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 <ppc4xx_enet.h>
27 #include <asm/processor.h>
30 #if defined(CONFIG_405GP) || defined(CONFIG_405EP)
31 DECLARE_GLOBAL_DATA_PTR;
35 #define mtebc(reg, data) mtdcr(ebccfga,reg);mtdcr(ebccfgd,data)
37 #ifdef CFG_INIT_DCACHE_CS
38 # if (CFG_INIT_DCACHE_CS == 0)
41 # if (defined(CFG_EBC_PB0AP) && defined(CFG_EBC_PB0CR))
42 # define PBxAP_VAL CFG_EBC_PB0AP
43 # define PBxCR_VAL CFG_EBC_PB0CR
46 # if (CFG_INIT_DCACHE_CS == 1)
49 # if (defined(CFG_EBC_PB1AP) && defined(CFG_EBC_PB1CR))
50 # define PBxAP_VAL CFG_EBC_PB1AP
51 # define PBxCR_VAL CFG_EBC_PB1CR
54 # if (CFG_INIT_DCACHE_CS == 2)
57 # if (defined(CFG_EBC_PB2AP) && defined(CFG_EBC_PB2CR))
58 # define PBxAP_VAL CFG_EBC_PB2AP
59 # define PBxCR_VAL CFG_EBC_PB2CR
62 # if (CFG_INIT_DCACHE_CS == 3)
65 # if (defined(CFG_EBC_PB3AP) && defined(CFG_EBC_PB3CR))
66 # define PBxAP_VAL CFG_EBC_PB3AP
67 # define PBxCR_VAL CFG_EBC_PB3CR
70 # if (CFG_INIT_DCACHE_CS == 4)
73 # if (defined(CFG_EBC_PB4AP) && defined(CFG_EBC_PB4CR))
74 # define PBxAP_VAL CFG_EBC_PB4AP
75 # define PBxCR_VAL CFG_EBC_PB4CR
78 # if (CFG_INIT_DCACHE_CS == 5)
81 # if (defined(CFG_EBC_PB5AP) && defined(CFG_EBC_PB5CR))
82 # define PBxAP_VAL CFG_EBC_PB5AP
83 # define PBxCR_VAL CFG_EBC_PB5CR
86 # if (CFG_INIT_DCACHE_CS == 6)
89 # if (defined(CFG_EBC_PB6AP) && defined(CFG_EBC_PB6CR))
90 # define PBxAP_VAL CFG_EBC_PB6AP
91 # define PBxCR_VAL CFG_EBC_PB6CR
94 # if (CFG_INIT_DCACHE_CS == 7)
97 # if (defined(CFG_EBC_PB7AP) && defined(CFG_EBC_PB7CR))
98 # define PBxAP_VAL CFG_EBC_PB7AP
99 # define PBxCR_VAL CFG_EBC_PB7CR
102 #endif /* CFG_INIT_DCACHE_CS */
106 * Breath some life into the CPU...
108 * Set up the memory map,
109 * initialize a bunch of registers
114 #if defined(CONFIG_405EP)
116 * GPIO0 setup (select GPIO or alternate function)
118 out32(GPIO0_OSRH, CFG_GPIO0_OSRH); /* output select */
119 out32(GPIO0_OSRL, CFG_GPIO0_OSRL);
120 out32(GPIO0_ISR1H, CFG_GPIO0_ISR1H); /* input select */
121 out32(GPIO0_ISR1L, CFG_GPIO0_ISR1L);
122 out32(GPIO0_TSRH, CFG_GPIO0_TSRH); /* three-state select */
123 out32(GPIO0_TSRL, CFG_GPIO0_TSRL);
124 out32(GPIO0_TCR, CFG_GPIO0_TCR); /* enable output driver for outputs */
127 * Set EMAC noise filter bits
129 mtdcr(cpc0_epctl, CPC0_EPRCSR_E0NFE | CPC0_EPRCSR_E1NFE);
130 #endif /* CONFIG_405EP */
133 * External Bus Controller (EBC) Setup
135 #if (defined(CFG_EBC_PB0AP) && defined(CFG_EBC_PB0CR))
137 * Move the next instructions into icache, since these modify the flash
138 * we are running from!
140 asm volatile(" bl 0f" ::: "lr");
141 asm volatile("0: mflr 3" ::: "r3");
142 asm volatile(" addi 4, 0, 14" ::: "r4");
143 asm volatile(" mtctr 4" ::: "ctr");
144 asm volatile("1: icbt 0, 3");
145 asm volatile(" addi 3, 3, 32" ::: "r3");
146 asm volatile(" bdnz 1b" ::: "ctr", "cr0");
147 asm volatile(" addis 3, 0, 0x0" ::: "r3");
148 asm volatile(" ori 3, 3, 0xA000" ::: "r3");
149 asm volatile(" mtctr 3" ::: "ctr");
150 asm volatile("2: bdnz 2b" ::: "ctr", "cr0");
152 mtebc(pb0ap, CFG_EBC_PB0AP);
153 mtebc(pb0cr, CFG_EBC_PB0CR);
156 #if (defined(CFG_EBC_PB1AP) && defined(CFG_EBC_PB1CR) && !(CFG_INIT_DCACHE_CS == 1))
157 mtebc(pb1ap, CFG_EBC_PB1AP);
158 mtebc(pb1cr, CFG_EBC_PB1CR);
161 #if (defined(CFG_EBC_PB2AP) && defined(CFG_EBC_PB2CR) && !(CFG_INIT_DCACHE_CS == 2))
162 mtebc(pb2ap, CFG_EBC_PB2AP);
163 mtebc(pb2cr, CFG_EBC_PB2CR);
166 #if (defined(CFG_EBC_PB3AP) && defined(CFG_EBC_PB3CR) && !(CFG_INIT_DCACHE_CS == 3))
167 mtebc(pb3ap, CFG_EBC_PB3AP);
168 mtebc(pb3cr, CFG_EBC_PB3CR);
171 #if (defined(CFG_EBC_PB4AP) && defined(CFG_EBC_PB4CR) && !(CFG_INIT_DCACHE_CS == 4))
172 mtebc(pb4ap, CFG_EBC_PB4AP);
173 mtebc(pb4cr, CFG_EBC_PB4CR);
176 #if (defined(CFG_EBC_PB5AP) && defined(CFG_EBC_PB5CR) && !(CFG_INIT_DCACHE_CS == 5))
177 mtebc(pb5ap, CFG_EBC_PB5AP);
178 mtebc(pb5cr, CFG_EBC_PB5CR);
181 #if (defined(CFG_EBC_PB6AP) && defined(CFG_EBC_PB6CR) && !(CFG_INIT_DCACHE_CS == 6))
182 mtebc(pb6ap, CFG_EBC_PB6AP);
183 mtebc(pb6cr, CFG_EBC_PB6CR);
186 #if (defined(CFG_EBC_PB7AP) && defined(CFG_EBC_PB7CR) && !(CFG_INIT_DCACHE_CS == 7))
187 mtebc(pb7ap, CFG_EBC_PB7AP);
188 mtebc(pb7cr, CFG_EBC_PB7CR);
191 #if defined(CONFIG_WATCHDOG)
195 #if defined(CONFIG_440EP) || defined(CONFIG_440GR)
196 val |= 0xb8000000; /* generate system reset after 1.34 seconds */
198 val |= 0xf0000000; /* generate system reset after 2.684 seconds */
203 val |= 0x80000000; /* enable watchdog timer */
206 reset_4xx_watchdog();
207 #endif /* CONFIG_WATCHDOG */
211 * initialize higher level parts of CPU like time base and timers
213 int cpu_init_r (void)
215 #if defined(CONFIG_405GP) || defined(CONFIG_405EP)
218 #if defined(CONFIG_405GP)
219 uint pvr = get_pvr();
222 #ifdef CFG_INIT_DCACHE_CS
224 * Flush and invalidate dcache, then disable CS for temporary stack.
225 * Afterwards, this CS can be used for other purposes
227 dcache_disable(); /* flush and invalidate dcache */
229 mtebc(PBxCR, 0); /* disable CS for temporary stack */
231 #if (defined(PBxAP_VAL) && defined(PBxCR_VAL))
233 * Write new value into CS register
235 mtebc(PBxAP, PBxAP_VAL);
236 mtebc(PBxCR, PBxCR_VAL);
238 #endif /* CFG_INIT_DCACHE_CS */
241 * Write Ethernetaddress into on-chip register
244 reg |= bd->bi_enetaddr[0]; /* set high address */
246 reg |= bd->bi_enetaddr[1];
247 out32 (EMAC_IAH, reg);
250 reg |= bd->bi_enetaddr[2]; /* set low address */
252 reg |= bd->bi_enetaddr[3];
254 reg |= bd->bi_enetaddr[4];
256 reg |= bd->bi_enetaddr[5];
257 out32 (EMAC_IAL, reg);
259 #if defined(CONFIG_405GP)
261 * Set edge conditioning circuitry on PPC405GPr
262 * for compatibility to existing PPC405GP designs.
264 if ((pvr & 0xfffffff0) == (PVR_405GPR_RB & 0xfffffff0)) {
265 mtdcr(ecr, 0x60606000);
267 #endif /* defined(CONFIG_405GP) */
268 #endif /* defined(CONFIG_405GP) || defined(CONFIG_405EP) */