1 files changed, 146 insertions, 0 deletions

diff --git a/arch/mips/alchemy/common/prom.c b/arch/mips/alchemy/common/prom.c
new file mode 100644
index 000000000000..18b310b475ca
--- /dev/null
+++ b/arch/mips/alchemy/common/prom.c
@@ -0,0 +1,146 @@
+/*
+ *
+ * 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/module.h>
+#include <linux/init.h>
+#include <linux/string.h>
+
+#include <asm/bootinfo.h>
+
+int prom_argc;
+char **prom_argv;
+char **prom_envp;
+
+char * __init_or_module prom_getcmdline(void)
+{
+        return &(arcs_cmdline[0]);
+}
+
+void prom_init_cmdline(void)
+{
+        char *cp;
+        int actr;
+
+        actr = 1; /* Always ignore argv[0] */
+
+        cp = &(arcs_cmdline[0]);
+        while (actr < prom_argc) {
+                strcpy(cp, prom_argv[actr]);
+                cp += strlen(prom_argv[actr]);
+                *cp++ = ' ';
+                actr++;
+        }
+        if (cp != &(arcs_cmdline[0])) /* get rid of trailing space */
+                --cp;
+        if (prom_argc > 1)
+                *cp = '\0';
+}
+
+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 prom_get_ethernet_addr(char *ethernet_addr)
+{
+        char *ethaddr_str;
+        char *argptr;
+
+        /* Check the environment variables first */
+        ethaddr_str = prom_getenv("ethaddr");
+        if (!ethaddr_str) {
+                /* Check command line */
+                argptr = prom_getcmdline();
+                ethaddr_str = strstr(argptr, "ethaddr=");
+                if (!ethaddr_str)
+                        return -1;
+
+                ethaddr_str += strlen("ethaddr=");
+        }
+
+        str2eaddr(ethernet_addr, ethaddr_str);
+
+        return 0;
+}
+EXPORT_SYMBOL(prom_get_ethernet_addr);
+
+void __init prom_free_prom_memory(void)
+{
+}