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authorEran Liberty <liberty@freescale.com>2005-07-28 10:08:46 -0500
committerJon Loeliger <jdl@freescale.com>2005-07-28 10:08:46 -0500
commitf046ccd15c8bc9613bfd72916b761a127d36e5c6 (patch)
tree40b48bdc1fff75c661cab5c4806a322a67e9dc44 /cpu/mpc83xx/cpu.c
parent63be111e72371b6edc6d02134dd785abb6be188c (diff)
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* Patch by Eran Liberty
Add support for the Freescale MPC8349ADS board.
Diffstat (limited to 'cpu/mpc83xx/cpu.c')
-rw-r--r--cpu/mpc83xx/cpu.c145
1 files changed, 145 insertions, 0 deletions
diff --git a/cpu/mpc83xx/cpu.c b/cpu/mpc83xx/cpu.c
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+/*
+ * Copyright 2004 Freescale Semiconductor, Inc.
+ *
+ * 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
+ *
+ * Change log:
+ *
+ * 20050101: Eran Liberty (liberty@freescale.com)
+ * Initial file creating (porting from 85XX & 8260)
+ */
+
+/*
+ * CPU specific code for the MPC83xx family.
+ *
+ * Derived from the MPC8260 and MPC85xx.
+ */
+
+#include <common.h>
+#include <watchdog.h>
+#include <command.h>
+#include <mpc83xx.h>
+#include <asm/processor.h>
+
+
+int checkcpu(void)
+{
+ DECLARE_GLOBAL_DATA_PTR;
+ ulong clock = gd->cpu_clk;
+ u32 pvr = get_pvr();
+ char buf[32];
+
+ if ((pvr & 0xFFFF0000) != PVR_83xx) {
+ puts("Not MPC83xx Family!!!\n");
+ return -1;
+ }
+
+ puts("CPU: MPC83xx, ");
+ switch(pvr) {
+ case PVR_8349_REV10:
+ break;
+ case PVR_8349_REV11:
+ break;
+ default:
+ puts("Rev: Unknown\n");
+ return -1; /* Not sure what this is */
+ }
+ printf("Rev: %02x at %s MHz\n",pvr & 0x0000FFFF, strmhz(buf, clock));
+ return 0;
+}
+
+
+void upmconfig (uint upm, uint *table, uint size)
+{
+ hang(); /* FIXME: upconfig() needed? */
+}
+
+
+int
+do_reset (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
+{
+ ulong msr, addr;
+
+ volatile immap_t *immap = (immap_t *) CFG_IMMRBAR;
+
+#ifdef MPC83xx_RESET
+ /* Interrupts and MMU off */
+ __asm__ __volatile__ ("mfmsr %0":"=r" (msr):);
+
+ msr &= ~( MSR_EE | MSR_IR | MSR_DR);
+ __asm__ __volatile__ ("mtmsr %0"::"r" (msr));
+
+ /* enable Reset Control Reg */
+ immap->reset.rpr = 0x52535445;
+
+ /* confirm Reset Control Reg is enabled */
+ while(!((immap->reset.rcer) & RCER_CRE));
+
+ printf("Resetting the board.");
+ printf("\n");
+
+ udelay(200);
+
+ /* perform reset, only one bit */
+ immap->reset.rcr = RCR_SWHR;
+#else
+ immap->reset.rmr = RMR_CSRE; /* Checkstop Reset enable */
+
+ /* Interrupts and MMU off */
+ __asm__ __volatile__ ("mfmsr %0":"=r" (msr):);
+
+ msr &= ~(MSR_ME | MSR_EE | MSR_IR | MSR_DR);
+ __asm__ __volatile__ ("mtmsr %0"::"r" (msr));
+
+ /*
+ * Trying to execute the next instruction at a non-existing address
+ * should cause a machine check, resulting in reset
+ */
+ addr = CFG_RESET_ADDRESS;
+
+ printf("resetting the board.");
+ printf("\n");
+ ((void (*)(void)) addr) ();
+#endif
+ return 1;
+}
+
+
+/*
+ * Get timebase clock frequency (like cpu_clk in Hz)
+ */
+
+unsigned long get_tbclk(void)
+{
+ DECLARE_GLOBAL_DATA_PTR;
+
+ ulong tbclk;
+
+ tbclk = (gd->bus_clk + 3L) / 4L;
+
+ return tbclk;
+}
+
+
+#if defined(CONFIG_WATCHDOG)
+void watchdog_reset (void)
+{
+ hang(); /* FIXME: implement watchdog_reset()? */
+}
+#endif /* CONFIG_WATCHDOG */