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,
26 #include <asm/inca-ip.h>
27 #include <asm/regdef.h>
28 #include <asm/mipsregs.h>
30 #include <asm/addrspace.h>
31 #include <asm/cacheops.h>
32 #include <asm/reboot.h>
36 #define cache_unroll(base,op) \
37 __asm__ __volatile__(" \
47 typedef void (*FUNCPTR)(ulong *source, ulong *destination, ulong nlongs);
49 extern void asc_serial_init (void);
50 extern void asc_serial_putc (char);
51 extern void asc_serial_puts (const char *);
52 extern int asc_serial_getc (void);
53 extern int asc_serial_tstc (void);
54 extern void asc_serial_setbrg (void);
56 void _machine_restart(void)
58 void (*f)(void) = (void *) 0xbfc00000;
63 static void sdram_timing_init (ulong size)
68 register uint p0, p1, p2, p3, p4;
71 #define WRITE_MC_IOGP_1 *(uint *)0xbf800800 = (p1<<14)+(p2<<13)+(p4<<8)+(p0<<4)+p3;
72 #define WRITE_MC_IOGP_2 *(uint *)0xbf800800 = (p1<<14)+(p2<<13)+((p4-16)<<8)+(p0<<4)+p3;
76 while (p0 < 4 && done == 0) {
78 while (p1 < 2 && done == 0) {
80 while (p2 < 2 && done == 0) {
82 while (p3 < 16 && done == 0) {
85 while (p4 < 32 && done == 0) {
88 for (addr = CKSEG1 + 0x4000;
89 addr < CKSEG1ADDR (size);
91 *(uint *) addr = 0xaa55aa55;
96 for (addr = CKSEG1 + 0x4000;
97 addr < CKSEG1ADDR (size) && pass == 1;
99 if (*(uint *) addr != 0xaa55aa55)
127 long int initdram(int board_type)
129 /* The only supported number of SDRAM banks is 4.
133 ulong cfgpb0 = *INCA_IP_SDRAM_MC_CFGPB0;
134 ulong cfgdw = *INCA_IP_SDRAM_MC_CFGDW;
135 int cols = cfgpb0 & 0xF;
136 int rows = (cfgpb0 & 0xF0) >> 4;
137 int dw = cfgdw & 0xF;
138 ulong size = (1 << (rows + cols)) * (1 << (dw - 1)) * CFG_NB;
139 void (* sdram_init) (ulong);
141 sdram_init = (void (*)(ulong)) CKSEG0ADDR(&sdram_timing_init);
148 int checkboard (void)
151 unsigned long chipid = *(unsigned long *)0xB800C800;
153 printf ("Board: Purple PLB 2800 chip version %ld, ", chipid & 0xF);
155 printf("CPU Speed %d MHz\n", CPU_CLOCK_RATE/1000000);
162 int misc_init_r (void)
166 sconsole_putc = asc_serial_putc;
167 sconsole_puts = asc_serial_puts;
168 sconsole_getc = asc_serial_getc;
169 sconsole_tstc = asc_serial_tstc;
170 sconsole_setbrg = asc_serial_setbrg;
176 /*******************************************************************************
178 * copydwords - copy one buffer to another a long at a time
180 * This routine copies the first <nlongs> longs from <source> to <destination>.
182 static void copydwords (ulong *source, ulong *destination, ulong nlongs)
185 ulong *dstend = destination + nlongs;
187 while (destination < dstend) {
189 /* dummy read from sdram */
190 temp1 = *(ulong *)0xa0000000;
191 /* avoid optimization from compliler */
192 *(ulong *)0xbf0081f8 = temp1 + temp;
193 *destination++ = temp;
198 /*******************************************************************************
200 * copyLongs - copy one buffer to another a long at a time
202 * This routine copies the first <nlongs> longs from <source> to <destination>.
204 static void copyLongs (ulong *source, ulong *destination, ulong nlongs)
208 absEntry = (FUNCPTR)(0xbf008000+((ulong)copydwords & 0x7));
209 absEntry(source, destination, nlongs);
212 /*******************************************************************************
214 * programLoad - load program into ram
216 * This routine load copydwords into ram
219 static void programLoad(void)
224 src = (ulong *)(TEXT_BASE + 0x428);
225 dst = (ulong *)0xbf0081d0;
227 absEntry = (FUNCPTR)(TEXT_BASE + 0x400);
228 absEntry(src,dst,0x6);
230 src = (ulong *)((ulong)copydwords & 0xfffffff8);
231 dst = (ulong *)0xbf008000;
233 absEntry(src,dst,0x38);
236 /*******************************************************************************
238 * copy_code - copy u-boot image from flash to RAM
240 * This routine is needed to solve flash problems on this board
243 void copy_code (ulong dest_addr)
245 extern long uboot_end_data;
249 /* load copydwords into ram
255 copyLongs((ulong *)CFG_MONITOR_BASE,
257 ((ulong)&uboot_end_data - CFG_MONITOR_BASE + 3) / 4);
264 end = start + CFG_DCACHE_SIZE;
266 cache_unroll(start,Index_Writeback_Inv_D);
267 start += CFG_CACHELINE_SIZE;
271 end = start + CFG_ICACHE_SIZE;
273 cache_unroll(start,Index_Invalidate_I);
274 start += CFG_CACHELINE_SIZE;