Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / powerpc / boot / treeboot-currituck.c

diff --git a/kernel/arch/powerpc/boot/treeboot-currituck.c b/kernel/arch/powerpc/boot/treeboot-currituck.c
new file mode 100644 (file)
index 0000000..925ae43
--- /dev/null
+++ b/kernel/arch/powerpc/boot/treeboot-currituck.c
@@ -0,0 +1,119 @@
+/*
+ * Copyright © 2011 Tony Breeds IBM Corporation
+ *
+ * Based on earlier code:
+ *   Copyright (C) Paul Mackerras 1997.
+ *
+ *   Matt Porter <mporter@kernel.crashing.org>
+ *   Copyright 2002-2005 MontaVista Software Inc.
+ *
+ *   Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
+ *   Copyright (c) 2003, 2004 Zultys Technologies
+ *
+ *    Copyright 2007 David Gibson, IBM Corporation.
+ *    Copyright 2010 Ben. Herrenschmidt, IBM Corporation.
+ *    Copyright © 2011 David Kleikamp IBM Corporation
+ *
+ * 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.
+ */
+#include <stdarg.h>
+#include <stddef.h>
+#include "types.h"
+#include "elf.h"
+#include "string.h"
+#include "stdio.h"
+#include "page.h"
+#include "ops.h"
+#include "reg.h"
+#include "io.h"
+#include "dcr.h"
+#include "4xx.h"
+#include "44x.h"
+#include "libfdt.h"
+
+BSS_STACK(4096);
+
+#define MAX_RANKS      0x4
+#define DDR3_MR0CF     0x80010011U
+
+static unsigned long long ibm_currituck_memsize;
+static unsigned long long ibm_currituck_detect_memsize(void)
+{
+       u32 reg;
+       unsigned i;
+       unsigned long long memsize = 0;
+
+       for(i = 0; i < MAX_RANKS; i++){
+               reg = mfdcrx(DDR3_MR0CF + i);
+
+               if (!(reg & 1))
+                       continue;
+
+               reg &= 0x0000f000;
+               reg >>= 12;
+               memsize += (0x800000ULL << reg);
+       }
+
+       return memsize;
+}
+
+static void ibm_currituck_fixups(void)
+{
+       void *devp = finddevice("/");
+       u32 dma_ranges[7];
+
+       dt_fixup_memory(0x0ULL,  ibm_currituck_memsize);
+
+       while ((devp = find_node_by_devtype(devp, "pci"))) {
+               if (getprop(devp, "dma-ranges", dma_ranges, sizeof(dma_ranges)) < 0) {
+                       printf("%s: Failed to get dma-ranges\r\n", __func__);
+                       continue;
+               }
+
+               dma_ranges[5] = ibm_currituck_memsize >> 32;
+               dma_ranges[6] = ibm_currituck_memsize & 0xffffffffUL;
+
+               setprop(devp, "dma-ranges", dma_ranges, sizeof(dma_ranges));
+       }
+}
+
+#define SPRN_PIR       0x11E   /* Processor Indentification Register */
+void platform_init(void)
+{
+       unsigned long end_of_ram, avail_ram;
+       u32 pir_reg;
+       int node, size;
+       const u32 *timebase;
+
+       ibm_currituck_memsize = ibm_currituck_detect_memsize();
+       if (ibm_currituck_memsize >> 32)
+               end_of_ram = ~0UL;
+       else
+               end_of_ram = ibm_currituck_memsize;
+       avail_ram = end_of_ram - (unsigned long)_end;
+
+       simple_alloc_init(_end, avail_ram, 128, 64);
+       platform_ops.fixups = ibm_currituck_fixups;
+       platform_ops.exit = ibm44x_dbcr_reset;
+       pir_reg = mfspr(SPRN_PIR);
+
+       /* Make sure FDT blob is sane */
+       if (fdt_check_header(_dtb_start) != 0)
+               fatal("Invalid device tree blob\n");
+
+       node = fdt_node_offset_by_prop_value(_dtb_start, -1, "device_type",
+                                            "cpu", sizeof("cpu"));
+       if (!node)
+               fatal("Cannot find cpu node\n");
+       timebase = fdt_getprop(_dtb_start, node, "timebase-frequency", &size);
+       if (timebase && (size == 4))
+               timebase_period_ns = 1000000000 / *timebase;
+
+       fdt_set_boot_cpuid_phys(_dtb_start, pir_reg);
+       fdt_init(_dtb_start);
+
+       serial_console_init();
+}