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>
44 #if defined(CONFIG_OF_LIBFDT)
46 #include <libfdt_env.h>
47 #include <fdt_support.h>
50 DECLARE_GLOBAL_DATA_PTR;
52 static char *cpu_warning = "\n " \
53 "*** Warning: CPU Core has Silicon Bugs -- Check the Errata ***";
55 #if ((defined(CONFIG_MPC86x) || defined(CONFIG_MPC855)) && \
56 !defined(CONFIG_MPC862))
58 static int check_CPU (long clock, uint pvr, uint immr)
61 # if defined(CONFIG_MPC855)
63 # elif defined(CONFIG_MPC860P)
68 volatile immap_t *immap = (immap_t *) (immr & 0xFFFF0000);
75 /* the highest 16 bits should be 0x0050 for a 860 */
77 if ((pvr >> 16) != 0x0050)
80 k = (immr << 16) | *((ushort *) & immap->im_cpm.cp_dparam[0xB0]);
85 * Some boards use sockets so different CPUs can be used.
86 * We have to check chip version in run time.
89 case 0x00020001: pre = 'P'; break;
90 case 0x00030001: break;
91 case 0x00120003: suf = "A"; break;
92 case 0x00130003: suf = "A3"; break;
94 case 0x00200004: suf = "B"; break;
96 case 0x00300004: suf = "C"; break;
97 case 0x00310004: suf = "C1"; m = 1; break;
99 case 0x00200064: mid = "SR"; suf = "B"; break;
100 case 0x00300065: mid = "SR"; suf = "C"; break;
101 case 0x00310065: mid = "SR"; suf = "C1"; m = 1; break;
102 case 0x05010000: suf = "D3"; m = 1; break;
103 case 0x05020000: suf = "D4"; m = 1; break;
104 /* this value is not documented anywhere */
105 case 0x40000000: pre = 'P'; suf = "D"; m = 1; break;
106 /* MPC866P/MPC866T/MPC859T/MPC859DSL/MPC852T */
107 case 0x08010004: /* Rev. A.0 */
110 case 0x08000003: /* Rev. 0.3 */
114 # if defined(CONFIG_MPC852T)
116 # elif defined(CONFIG_MPC859T)
118 # elif defined(CONFIG_MPC859DSL)
120 # elif defined(CONFIG_MPC866T)
123 "PC866x"; /* Unknown chip from MPC866 family */
126 case 0x09000000: pre = 'M'; mid = suf = ""; m = 1;
128 id_str = "PC885"; /* 870/875/880/885 */
131 default: suf = NULL; break;
135 id_str = "PC86x"; /* Unknown 86x chip */
137 printf ("%c%s%sZPnn%s", pre, id_str, mid, suf);
139 printf ("unknown M%s (0x%08x)", id_str, k);
142 #if defined(CONFIG_SYS_8xx_CPUCLK_MIN) && defined(CONFIG_SYS_8xx_CPUCLK_MAX)
143 printf (" at %s MHz [%d.%d...%d.%d MHz]\n ",
145 CONFIG_SYS_8xx_CPUCLK_MIN / 1000000,
146 ((CONFIG_SYS_8xx_CPUCLK_MIN % 1000000) + 50000) / 100000,
147 CONFIG_SYS_8xx_CPUCLK_MAX / 1000000,
148 ((CONFIG_SYS_8xx_CPUCLK_MAX % 1000000) + 50000) / 100000
151 printf (" at %s MHz: ", strmhz (buf, clock));
153 printf ("%u kB I-Cache %u kB D-Cache",
154 checkicache () >> 10,
158 /* do we have a FEC (860T/P or 852/859/866/885)? */
160 immap->im_cpm.cp_fec.fec_addr_low = 0x12345678;
161 if (immap->im_cpm.cp_fec.fec_addr_low == 0x12345678) {
162 printf (" FEC present");
172 if(clock != measure_gclk()) {
173 printf ("clock %ldHz != %dHz\n", clock, measure_gclk());
180 #elif defined(CONFIG_MPC862)
182 static int check_CPU (long clock, uint pvr, uint immr)
184 volatile immap_t *immap = (immap_t *) (immr & 0xFFFF0000);
191 /* the highest 16 bits should be 0x0050 for a 8xx */
193 if ((pvr >> 16) != 0x0050)
196 k = (immr << 16) | *((ushort *) & immap->im_cpm.cp_dparam[0xB0]);
201 /* this value is not documented anywhere */
202 case 0x06000000: mid = "P"; suf = "0"; break;
203 case 0x06010001: mid = "P"; suf = "A"; m = 1; break;
204 case 0x07000003: mid = "P"; suf = "B"; m = 1; break;
205 default: suf = NULL; break;
208 #ifndef CONFIG_MPC857
210 printf ("%cPC862%sZPnn%s", pre, mid, suf);
212 printf ("unknown MPC862 (0x%08x)", k);
215 printf ("%cPC857TZPnn%s", pre, suf); /* only 857T tested right now! */
217 printf ("unknown MPC857 (0x%08x)", k);
220 printf (" at %s MHz:", strmhz (buf, clock));
222 printf (" %u kB I-Cache", checkicache () >> 10);
223 printf (" %u kB D-Cache", checkdcache () >> 10);
225 /* lets check and see if we're running on a 862T (or P?) */
227 immap->im_cpm.cp_fec.fec_addr_low = 0x12345678;
228 if (immap->im_cpm.cp_fec.fec_addr_low == 0x12345678) {
229 printf (" FEC present");
241 #elif defined(CONFIG_MPC823)
243 static int check_CPU (long clock, uint pvr, uint immr)
245 volatile immap_t *immap = (immap_t *) (immr & 0xFFFF0000);
250 /* the highest 16 bits should be 0x0050 for a 8xx */
252 if ((pvr >> 16) != 0x0050)
255 k = (immr << 16) | *((ushort *) & immap->im_cpm.cp_dparam[0xB0]);
260 case 0x20000000: suf = "0"; break;
261 case 0x20010000: suf = "0.1"; break;
262 case 0x20020000: suf = "Z2/3"; break;
263 case 0x20020001: suf = "Z3"; break;
264 case 0x21000000: suf = "A"; break;
265 case 0x21010000: suf = "B"; m = 1; break;
266 case 0x21010001: suf = "B2"; m = 1; break;
268 case 0x24010000: suf = NULL;
269 puts ("PPC823EZTnnB2");
274 printf ("unknown MPC823 (0x%08x)", k);
278 printf ("PPC823ZTnn%s", suf);
280 printf (" at %s MHz:", strmhz (buf, clock));
282 printf (" %u kB I-Cache", checkicache () >> 10);
283 printf (" %u kB D-Cache", checkdcache () >> 10);
285 /* lets check and see if we're running on a 860T (or P?) */
287 immap->im_cpm.cp_fec.fec_addr_low = 0x12345678;
288 if (immap->im_cpm.cp_fec.fec_addr_low == 0x12345678) {
289 puts (" FEC present");
301 #elif defined(CONFIG_MPC850)
303 static int check_CPU (long clock, uint pvr, uint immr)
305 volatile immap_t *immap = (immap_t *) (immr & 0xFFFF0000);
309 /* the highest 16 bits should be 0x0050 for a 8xx */
311 if ((pvr >> 16) != 0x0050)
314 k = (immr << 16) | *((ushort *) & immap->im_cpm.cp_dparam[0xB0]);
319 printf ("XPC850xxZT");
322 printf ("XPC850xxZTA");
325 printf ("XPC850xxZTB");
329 printf ("XPC850xxZTC");
333 printf ("unknown MPC850 (0x%08x)", k);
335 printf (" at %s MHz:", strmhz (buf, clock));
337 printf (" %u kB I-Cache", checkicache () >> 10);
338 printf (" %u kB D-Cache", checkdcache () >> 10);
340 /* lets check and see if we're running on a 850T (or P?) */
342 immap->im_cpm.cp_fec.fec_addr_low = 0x12345678;
343 if (immap->im_cpm.cp_fec.fec_addr_low == 0x12345678) {
344 printf (" FEC present");
358 /* ------------------------------------------------------------------------- */
362 ulong clock = gd->cpu_clk;
363 uint immr = get_immr (0); /* Return full IMMR contents */
364 uint pvr = get_pvr ();
368 /* 850 has PARTNUM 20 */
369 /* 801 has PARTNUM 10 */
370 return check_CPU (clock, pvr, immr);
373 /* ------------------------------------------------------------------------- */
375 /* the standard 860 has 128 sets of 16 bytes in 2 ways (= 4 kB) */
376 /* the 860 P (plus) has 256 sets of 16 bytes in 4 ways (= 16 kB) */
378 int checkicache (void)
380 volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
381 volatile memctl8xx_t *memctl = &immap->im_memctl;
382 u32 cacheon = rd_ic_cst () & IDC_ENABLED;
385 u32 k = memctl->memc_br1 & ~0x00007fff; /* probe in flash memoryarea */
387 u32 k = memctl->memc_br0 & ~0x00007fff; /* probe in flash memoryarea */
392 wr_ic_cst (IDC_UNALL);
393 wr_ic_cst (IDC_INVALL);
394 wr_ic_cst (IDC_DISABLE);
395 __asm__ volatile ("isync");
397 while (!((m = rd_ic_cst ()) & IDC_CERR2)) {
399 wr_ic_cst (IDC_LDLCK);
400 __asm__ volatile ("isync");
403 k += 0x10; /* the number of bytes in a cacheline */
406 wr_ic_cst (IDC_UNALL);
407 wr_ic_cst (IDC_INVALL);
410 wr_ic_cst (IDC_ENABLE);
412 wr_ic_cst (IDC_DISABLE);
414 __asm__ volatile ("isync");
419 /* ------------------------------------------------------------------------- */
421 /* the standard 860 has 128 sets of 16 bytes in 2 ways (= 4 kB) */
422 /* the 860 P (plus) has 256 sets of 16 bytes in 2 ways (= 8 kB) */
423 /* call with cache disabled */
425 int checkdcache (void)
427 volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
428 volatile memctl8xx_t *memctl = &immap->im_memctl;
429 u32 cacheon = rd_dc_cst () & IDC_ENABLED;
432 u32 k = memctl->memc_br1 & ~0x00007fff; /* probe in flash memoryarea */
434 u32 k = memctl->memc_br0 & ~0x00007fff; /* probe in flash memoryarea */
439 wr_dc_cst (IDC_UNALL);
440 wr_dc_cst (IDC_INVALL);
441 wr_dc_cst (IDC_DISABLE);
443 while (!((m = rd_dc_cst ()) & IDC_CERR2)) {
445 wr_dc_cst (IDC_LDLCK);
447 k += 0x10; /* the number of bytes in a cacheline */
450 wr_dc_cst (IDC_UNALL);
451 wr_dc_cst (IDC_INVALL);
454 wr_dc_cst (IDC_ENABLE);
456 wr_dc_cst (IDC_DISABLE);
461 /* ------------------------------------------------------------------------- */
463 void upmconfig (uint upm, uint * table, uint size)
467 volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
468 volatile memctl8xx_t *memctl = &immap->im_memctl;
470 for (i = 0; i < size; i++) {
471 memctl->memc_mdr = table[i]; /* (16-15) */
472 memctl->memc_mcr = addr | upm; /* (16-16) */
477 /* ------------------------------------------------------------------------- */
481 int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
485 volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
487 immap->im_clkrst.car_plprcr |= PLPRCR_CSR; /* Checkstop Reset enable */
489 /* Interrupts and MMU off */
490 __asm__ volatile ("mtspr 81, 0");
491 __asm__ volatile ("mfmsr %0":"=r" (msr));
494 __asm__ volatile ("mtmsr %0"::"r" (msr));
497 * Trying to execute the next instruction at a non-existing address
498 * should cause a machine check, resulting in reset
500 #ifdef CONFIG_SYS_RESET_ADDRESS
501 addr = CONFIG_SYS_RESET_ADDRESS;
504 * note: when CONFIG_SYS_MONITOR_BASE points to a RAM address, CONFIG_SYS_MONITOR_BASE
505 * - sizeof (ulong) is usually a valid address. Better pick an address
506 * known to be invalid on your system and assign it to CONFIG_SYS_RESET_ADDRESS.
507 * "(ulong)-1" used to be a good choice for many systems...
509 addr = CONFIG_SYS_MONITOR_BASE - sizeof (ulong);
511 ((void (*)(void)) addr) ();
515 #else /* CONFIG_LWMON */
518 * On the LWMON board, the MCLR reset input of the PIC's on the board
519 * uses a 47K/1n RC combination which has a 47us time constant. The
520 * low signal on the HRESET pin of the CPU is only 512 clocks = 8 us
521 * and thus too short to reset the external hardware. So we use the
522 * watchdog to reset the board.
524 int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
526 /* prevent triggering the watchdog */
527 disable_interrupts ();
529 /* make sure the watchdog is running */
530 reset_8xx_watchdog ((immap_t *) CONFIG_SYS_IMMR);
532 /* wait for watchdog reset */
539 #endif /* CONFIG_LWMON */
541 /* ------------------------------------------------------------------------- */
544 * Get timebase clock frequency (like cpu_clk in Hz)
546 * See sections 14.2 and 14.6 of the User's Manual
548 unsigned long get_tbclk (void)
550 uint immr = get_immr (0); /* Return full IMMR contents */
551 volatile immap_t *immap = (volatile immap_t *)(immr & 0xFFFF0000);
552 ulong oscclk, factor, pll;
554 if (immap->im_clkrst.car_sccr & SCCR_TBS) {
555 return (gd->cpu_clk / 16);
558 pll = immap->im_clkrst.car_plprcr;
560 #define PLPRCR_val(a) ((pll & PLPRCR_ ## a ## _MSK) >> PLPRCR_ ## a ## _SHIFT)
563 * For newer PQ1 chips (MPC866/87x/88x families), PLL multiplication
564 * factor is calculated as follows:
569 * factor = -----------------
572 * For older chips, it's just MF field of PLPRCR plus one.
574 if ((immr & 0x0FFF) >= MPC8xx_NEW_CLK) { /* MPC866/87x/88x series */
575 factor = (PLPRCR_val(MFI) + PLPRCR_val(MFN)/(PLPRCR_val(MFD)+1))/
576 (PLPRCR_val(PDF)+1) / (1<<PLPRCR_val(S));
578 factor = PLPRCR_val(MF)+1;
581 oscclk = gd->cpu_clk / factor;
583 if ((immap->im_clkrst.car_sccr & SCCR_RTSEL) == 0 || factor > 2) {
586 return (oscclk / 16);
589 /* ------------------------------------------------------------------------- */
591 #if defined(CONFIG_WATCHDOG)
592 void watchdog_reset (void)
594 int re_enable = disable_interrupts ();
596 reset_8xx_watchdog ((immap_t *) CONFIG_SYS_IMMR);
598 enable_interrupts ();
600 #endif /* CONFIG_WATCHDOG */
602 #if defined(CONFIG_WATCHDOG) || defined(CONFIG_LWMON)
604 void reset_8xx_watchdog (volatile immap_t * immr)
606 # if defined(CONFIG_LWMON)
608 * The LWMON board uses a MAX6301 Watchdog
609 * with the trigger pin connected to port PA.7
611 * (The old board version used a MAX706TESA Watchdog, which
612 * had to be handled exactly the same.)
614 # define WATCHDOG_BIT 0x0100
615 immr->im_ioport.iop_papar &= ~(WATCHDOG_BIT); /* GPIO */
616 immr->im_ioport.iop_padir |= WATCHDOG_BIT; /* Output */
617 immr->im_ioport.iop_paodr &= ~(WATCHDOG_BIT); /* active output */
619 immr->im_ioport.iop_padat ^= WATCHDOG_BIT; /* Toggle WDI */
620 # elif defined(CONFIG_KUP4K) || defined(CONFIG_KUP4X)
622 * The KUP4 boards uses a TPS3705 Watchdog
623 * with the trigger pin connected to port PA.5
625 # define WATCHDOG_BIT 0x0400
626 immr->im_ioport.iop_papar &= ~(WATCHDOG_BIT); /* GPIO */
627 immr->im_ioport.iop_padir |= WATCHDOG_BIT; /* Output */
628 immr->im_ioport.iop_paodr &= ~(WATCHDOG_BIT); /* active output */
630 immr->im_ioport.iop_padat ^= WATCHDOG_BIT; /* Toggle WDI */
633 * All other boards use the MPC8xx Internal Watchdog
635 immr->im_siu_conf.sc_swsr = 0x556c; /* write magic1 */
636 immr->im_siu_conf.sc_swsr = 0xaa39; /* write magic2 */
637 # endif /* CONFIG_LWMON */
639 #endif /* CONFIG_WATCHDOG */
642 * Initializes on-chip ethernet controllers.
643 * to override, implement board_eth_init()
645 int cpu_eth_init(bd_t *bis)
647 #if defined(SCC_ENET) && defined(CONFIG_CMD_NET)
650 #if defined(FEC_ENET)