/* * (C) Copyright 2000-2003 * 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 MPC825x / MPC826x / MPC827x / MPC828x * * written or collected and sometimes rewritten by * Magnus Damm * * modified by * Wolfgang Denk * * modified for 8260 by * Murray Jensen * * added 8260 masks by * Marius Groeger * * added HiP7 (8270/8275/8280) processors support by * Yuli Barcohen */ #include #include #include #include #include #include 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: "); switch (pvr) { case PVR_8260: case PVR_8260_HIP3: k = 3; break; case PVR_8260_HIP4: k = 4; break; case PVR_8260_HIP7: k = 7; break; default: 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 (CPU_ID_STR " (HiP%d Rev %02x, Mask ", k, 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; case 0x0062: printf ("B.1 4K25A"); break; case 0x0A00: printf ("0.0 0K49M"); break; case 0x0A01: printf ("0.1 1K49M"); 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, 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 */ /* ------------------------------------------------------------------------- */