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authorwdenk <wdenk>2002-08-27 09:48:53 +0000
committerwdenk <wdenk>2002-08-27 09:48:53 +0000
commit4a9cbbe832e1c377d04cfb53e9679844595bc3cf (patch)
tree10a14a7f9764d6a3e2fe056bbc4538fc9004075a /cpu/mpc8260/cpu.c
parente887afc9da0fec9b7bbdf6b13b920ed30006edfc (diff)
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Initial revision
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-rw-r--r--cpu/mpc8260/cpu.c243
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diff --git a/cpu/mpc8260/cpu.c 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 */
+
+/* ------------------------------------------------------------------------- */