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 printf ("%u kB I-Cache %u kB D-Cache",
140 checkicache () >> 10,
144 /* do we have a FEC (860T/P or 852/859/866/885)? */
146 immap->im_cpm.cp_fec.fec_addr_low = 0x12345678;
147 if (immap->im_cpm.cp_fec.fec_addr_low == 0x12345678) {
148 printf (" FEC present");
158 if(clock != measure_gclk()) {
159 printf ("clock %ldHz != %dHz\n", clock, measure_gclk());
166 #elif defined(CONFIG_MPC862)
168 static int check_CPU (long clock, uint pvr, uint immr)
170 volatile immap_t *immap = (immap_t *) (immr & 0xFFFF0000);
174 __maybe_unused char *mid = "xx";
177 /* the highest 16 bits should be 0x0050 for a 8xx */
179 if ((pvr >> 16) != 0x0050)
183 immap->im_cpm.cp_dparam16[PROFF_REVNUM / sizeof(u16)];
188 /* this value is not documented anywhere */
189 case 0x06000000: mid = "P"; suf = "0"; break;
190 case 0x06010001: mid = "P"; suf = "A"; m = 1; break;
191 case 0x07000003: mid = "P"; suf = "B"; m = 1; break;
192 default: suf = NULL; break;
195 #ifndef CONFIG_MPC857
197 printf ("%cPC862%sZPnn%s", pre, mid, suf);
199 printf ("unknown MPC862 (0x%08x)", k);
202 printf ("%cPC857TZPnn%s", pre, suf); /* only 857T tested right now! */
204 printf ("unknown MPC857 (0x%08x)", k);
207 printf (" at %s MHz:", strmhz (buf, clock));
209 printf (" %u kB I-Cache", checkicache () >> 10);
210 printf (" %u kB D-Cache", checkdcache () >> 10);
212 /* lets check and see if we're running on a 862T (or P?) */
214 immap->im_cpm.cp_fec.fec_addr_low = 0x12345678;
215 if (immap->im_cpm.cp_fec.fec_addr_low == 0x12345678) {
216 printf (" FEC present");
228 #elif defined(CONFIG_MPC823)
230 static int check_CPU (long clock, uint pvr, uint immr)
232 volatile immap_t *immap = (immap_t *) (immr & 0xFFFF0000);
237 /* the highest 16 bits should be 0x0050 for a 8xx */
239 if ((pvr >> 16) != 0x0050)
243 in_be16(&immap->im_cpm.cp_dparam16[PROFF_REVNUM / sizeof(u16)]);
248 case 0x20000000: suf = "0"; break;
249 case 0x20010000: suf = "0.1"; break;
250 case 0x20020000: suf = "Z2/3"; break;
251 case 0x20020001: suf = "Z3"; break;
252 case 0x21000000: suf = "A"; break;
253 case 0x21010000: suf = "B"; m = 1; break;
254 case 0x21010001: suf = "B2"; m = 1; break;
256 case 0x24010000: suf = NULL;
257 puts ("PPC823EZTnnB2");
262 printf ("unknown MPC823 (0x%08x)", k);
266 printf ("PPC823ZTnn%s", suf);
268 printf (" at %s MHz:", strmhz (buf, clock));
270 printf (" %u kB I-Cache", checkicache () >> 10);
271 printf (" %u kB D-Cache", checkdcache () >> 10);
273 /* lets check and see if we're running on a 860T (or P?) */
275 immap->im_cpm.cp_fec.fec_addr_low = 0x12345678;
276 if (immap->im_cpm.cp_fec.fec_addr_low == 0x12345678) {
277 puts (" FEC present");
289 #elif defined(CONFIG_MPC850)
291 static int check_CPU (long clock, uint pvr, uint immr)
293 volatile immap_t *immap = (immap_t *) (immr & 0xFFFF0000);
297 /* the highest 16 bits should be 0x0050 for a 8xx */
299 if ((pvr >> 16) != 0x0050)
303 immap->im_cpm.cp_dparam16[PROFF_REVNUM / sizeof(u16)];
308 printf ("XPC850xxZT");
311 printf ("XPC850xxZTA");
314 printf ("XPC850xxZTB");
318 printf ("XPC850xxZTC");
322 printf ("unknown MPC850 (0x%08x)", k);
324 printf (" at %s MHz:", strmhz (buf, clock));
326 printf (" %u kB I-Cache", checkicache () >> 10);
327 printf (" %u kB D-Cache", checkdcache () >> 10);
329 /* lets check and see if we're running on a 850T (or P?) */
331 immap->im_cpm.cp_fec.fec_addr_low = 0x12345678;
332 if (immap->im_cpm.cp_fec.fec_addr_low == 0x12345678) {
333 printf (" FEC present");
347 /* ------------------------------------------------------------------------- */
351 ulong clock = gd->cpu_clk;
352 uint immr = get_immr (0); /* Return full IMMR contents */
353 uint pvr = get_pvr ();
357 /* 850 has PARTNUM 20 */
358 /* 801 has PARTNUM 10 */
359 return check_CPU (clock, pvr, immr);
362 /* ------------------------------------------------------------------------- */
364 /* the standard 860 has 128 sets of 16 bytes in 2 ways (= 4 kB) */
365 /* the 860 P (plus) has 256 sets of 16 bytes in 4 ways (= 16 kB) */
367 int checkicache (void)
369 volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
370 volatile memctl8xx_t *memctl = &immap->im_memctl;
371 u32 cacheon = rd_ic_cst () & IDC_ENABLED;
374 u32 k = memctl->memc_br1 & ~0x00007fff; /* probe in flash memoryarea */
376 u32 k = memctl->memc_br0 & ~0x00007fff; /* probe in flash memoryarea */
381 wr_ic_cst (IDC_UNALL);
382 wr_ic_cst (IDC_INVALL);
383 wr_ic_cst (IDC_DISABLE);
384 __asm__ volatile ("isync");
386 while (!((m = rd_ic_cst ()) & IDC_CERR2)) {
388 wr_ic_cst (IDC_LDLCK);
389 __asm__ volatile ("isync");
392 k += 0x10; /* the number of bytes in a cacheline */
395 wr_ic_cst (IDC_UNALL);
396 wr_ic_cst (IDC_INVALL);
399 wr_ic_cst (IDC_ENABLE);
401 wr_ic_cst (IDC_DISABLE);
403 __asm__ volatile ("isync");
408 /* ------------------------------------------------------------------------- */
410 /* the standard 860 has 128 sets of 16 bytes in 2 ways (= 4 kB) */
411 /* the 860 P (plus) has 256 sets of 16 bytes in 2 ways (= 8 kB) */
412 /* call with cache disabled */
414 int checkdcache (void)
416 volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
417 volatile memctl8xx_t *memctl = &immap->im_memctl;
418 u32 cacheon = rd_dc_cst () & IDC_ENABLED;
421 u32 k = memctl->memc_br1 & ~0x00007fff; /* probe in flash memoryarea */
423 u32 k = memctl->memc_br0 & ~0x00007fff; /* probe in flash memoryarea */
428 wr_dc_cst (IDC_UNALL);
429 wr_dc_cst (IDC_INVALL);
430 wr_dc_cst (IDC_DISABLE);
432 while (!((m = rd_dc_cst ()) & IDC_CERR2)) {
434 wr_dc_cst (IDC_LDLCK);
436 k += 0x10; /* the number of bytes in a cacheline */
439 wr_dc_cst (IDC_UNALL);
440 wr_dc_cst (IDC_INVALL);
443 wr_dc_cst (IDC_ENABLE);
445 wr_dc_cst (IDC_DISABLE);
450 /* ------------------------------------------------------------------------- */
452 void upmconfig (uint upm, uint * table, uint size)
456 volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
457 volatile memctl8xx_t *memctl = &immap->im_memctl;
459 for (i = 0; i < size; i++) {
460 memctl->memc_mdr = table[i]; /* (16-15) */
461 memctl->memc_mcr = addr | upm; /* (16-16) */
466 /* ------------------------------------------------------------------------- */
470 int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
474 volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
476 immap->im_clkrst.car_plprcr |= PLPRCR_CSR; /* Checkstop Reset enable */
478 /* Interrupts and MMU off */
479 __asm__ volatile ("mtspr 81, 0");
480 __asm__ volatile ("mfmsr %0":"=r" (msr));
483 __asm__ volatile ("mtmsr %0"::"r" (msr));
486 * Trying to execute the next instruction at a non-existing address
487 * should cause a machine check, resulting in reset
489 #ifdef CONFIG_SYS_RESET_ADDRESS
490 addr = CONFIG_SYS_RESET_ADDRESS;
493 * note: when CONFIG_SYS_MONITOR_BASE points to a RAM address, CONFIG_SYS_MONITOR_BASE
494 * - sizeof (ulong) is usually a valid address. Better pick an address
495 * known to be invalid on your system and assign it to CONFIG_SYS_RESET_ADDRESS.
496 * "(ulong)-1" used to be a good choice for many systems...
498 addr = CONFIG_SYS_MONITOR_BASE - sizeof (ulong);
500 ((void (*)(void)) addr) ();
504 #else /* CONFIG_LWMON */
507 * On the LWMON board, the MCLR reset input of the PIC's on the board
508 * uses a 47K/1n RC combination which has a 47us time constant. The
509 * low signal on the HRESET pin of the CPU is only 512 clocks = 8 us
510 * and thus too short to reset the external hardware. So we use the
511 * watchdog to reset the board.
513 int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
515 /* prevent triggering the watchdog */
516 disable_interrupts ();
518 /* make sure the watchdog is running */
519 reset_8xx_watchdog ((immap_t *) CONFIG_SYS_IMMR);
521 /* wait for watchdog reset */
528 #endif /* CONFIG_LWMON */
530 /* ------------------------------------------------------------------------- */
533 * Get timebase clock frequency (like cpu_clk in Hz)
535 * See sections 14.2 and 14.6 of the User's Manual
537 unsigned long get_tbclk (void)
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 *) CONFIG_SYS_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 */
628 #endif /* CONFIG_WATCHDOG */
631 * Initializes on-chip ethernet controllers.
632 * to override, implement board_eth_init()
634 int cpu_eth_init(bd_t *bis)
636 #if defined(SCC_ENET) && defined(CONFIG_CMD_NET)
639 #if defined(FEC_ENET)