Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / powerpc / boot / redboot-8xx.c

diff --git a/kernel/arch/powerpc/boot/redboot-8xx.c b/kernel/arch/powerpc/boot/redboot-8xx.c
new file mode 100644 (file)
index 0000000..f7945ad
--- /dev/null
+++ b/kernel/arch/powerpc/boot/redboot-8xx.c
@@ -0,0 +1,58 @@
+/*
+ * RedBoot firmware support
+ *
+ * Author: Scott Wood <scottwood@freescale.com>
+ *
+ * Copyright (c) 2007 Freescale Semiconductor, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ */
+
+#include "ops.h"
+#include "stdio.h"
+#include "redboot.h"
+#include "fsl-soc.h"
+#include "io.h"
+
+static bd_t bd;
+BSS_STACK(4096);
+
+#define MHZ(x) ((x + 500000) / 1000000)
+
+static void platform_fixups(void)
+{
+       void *node;
+
+       dt_fixup_memory(bd.bi_memstart, bd.bi_memsize);
+       dt_fixup_mac_addresses(bd.bi_enetaddr);
+       dt_fixup_cpu_clocks(bd.bi_intfreq, bd.bi_busfreq / 16, bd.bi_busfreq);
+
+       node = finddevice("/soc/cpm/brg");
+       if (node) {
+               printf("BRG clock-frequency <- 0x%x (%dMHz)\r\n",
+                      bd.bi_busfreq, MHZ(bd.bi_busfreq));
+               setprop(node, "clock-frequency",  &bd.bi_busfreq, 4);
+       }
+}
+
+void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
+                   unsigned long r6, unsigned long r7)
+{
+       memcpy(&bd, (char *)r3, sizeof(bd));
+
+       if (bd.bi_tag != 0x42444944)
+               return;
+
+       simple_alloc_init(_end,
+                         bd.bi_memstart + bd.bi_memsize - (unsigned long)_end,
+                         32, 64);
+
+       fdt_init(_dtb_start);
+       serial_console_init();
+       platform_ops.fixups = platform_fixups;
+
+       loader_info.cmdline = (char *)bd.bi_cmdline;
+       loader_info.cmdline_len = strlen((char *)bd.bi_cmdline);
+}