summaryrefslogtreecommitdiff
path: root/cpu/mpc85xx/cpu.c
diff options
context:
space:
mode:
authorwdenk <wdenk>2003-10-15 23:53:47 +0000
committerwdenk <wdenk>2003-10-15 23:53:47 +0000
commit42d1f0394bef0624fc9664714d54bb137931d6a6 (patch)
tree892a4130507484d25faf9a72e019cf88cfb3e3d9 /cpu/mpc85xx/cpu.c
parent2d5b561e2bfdee8552a99b2cf93016cce2a74895 (diff)
downloadu-boot-imx-42d1f0394bef0624fc9664714d54bb137931d6a6.zip
u-boot-imx-42d1f0394bef0624fc9664714d54bb137931d6a6.tar.gz
u-boot-imx-42d1f0394bef0624fc9664714d54bb137931d6a6.tar.bz2
* Patches by Xianghua Xiao, 15 Oct 2003:
- Added Motorola CPU 8540/8560 support (cpu/85xx) - Added Motorola MPC8540ADS board support (board/mpc8540ads) - Added Motorola MPC8560ADS board support (board/mpc8560ads) * Minor code cleanup
Diffstat (limited to 'cpu/mpc85xx/cpu.c')
-rw-r--r--cpu/mpc85xx/cpu.c151
1 files changed, 151 insertions, 0 deletions
diff --git a/cpu/mpc85xx/cpu.c b/cpu/mpc85xx/cpu.c
new file mode 100644
index 0000000..64f2782
--- /dev/null
+++ b/cpu/mpc85xx/cpu.c
@@ -0,0 +1,151 @@
+/*
+ * (C) Copyright 2002, 2003 Motorola Inc.
+ * Xianghua Xiao (X.Xiao@motorola.com)
+ *
+ * (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
+ */
+
+#include <common.h>
+#include <watchdog.h>
+#include <command.h>
+#include <asm/cache.h>
+
+/* ------------------------------------------------------------------------- */
+
+int checkcpu (void)
+{
+ uint pir = get_pir();
+ uint pvr = get_pvr();
+
+ printf("Motorola PowerPC ProcessorID=%08x Rev. ",pir);
+ switch(pvr) {
+ default:
+ printf("PVR=%08x", pvr);
+ break;
+ }
+
+ printf("\n");
+
+ return 0;
+}
+
+
+/* ------------------------------------------------------------------------- */
+
+int do_reset (cmd_tbl_t *cmdtp, bd_t *bd, int flag, int argc, char *argv[])
+{
+ /*
+ * Initiate hard reset in debug control register DBCR0
+ * Make sure MSR[DE] = 1
+ */
+ __asm__ __volatile__("lis 3, 0x7000" ::: "r3");
+ mtspr(DBCR0,3);
+ return 1;
+}
+
+
+/*
+ * 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)
+{
+ int re_enable = disable_interrupts();
+ reset_85xx_watchdog();
+ if (re_enable) enable_interrupts();
+}
+
+void
+reset_85xx_watchdog(void)
+{
+ /*
+ * Clear TSR(WIS) bit by writing 1
+ */
+ unsigned long val;
+ val = mfspr(tsr);
+ val |= 0x40000000;
+ mtspr(tsr, val);
+}
+#endif /* CONFIG_WATCHDOG */
+
+#if defined(CONFIG_DDR_ECC)
+__inline__ void dcbz(const void* addr)
+{
+ __asm__ __volatile__ ("dcbz 0,%0" :: "r" (addr));
+}
+
+__inline__ void dcbf(const void* addr)
+{
+ __asm__ __volatile__ ("dcbf 0,%0" :: "r" (addr));
+}
+
+void dma_init(void) {
+ volatile immap_t *immap = (immap_t *)CFG_IMMR;
+ volatile ccsr_dma_t *dma = &immap->im_dma;
+
+ dma->satr0 = 0x02c40000;
+ dma->datr0 = 0x02c40000;
+ asm("sync; isync; msync");
+ return;
+}
+
+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;msync");
+ dma->mr0 = 0xf000005;
+ asm("sync;isync;msync");
+ return dma_check();
+}
+#endif