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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>
312 lines
7.5 KiB
ArmAsm
312 lines
7.5 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 1995, 1996, 1997 Paul M. Antoine and Harald Koerfgen
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* Copyright (C) 2000, 2001, 2002, 2003, 2005 Maciej W. Rozycki
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*
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* Written by Ralf Baechle and Andreas Busse, modified for DECstation
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* support by Paul Antoine and Harald Koerfgen.
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*
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* completely rewritten:
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* Copyright (C) 1998 Harald Koerfgen
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*
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* Rewritten extensively for controller-driven IRQ support
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* by Maciej W. Rozycki.
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*/
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#include <asm/addrspace.h>
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#include <asm/asm.h>
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#include <asm/mipsregs.h>
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#include <asm/regdef.h>
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#include <asm/stackframe.h>
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#include <asm/dec/interrupts.h>
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#include <asm/dec/ioasic_addrs.h>
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#include <asm/dec/ioasic_ints.h>
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#include <asm/dec/kn01.h>
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#include <asm/dec/kn02.h>
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#include <asm/dec/kn02xa.h>
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#include <asm/dec/kn03.h>
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#define KN02_CSR_BASE CKSEG1ADDR(KN02_SLOT_BASE + KN02_CSR)
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#define KN02XA_IOASIC_BASE CKSEG1ADDR(KN02XA_SLOT_BASE + IOASIC_IOCTL)
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#define KN03_IOASIC_BASE CKSEG1ADDR(KN03_SLOT_BASE + IOASIC_IOCTL)
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.text
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.set noreorder
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/*
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* plat_irq_dispatch: Interrupt handler for DECstations
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*
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* We follow the model in the Indy interrupt code by David Miller, where he
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* says: a lot of complication here is taken away because:
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*
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* 1) We handle one interrupt and return, sitting in a loop
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* and moving across all the pending IRQ bits in the cause
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* register is _NOT_ the answer, the common case is one
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* pending IRQ so optimize in that direction.
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*
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* 2) We need not check against bits in the status register
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* IRQ mask, that would make this routine slow as hell.
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*
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* 3) Linux only thinks in terms of all IRQs on or all IRQs
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* off, nothing in between like BSD spl() brain-damage.
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*
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* Furthermore, the IRQs on the DECstations look basically (barring
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* software IRQs which we don't use at all) like...
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*
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* DS2100/3100's, aka kn01, aka Pmax:
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*
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* MIPS IRQ Source
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* -------- ------
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* 0 Software (ignored)
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* 1 Software (ignored)
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* 2 SCSI
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* 3 Lance Ethernet
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* 4 DZ11 serial
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* 5 RTC
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* 6 Memory Controller & Video
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* 7 FPU
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*
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* DS5000/200, aka kn02, aka 3max:
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*
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* MIPS IRQ Source
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* -------- ------
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* 0 Software (ignored)
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* 1 Software (ignored)
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* 2 TurboChannel
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* 3 RTC
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* 4 Reserved
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* 5 Memory Controller
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* 6 Reserved
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* 7 FPU
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*
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* DS5000/1xx's, aka kn02ba, aka 3min:
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*
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* MIPS IRQ Source
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* -------- ------
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* 0 Software (ignored)
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* 1 Software (ignored)
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* 2 TurboChannel Slot 0
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* 3 TurboChannel Slot 1
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* 4 TurboChannel Slot 2
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* 5 TurboChannel Slot 3 (ASIC)
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* 6 Halt button
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* 7 FPU/R4k timer
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*
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* DS5000/2x's, aka kn02ca, aka maxine:
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*
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* MIPS IRQ Source
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* -------- ------
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* 0 Software (ignored)
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* 1 Software (ignored)
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* 2 Periodic Interrupt (100usec)
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* 3 RTC
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* 4 I/O write timeout
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* 5 TurboChannel (ASIC)
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* 6 Halt Keycode from Access.Bus keyboard (CTRL-ALT-ENTER)
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* 7 FPU/R4k timer
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*
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* DS5000/2xx's, aka kn03, aka 3maxplus:
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*
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* MIPS IRQ Source
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* -------- ------
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* 0 Software (ignored)
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* 1 Software (ignored)
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* 2 System Board (ASIC)
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* 3 RTC
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* 4 Reserved
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* 5 Memory
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* 6 Halt Button
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* 7 FPU/R4k timer
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*
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* We handle the IRQ according to _our_ priority (see setup.c),
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* then we just return. If multiple IRQs are pending then we will
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* just take another exception, big deal.
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*/
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.align 5
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NESTED(plat_irq_dispatch, PT_SIZE, ra)
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.set noreorder
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/*
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* Get pending Interrupts
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*/
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mfc0 t0,CP0_CAUSE # get pending interrupts
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mfc0 t1,CP0_STATUS
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#ifdef CONFIG_32BIT
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lw t2,cpu_fpu_mask
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#endif
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andi t0,ST0_IM # CAUSE.CE may be non-zero!
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and t0,t1 # isolate allowed ones
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beqz t0,spurious
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#ifdef CONFIG_32BIT
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and t2,t0
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bnez t2,fpu # handle FPU immediately
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#endif
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/*
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* Find irq with highest priority
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*/
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# open coded PTR_LA t1, cpu_mask_nr_tbl
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#if defined(CONFIG_32BIT) || defined(KBUILD_64BIT_SYM32)
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# open coded la t1, cpu_mask_nr_tbl
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lui t1, %hi(cpu_mask_nr_tbl)
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addiu t1, %lo(cpu_mask_nr_tbl)
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#else
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#error GCC `-msym32' option required for 64-bit DECstation builds
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#endif
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1: lw t2,(t1)
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nop
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and t2,t0
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beqz t2,1b
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addu t1,2*PTRSIZE # delay slot
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/*
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* Do the low-level stuff
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*/
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lw a0,(-PTRSIZE)(t1)
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nop
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bgez a0,handle_it # irq_nr >= 0?
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# irq_nr < 0: it is an address
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nop
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jr a0
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# a trick to save a branch:
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lui t2,(KN03_IOASIC_BASE>>16)&0xffff
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# upper part of IOASIC Address
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/*
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* Handle "IRQ Controller" Interrupts
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* Masked Interrupts are still visible and have to be masked "by hand".
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*/
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FEXPORT(kn02_io_int) # 3max
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lui t0,(KN02_CSR_BASE>>16)&0xffff
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# get interrupt status and mask
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lw t0,(t0)
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nop
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andi t1,t0,KN02_IRQ_ALL
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b 1f
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srl t0,16 # shift interrupt mask
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FEXPORT(kn02xa_io_int) # 3min/maxine
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lui t2,(KN02XA_IOASIC_BASE>>16)&0xffff
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# upper part of IOASIC Address
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FEXPORT(kn03_io_int) # 3max+ (t2 loaded earlier)
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lw t0,IO_REG_SIR(t2) # get status: IOASIC sir
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lw t1,IO_REG_SIMR(t2) # get mask: IOASIC simr
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nop
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1: and t0,t1 # mask out allowed ones
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beqz t0,spurious
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/*
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* Find irq with highest priority
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*/
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# open coded PTR_LA t1,asic_mask_nr_tbl
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#if defined(CONFIG_32BIT) || defined(KBUILD_64BIT_SYM32)
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# open coded la t1, asic_mask_nr_tbl
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lui t1, %hi(asic_mask_nr_tbl)
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addiu t1, %lo(asic_mask_nr_tbl)
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#else
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#error GCC `-msym32' option required for 64-bit DECstation builds
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#endif
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2: lw t2,(t1)
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nop
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and t2,t0
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beq zero,t2,2b
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addu t1,2*PTRSIZE # delay slot
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/*
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* Do the low-level stuff
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*/
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lw a0,%lo(-PTRSIZE)(t1)
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nop
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bgez a0,handle_it # irq_nr >= 0?
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# irq_nr < 0: it is an address
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nop
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jr a0
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nop # delay slot
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/*
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* Dispatch low-priority interrupts. We reconsider all status
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* bits again, which looks like a lose, but it makes the code
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* simple and O(log n), so it gets compensated.
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*/
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FEXPORT(cpu_all_int) # HALT, timers, software junk
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li a0,DEC_CPU_IRQ_BASE
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srl t0,CAUSEB_IP
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li t1,CAUSEF_IP>>CAUSEB_IP # mask
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b 1f
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li t2,4 # nr of bits / 2
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FEXPORT(kn02_all_int) # impossible ?
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li a0,KN02_IRQ_BASE
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li t1,KN02_IRQ_ALL # mask
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b 1f
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li t2,4 # nr of bits / 2
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FEXPORT(asic_all_int) # various I/O ASIC junk
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li a0,IO_IRQ_BASE
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li t1,IO_IRQ_ALL # mask
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b 1f
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li t2,8 # nr of bits / 2
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/*
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* Dispatch DMA interrupts -- O(log n).
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*/
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FEXPORT(asic_dma_int) # I/O ASIC DMA events
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li a0,IO_IRQ_BASE+IO_INR_DMA
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srl t0,IO_INR_DMA
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li t1,IO_IRQ_DMA>>IO_INR_DMA # mask
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li t2,8 # nr of bits / 2
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/*
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* Find irq with highest priority.
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* Highest irq number takes precedence.
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*/
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1: srlv t3,t1,t2
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2: xor t1,t3
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and t3,t0,t1
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beqz t3,3f
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nop
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move t0,t3
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addu a0,t2
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3: srl t2,1
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bnez t2,2b
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srlv t3,t1,t2
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handle_it:
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j dec_irq_dispatch
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nop
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#ifdef CONFIG_32BIT
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fpu:
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lw t0,fpu_kstat_irq
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nop
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lw t1,(t0)
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nop
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addu t1,1
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j handle_fpe_int
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sw t1,(t0)
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#endif
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spurious:
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j spurious_interrupt
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nop
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END(plat_irq_dispatch)
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/*
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* Generic unimplemented interrupt routines -- cpu_mask_nr_tbl
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* and asic_mask_nr_tbl are initialized to point all interrupts here.
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* The tables are then filled in by machine-specific initialisation
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* in dec_setup().
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*/
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FEXPORT(dec_intr_unimplemented)
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move a1,t0 # cheats way of printing an arg!
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PANIC("Unimplemented cpu interrupt! CP0_CAUSE: 0x%08x");
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FEXPORT(asic_intr_unimplemented)
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move a1,t0 # cheats way of printing an arg!
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PANIC("Unimplemented asic interrupt! ASIC ISR: 0x%08x");
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