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linux/arch/sparc/kernel/entry.S
Greg Kroah-Hartman b24413180f 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>
2017-11-02 11:10:55 +01:00

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/* SPDX-License-Identifier: GPL-2.0 */
/* arch/sparc/kernel/entry.S: Sparc trap low-level entry points.
*
* Copyright (C) 1995, 2007 David S. Miller (davem@davemloft.net)
* Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be)
* Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx)
* Copyright (C) 1996-1999 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
* Copyright (C) 1997 Anton Blanchard (anton@progsoc.uts.edu.au)
*/
#include <linux/linkage.h>
#include <linux/errno.h>
#include <asm/head.h>
#include <asm/asi.h>
#include <asm/smp.h>
#include <asm/contregs.h>
#include <asm/ptrace.h>
#include <asm/asm-offsets.h>
#include <asm/psr.h>
#include <asm/vaddrs.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/winmacro.h>
#include <asm/signal.h>
#include <asm/obio.h>
#include <asm/mxcc.h>
#include <asm/thread_info.h>
#include <asm/param.h>
#include <asm/unistd.h>
#include <asm/asmmacro.h>
#include <asm/export.h>
#define curptr g6
/* These are just handy. */
#define _SV save %sp, -STACKFRAME_SZ, %sp
#define _RS restore
#define FLUSH_ALL_KERNEL_WINDOWS \
_SV; _SV; _SV; _SV; _SV; _SV; _SV; \
_RS; _RS; _RS; _RS; _RS; _RS; _RS;
.text
#ifdef CONFIG_KGDB
.align 4
.globl arch_kgdb_breakpoint
.type arch_kgdb_breakpoint,#function
arch_kgdb_breakpoint:
ta 0x7d
retl
nop
.size arch_kgdb_breakpoint,.-arch_kgdb_breakpoint
#endif
#if defined(CONFIG_BLK_DEV_FD) || defined(CONFIG_BLK_DEV_FD_MODULE)
.align 4
.globl floppy_hardint
floppy_hardint:
/*
* This code cannot touch registers %l0 %l1 and %l2
* because SAVE_ALL depends on their values. It depends
* on %l3 also, but we regenerate it before a call.
* Other registers are:
* %l3 -- base address of fdc registers
* %l4 -- pdma_vaddr
* %l5 -- scratch for ld/st address
* %l6 -- pdma_size
* %l7 -- scratch [floppy byte, ld/st address, aux. data]
*/
/* Do we have work to do? */
sethi %hi(doing_pdma), %l7
ld [%l7 + %lo(doing_pdma)], %l7
cmp %l7, 0
be floppy_dosoftint
nop
/* Load fdc register base */
sethi %hi(fdc_status), %l3
ld [%l3 + %lo(fdc_status)], %l3
/* Setup register addresses */
sethi %hi(pdma_vaddr), %l5 ! transfer buffer
ld [%l5 + %lo(pdma_vaddr)], %l4
sethi %hi(pdma_size), %l5 ! bytes to go
ld [%l5 + %lo(pdma_size)], %l6
next_byte:
ldub [%l3], %l7
andcc %l7, 0x80, %g0 ! Does fifo still have data
bz floppy_fifo_emptied ! fifo has been emptied...
andcc %l7, 0x20, %g0 ! in non-dma mode still?
bz floppy_overrun ! nope, overrun
andcc %l7, 0x40, %g0 ! 0=write 1=read
bz floppy_write
sub %l6, 0x1, %l6
/* Ok, actually read this byte */
ldub [%l3 + 1], %l7
orcc %g0, %l6, %g0
stb %l7, [%l4]
bne next_byte
add %l4, 0x1, %l4
b floppy_tdone
nop
floppy_write:
/* Ok, actually write this byte */
ldub [%l4], %l7
orcc %g0, %l6, %g0
stb %l7, [%l3 + 1]
bne next_byte
add %l4, 0x1, %l4
/* fall through... */
floppy_tdone:
sethi %hi(pdma_vaddr), %l5
st %l4, [%l5 + %lo(pdma_vaddr)]
sethi %hi(pdma_size), %l5
st %l6, [%l5 + %lo(pdma_size)]
/* Flip terminal count pin */
set auxio_register, %l7
ld [%l7], %l7
ldub [%l7], %l5
or %l5, 0xc2, %l5
stb %l5, [%l7]
andn %l5, 0x02, %l5
2:
/* Kill some time so the bits set */
WRITE_PAUSE
WRITE_PAUSE
stb %l5, [%l7]
/* Prevent recursion */
sethi %hi(doing_pdma), %l7
b floppy_dosoftint
st %g0, [%l7 + %lo(doing_pdma)]
/* We emptied the FIFO, but we haven't read everything
* as of yet. Store the current transfer address and
* bytes left to read so we can continue when the next
* fast IRQ comes in.
*/
floppy_fifo_emptied:
sethi %hi(pdma_vaddr), %l5
st %l4, [%l5 + %lo(pdma_vaddr)]
sethi %hi(pdma_size), %l7
st %l6, [%l7 + %lo(pdma_size)]
/* Restore condition codes */
wr %l0, 0x0, %psr
WRITE_PAUSE
jmp %l1
rett %l2
floppy_overrun:
sethi %hi(pdma_vaddr), %l5
st %l4, [%l5 + %lo(pdma_vaddr)]
sethi %hi(pdma_size), %l5
st %l6, [%l5 + %lo(pdma_size)]
/* Prevent recursion */
sethi %hi(doing_pdma), %l7
st %g0, [%l7 + %lo(doing_pdma)]
/* fall through... */
floppy_dosoftint:
rd %wim, %l3
SAVE_ALL
/* Set all IRQs off. */
or %l0, PSR_PIL, %l4
wr %l4, 0x0, %psr
WRITE_PAUSE
wr %l4, PSR_ET, %psr
WRITE_PAUSE
mov 11, %o0 ! floppy irq level (unused anyway)
mov %g0, %o1 ! devid is not used in fast interrupts
call sparc_floppy_irq
add %sp, STACKFRAME_SZ, %o2 ! struct pt_regs *regs
RESTORE_ALL
#endif /* (CONFIG_BLK_DEV_FD) */
/* Bad trap handler */
.globl bad_trap_handler
bad_trap_handler:
SAVE_ALL
wr %l0, PSR_ET, %psr
WRITE_PAUSE
add %sp, STACKFRAME_SZ, %o0 ! pt_regs
call do_hw_interrupt
mov %l7, %o1 ! trap number
RESTORE_ALL
/* For now all IRQ's not registered get sent here. handler_irq() will
* see if a routine is registered to handle this interrupt and if not
* it will say so on the console.
*/
.align 4
.globl real_irq_entry, patch_handler_irq
real_irq_entry:
SAVE_ALL
#ifdef CONFIG_SMP
.globl patchme_maybe_smp_msg
cmp %l7, 11
patchme_maybe_smp_msg:
bgu maybe_smp4m_msg
nop
#endif
real_irq_continue:
or %l0, PSR_PIL, %g2
wr %g2, 0x0, %psr
WRITE_PAUSE
wr %g2, PSR_ET, %psr
WRITE_PAUSE
mov %l7, %o0 ! irq level
patch_handler_irq:
call handler_irq
add %sp, STACKFRAME_SZ, %o1 ! pt_regs ptr
or %l0, PSR_PIL, %g2 ! restore PIL after handler_irq
wr %g2, PSR_ET, %psr ! keep ET up
WRITE_PAUSE
RESTORE_ALL
#ifdef CONFIG_SMP
/* SMP per-cpu ticker interrupts are handled specially. */
smp4m_ticker:
bne real_irq_continue+4
or %l0, PSR_PIL, %g2
wr %g2, 0x0, %psr
WRITE_PAUSE
wr %g2, PSR_ET, %psr
WRITE_PAUSE
call smp4m_percpu_timer_interrupt
add %sp, STACKFRAME_SZ, %o0
wr %l0, PSR_ET, %psr
WRITE_PAUSE
RESTORE_ALL
#define GET_PROCESSOR4M_ID(reg) \
rd %tbr, %reg; \
srl %reg, 12, %reg; \
and %reg, 3, %reg;
/* Here is where we check for possible SMP IPI passed to us
* on some level other than 15 which is the NMI and only used
* for cross calls. That has a separate entry point below.
*
* IPIs are sent on Level 12, 13 and 14. See IRQ_IPI_*.
*/
maybe_smp4m_msg:
GET_PROCESSOR4M_ID(o3)
sethi %hi(sun4m_irq_percpu), %l5
sll %o3, 2, %o3
or %l5, %lo(sun4m_irq_percpu), %o5
sethi %hi(0x70000000), %o2 ! Check all soft-IRQs
ld [%o5 + %o3], %o1
ld [%o1 + 0x00], %o3 ! sun4m_irq_percpu[cpu]->pending
andcc %o3, %o2, %g0
be,a smp4m_ticker
cmp %l7, 14
/* Soft-IRQ IPI */
st %o2, [%o1 + 0x04] ! sun4m_irq_percpu[cpu]->clear=0x70000000
WRITE_PAUSE
ld [%o1 + 0x00], %g0 ! sun4m_irq_percpu[cpu]->pending
WRITE_PAUSE
or %l0, PSR_PIL, %l4
wr %l4, 0x0, %psr
WRITE_PAUSE
wr %l4, PSR_ET, %psr
WRITE_PAUSE
srl %o3, 28, %o2 ! shift for simpler checks below
maybe_smp4m_msg_check_single:
andcc %o2, 0x1, %g0
beq,a maybe_smp4m_msg_check_mask
andcc %o2, 0x2, %g0
call smp_call_function_single_interrupt
nop
andcc %o2, 0x2, %g0
maybe_smp4m_msg_check_mask:
beq,a maybe_smp4m_msg_check_resched
andcc %o2, 0x4, %g0
call smp_call_function_interrupt
nop
andcc %o2, 0x4, %g0
maybe_smp4m_msg_check_resched:
/* rescheduling is done in RESTORE_ALL regardless, but incr stats */
beq,a maybe_smp4m_msg_out
nop
call smp_resched_interrupt
nop
maybe_smp4m_msg_out:
RESTORE_ALL
.align 4
.globl linux_trap_ipi15_sun4m
linux_trap_ipi15_sun4m:
SAVE_ALL
sethi %hi(0x80000000), %o2
GET_PROCESSOR4M_ID(o0)
sethi %hi(sun4m_irq_percpu), %l5
or %l5, %lo(sun4m_irq_percpu), %o5
sll %o0, 2, %o0
ld [%o5 + %o0], %o5
ld [%o5 + 0x00], %o3 ! sun4m_irq_percpu[cpu]->pending
andcc %o3, %o2, %g0
be sun4m_nmi_error ! Must be an NMI async memory error
st %o2, [%o5 + 0x04] ! sun4m_irq_percpu[cpu]->clear=0x80000000
WRITE_PAUSE
ld [%o5 + 0x00], %g0 ! sun4m_irq_percpu[cpu]->pending
WRITE_PAUSE
or %l0, PSR_PIL, %l4
wr %l4, 0x0, %psr
WRITE_PAUSE
wr %l4, PSR_ET, %psr
WRITE_PAUSE
call smp4m_cross_call_irq
nop
b ret_trap_lockless_ipi
clr %l6
.globl smp4d_ticker
/* SMP per-cpu ticker interrupts are handled specially. */
smp4d_ticker:
SAVE_ALL
or %l0, PSR_PIL, %g2
sethi %hi(CC_ICLR), %o0
sethi %hi(1 << 14), %o1
or %o0, %lo(CC_ICLR), %o0
stha %o1, [%o0] ASI_M_MXCC /* Clear PIL 14 in MXCC's ICLR */
wr %g2, 0x0, %psr
WRITE_PAUSE
wr %g2, PSR_ET, %psr
WRITE_PAUSE
call smp4d_percpu_timer_interrupt
add %sp, STACKFRAME_SZ, %o0
wr %l0, PSR_ET, %psr
WRITE_PAUSE
RESTORE_ALL
.align 4
.globl linux_trap_ipi15_sun4d
linux_trap_ipi15_sun4d:
SAVE_ALL
sethi %hi(CC_BASE), %o4
sethi %hi(MXCC_ERR_ME|MXCC_ERR_PEW|MXCC_ERR_ASE|MXCC_ERR_PEE), %o2
or %o4, (CC_EREG - CC_BASE), %o0
ldda [%o0] ASI_M_MXCC, %o0
andcc %o0, %o2, %g0
bne 1f
sethi %hi(BB_STAT2), %o2
lduba [%o2] ASI_M_CTL, %o2
andcc %o2, BB_STAT2_MASK, %g0
bne 2f
or %o4, (CC_ICLR - CC_BASE), %o0
sethi %hi(1 << 15), %o1
stha %o1, [%o0] ASI_M_MXCC /* Clear PIL 15 in MXCC's ICLR */
or %l0, PSR_PIL, %l4
wr %l4, 0x0, %psr
WRITE_PAUSE
wr %l4, PSR_ET, %psr
WRITE_PAUSE
call smp4d_cross_call_irq
nop
b ret_trap_lockless_ipi
clr %l6
1: /* MXCC error */
2: /* BB error */
/* Disable PIL 15 */
set CC_IMSK, %l4
lduha [%l4] ASI_M_MXCC, %l5
sethi %hi(1 << 15), %l7
or %l5, %l7, %l5
stha %l5, [%l4] ASI_M_MXCC
/* FIXME */
1: b,a 1b
.globl smpleon_ipi
.extern leon_ipi_interrupt
/* SMP per-cpu IPI interrupts are handled specially. */
smpleon_ipi:
SAVE_ALL
or %l0, PSR_PIL, %g2
wr %g2, 0x0, %psr
WRITE_PAUSE
wr %g2, PSR_ET, %psr
WRITE_PAUSE
call leonsmp_ipi_interrupt
add %sp, STACKFRAME_SZ, %o1 ! pt_regs
wr %l0, PSR_ET, %psr
WRITE_PAUSE
RESTORE_ALL
.align 4
.globl linux_trap_ipi15_leon
linux_trap_ipi15_leon:
SAVE_ALL
or %l0, PSR_PIL, %l4
wr %l4, 0x0, %psr
WRITE_PAUSE
wr %l4, PSR_ET, %psr
WRITE_PAUSE
call leon_cross_call_irq
nop
b ret_trap_lockless_ipi
clr %l6
#endif /* CONFIG_SMP */
/* This routine handles illegal instructions and privileged
* instruction attempts from user code.
*/
.align 4
.globl bad_instruction
bad_instruction:
sethi %hi(0xc1f80000), %l4
ld [%l1], %l5
sethi %hi(0x81d80000), %l7
and %l5, %l4, %l5
cmp %l5, %l7
be 1f
SAVE_ALL
wr %l0, PSR_ET, %psr ! re-enable traps
WRITE_PAUSE
add %sp, STACKFRAME_SZ, %o0
mov %l1, %o1
mov %l2, %o2
call do_illegal_instruction
mov %l0, %o3
RESTORE_ALL
1: /* unimplemented flush - just skip */
jmpl %l2, %g0
rett %l2 + 4
.align 4
.globl priv_instruction
priv_instruction:
SAVE_ALL
wr %l0, PSR_ET, %psr
WRITE_PAUSE
add %sp, STACKFRAME_SZ, %o0
mov %l1, %o1
mov %l2, %o2
call do_priv_instruction
mov %l0, %o3
RESTORE_ALL
/* This routine handles unaligned data accesses. */
.align 4
.globl mna_handler
mna_handler:
andcc %l0, PSR_PS, %g0
be mna_fromuser
nop
SAVE_ALL
wr %l0, PSR_ET, %psr
WRITE_PAUSE
ld [%l1], %o1
call kernel_unaligned_trap
add %sp, STACKFRAME_SZ, %o0
RESTORE_ALL
mna_fromuser:
SAVE_ALL
wr %l0, PSR_ET, %psr ! re-enable traps
WRITE_PAUSE
ld [%l1], %o1
call user_unaligned_trap
add %sp, STACKFRAME_SZ, %o0
RESTORE_ALL
/* This routine handles floating point disabled traps. */
.align 4
.globl fpd_trap_handler
fpd_trap_handler:
SAVE_ALL
wr %l0, PSR_ET, %psr ! re-enable traps
WRITE_PAUSE
add %sp, STACKFRAME_SZ, %o0
mov %l1, %o1
mov %l2, %o2
call do_fpd_trap
mov %l0, %o3
RESTORE_ALL
/* This routine handles Floating Point Exceptions. */
.align 4
.globl fpe_trap_handler
fpe_trap_handler:
set fpsave_magic, %l5
cmp %l1, %l5
be 1f
sethi %hi(fpsave), %l5
or %l5, %lo(fpsave), %l5
cmp %l1, %l5
bne 2f
sethi %hi(fpsave_catch2), %l5
or %l5, %lo(fpsave_catch2), %l5
wr %l0, 0x0, %psr
WRITE_PAUSE
jmp %l5
rett %l5 + 4
1:
sethi %hi(fpsave_catch), %l5
or %l5, %lo(fpsave_catch), %l5
wr %l0, 0x0, %psr
WRITE_PAUSE
jmp %l5
rett %l5 + 4
2:
SAVE_ALL
wr %l0, PSR_ET, %psr ! re-enable traps
WRITE_PAUSE
add %sp, STACKFRAME_SZ, %o0
mov %l1, %o1
mov %l2, %o2
call do_fpe_trap
mov %l0, %o3
RESTORE_ALL
/* This routine handles Tag Overflow Exceptions. */
.align 4
.globl do_tag_overflow
do_tag_overflow:
SAVE_ALL
wr %l0, PSR_ET, %psr ! re-enable traps
WRITE_PAUSE
add %sp, STACKFRAME_SZ, %o0
mov %l1, %o1
mov %l2, %o2
call handle_tag_overflow
mov %l0, %o3
RESTORE_ALL
/* This routine handles Watchpoint Exceptions. */
.align 4
.globl do_watchpoint
do_watchpoint:
SAVE_ALL
wr %l0, PSR_ET, %psr ! re-enable traps
WRITE_PAUSE
add %sp, STACKFRAME_SZ, %o0
mov %l1, %o1
mov %l2, %o2
call handle_watchpoint
mov %l0, %o3
RESTORE_ALL
/* This routine handles Register Access Exceptions. */
.align 4
.globl do_reg_access
do_reg_access:
SAVE_ALL
wr %l0, PSR_ET, %psr ! re-enable traps
WRITE_PAUSE
add %sp, STACKFRAME_SZ, %o0
mov %l1, %o1
mov %l2, %o2
call handle_reg_access
mov %l0, %o3
RESTORE_ALL
/* This routine handles Co-Processor Disabled Exceptions. */
.align 4
.globl do_cp_disabled
do_cp_disabled:
SAVE_ALL
wr %l0, PSR_ET, %psr ! re-enable traps
WRITE_PAUSE
add %sp, STACKFRAME_SZ, %o0
mov %l1, %o1
mov %l2, %o2
call handle_cp_disabled
mov %l0, %o3
RESTORE_ALL
/* This routine handles Co-Processor Exceptions. */
.align 4
.globl do_cp_exception
do_cp_exception:
SAVE_ALL
wr %l0, PSR_ET, %psr ! re-enable traps
WRITE_PAUSE
add %sp, STACKFRAME_SZ, %o0
mov %l1, %o1
mov %l2, %o2
call handle_cp_exception
mov %l0, %o3
RESTORE_ALL
/* This routine handles Hardware Divide By Zero Exceptions. */
.align 4
.globl do_hw_divzero
do_hw_divzero:
SAVE_ALL
wr %l0, PSR_ET, %psr ! re-enable traps
WRITE_PAUSE
add %sp, STACKFRAME_SZ, %o0
mov %l1, %o1
mov %l2, %o2
call handle_hw_divzero
mov %l0, %o3
RESTORE_ALL
.align 4
.globl do_flush_windows
do_flush_windows:
SAVE_ALL
wr %l0, PSR_ET, %psr
WRITE_PAUSE
andcc %l0, PSR_PS, %g0
bne dfw_kernel
nop
call flush_user_windows
nop
/* Advance over the trap instruction. */
ld [%sp + STACKFRAME_SZ + PT_NPC], %l1
add %l1, 0x4, %l2
st %l1, [%sp + STACKFRAME_SZ + PT_PC]
st %l2, [%sp + STACKFRAME_SZ + PT_NPC]
RESTORE_ALL
.globl flush_patch_one
/* We get these for debugging routines using __builtin_return_address() */
dfw_kernel:
flush_patch_one:
FLUSH_ALL_KERNEL_WINDOWS
/* Advance over the trap instruction. */
ld [%sp + STACKFRAME_SZ + PT_NPC], %l1
add %l1, 0x4, %l2
st %l1, [%sp + STACKFRAME_SZ + PT_PC]
st %l2, [%sp + STACKFRAME_SZ + PT_NPC]
RESTORE_ALL
/* The getcc software trap. The user wants the condition codes from
* the %psr in register %g1.
*/
.align 4
.globl getcc_trap_handler
getcc_trap_handler:
srl %l0, 20, %g1 ! give user
and %g1, 0xf, %g1 ! only ICC bits in %psr
jmp %l2 ! advance over trap instruction
rett %l2 + 0x4 ! like this...
/* The setcc software trap. The user has condition codes in %g1
* that it would like placed in the %psr. Be careful not to flip
* any unintentional bits!
*/
.align 4
.globl setcc_trap_handler
setcc_trap_handler:
sll %g1, 0x14, %l4
set PSR_ICC, %l5
andn %l0, %l5, %l0 ! clear ICC bits in %psr
and %l4, %l5, %l4 ! clear non-ICC bits in user value
or %l4, %l0, %l4 ! or them in... mix mix mix
wr %l4, 0x0, %psr ! set new %psr
WRITE_PAUSE ! TI scumbags...
jmp %l2 ! advance over trap instruction
rett %l2 + 0x4 ! like this...
sun4m_nmi_error:
/* NMI async memory error handling. */
sethi %hi(0x80000000), %l4
sethi %hi(sun4m_irq_global), %o5
ld [%o5 + %lo(sun4m_irq_global)], %l5
st %l4, [%l5 + 0x0c] ! sun4m_irq_global->mask_set=0x80000000
WRITE_PAUSE
ld [%l5 + 0x00], %g0 ! sun4m_irq_global->pending
WRITE_PAUSE
or %l0, PSR_PIL, %l4
wr %l4, 0x0, %psr
WRITE_PAUSE
wr %l4, PSR_ET, %psr
WRITE_PAUSE
call sun4m_nmi
nop
st %l4, [%l5 + 0x08] ! sun4m_irq_global->mask_clear=0x80000000
WRITE_PAUSE
ld [%l5 + 0x00], %g0 ! sun4m_irq_global->pending
WRITE_PAUSE
RESTORE_ALL
#ifndef CONFIG_SMP
.align 4
.globl linux_trap_ipi15_sun4m
linux_trap_ipi15_sun4m:
SAVE_ALL
ba sun4m_nmi_error
nop
#endif /* CONFIG_SMP */
.align 4
.globl srmmu_fault
srmmu_fault:
mov 0x400, %l5
mov 0x300, %l4
LEON_PI(lda [%l5] ASI_LEON_MMUREGS, %l6) ! read sfar first
SUN_PI_(lda [%l5] ASI_M_MMUREGS, %l6) ! read sfar first
LEON_PI(lda [%l4] ASI_LEON_MMUREGS, %l5) ! read sfsr last
SUN_PI_(lda [%l4] ASI_M_MMUREGS, %l5) ! read sfsr last
andn %l6, 0xfff, %l6
srl %l5, 6, %l5 ! and encode all info into l7
and %l5, 2, %l5
or %l5, %l6, %l6
or %l6, %l7, %l7 ! l7 = [addr,write,txtfault]
SAVE_ALL
mov %l7, %o1
mov %l7, %o2
and %o1, 1, %o1 ! arg2 = text_faultp
mov %l7, %o3
and %o2, 2, %o2 ! arg3 = writep
andn %o3, 0xfff, %o3 ! arg4 = faulting address
wr %l0, PSR_ET, %psr
WRITE_PAUSE
call do_sparc_fault
add %sp, STACKFRAME_SZ, %o0 ! arg1 = pt_regs ptr
RESTORE_ALL
.align 4
.globl sys_nis_syscall
sys_nis_syscall:
mov %o7, %l5
add %sp, STACKFRAME_SZ, %o0 ! pt_regs *regs arg
call c_sys_nis_syscall
mov %l5, %o7
sunos_execv:
.globl sunos_execv
b sys_execve
clr %i2
.align 4
.globl sys_sparc_pipe
sys_sparc_pipe:
mov %o7, %l5
add %sp, STACKFRAME_SZ, %o0 ! pt_regs *regs arg
call sparc_pipe
mov %l5, %o7
.align 4
.globl sys_sigstack
sys_sigstack:
mov %o7, %l5
mov %fp, %o2
call do_sys_sigstack
mov %l5, %o7
.align 4
.globl sys_sigreturn
sys_sigreturn:
call do_sigreturn
add %sp, STACKFRAME_SZ, %o0
ld [%curptr + TI_FLAGS], %l5
andcc %l5, _TIF_SYSCALL_TRACE, %g0
be 1f
nop
call syscall_trace
mov 1, %o1
1:
/* We don't want to muck with user registers like a
* normal syscall, just return.
*/
RESTORE_ALL
.align 4
.globl sys_rt_sigreturn
sys_rt_sigreturn:
call do_rt_sigreturn
add %sp, STACKFRAME_SZ, %o0
ld [%curptr + TI_FLAGS], %l5
andcc %l5, _TIF_SYSCALL_TRACE, %g0
be 1f
nop
add %sp, STACKFRAME_SZ, %o0
call syscall_trace
mov 1, %o1
1:
/* We are returning to a signal handler. */
RESTORE_ALL
/* Now that we have a real sys_clone, sys_fork() is
* implemented in terms of it. Our _real_ implementation
* of SunOS vfork() will use sys_vfork().
*
* XXX These three should be consolidated into mostly shared
* XXX code just like on sparc64... -DaveM
*/
.align 4
.globl sys_fork, flush_patch_two
sys_fork:
mov %o7, %l5
flush_patch_two:
FLUSH_ALL_KERNEL_WINDOWS;
ld [%curptr + TI_TASK], %o4
rd %psr, %g4
WRITE_PAUSE
mov SIGCHLD, %o0 ! arg0: clone flags
rd %wim, %g5
WRITE_PAUSE
mov %fp, %o1 ! arg1: usp
std %g4, [%o4 + AOFF_task_thread + AOFF_thread_fork_kpsr]
add %sp, STACKFRAME_SZ, %o2 ! arg2: pt_regs ptr
mov 0, %o3
call sparc_do_fork
mov %l5, %o7
/* Whee, kernel threads! */
.globl sys_clone, flush_patch_three
sys_clone:
mov %o7, %l5
flush_patch_three:
FLUSH_ALL_KERNEL_WINDOWS;
ld [%curptr + TI_TASK], %o4
rd %psr, %g4
WRITE_PAUSE
/* arg0,1: flags,usp -- loaded already */
cmp %o1, 0x0 ! Is new_usp NULL?
rd %wim, %g5
WRITE_PAUSE
be,a 1f
mov %fp, %o1 ! yes, use callers usp
andn %o1, 7, %o1 ! no, align to 8 bytes
1:
std %g4, [%o4 + AOFF_task_thread + AOFF_thread_fork_kpsr]
add %sp, STACKFRAME_SZ, %o2 ! arg2: pt_regs ptr
mov 0, %o3
call sparc_do_fork
mov %l5, %o7
/* Whee, real vfork! */
.globl sys_vfork, flush_patch_four
sys_vfork:
flush_patch_four:
FLUSH_ALL_KERNEL_WINDOWS;
ld [%curptr + TI_TASK], %o4
rd %psr, %g4
WRITE_PAUSE
rd %wim, %g5
WRITE_PAUSE
std %g4, [%o4 + AOFF_task_thread + AOFF_thread_fork_kpsr]
sethi %hi(0x4000 | 0x0100 | SIGCHLD), %o0
mov %fp, %o1
or %o0, %lo(0x4000 | 0x0100 | SIGCHLD), %o0
sethi %hi(sparc_do_fork), %l1
mov 0, %o3
jmpl %l1 + %lo(sparc_do_fork), %g0
add %sp, STACKFRAME_SZ, %o2
.align 4
linux_sparc_ni_syscall:
sethi %hi(sys_ni_syscall), %l7
b do_syscall
or %l7, %lo(sys_ni_syscall), %l7
linux_syscall_trace:
add %sp, STACKFRAME_SZ, %o0
call syscall_trace
mov 0, %o1
cmp %o0, 0
bne 3f
mov -ENOSYS, %o0
/* Syscall tracing can modify the registers. */
ld [%sp + STACKFRAME_SZ + PT_G1], %g1
sethi %hi(sys_call_table), %l7
ld [%sp + STACKFRAME_SZ + PT_I0], %i0
or %l7, %lo(sys_call_table), %l7
ld [%sp + STACKFRAME_SZ + PT_I1], %i1
ld [%sp + STACKFRAME_SZ + PT_I2], %i2
ld [%sp + STACKFRAME_SZ + PT_I3], %i3
ld [%sp + STACKFRAME_SZ + PT_I4], %i4
ld [%sp + STACKFRAME_SZ + PT_I5], %i5
cmp %g1, NR_syscalls
bgeu 3f
mov -ENOSYS, %o0
sll %g1, 2, %l4
mov %i0, %o0
ld [%l7 + %l4], %l7
mov %i1, %o1
mov %i2, %o2
mov %i3, %o3
b 2f
mov %i4, %o4
.globl ret_from_fork
ret_from_fork:
call schedule_tail
ld [%g3 + TI_TASK], %o0
b ret_sys_call
ld [%sp + STACKFRAME_SZ + PT_I0], %o0
.globl ret_from_kernel_thread
ret_from_kernel_thread:
call schedule_tail
ld [%g3 + TI_TASK], %o0
ld [%sp + STACKFRAME_SZ + PT_G1], %l0
call %l0
ld [%sp + STACKFRAME_SZ + PT_G2], %o0
rd %psr, %l1
ld [%sp + STACKFRAME_SZ + PT_PSR], %l0
andn %l0, PSR_CWP, %l0
nop
and %l1, PSR_CWP, %l1
or %l0, %l1, %l0
st %l0, [%sp + STACKFRAME_SZ + PT_PSR]
b ret_sys_call
mov 0, %o0
/* Linux native system calls enter here... */
.align 4
.globl linux_sparc_syscall
linux_sparc_syscall:
sethi %hi(PSR_SYSCALL), %l4
or %l0, %l4, %l0
/* Direct access to user regs, must faster. */
cmp %g1, NR_syscalls
bgeu linux_sparc_ni_syscall
sll %g1, 2, %l4
ld [%l7 + %l4], %l7
do_syscall:
SAVE_ALL_HEAD
rd %wim, %l3
wr %l0, PSR_ET, %psr
mov %i0, %o0
mov %i1, %o1
mov %i2, %o2
ld [%curptr + TI_FLAGS], %l5
mov %i3, %o3
andcc %l5, _TIF_SYSCALL_TRACE, %g0
mov %i4, %o4
bne linux_syscall_trace
mov %i0, %l5
2:
call %l7
mov %i5, %o5
3:
st %o0, [%sp + STACKFRAME_SZ + PT_I0]
ret_sys_call:
ld [%curptr + TI_FLAGS], %l6
cmp %o0, -ERESTART_RESTARTBLOCK
ld [%sp + STACKFRAME_SZ + PT_PSR], %g3
set PSR_C, %g2
bgeu 1f
andcc %l6, _TIF_SYSCALL_TRACE, %g0
/* System call success, clear Carry condition code. */
andn %g3, %g2, %g3
clr %l6
st %g3, [%sp + STACKFRAME_SZ + PT_PSR]
bne linux_syscall_trace2
ld [%sp + STACKFRAME_SZ + PT_NPC], %l1 /* pc = npc */
add %l1, 0x4, %l2 /* npc = npc+4 */
st %l1, [%sp + STACKFRAME_SZ + PT_PC]
b ret_trap_entry
st %l2, [%sp + STACKFRAME_SZ + PT_NPC]
1:
/* System call failure, set Carry condition code.
* Also, get abs(errno) to return to the process.
*/
sub %g0, %o0, %o0
or %g3, %g2, %g3
st %o0, [%sp + STACKFRAME_SZ + PT_I0]
mov 1, %l6
st %g3, [%sp + STACKFRAME_SZ + PT_PSR]
bne linux_syscall_trace2
ld [%sp + STACKFRAME_SZ + PT_NPC], %l1 /* pc = npc */
add %l1, 0x4, %l2 /* npc = npc+4 */
st %l1, [%sp + STACKFRAME_SZ + PT_PC]
b ret_trap_entry
st %l2, [%sp + STACKFRAME_SZ + PT_NPC]
linux_syscall_trace2:
add %sp, STACKFRAME_SZ, %o0
mov 1, %o1
call syscall_trace
add %l1, 0x4, %l2 /* npc = npc+4 */
st %l1, [%sp + STACKFRAME_SZ + PT_PC]
b ret_trap_entry
st %l2, [%sp + STACKFRAME_SZ + PT_NPC]
/* Saving and restoring the FPU state is best done from lowlevel code.
*
* void fpsave(unsigned long *fpregs, unsigned long *fsr,
* void *fpqueue, unsigned long *fpqdepth)
*/
.globl fpsave
fpsave:
st %fsr, [%o1] ! this can trap on us if fpu is in bogon state
ld [%o1], %g1
set 0x2000, %g4
andcc %g1, %g4, %g0
be 2f
mov 0, %g2
/* We have an fpqueue to save. */
1:
std %fq, [%o2]
fpsave_magic:
st %fsr, [%o1]
ld [%o1], %g3
andcc %g3, %g4, %g0
add %g2, 1, %g2
bne 1b
add %o2, 8, %o2
2:
st %g2, [%o3]
std %f0, [%o0 + 0x00]
std %f2, [%o0 + 0x08]
std %f4, [%o0 + 0x10]
std %f6, [%o0 + 0x18]
std %f8, [%o0 + 0x20]
std %f10, [%o0 + 0x28]
std %f12, [%o0 + 0x30]
std %f14, [%o0 + 0x38]
std %f16, [%o0 + 0x40]
std %f18, [%o0 + 0x48]
std %f20, [%o0 + 0x50]
std %f22, [%o0 + 0x58]
std %f24, [%o0 + 0x60]
std %f26, [%o0 + 0x68]
std %f28, [%o0 + 0x70]
retl
std %f30, [%o0 + 0x78]
/* Thanks for Theo Deraadt and the authors of the Sprite/netbsd/openbsd
* code for pointing out this possible deadlock, while we save state
* above we could trap on the fsr store so our low level fpu trap
* code has to know how to deal with this.
*/
fpsave_catch:
b fpsave_magic + 4
st %fsr, [%o1]
fpsave_catch2:
b fpsave + 4
st %fsr, [%o1]
/* void fpload(unsigned long *fpregs, unsigned long *fsr); */
.globl fpload
fpload:
ldd [%o0 + 0x00], %f0
ldd [%o0 + 0x08], %f2
ldd [%o0 + 0x10], %f4
ldd [%o0 + 0x18], %f6
ldd [%o0 + 0x20], %f8
ldd [%o0 + 0x28], %f10
ldd [%o0 + 0x30], %f12
ldd [%o0 + 0x38], %f14
ldd [%o0 + 0x40], %f16
ldd [%o0 + 0x48], %f18
ldd [%o0 + 0x50], %f20
ldd [%o0 + 0x58], %f22
ldd [%o0 + 0x60], %f24
ldd [%o0 + 0x68], %f26
ldd [%o0 + 0x70], %f28
ldd [%o0 + 0x78], %f30
ld [%o1], %fsr
retl
nop
/* __ndelay and __udelay take two arguments:
* 0 - nsecs or usecs to delay
* 1 - per_cpu udelay_val (loops per jiffy)
*
* Note that ndelay gives HZ times higher resolution but has a 10ms
* limit. udelay can handle up to 1s.
*/
.globl __ndelay
__ndelay:
save %sp, -STACKFRAME_SZ, %sp
mov %i0, %o0 ! round multiplier up so large ns ok
mov 0x1ae, %o1 ! 2**32 / (1 000 000 000 / HZ)
umul %o0, %o1, %o0
rd %y, %o1
mov %i1, %o1 ! udelay_val
umul %o0, %o1, %o0
rd %y, %o1
ba delay_continue
mov %o1, %o0 ! >>32 later for better resolution
.globl __udelay
__udelay:
save %sp, -STACKFRAME_SZ, %sp
mov %i0, %o0
sethi %hi(0x10c7), %o1 ! round multiplier up so large us ok
or %o1, %lo(0x10c7), %o1 ! 2**32 / 1 000 000
umul %o0, %o1, %o0
rd %y, %o1
mov %i1, %o1 ! udelay_val
umul %o0, %o1, %o0
rd %y, %o1
sethi %hi(0x028f4b62), %l0 ! Add in rounding constant * 2**32,
or %g0, %lo(0x028f4b62), %l0
addcc %o0, %l0, %o0 ! 2**32 * 0.009 999
bcs,a 3f
add %o1, 0x01, %o1
3:
mov HZ, %o0 ! >>32 earlier for wider range
umul %o0, %o1, %o0
rd %y, %o1
delay_continue:
cmp %o0, 0x0
1:
bne 1b
subcc %o0, 1, %o0
ret
restore
EXPORT_SYMBOL(__udelay)
EXPORT_SYMBOL(__ndelay)
/* Handle a software breakpoint */
/* We have to inform parent that child has stopped */
.align 4
.globl breakpoint_trap
breakpoint_trap:
rd %wim,%l3
SAVE_ALL
wr %l0, PSR_ET, %psr
WRITE_PAUSE
st %i0, [%sp + STACKFRAME_SZ + PT_G0] ! for restarting syscalls
call sparc_breakpoint
add %sp, STACKFRAME_SZ, %o0
RESTORE_ALL
#ifdef CONFIG_KGDB
ENTRY(kgdb_trap_low)
rd %wim,%l3
SAVE_ALL
wr %l0, PSR_ET, %psr
WRITE_PAUSE
mov %l7, %o0 ! trap_level
call kgdb_trap
add %sp, STACKFRAME_SZ, %o1 ! struct pt_regs *regs
RESTORE_ALL
ENDPROC(kgdb_trap_low)
#endif
.align 4
.globl flush_patch_exception
flush_patch_exception:
FLUSH_ALL_KERNEL_WINDOWS;
ldd [%o0], %o6
jmpl %o7 + 0xc, %g0 ! see asm-sparc/processor.h
mov 1, %g1 ! signal EFAULT condition
.align 4
.globl kill_user_windows, kuw_patch1_7win
.globl kuw_patch1
kuw_patch1_7win: sll %o3, 6, %o3
/* No matter how much overhead this routine has in the worst
* case scenario, it is several times better than taking the
* traps with the old method of just doing flush_user_windows().
*/
kill_user_windows:
ld [%g6 + TI_UWINMASK], %o0 ! get current umask
orcc %g0, %o0, %g0 ! if no bits set, we are done
be 3f ! nothing to do
rd %psr, %o5 ! must clear interrupts
or %o5, PSR_PIL, %o4 ! or else that could change
wr %o4, 0x0, %psr ! the uwinmask state
WRITE_PAUSE ! burn them cycles
1:
ld [%g6 + TI_UWINMASK], %o0 ! get consistent state
orcc %g0, %o0, %g0 ! did an interrupt come in?
be 4f ! yep, we are done
rd %wim, %o3 ! get current wim
srl %o3, 1, %o4 ! simulate a save
kuw_patch1:
sll %o3, 7, %o3 ! compute next wim
or %o4, %o3, %o3 ! result
andncc %o0, %o3, %o0 ! clean this bit in umask
bne kuw_patch1 ! not done yet
srl %o3, 1, %o4 ! begin another save simulation
wr %o3, 0x0, %wim ! set the new wim
st %g0, [%g6 + TI_UWINMASK] ! clear uwinmask
4:
wr %o5, 0x0, %psr ! re-enable interrupts
WRITE_PAUSE ! burn baby burn
3:
retl ! return
st %g0, [%g6 + TI_W_SAVED] ! no windows saved
.align 4
.globl restore_current
restore_current:
LOAD_CURRENT(g6, o0)
retl
nop
#ifdef CONFIG_PCIC_PCI
#include <asm/pcic.h>
.align 4
.globl linux_trap_ipi15_pcic
linux_trap_ipi15_pcic:
rd %wim, %l3
SAVE_ALL
/*
* First deactivate NMI
* or we cannot drop ET, cannot get window spill traps.
* The busy loop is necessary because the PIO error
* sometimes does not go away quickly and we trap again.
*/
sethi %hi(pcic_regs), %o1
ld [%o1 + %lo(pcic_regs)], %o2
! Get pending status for printouts later.
ld [%o2 + PCI_SYS_INT_PENDING], %o0
mov PCI_SYS_INT_PENDING_CLEAR_ALL, %o1
stb %o1, [%o2 + PCI_SYS_INT_PENDING_CLEAR]
1:
ld [%o2 + PCI_SYS_INT_PENDING], %o1
andcc %o1, ((PCI_SYS_INT_PENDING_PIO|PCI_SYS_INT_PENDING_PCI)>>24), %g0
bne 1b
nop
or %l0, PSR_PIL, %l4
wr %l4, 0x0, %psr
WRITE_PAUSE
wr %l4, PSR_ET, %psr
WRITE_PAUSE
call pcic_nmi
add %sp, STACKFRAME_SZ, %o1 ! struct pt_regs *regs
RESTORE_ALL
.globl pcic_nmi_trap_patch
pcic_nmi_trap_patch:
sethi %hi(linux_trap_ipi15_pcic), %l3
jmpl %l3 + %lo(linux_trap_ipi15_pcic), %g0
rd %psr, %l0
.word 0
#endif /* CONFIG_PCIC_PCI */
.globl flushw_all
flushw_all:
save %sp, -0x40, %sp
save %sp, -0x40, %sp
save %sp, -0x40, %sp
save %sp, -0x40, %sp
save %sp, -0x40, %sp
save %sp, -0x40, %sp
save %sp, -0x40, %sp
restore
restore
restore
restore
restore
restore
ret
restore
#ifdef CONFIG_SMP
ENTRY(hard_smp_processor_id)
661: rd %tbr, %g1
srl %g1, 12, %o0
and %o0, 3, %o0
.section .cpuid_patch, "ax"
/* Instruction location. */
.word 661b
/* SUN4D implementation. */
lda [%g0] ASI_M_VIKING_TMP1, %o0
nop
nop
/* LEON implementation. */
rd %asr17, %o0
srl %o0, 0x1c, %o0
nop
.previous
retl
nop
ENDPROC(hard_smp_processor_id)
#endif
/* End of entry.S */
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