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,
26 #include <asm/cpm_8260.h>
29 DECLARE_GLOBAL_DATA_PTR;
31 #if defined(CONFIG_BOARD_GET_CPU_CLK_F)
32 extern unsigned long board_get_cpu_clk_f (void);
35 static void config_8260_ioports (volatile immap_t * immr)
39 for (portnum = 0; portnum < 4; portnum++) {
46 iop_conf_t *iopc = (iop_conf_t *) & iop_conf_tab[portnum][0];
47 iop_conf_t *eiopc = iopc + 32;
52 * index 0 refers to pin 31,
53 * index 31 refers to pin 0
55 while (iopc < eiopc) {
75 volatile ioport_t *iop = ioport_addr (immr, portnum);
79 * the (somewhat confused) paragraph at the
80 * bottom of page 35-5 warns that there might
81 * be "unknown behaviour" when programming
82 * PSORx and PDIRx, if PPARx = 1, so I
83 * decided this meant I had to disable the
84 * dedicated function first, and enable it
88 iop->psor = (iop->psor & tpmsk) | psor;
89 iop->podr = (iop->podr & tpmsk) | podr;
90 iop->pdat = (iop->pdat & tpmsk) | pdat;
91 iop->pdir = (iop->pdir & tpmsk) | pdir;
97 #define SET_VAL_MASK(a, b, mask) ((a & mask) | (b & ~mask))
99 * Breath some life into the CPU...
101 * Set up the memory map,
102 * initialize a bunch of registers,
103 * initialize the UPM's
105 void cpu_init_f (volatile immap_t * immr)
107 #if !defined(CONFIG_COGENT) /* done in start.S for the cogent */
110 #if defined(CONFIG_BOARD_GET_CPU_CLK_F)
111 unsigned long cpu_clk;
113 volatile memctl8260_t *memctl = &immr->im_memctl;
114 extern void m8260_cpm_reset (void);
116 /* Pointer is writable since we allocated a register for it */
117 gd = (gd_t *) (CFG_INIT_RAM_ADDR + CFG_GBL_DATA_OFFSET);
119 /* Clear initial global data */
120 memset ((void *) gd, 0, sizeof (gd_t));
122 /* RSR - Reset Status Register - clear all status (5-4) */
123 gd->reset_status = immr->im_clkrst.car_rsr;
124 immr->im_clkrst.car_rsr = RSR_ALLBITS;
126 /* RMR - Reset Mode Register - contains checkstop reset enable (5-5) */
127 immr->im_clkrst.car_rmr = CFG_RMR;
129 /* BCR - Bus Configuration Register (4-25) */
130 #if defined(CFG_BCR_60x) && (CFG_BCR_SINGLE)
131 if (immr->im_siu_conf.sc_bcr & BCR_EBM) {
132 immr->im_siu_conf.sc_bcr = CFG_BCR_60x;
134 immr->im_siu_conf.sc_bcr = CFG_BCR_SINGLE;
137 immr->im_siu_conf.sc_bcr = CFG_BCR;
140 /* SIUMCR - contains debug pin configuration (4-31) */
141 #if defined(CFG_SIUMCR_LOW) && (CFG_SIUMCR_HIGH)
142 cpu_clk = board_get_cpu_clk_f ();
143 if (cpu_clk >= 100000000) {
144 immr->im_siu_conf.sc_siumcr = CFG_SIUMCR_HIGH;
146 immr->im_siu_conf.sc_siumcr = CFG_SIUMCR_LOW;
149 immr->im_siu_conf.sc_siumcr = CFG_SIUMCR;
152 config_8260_ioports (immr);
154 /* initialize time counter status and control register (4-40) */
155 immr->im_sit.sit_tmcntsc = CFG_TMCNTSC;
157 /* initialize the PIT (4-42) */
158 immr->im_sit.sit_piscr = CFG_PISCR;
160 #if !defined(CONFIG_COGENT) /* done in start.S for the cogent */
161 /* System clock control register (9-8) */
162 sccr = immr->im_clkrst.car_sccr &
163 (SCCR_PCI_MODE | SCCR_PCI_MODCK | SCCR_PCIDF_MSK);
164 immr->im_clkrst.car_sccr = sccr |
165 (CFG_SCCR & ~(SCCR_PCI_MODE | SCCR_PCI_MODCK | SCCR_PCIDF_MSK) );
166 #endif /* !CONFIG_COGENT */
172 /* Map banks 0 and 1 to the FLASH banks 0 and 1 at preliminary
173 * addresses - these have to be modified later when FLASH size
174 * has been determined
177 #if defined(CFG_OR0_REMAP)
178 memctl->memc_or0 = CFG_OR0_REMAP;
180 #if defined(CFG_OR1_REMAP)
181 memctl->memc_or1 = CFG_OR1_REMAP;
184 /* now restrict to preliminary range */
185 /* the PS came from the HRCW, donĀ“t change it */
186 memctl->memc_br0 = SET_VAL_MASK(memctl->memc_br0 , CFG_BR0_PRELIM, BRx_PS_MSK);
187 memctl->memc_or0 = CFG_OR0_PRELIM;
189 #if defined(CFG_BR1_PRELIM) && defined(CFG_OR1_PRELIM)
190 memctl->memc_or1 = CFG_OR1_PRELIM;
191 memctl->memc_br1 = CFG_BR1_PRELIM;
194 #if defined(CFG_BR2_PRELIM) && defined(CFG_OR2_PRELIM)
195 memctl->memc_or2 = CFG_OR2_PRELIM;
196 memctl->memc_br2 = CFG_BR2_PRELIM;
199 #if defined(CFG_BR3_PRELIM) && defined(CFG_OR3_PRELIM)
200 memctl->memc_or3 = CFG_OR3_PRELIM;
201 memctl->memc_br3 = CFG_BR3_PRELIM;
204 #if defined(CFG_BR4_PRELIM) && defined(CFG_OR4_PRELIM)
205 memctl->memc_or4 = CFG_OR4_PRELIM;
206 memctl->memc_br4 = CFG_BR4_PRELIM;
209 #if defined(CFG_BR5_PRELIM) && defined(CFG_OR5_PRELIM)
210 memctl->memc_or5 = CFG_OR5_PRELIM;
211 memctl->memc_br5 = CFG_BR5_PRELIM;
214 #if defined(CFG_BR6_PRELIM) && defined(CFG_OR6_PRELIM)
215 memctl->memc_or6 = CFG_OR6_PRELIM;
216 memctl->memc_br6 = CFG_BR6_PRELIM;
219 #if defined(CFG_BR7_PRELIM) && defined(CFG_OR7_PRELIM)
220 memctl->memc_or7 = CFG_OR7_PRELIM;
221 memctl->memc_br7 = CFG_BR7_PRELIM;
224 #if defined(CFG_BR8_PRELIM) && defined(CFG_OR8_PRELIM)
225 memctl->memc_or8 = CFG_OR8_PRELIM;
226 memctl->memc_br8 = CFG_BR8_PRELIM;
229 #if defined(CFG_BR9_PRELIM) && defined(CFG_OR9_PRELIM)
230 memctl->memc_or9 = CFG_OR9_PRELIM;
231 memctl->memc_br9 = CFG_BR9_PRELIM;
234 #if defined(CFG_BR10_PRELIM) && defined(CFG_OR10_PRELIM)
235 memctl->memc_or10 = CFG_OR10_PRELIM;
236 memctl->memc_br10 = CFG_BR10_PRELIM;
239 #if defined(CFG_BR11_PRELIM) && defined(CFG_OR11_PRELIM)
240 memctl->memc_or11 = CFG_OR11_PRELIM;
241 memctl->memc_br11 = CFG_BR11_PRELIM;
248 * initialize higher level parts of CPU like time base and timers
250 int cpu_init_r (void)
252 volatile immap_t *immr = (immap_t *) gd->bd->bi_immr_base;
254 immr->im_cpm.cp_rccr = CFG_RCCR;
260 * print out the reason for the reset
262 int prt_8260_rsr (void)
270 RSR_CSRS, "Check Stop"}, {
271 RSR_SWRS, "Software Watchdog"}, {
272 RSR_BMRS, "Bus Monitor"}, {
273 RSR_ESRS, "External Soft"}, {
274 RSR_EHRS, "External Hard"}
276 static int n = sizeof bits / sizeof bits[0];
277 ulong rsr = gd->reset_status;
281 puts (CPU_ID_STR " Reset Status:");
284 for (i = 0; i < n; i++)
285 if (rsr & bits[i].mask) {
286 printf ("%s%s", sep, bits[i].desc);