v4.19.13 snapshot.
diff --git a/arch/powerpc/boot/wii.c b/arch/powerpc/boot/wii.c
new file mode 100644
index 0000000..2ebaec0
--- /dev/null
+++ b/arch/powerpc/boot/wii.c
@@ -0,0 +1,158 @@
+/*
+ * arch/powerpc/boot/wii.c
+ *
+ * Nintendo Wii bootwrapper support
+ * Copyright (C) 2008-2009 The GameCube Linux Team
+ * Copyright (C) 2008,2009 Albert Herranz
+ *
+ * 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 <stddef.h>
+#include "stdio.h"
+#include "types.h"
+#include "io.h"
+#include "ops.h"
+
+#include "ugecon.h"
+
+BSS_STACK(8192);
+
+#define HW_REG(x) ((void *)(x))
+
+#define EXI_CTRL HW_REG(0x0d800070)
+#define EXI_CTRL_ENABLE (1<<0)
+
+#define MEM2_TOP (0x10000000 + 64*1024*1024)
+#define FIRMWARE_DEFAULT_SIZE (12*1024*1024)
+
+
+struct mipc_infohdr {
+ char magic[3];
+ u8 version;
+ u32 mem2_boundary;
+ u32 ipc_in;
+ size_t ipc_in_size;
+ u32 ipc_out;
+ size_t ipc_out_size;
+};
+
+static int mipc_check_address(u32 pa)
+{
+ /* only MEM2 addresses */
+ if (pa < 0x10000000 || pa > 0x14000000)
+ return -EINVAL;
+ return 0;
+}
+
+static struct mipc_infohdr *mipc_get_infohdr(void)
+{
+ struct mipc_infohdr **hdrp, *hdr;
+
+ /* 'mini' header pointer is the last word of MEM2 memory */
+ hdrp = (struct mipc_infohdr **)0x13fffffc;
+ if (mipc_check_address((u32)hdrp)) {
+ printf("mini: invalid hdrp %08X\n", (u32)hdrp);
+ hdr = NULL;
+ goto out;
+ }
+
+ hdr = *hdrp;
+ if (mipc_check_address((u32)hdr)) {
+ printf("mini: invalid hdr %08X\n", (u32)hdr);
+ hdr = NULL;
+ goto out;
+ }
+ if (memcmp(hdr->magic, "IPC", 3)) {
+ printf("mini: invalid magic\n");
+ hdr = NULL;
+ goto out;
+ }
+
+out:
+ return hdr;
+}
+
+static int mipc_get_mem2_boundary(u32 *mem2_boundary)
+{
+ struct mipc_infohdr *hdr;
+ int error;
+
+ hdr = mipc_get_infohdr();
+ if (!hdr) {
+ error = -1;
+ goto out;
+ }
+
+ if (mipc_check_address(hdr->mem2_boundary)) {
+ printf("mini: invalid mem2_boundary %08X\n",
+ hdr->mem2_boundary);
+ error = -EINVAL;
+ goto out;
+ }
+ *mem2_boundary = hdr->mem2_boundary;
+ error = 0;
+out:
+ return error;
+
+}
+
+static void platform_fixups(void)
+{
+ void *mem;
+ u32 reg[4];
+ u32 mem2_boundary;
+ int len;
+ int error;
+
+ mem = finddevice("/memory");
+ if (!mem)
+ fatal("Can't find memory node\n");
+
+ /* two ranges of (address, size) words */
+ len = getprop(mem, "reg", reg, sizeof(reg));
+ if (len != sizeof(reg)) {
+ /* nothing to do */
+ goto out;
+ }
+
+ /* retrieve MEM2 boundary from 'mini' */
+ error = mipc_get_mem2_boundary(&mem2_boundary);
+ if (error) {
+ /* if that fails use a sane value */
+ mem2_boundary = MEM2_TOP - FIRMWARE_DEFAULT_SIZE;
+ }
+
+ if (mem2_boundary > reg[2] && mem2_boundary < reg[2] + reg[3]) {
+ reg[3] = mem2_boundary - reg[2];
+ printf("top of MEM2 @ %08X\n", reg[2] + reg[3]);
+ setprop(mem, "reg", reg, sizeof(reg));
+ }
+
+out:
+ return;
+}
+
+void platform_init(unsigned long r3, unsigned long r4, unsigned long r5)
+{
+ u32 heapsize = 24*1024*1024 - (u32)_end;
+
+ simple_alloc_init(_end, heapsize, 32, 64);
+ fdt_init(_dtb_start);
+
+ /*
+ * 'mini' boots the Broadway processor with EXI disabled.
+ * We need it enabled before probing for the USB Gecko.
+ */
+ out_be32(EXI_CTRL, in_be32(EXI_CTRL) | EXI_CTRL_ENABLE);
+
+ if (ug_probe())
+ console_ops.write = ug_console_write;
+
+ platform_ops.fixups = platform_fixups;
+}
+