Remove CS3-style initialization.

Remove libcs3-related bits from support/ld. Break them out into
libmaple proper and Wirish as appropriate: vector table definition and
ISR declarations go into libmaple proper, and startup code goes into
Wirish. Vector table symbols are included into common.inc from an
STM32 family-specific directory under support/ld/stm32.

This is a combination of 5 commits. Individual commit messages follow:

libcs3_stm32_src: Don't depend on cs3.h.

So we can use the existing toolchain.

Move ISR decls/vector table into libmaple proper.

This allows us to configure the vector table on a per-family basis.

- Move
        support/ld/libcs3_stm32_src/stm32_isrs.S
                                    stm32_vector_table.S
  to
        libmaple/stm32f1/isrs_performance.S
                         vector_table_performance.S,
  respectively.

  The directory libmaple/stm32f1/ is intended to hold all
  STM32F1-specific code within libmaple. Obviously, there's a lot of
  work to do before this becomes true.

- support/ld/libcs3_stm32_src/Makefile: Don't try to compile
  stm32_isrs.S and stm32_vector_table.S anymore.

- Add libmaple/stm32f1/rules.mk to include these new files in the
  standard libmaple build.

- support/make/target-config.mk: Add LIBMAPLE_MODULE_FAMILY, which
  selects a directory to use as a family-specific libmaple
  submodule.

- Makefile: Add LIBMAPLE_MODULE_FAMILY to LIBMAPLE_MODULES.

Remove support/ld/libcs3_stm32_src and derived object files.

From support/ld/libcs3_stm32_src, move start.S and start_c.c into
Wirish. Modify wirish/rules.mk accordingly.

Delete support/ld/libcs3_stm32_*_density.a. These are no longer
necessary, as the relevant objects are included in the standard Wirish
build. Remove the GROUP statements from the board linker scripts
accordingly.

Remove SEARCH_DIR(.) from common.inc; it's no longer necessary. Also
fix up some comments that are now out of date.

wirish/start_c.c: Don't use CS3-style memory initialization.

Switch memory initialization to a simpler style of initializing .data
if necessary, then zeroing .bss. Initializing .data is only necessary
during Flash builds, since during RAM builds, LOADADDR(.data) ==
ADDR(.data).

This makes libmaple completely incompatible with the CS3 startup
sequence. Subsequent commits will clean up the namespace to reflect
that fact.

Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>

1 files changed, 0 insertions, 58 deletions

diff --git a/support/ld/libcs3_stm32_src/start_c.c b/support/ld/libcs3_stm32_src/start_c.c
deleted file mode 100644
index 2ab0212..0000000
--- a/support/ld/libcs3_stm32_src/start_c.c
+++ /dev/null
@@ -1,58 +0,0 @@
-/* CS3 start_c routine.
- *
- * Copyright (c) 2006, 2007 CodeSourcery 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.
- */
-
-#include "cs3.h"
-
-extern void __libc_init_array (void);
-
-extern int main (int, char **, char **);
-
-extern void exit (int) __attribute__ ((noreturn, weak));
-
-void  __attribute ((noreturn))
-__cs3_start_c (void)
-{
-  unsigned regions = __cs3_region_num;
-  const struct __cs3_region *rptr = __cs3_regions;
-  int exit_code;
-
-  /* Initialize memory */
-  for (regions = __cs3_region_num, rptr = __cs3_regions; regions--; rptr++)
-    {
-      long long *src = (long long *)rptr->init;
-      long long *dst = (long long *)rptr->data;
-      unsigned limit = rptr->init_size;
-      unsigned count;
-
-      if (src != dst)
-	for (count = 0; count != limit; count += sizeof (long long))
-	  *dst++ = *src++;
-      else
-	dst = (long long *)((char *)dst + limit);
-      limit = rptr->zero_size;
-      for (count = 0; count != limit; count += sizeof (long long))
-	*dst++ = 0;
-    }
-
-  /* Run initializers.  */
-  __libc_init_array ();
-
-  exit_code = main (0, NULL, NULL);
-  if (exit)
-    exit (exit_code);
-  /* If exit is NULL, make sure we don't return. */
-  for (;;)
-    continue;
-}