MIPS: Loongson: Split the implementation of prom and setup parts

This patch split the old initilization and setup implementation to
several file, one file one logic function.

the other main changes include:

	1. as the script/checkpatch.pl suggests, use strict_strtol instead
	of simple_strtol in arch/mips/lemote/lm2e/cmdline.c

	2. use the existed macros in asm/mips-boards/bonito64.h as the
	arguments of set_io_port_base() and remove the un-needed ones in
	asm/mach-lemote/pci.h

Signed-off-by: Wu Zhangjin <wuzj@lemote.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/include/asm/mach-lemote/pci.h

@@ -25,6 +25,5 @@
 #define LOONGSON2E_PCI_MEM_START	0x14000000UL
 #define LOONGSON2E_PCI_MEM_END		0x1fffffffUL
 #define LOONGSON2E_PCI_IO_START		0x00004000UL
-#define LOONGSON2E_IO_PORT_BASE		0x1fd00000UL
 
 #endif /* !_LEMOTE_PCI_H_ */

arch/mips/lemote/lm2e/Makefile

@@ -2,7 +2,8 @@
 # Makefile for Lemote Fulong mini-PC board.
 #
 
-obj-y += setup.o prom.o reset.o irq.o pci.o bonito-irq.o mem.o
+obj-y += setup.o init.o reset.o irq.o pci.o bonito-irq.o mem.o \
+		env.o cmdline.o time.o machtype.o
 
 #
 # Early printk support

arch/mips/lemote/lm2e/cmdline.c

@@ -9,83 +9,45 @@
  * Copyright (C) 2007 Lemote Inc. & Insititute of Computing Technology
  * Author: Fuxin Zhang, zhangfx@lemote.com
  *
+ * Copyright (C) 2009 Lemote Inc. & Insititute of Computing Technology
+ * Author: Wu Zhangjin, wuzj@lemote.com
+ *
  * 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 <linux/io.h>
 #include <linux/init.h>
-#include <linux/bootmem.h>
+
 #include <asm/bootinfo.h>
 
-extern unsigned long bus_clock;
+int prom_argc;
-extern unsigned long cpu_clock_freq;
-extern unsigned int memsize, highmemsize;
-
-static int argc;
 /* pmon passes arguments in 32bit pointers */
-static int *arg;
+int *_prom_argv;
-static int *env;
-
-const char *get_system_type(void)
-{
-	return "lemote-fulong";
-}
 
 void __init prom_init_cmdline(void)
 {
 	int i;
 	long l;
 
+	/* firmware arguments are initialized in head.S */
+	prom_argc = fw_arg0;
+	_prom_argv = (int *)fw_arg1;
+
 	/* arg[0] is "g", the rest is boot parameters */
 	arcs_cmdline[0] = '\0';
-	for (i = 1; i < argc; i++) {
+	for (i = 1; i < prom_argc; i++) {
-		l = (long)arg[i];
+		l = (long)_prom_argv[i];
 		if (strlen(arcs_cmdline) + strlen(((char *)l) + 1)
 		    >= sizeof(arcs_cmdline))
 			break;
 		strcat(arcs_cmdline, ((char *)l));
 		strcat(arcs_cmdline, " ");
 	}
-}
-
-void __init prom_init(void)
-{
-	long l;
-	argc = fw_arg0;
-	arg = (int *)fw_arg1;
-	env = (int *)fw_arg2;
-
-	prom_init_cmdline();
 
 	if ((strstr(arcs_cmdline, "console=")) == NULL)
 		strcat(arcs_cmdline, " console=ttyS0,115200");
 	if ((strstr(arcs_cmdline, "root=")) == NULL)
 		strcat(arcs_cmdline, " root=/dev/hda1");
-
-#define parse_even_earlier(res, option, p)				\
-do {									\
-	if (strncmp(option, (char *)p, strlen(option)) == 0)		\
-		res = simple_strtol((char *)p + strlen(option"="),	\
-				    NULL, 10);				\
-} while (0)
-
-	l = (long)*env;
-	while (l != 0) {
-		parse_even_earlier(bus_clock, "busclock", l);
-		parse_even_earlier(cpu_clock_freq, "cpuclock", l);
-		parse_even_earlier(memsize, "memsize", l);
-		parse_even_earlier(highmemsize, "highmemsize", l);
-		env++;
-		l = (long)*env;
-	}
-	if (memsize == 0)
-		memsize = 256;
-
-	pr_info("busclock=%ld, cpuclock=%ld,memsize=%d,highmemsize=%d\n",
-	       bus_clock, cpu_clock_freq, memsize, highmemsize);
-}
-
-void __init prom_free_prom_memory(void)
-{
 }

arch/mips/lemote/lm2e/env.c

@@ -0,0 +1,60 @@
+/*
+ * Based on Ocelot Linux port, which is
+ * Copyright 2001 MontaVista Software Inc.
+ * Author: jsun@mvista.com or jsun@junsun.net
+ *
+ * Copyright 2003 ICT CAS
+ * Author: Michael Guo <guoyi@ict.ac.cn>
+ *
+ * Copyright (C) 2007 Lemote Inc. & Insititute of Computing Technology
+ * Author: Fuxin Zhang, zhangfx@lemote.com
+ *
+ * Copyright (C) 2009 Lemote Inc. & Insititute of Computing Technology
+ * Author: Wu Zhangjin, wuzj@lemote.com
+ *
+ * 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 <linux/io.h>
+#include <linux/init.h>
+
+#include <asm/bootinfo.h>
+
+unsigned long bus_clock, cpu_clock_freq;
+unsigned long memsize, highmemsize;
+
+/* pmon passes arguments in 32bit pointers */
+int *_prom_envp;
+
+#define parse_even_earlier(res, option, p)				\
+do {									\
+	if (strncmp(option, (char *)p, strlen(option)) == 0)		\
+			strict_strtol((char *)p + strlen(option"="),	\
+					10, &res);			\
+} while (0)
+
+void __init prom_init_env(void)
+{
+	long l;
+
+	/* firmware arguments are initialized in head.S */
+	_prom_envp = (int *)fw_arg2;
+
+	l = (long)*_prom_envp;
+	while (l != 0) {
+		parse_even_earlier(bus_clock, "busclock", l);
+		parse_even_earlier(cpu_clock_freq, "cpuclock", l);
+		parse_even_earlier(memsize, "memsize", l);
+		parse_even_earlier(highmemsize, "highmemsize", l);
+		_prom_envp++;
+		l = (long)*_prom_envp;
+	}
+	if (memsize == 0)
+		memsize = 256;
+
+	pr_info("busclock=%ld, cpuclock=%ld, memsize=%ld, highmemsize=%ld\n",
+		bus_clock, cpu_clock_freq, memsize, highmemsize);
+}

arch/mips/lemote/lm2e/init.c

@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2009 Lemote Inc. & Insititute of Computing Technology
+ * Author: Wu Zhangjin, wuzj@lemote.com
+ *
+ * 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 <linux/init.h>
+#include <linux/bootmem.h>
+
+#include <asm/bootinfo.h>
+#include <asm/mips-boards/bonito64.h>
+
+extern void __init prom_init_cmdline(void);
+extern void __init prom_init_env(void);
+extern void __init prom_init_memory(void);
+
+void __init prom_init(void)
+{
+    /* init base address of io space */
+	set_io_port_base((unsigned long)
+		ioremap(BONITO_PCIIO_BASE, BONITO_PCIIO_SIZE));
+
+	prom_init_cmdline();
+	prom_init_env();
+	prom_init_memory();
+}
+
+void __init prom_free_prom_memory(void)
+{
+}

arch/mips/lemote/lm2e/machtype.c

@@ -0,0 +1,15 @@
+/*
+ * Copyright (C) 2009 Lemote Inc. & Insititute of Computing Technology
+ * Author: Wu Zhangjin, wuzj@lemote.com
+ *
+ * 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.
+ */
+
+const char *get_system_type(void)
+{
+	return "lemote-fulong";
+}
+

arch/mips/lemote/lm2e/mem.c

@@ -8,6 +8,19 @@
 #include <linux/fcntl.h>
 #include <linux/mm.h>
 
+#include <asm/bootinfo.h>
+
+extern unsigned long memsize, highmemsize;
+
+void __init prom_init_memory(void)
+{
+    add_memory_region(0x0, (memsize << 20), BOOT_MEM_RAM);
+#ifdef CONFIG_64BIT
+    if (highmemsize > 0)
+		add_memory_region(0x20000000, highmemsize << 20, BOOT_MEM_RAM);
+#endif /* CONFIG_64BIT */
+}
+
 /* override of arch/mips/mm/cache.c: __uncached_access */
 int __uncached_access(struct file *file, unsigned long addr)
 {

arch/mips/lemote/lm2e/setup.c

@@ -26,37 +26,16 @@
  *  675 Mass Ave, Cambridge, MA 02139, USA.
  *
  */
-#include <linux/bootmem.h>
 #include <linux/init.h>
-#include <linux/irq.h>
+#include <linux/module.h>
 
-#include <asm/bootinfo.h>
-#include <asm/mc146818-time.h>
-#include <asm/time.h>
 #include <asm/wbflush.h>
-#include <asm/mach-lemote/pci.h>
 
 #ifdef CONFIG_VT
 #include <linux/console.h>
 #include <linux/screen_info.h>
 #endif
 
-unsigned long cpu_clock_freq;
-unsigned long bus_clock;
-unsigned int memsize;
-unsigned int highmemsize = 0;
-
-void __init plat_time_init(void)
-{
-	/* setup mips r4k timer */
-	mips_hpt_frequency = cpu_clock_freq / 2;
-}
-
-unsigned long read_persistent_clock(void)
-{
-	return mc146818_get_cmos_time();
-}
-
 void (*__wbflush)(void);
 EXPORT_SYMBOL(__wbflush);
 
@@ -73,18 +52,8 @@ static void wbflush_loongson2e(void)
 
 void __init plat_mem_setup(void)
 {
-	set_io_port_base((unsigned long)ioremap(LOONGSON2E_IO_PORT_BASE,
-				IO_SPACE_LIMIT - LOONGSON2E_PCI_IO_START + 1));
-
 	__wbflush = wbflush_loongson2e;
 
-	add_memory_region(0x0, (memsize << 20), BOOT_MEM_RAM);
-#ifdef CONFIG_64BIT
-	if (highmemsize > 0) {
-		add_memory_region(0x20000000, highmemsize << 20, BOOT_MEM_RAM);
-	}
-#endif
-
 #ifdef CONFIG_VT
 #if defined(CONFIG_VGA_CONSOLE)
 	conswitchp = &vga_con;
@@ -104,5 +73,4 @@ void __init plat_mem_setup(void)
 	conswitchp = &dummy_con;
 #endif
 #endif
-
 }

arch/mips/lemote/lm2e/time.c

@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2007 Lemote, Inc. & Institute of Computing Technology
+ * Author: Fuxin Zhang, zhangfx@lemote.com
+ *
+ * Copyright (C) 2009 Lemote Inc. & Insititute of Computing Technology
+ * Author: Wu Zhangjin, wuzj@lemote.com
+ *
+ *  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 <linux/init.h>
+
+#include <asm/mc146818-time.h>
+#include <asm/time.h>
+
+extern unsigned long cpu_clock_freq;
+
+void __init plat_time_init(void)
+{
+	/* setup mips r4k timer */
+	mips_hpt_frequency = cpu_clock_freq / 2;
+}
+
+unsigned long read_persistent_clock(void)
+{
+	return mc146818_get_cmos_time();
+}