2 * (C) Copyright 2000-2002
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * SPDX-License-Identifier: GPL-2.0+
13 * written or collected and sometimes rewritten by
14 * Magnus Damm <damm@bitsmart.com>
16 * minor modifications by
17 * Wolfgang Denk <wd@denx.de>
26 #include <asm/cache.h>
27 #include <linux/compiler.h>
30 #if defined(CONFIG_OF_LIBFDT)
32 #include <fdt_support.h>
35 DECLARE_GLOBAL_DATA_PTR;
37 static char *cpu_warning = "\n " \
38 "*** Warning: CPU Core has Silicon Bugs -- Check the Errata ***";
40 #if ((defined(CONFIG_MPC86x) || defined(CONFIG_MPC855)) && \
41 !defined(CONFIG_MPC862))
43 static int check_CPU (long clock, uint pvr, uint immr)
46 # if defined(CONFIG_MPC855)
48 # elif defined(CONFIG_MPC860P)
53 volatile immap_t *immap = (immap_t *) (immr & 0xFFFF0000);
60 /* the highest 16 bits should be 0x0050 for a 860 */
62 if ((pvr >> 16) != 0x0050)
66 immap->im_cpm.cp_dparam16[PROFF_REVNUM / sizeof(u16)];
71 * Some boards use sockets so different CPUs can be used.
72 * We have to check chip version in run time.
75 case 0x00020001: pre = 'P'; break;
76 case 0x00030001: break;
77 case 0x00120003: suf = "A"; break;
78 case 0x00130003: suf = "A3"; break;
80 case 0x00200004: suf = "B"; break;
82 case 0x00300004: suf = "C"; break;
83 case 0x00310004: suf = "C1"; m = 1; break;
85 case 0x00200064: mid = "SR"; suf = "B"; break;
86 case 0x00300065: mid = "SR"; suf = "C"; break;
87 case 0x00310065: mid = "SR"; suf = "C1"; m = 1; break;
88 case 0x05010000: suf = "D3"; m = 1; break;
89 case 0x05020000: suf = "D4"; m = 1; break;
90 /* this value is not documented anywhere */
91 case 0x40000000: pre = 'P'; suf = "D"; m = 1; break;
92 /* MPC866P/MPC866T/MPC859T/MPC859DSL/MPC852T */
93 case 0x08010004: /* Rev. A.0 */
96 case 0x08000003: /* Rev. 0.3 */
100 # if defined(CONFIG_MPC852T)
102 # elif defined(CONFIG_MPC859T)
104 # elif defined(CONFIG_MPC859DSL)
106 # elif defined(CONFIG_MPC866T)
109 "PC866x"; /* Unknown chip from MPC866 family */
112 case 0x09000000: pre = 'M'; mid = suf = ""; m = 1;
114 id_str = "PC885"; /* 870/875/880/885 */
117 default: suf = NULL; break;
121 id_str = "PC86x"; /* Unknown 86x chip */
123 printf ("%c%s%sZPnn%s", pre, id_str, mid, suf);
125 printf ("unknown M%s (0x%08x)", id_str, k);
128 #if defined(CONFIG_SYS_8xx_CPUCLK_MIN) && defined(CONFIG_SYS_8xx_CPUCLK_MAX)
129 printf (" at %s MHz [%d.%d...%d.%d MHz]\n ",
131 CONFIG_SYS_8xx_CPUCLK_MIN / 1000000,
132 ((CONFIG_SYS_8xx_CPUCLK_MIN % 1000000) + 50000) / 100000,
133 CONFIG_SYS_8xx_CPUCLK_MAX / 1000000,
134 ((CONFIG_SYS_8xx_CPUCLK_MAX % 1000000) + 50000) / 100000
137 printf (" at %s MHz: ", strmhz (buf, clock));
139 print_size(checkicache(), " I-Cache ");
140 print_size(checkdcache(), " D-Cache");
142 /* do we have a FEC (860T/P or 852/859/866/885)? */
144 immap->im_cpm.cp_fec.fec_addr_low = 0x12345678;
145 if (immap->im_cpm.cp_fec.fec_addr_low == 0x12345678) {
146 printf (" FEC present");
156 if(clock != measure_gclk()) {
157 printf ("clock %ldHz != %dHz\n", clock, measure_gclk());
164 #elif defined(CONFIG_MPC862)
166 static int check_CPU (long clock, uint pvr, uint immr)
168 volatile immap_t *immap = (immap_t *) (immr & 0xFFFF0000);
172 __maybe_unused char *mid = "xx";
175 /* the highest 16 bits should be 0x0050 for a 8xx */
177 if ((pvr >> 16) != 0x0050)
181 immap->im_cpm.cp_dparam16[PROFF_REVNUM / sizeof(u16)];
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 print_size(checkicache(), " I-Cache ");
208 print_size(checkdcache(), " D-Cache");
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)
241 in_be16(&immap->im_cpm.cp_dparam16[PROFF_REVNUM / sizeof(u16)]);
246 case 0x20000000: suf = "0"; break;
247 case 0x20010000: suf = "0.1"; break;
248 case 0x20020000: suf = "Z2/3"; break;
249 case 0x20020001: suf = "Z3"; break;
250 case 0x21000000: suf = "A"; break;
251 case 0x21010000: suf = "B"; m = 1; break;
252 case 0x21010001: suf = "B2"; m = 1; break;
254 case 0x24010000: suf = NULL;
255 puts ("PPC823EZTnnB2");
260 printf ("unknown MPC823 (0x%08x)", k);
264 printf ("PPC823ZTnn%s", suf);
266 printf (" at %s MHz: ", strmhz (buf, clock));
268 print_size(checkicache(), " I-Cache ");
269 print_size(checkdcache(), " D-Cache");
271 /* lets check and see if we're running on a 860T (or P?) */
273 immap->im_cpm.cp_fec.fec_addr_low = 0x12345678;
274 if (immap->im_cpm.cp_fec.fec_addr_low == 0x12345678) {
275 puts (" FEC present");
287 #elif defined(CONFIG_MPC850)
289 static int check_CPU (long clock, uint pvr, uint immr)
291 volatile immap_t *immap = (immap_t *) (immr & 0xFFFF0000);
295 /* the highest 16 bits should be 0x0050 for a 8xx */
297 if ((pvr >> 16) != 0x0050)
301 immap->im_cpm.cp_dparam16[PROFF_REVNUM / sizeof(u16)];
306 printf ("XPC850xxZT");
309 printf ("XPC850xxZTA");
312 printf ("XPC850xxZTB");
316 printf ("XPC850xxZTC");
320 printf ("unknown MPC850 (0x%08x)", k);
322 printf (" at %s MHz: ", strmhz (buf, clock));
324 print_size(checkicache(), " I-Cache ");
325 print_size(checkdcache(), " D-Cache");
327 /* lets check and see if we're running on a 850T (or P?) */
329 immap->im_cpm.cp_fec.fec_addr_low = 0x12345678;
330 if (immap->im_cpm.cp_fec.fec_addr_low == 0x12345678) {
331 printf (" FEC present");
345 /* ------------------------------------------------------------------------- */
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 *) CONFIG_SYS_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 *) CONFIG_SYS_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 *) CONFIG_SYS_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 * const argv[])
472 volatile immap_t *immap = (immap_t *) CONFIG_SYS_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 CONFIG_SYS_RESET_ADDRESS
488 addr = CONFIG_SYS_RESET_ADDRESS;
491 * note: when CONFIG_SYS_MONITOR_BASE points to a RAM address, CONFIG_SYS_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 CONFIG_SYS_RESET_ADDRESS.
494 * "(ulong)-1" used to be a good choice for many systems...
496 addr = CONFIG_SYS_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 * const argv[])
513 /* prevent triggering the watchdog */
514 disable_interrupts ();
516 /* make sure the watchdog is running */
517 reset_8xx_watchdog ((immap_t *) CONFIG_SYS_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 uint immr = get_immr (0); /* Return full IMMR contents */
538 volatile immap_t *immap = (volatile immap_t *)(immr & 0xFFFF0000);
539 ulong oscclk, factor, pll;
541 if (immap->im_clkrst.car_sccr & SCCR_TBS) {
542 return (gd->cpu_clk / 16);
545 pll = immap->im_clkrst.car_plprcr;
547 #define PLPRCR_val(a) ((pll & PLPRCR_ ## a ## _MSK) >> PLPRCR_ ## a ## _SHIFT)
550 * For newer PQ1 chips (MPC866/87x/88x families), PLL multiplication
551 * factor is calculated as follows:
556 * factor = -----------------
559 * For older chips, it's just MF field of PLPRCR plus one.
561 if ((immr & 0x0FFF) >= MPC8xx_NEW_CLK) { /* MPC866/87x/88x series */
562 factor = (PLPRCR_val(MFI) + PLPRCR_val(MFN)/(PLPRCR_val(MFD)+1))/
563 (PLPRCR_val(PDF)+1) / (1<<PLPRCR_val(S));
565 factor = PLPRCR_val(MF)+1;
568 oscclk = gd->cpu_clk / factor;
570 if ((immap->im_clkrst.car_sccr & SCCR_RTSEL) == 0 || factor > 2) {
573 return (oscclk / 16);
576 /* ------------------------------------------------------------------------- */
578 #if defined(CONFIG_WATCHDOG)
579 void watchdog_reset (void)
581 int re_enable = disable_interrupts ();
583 reset_8xx_watchdog ((immap_t *) CONFIG_SYS_IMMR);
585 enable_interrupts ();
587 #endif /* CONFIG_WATCHDOG */
589 #if defined(CONFIG_WATCHDOG) || defined(CONFIG_LWMON)
591 void reset_8xx_watchdog (volatile immap_t * immr)
593 # if defined(CONFIG_LWMON)
595 * The LWMON board uses a MAX6301 Watchdog
596 * with the trigger pin connected to port PA.7
598 * (The old board version used a MAX706TESA Watchdog, which
599 * had to be handled exactly the same.)
601 # define WATCHDOG_BIT 0x0100
602 immr->im_ioport.iop_papar &= ~(WATCHDOG_BIT); /* GPIO */
603 immr->im_ioport.iop_padir |= WATCHDOG_BIT; /* Output */
604 immr->im_ioport.iop_paodr &= ~(WATCHDOG_BIT); /* active output */
606 immr->im_ioport.iop_padat ^= WATCHDOG_BIT; /* Toggle WDI */
607 # elif defined(CONFIG_KUP4K) || defined(CONFIG_KUP4X)
609 * The KUP4 boards uses a TPS3705 Watchdog
610 * with the trigger pin connected to port PA.5
612 # define WATCHDOG_BIT 0x0400
613 immr->im_ioport.iop_papar &= ~(WATCHDOG_BIT); /* GPIO */
614 immr->im_ioport.iop_padir |= WATCHDOG_BIT; /* Output */
615 immr->im_ioport.iop_paodr &= ~(WATCHDOG_BIT); /* active output */
617 immr->im_ioport.iop_padat ^= WATCHDOG_BIT; /* Toggle WDI */
620 * All other boards use the MPC8xx Internal Watchdog
622 immr->im_siu_conf.sc_swsr = 0x556c; /* write magic1 */
623 immr->im_siu_conf.sc_swsr = 0xaa39; /* write magic2 */
624 # endif /* CONFIG_LWMON */
626 #endif /* CONFIG_WATCHDOG */
629 * Initializes on-chip ethernet controllers.
630 * to override, implement board_eth_init()
632 int cpu_eth_init(bd_t *bis)
634 #if defined(SCC_ENET) && defined(CONFIG_CMD_NET)
637 #if defined(FEC_ENET)