patch-2.4.10 linux/arch/mips64/mips-boards/generic/init.c

• Lines: 153
• Date: Sun Sep 9 10:43:02 2001
• Orig file: v2.4.9/linux/arch/mips64/mips-boards/generic/init.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.9/linux/arch/mips64/mips-boards/generic/init.c linux/arch/mips64/mips-boards/generic/init.c
@@ -0,0 +1,152 @@
+/*
+ * Carsten Langgaard, carstenl@mips.com
+ * Copyright (C) 2000 MIPS Technologies, Inc.  All rights reserved.
+ *
+ * ########################################################################
+ *
+ *  This program is free software; you can distribute it and/or modify it
+ *  under the terms of the GNU General Public License (Version 2) as
+ *  published by the Free Software Foundation.
+ *
+ *  This program is distributed in the hope it will be useful, but WITHOUT
+ *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ *  for more details.
+ *
+ *  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.,
+ *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ *
+ * ########################################################################
+ *
+ * PROM library initialisation code.
+ */
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+
+#include <asm/io.h>
+#include <asm/mips-boards/prom.h>
+#include <asm/mips-boards/generic.h>
+#include <asm/mips-boards/gt64120.h>
+#include <asm/mips-boards/malta.h>
+
+/* Environment variable */
+typedef struct
+{
+    char *name;
+    char *val;
+}t_env_var;
+
+int prom_argc;
+int *_prom_argv, *_prom_envp;
+
+/*
+ * A 32-bit PROM pass arguments and environment as 32-bit pointer.
+ * This macro take care of sign extension.
+ */
+#define prom_envp(index) ((char *)(((int *)(int)_prom_envp)[(index)]))
+
+int init_debug = 0;
+
+char *prom_getenv(char *envname)
+{
+        /*
+	 * Return a pointer to the given environment variable.
+	 * We're using 64-bit pointers, but all pointers in the PROM 
+	 * structures are only 32-bit, so we need some workarounds.
+	 */
+	int i, index=0;
+
+	i = strlen(envname);
+
+	while(prom_envp(index)) {
+		if(strncmp(envname, prom_envp(index), i) == 0) {
+			return(prom_envp(index+1));
+		}
+		index += 2;
+	}
+
+	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;
+	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 get_ethernet_addr(char *ethernet_addr)
+{
+        char *ethaddr_str;
+
+        ethaddr_str = prom_getenv("ethaddr");
+	if (!ethaddr_str) {
+	        printk("ethaddr not set in boot prom\n");
+		return -1;
+	}
+	str2eaddr(ethernet_addr, ethaddr_str);
+
+	if (init_debug > 1)
+	{
+	        int i;
+		printk("get_ethernet_addr: ");
+	        for (i=0; i<5; i++)
+		        printk("%02x:", (unsigned char)*(ethernet_addr+i));
+		printk("%02x\n", *(ethernet_addr+i));
+	}
+
+	return 0;
+}
+
+int __init prom_init(int argc, char **argv, char **envp)
+{
+	prom_argc = argc;
+	_prom_argv = (int *)argv;
+	_prom_envp = (int *)envp;
+
+	mips_display_message("LINUX");
+
+	/*
+	 * Setup the North bridge to do Master byte-lane swapping when 
+	 * running in bigendian.
+	 */
+#if defined(__MIPSEL__)
+	GT_WRITE(GT_PCI0_CMD_OFS, GT_PCI0_CMD_MBYTESWAP_BIT |
+		 GT_PCI0_CMD_SBYTESWAP_BIT);
+#else
+	GT_WRITE(GT_PCI0_CMD_OFS, 0);
+#endif
+
+#if defined(CONFIG_MIPS_MALTA)
+	mips_io_port_base = MALTA_PORT_BASE;
+#else
+	mips_io_port_base = KSEG1;
+#endif
+
+	setup_prom_printf(0);
+	prom_printf("\nLINUX started...\n");
+	prom_init_cmdline();
+	prom_meminit();
+
+	return 0;
+}