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-rw-r--r--cpu/mpc86xx/cpu.c308
1 files changed, 308 insertions, 0 deletions
diff --git a/cpu/mpc86xx/cpu.c b/cpu/mpc86xx/cpu.c
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+++ b/cpu/mpc86xx/cpu.c
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+/*
+ * Copyright 2006 Freescale Semiconductor
+ * Jeff Brown
+ * Srikanth Srinivasan (srikanth.srinivasan@freescale.com)
+ *
+ * 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 <command.h>
+#include <asm/cache.h>
+#include <mpc86xx.h>
+
+#if defined(CONFIG_OF_FLAT_TREE)
+#include <ft_build.h>
+#endif
+
+#ifdef CONFIG_MPC8641HPCN
+extern void mpc8641_reset_board(cmd_tbl_t *cmdtp, int flag,
+ int argc, char *argv[]);
+#endif
+
+
+int
+checkcpu(void)
+{
+ sys_info_t sysinfo;
+ uint pvr, svr;
+ uint ver;
+ uint major, minor;
+ uint lcrr; /* local bus clock ratio register */
+ uint clkdiv; /* clock divider portion of lcrr */
+
+ puts("Freescale PowerPC\n");
+
+ pvr = get_pvr();
+ ver = PVR_VER(pvr);
+ major = PVR_MAJ(pvr);
+ minor = PVR_MIN(pvr);
+
+ puts("CPU:\n");
+ puts(" Core: ");
+
+ switch (ver) {
+ case PVR_VER(PVR_86xx):
+ puts("E600");
+ break;
+ default:
+ puts("Unknown");
+ break;
+ }
+ printf(", Version: %d.%d, (0x%08x)\n", major, minor, pvr);
+
+ svr = get_svr();
+ ver = SVR_VER(svr);
+ major = SVR_MAJ(svr);
+ minor = SVR_MIN(svr);
+
+ puts(" System: ");
+ switch (ver) {
+ case SVR_8641:
+ if (SVR_SUBVER(svr) == 1) {
+ puts("8641D");
+ } else {
+ puts("8641");
+ }
+ break;
+ default:
+ puts("Unknown");
+ break;
+ }
+ printf(", Version: %d.%d, (0x%08x)\n", major, minor, svr);
+
+ get_sys_info(&sysinfo);
+
+ puts(" Clocks: ");
+ printf("CPU:%4lu MHz, ", sysinfo.freqProcessor / 1000000);
+ printf("MPX:%4lu MHz, ", sysinfo.freqSystemBus / 1000000);
+ printf("DDR:%4lu MHz, ", sysinfo.freqSystemBus / 2000000);
+
+#if defined(CFG_LBC_LCRR)
+ lcrr = CFG_LBC_LCRR;
+#else
+ {
+ volatile immap_t *immap = (immap_t *) CFG_IMMR;
+ volatile ccsr_lbc_t *lbc = &immap->im_lbc;
+
+ lcrr = lbc->lcrr;
+ }
+#endif
+ clkdiv = lcrr & 0x0f;
+ if (clkdiv == 2 || clkdiv == 4 || clkdiv == 8) {
+ printf("LBC:%4lu MHz\n",
+ sysinfo.freqSystemBus / 1000000 / clkdiv);
+ } else {
+ printf(" LBC: unknown (lcrr: 0x%08x)\n", lcrr);
+ }
+
+ puts(" L2: ");
+ if (get_l2cr() & 0x80000000)
+ puts("Enabled\n");
+ else
+ puts("Disabled\n");
+
+ return 0;
+}
+
+
+static inline void
+soft_restart(unsigned long addr)
+{
+#ifndef CONFIG_MPC8641HPCN
+
+ /*
+ * SRR0 has system reset vector, SRR1 has default MSR value
+ * rfi restores MSR from SRR1 and sets the PC to the SRR0 value
+ */
+
+ __asm__ __volatile__ ("mtspr 26, %0" :: "r" (addr));
+ __asm__ __volatile__ ("li 4, (1 << 6)" ::: "r4");
+ __asm__ __volatile__ ("mtspr 27, 4");
+ __asm__ __volatile__ ("rfi");
+
+#else /* CONFIG_MPC8641HPCN */
+
+ out8(PIXIS_BASE + PIXIS_RST, 0);
+
+#endif /* !CONFIG_MPC8641HPCN */
+
+ while (1) ; /* not reached */
+}
+
+
+/*
+ * No generic way to do board reset. Simply call soft_reset.
+ */
+void
+do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+#ifndef CONFIG_MPC8641HPCN
+
+#ifdef CFG_RESET_ADDRESS
+ ulong 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.
+ */
+ ulong addr = CFG_MONITOR_BASE - sizeof(ulong);
+#endif
+
+ /* flush and disable I/D cache */
+ __asm__ __volatile__ ("mfspr 3, 1008" ::: "r3");
+ __asm__ __volatile__ ("ori 5, 5, 0xcc00" ::: "r5");
+ __asm__ __volatile__ ("ori 4, 3, 0xc00" ::: "r4");
+ __asm__ __volatile__ ("andc 5, 3, 5" ::: "r5");
+ __asm__ __volatile__ ("sync");
+ __asm__ __volatile__ ("mtspr 1008, 4");
+ __asm__ __volatile__ ("isync");
+ __asm__ __volatile__ ("sync");
+ __asm__ __volatile__ ("mtspr 1008, 5");
+ __asm__ __volatile__ ("isync");
+ __asm__ __volatile__ ("sync");
+
+ soft_restart(addr);
+
+#else /* CONFIG_MPC8641HPCN */
+
+ mpc8641_reset_board(cmdtp, flag, argc, argv);
+
+#endif /* !CONFIG_MPC8641HPCN */
+
+ while (1) ; /* not reached */
+}
+
+
+/*
+ * Get timebase clock frequency
+ */
+unsigned long
+get_tbclk(void)
+{
+ sys_info_t sys_info;
+
+ get_sys_info(&sys_info);
+ return (sys_info.freqSystemBus + 3L) / 4L;
+}
+
+
+#if defined(CONFIG_WATCHDOG)
+void
+watchdog_reset(void)
+{
+}
+#endif /* CONFIG_WATCHDOG */
+
+
+#if defined(CONFIG_DDR_ECC)
+void
+dma_init(void)
+{
+ volatile immap_t *immap = (immap_t *) CFG_IMMR;
+ volatile ccsr_dma_t *dma = &immap->im_dma;
+
+ dma->satr0 = 0x00040000;
+ dma->datr0 = 0x00040000;
+ asm("sync; isync");
+}
+
+uint
+dma_check(void)
+{
+ volatile immap_t *immap = (immap_t *) CFG_IMMR;
+ volatile ccsr_dma_t *dma = &immap->im_dma;
+ volatile uint status = dma->sr0;
+
+ /* While the channel is busy, spin */
+ while ((status & 4) == 4) {
+ status = dma->sr0;
+ }
+
+ if (status != 0) {
+ printf("DMA Error: status = %x\n", status);
+ }
+ return status;
+}
+
+int
+dma_xfer(void *dest, uint count, void *src)
+{
+ volatile immap_t *immap = (immap_t *) CFG_IMMR;
+ volatile ccsr_dma_t *dma = &immap->im_dma;
+
+ dma->dar0 = (uint) dest;
+ dma->sar0 = (uint) src;
+ dma->bcr0 = count;
+ dma->mr0 = 0xf000004;
+ asm("sync;isync");
+ dma->mr0 = 0xf000005;
+ asm("sync;isync");
+ return dma_check();
+}
+
+#endif /* CONFIG_DDR_ECC */
+
+
+#ifdef CONFIG_OF_FLAT_TREE
+void
+ft_cpu_setup(void *blob, bd_t *bd)
+{
+ u32 *p;
+ ulong clock;
+ int len;
+
+ clock = bd->bi_busfreq;
+ p = ft_get_prop(blob, "/cpus/" OF_CPU "/bus-frequency", &len);
+ if (p != NULL)
+ *p = cpu_to_be32(clock);
+
+ p = ft_get_prop(blob, "/" OF_SOC "/serial@4500/clock-frequency", &len);
+ if (p != NULL)
+ *p = cpu_to_be32(clock);
+
+ p = ft_get_prop(blob, "/" OF_SOC "/serial@4600/clock-frequency", &len);
+ if (p != NULL)
+ *p = cpu_to_be32(clock);
+
+#if defined(CONFIG_MPC86XX_TSEC1)
+ p = ft_get_prop(blob, "/" OF_SOC "/ethernet@24000/mac-address", &len);
+ memcpy(p, bd->bi_enetaddr, 6);
+#endif
+
+#if defined(CONFIG_MPC86XX_TSEC2)
+ p = ft_get_prop(blob, "/" OF_SOC "/ethernet@25000/mac-address", &len);
+ memcpy(p, bd->bi_enet1addr, 6);
+#endif
+
+#if defined(CONFIG_MPC86XX_TSEC3)
+ p = ft_get_prop(blob, "/" OF_SOC "/ethernet@26000/mac-address", &len);
+ memcpy(p, bd->bi_enet2addr, 6);
+#endif
+
+#if defined(CONFIG_MPC86XX_TSEC4)
+ p = ft_get_prop(blob, "/" OF_SOC "/ethernet@27000/mac-address", &len);
+ memcpy(p, bd->bi_enet3addr, 6);
+#endif
+
+}
+#endif
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