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Diffstat (limited to 'board/purple/purple.c')
| -rw-r--r-- | board/purple/purple.c | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/board/purple/purple.c b/board/purple/purple.c new file mode 100644 index 000000000..293cc560e --- /dev/null +++ b/board/purple/purple.c @@ -0,0 +1,197 @@ +/* + * (C) Copyright 2003 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * 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 <command.h> +#include <asm/inca-ip.h> +#include <asm/regdef.h> +#include <asm/mipsregs.h> +#include <asm/addrspace.h> +#include <asm/cacheops.h> + +#include "sconsole.h" + +#define cache_unroll(base,op) \ + __asm__ __volatile__(" \ + .set noreorder; \ + .set mips3; \ + cache %1, (%0); \ + .set mips0; \ + .set reorder" \ + : \ + : "r" (base), \ + "i" (op)); + +typedef void (*FUNCPTR)(ulong *source, ulong *destination, ulong nlongs); + +extern void asc_serial_init (void); +extern void asc_serial_putc (char); +extern void asc_serial_puts (const char *); +extern int asc_serial_getc (void); +extern int asc_serial_tstc (void); +extern void asc_serial_setbrg (void); + + +long int initdram(int board_type) +{ + /* The only supported number of SDRAM banks is 4. + */ +#define CFG_NB 4 + + ulong cfgpb0 = *INCA_IP_SDRAM_MC_CFGPB0; + ulong cfgdw = *INCA_IP_SDRAM_MC_CFGDW; + int cols = cfgpb0 & 0xF; + int rows = (cfgpb0 & 0xF0) >> 4; + int dw = cfgdw & 0xF; + ulong size = (1 << (rows + cols)) * (1 << (dw - 1)) * CFG_NB; + + return size; +} + +int checkboard (void) +{ + + unsigned long chipid = *(unsigned long *)0xB800C800; + + printf ("Board: Purple PLB 2800 chip version %ld, ", chipid & 0xF); + + printf("CPU Speed %d MHz\n", CPU_CLOCK_RATE/1000000); + + return 0; +} + +int misc_init_r (void) +{ + asc_serial_init (); + + sconsole_putc = asc_serial_putc; + sconsole_puts = asc_serial_puts; + sconsole_getc = asc_serial_getc; + sconsole_tstc = asc_serial_tstc; + sconsole_setbrg = asc_serial_setbrg; + + sconsole_flush (); + return (0); +} + +/******************************************************************************* +* +* copydwords - copy one buffer to another a long at a time +* +* This routine copies the first <nlongs> longs from <source> to <destination>. +*/ +static void copydwords (ulong *source, ulong *destination, ulong nlongs) +{ + ulong temp,temp1; + ulong *dstend = destination + nlongs; + + while (destination < dstend) + { + temp = *source++; + /* dummy read from sdram */ + temp1 = *(ulong *)0xa0000000; + /* avoid optimization from compliler */ + *(ulong *)0xbf0081f8 = temp1 + temp; + *destination++ = temp; + + } +} + +/******************************************************************************* +* +* copyLongs - copy one buffer to another a long at a time +* +* This routine copies the first <nlongs> longs from <source> to <destination>. +*/ +static void copyLongs (ulong *source, ulong *destination, ulong nlongs) +{ + FUNCPTR absEntry; + + absEntry = (FUNCPTR)(0xbf008000+((ulong)copydwords & 0x7)); + absEntry(source, destination, nlongs); +} + +/******************************************************************************* +* +* programLoad - load program into ram +* +* This routine load copydwords into ram +* +*/ +static void programLoad(void) +{ + FUNCPTR absEntry; + ulong *src,*dst; + + src = (ulong *)(TEXT_BASE + 0x428); + dst = (ulong *)0xbf0081d0; + + absEntry = (FUNCPTR)(TEXT_BASE + 0x400); + absEntry(src,dst,0x6); + + src = (ulong *)((ulong)copydwords & 0xfffffff8); + dst = (ulong *)0xbf008000; + + absEntry(src,dst,0x38); +} + +/******************************************************************************* +* +* copy_code - copy u-boot image from flash to RAM +* +* This routine is needed to solve flash problems on this board +* +*/ +void copy_code (ulong dest_addr) +{ + unsigned long start; + unsigned long end; + + /* load copydwords into ram + */ + programLoad(); + + /* copy u-boot code + */ + copyLongs((ulong *)CFG_MONITOR_BASE, + (ulong *)dest_addr, + (CFG_MONITOR_LEN + 3) / 4); + + + /* flush caches + */ + + start = KSEG0; + end = start + CFG_DCACHE_SIZE; + while(start < end) { + cache_unroll(start,Index_Writeback_Inv_D); + start += CFG_CACHELINE_SIZE; + } + + start = KSEG0; + end = start + CFG_ICACHE_SIZE; + while(start < end) { + cache_unroll(start,Index_Invalidate_I); + start += CFG_CACHELINE_SIZE; + } +} |