xref: /openbmc/u-boot/arch/powerpc/cpu/mpc85xx/cpu_init.c (revision a47a12becf66f02a56da91c161e2edb625e9f20c)
1 /*
2  * Copyright 2007-2009 Freescale Semiconductor, Inc.
3  *
4  * (C) Copyright 2003 Motorola Inc.
5  * Modified by Xianghua Xiao, X.Xiao@motorola.com
6  *
7  * (C) Copyright 2000
8  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
9  *
10  * See file CREDITS for list of people who contributed to this
11  * project.
12  *
13  * This program is free software; you can redistribute it and/or
14  * modify it under the terms of the GNU General Public License as
15  * published by the Free Software Foundation; either version 2 of
16  * the License, or (at your option) any later version.
17  *
18  * This program is distributed in the hope that it will be useful,
19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
21  * GNU General Public License for more details.
22  *
23  * You should have received a copy of the GNU General Public License
24  * along with this program; if not, write to the Free Software
25  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
26  * MA 02111-1307 USA
27  */
28 
29 #include <common.h>
30 #include <watchdog.h>
31 #include <asm/processor.h>
32 #include <ioports.h>
33 #include <asm/io.h>
34 #include <asm/mmu.h>
35 #include <asm/fsl_law.h>
36 #include "mp.h"
37 
38 DECLARE_GLOBAL_DATA_PTR;
39 
40 #ifdef CONFIG_MPC8536
41 extern void fsl_serdes_init(void);
42 #endif
43 
44 #ifdef CONFIG_QE
45 extern qe_iop_conf_t qe_iop_conf_tab[];
46 extern void qe_config_iopin(u8 port, u8 pin, int dir,
47 				int open_drain, int assign);
48 extern void qe_init(uint qe_base);
49 extern void qe_reset(void);
50 
51 static void config_qe_ioports(void)
52 {
53 	u8      port, pin;
54 	int     dir, open_drain, assign;
55 	int     i;
56 
57 	for (i = 0; qe_iop_conf_tab[i].assign != QE_IOP_TAB_END; i++) {
58 		port		= qe_iop_conf_tab[i].port;
59 		pin		= qe_iop_conf_tab[i].pin;
60 		dir		= qe_iop_conf_tab[i].dir;
61 		open_drain	= qe_iop_conf_tab[i].open_drain;
62 		assign		= qe_iop_conf_tab[i].assign;
63 		qe_config_iopin(port, pin, dir, open_drain, assign);
64 	}
65 }
66 #endif
67 
68 #ifdef CONFIG_CPM2
69 void config_8560_ioports (volatile ccsr_cpm_t * cpm)
70 {
71 	int portnum;
72 
73 	for (portnum = 0; portnum < 4; portnum++) {
74 		uint pmsk = 0,
75 		     ppar = 0,
76 		     psor = 0,
77 		     pdir = 0,
78 		     podr = 0,
79 		     pdat = 0;
80 		iop_conf_t *iopc = (iop_conf_t *) & iop_conf_tab[portnum][0];
81 		iop_conf_t *eiopc = iopc + 32;
82 		uint msk = 1;
83 
84 		/*
85 		 * NOTE:
86 		 * index 0 refers to pin 31,
87 		 * index 31 refers to pin 0
88 		 */
89 		while (iopc < eiopc) {
90 			if (iopc->conf) {
91 				pmsk |= msk;
92 				if (iopc->ppar)
93 					ppar |= msk;
94 				if (iopc->psor)
95 					psor |= msk;
96 				if (iopc->pdir)
97 					pdir |= msk;
98 				if (iopc->podr)
99 					podr |= msk;
100 				if (iopc->pdat)
101 					pdat |= msk;
102 			}
103 
104 			msk <<= 1;
105 			iopc++;
106 		}
107 
108 		if (pmsk != 0) {
109 			volatile ioport_t *iop = ioport_addr (cpm, portnum);
110 			uint tpmsk = ~pmsk;
111 
112 			/*
113 			 * the (somewhat confused) paragraph at the
114 			 * bottom of page 35-5 warns that there might
115 			 * be "unknown behaviour" when programming
116 			 * PSORx and PDIRx, if PPARx = 1, so I
117 			 * decided this meant I had to disable the
118 			 * dedicated function first, and enable it
119 			 * last.
120 			 */
121 			iop->ppar &= tpmsk;
122 			iop->psor = (iop->psor & tpmsk) | psor;
123 			iop->podr = (iop->podr & tpmsk) | podr;
124 			iop->pdat = (iop->pdat & tpmsk) | pdat;
125 			iop->pdir = (iop->pdir & tpmsk) | pdir;
126 			iop->ppar |= ppar;
127 		}
128 	}
129 }
130 #endif
131 
132 /*
133  * Breathe some life into the CPU...
134  *
135  * Set up the memory map
136  * initialize a bunch of registers
137  */
138 
139 #ifdef CONFIG_FSL_CORENET
140 static void corenet_tb_init(void)
141 {
142 	volatile ccsr_rcpm_t *rcpm =
143 		(void *)(CONFIG_SYS_FSL_CORENET_RCPM_ADDR);
144 	volatile ccsr_pic_t *pic =
145 		(void *)(CONFIG_SYS_MPC85xx_PIC_ADDR);
146 	u32 whoami = in_be32(&pic->whoami);
147 
148 	/* Enable the timebase register for this core */
149 	out_be32(&rcpm->ctbenrl, (1 << whoami));
150 }
151 #endif
152 
153 void cpu_init_f (void)
154 {
155 	volatile ccsr_lbc_t *memctl = (void *)(CONFIG_SYS_MPC85xx_LBC_ADDR);
156 	extern void m8560_cpm_reset (void);
157 #ifdef CONFIG_MPC8548
158 	ccsr_local_ecm_t *ecm = (void *)(CONFIG_SYS_MPC85xx_ECM_ADDR);
159 	uint svr = get_svr();
160 
161 	/*
162 	 * CPU2 errata workaround: A core hang possible while executing
163 	 * a msync instruction and a snoopable transaction from an I/O
164 	 * master tagged to make quick forward progress is present.
165 	 * Fixed in silicon rev 2.1.
166 	 */
167 	if ((SVR_MAJ(svr) == 1) || ((SVR_MAJ(svr) == 2 && SVR_MIN(svr) == 0x0)))
168 		out_be32(&ecm->eebpcr, in_be32(&ecm->eebpcr) | (1 << 16));
169 #endif
170 
171 	disable_tlb(14);
172 	disable_tlb(15);
173 
174 #ifdef CONFIG_CPM2
175 	config_8560_ioports((ccsr_cpm_t *)CONFIG_SYS_MPC85xx_CPM_ADDR);
176 #endif
177 
178 	/* Map banks 0 and 1 to the FLASH banks 0 and 1 at preliminary
179 	 * addresses - these have to be modified later when FLASH size
180 	 * has been determined
181 	 */
182 #if defined(CONFIG_SYS_OR0_REMAP)
183 	memctl->or0 = CONFIG_SYS_OR0_REMAP;
184 #endif
185 #if defined(CONFIG_SYS_OR1_REMAP)
186 	memctl->or1 = CONFIG_SYS_OR1_REMAP;
187 #endif
188 
189 	/* now restrict to preliminary range */
190 	/* if cs1 is already set via debugger, leave cs0/cs1 alone */
191 	if (! memctl->br1 & 1) {
192 #if defined(CONFIG_SYS_BR0_PRELIM) && defined(CONFIG_SYS_OR0_PRELIM)
193 		memctl->br0 = CONFIG_SYS_BR0_PRELIM;
194 		memctl->or0 = CONFIG_SYS_OR0_PRELIM;
195 #endif
196 
197 #if defined(CONFIG_SYS_BR1_PRELIM) && defined(CONFIG_SYS_OR1_PRELIM)
198 		memctl->or1 = CONFIG_SYS_OR1_PRELIM;
199 		memctl->br1 = CONFIG_SYS_BR1_PRELIM;
200 #endif
201 	}
202 
203 #if defined(CONFIG_SYS_BR2_PRELIM) && defined(CONFIG_SYS_OR2_PRELIM)
204 	memctl->or2 = CONFIG_SYS_OR2_PRELIM;
205 	memctl->br2 = CONFIG_SYS_BR2_PRELIM;
206 #endif
207 
208 #if defined(CONFIG_SYS_BR3_PRELIM) && defined(CONFIG_SYS_OR3_PRELIM)
209 	memctl->or3 = CONFIG_SYS_OR3_PRELIM;
210 	memctl->br3 = CONFIG_SYS_BR3_PRELIM;
211 #endif
212 
213 #if defined(CONFIG_SYS_BR4_PRELIM) && defined(CONFIG_SYS_OR4_PRELIM)
214 	memctl->or4 = CONFIG_SYS_OR4_PRELIM;
215 	memctl->br4 = CONFIG_SYS_BR4_PRELIM;
216 #endif
217 
218 #if defined(CONFIG_SYS_BR5_PRELIM) && defined(CONFIG_SYS_OR5_PRELIM)
219 	memctl->or5 = CONFIG_SYS_OR5_PRELIM;
220 	memctl->br5 = CONFIG_SYS_BR5_PRELIM;
221 #endif
222 
223 #if defined(CONFIG_SYS_BR6_PRELIM) && defined(CONFIG_SYS_OR6_PRELIM)
224 	memctl->or6 = CONFIG_SYS_OR6_PRELIM;
225 	memctl->br6 = CONFIG_SYS_BR6_PRELIM;
226 #endif
227 
228 #if defined(CONFIG_SYS_BR7_PRELIM) && defined(CONFIG_SYS_OR7_PRELIM)
229 	memctl->or7 = CONFIG_SYS_OR7_PRELIM;
230 	memctl->br7 = CONFIG_SYS_BR7_PRELIM;
231 #endif
232 
233 #if defined(CONFIG_CPM2)
234 	m8560_cpm_reset();
235 #endif
236 #ifdef CONFIG_QE
237 	/* Config QE ioports */
238 	config_qe_ioports();
239 #endif
240 #if defined(CONFIG_MPC8536)
241 	fsl_serdes_init();
242 #endif
243 #if defined(CONFIG_FSL_DMA)
244 	dma_init();
245 #endif
246 #ifdef CONFIG_FSL_CORENET
247 	corenet_tb_init();
248 #endif
249 	init_used_tlb_cams();
250 }
251 
252 
253 /*
254  * Initialize L2 as cache.
255  *
256  * The newer 8548, etc, parts have twice as much cache, but
257  * use the same bit-encoding as the older 8555, etc, parts.
258  *
259  */
260 
261 int cpu_init_r(void)
262 {
263 	puts ("L2:    ");
264 
265 #if defined(CONFIG_L2_CACHE)
266 	volatile ccsr_l2cache_t *l2cache = (void *)CONFIG_SYS_MPC85xx_L2_ADDR;
267 	volatile uint cache_ctl;
268 	uint svr, ver;
269 	uint l2srbar;
270 	u32 l2siz_field;
271 
272 	svr = get_svr();
273 	ver = SVR_SOC_VER(svr);
274 
275 	asm("msync;isync");
276 	cache_ctl = l2cache->l2ctl;
277 
278 #if defined(CONFIG_SYS_RAMBOOT) && defined(CONFIG_SYS_INIT_L2_ADDR)
279 	if (cache_ctl & MPC85xx_L2CTL_L2E) {
280 		/* Clear L2 SRAM memory-mapped base address */
281 		out_be32(&l2cache->l2srbar0, 0x0);
282 		out_be32(&l2cache->l2srbar1, 0x0);
283 
284 		/* set MBECCDIS=0, SBECCDIS=0 */
285 		clrbits_be32(&l2cache->l2errdis,
286 				(MPC85xx_L2ERRDIS_MBECC |
287 				 MPC85xx_L2ERRDIS_SBECC));
288 
289 		/* set L2E=0, L2SRAM=0 */
290 		clrbits_be32(&l2cache->l2ctl,
291 				(MPC85xx_L2CTL_L2E |
292 				 MPC85xx_L2CTL_L2SRAM_ENTIRE));
293 	}
294 #endif
295 
296 	l2siz_field = (cache_ctl >> 28) & 0x3;
297 
298 	switch (l2siz_field) {
299 	case 0x0:
300 		printf(" unknown size (0x%08x)\n", cache_ctl);
301 		return -1;
302 		break;
303 	case 0x1:
304 		if (ver == SVR_8540 || ver == SVR_8560   ||
305 		    ver == SVR_8541 || ver == SVR_8541_E ||
306 		    ver == SVR_8555 || ver == SVR_8555_E) {
307 			puts("128 KB ");
308 			/* set L2E=1, L2I=1, & L2BLKSZ=1 (128 Kbyte) */
309 			cache_ctl = 0xc4000000;
310 		} else {
311 			puts("256 KB ");
312 			cache_ctl = 0xc0000000; /* set L2E=1, L2I=1, & L2SRAM=0 */
313 		}
314 		break;
315 	case 0x2:
316 		if (ver == SVR_8540 || ver == SVR_8560   ||
317 		    ver == SVR_8541 || ver == SVR_8541_E ||
318 		    ver == SVR_8555 || ver == SVR_8555_E) {
319 			puts("256 KB ");
320 			/* set L2E=1, L2I=1, & L2BLKSZ=2 (256 Kbyte) */
321 			cache_ctl = 0xc8000000;
322 		} else {
323 			puts ("512 KB ");
324 			/* set L2E=1, L2I=1, & L2SRAM=0 */
325 			cache_ctl = 0xc0000000;
326 		}
327 		break;
328 	case 0x3:
329 		puts("1024 KB ");
330 		/* set L2E=1, L2I=1, & L2SRAM=0 */
331 		cache_ctl = 0xc0000000;
332 		break;
333 	}
334 
335 	if (l2cache->l2ctl & MPC85xx_L2CTL_L2E) {
336 		puts("already enabled");
337 		l2srbar = l2cache->l2srbar0;
338 #ifdef CONFIG_SYS_INIT_L2_ADDR
339 		if (l2cache->l2ctl & MPC85xx_L2CTL_L2SRAM_ENTIRE
340 				&& l2srbar >= CONFIG_SYS_FLASH_BASE) {
341 			l2srbar = CONFIG_SYS_INIT_L2_ADDR;
342 			l2cache->l2srbar0 = l2srbar;
343 			printf("moving to 0x%08x", CONFIG_SYS_INIT_L2_ADDR);
344 		}
345 #endif /* CONFIG_SYS_INIT_L2_ADDR */
346 		puts("\n");
347 	} else {
348 		asm("msync;isync");
349 		l2cache->l2ctl = cache_ctl; /* invalidate & enable */
350 		asm("msync;isync");
351 		puts("enabled\n");
352 	}
353 #elif defined(CONFIG_BACKSIDE_L2_CACHE)
354 	u32 l2cfg0 = mfspr(SPRN_L2CFG0);
355 
356 	/* invalidate the L2 cache */
357 	mtspr(SPRN_L2CSR0, (L2CSR0_L2FI|L2CSR0_L2LFC));
358 	while (mfspr(SPRN_L2CSR0) & (L2CSR0_L2FI|L2CSR0_L2LFC))
359 		;
360 
361 #ifdef CONFIG_SYS_CACHE_STASHING
362 	/* set stash id to (coreID) * 2 + 32 + L2 (1) */
363 	mtspr(SPRN_L2CSR1, (32 + 1));
364 #endif
365 
366 	/* enable the cache */
367 	mtspr(SPRN_L2CSR0, CONFIG_SYS_INIT_L2CSR0);
368 
369 	if (CONFIG_SYS_INIT_L2CSR0 & L2CSR0_L2E) {
370 		while (!(mfspr(SPRN_L2CSR0) & L2CSR0_L2E))
371 			;
372 		printf("%d KB enabled\n", (l2cfg0 & 0x3fff) * 64);
373 	}
374 #else
375 	puts("disabled\n");
376 #endif
377 #ifdef CONFIG_QE
378 	uint qe_base = CONFIG_SYS_IMMR + 0x00080000; /* QE immr base */
379 	qe_init(qe_base);
380 	qe_reset();
381 #endif
382 
383 #if defined(CONFIG_MP)
384 	setup_mp();
385 #endif
386 	return 0;
387 }
388 
389 extern void setup_ivors(void);
390 
391 void arch_preboot_os(void)
392 {
393 	u32 msr;
394 
395 	/*
396 	 * We are changing interrupt offsets and are about to boot the OS so
397 	 * we need to make sure we disable all async interrupts. EE is already
398 	 * disabled by the time we get called.
399 	 */
400 	msr = mfmsr();
401 	msr &= ~(MSR_ME|MSR_CE|MSR_DE);
402 	mtmsr(msr);
403 
404 	setup_ivors();
405 }
406