diff options
| author | Joel Sherrill <joel.sherrill@OARcorp.com> | 2008-08-15 20:21:00 +0000 |
|---|---|---|
| committer | Joel Sherrill <joel.sherrill@OARcorp.com> | 2008-08-15 20:21:00 +0000 |
| commit | 61f8fb0e3d35c1da13d6a429d68cc694517095de (patch) | |
| tree | 05b9f933d56e6e362a55aa9ac85722093eeb6450 /c/src/lib/libbsp/bfin/bf537Stamp/start/start.S | |
| parent | 2008-08-15 Joel Sherrill <joel.sherrill@OARcorp.com> (diff) | |
| download | rtems-61f8fb0e3d35c1da13d6a429d68cc694517095de.tar.bz2 | |
2008-08-15 Allan Hessenflow <allanh@kallisti.com>
* ChangeLog, Makefile.am, README, bsp_specs, configure.ac,
preinstall.am, console/console.c, include/bsp.h,
network/networkconfig.c, start/start.S, startup/bspstart.c,
startup/linkcmds: New files.
Diffstat (limited to 'c/src/lib/libbsp/bfin/bf537Stamp/start/start.S')
| -rw-r--r-- | c/src/lib/libbsp/bfin/bf537Stamp/start/start.S | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/bfin/bf537Stamp/start/start.S b/c/src/lib/libbsp/bfin/bf537Stamp/start/start.S new file mode 100644 index 0000000000..38f1a42a12 --- /dev/null +++ b/c/src/lib/libbsp/bfin/bf537Stamp/start/start.S @@ -0,0 +1,102 @@ +/* + * $Id$ + */ + +#include <libcpu/bf537.h> +#include <libcpu/sicRegs.h> +#include <libcpu/cecRegs.h> +#include <libcpu/coreTimerRegs.h> + +#ifndef LO +#define LO(con32) ((con32) & 0xFFFF) +#endif +#ifndef HI +#define HI(con32) (((con32) >> 16) & 0xFFFF) +#endif + + + .section .init + .globl __init + .type __init,@function +__init: + .section .fini + .globl __fini + .type __fini,@function +__fini: + + + .section .start + .align 4 + + .global __start +__start: + cli r0; + + /* setup an initial stack */ + sp.h = 0xFFB0; + sp.l = 0x0F00; + + /* disable timer interrupts */ + p0.h = HI(TCNTL); + p0.l = LO(TCNTL); + r0 = 0; + [p0] = r0; + + /* disable all interrupts routed through sic */ + p0.h = HI(SIC_IMASK); + p0.l = LO(SIC_IMASK); + [p0] = r0; + + /* this is so we can stay in supervisor mode and still be able to + accept interrupts later. */ + p0.h = start; + p0.l = start; + p1.h = HI(CEC_EVT15); + p1.l = LO(CEC_EVT15); + + [p1] = p0; + + r0 = 0x8000 (z); + sti r0; + + raise 15; + + p0.h = wait; + p0.l = wait; + + reti = p0; + rti; + + /* wait for event 15 */ +wait: + jump wait; + +start: + [--sp] = reti; /* allow us to process interrupts later */ + + /* mask interrupts for now */ + cli r0; + + p0.h = _bss_start; + p0.l = _bss_start; + p1.h = _end; + p1.l = _end; + r0 = p0; + r1 = p1; + r1 = r1 - r0; + p1 = r1; + r0 = 0; + + /* Set _bss_start until _end to zero */ + lsetup(loop1,loop2) lc0 = p1; +loop1: b[p0] = r0; +loop2: p0 +=1; + + p0.h = _boot_card; + p0.l = _boot_card; + call (p0); + + p0.h = _exit; + p0.l = _exit; + jump (p0); + |