License cleanup: add SPDX GPL-2.0 license identifier to files with no license
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>
2017-11-01 22:07:57 +08:00
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/* SPDX-License-Identifier: GPL-2.0 */
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2009-04-01 16:26:43 +08:00
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#ifndef _SPARC_TRAP_BLOCK_H
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#define _SPARC_TRAP_BLOCK_H
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#include <asm/hypervisor.h>
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#include <asm/asi.h>
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#ifndef __ASSEMBLY__
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/* Trap handling code needs to get at a few critical values upon
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* trap entry and to process TSB misses. These cannot be in the
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* per_cpu() area as we really need to lock them into the TLB and
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* thus make them part of the main kernel image. As a result we
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* try to make this as small as possible.
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*
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* This is padded out and aligned to 64-bytes to avoid false sharing
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* on SMP.
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*/
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/* If you modify the size of this structure, please update
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* TRAP_BLOCK_SZ_SHIFT below.
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*/
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struct thread_info;
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struct trap_per_cpu {
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/* D-cache line 1: Basic thread information, cpu and device mondo queues */
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struct thread_info *thread;
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unsigned long pgd_paddr;
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unsigned long cpu_mondo_pa;
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unsigned long dev_mondo_pa;
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/* D-cache line 2: Error Mondo Queue and kernel buffer pointers */
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unsigned long resum_mondo_pa;
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unsigned long resum_kernel_buf_pa;
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unsigned long nonresum_mondo_pa;
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unsigned long nonresum_kernel_buf_pa;
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/* Dcache lines 3, 4, 5, and 6: Hypervisor Fault Status */
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struct hv_fault_status fault_info;
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/* Dcache line 7: Physical addresses of CPU send mondo block and CPU list. */
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unsigned long cpu_mondo_block_pa;
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unsigned long cpu_list_pa;
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unsigned long tsb_huge;
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unsigned long tsb_huge_temp;
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/* Dcache line 8: IRQ work list, and keep trap_block a power-of-2 in size. */
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unsigned long irq_worklist_pa;
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unsigned int cpu_mondo_qmask;
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unsigned int dev_mondo_qmask;
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unsigned int resum_qmask;
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unsigned int nonresum_qmask;
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2009-04-01 16:47:10 +08:00
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unsigned long __per_cpu_base;
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2009-04-01 16:26:43 +08:00
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} __attribute__((aligned(64)));
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extern struct trap_per_cpu trap_block[NR_CPUS];
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2014-05-17 05:25:50 +08:00
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void init_cur_cpu_trap(struct thread_info *);
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void setup_tba(void);
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2009-04-01 16:26:43 +08:00
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extern int ncpus_probed;
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sparc64: Measure receiver forward progress to avoid send mondo timeout
A large sun4v SPARC system may have moments of intensive xcall activities,
usually caused by unmapping many pages on many CPUs concurrently. This can
flood receivers with CPU mondo interrupts for an extended period, causing
some unlucky senders to hit send-mondo timeout. This problem gets worse
as cpu count increases because sometimes mappings must be invalidated on
all CPUs, and sometimes all CPUs may gang up on a single CPU.
But a busy system is not a broken system. In the above scenario, as long
as the receiver is making forward progress processing mondo interrupts,
the sender should continue to retry.
This patch implements the receiver's forward progress meter by introducing
a per cpu counter 'cpu_mondo_counter[cpu]' where 'cpu' is in the range
of 0..NR_CPUS. The receiver increments its counter as soon as it receives
a mondo and the sender tracks the receiver's counter. If the receiver has
stopped making forward progress when the retry limit is reached, the sender
declares send-mondo-timeout and panic; otherwise, the receiver is allowed
to keep making forward progress.
In addition, it's been observed that PCIe hotplug events generate Correctable
Errors that are handled by hypervisor and then OS. Hypervisor 'borrows'
a guest cpu strand briefly to provide the service. If the cpu strand is
simultaneously the only cpu targeted by a mondo, it may not be available
for the mondo in 20msec, causing SUN4V mondo timeout. It appears that 1 second
is the agreed wait time between hypervisor and guest OS, this patch makes
the adjustment.
Orabug: 25476541
Orabug: 26417466
Signed-off-by: Jane Chu <jane.chu@oracle.com>
Reviewed-by: Steve Sistare <steven.sistare@oracle.com>
Reviewed-by: Anthony Yznaga <anthony.yznaga@oracle.com>
Reviewed-by: Rob Gardner <rob.gardner@oracle.com>
Reviewed-by: Thomas Tai <thomas.tai@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-07-12 02:00:54 +08:00
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extern u64 cpu_mondo_counter[NR_CPUS];
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2009-04-01 16:26:43 +08:00
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2014-05-17 05:25:50 +08:00
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unsigned long real_hard_smp_processor_id(void);
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2009-04-01 16:26:43 +08:00
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struct cpuid_patch_entry {
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unsigned int addr;
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unsigned int cheetah_safari[4];
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unsigned int cheetah_jbus[4];
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unsigned int starfire[4];
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unsigned int sun4v[4];
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};
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extern struct cpuid_patch_entry __cpuid_patch, __cpuid_patch_end;
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struct sun4v_1insn_patch_entry {
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unsigned int addr;
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unsigned int insn;
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};
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extern struct sun4v_1insn_patch_entry __sun4v_1insn_patch,
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__sun4v_1insn_patch_end;
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2017-08-19 03:40:36 +08:00
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extern struct sun4v_1insn_patch_entry __fast_win_ctrl_1insn_patch,
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__fast_win_ctrl_1insn_patch_end;
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2009-04-01 16:26:43 +08:00
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struct sun4v_2insn_patch_entry {
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unsigned int addr;
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unsigned int insns[2];
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};
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extern struct sun4v_2insn_patch_entry __sun4v_2insn_patch,
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__sun4v_2insn_patch_end;
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2015-05-28 00:00:46 +08:00
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extern struct sun4v_2insn_patch_entry __sun_m7_2insn_patch,
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__sun_m7_2insn_patch_end;
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2009-04-01 16:26:43 +08:00
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#endif /* !(__ASSEMBLY__) */
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#define TRAP_PER_CPU_THREAD 0x00
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#define TRAP_PER_CPU_PGD_PADDR 0x08
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#define TRAP_PER_CPU_CPU_MONDO_PA 0x10
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#define TRAP_PER_CPU_DEV_MONDO_PA 0x18
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#define TRAP_PER_CPU_RESUM_MONDO_PA 0x20
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#define TRAP_PER_CPU_RESUM_KBUF_PA 0x28
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#define TRAP_PER_CPU_NONRESUM_MONDO_PA 0x30
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#define TRAP_PER_CPU_NONRESUM_KBUF_PA 0x38
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#define TRAP_PER_CPU_FAULT_INFO 0x40
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#define TRAP_PER_CPU_CPU_MONDO_BLOCK_PA 0xc0
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#define TRAP_PER_CPU_CPU_LIST_PA 0xc8
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#define TRAP_PER_CPU_TSB_HUGE 0xd0
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#define TRAP_PER_CPU_TSB_HUGE_TEMP 0xd8
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#define TRAP_PER_CPU_IRQ_WORKLIST_PA 0xe0
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#define TRAP_PER_CPU_CPU_MONDO_QMASK 0xe8
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#define TRAP_PER_CPU_DEV_MONDO_QMASK 0xec
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#define TRAP_PER_CPU_RESUM_QMASK 0xf0
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#define TRAP_PER_CPU_NONRESUM_QMASK 0xf4
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2009-04-01 16:47:10 +08:00
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#define TRAP_PER_CPU_PER_CPU_BASE 0xf8
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2009-04-01 16:26:43 +08:00
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#define TRAP_BLOCK_SZ_SHIFT 8
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#include <asm/scratchpad.h>
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#define __GET_CPUID(REG) \
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/* Spitfire implementation (default). */ \
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661: ldxa [%g0] ASI_UPA_CONFIG, REG; \
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srlx REG, 17, REG; \
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and REG, 0x1f, REG; \
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nop; \
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.section .cpuid_patch, "ax"; \
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/* Instruction location. */ \
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.word 661b; \
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/* Cheetah Safari implementation. */ \
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ldxa [%g0] ASI_SAFARI_CONFIG, REG; \
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srlx REG, 17, REG; \
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and REG, 0x3ff, REG; \
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nop; \
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/* Cheetah JBUS implementation. */ \
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ldxa [%g0] ASI_JBUS_CONFIG, REG; \
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srlx REG, 17, REG; \
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and REG, 0x1f, REG; \
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nop; \
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/* Starfire implementation. */ \
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sethi %hi(0x1fff40000d0 >> 9), REG; \
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sllx REG, 9, REG; \
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or REG, 0xd0, REG; \
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lduwa [REG] ASI_PHYS_BYPASS_EC_E, REG;\
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/* sun4v implementation. */ \
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mov SCRATCHPAD_CPUID, REG; \
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ldxa [REG] ASI_SCRATCHPAD, REG; \
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nop; \
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nop; \
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.previous;
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#ifdef CONFIG_SMP
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#define TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \
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__GET_CPUID(TMP) \
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sethi %hi(trap_block), DEST; \
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sllx TMP, TRAP_BLOCK_SZ_SHIFT, TMP; \
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or DEST, %lo(trap_block), DEST; \
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add DEST, TMP, DEST; \
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/* Clobbers TMP, current address space PGD phys address into DEST. */
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#define TRAP_LOAD_PGD_PHYS(DEST, TMP) \
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TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \
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ldx [DEST + TRAP_PER_CPU_PGD_PADDR], DEST;
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/* Clobbers TMP, loads local processor's IRQ work area into DEST. */
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#define TRAP_LOAD_IRQ_WORK_PA(DEST, TMP) \
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TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \
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add DEST, TRAP_PER_CPU_IRQ_WORKLIST_PA, DEST;
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/* Clobbers TMP, loads DEST with current thread info pointer. */
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#define TRAP_LOAD_THREAD_REG(DEST, TMP) \
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TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \
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ldx [DEST + TRAP_PER_CPU_THREAD], DEST;
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/* Given the current thread info pointer in THR, load the per-cpu
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* area base of the current processor into DEST. REG1, REG2, and REG3 are
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* clobbered.
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*
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* You absolutely cannot use DEST as a temporary in this code. The
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* reason is that traps can happen during execution, and return from
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* trap will load the fully resolved DEST per-cpu base. This can corrupt
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* the calculations done by the macro mid-stream.
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*/
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#define LOAD_PER_CPU_BASE(DEST, THR, REG1, REG2, REG3) \
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lduh [THR + TI_CPU], REG1; \
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2009-04-01 16:47:10 +08:00
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sethi %hi(trap_block), REG2; \
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sllx REG1, TRAP_BLOCK_SZ_SHIFT, REG1; \
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or REG2, %lo(trap_block), REG2; \
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add REG2, REG1, REG2; \
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ldx [REG2 + TRAP_PER_CPU_PER_CPU_BASE], DEST;
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2009-04-01 16:26:43 +08:00
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#else
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#define TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \
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sethi %hi(trap_block), DEST; \
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or DEST, %lo(trap_block), DEST; \
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/* Uniprocessor versions, we know the cpuid is zero. */
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#define TRAP_LOAD_PGD_PHYS(DEST, TMP) \
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TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \
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ldx [DEST + TRAP_PER_CPU_PGD_PADDR], DEST;
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/* Clobbers TMP, loads local processor's IRQ work area into DEST. */
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#define TRAP_LOAD_IRQ_WORK_PA(DEST, TMP) \
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TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \
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add DEST, TRAP_PER_CPU_IRQ_WORKLIST_PA, DEST;
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#define TRAP_LOAD_THREAD_REG(DEST, TMP) \
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TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \
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ldx [DEST + TRAP_PER_CPU_THREAD], DEST;
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/* No per-cpu areas on uniprocessor, so no need to load DEST. */
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#define LOAD_PER_CPU_BASE(DEST, THR, REG1, REG2, REG3)
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#endif /* !(CONFIG_SMP) */
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#endif /* _SPARC_TRAP_BLOCK_H */
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