3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
27 #include <asm/inca-ip.h>
28 #include <asm/regdef.h>
29 #include <asm/mipsregs.h>
31 #include <asm/addrspace.h>
32 #include <asm/cacheops.h>
33 #include <asm/reboot.h>
37 #define cache_unroll(base,op) \
38 __asm__ __volatile__(" \
48 typedef void (*FUNCPTR)(ulong *source, ulong *destination, ulong nlongs);
50 extern void asc_serial_init (void);
51 extern void asc_serial_putc (char);
52 extern void asc_serial_puts (const char *);
53 extern int asc_serial_getc (void);
54 extern int asc_serial_tstc (void);
55 extern void asc_serial_setbrg (void);
57 void _machine_restart(void)
59 void (*f)(void) = (void *) 0xbfc00000;
64 static void sdram_timing_init (ulong size)
69 register uint p0, p1, p2, p3, p4;
72 #define WRITE_MC_IOGP_1 *(uint *)0xbf800800 = (p1<<14)+(p2<<13)+(p4<<8)+(p0<<4)+p3;
73 #define WRITE_MC_IOGP_2 *(uint *)0xbf800800 = (p1<<14)+(p2<<13)+((p4-16)<<8)+(p0<<4)+p3;
77 while (p0 < 4 && done == 0) {
79 while (p1 < 2 && done == 0) {
81 while (p2 < 2 && done == 0) {
83 while (p3 < 16 && done == 0) {
86 while (p4 < 32 && done == 0) {
89 for (addr = CKSEG1 + 0x4000;
90 addr < CKSEG1ADDR (size);
92 *(uint *) addr = 0xaa55aa55;
97 for (addr = CKSEG1 + 0x4000;
98 addr < CKSEG1ADDR (size) && pass == 1;
100 if (*(uint *) addr != 0xaa55aa55)
128 phys_size_t initdram(int board_type)
130 /* The only supported number of SDRAM banks is 4.
134 ulong cfgpb0 = *INCA_IP_SDRAM_MC_CFGPB0;
135 ulong cfgdw = *INCA_IP_SDRAM_MC_CFGDW;
136 int cols = cfgpb0 & 0xF;
137 int rows = (cfgpb0 & 0xF0) >> 4;
138 int dw = cfgdw & 0xF;
139 ulong size = (1 << (rows + cols)) * (1 << (dw - 1)) * CFG_NB;
140 void (* sdram_init) (ulong);
142 sdram_init = (void (*)(ulong)) CKSEG0ADDR(&sdram_timing_init);
149 int checkboard (void)
152 unsigned long chipid = *(unsigned long *)0xB800C800;
154 printf ("Board: Purple PLB 2800 chip version %ld, ", chipid & 0xF);
156 printf("CPU Speed %d MHz\n", CPU_CLOCK_RATE/1000000);
163 int misc_init_r (void)
167 sconsole_putc = asc_serial_putc;
168 sconsole_puts = asc_serial_puts;
169 sconsole_getc = asc_serial_getc;
170 sconsole_tstc = asc_serial_tstc;
171 sconsole_setbrg = asc_serial_setbrg;
177 /*******************************************************************************
179 * copydwords - copy one buffer to another a long at a time
181 * This routine copies the first <nlongs> longs from <source> to <destination>.
183 static void copydwords (ulong *source, ulong *destination, ulong nlongs)
186 ulong *dstend = destination + nlongs;
188 while (destination < dstend) {
190 /* dummy read from sdram */
191 temp1 = *(ulong *)0xa0000000;
192 /* avoid optimization from compliler */
193 *(ulong *)0xbf0081f8 = temp1 + temp;
194 *destination++ = temp;
199 /*******************************************************************************
201 * copyLongs - copy one buffer to another a long at a time
203 * This routine copies the first <nlongs> longs from <source> to <destination>.
205 static void copyLongs (ulong *source, ulong *destination, ulong nlongs)
209 absEntry = (FUNCPTR)(0xbf008000+((ulong)copydwords & 0x7));
210 absEntry(source, destination, nlongs);
213 /*******************************************************************************
215 * programLoad - load program into ram
217 * This routine load copydwords into ram
220 static void programLoad(void)
225 src = (ulong *)(TEXT_BASE + 0x428);
226 dst = (ulong *)0xbf0081d0;
228 absEntry = (FUNCPTR)(TEXT_BASE + 0x400);
229 absEntry(src,dst,0x6);
231 src = (ulong *)((ulong)copydwords & 0xfffffff8);
232 dst = (ulong *)0xbf008000;
234 absEntry(src,dst,0x38);
237 /*******************************************************************************
239 * copy_code - copy u-boot image from flash to RAM
241 * This routine is needed to solve flash problems on this board
244 void copy_code (ulong dest_addr)
246 extern long uboot_end_data;
250 /* load copydwords into ram
256 copyLongs((ulong *)CFG_MONITOR_BASE,
258 ((ulong)&uboot_end_data - CFG_MONITOR_BASE + 3) / 4);
265 end = start + CFG_DCACHE_SIZE;
267 cache_unroll(start,Index_Writeback_Inv_D);
268 start += CFG_CACHELINE_SIZE;
272 end = start + CFG_ICACHE_SIZE;
274 cache_unroll(start,Index_Invalidate_I);
275 start += CFG_CACHELINE_SIZE;
279 #ifdef CONFIG_PLB2800_ETHER
280 int board_eth_init(bd_t *bis)
282 return plb2800_eth_initialize(bis);