Initial revision

1 files changed, 262 insertions, 0 deletions

diff --git a/cpu/mpc8xx/cpu_init.c b/cpu/mpc8xx/cpu_init.c
new file mode 100644
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--- /dev/null
+++ b/cpu/mpc8xx/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 <watchdog.h>
+
+#include <mpc8xx.h>
+#include <commproc.h>
+
+#if defined(CFG_I2C_UCODE_PATCH) || defined(CFG_SPI_UCODE_PATCH)
+void cpm_load_patch (volatile immap_t * immr);
+#endif
+
+/*
+ * 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)
+{
+#ifndef CONFIG_MBX
+	volatile memctl8xx_t *memctl = &immr->im_memctl;
+	ulong reg;
+#endif
+
+	/* SYPCR - contains watchdog control (11-9) */
+
+	immr->im_siu_conf.sc_sypcr = CFG_SYPCR;
+
+#if defined(CONFIG_WATCHDOG)
+	reset_8xx_watchdog (immr);
+#endif /* CONFIG_WATCHDOG */
+
+	/* SIUMCR - contains debug pin configuration (11-6) */
+
+	immr->im_siu_conf.sc_siumcr |= CFG_SIUMCR;
+
+	/* initialize timebase status and control register (11-26) */
+	/* unlock TBSCRK */
+
+	immr->im_sitk.sitk_tbscrk = KAPWR_KEY;
+	immr->im_sit.sit_tbscr = CFG_TBSCR;
+
+	/* initialize the PIT (11-31) */
+
+	immr->im_sitk.sitk_piscrk = KAPWR_KEY;
+	immr->im_sit.sit_piscr = CFG_PISCR;
+
+	/* PLL (CPU clock) settings (15-30) */
+
+	immr->im_clkrstk.cark_plprcrk = KAPWR_KEY;
+
+#ifndef CONFIG_MBX		/* MBX board does things different */
+
+	/* If CFG_PLPRCR (set in the various *_config.h files) tries to
+	 * set the MF field, then just copy CFG_PLPRCR over car_plprcr,
+	 * otherwise OR in CFG_PLPRCR so we do not change the currentMF
+	 * field value.
+	 */
+#if ((CFG_PLPRCR & PLPRCR_MF_MSK) != 0)
+	reg = CFG_PLPRCR;			/* reset control bits   */
+#else
+	reg = immr->im_clkrst.car_plprcr;
+	reg &= PLPRCR_MF_MSK;			/* isolate MF field */
+	reg |= CFG_PLPRCR;			/* reset control bits   */
+#endif
+	immr->im_clkrst.car_plprcr = reg;
+
+	/* System integration timers. Don't change EBDF! (15-27) */
+
+	immr->im_clkrstk.cark_sccrk = KAPWR_KEY;
+	reg = immr->im_clkrst.car_sccr;
+	reg &= SCCR_MASK;
+	reg |= CFG_SCCR;
+	immr->im_clkrst.car_sccr = reg;
+
+	/*
+	 * Memory Controller:
+	 */
+
+	/* perform BR0 reset that MPC850 Rev. A can't guarantee */
+	reg = memctl->memc_br0;
+	reg &= BR_PS_MSK;	/* Clear everything except Port Size bits */
+	reg |= BR_V;		/* then add just the "Bank Valid" bit     */
+	memctl->memc_br0 = reg;
+
+	/* Map banks 0 (and maybe 1) to the FLASH banks 0 (and 1) at
+	 * preliminary addresses - these have to be modified later
+	 * when FLASH size has been determined
+	 *
+	 * Depending on the size of the memory region defined by
+	 * CFG_OR0_REMAP some boards (wide address mask) allow to map the
+	 * CFG_MONITOR_BASE, while others (narrower address mask) can't
+	 * map CFG_MONITOR_BASE.
+	 *
+	 * For example, for CONFIG_IVMS8, the CFG_MONITOR_BASE is
+	 * 0xff000000, but CFG_OR0_REMAP's address mask is 0xfff80000.
+	 *
+	 * If BR0 wasn't loaded with address base 0xff000000, then BR0's
+	 * base address remains as 0x00000000. However, the address mask
+	 * have been narrowed to 512Kb, so CFG_MONITOR_BASE wasn't mapped
+	 * into the Bank0.
+	 *
+	 * This is why CONFIG_IVMS8 and similar boards must load BR0 with
+	 * CFG_BR0_PRELIM in advance.
+	 *
+	 * [Thanks to Michael Liao for this explanation.
+	 *  I owe him a free beer. - wd]
+	 */
+
+#if defined(CONFIG_GTH)	        || \
+    defined(CONFIG_HERMES)	|| \
+    defined(CONFIG_ICU862)	|| \
+    defined(CONFIG_IP860)	|| \
+    defined(CONFIG_IVML24)	|| \
+    defined(CONFIG_IVMS8)	|| \
+    defined(CONFIG_LWMON)	|| \
+    defined(CONFIG_MHPC)	|| \
+    defined(CONFIG_PCU_E)	|| \
+    defined(CONFIG_R360MPI)	|| \
+    defined(CONFIG_RPXCLASSIC)	|| \
+    defined(CONFIG_RPXLITE)	|| \
+    defined(CONFIG_SPD823TS)	|| \
+   (defined(CONFIG_MPC860T) && defined(CONFIG_FADS))
+
+	memctl->memc_br0 = CFG_BR0_PRELIM;
+#endif
+
+#if defined(CFG_OR0_REMAP)
+	memctl->memc_or0 = CFG_OR0_REMAP;
+#endif
+#if defined(CFG_OR1_REMAP)
+	memctl->memc_or1 = CFG_OR1_REMAP;
+#endif
+#if defined(CFG_OR5_REMAP)
+	memctl->memc_or5 = CFG_OR5_REMAP;
+#endif
+
+	/* now restrict to preliminary range */
+	memctl->memc_br0 = CFG_BR0_PRELIM;
+	memctl->memc_or0 = CFG_OR0_PRELIM;
+
+#if (defined(CFG_OR1_PRELIM) && defined(CFG_BR1_PRELIM))
+	memctl->memc_or1 = CFG_OR1_PRELIM;
+	memctl->memc_br1 = CFG_BR1_PRELIM;
+#endif
+
+#if defined(CONFIG_IP860) /* disable CS0 now that Flash is mapped on CS1 */
+	memctl->memc_br0 = 0;
+#endif
+
+#if defined(CFG_OR2_PRELIM) && defined(CFG_BR2_PRELIM)
+	memctl->memc_or2 = CFG_OR2_PRELIM;
+	memctl->memc_br2 = CFG_BR2_PRELIM;
+#endif
+
+#if defined(CFG_OR3_PRELIM) && defined(CFG_BR3_PRELIM)
+	memctl->memc_or3 = CFG_OR3_PRELIM;
+	memctl->memc_br3 = CFG_BR3_PRELIM;
+#endif
+
+#if defined(CFG_OR4_PRELIM) && defined(CFG_BR4_PRELIM)
+	memctl->memc_or4 = CFG_OR4_PRELIM;
+	memctl->memc_br4 = CFG_BR4_PRELIM;
+#endif
+
+#if defined(CFG_OR5_PRELIM) && defined(CFG_BR5_PRELIM)
+	memctl->memc_or5 = CFG_OR5_PRELIM;
+	memctl->memc_br5 = CFG_BR5_PRELIM;
+#endif
+
+#if defined(CFG_OR6_PRELIM) && defined(CFG_BR6_PRELIM)
+	memctl->memc_or6 = CFG_OR6_PRELIM;
+	memctl->memc_br6 = CFG_BR6_PRELIM;
+#endif
+
+#if defined(CFG_OR7_PRELIM) && defined(CFG_BR7_PRELIM)
+	memctl->memc_or7 = CFG_OR7_PRELIM;
+	memctl->memc_br7 = CFG_BR7_PRELIM;
+#endif
+
+#endif /* ! CONFIG_MBX */
+
+	/*
+	 * Reset CPM
+	 */
+	immr->im_cpm.cp_cpcr = CPM_CR_RST | CPM_CR_FLG;
+	do {			/* Spin until command processed     */
+		__asm__ ("eieio");
+	} while (immr->im_cpm.cp_cpcr & CPM_CR_FLG);
+
+#ifdef CONFIG_MBX
+	/*
+	 * on the MBX, things are a little bit different:
+	 * - we need to read the VPD to get board information
+	 * - the plprcr is set up dynamically
+	 * - the memory controller is set up dynamically
+	 */
+	mbx_init ();
+#endif /* CONFIG_MBX */
+
+#ifdef CONFIG_RPXCLASSIC
+	rpxclassic_init ();
+#endif
+
+#ifdef CFG_RCCR			/* must be done before cpm_load_patch() */
+	/* write config value */
+	immr->im_cpm.cp_rccr = CFG_RCCR;
+#endif
+
+#if defined(CFG_I2C_UCODE_PATCH) || defined(CFG_SPI_UCODE_PATCH)
+	cpm_load_patch (immr);	/* load mpc8xx  microcode patch */
+#endif
+}
+
+/*
+ * initialize higher level parts of CPU like timers
+ */
+int cpu_init_r (void)
+{
+#if defined(CFG_RTCSC) || defined(CFG_RMDS)
+	DECLARE_GLOBAL_DATA_PTR;
+
+	bd_t *bd = gd->bd;
+	volatile immap_t *immr = (volatile immap_t *) (bd->bi_immr_base);
+#endif
+
+#ifdef CFG_RTCSC
+	/* Unlock RTSC register */
+	immr->im_sitk.sitk_rtcsck = KAPWR_KEY;
+	/* write config value */
+	immr->im_sit.sit_rtcsc = CFG_RTCSC;
+#endif
+
+#ifdef CFG_RMDS
+	/* write config value */
+	immr->im_cpm.cp_rmds = CFG_RMDS;
+#endif
+	return (0);
+}