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

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* 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

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. */