2 * (C) Copyright 2000-2002
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,
29 * written or collected and sometimes rewritten by
30 * Magnus Damm <damm@bitsmart.com>
32 * minor modifications by
33 * Wolfgang Denk <wd@denx.de>
42 #include <asm/cache.h>
43 #include <linux/compiler.h>
46 #if defined(CONFIG_OF_LIBFDT)
48 #include <fdt_support.h>
51 DECLARE_GLOBAL_DATA_PTR;
53 static char *cpu_warning = "\n " \
54 "*** Warning: CPU Core has Silicon Bugs -- Check the Errata ***";
56 #if ((defined(CONFIG_MPC86x) || defined(CONFIG_MPC855)) && \
57 !defined(CONFIG_MPC862))
59 static int check_CPU (long clock, uint pvr, uint immr)
62 # if defined(CONFIG_MPC855)
64 # elif defined(CONFIG_MPC860P)
69 volatile immap_t *immap = (immap_t *) (immr & 0xFFFF0000);
76 /* the highest 16 bits should be 0x0050 for a 860 */
78 if ((pvr >> 16) != 0x0050)
82 immap->im_cpm.cp_dparam16[PROFF_REVNUM / sizeof(u16)];
87 * Some boards use sockets so different CPUs can be used.
88 * We have to check chip version in run time.
91 case 0x00020001: pre = 'P'; break;
92 case 0x00030001: break;
93 case 0x00120003: suf = "A"; break;
94 case 0x00130003: suf = "A3"; break;
96 case 0x00200004: suf = "B"; break;
98 case 0x00300004: suf = "C"; break;
99 case 0x00310004: suf = "C1"; m = 1; break;
101 case 0x00200064: mid = "SR"; suf = "B"; break;
102 case 0x00300065: mid = "SR"; suf = "C"; break;
103 case 0x00310065: mid = "SR"; suf = "C1"; m = 1; break;
104 case 0x05010000: suf = "D3"; m = 1; break;
105 case 0x05020000: suf = "D4"; m = 1; break;
106 /* this value is not documented anywhere */
107 case 0x40000000: pre = 'P'; suf = "D"; m = 1; break;
108 /* MPC866P/MPC866T/MPC859T/MPC859DSL/MPC852T */
109 case 0x08010004: /* Rev. A.0 */
112 case 0x08000003: /* Rev. 0.3 */
116 # if defined(CONFIG_MPC852T)
118 # elif defined(CONFIG_MPC859T)
120 # elif defined(CONFIG_MPC859DSL)
122 # elif defined(CONFIG_MPC866T)
125 "PC866x"; /* Unknown chip from MPC866 family */
128 case 0x09000000: pre = 'M'; mid = suf = ""; m = 1;
130 id_str = "PC885"; /* 870/875/880/885 */
133 default: suf = NULL; break;
137 id_str = "PC86x"; /* Unknown 86x chip */
139 printf ("%c%s%sZPnn%s", pre, id_str, mid, suf);
141 printf ("unknown M%s (0x%08x)", id_str, k);
144 #if defined(CONFIG_SYS_8xx_CPUCLK_MIN) && defined(CONFIG_SYS_8xx_CPUCLK_MAX)
145 printf (" at %s MHz [%d.%d...%d.%d MHz]\n ",
147 CONFIG_SYS_8xx_CPUCLK_MIN / 1000000,
148 ((CONFIG_SYS_8xx_CPUCLK_MIN % 1000000) + 50000) / 100000,
149 CONFIG_SYS_8xx_CPUCLK_MAX / 1000000,
150 ((CONFIG_SYS_8xx_CPUCLK_MAX % 1000000) + 50000) / 100000
153 printf (" at %s MHz: ", strmhz (buf, clock));
155 printf ("%u kB I-Cache %u kB D-Cache",
156 checkicache () >> 10,
160 /* do we have a FEC (860T/P or 852/859/866/885)? */
162 immap->im_cpm.cp_fec.fec_addr_low = 0x12345678;
163 if (immap->im_cpm.cp_fec.fec_addr_low == 0x12345678) {
164 printf (" FEC present");
174 if(clock != measure_gclk()) {
175 printf ("clock %ldHz != %dHz\n", clock, measure_gclk());
182 #elif defined(CONFIG_MPC862)
184 static int check_CPU (long clock, uint pvr, uint immr)
186 volatile immap_t *immap = (immap_t *) (immr & 0xFFFF0000);
190 __maybe_unused char *mid = "xx";
193 /* the highest 16 bits should be 0x0050 for a 8xx */
195 if ((pvr >> 16) != 0x0050)
199 immap->im_cpm.cp_dparam16[PROFF_REVNUM / sizeof(u16)];
204 /* this value is not documented anywhere */
205 case 0x06000000: mid = "P"; suf = "0"; break;
206 case 0x06010001: mid = "P"; suf = "A"; m = 1; break;
207 case 0x07000003: mid = "P"; suf = "B"; m = 1; break;
208 default: suf = NULL; break;
211 #ifndef CONFIG_MPC857
213 printf ("%cPC862%sZPnn%s", pre, mid, suf);
215 printf ("unknown MPC862 (0x%08x)", k);
218 printf ("%cPC857TZPnn%s", pre, suf); /* only 857T tested right now! */
220 printf ("unknown MPC857 (0x%08x)", k);
223 printf (" at %s MHz:", strmhz (buf, clock));
225 printf (" %u kB I-Cache", checkicache () >> 10);
226 printf (" %u kB D-Cache", checkdcache () >> 10);
228 /* lets check and see if we're running on a 862T (or P?) */
230 immap->im_cpm.cp_fec.fec_addr_low = 0x12345678;
231 if (immap->im_cpm.cp_fec.fec_addr_low == 0x12345678) {
232 printf (" FEC present");
244 #elif defined(CONFIG_MPC823)
246 static int check_CPU (long clock, uint pvr, uint immr)
248 volatile immap_t *immap = (immap_t *) (immr & 0xFFFF0000);
253 /* the highest 16 bits should be 0x0050 for a 8xx */
255 if ((pvr >> 16) != 0x0050)
259 in_be16(&immap->im_cpm.cp_dparam16[PROFF_REVNUM / sizeof(u16)]);
264 case 0x20000000: suf = "0"; break;
265 case 0x20010000: suf = "0.1"; break;
266 case 0x20020000: suf = "Z2/3"; break;
267 case 0x20020001: suf = "Z3"; break;
268 case 0x21000000: suf = "A"; break;
269 case 0x21010000: suf = "B"; m = 1; break;
270 case 0x21010001: suf = "B2"; m = 1; break;
272 case 0x24010000: suf = NULL;
273 puts ("PPC823EZTnnB2");
278 printf ("unknown MPC823 (0x%08x)", k);
282 printf ("PPC823ZTnn%s", suf);
284 printf (" at %s MHz:", strmhz (buf, clock));
286 printf (" %u kB I-Cache", checkicache () >> 10);
287 printf (" %u kB D-Cache", checkdcache () >> 10);
289 /* lets check and see if we're running on a 860T (or P?) */
291 immap->im_cpm.cp_fec.fec_addr_low = 0x12345678;
292 if (immap->im_cpm.cp_fec.fec_addr_low == 0x12345678) {
293 puts (" FEC present");
305 #elif defined(CONFIG_MPC850)
307 static int check_CPU (long clock, uint pvr, uint immr)
309 volatile immap_t *immap = (immap_t *) (immr & 0xFFFF0000);
313 /* the highest 16 bits should be 0x0050 for a 8xx */
315 if ((pvr >> 16) != 0x0050)
319 immap->im_cpm.cp_dparam16[PROFF_REVNUM / sizeof(u16)];
324 printf ("XPC850xxZT");
327 printf ("XPC850xxZTA");
330 printf ("XPC850xxZTB");
334 printf ("XPC850xxZTC");
338 printf ("unknown MPC850 (0x%08x)", k);
340 printf (" at %s MHz:", strmhz (buf, clock));
342 printf (" %u kB I-Cache", checkicache () >> 10);
343 printf (" %u kB D-Cache", checkdcache () >> 10);
345 /* lets check and see if we're running on a 850T (or P?) */
347 immap->im_cpm.cp_fec.fec_addr_low = 0x12345678;
348 if (immap->im_cpm.cp_fec.fec_addr_low == 0x12345678) {
349 printf (" FEC present");
363 /* ------------------------------------------------------------------------- */
367 ulong clock = gd->cpu_clk;
368 uint immr = get_immr (0); /* Return full IMMR contents */
369 uint pvr = get_pvr ();
373 /* 850 has PARTNUM 20 */
374 /* 801 has PARTNUM 10 */
375 return check_CPU (clock, pvr, immr);
378 /* ------------------------------------------------------------------------- */
380 /* the standard 860 has 128 sets of 16 bytes in 2 ways (= 4 kB) */
381 /* the 860 P (plus) has 256 sets of 16 bytes in 4 ways (= 16 kB) */
383 int checkicache (void)
385 volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
386 volatile memctl8xx_t *memctl = &immap->im_memctl;
387 u32 cacheon = rd_ic_cst () & IDC_ENABLED;
390 u32 k = memctl->memc_br1 & ~0x00007fff; /* probe in flash memoryarea */
392 u32 k = memctl->memc_br0 & ~0x00007fff; /* probe in flash memoryarea */
397 wr_ic_cst (IDC_UNALL);
398 wr_ic_cst (IDC_INVALL);
399 wr_ic_cst (IDC_DISABLE);
400 __asm__ volatile ("isync");
402 while (!((m = rd_ic_cst ()) & IDC_CERR2)) {
404 wr_ic_cst (IDC_LDLCK);
405 __asm__ volatile ("isync");
408 k += 0x10; /* the number of bytes in a cacheline */
411 wr_ic_cst (IDC_UNALL);
412 wr_ic_cst (IDC_INVALL);
415 wr_ic_cst (IDC_ENABLE);
417 wr_ic_cst (IDC_DISABLE);
419 __asm__ volatile ("isync");
424 /* ------------------------------------------------------------------------- */
426 /* the standard 860 has 128 sets of 16 bytes in 2 ways (= 4 kB) */
427 /* the 860 P (plus) has 256 sets of 16 bytes in 2 ways (= 8 kB) */
428 /* call with cache disabled */
430 int checkdcache (void)
432 volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
433 volatile memctl8xx_t *memctl = &immap->im_memctl;
434 u32 cacheon = rd_dc_cst () & IDC_ENABLED;
437 u32 k = memctl->memc_br1 & ~0x00007fff; /* probe in flash memoryarea */
439 u32 k = memctl->memc_br0 & ~0x00007fff; /* probe in flash memoryarea */
444 wr_dc_cst (IDC_UNALL);
445 wr_dc_cst (IDC_INVALL);
446 wr_dc_cst (IDC_DISABLE);
448 while (!((m = rd_dc_cst ()) & IDC_CERR2)) {
450 wr_dc_cst (IDC_LDLCK);
452 k += 0x10; /* the number of bytes in a cacheline */
455 wr_dc_cst (IDC_UNALL);
456 wr_dc_cst (IDC_INVALL);
459 wr_dc_cst (IDC_ENABLE);
461 wr_dc_cst (IDC_DISABLE);
466 /* ------------------------------------------------------------------------- */
468 void upmconfig (uint upm, uint * table, uint size)
472 volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
473 volatile memctl8xx_t *memctl = &immap->im_memctl;
475 for (i = 0; i < size; i++) {
476 memctl->memc_mdr = table[i]; /* (16-15) */
477 memctl->memc_mcr = addr | upm; /* (16-16) */
482 /* ------------------------------------------------------------------------- */
486 int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
490 volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
492 immap->im_clkrst.car_plprcr |= PLPRCR_CSR; /* Checkstop Reset enable */
494 /* Interrupts and MMU off */
495 __asm__ volatile ("mtspr 81, 0");
496 __asm__ volatile ("mfmsr %0":"=r" (msr));
499 __asm__ volatile ("mtmsr %0"::"r" (msr));
502 * Trying to execute the next instruction at a non-existing address
503 * should cause a machine check, resulting in reset
505 #ifdef CONFIG_SYS_RESET_ADDRESS
506 addr = CONFIG_SYS_RESET_ADDRESS;
509 * note: when CONFIG_SYS_MONITOR_BASE points to a RAM address, CONFIG_SYS_MONITOR_BASE
510 * - sizeof (ulong) is usually a valid address. Better pick an address
511 * known to be invalid on your system and assign it to CONFIG_SYS_RESET_ADDRESS.
512 * "(ulong)-1" used to be a good choice for many systems...
514 addr = CONFIG_SYS_MONITOR_BASE - sizeof (ulong);
516 ((void (*)(void)) addr) ();
520 #else /* CONFIG_LWMON */
523 * On the LWMON board, the MCLR reset input of the PIC's on the board
524 * uses a 47K/1n RC combination which has a 47us time constant. The
525 * low signal on the HRESET pin of the CPU is only 512 clocks = 8 us
526 * and thus too short to reset the external hardware. So we use the
527 * watchdog to reset the board.
529 int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
531 /* prevent triggering the watchdog */
532 disable_interrupts ();
534 /* make sure the watchdog is running */
535 reset_8xx_watchdog ((immap_t *) CONFIG_SYS_IMMR);
537 /* wait for watchdog reset */
544 #endif /* CONFIG_LWMON */
546 /* ------------------------------------------------------------------------- */
549 * Get timebase clock frequency (like cpu_clk in Hz)
551 * See sections 14.2 and 14.6 of the User's Manual
553 unsigned long get_tbclk (void)
555 uint immr = get_immr (0); /* Return full IMMR contents */
556 volatile immap_t *immap = (volatile immap_t *)(immr & 0xFFFF0000);
557 ulong oscclk, factor, pll;
559 if (immap->im_clkrst.car_sccr & SCCR_TBS) {
560 return (gd->cpu_clk / 16);
563 pll = immap->im_clkrst.car_plprcr;
565 #define PLPRCR_val(a) ((pll & PLPRCR_ ## a ## _MSK) >> PLPRCR_ ## a ## _SHIFT)
568 * For newer PQ1 chips (MPC866/87x/88x families), PLL multiplication
569 * factor is calculated as follows:
574 * factor = -----------------
577 * For older chips, it's just MF field of PLPRCR plus one.
579 if ((immr & 0x0FFF) >= MPC8xx_NEW_CLK) { /* MPC866/87x/88x series */
580 factor = (PLPRCR_val(MFI) + PLPRCR_val(MFN)/(PLPRCR_val(MFD)+1))/
581 (PLPRCR_val(PDF)+1) / (1<<PLPRCR_val(S));
583 factor = PLPRCR_val(MF)+1;
586 oscclk = gd->cpu_clk / factor;
588 if ((immap->im_clkrst.car_sccr & SCCR_RTSEL) == 0 || factor > 2) {
591 return (oscclk / 16);
594 /* ------------------------------------------------------------------------- */
596 #if defined(CONFIG_WATCHDOG)
597 void watchdog_reset (void)
599 int re_enable = disable_interrupts ();
601 reset_8xx_watchdog ((immap_t *) CONFIG_SYS_IMMR);
603 enable_interrupts ();
605 #endif /* CONFIG_WATCHDOG */
607 #if defined(CONFIG_WATCHDOG) || defined(CONFIG_LWMON)
609 void reset_8xx_watchdog (volatile immap_t * immr)
611 # if defined(CONFIG_LWMON)
613 * The LWMON board uses a MAX6301 Watchdog
614 * with the trigger pin connected to port PA.7
616 * (The old board version used a MAX706TESA Watchdog, which
617 * had to be handled exactly the same.)
619 # define WATCHDOG_BIT 0x0100
620 immr->im_ioport.iop_papar &= ~(WATCHDOG_BIT); /* GPIO */
621 immr->im_ioport.iop_padir |= WATCHDOG_BIT; /* Output */
622 immr->im_ioport.iop_paodr &= ~(WATCHDOG_BIT); /* active output */
624 immr->im_ioport.iop_padat ^= WATCHDOG_BIT; /* Toggle WDI */
625 # elif defined(CONFIG_KUP4K) || defined(CONFIG_KUP4X)
627 * The KUP4 boards uses a TPS3705 Watchdog
628 * with the trigger pin connected to port PA.5
630 # define WATCHDOG_BIT 0x0400
631 immr->im_ioport.iop_papar &= ~(WATCHDOG_BIT); /* GPIO */
632 immr->im_ioport.iop_padir |= WATCHDOG_BIT; /* Output */
633 immr->im_ioport.iop_paodr &= ~(WATCHDOG_BIT); /* active output */
635 immr->im_ioport.iop_padat ^= WATCHDOG_BIT; /* Toggle WDI */
638 * All other boards use the MPC8xx Internal Watchdog
640 immr->im_siu_conf.sc_swsr = 0x556c; /* write magic1 */
641 immr->im_siu_conf.sc_swsr = 0xaa39; /* write magic2 */
642 # endif /* CONFIG_LWMON */
644 #endif /* CONFIG_WATCHDOG */
647 * Initializes on-chip ethernet controllers.
648 * to override, implement board_eth_init()
650 int cpu_eth_init(bd_t *bis)
652 #if defined(SCC_ENET) && defined(CONFIG_CMD_NET)
655 #if defined(FEC_ENET)