OpenE2K/linux
6
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity
370aadd16d
linux/arch/sparc/kernel/head_32.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

813 lines
19 KiB
ArmAsm
Raw Blame History

/* SPDX-License-Identifier: GPL-2.0 */
/*
* head.S: The initial boot code for the Sparc port of Linux.
*
* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
* Copyright (C) 1995,1999 Pete Zaitcev (zaitcev@yahoo.com)
* Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx)
* Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
* Copyright (C) 1997 Michael A. Griffith (grif@acm.org)
*
* CompactPCI platform by Eric Brower, 1999.
*/
#include <linux/version.h>
#include <linux/init.h>
#include <asm/head.h>
#include <asm/asi.h>
#include <asm/contregs.h>
#include <asm/ptrace.h>
#include <asm/psr.h>
#include <asm/page.h>
#include <asm/kdebug.h>
#include <asm/winmacro.h>
#include <asm/thread_info.h> /* TI_UWINMASK */
#include <asm/errno.h>
#include <asm/pgtsrmmu.h> /* SRMMU_PGDIR_SHIFT */
#include <asm/export.h>
.data
/* The following are used with the prom_vector node-ops to figure out
* the cpu-type
*/
.align 4
.globl cputypval
cputypval:
.asciz "sun4m"
.ascii " "
/* Tested on SS-5, SS-10 */
.align 4
cputypvar:
.asciz "compatible"
.align 4
notsup:
.asciz "Sparc-Linux sun4/sun4c or MMU-less not supported\n\n"
.align 4
sun4e_notsup:
.asciz "Sparc-Linux sun4e support does not exist\n\n"
.align 4
/* The trap-table - located in the __HEAD section */
#include "ttable_32.S"
.align PAGE_SIZE
/* This was the only reasonable way I could think of to properly align
* these page-table data structures.
*/
.globl empty_zero_page
empty_zero_page: .skip PAGE_SIZE
EXPORT_SYMBOL(empty_zero_page)
.global root_flags
.global ram_flags
.global root_dev
.global sparc_ramdisk_image
.global sparc_ramdisk_size
/* This stuff has to be in sync with SILO and other potential boot loaders
* Fields should be kept upward compatible and whenever any change is made,
* HdrS version should be incremented.
*/
.ascii "HdrS"
.word LINUX_VERSION_CODE
.half 0x0203 /* HdrS version */
root_flags:
.half 1
root_dev:
.half 0
ram_flags:
.half 0
sparc_ramdisk_image:
.word 0
sparc_ramdisk_size:
.word 0
.word reboot_command
.word 0, 0, 0
.word _end
/* Cool, here we go. Pick up the romvec pointer in %o0 and stash it in
* %g7 and at prom_vector_p. And also quickly check whether we are on
* a v0, v2, or v3 prom.
*/
gokernel:
/* Ok, it's nice to know, as early as possible, if we
* are already mapped where we expect to be in virtual
* memory. The Solaris /boot elf format bootloader
* will peek into our elf header and load us where
* we want to be, otherwise we have to re-map.
*
* Some boot loaders don't place the jmp'rs address
* in %o7, so we do a pc-relative call to a local
* label, then see what %o7 has.
*/
mov %o7, %g4 ! Save %o7
/* Jump to it, and pray... */
current_pc:
call 1f
nop
1:
mov %o7, %g3
tst %o0
be no_sun4u_here
mov %g4, %o7 /* Previous %o7. */
mov %o0, %l0 ! stash away romvec
mov %o0, %g7 ! put it here too
mov %o1, %l1 ! stash away debug_vec too
/* Ok, let's check out our run time program counter. */
set current_pc, %g5
cmp %g3, %g5
be already_mapped
nop
/* %l6 will hold the offset we have to subtract
* from absolute symbols in order to access areas
* in our own image. If already mapped this is
* just plain zero, else it is KERNBASE.
*/
set KERNBASE, %l6
b copy_prom_lvl14
nop
already_mapped:
mov 0, %l6
/* Copy over the Prom's level 14 clock handler. */
copy_prom_lvl14:
#if 1
/* DJHR
* preserve our linked/calculated instructions
*/
set lvl14_save, %g1
set t_irq14, %g3
sub %g1, %l6, %g1 ! translate to physical
sub %g3, %l6, %g3 ! translate to physical
ldd [%g3], %g4
std %g4, [%g1]
ldd [%g3+8], %g4
std %g4, [%g1+8]
#endif
rd %tbr, %g1
andn %g1, 0xfff, %g1 ! proms trap table base
or %g0, (0x1e<<4), %g2 ! offset to lvl14 intr
or %g1, %g2, %g2
set t_irq14, %g3
sub %g3, %l6, %g3
ldd [%g2], %g4
std %g4, [%g3]
ldd [%g2 + 0x8], %g4
std %g4, [%g3 + 0x8] ! Copy proms handler
/* DON'T TOUCH %l0 thru %l5 in these remapping routines,
* we need their values afterwards!
*/
/* Now check whether we are already mapped, if we
* are we can skip all this garbage coming up.
*/
copy_prom_done:
cmp %l6, 0
be go_to_highmem ! this will be a nop then
nop
/* Validate that we are in fact running on an
* SRMMU based cpu.
*/
set 0x4000, %g6
cmp %g7, %g6
bne not_a_sun4
nop
halt_notsup:
ld [%g7 + 0x68], %o1
set notsup, %o0
sub %o0, %l6, %o0
call %o1
nop
ba halt_me
nop
not_a_sun4:
/* It looks like this is a machine we support.
* Now find out what MMU we are dealing with
* LEON - identified by the psr.impl field
* Viking - identified by the psr.impl field
* In all other cases a sun4m srmmu.
* We check that the MMU is enabled in all cases.
*/
/* Check if this is a LEON CPU */
rd %psr, %g3
srl %g3, PSR_IMPL_SHIFT, %g3
and %g3, PSR_IMPL_SHIFTED_MASK, %g3
cmp %g3, PSR_IMPL_LEON
be leon_remap /* It is a LEON - jump */
nop
/* Sanity-check, is MMU enabled */
lda [%g0] ASI_M_MMUREGS, %g1
andcc %g1, 1, %g0
be halt_notsup
nop
/* Check for a viking (TI) module. */
cmp %g3, PSR_IMPL_TI
bne srmmu_not_viking
nop
/* Figure out what kind of viking we are on.
* We need to know if we have to play with the
* AC bit and disable traps or not.
*/
/* I've only seen MicroSparc's on SparcClassics with this
* bit set.
*/
set 0x800, %g2
lda [%g0] ASI_M_MMUREGS, %g3 ! peek in the control reg
and %g2, %g3, %g3
subcc %g3, 0x0, %g0
bnz srmmu_not_viking ! is in mbus mode
nop
rd %psr, %g3 ! DO NOT TOUCH %g3
andn %g3, PSR_ET, %g2
wr %g2, 0x0, %psr
WRITE_PAUSE
/* Get context table pointer, then convert to
* a physical address, which is 36 bits.
*/
set AC_M_CTPR, %g4
lda [%g4] ASI_M_MMUREGS, %g4
sll %g4, 0x4, %g4 ! We use this below
! DO NOT TOUCH %g4
/* Set the AC bit in the Viking's MMU control reg. */
lda [%g0] ASI_M_MMUREGS, %g5 ! DO NOT TOUCH %g5
set 0x8000, %g6 ! AC bit mask
or %g5, %g6, %g6 ! Or it in...
sta %g6, [%g0] ASI_M_MMUREGS ! Close your eyes...
/* Grrr, why does it seem like every other load/store
* on the sun4m is in some ASI space...
* Fine with me, let's get the pointer to the level 1
* page table directory and fetch its entry.
*/
lda [%g4] ASI_M_BYPASS, %o1 ! This is a level 1 ptr
srl %o1, 0x4, %o1 ! Clear low 4 bits
sll %o1, 0x8, %o1 ! Make physical
/* Ok, pull in the PTD. */
lda [%o1] ASI_M_BYPASS, %o2 ! This is the 0x0 16MB pgd
/* Calculate to KERNBASE entry. */
add %o1, KERNBASE >> (SRMMU_PGDIR_SHIFT - 2), %o3
/* Poke the entry into the calculated address. */
sta %o2, [%o3] ASI_M_BYPASS
/* I don't get it Sun, if you engineered all these
* boot loaders and the PROM (thank you for the debugging
* features btw) why did you not have them load kernel
* images up in high address space, since this is necessary
* for ABI compliance anyways? Does this low-mapping provide
* enhanced interoperability?
*
* "The PROM is the computer."
*/
/* Ok, restore the MMU control register we saved in %g5 */
sta %g5, [%g0] ASI_M_MMUREGS ! POW... ouch
/* Turn traps back on. We saved it in %g3 earlier. */
wr %g3, 0x0, %psr ! tick tock, tick tock
/* Now we burn precious CPU cycles due to bad engineering. */
WRITE_PAUSE
/* Wow, all that just to move a 32-bit value from one
* place to another... Jump to high memory.
*/
b go_to_highmem
nop
srmmu_not_viking:
/* This works on viking's in Mbus mode and all
* other MBUS modules. It is virtually the same as
* the above madness sans turning traps off and flipping
* the AC bit.
*/
set AC_M_CTPR, %g1
lda [%g1] ASI_M_MMUREGS, %g1 ! get ctx table ptr
sll %g1, 0x4, %g1 ! make physical addr
lda [%g1] ASI_M_BYPASS, %g1 ! ptr to level 1 pg_table
srl %g1, 0x4, %g1
sll %g1, 0x8, %g1 ! make phys addr for l1 tbl
lda [%g1] ASI_M_BYPASS, %g2 ! get level1 entry for 0x0
add %g1, KERNBASE >> (SRMMU_PGDIR_SHIFT - 2), %g3
sta %g2, [%g3] ASI_M_BYPASS ! place at KERNBASE entry
b go_to_highmem
nop ! wheee....
leon_remap:
/* Sanity-check, is MMU enabled */
lda [%g0] ASI_LEON_MMUREGS, %g1
andcc %g1, 1, %g0
be halt_notsup
nop
/* Same code as in the srmmu_not_viking case,
* with the LEON ASI for mmuregs
*/
set AC_M_CTPR, %g1
lda [%g1] ASI_LEON_MMUREGS, %g1 ! get ctx table ptr
sll %g1, 0x4, %g1 ! make physical addr
lda [%g1] ASI_M_BYPASS, %g1 ! ptr to level 1 pg_table
srl %g1, 0x4, %g1
sll %g1, 0x8, %g1 ! make phys addr for l1 tbl
lda [%g1] ASI_M_BYPASS, %g2 ! get level1 entry for 0x0
add %g1, KERNBASE >> (SRMMU_PGDIR_SHIFT - 2), %g3
sta %g2, [%g3] ASI_M_BYPASS ! place at KERNBASE entry
b go_to_highmem
nop ! wheee....
/* Now do a non-relative jump so that PC is in high-memory */
go_to_highmem:
set execute_in_high_mem, %g1
jmpl %g1, %g0
nop
/* The code above should be at beginning and we have to take care about
* short jumps, as branching to .init.text section from .text is usually
* impossible */
__INIT
/* Acquire boot time privileged register values, this will help debugging.
* I figure out and store nwindows and nwindowsm1 later on.
*/
execute_in_high_mem:
mov %l0, %o0 ! put back romvec
mov %l1, %o1 ! and debug_vec
sethi %hi(prom_vector_p), %g1
st %o0, [%g1 + %lo(prom_vector_p)]
sethi %hi(linux_dbvec), %g1
st %o1, [%g1 + %lo(linux_dbvec)]
/* Get the machine type via the romvec
* getprops node operation
*/
add %g7, 0x1c, %l1
ld [%l1], %l0
ld [%l0], %l0
call %l0
or %g0, %g0, %o0 ! next_node(0) = first_node
or %o0, %g0, %g6
sethi %hi(cputypvar), %o1 ! First node has cpu-arch
or %o1, %lo(cputypvar), %o1
sethi %hi(cputypval), %o2 ! information, the string
or %o2, %lo(cputypval), %o2
ld [%l1], %l0 ! 'compatible' tells
ld [%l0 + 0xc], %l0 ! that we want 'sun4x' where
call %l0 ! x is one of 'm', 'd' or 'e'.
nop ! %o2 holds pointer
! to a buf where above string
! will get stored by the prom.
/* Check value of "compatible" property.
* "value" => "model"
* leon => sparc_leon
* sun4m => sun4m
* sun4s => sun4m
* sun4d => sun4d
* sun4e => "no_sun4e_here"
* '*' => "no_sun4u_here"
* Check single letters only
*/
set cputypval, %o2
/* If cputypval[0] == 'l' (lower case letter L) this is leon */
ldub [%o2], %l1
cmp %l1, 'l'
be leon_init
nop
/* Check cputypval[4] to find the sun model */
ldub [%o2 + 0x4], %l1
cmp %l1, 'm'
be sun4m_init
cmp %l1, 's'
be sun4m_init
cmp %l1, 'd'
be sun4d_init
cmp %l1, 'e'
be no_sun4e_here ! Could be a sun4e.
nop
b no_sun4u_here ! AIEEE, a V9 sun4u... Get our BIG BROTHER kernel :))
nop
leon_init:
/* LEON CPU - set boot_cpu_id */
sethi %hi(boot_cpu_id), %g2 ! boot-cpu index
#ifdef CONFIG_SMP
ldub [%g2 + %lo(boot_cpu_id)], %g1
cmp %g1, 0xff ! unset means first CPU
bne leon_smp_cpu_startup ! continue only with master
nop
#endif
/* Get CPU-ID from most significant 4-bit of ASR17 */
rd %asr17, %g1
srl %g1, 28, %g1
/* Update boot_cpu_id only on boot cpu */
stub %g1, [%g2 + %lo(boot_cpu_id)]
ba continue_boot
nop
/* CPUID in bootbus can be found at PA 0xff0140000 */
#define SUN4D_BOOTBUS_CPUID 0xf0140000
sun4d_init:
/* Need to patch call to handler_irq */
set patch_handler_irq, %g4
set sun4d_handler_irq, %g5
sethi %hi(0x40000000), %g3 ! call
sub %g5, %g4, %g5
srl %g5, 2, %g5
or %g5, %g3, %g5
st %g5, [%g4]
#ifdef CONFIG_SMP
/* Get our CPU id out of bootbus */
set SUN4D_BOOTBUS_CPUID, %g3
lduba [%g3] ASI_M_CTL, %g3
and %g3, 0xf8, %g3
srl %g3, 3, %g4
sta %g4, [%g0] ASI_M_VIKING_TMP1
sethi %hi(boot_cpu_id), %g5
stb %g4, [%g5 + %lo(boot_cpu_id)]
#endif
/* Fall through to sun4m_init */
sun4m_init:
/* Ok, the PROM could have done funny things and apple cider could still
* be sitting in the fault status/address registers. Read them all to
* clear them so we don't get magic faults later on.
*/
/* This sucks, apparently this makes Vikings call prom panic, will fix later */
2:
rd %psr, %o1
srl %o1, PSR_IMPL_SHIFT, %o1 ! Get a type of the CPU
subcc %o1, PSR_IMPL_TI, %g0 ! TI: Viking or MicroSPARC
be continue_boot
nop
set AC_M_SFSR, %o0
lda [%o0] ASI_M_MMUREGS, %g0
set AC_M_SFAR, %o0
lda [%o0] ASI_M_MMUREGS, %g0
/* Fujitsu MicroSPARC-II has no asynchronous flavors of FARs */
subcc %o1, 0, %g0
be continue_boot
nop
set AC_M_AFSR, %o0
lda [%o0] ASI_M_MMUREGS, %g0
set AC_M_AFAR, %o0
lda [%o0] ASI_M_MMUREGS, %g0
nop
continue_boot:
/* Aieee, now set PC and nPC, enable traps, give ourselves a stack and it's
* show-time!
*/
/* Turn on Supervisor, EnableFloating, and all the PIL bits.
* Also puts us in register window zero with traps off.
*/
set (PSR_PS | PSR_S | PSR_PIL | PSR_EF), %g2
wr %g2, 0x0, %psr
WRITE_PAUSE
/* I want a kernel stack NOW! */
set init_thread_union, %g1
set (THREAD_SIZE - STACKFRAME_SZ), %g2
add %g1, %g2, %sp
mov 0, %fp /* And for good luck */
/* Zero out our BSS section. */
set __bss_start , %o0 ! First address of BSS
set _end , %o1 ! Last address of BSS
add %o0, 0x1, %o0
1:
stb %g0, [%o0]
subcc %o0, %o1, %g0
bl 1b
add %o0, 0x1, %o0
/* If boot_cpu_id has not been setup by machine specific
* init-code above we default it to zero.
*/
sethi %hi(boot_cpu_id), %g2
ldub [%g2 + %lo(boot_cpu_id)], %g3
cmp %g3, 0xff
bne 1f
nop
mov %g0, %g3
stub %g3, [%g2 + %lo(boot_cpu_id)]
1: sll %g3, 2, %g3
/* Initialize the uwinmask value for init task just in case.
* But first make current_set[boot_cpu_id] point to something useful.
*/
set init_thread_union, %g6
set current_set, %g2
#ifdef CONFIG_SMP
st %g6, [%g2]
add %g2, %g3, %g2
#endif
st %g6, [%g2]
st %g0, [%g6 + TI_UWINMASK]
/* Compute NWINDOWS and stash it away. Now uses %wim trick explained
* in the V8 manual. Ok, this method seems to work, Sparc is cool...
* No, it doesn't work, have to play the save/readCWP/restore trick.
*/
wr %g0, 0x0, %wim ! so we do not get a trap
WRITE_PAUSE
save
rd %psr, %g3
restore
and %g3, 0x1f, %g3
add %g3, 0x1, %g3
mov 2, %g1
wr %g1, 0x0, %wim ! make window 1 invalid
WRITE_PAUSE
cmp %g3, 0x7
bne 2f
nop
/* Adjust our window handling routines to
* do things correctly on 7 window Sparcs.
*/
#define PATCH_INSN(src, dest) \
set src, %g5; \
set dest, %g2; \
ld [%g5], %g4; \
st %g4, [%g2];
/* Patch for window spills... */
PATCH_INSN(spnwin_patch1_7win, spnwin_patch1)
PATCH_INSN(spnwin_patch2_7win, spnwin_patch2)
PATCH_INSN(spnwin_patch3_7win, spnwin_patch3)
/* Patch for window fills... */
PATCH_INSN(fnwin_patch1_7win, fnwin_patch1)
PATCH_INSN(fnwin_patch2_7win, fnwin_patch2)
/* Patch for trap entry setup... */
PATCH_INSN(tsetup_7win_patch1, tsetup_patch1)
PATCH_INSN(tsetup_7win_patch2, tsetup_patch2)
PATCH_INSN(tsetup_7win_patch3, tsetup_patch3)
PATCH_INSN(tsetup_7win_patch4, tsetup_patch4)
PATCH_INSN(tsetup_7win_patch5, tsetup_patch5)
PATCH_INSN(tsetup_7win_patch6, tsetup_patch6)
/* Patch for returning from traps... */
PATCH_INSN(rtrap_7win_patch1, rtrap_patch1)
PATCH_INSN(rtrap_7win_patch2, rtrap_patch2)
PATCH_INSN(rtrap_7win_patch3, rtrap_patch3)
PATCH_INSN(rtrap_7win_patch4, rtrap_patch4)
PATCH_INSN(rtrap_7win_patch5, rtrap_patch5)
/* Patch for killing user windows from the register file. */
PATCH_INSN(kuw_patch1_7win, kuw_patch1)
/* Now patch the kernel window flush sequences.
* This saves 2 traps on every switch and fork.
*/
set 0x01000000, %g4
set flush_patch_one, %g5
st %g4, [%g5 + 0x18]
st %g4, [%g5 + 0x1c]
set flush_patch_two, %g5
st %g4, [%g5 + 0x18]
st %g4, [%g5 + 0x1c]
set flush_patch_three, %g5
st %g4, [%g5 + 0x18]
st %g4, [%g5 + 0x1c]
set flush_patch_four, %g5
st %g4, [%g5 + 0x18]
st %g4, [%g5 + 0x1c]
set flush_patch_exception, %g5
st %g4, [%g5 + 0x18]
st %g4, [%g5 + 0x1c]
set flush_patch_switch, %g5
st %g4, [%g5 + 0x18]
st %g4, [%g5 + 0x1c]
2:
sethi %hi(nwindows), %g4
st %g3, [%g4 + %lo(nwindows)] ! store final value
sub %g3, 0x1, %g3
sethi %hi(nwindowsm1), %g4
st %g3, [%g4 + %lo(nwindowsm1)]
/* Here we go, start using Linux's trap table... */
set trapbase, %g3
wr %g3, 0x0, %tbr
WRITE_PAUSE
/* Finally, turn on traps so that we can call c-code. */
rd %psr, %g3
wr %g3, 0x0, %psr
WRITE_PAUSE
wr %g3, PSR_ET, %psr
WRITE_PAUSE
/* Call sparc32_start_kernel(struct linux_romvec *rp) */
sethi %hi(prom_vector_p), %g5
ld [%g5 + %lo(prom_vector_p)], %o0
call sparc32_start_kernel
nop
/* We should not get here. */
call halt_me
nop
no_sun4e_here:
ld [%g7 + 0x68], %o1
set sun4e_notsup, %o0
call %o1
nop
b halt_me
nop
__INITDATA
sun4u_1:
.asciz "finddevice"
.align 4
sun4u_2:
.asciz "/chosen"
.align 4
sun4u_3:
.asciz "getprop"
.align 4
sun4u_4:
.asciz "stdout"
.align 4
sun4u_5:
.asciz "write"
.align 4
sun4u_6:
.asciz "\n\rOn sun4u you have to use sparc64 kernel\n\rand not a sparc32 version\n\r\n\r"
sun4u_6e:
.align 4
sun4u_7:
.asciz "exit"
.align 8
sun4u_a1:
.word 0, sun4u_1, 0, 1, 0, 1, 0, sun4u_2, 0
sun4u_r1:
.word 0
sun4u_a2:
.word 0, sun4u_3, 0, 4, 0, 1, 0
sun4u_i2:
.word 0, 0, sun4u_4, 0, sun4u_1, 0, 8, 0
sun4u_r2:
.word 0
sun4u_a3:
.word 0, sun4u_5, 0, 3, 0, 1, 0
sun4u_i3:
.word 0, 0, sun4u_6, 0, sun4u_6e - sun4u_6 - 1, 0
sun4u_r3:
.word 0
sun4u_a4:
.word 0, sun4u_7, 0, 0, 0, 0
sun4u_r4:
__INIT
no_sun4u_here:
set sun4u_a1, %o0
set current_pc, %l2
cmp %l2, %g3
be 1f
mov %o4, %l0
sub %g3, %l2, %l6
add %o0, %l6, %o0
mov %o0, %l4
mov sun4u_r4 - sun4u_a1, %l3
ld [%l4], %l5
2:
add %l4, 4, %l4
cmp %l5, %l2
add %l5, %l6, %l5
bgeu,a 3f
st %l5, [%l4 - 4]
3:
subcc %l3, 4, %l3
bne 2b
ld [%l4], %l5
1:
call %l0
mov %o0, %l1
ld [%l1 + (sun4u_r1 - sun4u_a1)], %o1
add %l1, (sun4u_a2 - sun4u_a1), %o0
call %l0
st %o1, [%o0 + (sun4u_i2 - sun4u_a2)]
ld [%l1 + (sun4u_1 - sun4u_a1)], %o1
add %l1, (sun4u_a3 - sun4u_a1), %o0
call %l0
st %o1, [%o0 + (sun4u_i3 - sun4u_a3)]
call %l0
add %l1, (sun4u_a4 - sun4u_a1), %o0
/* Not reached */
halt_me:
ld [%g7 + 0x74], %o0
call %o0 ! Get us out of here...
nop ! Apparently Solaris is better.
/* Ok, now we continue in the .data/.text sections */
.data
.align 4
/*
* Fill up the prom vector, note in particular the kind first element,
* no joke. I don't need all of them in here as the entire prom vector
* gets initialized in c-code so all routines can use it.
*/
prom_vector_p:
.word 0
/* We calculate the following at boot time, window fills/spills and trap entry
* code uses these to keep track of the register windows.
*/
.align 4
.globl nwindows
.globl nwindowsm1
nwindows:
.word 8
nwindowsm1:
.word 7
/* Boot time debugger vector value. We need this later on. */
.align 4
.globl linux_dbvec
linux_dbvec:
.word 0
.word 0
.align 8
.globl lvl14_save
lvl14_save:
.word 0
.word 0
.word 0
.word 0
.word t_irq14
Reference in New Issue View Git Blame Copy Permalink