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>
40 #include <asm/cache.h>
42 static char *cpu_warning = "\n " \
43 "*** Warning: CPU Core has Silicon Bugs -- Check the Errata ***";
45 #if ((defined(CONFIG_MPC86x) || defined(CONFIG_MPC855)) && \
46 !defined(CONFIG_MPC862))
48 static int check_CPU (long clock, uint pvr, uint immr)
51 # if defined(CONFIG_MPC855)
53 # elif defined(CONFIG_MPC860P)
58 volatile immap_t *immap = (immap_t *) (immr & 0xFFFF0000);
65 /* the highest 16 bits should be 0x0050 for a 860 */
67 if ((pvr >> 16) != 0x0050)
70 k = (immr << 16) | *((ushort *) & immap->im_cpm.cp_dparam[0xB0]);
74 * Some boards use sockets so different CPUs can be used.
75 * We have to check chip version in run time.
78 case 0x00020001: pre = 'P'; suf = ""; break;
79 case 0x00030001: suf = ""; break;
80 case 0x00120003: suf = "A"; break;
81 case 0x00130003: suf = "A3"; break;
83 case 0x00200004: suf = "B"; break;
85 case 0x00300004: suf = "C"; break;
86 case 0x00310004: suf = "C1"; m = 1; break;
88 case 0x00200064: mid = "SR"; suf = "B"; break;
89 case 0x00300065: mid = "SR"; suf = "C"; break;
90 case 0x00310065: mid = "SR"; suf = "C1"; m = 1; break;
91 case 0x05010000: suf = "D3"; m = 1; break;
92 case 0x05020000: suf = "D4"; m = 1; break;
93 /* this value is not documented anywhere */
94 case 0x40000000: pre = 'P'; suf = "D"; m = 1; break;
95 /* MPC866P/MPC866T/MPC859T/MPC859DSL/MPC852T */
96 case 0x08000003: pre = 'M'; suf = ""; m = 1;
99 # if defined(CONFIG_MPC852T)
101 # elif defined(CONFIG_MPC859T)
103 # elif defined(CONFIG_MPC859DSL)
105 # elif defined(CONFIG_MPC866T)
108 "PC866x"; /* Unknown chip from MPC866 family */
111 case 0x09000000: pre = 'M'; mid = suf = ""; m = 1;
113 id_str = "PC885"; /* 870/875/880/885 */
116 default: suf = NULL; break;
120 id_str = "PC86x"; /* Unknown 86x chip */
122 printf ("%c%s%sZPnn%s", pre, id_str, mid, suf);
124 printf ("unknown M%s (0x%08x)", id_str, k);
127 #if defined(CFG_8xx_CPUCLK_MIN) && defined(CFG_8xx_CPUCLK_MAX)
128 printf (" at %s MHz [%d.%d...%d.%d MHz]\n ",
130 CFG_8xx_CPUCLK_MIN / 1000000,
131 ((CFG_8xx_CPUCLK_MIN % 1000000) + 50000) / 100000,
132 CFG_8xx_CPUCLK_MAX / 1000000,
133 ((CFG_8xx_CPUCLK_MAX % 1000000) + 50000) / 100000
136 printf (" at %s MHz: ", strmhz (buf, clock));
138 printf ("%u kB I-Cache %u kB D-Cache",
139 checkicache () >> 10,
143 /* do we have a FEC (860T/P or 852/859/866/885)? */
145 immap->im_cpm.cp_fec.fec_addr_low = 0x12345678;
146 if (immap->im_cpm.cp_fec.fec_addr_low == 0x12345678) {
147 printf (" FEC present");
157 if(clock != measure_gclk()) {
158 printf ("clock %ldHz != %dHz\n", clock, measure_gclk());
165 #elif defined(CONFIG_MPC862)
167 static int check_CPU (long clock, uint pvr, uint immr)
169 volatile immap_t *immap = (immap_t *) (immr & 0xFFFF0000);
176 /* the highest 16 bits should be 0x0050 for a 8xx */
178 if ((pvr >> 16) != 0x0050)
181 k = (immr << 16) | *((ushort *) & immap->im_cpm.cp_dparam[0xB0]);
186 /* this value is not documented anywhere */
187 case 0x06000000: mid = "P"; suf = "0"; break;
188 case 0x06010001: mid = "P"; suf = "A"; m = 1; break;
189 case 0x07000003: mid = "P"; suf = "B"; m = 1; break;
190 default: suf = NULL; break;
193 #ifndef CONFIG_MPC857
195 printf ("%cPC862%sZPnn%s", pre, mid, suf);
197 printf ("unknown MPC862 (0x%08x)", k);
200 printf ("%cPC857TZPnn%s", pre, suf); /* only 857T tested right now! */
202 printf ("unknown MPC857 (0x%08x)", k);
205 printf (" at %s MHz:", strmhz (buf, clock));
207 printf (" %u kB I-Cache", checkicache () >> 10);
208 printf (" %u kB D-Cache", checkdcache () >> 10);
210 /* lets check and see if we're running on a 862T (or P?) */
212 immap->im_cpm.cp_fec.fec_addr_low = 0x12345678;
213 if (immap->im_cpm.cp_fec.fec_addr_low == 0x12345678) {
214 printf (" FEC present");
226 #elif defined(CONFIG_MPC823)
228 static int check_CPU (long clock, uint pvr, uint immr)
230 volatile immap_t *immap = (immap_t *) (immr & 0xFFFF0000);
235 /* the highest 16 bits should be 0x0050 for a 8xx */
237 if ((pvr >> 16) != 0x0050)
240 k = (immr << 16) | *((ushort *) & immap->im_cpm.cp_dparam[0xB0]);
245 case 0x20000000: suf = "0"; break;
246 case 0x20010000: suf = "0.1"; break;
247 case 0x20020000: suf = "Z2/3"; break;
248 case 0x20020001: suf = "Z3"; break;
249 case 0x21000000: suf = "A"; break;
250 case 0x21010000: suf = "B"; m = 1; break;
251 case 0x21010001: suf = "B2"; m = 1; break;
253 case 0x24010000: suf = NULL;
254 puts ("PPC823EZTnnB2");
259 printf ("unknown MPC823 (0x%08x)", k);
263 printf ("PPC823ZTnn%s", suf);
265 printf (" at %s MHz:", strmhz (buf, clock));
267 printf (" %u kB I-Cache", checkicache () >> 10);
268 printf (" %u kB D-Cache", checkdcache () >> 10);
270 /* lets check and see if we're running on a 860T (or P?) */
272 immap->im_cpm.cp_fec.fec_addr_low = 0x12345678;
273 if (immap->im_cpm.cp_fec.fec_addr_low == 0x12345678) {
274 puts (" FEC present");
286 #elif defined(CONFIG_MPC850)
288 static int check_CPU (long clock, uint pvr, uint immr)
290 volatile immap_t *immap = (immap_t *) (immr & 0xFFFF0000);
294 /* the highest 16 bits should be 0x0050 for a 8xx */
296 if ((pvr >> 16) != 0x0050)
299 k = (immr << 16) | *((ushort *) & immap->im_cpm.cp_dparam[0xB0]);
304 printf ("XPC850xxZT");
307 printf ("XPC850xxZTA");
310 printf ("XPC850xxZTB");
314 printf ("XPC850xxZTC");
318 printf ("unknown MPC850 (0x%08x)", k);
320 printf (" at %s MHz:", strmhz (buf, clock));
322 printf (" %u kB I-Cache", checkicache () >> 10);
323 printf (" %u kB D-Cache", checkdcache () >> 10);
325 /* lets check and see if we're running on a 850T (or P?) */
327 immap->im_cpm.cp_fec.fec_addr_low = 0x12345678;
328 if (immap->im_cpm.cp_fec.fec_addr_low == 0x12345678) {
329 printf (" FEC present");
343 /* ------------------------------------------------------------------------- */
347 DECLARE_GLOBAL_DATA_PTR;
349 ulong clock = gd->cpu_clk;
350 uint immr = get_immr (0); /* Return full IMMR contents */
351 uint pvr = get_pvr ();
355 /* 850 has PARTNUM 20 */
356 /* 801 has PARTNUM 10 */
357 return check_CPU (clock, pvr, immr);
360 /* ------------------------------------------------------------------------- */
362 /* the standard 860 has 128 sets of 16 bytes in 2 ways (= 4 kB) */
363 /* the 860 P (plus) has 256 sets of 16 bytes in 4 ways (= 16 kB) */
365 int checkicache (void)
367 volatile immap_t *immap = (immap_t *) CFG_IMMR;
368 volatile memctl8xx_t *memctl = &immap->im_memctl;
369 u32 cacheon = rd_ic_cst () & IDC_ENABLED;
372 u32 k = memctl->memc_br1 & ~0x00007fff; /* probe in flash memoryarea */
374 u32 k = memctl->memc_br0 & ~0x00007fff; /* probe in flash memoryarea */
379 wr_ic_cst (IDC_UNALL);
380 wr_ic_cst (IDC_INVALL);
381 wr_ic_cst (IDC_DISABLE);
382 __asm__ volatile ("isync");
384 while (!((m = rd_ic_cst ()) & IDC_CERR2)) {
386 wr_ic_cst (IDC_LDLCK);
387 __asm__ volatile ("isync");
390 k += 0x10; /* the number of bytes in a cacheline */
393 wr_ic_cst (IDC_UNALL);
394 wr_ic_cst (IDC_INVALL);
397 wr_ic_cst (IDC_ENABLE);
399 wr_ic_cst (IDC_DISABLE);
401 __asm__ volatile ("isync");
406 /* ------------------------------------------------------------------------- */
408 /* the standard 860 has 128 sets of 16 bytes in 2 ways (= 4 kB) */
409 /* the 860 P (plus) has 256 sets of 16 bytes in 2 ways (= 8 kB) */
410 /* call with cache disabled */
412 int checkdcache (void)
414 volatile immap_t *immap = (immap_t *) CFG_IMMR;
415 volatile memctl8xx_t *memctl = &immap->im_memctl;
416 u32 cacheon = rd_dc_cst () & IDC_ENABLED;
419 u32 k = memctl->memc_br1 & ~0x00007fff; /* probe in flash memoryarea */
421 u32 k = memctl->memc_br0 & ~0x00007fff; /* probe in flash memoryarea */
426 wr_dc_cst (IDC_UNALL);
427 wr_dc_cst (IDC_INVALL);
428 wr_dc_cst (IDC_DISABLE);
430 while (!((m = rd_dc_cst ()) & IDC_CERR2)) {
432 wr_dc_cst (IDC_LDLCK);
434 k += 0x10; /* the number of bytes in a cacheline */
437 wr_dc_cst (IDC_UNALL);
438 wr_dc_cst (IDC_INVALL);
441 wr_dc_cst (IDC_ENABLE);
443 wr_dc_cst (IDC_DISABLE);
448 /* ------------------------------------------------------------------------- */
450 void upmconfig (uint upm, uint * table, uint size)
454 volatile immap_t *immap = (immap_t *) CFG_IMMR;
455 volatile memctl8xx_t *memctl = &immap->im_memctl;
457 for (i = 0; i < size; i++) {
458 memctl->memc_mdr = table[i]; /* (16-15) */
459 memctl->memc_mcr = addr | upm; /* (16-16) */
464 /* ------------------------------------------------------------------------- */
468 int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
472 volatile immap_t *immap = (immap_t *) CFG_IMMR;
474 immap->im_clkrst.car_plprcr |= PLPRCR_CSR; /* Checkstop Reset enable */
476 /* Interrupts and MMU off */
477 __asm__ volatile ("mtspr 81, 0");
478 __asm__ volatile ("mfmsr %0":"=r" (msr));
481 __asm__ volatile ("mtmsr %0"::"r" (msr));
484 * Trying to execute the next instruction at a non-existing address
485 * should cause a machine check, resulting in reset
487 #ifdef CFG_RESET_ADDRESS
488 addr = CFG_RESET_ADDRESS;
491 * note: when CFG_MONITOR_BASE points to a RAM address, CFG_MONITOR_BASE
492 * - sizeof (ulong) is usually a valid address. Better pick an address
493 * known to be invalid on your system and assign it to CFG_RESET_ADDRESS.
494 * "(ulong)-1" used to be a good choice for many systems...
496 addr = CFG_MONITOR_BASE - sizeof (ulong);
498 ((void (*)(void)) addr) ();
502 #else /* CONFIG_LWMON */
505 * On the LWMON board, the MCLR reset input of the PIC's on the board
506 * uses a 47K/1n RC combination which has a 47us time constant. The
507 * low signal on the HRESET pin of the CPU is only 512 clocks = 8 us
508 * and thus too short to reset the external hardware. So we use the
509 * watchdog to reset the board.
511 int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
513 /* prevent triggering the watchdog */
514 disable_interrupts ();
516 /* make sure the watchdog is running */
517 reset_8xx_watchdog ((immap_t *) CFG_IMMR);
519 /* wait for watchdog reset */
526 #endif /* CONFIG_LWMON */
528 /* ------------------------------------------------------------------------- */
531 * Get timebase clock frequency (like cpu_clk in Hz)
533 * See sections 14.2 and 14.6 of the User's Manual
535 unsigned long get_tbclk (void)
537 DECLARE_GLOBAL_DATA_PTR;
539 uint immr = get_immr (0); /* Return full IMMR contents */
540 volatile immap_t *immap = (volatile immap_t *)(immr & 0xFFFF0000);
541 ulong oscclk, factor, pll;
543 if (immap->im_clkrst.car_sccr & SCCR_TBS) {
544 return (gd->cpu_clk / 16);
547 pll = immap->im_clkrst.car_plprcr;
549 #define PLPRCR_val(a) ((pll & PLPRCR_ ## a ## _MSK) >> PLPRCR_ ## a ## _SHIFT)
552 * For newer PQ1 chips (MPC866/87x/88x families), PLL multiplication
553 * factor is calculated as follows:
558 * factor = -----------------
561 * For older chips, it's just MF field of PLPRCR plus one.
563 if ((immr & 0x0FFF) >= MPC8xx_NEW_CLK) { /* MPC866/87x/88x series */
564 factor = (PLPRCR_val(MFI) + PLPRCR_val(MFN)/(PLPRCR_val(MFD)+1))/
565 (PLPRCR_val(PDF)+1) / (1<<PLPRCR_val(S));
567 factor = PLPRCR_val(MF)+1;
570 oscclk = gd->cpu_clk / factor;
572 if ((immap->im_clkrst.car_sccr & SCCR_RTSEL) == 0 || factor > 2) {
575 return (oscclk / 16);
578 /* ------------------------------------------------------------------------- */
580 #if defined(CONFIG_WATCHDOG)
581 void watchdog_reset (void)
583 int re_enable = disable_interrupts ();
585 reset_8xx_watchdog ((immap_t *) CFG_IMMR);
587 enable_interrupts ();
589 #endif /* CONFIG_WATCHDOG */
591 #if defined(CONFIG_WATCHDOG) || defined(CONFIG_LWMON)
593 void reset_8xx_watchdog (volatile immap_t * immr)
595 # if defined(CONFIG_LWMON)
597 * The LWMON board uses a MAX6301 Watchdog
598 * with the trigger pin connected to port PA.7
600 * (The old board version used a MAX706TESA Watchdog, which
601 * had to be handled exactly the same.)
603 # define WATCHDOG_BIT 0x0100
604 immr->im_ioport.iop_papar &= ~(WATCHDOG_BIT); /* GPIO */
605 immr->im_ioport.iop_padir |= WATCHDOG_BIT; /* Output */
606 immr->im_ioport.iop_paodr &= ~(WATCHDOG_BIT); /* active output */
608 immr->im_ioport.iop_padat ^= WATCHDOG_BIT; /* Toggle WDI */
609 # elif defined(CONFIG_KUP4K) || defined(CONFIG_KUP4X)
611 * The KUP4 boards uses a TPS3705 Watchdog
612 * with the trigger pin connected to port PA.5
614 # define WATCHDOG_BIT 0x0400
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 */
622 * All other boards use the MPC8xx Internal Watchdog
624 immr->im_siu_conf.sc_swsr = 0x556c; /* write magic1 */
625 immr->im_siu_conf.sc_swsr = 0xaa39; /* write magic2 */
626 # endif /* CONFIG_LWMON */
629 #endif /* CONFIG_WATCHDOG */
631 /* ------------------------------------------------------------------------- */