v4.19.13 snapshot.
diff --git a/arch/mips/alchemy/common/prom.c b/arch/mips/alchemy/common/prom.c
new file mode 100644
index 0000000..af312b5
--- /dev/null
+++ b/arch/mips/alchemy/common/prom.c
@@ -0,0 +1,128 @@
+/*
+ *
+ * BRIEF MODULE DESCRIPTION
+ * PROM library initialisation code, supports YAMON and U-Boot.
+ *
+ * Copyright 2000-2001, 2006, 2008 MontaVista Software Inc.
+ * Author: MontaVista Software, Inc. <source@mvista.com>
+ *
+ * This file was derived from Carsten Langgaard's
+ * arch/mips/mips-boards/xx files.
+ *
+ * Carsten Langgaard, carstenl@mips.com
+ * Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved.
+ *
+ * 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 SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
+ * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * 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.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/init.h>
+#include <linux/string.h>
+
+#include <asm/bootinfo.h>
+
+int prom_argc;
+char **prom_argv;
+char **prom_envp;
+
+void __init prom_init_cmdline(void)
+{
+ int i;
+
+ for (i = 1; i < prom_argc; i++) {
+ strlcat(arcs_cmdline, prom_argv[i], COMMAND_LINE_SIZE);
+ if (i < (prom_argc - 1))
+ strlcat(arcs_cmdline, " ", COMMAND_LINE_SIZE);
+ }
+}
+
+char *prom_getenv(char *envname)
+{
+ /*
+ * Return a pointer to the given environment variable.
+ * YAMON uses "name", "value" pairs, while U-Boot uses "name=value".
+ */
+
+ char **env = prom_envp;
+ int i = strlen(envname);
+ int yamon = (*env && strchr(*env, '=') == NULL);
+
+ while (*env) {
+ if (yamon) {
+ if (strcmp(envname, *env++) == 0)
+ return *env;
+ } else if (strncmp(envname, *env, i) == 0 && (*env)[i] == '=')
+ return *env + i + 1;
+ env++;
+ }
+
+ return NULL;
+}
+
+static inline unsigned char str2hexnum(unsigned char c)
+{
+ if (c >= '0' && c <= '9')
+ return c - '0';
+ if (c >= 'a' && c <= 'f')
+ return c - 'a' + 10;
+ if (c >= 'A' && c <= 'F')
+ return c - 'A' + 10;
+
+ return 0; /* foo */
+}
+
+static inline void str2eaddr(unsigned char *ea, unsigned char *str)
+{
+ int i;
+
+ for (i = 0; i < 6; i++) {
+ unsigned char num;
+
+ if ((*str == '.') || (*str == ':'))
+ str++;
+ num = str2hexnum(*str++) << 4;
+ num |= str2hexnum(*str++);
+ ea[i] = num;
+ }
+}
+
+int __init prom_get_ethernet_addr(char *ethernet_addr)
+{
+ char *ethaddr_str;
+
+ /* Check the environment variables first */
+ ethaddr_str = prom_getenv("ethaddr");
+ if (!ethaddr_str) {
+ /* Check command line */
+ ethaddr_str = strstr(arcs_cmdline, "ethaddr=");
+ if (!ethaddr_str)
+ return -1;
+
+ ethaddr_str += strlen("ethaddr=");
+ }
+
+ str2eaddr(ethernet_addr, ethaddr_str);
+
+ return 0;
+}
+
+void __init prom_free_prom_memory(void)
+{
+}