Initial revision

1 files changed, 243 insertions, 0 deletions

diff --git a/cpu/mpc8260/cpu.c b/cpu/mpc8260/cpu.c
new file mode 100644
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--- /dev/null
+++ b/cpu/mpc8260/cpu.c
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+/*
+ * (C) Copyright 2000
+ * 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
+ */
+
+/*
+ * CPU specific code for the MPC8260
+ *
+ * written or collected and sometimes rewritten by
+ * Magnus Damm <damm@bitsmart.com>
+ *
+ * minor modifications by
+ * Wolfgang Denk <wd@denx.de>
+ *
+ * modified for 8260 by
+ * Murray Jensen <Murray.Jensen@cmst.csiro.au>
+ *
+ * added 8260 masks by
+ * Marius Groeger <mag@sysgo.de>
+ */
+
+#include <common.h>
+#include <watchdog.h>
+#include <command.h>
+#include <mpc8260.h>
+#include <asm/processor.h>
+#include <asm/cpm_8260.h>
+
+int checkcpu (void)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+
+	volatile immap_t *immap = (immap_t *) CFG_IMMR;
+	ulong clock = gd->cpu_clk;
+	uint pvr = get_pvr ();
+	uint immr, rev, m, k;
+	char buf[32];
+
+	puts ("CPU:   ");
+
+	if (((pvr >> 16) & 0xff) != 0x81)
+		return -1;	/* whoops! not an MPC8260 */
+	rev = pvr & 0xff;
+
+	immr = immap->im_memctl.memc_immr;
+	if ((immr & IMMR_ISB_MSK) != CFG_IMMR)
+		return -1;	/* whoops! someone moved the IMMR */
+
+	printf ("MPC8260 (Rev %02x, Mask ", rev);
+
+	/*
+	 * the bottom 16 bits of the immr are the Part Number and Mask Number
+	 * (4-34); the 16 bits at PROFF_REVNUM (0x8af0) in dual port ram is the
+	 * RISC Microcode Revision Number (13-10).
+	 * For the 8260, Motorola doesn't include the Microcode Revision
+	 * in the mask.
+	 */
+	m = immr & (IMMR_PARTNUM_MSK | IMMR_MASKNUM_MSK);
+	k = *((ushort *) & immap->im_dprambase[PROFF_REVNUM]);
+
+	switch (m) {
+	case 0x0000:
+		printf ("0.2 2J24M");
+		break;
+	case 0x0010:
+		printf ("A.0 K22A");
+		break;
+	case 0x0011:
+		printf ("A.1 1K22A-XC");
+		break;
+	case 0x0001:
+		printf ("B.1 1K23A");
+		break;
+	case 0x0021:
+		printf ("B.2 2K23A-XC");
+		break;
+	case 0x0023:
+		printf ("B.3 3K23A");
+		break;
+	case 0x0024:
+		printf ("C.2 6K23A");
+		break;
+	case 0x0060:
+		printf ("A.0(A) 2K25A");
+		break;
+	default:
+		printf ("unknown [immr=0x%04x,k=0x%04x]", m, k);
+		break;
+	}
+
+	printf (") at %s MHz\n", strmhz (buf, clock));
+
+	return 0;
+}
+
+/* ------------------------------------------------------------------------- */
+/* configures a UPM by writing into the UPM RAM array			     */
+/* uses bank 11 and a dummy physical address (=BRx_BA_MSK)		     */
+/* NOTE: the physical address chosen must not overlap into any other area    */
+/* mapped by the memory controller because bank 11 has the lowest priority   */
+
+void upmconfig (uint upm, uint * table, uint size)
+{
+	volatile immap_t *immap = (immap_t *) CFG_IMMR;
+	volatile memctl8260_t *memctl = &immap->im_memctl;
+	volatile uchar *dummy = (uchar *) BRx_BA_MSK;	/* set all BA bits */
+	uint i;
+
+	/* first set up bank 11 to reference the correct UPM at a dummy address */
+
+	memctl->memc_or11 = ORxU_AM_MSK;	/* set all AM bits */
+
+	switch (upm) {
+
+	case UPMA:
+		memctl->memc_br11 =
+			((uint)dummy & BRx_BA_MSK) | BRx_PS_32 | BRx_MS_UPMA |
+			BRx_V;
+		memctl->memc_mamr = MxMR_OP_WARR;
+		break;
+
+	case UPMB:
+		memctl->memc_br11 =
+			((uint)dummy & BRx_BA_MSK) | BRx_PS_32 | BRx_MS_UPMB |
+			BRx_V;
+		memctl->memc_mbmr = MxMR_OP_WARR;
+		break;
+
+	case UPMC:
+		memctl->memc_br11 =
+			((uint)dummy & BRx_BA_MSK) | BRx_PS_32 | BRx_MS_UPMC |
+			BRx_V;
+		memctl->memc_mcmr = MxMR_OP_WARR;
+		break;
+
+	default:
+		panic ("upmconfig passed invalid UPM number (%u)\n", upm);
+		break;
+
+	}
+
+	/*
+	 * at this point, the dummy address is set up to access the selected UPM,
+	 * the MAD pointer is zero, and the MxMR OP is set for writing to RAM
+	 *
+	 * now we simply load the mdr with each word and poke the dummy address.
+	 * the MAD is incremented on each access.
+	 */
+
+	for (i = 0; i < size; i++) {
+		memctl->memc_mdr = table[i];
+		*dummy = 0;
+	}
+
+	/* now kill bank 11 */
+	memctl->memc_br11 = 0;
+}
+
+/* ------------------------------------------------------------------------- */
+
+int
+do_reset (cmd_tbl_t * cmdtp, bd_t * bd, int flag, int argc, char *argv[])
+{
+	ulong msr, addr;
+
+	volatile immap_t *immap = (immap_t *) CFG_IMMR;
+
+	immap->im_clkrst.car_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
+	 */
+#ifdef CFG_RESET_ADDRESS
+	addr = CFG_RESET_ADDRESS;
+#else
+	/*
+	 * note: when CFG_MONITOR_BASE points to a RAM address, CFG_MONITOR_BASE
+	 * - sizeof (ulong) is usually a valid address. Better pick an address
+	 * known to be invalid on your system and assign it to CFG_RESET_ADDRESS.
+	 */
+	addr = CFG_MONITOR_BASE - sizeof (ulong);
+#endif
+	((void (*)(void)) addr) ();
+	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)
+{
+	int re_enable = disable_interrupts ();
+
+	reset_8260_watchdog ((immap_t *) CFG_IMMR);
+	if (re_enable)
+		enable_interrupts ();
+}
+#endif /* CONFIG_WATCHDOG */
+
+/* ------------------------------------------------------------------------- */