2 * (C) Copyright 2000-2006
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,
25 * CPU specific code for the MPC825x / MPC826x / MPC827x / MPC828x
27 * written or collected and sometimes rewritten by
28 * Magnus Damm <damm@bitsmart.com>
31 * Wolfgang Denk <wd@denx.de>
33 * modified for 8260 by
34 * Murray Jensen <Murray.Jensen@cmst.csiro.au>
37 * Marius Groeger <mag@sysgo.de>
39 * added HiP7 (824x/827x/8280) processors support by
40 * Yuli Barcohen <yuli@arabellasw.com>
47 #include <asm/processor.h>
48 #include <asm/cpm_8260.h>
50 DECLARE_GLOBAL_DATA_PTR;
52 #if defined(CONFIG_GET_CPU_STR_F)
53 extern int get_cpu_str_f (char *buf);
58 volatile immap_t *immap = (immap_t *) CFG_IMMR;
59 ulong clock = gd->cpu_clk;
60 uint pvr = get_pvr ();
80 return -1; /* whoops! not an MPC8260 */
84 immr = immap->im_memctl.memc_immr;
85 if ((immr & IMMR_ISB_MSK) != CFG_IMMR)
86 return -1; /* whoops! someone moved the IMMR */
88 #if defined(CONFIG_GET_CPU_STR_F)
90 printf ("%s (HiP%d Rev %02x, Mask ", buf, k, rev);
92 printf (CPU_ID_STR " (HiP%d Rev %02x, Mask ", k, rev);
96 * the bottom 16 bits of the immr are the Part Number and Mask Number
97 * (4-34); the 16 bits at PROFF_REVNUM (0x8af0) in dual port ram is the
98 * RISC Microcode Revision Number (13-10).
99 * For the 8260, Motorola doesn't include the Microcode Revision
102 m = immr & (IMMR_PARTNUM_MSK | IMMR_MASKNUM_MSK);
103 k = *((ushort *) & immap->im_dprambase[PROFF_REVNUM]);
113 puts ("A.1 1K22A-XC");
119 puts ("B.2 2K23A-XC");
128 puts ("A.0(A) 2K25A");
158 printf ("unknown [immr=0x%04x,k=0x%04x]", m, k);
162 printf (") at %s MHz\n", strmhz (buf, clock));
167 /* ------------------------------------------------------------------------- */
168 /* configures a UPM by writing into the UPM RAM array */
169 /* uses bank 11 and a dummy physical address (=BRx_BA_MSK) */
170 /* NOTE: the physical address chosen must not overlap into any other area */
171 /* mapped by the memory controller because bank 11 has the lowest priority */
173 void upmconfig (uint upm, uint * table, uint size)
175 volatile immap_t *immap = (immap_t *) CFG_IMMR;
176 volatile memctl8260_t *memctl = &immap->im_memctl;
177 volatile uchar *dummy = (uchar *) BRx_BA_MSK; /* set all BA bits */
180 /* first set up bank 11 to reference the correct UPM at a dummy address */
182 memctl->memc_or11 = ORxU_AM_MSK; /* set all AM bits */
188 ((uint)dummy & BRx_BA_MSK) | BRx_PS_32 | BRx_MS_UPMA |
190 memctl->memc_mamr = MxMR_OP_WARR;
195 ((uint)dummy & BRx_BA_MSK) | BRx_PS_32 | BRx_MS_UPMB |
197 memctl->memc_mbmr = MxMR_OP_WARR;
202 ((uint)dummy & BRx_BA_MSK) | BRx_PS_32 | BRx_MS_UPMC |
204 memctl->memc_mcmr = MxMR_OP_WARR;
208 panic ("upmconfig passed invalid UPM number (%u)\n", upm);
214 * at this point, the dummy address is set up to access the selected UPM,
215 * the MAD pointer is zero, and the MxMR OP is set for writing to RAM
217 * now we simply load the mdr with each word and poke the dummy address.
218 * the MAD is incremented on each access.
221 for (i = 0; i < size; i++) {
222 memctl->memc_mdr = table[i];
226 /* now kill bank 11 */
227 memctl->memc_br11 = 0;
230 /* ------------------------------------------------------------------------- */
232 #if !defined(CONFIG_HAVE_OWN_RESET)
234 do_reset (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
238 volatile immap_t *immap = (immap_t *) CFG_IMMR;
240 immap->im_clkrst.car_rmr = RMR_CSRE; /* Checkstop Reset enable */
242 /* Interrupts and MMU off */
243 __asm__ __volatile__ ("mfmsr %0":"=r" (msr):);
245 msr &= ~(MSR_ME | MSR_EE | MSR_IR | MSR_DR);
246 __asm__ __volatile__ ("mtmsr %0"::"r" (msr));
249 * Trying to execute the next instruction at a non-existing address
250 * should cause a machine check, resulting in reset
252 #ifdef CFG_RESET_ADDRESS
253 addr = CFG_RESET_ADDRESS;
256 * note: when CFG_MONITOR_BASE points to a RAM address, CFG_MONITOR_BASE
257 * - sizeof (ulong) is usually a valid address. Better pick an address
258 * known to be invalid on your system and assign it to CFG_RESET_ADDRESS.
260 addr = CFG_MONITOR_BASE - sizeof (ulong);
262 ((void (*)(void)) addr) ();
266 #endif /* CONFIG_HAVE_OWN_RESET */
268 /* ------------------------------------------------------------------------- */
271 * Get timebase clock frequency (like cpu_clk in Hz)
274 unsigned long get_tbclk (void)
278 tbclk = (gd->bus_clk + 3L) / 4L;
283 /* ------------------------------------------------------------------------- */
285 #if defined(CONFIG_WATCHDOG)
286 void watchdog_reset (void)
288 int re_enable = disable_interrupts ();
290 reset_8260_watchdog ((immap_t *) CFG_IMMR);
292 enable_interrupts ();
294 #endif /* CONFIG_WATCHDOG */
296 /* ------------------------------------------------------------------------- */