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>
35 #define cache_unroll(base,op) \
36 __asm__ __volatile__(" \
46 typedef void (*FUNCPTR)(ulong *source, ulong *destination, ulong nlongs);
48 extern void asc_serial_init (void);
49 extern void asc_serial_putc (char);
50 extern void asc_serial_puts (const char *);
51 extern int asc_serial_getc (void);
52 extern int asc_serial_tstc (void);
53 extern void asc_serial_setbrg (void);
55 static void sdram_timing_init (ulong size)
60 register uint p0, p1, p2, p3, p4;
63 #define WRITE_MC_IOGP_1 *(uint *)0xbf800800 = (p1<<14)+(p2<<13)+(p4<<8)+(p0<<4)+p3;
64 #define WRITE_MC_IOGP_2 *(uint *)0xbf800800 = (p1<<14)+(p2<<13)+((p4-16)<<8)+(p0<<4)+p3;
68 while (p0 < 4 && done == 0) {
70 while (p1 < 2 && done == 0) {
72 while (p2 < 2 && done == 0) {
74 while (p3 < 16 && done == 0) {
77 while (p4 < 32 && done == 0) {
80 for (addr = KSEG1 + 0x4000;
81 addr < KSEG1ADDR (size);
83 *(uint *) addr = 0xaa55aa55;
88 for (addr = KSEG1 + 0x4000;
89 addr < KSEG1ADDR (size) && pass == 1;
91 if (*(uint *) addr != 0xaa55aa55)
119 long int initdram(int board_type)
121 /* The only supported number of SDRAM banks is 4.
125 ulong cfgpb0 = *INCA_IP_SDRAM_MC_CFGPB0;
126 ulong cfgdw = *INCA_IP_SDRAM_MC_CFGDW;
127 int cols = cfgpb0 & 0xF;
128 int rows = (cfgpb0 & 0xF0) >> 4;
129 int dw = cfgdw & 0xF;
130 ulong size = (1 << (rows + cols)) * (1 << (dw - 1)) * CFG_NB;
131 void (* sdram_init) (ulong);
133 sdram_init = (void (*)(ulong)) KSEG0ADDR(&sdram_timing_init);
140 int checkboard (void)
143 unsigned long chipid = *(unsigned long *)0xB800C800;
145 printf ("Board: Purple PLB 2800 chip version %ld, ", chipid & 0xF);
147 printf("CPU Speed %d MHz\n", CPU_CLOCK_RATE/1000000);
154 int misc_init_r (void)
158 sconsole_putc = asc_serial_putc;
159 sconsole_puts = asc_serial_puts;
160 sconsole_getc = asc_serial_getc;
161 sconsole_tstc = asc_serial_tstc;
162 sconsole_setbrg = asc_serial_setbrg;
168 /*******************************************************************************
170 * copydwords - copy one buffer to another a long at a time
172 * This routine copies the first <nlongs> longs from <source> to <destination>.
174 static void copydwords (ulong *source, ulong *destination, ulong nlongs)
177 ulong *dstend = destination + nlongs;
179 while (destination < dstend)
182 /* dummy read from sdram */
183 temp1 = *(ulong *)0xa0000000;
184 /* avoid optimization from compliler */
185 *(ulong *)0xbf0081f8 = temp1 + temp;
186 *destination++ = temp;
191 /*******************************************************************************
193 * copyLongs - copy one buffer to another a long at a time
195 * This routine copies the first <nlongs> longs from <source> to <destination>.
197 static void copyLongs (ulong *source, ulong *destination, ulong nlongs)
201 absEntry = (FUNCPTR)(0xbf008000+((ulong)copydwords & 0x7));
202 absEntry(source, destination, nlongs);
205 /*******************************************************************************
207 * programLoad - load program into ram
209 * This routine load copydwords into ram
212 static void programLoad(void)
217 src = (ulong *)(TEXT_BASE + 0x428);
218 dst = (ulong *)0xbf0081d0;
220 absEntry = (FUNCPTR)(TEXT_BASE + 0x400);
221 absEntry(src,dst,0x6);
223 src = (ulong *)((ulong)copydwords & 0xfffffff8);
224 dst = (ulong *)0xbf008000;
226 absEntry(src,dst,0x38);
229 /*******************************************************************************
231 * copy_code - copy u-boot image from flash to RAM
233 * This routine is needed to solve flash problems on this board
236 void copy_code (ulong dest_addr)
238 extern long uboot_end_data;
242 /* load copydwords into ram
248 copyLongs((ulong *)CFG_MONITOR_BASE,
250 ((ulong)&uboot_end_data - CFG_MONITOR_BASE + 3) / 4);
257 end = start + CFG_DCACHE_SIZE;
259 cache_unroll(start,Index_Writeback_Inv_D);
260 start += CFG_CACHELINE_SIZE;
264 end = start + CFG_ICACHE_SIZE;
266 cache_unroll(start,Index_Invalidate_I);
267 start += CFG_CACHELINE_SIZE;