %g0, %o4, %g5
|
|
orcc %o5, %g0, %g0
|
|
be 4f
|
|
srl %g5, 8, %o4
|
|
and %g5, 0xff, %g2
|
|
and %o4, 0xff, %o4
|
|
sll %g2, 8, %g2
|
|
or %g2, %o4, %g5
|
|
4: addcc %g7, %g5, %g7
|
|
retl
|
|
addx %g0, %g7, %o0
|
|
__csum_partial_copy_end:
|
|
|
|
/* We do these strange calculations for the csum_*_from_user case only, ie.
|
|
* we only bother with faults on loads... */
|
|
|
|
/* o2 = ((g2%20)&3)*8
|
|
* o3 = g1 - (g2/20)*32 - o2 */
|
|
20:
|
|
cmp %g2, 20
|
|
blu,a 1f
|
|
and %g2, 3, %o2
|
|
sub %g1, 32, %g1
|
|
b 20b
|
|
sub %g2, 20, %g2
|
|
1:
|
|
sll %o2, 3, %o2
|
|
b 31f
|
|
sub %g1, %o2, %o3
|
|
|
|
/* o2 = (!(g2 & 15) ? 0 : (((g2 & 15) + 1) & ~1)*8)
|
|
* o3 = g1 - (g2/16)*32 - o2 */
|
|
21:
|
|
andcc %g2, 15, %o3
|
|
srl %g2, 4, %g2
|
|
be,a 1f
|
|
clr %o2
|
|
add %o3, 1, %o3
|
|
and %o3, 14, %o3
|
|
sll %o3, 3, %o2
|
|
1:
|
|
sll %g2, 5, %g2
|
|
sub %g1, %g2, %o3
|
|
b 31f
|
|
sub %o3, %o2, %o3
|
|
|
|
/* o0 += (g2/10)*16 - 0x70
|
|
* 01 += (g2/10)*16 - 0x70
|
|
* o2 = (g2 % 10) ? 8 : 0
|
|
* o3 += 0x70 - (g2/10)*16 - o2 */
|
|
22:
|
|
cmp %g2, 10
|
|
blu,a 1f
|
|
sub %o0, 0x70, %o0
|
|
add %o0, 16, %o0
|
|
add %o1, 16, %o1
|
|
sub %o3, 16, %o3
|
|
b 22b
|
|
sub %g2, 10, %g2
|
|
1:
|
|
sub %o1, 0x70, %o1
|
|
add %o3, 0x70, %o3
|
|
clr %o2
|
|
tst %g2
|
|
bne,a 1f
|
|
mov 8, %o2
|
|
1:
|
|
b 31f
|
|
sub %o3, %o2, %o3
|
|
96:
|
|
and %g1, 3, %g1
|
|
sll %g4, 2, %g4
|
|
add %g1, %g4, %o3
|
|
30:
|
|
/* %o1 is dst
|
|
* %o3 is # bytes to zero out
|
|
* %o4 is faulting address
|
|
* %o5 is %pc where fault occurred */
|
|
clr %o2
|
|
31:
|
|
/* %o0 is src
|
|
* %o1 is dst
|
|
* %o2 is # of bytes to copy from src to dst
|
|
* %o3 is # bytes to zero out
|
|
* %o4 is faulting address
|
|
* %o5 is %pc where fault occurred */
|
|
save %sp, -104, %sp
|
|
mov %i5, %o0
|
|
mov %i7, %o1
|
|
mov %i4, %o2
|
|
call lookup_fault
|
|
mov %g7, %i4
|
|
cmp %o0, 2
|
|
bne 1f
|
|
add %g0, -EFAULT, %i5
|
|
tst %i2
|
|
be 2f
|
|
mov %i0, %o1
|
|
mov %i1, %o0
|
|
5:
|
|
call memcpy
|
|
mov %i2, %o2
|
|
tst %o0
|
|
bne,a 2f
|
|
add %i3, %i2, %i3
|
|
add %i1, %i2, %i1
|
|
2:
|
|
mov %i1, %o0
|
|
6:
|
|
call __bzero
|
|
mov %i3, %o1
|
|
1:
|
|
ld [%sp + 168], %o2 ! struct_ptr of parent
|
|
st %i5, [%o2]
|
|
ret
|
|
restore
|
|
|
|
.section __ex_table,#alloc
|
|
.align 4
|
|
.word 5b,2
|
|
.word 6b,2
|