diff options
author | Joel Sherrill <joel.sherrill@OARcorp.com> | 2009-11-23 20:09:58 +0000 |
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committer | Joel Sherrill <joel.sherrill@OARcorp.com> | 2009-11-23 20:09:58 +0000 |
commit | c23e29effa1e89467a26075125193452753929cb (patch) | |
tree | 29230abe008a8260c12f1277fd97a586fc4ff3c7 /c/src/lib/libbsp/sparc/leon2/startup/bspstart.c | |
parent | 2009-11-23 Joel Sherrill <joel.sherrill@OARcorp.com> (diff) | |
download | rtems-c23e29effa1e89467a26075125193452753929cb.tar.bz2 |
2009-11-23 Joel Sherrill <joel.sherrill@OARcorp.com>
* Makefile.am: sparc/shared/bspstart.c was really leon2 specific. So
move it here.
* startup/bspstart.c: New file.
Diffstat (limited to 'c/src/lib/libbsp/sparc/leon2/startup/bspstart.c')
-rw-r--r-- | c/src/lib/libbsp/sparc/leon2/startup/bspstart.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/sparc/leon2/startup/bspstart.c b/c/src/lib/libbsp/sparc/leon2/startup/bspstart.c new file mode 100644 index 0000000000..899c4dd8aa --- /dev/null +++ b/c/src/lib/libbsp/sparc/leon2/startup/bspstart.c @@ -0,0 +1,46 @@ +/* + * LEON2 Cache Snooping Support + * + * + * COPYRIGHT (c) 1989-2009. + * On-Line Applications Research Corporation (OAR). + * + * The license and distribution terms for this file may be + * found in the file LICENSE in this distribution or at + * http://www.rtems.com/license/LICENSE. + * + * Ported to ERC32 implementation of the SPARC by On-Line Applications + * Research Corporation (OAR) under contract to the European Space + * Agency (ESA). + * + * ERC32 modifications of respective RTEMS file: COPYRIGHT (c) 1995. + * European Space Agency. + * + * $Id$ + */ + +#include <bsp.h> +#include <bsp/bootcard.h> + +/* + * Tells us if data cache snooping is available + */ +int CPU_SPARC_HAS_SNOOPING; + +/* + * set_snooping + * + * Read the data cache configuration register to determine if + * bus snooping is available. This is needed for some drivers so + * that they can select the most efficient copy routines. + */ +static inline int set_snooping(void) +{ + unsigned int tmp = *(unsigned int *)0x80000014; /* Cache control register */ + return ((tmp>>23) & 1); /* Data cache snooping enabled */ +} + +void bsp_start( void ) +{ + CPU_SPARC_HAS_SNOOPING = set_snooping(); +} |