diff options
Diffstat (limited to 'arch/nios/cpu/cpu.c')
| -rw-r--r-- | arch/nios/cpu/cpu.c | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/arch/nios/cpu/cpu.c b/arch/nios/cpu/cpu.c new file mode 100644 index 000000000..5519e8278 --- /dev/null +++ b/arch/nios/cpu/cpu.c @@ -0,0 +1,78 @@ +/* + * (C) Copyright 2003, Psyent Corporation <www.psyent.com> + * Scott McNutt <smcnutt@psyent.com> + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <common.h> +#include <nios.h> + + +int checkcpu (void) +{ + unsigned val; + unsigned rev_major; + unsigned rev_minor; + short nregs, hi_limit, lo_limit; + + /* Get cpu version info */ + val = rdctl (CTL_CPU_ID); + puts ("CPU: "); + printf ("%s", (val & 0x00008000) ? "Nios-16 " : "Nios-32 "); + rev_major = (val>>12) & 0x07; + rev_minor = (val>>4) & 0x0ff; + printf ("Rev. %d.%d (0x%04x)", rev_major, rev_minor, + val & 0xffff); + if (rev_major == 0x08) + printf (" [OpenCore (R) Plus]"); + printf ("\n"); + + /* Check register file */ + val = rdctl (CTL_WVALID); + lo_limit = val & 0x01f; + hi_limit = (val>>5) & 0x1f; + nregs = (hi_limit + 2) * 16; + printf ("Reg file size: %d LO_LIMIT/HI_LIMIT: %d/%d\n", + nregs, lo_limit, hi_limit); + + return (0); +} + + +int do_reset (void) +{ + /* trap 0 does the trick ... at least with the OCI debug + * present -- haven't tested without it yet (stm). + */ + disable_interrupts (); + ipri (1); + asm volatile ("trap 0\n"); + + /* No return ;-) */ + + return(0); +} + + +#if defined(CONFIG_WATCHDOG) +void watchdog_reset (void) +{ +} +#endif /* CONFIG_WATCHDOG */ |