Initial revision

1 files changed, 264 insertions, 0 deletions

diff --git a/cpu/mpc8260/cpu_init.c b/cpu/mpc8260/cpu_init.c
new file mode 100644
index 0000000000..9f9369ab3a
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+++ b/cpu/mpc8260/cpu_init.c
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+/*
+ * (C) Copyright 2000-2002
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <mpc8260.h>
+#include <asm/cpm_8260.h>
+#include <ioports.h>
+
+static void config_8260_ioports (volatile immap_t * immr)
+{
+	int portnum;
+
+	for (portnum = 0; portnum < 4; portnum++) {
+		uint pmsk = 0,
+		     ppar = 0,
+		     psor = 0,
+		     pdir = 0,
+		     podr = 0,
+		     pdat = 0;
+		iop_conf_t *iopc = (iop_conf_t *) & iop_conf_tab[portnum][0];
+		iop_conf_t *eiopc = iopc + 32;
+		uint msk = 1;
+
+		/*
+		 * NOTE:
+		 * index 0 refers to pin 31,
+		 * index 31 refers to pin 0
+		 */
+		while (iopc < eiopc) {
+			if (iopc->conf) {
+				pmsk |= msk;
+				if (iopc->ppar)
+					ppar |= msk;
+				if (iopc->psor)
+					psor |= msk;
+				if (iopc->pdir)
+					pdir |= msk;
+				if (iopc->podr)
+					podr |= msk;
+				if (iopc->pdat)
+					pdat |= msk;
+			}
+
+			msk <<= 1;
+			iopc++;
+		}
+
+		if (pmsk != 0) {
+			volatile ioport_t *iop = ioport_addr (immr, portnum);
+			uint tpmsk = ~pmsk;
+
+			/*
+                         * the (somewhat confused) paragraph at the
+                         * bottom of page 35-5 warns that there might
+                         * be "unknown behaviour" when programming
+                         * PSORx and PDIRx, if PPARx = 1, so I
+                         * decided this meant I had to disable the
+                         * dedicated function first, and enable it
+                         * last.
+			 */
+			iop->ppar &= tpmsk;
+			iop->psor = (iop->psor & tpmsk) | psor;
+			iop->pdat = (iop->pdat & tpmsk) | pdat;
+			iop->pdir = (iop->pdir & tpmsk) | pdir;
+			iop->podr = (iop->podr & tpmsk) | podr;
+			iop->ppar |= ppar;
+		}
+	}
+}
+
+/*
+ * Breath some life into the CPU...
+ *
+ * Set up the memory map,
+ * initialize a bunch of registers,
+ * initialize the UPM's
+ */
+void cpu_init_f (volatile immap_t * immr)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+
+	volatile memctl8260_t *memctl = &immr->im_memctl;
+	extern void m8260_cpm_reset (void);
+
+	/* Pointer is writable since we allocated a register for it */
+	gd = (gd_t *) (CFG_INIT_RAM_ADDR + CFG_GBL_DATA_OFFSET);
+
+	/* Clear initial global data */
+	memset ((void *) gd, 0, sizeof (gd_t));
+
+	/* RSR - Reset Status Register - clear all status (5-4) */
+	gd->reset_status = immr->im_clkrst.car_rsr;
+	immr->im_clkrst.car_rsr = RSR_ALLBITS;
+
+	/* RMR - Reset Mode Register - contains checkstop reset enable (5-5) */
+	immr->im_clkrst.car_rmr = CFG_RMR;
+
+	/* BCR - Bus Configuration Register (4-25) */
+	immr->im_siu_conf.sc_bcr = CFG_BCR;
+
+	/* SIUMCR - contains debug pin configuration (4-31) */
+	immr->im_siu_conf.sc_siumcr = CFG_SIUMCR;
+
+	config_8260_ioports (immr);
+
+	/* initialize time counter status and control register (4-40) */
+	immr->im_sit.sit_tmcntsc = CFG_TMCNTSC;
+
+	/* initialize the PIT (4-42) */
+	immr->im_sit.sit_piscr = CFG_PISCR;
+
+#if !defined(CONFIG_COGENT)		/* done in start.S for the cogent */
+	/* System clock control register (9-8) */
+	immr->im_clkrst.car_sccr = CFG_SCCR;
+#endif /* !CONFIG_COGENT */
+
+	/*
+	 * Memory Controller:
+	 */
+
+	/* Map banks 0 and 1 to the FLASH banks 0 and 1 at preliminary
+	 * addresses - these have to be modified later when FLASH size
+	 * has been determined
+	 */
+
+#if defined(CFG_OR0_REMAP)
+	memctl->memc_or0 = CFG_OR0_REMAP;
+#endif
+#if defined(CFG_OR1_REMAP)
+	memctl->memc_or1 = CFG_OR1_REMAP;
+#endif
+
+	/* now restrict to preliminary range */
+	memctl->memc_br0 = CFG_BR0_PRELIM;
+	memctl->memc_or0 = CFG_OR0_PRELIM;
+
+#if defined(CFG_BR1_PRELIM) && defined(CFG_OR1_PRELIM)
+	memctl->memc_or1 = CFG_OR1_PRELIM;
+	memctl->memc_br1 = CFG_BR1_PRELIM;
+#endif
+
+#if defined(CFG_BR2_PRELIM) && defined(CFG_OR2_PRELIM)
+	memctl->memc_or2 = CFG_OR2_PRELIM;
+	memctl->memc_br2 = CFG_BR2_PRELIM;
+#endif
+
+#if defined(CFG_BR3_PRELIM) && defined(CFG_OR3_PRELIM)
+	memctl->memc_or3 = CFG_OR3_PRELIM;
+	memctl->memc_br3 = CFG_BR3_PRELIM;
+#endif
+
+#if defined(CFG_BR4_PRELIM) && defined(CFG_OR4_PRELIM)
+	memctl->memc_or4 = CFG_OR4_PRELIM;
+	memctl->memc_br4 = CFG_BR4_PRELIM;
+#endif
+
+#if defined(CFG_BR5_PRELIM) && defined(CFG_OR5_PRELIM)
+	memctl->memc_or5 = CFG_OR5_PRELIM;
+	memctl->memc_br5 = CFG_BR5_PRELIM;
+#endif
+
+#if defined(CFG_BR6_PRELIM) && defined(CFG_OR6_PRELIM)
+	memctl->memc_or6 = CFG_OR6_PRELIM;
+	memctl->memc_br6 = CFG_BR6_PRELIM;
+#endif
+
+#if defined(CFG_BR7_PRELIM) && defined(CFG_OR7_PRELIM)
+	memctl->memc_or7 = CFG_OR7_PRELIM;
+	memctl->memc_br7 = CFG_BR7_PRELIM;
+#endif
+
+#if defined(CFG_BR8_PRELIM) && defined(CFG_OR8_PRELIM)
+	memctl->memc_or8 = CFG_OR8_PRELIM;
+	memctl->memc_br8 = CFG_BR8_PRELIM;
+#endif
+
+#if defined(CFG_BR9_PRELIM) && defined(CFG_OR9_PRELIM)
+	memctl->memc_or9 = CFG_OR9_PRELIM;
+	memctl->memc_br9 = CFG_BR9_PRELIM;
+#endif
+
+#if defined(CFG_BR10_PRELIM) && defined(CFG_OR10_PRELIM)
+	memctl->memc_or10 = CFG_OR10_PRELIM;
+	memctl->memc_br10 = CFG_BR10_PRELIM;
+#endif
+
+#if defined(CFG_BR11_PRELIM) && defined(CFG_OR11_PRELIM)
+	memctl->memc_or11 = CFG_OR11_PRELIM;
+	memctl->memc_br11 = CFG_BR11_PRELIM;
+#endif
+
+	m8260_cpm_reset ();
+}
+
+/*
+ * initialize higher level parts of CPU like time base and timers
+ */
+int cpu_init_r (void)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+
+	volatile immap_t *immr = (immap_t *) gd->bd->bi_immr_base;
+
+	immr->im_cpm.cp_rccr = CFG_RCCR;
+
+	return (0);
+}
+
+/*
+ * print out the reason for the reset
+ */
+int prt_8260_rsr (void)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+
+	static struct {
+		ulong mask;
+		char *desc;
+	} bits[] = {
+		{
+		RSR_JTRS, "JTAG"}, {
+		RSR_CSRS, "Check Stop"}, {
+		RSR_SWRS, "Software Watchdog"}, {
+		RSR_BMRS, "Bus Monitor"}, {
+		RSR_ESRS, "External Soft"}, {
+		RSR_EHRS, "External Hard"}
+	};
+	static int n = sizeof bits / sizeof bits[0];
+	ulong rsr = gd->reset_status;
+	int i;
+	char *sep;
+
+	puts ("MPC8260 Reset Status:");
+
+	sep = " ";
+	for (i = 0; i < n; i++)
+		if (rsr & bits[i].mask) {
+			printf ("%s%s", sep, bits[i].desc);
+			sep = ", ";
+		}
+
+	puts ("\n\n");
+	return (0);
+}