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2003-08-20 Chris Demetriou <cgd@broadcom.com>

Browse Source 
* mips/crt0_cfe.S: New file.
        * mips/cfe_mem.c: New file.
        * mips/cfe_prestart.S: Remove.
        * mips/cfe.ld: Adjust to use crt0_cfe.o as the startup file, and
        and use _start as the entry point.  Align BSS to 32-byte boundary.
        * mips/cfe.c: Reimplement to fit on top of a crt0_cfe.o file.
        * mips/cfe_api.h (__libcfe_stack_size, __libcfe_mem_limit)
        (__libcfe_meminit, __libcfe_stack_top): New prototypes.
        * mips/Makefile.in (CFEOBJS): Replace cfe_prestart.o with cfe_mem.o.
        (cfe.o, cfe_api.o, cfe_mem.o, crt0_cfe.o): New targets.
        * mips/configure.in: Build and install crt0_cfe.o when CFE support
        is built.
        * mips/configure: Regenerate.
This commit is contained in:
Jeff Johnston
2003-08-20 19:32:52 +00:00
parent 2bf794af9a
commit 49703eb3f5
10 changed files with 502 additions and 180 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
libgloss/ChangeLog
View File

@@ -1,3 +1,19 @@
2003-08-20 Chris Demetriou <cgd@broadcom.com>
* mips/crt0_cfe.S: New file.
* mips/cfe_mem.c: New file.
* mips/cfe_prestart.S: Remove.
* mips/cfe.ld: Adjust to use crt0_cfe.o as the startup file, and
and use _start as the entry point. Align BSS to 32-byte boundary.
* mips/cfe.c: Reimplement to fit on top of a crt0_cfe.o file.
* mips/cfe_api.h (__libcfe_stack_size, __libcfe_mem_limit)
(__libcfe_meminit, __libcfe_stack_top): New prototypes.
* mips/Makefile.in (CFEOBJS): Replace cfe_prestart.o with cfe_mem.o.
(cfe.o, cfe_api.o, cfe_mem.o, crt0_cfe.o): New targets.
* mips/configure.in: Build and install crt0_cfe.o when CFE support
is built.
* mips/configure: Regenerate.
2003-08-12 Jeff Johnston <jjohnstn@redhat.com>
* i386/cygmon-salib.c (unlink): New stub.

11
libgloss/mips/Makefile.in
View File

@@ -73,8 +73,7 @@ PMONOBJS = pmon.o @part_specific_obj@ ${GENOBJS}
LSIOBJS = lsipmon.o @part_specific_obj@ ${GENOBJS}
DVEOBJS = dvemon.o @part_specific_obj@ ${GENOBJS} ${GENOBJS2}
JMR3904OBJS = jmr3904-io.o @part_specific_obj@ ${GENOBJS} ${GENOBJS2}
CFEOBJS = cfe.o cfe_api.o cfe_prestart.o \
@part_specific_obj@ ${GENOBJS} ${GENOBJS2}
CFEOBJS = cfe.o cfe_api.o cfe_mem.o @part_specific_obj@ ${GENOBJS} ${GENOBJS2}
CYGMONOBJS = open.o close.o cygmon.o @part_specific_obj@ ${GENOBJS}
# Nullmon cannot support read and write, but the test cases pull them in via libs
@@ -136,7 +135,6 @@ libcygmon.a: $(CYGMONOBJS)
${AR} ${ARFLAGS} $@ $(CYGMONOBJS)
${RANLIB} $@
libcfe.a: $(CFEOBJS)
${AR} ${ARFLAGS} $@ $(CFEOBJS)
${RANLIB} $@
@@ -219,6 +217,7 @@ test.o: ${srcdir}/test.c
crt0.o: ${srcdir}/crt0.S
pcrt0.o: ${srcdir}/crt0.S
$(CC) -c $(CFLAGS_FOR_TARGET) $(CFLAGS) -DGCRT0 ${srcdir}/crt0.S -o ${PCRT0}
crt0_cfe.o: ${srcdir}/crt0_cfe.S
crt0_cygmon.o: ${srcdir}/crt0_cygmon.S
idtmon.o: ${srcdir}/idtmon.S
pmon.o: ${srcdir}/pmon.S
@@ -230,6 +229,12 @@ vr5xxx.o: ${srcdir}/vr5xxx.S
lsipmon.o: $(srcdir)/lsipmon.S $(srcdir)/pmon.S
jmr3904-io.o: ${srcdir}/jmr3904-io.c
$(CC) -c $(CFLAGS_FOR_TARGET) $(CFLAGS) ${srcdir}/jmr3904-io.c -o $@
cfe.o: ${srcdir}/cfe.c ${srcdir}/cfe_api.h
$(CC) -c $(CFLAGS_FOR_TARGET) $(CFLAGS) ${srcdir}/cfe.c -o $@
cfe_api.o: ${srcdir}/cfe_api.c ${srcdir}/cfe_api.h ${srcdir}/cfe_api_int.h
$(CC) -c $(CFLAGS_FOR_TARGET) $(CFLAGS) ${srcdir}/cfe_api.c -o $@
cfe_mem.o: ${srcdir}/cfe_mem.c ${srcdir}/cfe_api.h
$(CC) -c $(CFLAGS_FOR_TARGET) $(CFLAGS) ${srcdir}/cfe_mem.c -o $@
# cma101 can not be compiled mips16, if a mips16 version is needed then
# it will have to be built, then this rule can be scrapped, allowing

88
libgloss/mips/cfe.c
View File

@@ -1,7 +1,7 @@
/* cfe.c -- I/O code for the MIPS boards running CFE. */
/*
* Copyright 2001, 2002
* Copyright 2001, 2002, 2003
* Broadcom Corporation. All rights reserved.
*
* This software is furnished under license and may be used and copied only
@@ -32,37 +32,40 @@
#include "cfe_api.h"
void *__libcfe_init (long handle, long a1, long cfe_entrypoint, long a3);
void __libcfe_exit (long status);
char inbyte (void);
int outbyte (char c);
/* Make sure cfe_prestart is used. It doesn't look like setting the
entry symbol in the linker script to a symbol from that fiel will do
this! */
extern int _prestart;
static void *force_prestart = &_prestart;
/* The following variables are initialized to non-zero so that they'll be
in data, rather than BSS. Used to be that you could init variables to
any value to put them into initialized data sections rather than BSS,
but that decades-old idiom went out the window with gcc 3.2. Now,
either you compile specially (with -fno-zero-initialized-in-bss), or
you init to non-zero. In this case, initting to non-zero is OK (and
even beneficial; alignment fault via jump to odd if not properly
set up by _prestart()), so we do the latter.
These variables are 'int's so they can be reliably stored w/ "sw".
(longs fall victim to -mlong64.) They are signed so that they remain
valid pointers when extended to cfe_xuint_t in the call to cfe_init().
This assumes that they are compatibility-space pointers. */
int __cfe_handle = 0xdeadbeef;
int __cfe_entrypt = 0xdeadbeef;
/* Echo input characters? */
int __cfe_echo_input = 0;
int __libcfe_echo_input = 0;
/* CFE handle used to access console device. */
static int cfe_conshandle;
/* Initialize firmware callbacks. Called from crt0_cfe. Returns desired
stack pointer. */
void *
__libcfe_init (long handle, long a1, long entrypoint, long a3)
{
cfe_init (handle, entrypoint);
cfe_conshandle = cfe_getstdhandle (CFE_STDHANDLE_CONSOLE);
__libcfe_meminit ();
return __libcfe_stack_top ();
}
/* Exit back to monitor, with the given status code. */
void
__libcfe_exit (long status)
{
outbyte ('\r');
outbyte ('\n');
cfe_exit (CFE_FLG_WARMSTART, status);
}
char
inbyte (void)
{
@@ -73,7 +76,7 @@ inbyte (void)
;
if (c == '\r')
c = '\n';
if (__cfe_echo_input)
if (__libcfe_echo_input)
outbyte (c);
return c;
}
@@ -93,41 +96,6 @@ outbyte (char c)
return 0;
}
/* Initialize hardware. Called from crt0. */
void
hardware_init_hook(void)
{
cfe_init (__cfe_handle, __cfe_entrypt);
cfe_conshandle = cfe_getstdhandle(CFE_STDHANDLE_CONSOLE);
}
/* Exit back to monitor, with the given status code. */
void
hardware_exit_hook (int status)
{
outbyte ('\r');
outbyte ('\n');
cfe_exit (CFE_FLG_WARMSTART, status);
}
/* Structure filled in by get_mem_info. Only the size field is
actually used (by sbrk), so the others aren't even filled in. */
struct s_mem
{
unsigned int size;
unsigned int icsize;
unsigned int dcsize;
};
void
get_mem_info (mem)
struct s_mem *mem;
{
/* XXX FIXME: Fake this for now. Should invoke cfe_enummem, but we
don't have enough stack to do that (yet). */
mem->size = 0x4000000; /* Assume 64 MB of RAM */
}
/* This is the MIPS cache flush function call. No defines are provided
by libgloss for 'cache', and CFE doesn't let you flush ranges, so
we just flush all I & D for every call. */

5
libgloss/mips/cfe.ld
View File

@@ -1,8 +1,8 @@
/* The following TEXT start address leaves space for the monitor
workspace. */
ENTRY(_prestart)
STARTUP(crt0.o)
ENTRY(_start)
STARTUP(crt0_cfe.o)
OUTPUT_FORMAT("elf32-bigmips", "elf32-bigmips", "elf32-littlemips")
GROUP(-lc -lcfe -lgcc)
SEARCH_DIR(.)
@@ -127,6 +127,7 @@ SECTIONS
*(COMMON)
}
. = ALIGN(32);
PROVIDE (end = .);
_end = .;

34
libgloss/mips/cfe_api.h
View File

@@ -71,6 +71,40 @@ typedef unsigned _POINTER_INT uintptr_t;
#define CFE_API_ALL
#define CFE_API_IMPL_NAMESPACE
/* Return the stack size to be used for the program. Normally 32KB. The
normal memory allocator uses the bottom of the stack as its heap limit,
so if your application uses a lot of stack space define this function
appropriately to keep the heap from growing into the stack. */
unsigned long __libcfe_stack_size(void) __attribute__((__weak__));
/* Return the (max address + 1) to be used by this program. (This address
minus '_end' is used as the heap size, so the address should be in the
same address space segments as _end. The normal memory allocator
queries CFE to determine the available memory. */
void *__libcfe_mem_limit(void) __attribute__((__weak__));
/* If the configuration ability provided by __libcfe_mem_limit() and
__libcfe_stack_size() do not provide enough flexibility for your
application's memory allocation needs, you can replace the normal
low-level allocator by providing the functions listed below and
also the function:
void *sbrk(ptrdiff_t incr);
If you provide any of these functions, you should provide all three,
and be sure to link them into your application as a .o file (rather
than a .a).
__libcfe_meminit() is responsible for initializing the low-level
memory allocator.
__libcfe_stack_top() returns a pointer to the top (highest address;
the stack grows down from that address) of the stack to be used by
the program. */
void __libcfe_meminit (void);
void *__libcfe_stack_top (void);
/* End customization. */

130
libgloss/mips/cfe_mem.c Normal file
View File

@@ -0,0 +1,130 @@
/* cfe_mem.c -- Replaceable memory management hooks for MIPS boards
running CFE. */
/*
* Copyright 2003
* Broadcom Corporation. All rights reserved.
*
* This software is furnished under license and may be used and copied only
* in accordance with the following terms and conditions. Subject to these
* conditions, you may download, copy, install, use, modify and distribute
* modified or unmodified copies of this software in source and/or binary
* form. No title or ownership is transferred hereby.
*
* 1) Any source code used, modified or distributed must reproduce and
* retain this copyright notice and list of conditions as they appear in
* the source file.
*
* 2) No right is granted to use any trade name, trademark, or logo of
* Broadcom Corporation. The "Broadcom Corporation" name may not be
* used to endorse or promote products derived from this software
* without the prior written permission of Broadcom Corporation.
*
* 3) THIS SOFTWARE IS PROVIDED "AS-IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
* NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL BROADCOM BE LIABLE
* FOR ANY DAMAGES WHATSOEVER, AND IN PARTICULAR, BROADCOM SHALL NOT BE
* LIABLE FOR DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
*/
#include "cfe_api.h"
/* Structure filled in by get_mem_info. Only the size field is
actually used (by sbrk), so the others aren't even filled in.
Note that 'size' is the __size__ of the heap starting at _end! */
struct s_mem {
unsigned int size;
unsigned int icsize;
unsigned int dcsize;
};
void *get_mem_info (struct s_mem *);
extern char _end[];
/* Address immediately after available memory. */
static unsigned long memtop;
/* Program stack size. */
static unsigned long stack_size;
void
__libcfe_meminit (void)
{
/* If the user has provided a memory-limit function, use it to
determine the end of usable memory. */
if (&__libcfe_mem_limit != NULL)
memtop = __libcfe_mem_limit ();
else
{
uint64_t start, length, type;
int i, rv;
long end_segbits, end_pa;
/* Note that this only works if _end and the program live in kseg0
or kseg1. Not a problem with the default linker script, but
if you're writing your own, keep it in mind. For more complex
memory allocation needs, you're encouraged to copy this file
and syscalls.c (for sbrk()), and reimplement as appropriate. */
end_segbits = (long)_end & ~ 0x1fffffffL;
end_pa = (long)_end & 0x1fffffffL;
for (i = 0; ; i++)
{
rv = cfe_enummem(i, 0, &start, &length, &type);
if (rv < 0)
{
/* Did not find an available entry containing _end.
Assume a minimal amount of memory (1MB). */
memtop = _end + (1 * 1024 * 1024);
break;
}
/* If not available, try the next. */
if (type != CFE_MI_AVAILABLE)
continue;
/* If end_pa is between start and (start + length) then we have
a winner. */
if (end_pa >= start && end_pa < (start + length))
{
memtop = (start + length) | end_segbits;
break;
}
}
}
/* If the user has provided a memory-limit function, use it to
determine the end of usable memory. */
if (&__libcfe_stack_size != NULL)
stack_size = __libcfe_stack_size ();
else
stack_size = (32 * 1024); /* Default = 32KB. */
/* Chop the top of memory to a 32-byte aligned location, and
round the stack size up to a 32-byte multiple. */
memtop = memtop & ~(unsigned long)31;
stack_size = (stack_size + 31) & ~(unsigned long)31;
}
void *
__libcfe_stack_top (void)
{
/* Grow down from the top of available memory. Obviously, if
code writes above this limit, problems could result! */
return (void *) memtop;
}
/* For compatibility, get_mem_info returns the top of memory
(i.e., the stack address). Nothing actually uses that,
though. */
void *
get_mem_info (struct s_mem *meminfo)
{
meminfo->size = (char *)(memtop - stack_size) - _end;
return (void *) memtop;
}

86
libgloss/mips/cfe_prestart.S
View File

@@ -1,86 +0,0 @@
/*
* cfe_prestart.S -- startup file for MIPS running CFE.
* Derived from crt0.S.
*
* Copyright (c) 1995, 1996, 1997 Cygnus Support
*
* The authors hereby grant permission to use, copy, modify, distribute,
* and license this software and its documentation for any purpose, provided
* that existing copyright notices are retained in all copies and that this
* notice is included verbatim in any distributions. No written agreement,
* license, or royalty fee is required for any of the authorized uses.
* Modifications to this software may be copyrighted by their authors
* and need not follow the licensing terms described here, provided that
* the new terms are clearly indicated on the first page of each file where
* they apply.
*/
#ifdef __mips16
/* This file contains 32 bit assembly code. */
.set nomips16
#endif
#include "regs.S"
/* This is for referencing addresses that are not in the .sdata or
.sbss section under embedded-pic, or before we've set up gp. */
#ifdef __mips_embedded_pic
# ifdef __mips64
# define LA(t,x) la t,x-PICBASE ; daddu t,s0,t
# else
# define LA(t,x) la t,x-PICBASE ; addu t,s0,t
# endif
#else /* __mips_embedded_pic */
# define LA(t,x) la t,x
#endif /* __mips_embedded_pic */
.globl __cfe_handle
.globl __cfe_entrypt
.text
.align 2
.globl _prestart
.ent _prestart
_prestart:
.set noreorder
#ifdef __mips_embedded_pic
PICBASE = .+8
bal PICBASE
nop
move s0,$31
#endif
/* These are actually pointers, but they're guaranteed to be
in compatibility space and it's just easier to store them
as words ("unsigned int") than worry about the actual
pointer size of the runtime we're building. */
LA (v0, __cfe_handle)
sw a0, 0(v0)
LA (v0, __cfe_entrypt)
sw a2, 0(v0)
LA (v0, _start)
jr v0
nop
.end _prestart
/* Avoid worst-case execution hazards. This is targetted at the SB-1
pipe, and is much worse than it needs to be (not even counting
the subroutine call and return). */
.globl hardware_hazard_hook
.ent hardware_hazard_hook
hardware_hazard_hook:
.set push
.set mips32
.set noreorder
ssnop
ssnop
ssnop
bnel $0, $0, .+4
ssnop
j ra
nop
.set pop
.end hardware_hazard_hook

36
libgloss/mips/configure vendored
View File

@@ -28,7 +28,6 @@ program_suffix=NONE
program_transform_name=s,x,x,
silent=
site=
sitefile=
srcdir=
target=NONE
verbose=
@@ -143,7 +142,6 @@ Configuration:
--help print this message
--no-create do not create output files
--quiet, --silent do not print \`checking...' messages
--site-file=FILE use FILE as the site file
--version print the version of autoconf that created configure
Directory and file names:
--prefix=PREFIX install architecture-independent files in PREFIX
@@ -314,11 +312,6 @@ EOF
-site=* | --site=* | --sit=*)
site="$ac_optarg" ;;
-site-file | --site-file | --site-fil | --site-fi | --site-f)
ac_prev=sitefile ;;
-site-file=* | --site-file=* | --site-fil=* | --site-fi=* | --site-f=*)
sitefile="$ac_optarg" ;;
-srcdir | --srcdir | --srcdi | --srcd | --src | --sr)
ac_prev=srcdir ;;
-srcdir=* | --srcdir=* | --srcdi=* | --srcd=* | --src=* | --sr=*)
@@ -484,7 +477,6 @@ fi
srcdir=`echo "${srcdir}" | sed 's%\([^/]\)/*$%\1%'`
# Prefer explicitly selected file to automatically selected ones.
if test -z "$sitefile"; then
if test -z "$CONFIG_SITE"; then
if test "x$prefix" != xNONE; then
CONFIG_SITE="$prefix/share/config.site $prefix/etc/config.site"
@@ -492,9 +484,6 @@ if test -z "$sitefile"; then
CONFIG_SITE="$ac_default_prefix/share/config.site $ac_default_prefix/etc/config.site"
fi
fi
else
CONFIG_SITE="$sitefile"
fi
for ac_site_file in $CONFIG_SITE; do
if test -r "$ac_site_file"; then
echo "loading site script $ac_site_file"
@@ -594,7 +583,7 @@ else { echo "configure: error: can not run $ac_config_sub" 1>&2; exit 1; }
fi
echo $ac_n "checking host system type""... $ac_c" 1>&6
echo "configure:598: checking host system type" >&5
echo "configure:587: checking host system type" >&5
host_alias=$host
case "$host_alias" in
@@ -615,7 +604,7 @@ host_os=`echo $host | sed 's/^\([^-]*\)-\([^-]*\)-\(.*\)$/\3/'`
echo "$ac_t""$host" 1>&6
echo $ac_n "checking target system type""... $ac_c" 1>&6
echo "configure:619: checking target system type" >&5
echo "configure:608: checking target system type" >&5
target_alias=$target
case "$target_alias" in
@@ -633,7 +622,7 @@ target_os=`echo $target | sed 's/^\([^-]*\)-\([^-]*\)-\(.*\)$/\3/'`
echo "$ac_t""$target" 1>&6
echo $ac_n "checking build system type""... $ac_c" 1>&6
echo "configure:637: checking build system type" >&5
echo "configure:626: checking build system type" >&5
build_alias=$build
case "$build_alias" in
@@ -687,7 +676,7 @@ test "$program_transform_name" = "" && program_transform_name="s,x,x,"
# SVR4 /usr/ucb/install, which tries to use the nonexistent group "staff"
# ./install, which can be erroneously created by make from ./install.sh.
echo $ac_n "checking for a BSD compatible install""... $ac_c" 1>&6
echo "configure:691: checking for a BSD compatible install" >&5
echo "configure:680: checking for a BSD compatible install" >&5
if test -z "$INSTALL"; then
if eval "test \"`echo '$''{'ac_cv_path_install'+set}'`\" = set"; then
echo $ac_n "(cached) $ac_c" 1>&6
@@ -751,7 +740,7 @@ test -z "$INSTALL_DATA" && INSTALL_DATA='${INSTALL} -m 644'
# Extract the first word of "gcc", so it can be a program name with args.
set dummy gcc; ac_word=$2
echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
echo "configure:755: checking for $ac_word" >&5
echo "configure:744: checking for $ac_word" >&5
if eval "test \"`echo '$''{'ac_cv_prog_CC'+set}'`\" = set"; then
echo $ac_n "(cached) $ac_c" 1>&6
else
@@ -781,7 +770,7 @@ if test -z "$CC"; then
# Extract the first word of "cc", so it can be a program name with args.
set dummy cc; ac_word=$2
echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
echo "configure:785: checking for $ac_word" >&5
echo "configure:774: checking for $ac_word" >&5
if eval "test \"`echo '$''{'ac_cv_prog_CC'+set}'`\" = set"; then
echo $ac_n "(cached) $ac_c" 1>&6
else
@@ -830,7 +819,7 @@ fi
fi
echo $ac_n "checking whether we are using GNU C""... $ac_c" 1>&6
echo "configure:834: checking whether we are using GNU C" >&5
echo "configure:823: checking whether we are using GNU C" >&5
if eval "test \"`echo '$''{'ac_cv_prog_gcc'+set}'`\" = set"; then
echo $ac_n "(cached) $ac_c" 1>&6
else
@@ -839,7 +828,7 @@ else
yes;
#endif
EOF
if { ac_try='${CC-cc} -E conftest.c'; { (eval echo configure:843: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; } | egrep yes >/dev/null 2>&1; then
if { ac_try='${CC-cc} -E conftest.c'; { (eval echo configure:832: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; } | egrep yes >/dev/null 2>&1; then
ac_cv_prog_gcc=yes
else
ac_cv_prog_gcc=no
@@ -854,7 +843,7 @@ if test $ac_cv_prog_gcc = yes; then
ac_save_CFLAGS="$CFLAGS"
CFLAGS=
echo $ac_n "checking whether ${CC-cc} accepts -g""... $ac_c" 1>&6
echo "configure:858: checking whether ${CC-cc} accepts -g" >&5
echo "configure:847: checking whether ${CC-cc} accepts -g" >&5
if eval "test \"`echo '$''{'ac_cv_prog_cc_g'+set}'`\" = set"; then
echo $ac_n "(cached) $ac_c" 1>&6
else
@@ -890,7 +879,7 @@ LD=${LD-ld}
# Extract the first word of "ranlib", so it can be a program name with args.
set dummy ranlib; ac_word=$2
echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
echo "configure:894: checking for $ac_word" >&5
echo "configure:883: checking for $ac_word" >&5
if eval "test \"`echo '$''{'ac_cv_prog_RANLIB'+set}'`\" = set"; then
echo $ac_n "(cached) $ac_c" 1>&6
else
@@ -930,7 +919,7 @@ case "${target}" in
;;
mipsisa32-*-* | mipsisa32el-*-* | \
mipsisa32r2-*-* | mipsisa32r2el-*-*)
crt0="crt0_cygmon.o crt0.o"
crt0="crt0_cfe.o crt0_cygmon.o crt0.o"
pcrt0="pcrt0.o"
part_specific_obj=
part_specific_defines=
@@ -955,6 +944,7 @@ case "${target}" in
bsp_list="libpmon.a libnullmon.a"
;;
*)
crt0="crt0_cfe.o crt0.o"
part_specific_obj="vr4300.o cma101.o"
part_specific_defines=
script_list="idt pmon ddb ddb-kseg0 lsi cfe idtecoff nullmon"
@@ -1166,7 +1156,7 @@ cat >> $CONFIG_STATUS <<\EOF
# Split the substitutions into bite-sized pieces for seds with
# small command number limits, like on Digital OSF/1 and HP-UX.
ac_max_sed_cmds=60 # Maximum number of lines to put in a sed script.
ac_max_sed_cmds=90 # Maximum number of lines to put in a sed script.
ac_file=1 # Number of current file.
ac_beg=1 # First line for current file.
ac_end=$ac_max_sed_cmds # Line after last line for current file.

3
libgloss/mips/configure.in
View File

@@ -94,7 +94,7 @@ case "${target}" in
;;
mipsisa32-*-* | mipsisa32el-*-* | \
mipsisa32r2-*-* | mipsisa32r2el-*-*)
crt0="crt0_cygmon.o crt0.o"
crt0="crt0_cfe.o crt0_cygmon.o crt0.o"
pcrt0="pcrt0.o"
part_specific_obj=
part_specific_defines=
@@ -119,6 +119,7 @@ case "${target}" in
bsp_list="libpmon.a libnullmon.a"
;;
*)
crt0="crt0_cfe.o crt0.o"
part_specific_obj="vr4300.o cma101.o"
part_specific_defines=
script_list="idt pmon ddb ddb-kseg0 lsi cfe idtecoff nullmon"

263
libgloss/mips/crt0_cfe.S Normal file
View File

@@ -0,0 +1,263 @@
/*
* crt0_cfe.S -- Runtime startup for MIPS targets running CFE.
*
* Copyright 2003
* Broadcom Corporation. All rights reserved.
*
* This software is furnished under license and may be used and copied only
* in accordance with the following terms and conditions. Subject to these
* conditions, you may download, copy, install, use, modify and distribute
* modified or unmodified copies of this software in source and/or binary
* form. No title or ownership is transferred hereby.
*
* 1) Any source code used, modified or distributed must reproduce and
* retain this copyright notice and list of conditions as they appear in
* the source file.
*
* 2) No right is granted to use any trade name, trademark, or logo of
* Broadcom Corporation. The "Broadcom Corporation" name may not be
* used to endorse or promote products derived from this software
* without the prior written permission of Broadcom Corporation.
*
* 3) THIS SOFTWARE IS PROVIDED "AS-IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
* NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL BROADCOM BE LIABLE
* FOR ANY DAMAGES WHATSOEVER, AND IN PARTICULAR, BROADCOM SHALL NOT BE
* LIABLE FOR DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE), EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Derived from crt0_cygmon.S:
*
* Copyright (c) 1995, 1996, 1997, 2000 Red Hat, Inc.
*
* The authors hereby grant permission to use, copy, modify, distribute,
* and license this software and its documentation for any purpose, provided
* that existing copyright notices are retained in all copies and that this
* notice is included verbatim in any distributions. No written agreement,
* license, or royalty fee is required for any of the authorized uses.
* Modifications to this software may be copyrighted by their authors
* and need not follow the licensing terms described here, provided that
* the new terms are clearly indicated on the first page of each file where
* they apply.
*/
/*
* This file does minimal runtime startup for code running under
* CFE firmware.
*
* It does minimal hardware initialization. In particular
* it sets Status:FR to match the requested floating point
* mode.
*
* It is meant to be linked with the other files provided by libcfe.a,
* and calls routines in those files.
*/
#ifdef __mips16
/* This file contains 32 bit assembly code. */
.set nomips16
#endif
#ifdef __mips_embedded_pic
# error -membedded-pic is not supported.
#endif
#include "regs.S"
/*
* Set up some room for a stack. We just grab a chunk of memory.
*/
#define STARTUP_STACK_SIZE (1 * 1024)
.comm _lstack, STARTUP_STACK_SIZE
.text
.align 4
/*
* Without the following nop, GDB thinks _start is a data variable.
* This is probably a bug in GDB in handling a symbol that is at the
* start of the .text section.
*/
nop
/*
* On entry, the following values have been passed in registers
* by the firmware:
*
* a0: firmware handle
* a1: zero (unused)
* a2: firmware callback entrypoint
* a3: CFE entrypoint seal (unused)
*
* They must be preserved until the CFE entrypoint and handle
* are passed to __libcfe_init().
*/
.globl _start
.ent _start
_start:
.set noreorder
/* Set the global data pointer, defined in the linker script. */
la gp, _gp
#ifndef __mips_soft_float
/* If compiled for hard float, set the FPU mode based on the
compilation flags. Note that this assumes that enough code
will run after the mtc0 to clear any hazards. */
mfc0 t0, C0_SR
or t0, t0, (SR_CU1 | SR_FR)
#if (__mips_fpr == 32)
xor t0, t0, SR_FR /* If 32-bit FP mode, clear FR. */
#endif
mtc0 t0, C0_SR
#endif
.end _start
/*
* zero out the bss section.
*/
.globl _zerobss
.ent _zerobss
_zerobss:
/* These variables are defined in the linker script. */
la v0, _fbss
la v1, _end
3:
sw zero, 0(v0)
bltu v0, v1, 3b
addiu v0, v0, 4 /* Delay slot. */
.end _zerobss
/*
* Setup a small stack so we can run some C code, and do
* the library initialization. (32 bytes are saved for
* the argument registers' stack slots.)
*/
.globl _stackinit
.ent _stackinit
_stackinit:
la t0, _lstack
addiu sp, t0, (STARTUP_STACK_SIZE - 32)
jal __libcfe_init
nop
/*
* Setup the stack pointer --
* __libcfe_init() returns the value to be used as the top of
* the program's stack.
*
* We subtract 32 bytes for the 4 argument registers, in case
* main() wants to write them back to the stack. The caller
* allocates stack space for parameters in the old MIPS ABIs.
* We must do this even though we aren't passing arguments,
* because main might be declared to have them.)
*
* We subtract 32 more bytes for the argv/envp setup for the
* call to main().
*/
subu v0, v0, 64
move sp, v0
.end _stackinit
/*
* initialize target specific stuff. Only execute these
* functions it they exist.
*/
.globl hardware_init_hook .text
.globl software_init_hook .text
.type _fini,@function
.type _init,@function
.globl atexit .text
.globl exit .text
.globl _crt0init
.ent _crt0init
_crt0init:
la t9, hardware_init_hook # init the hardware if needed
beq t9, zero, 6f
nop
jal t9
nop
6:
la t9, software_init_hook # init the software if needed
beq t9, zero, 7f
nop
jal t9
nop
7:
la a0, _fini
jal atexit
nop
#ifdef GCRT0
.globl _ftext
.globl _extext
la a0, _ftext
la a1, _etext
jal monstartup
nop
#endif
jal _init # run global constructors
nop
addiu a1,sp,32 # argv = sp + 32
addiu a2,sp,40 # envp = sp + 40
#if __mips64
sd zero,(a1) # argv[argc] = 0
sd zero,(a2) # envp[0] = 0
#else
sw zero,(a1)
sw zero,(a2)
#endif
jal main # call the program start function
move a0,zero # set argc to 0; delay slot.
# fall through to the "exit" routine
jal exit # call libc exit to run the G++
# destructors
move a0, v0 # pass through the exit code
.end _crt0init
/*
* _exit -- Exit from the application. This is provided in this file because
* program exit should shut down profiling (if GCRT0 is defined),
* and only this file is compiled with GCRT0 defined.
*/
.globl _exit
.ent _exit
_exit:
7:
move s0, a0 /* Save in case we loop. */
#ifdef GCRT0
jal _mcleanup
nop
#endif
la t0, hardware_exit_hook
beq t0,zero,1f
nop
jal t0
nop
1:
/* Call into the library to do the heavy lifting. */
jal __libcfe_exit
move a0, s0 /* Delay slot. */
b 7b /* Loop back just in case. */
nop
.end _exit
/* EOF crt0_cfe.S */