1 files changed, 76 insertions, 0 deletions
diff --git a/arch/powerpc/cpu/mpc5xxx/loadtask.c b/arch/powerpc/cpu/mpc5xxx/loadtask.c
new file mode 100644
index 00000000000..47e7b596a6f
--- /dev/null
+++ b/arch/powerpc/cpu/mpc5xxx/loadtask.c
@@ -0,0 +1,76 @@
+/*
+ * (C) Copyright 2003
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * This file is based on code
+ * (C) Copyright Motorola, Inc., 2000
+ */
+
+#include <common.h>
+#include <mpc5xxx.h>
+
+/* BestComm/SmartComm microcode */
+extern int taskTable;
+
+void loadtask(int basetask, int tasks)
+{
+	int *sram = (int *)MPC5XXX_SRAM;
+	int *task_org = &taskTable;
+	unsigned int start, offset, end;
+	int i;
+
+#ifdef DEBUG
+	printf("basetask = %d, tasks = %d\n", basetask, tasks);
+	printf("task_org = 0x%08x\n", (unsigned int)task_org);
+#endif
+
+	/* setup TaskBAR register */
+	*(vu_long *)MPC5XXX_SDMA = MPC5XXX_SRAM;
+
+	/* relocate task table entries */
+	offset = (unsigned int)sram;
+	for (i = basetask; i < basetask + tasks; i++) {
+		sram[i * 8 + 0] = task_org[i * 8 + 0] + offset;
+		sram[i * 8 + 1] = task_org[i * 8 + 1] + offset;
+		sram[i * 8 + 2] = task_org[i * 8 + 2] + offset;
+		sram[i * 8 + 3] = task_org[i * 8 + 3] + offset;
+		sram[i * 8 + 4] = task_org[i * 8 + 4];
+		sram[i * 8 + 5] = task_org[i * 8 + 5];
+		sram[i * 8 + 6] = task_org[i * 8 + 6] + offset;
+		sram[i * 8 + 7] = task_org[i * 8 + 7];
+	}
+
+	/* relocate task descriptors */
+	start = (sram[basetask * 8] - (unsigned int)sram);
+	end = (sram[(basetask + tasks - 1) * 8 + 1] - (unsigned int)sram);
+
+#ifdef DEBUG
+	printf ("TDT start = 0x%08x, end = 0x%08x\n", start, end);
+#endif
+
+	start /= 4;
+	end /= 4;
+	for (i = start; i <= end; i++) {
+		sram[i] = task_org[i];
+	}
+
+	/* relocate variables */
+	start = (sram[basetask * 8 + 2] - (unsigned int)sram);
+	end = (sram[(basetask + tasks - 1) * 8 + 2] + 256 - (unsigned int)sram);
+	start /= 4;
+	end /= 4;
+	for (i = start; i < end; i++) {
+		sram[i] = task_org[i];
+	}
+
+	/* relocate function decriptors */
+	start = ((sram[basetask * 8 + 3] & 0xfffffffc) - (unsigned int)sram);
+	end = ((sram[(basetask + tasks - 1) * 8 + 3] & 0xfffffffc) + 256 - (unsigned int)sram);
+	start /= 4;
+	end /= 4;
+	for (i = start; i < end; i++) {
+		sram[i] = task_org[i];
+	}
+
+	asm volatile ("sync");
+}