| /* | 
 |  *  linux/arch/m32r/kernel/setup.c | 
 |  * | 
 |  *  Setup routines for Renesas M32R | 
 |  * | 
 |  *  Copyright (c) 2001, 2002  Hiroyuki Kondo, Hirokazu Takata, | 
 |  *                            Hitoshi Yamamoto | 
 |  */ | 
 |  | 
 | #include <linux/init.h> | 
 | #include <linux/kernel.h> | 
 | #include <linux/stddef.h> | 
 | #include <linux/fs.h> | 
 | #include <linux/sched.h> | 
 | #include <linux/ioport.h> | 
 | #include <linux/mm.h> | 
 | #include <linux/bootmem.h> | 
 | #include <linux/console.h> | 
 | #include <linux/initrd.h> | 
 | #include <linux/major.h> | 
 | #include <linux/root_dev.h> | 
 | #include <linux/seq_file.h> | 
 | #include <linux/timex.h> | 
 | #include <linux/screen_info.h> | 
 | #include <linux/cpu.h> | 
 | #include <linux/nodemask.h> | 
 | #include <linux/pfn.h> | 
 |  | 
 | #include <asm/processor.h> | 
 | #include <asm/pgtable.h> | 
 | #include <asm/io.h> | 
 | #include <asm/mmu_context.h> | 
 | #include <asm/m32r.h> | 
 | #include <asm/setup.h> | 
 | #include <asm/sections.h> | 
 |  | 
 | #ifdef CONFIG_MMU | 
 | extern void init_mmu(void); | 
 | #endif | 
 |  | 
 | extern char _end[]; | 
 |  | 
 | /* | 
 |  * Machine setup.. | 
 |  */ | 
 | struct cpuinfo_m32r boot_cpu_data; | 
 |  | 
 | #ifdef CONFIG_BLK_DEV_RAM | 
 | extern int rd_doload;	/* 1 = load ramdisk, 0 = don't load */ | 
 | extern int rd_prompt;	/* 1 = prompt for ramdisk, 0 = don't prompt */ | 
 | extern int rd_image_start;	/* starting block # of image */ | 
 | #endif | 
 |  | 
 | #if defined(CONFIG_VGA_CONSOLE) | 
 | struct screen_info screen_info = { | 
 | 	.orig_video_lines      = 25, | 
 | 	.orig_video_cols       = 80, | 
 | 	.orig_video_mode       = 0, | 
 | 	.orig_video_ega_bx     = 0, | 
 | 	.orig_video_isVGA      = 1, | 
 | 	.orig_video_points     = 8 | 
 | }; | 
 | #endif | 
 |  | 
 | extern int root_mountflags; | 
 |  | 
 | static char __initdata command_line[COMMAND_LINE_SIZE]; | 
 |  | 
 | static struct resource data_resource = { | 
 | 	.name   = "Kernel data", | 
 | 	.start  = 0, | 
 | 	.end    = 0, | 
 | 	.flags  = IORESOURCE_BUSY | IORESOURCE_MEM | 
 | }; | 
 |  | 
 | static struct resource code_resource = { | 
 | 	.name   = "Kernel code", | 
 | 	.start  = 0, | 
 | 	.end    = 0, | 
 | 	.flags  = IORESOURCE_BUSY | IORESOURCE_MEM | 
 | }; | 
 |  | 
 | unsigned long memory_start; | 
 | unsigned long memory_end; | 
 |  | 
 | void __init setup_arch(char **); | 
 | int get_cpuinfo(char *); | 
 |  | 
 | static __inline__ void parse_mem_cmdline(char ** cmdline_p) | 
 | { | 
 | 	char c = ' '; | 
 | 	char *to = command_line; | 
 | 	char *from = COMMAND_LINE; | 
 | 	int len = 0; | 
 | 	int usermem = 0; | 
 |  | 
 | 	/* Save unparsed command line copy for /proc/cmdline */ | 
 | 	memcpy(boot_command_line, COMMAND_LINE, COMMAND_LINE_SIZE); | 
 | 	boot_command_line[COMMAND_LINE_SIZE-1] = '\0'; | 
 |  | 
 | 	memory_start = (unsigned long)CONFIG_MEMORY_START+PAGE_OFFSET; | 
 | 	memory_end = memory_start+(unsigned long)CONFIG_MEMORY_SIZE; | 
 |  | 
 | 	for ( ; ; ) { | 
 | 		if (c == ' ' && !memcmp(from, "mem=", 4)) { | 
 | 			if (to != command_line) | 
 | 				to--; | 
 |  | 
 | 			{ | 
 | 				unsigned long mem_size; | 
 |  | 
 | 				usermem = 1; | 
 | 				mem_size = memparse(from+4, &from); | 
 | 				memory_end = memory_start + mem_size; | 
 | 			} | 
 | 		} | 
 | 		c = *(from++); | 
 | 		if (!c) | 
 | 			break; | 
 |  | 
 | 		if (COMMAND_LINE_SIZE <= ++len) | 
 | 			break; | 
 |  | 
 | 		*(to++) = c; | 
 | 	} | 
 | 	*to = '\0'; | 
 | 	*cmdline_p = command_line; | 
 | 	if (usermem) | 
 | 		printk(KERN_INFO "user-defined physical RAM map:\n"); | 
 | } | 
 |  | 
 | #ifndef CONFIG_DISCONTIGMEM | 
 | static unsigned long __init setup_memory(void) | 
 | { | 
 | 	unsigned long start_pfn, max_low_pfn, bootmap_size; | 
 |  | 
 | 	start_pfn = PFN_UP( __pa(_end) ); | 
 | 	max_low_pfn = PFN_DOWN( __pa(memory_end) ); | 
 |  | 
 | 	/* | 
 | 	 * Initialize the boot-time allocator (with low memory only): | 
 | 	 */ | 
 | 	bootmap_size = init_bootmem_node(NODE_DATA(0), start_pfn, | 
 | 		CONFIG_MEMORY_START>>PAGE_SHIFT, max_low_pfn); | 
 |  | 
 | 	/* | 
 | 	 * Register fully available low RAM pages with the bootmem allocator. | 
 | 	 */ | 
 | 	{ | 
 | 		unsigned long curr_pfn; | 
 | 		unsigned long last_pfn; | 
 | 		unsigned long pages; | 
 |  | 
 | 		/* | 
 | 		 * We are rounding up the start address of usable memory: | 
 | 		 */ | 
 | 		curr_pfn = PFN_UP(__pa(memory_start)); | 
 |  | 
 | 		/* | 
 | 		 * ... and at the end of the usable range downwards: | 
 | 		 */ | 
 | 		last_pfn = PFN_DOWN(__pa(memory_end)); | 
 |  | 
 | 		if (last_pfn > max_low_pfn) | 
 | 			last_pfn = max_low_pfn; | 
 |  | 
 | 		pages = last_pfn - curr_pfn; | 
 | 		free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(pages)); | 
 | 	} | 
 |  | 
 | 	/* | 
 | 	 * Reserve the kernel text and | 
 | 	 * Reserve the bootmem bitmap. We do this in two steps (first step | 
 | 	 * was init_bootmem()), because this catches the (definitely buggy) | 
 | 	 * case of us accidentally initializing the bootmem allocator with | 
 | 	 * an invalid RAM area. | 
 | 	 */ | 
 | 	reserve_bootmem(CONFIG_MEMORY_START + PAGE_SIZE, | 
 | 		(PFN_PHYS(start_pfn) + bootmap_size + PAGE_SIZE - 1) | 
 | 		- CONFIG_MEMORY_START); | 
 |  | 
 | 	/* | 
 | 	 * reserve physical page 0 - it's a special BIOS page on many boxes, | 
 | 	 * enabling clean reboots, SMP operation, laptop functions. | 
 | 	 */ | 
 | 	reserve_bootmem(CONFIG_MEMORY_START, PAGE_SIZE); | 
 |  | 
 | 	/* | 
 | 	 * reserve memory hole | 
 | 	 */ | 
 | #ifdef CONFIG_MEMHOLE | 
 | 	reserve_bootmem(CONFIG_MEMHOLE_START, CONFIG_MEMHOLE_SIZE); | 
 | #endif | 
 |  | 
 | #ifdef CONFIG_BLK_DEV_INITRD | 
 | 	if (LOADER_TYPE && INITRD_START) { | 
 | 		if (INITRD_START + INITRD_SIZE <= (max_low_pfn << PAGE_SHIFT)) { | 
 | 			reserve_bootmem(INITRD_START, INITRD_SIZE); | 
 | 			initrd_start = INITRD_START + PAGE_OFFSET; | 
 | 			initrd_end = initrd_start + INITRD_SIZE; | 
 | 			printk("initrd:start[%08lx],size[%08lx]\n", | 
 | 				initrd_start, INITRD_SIZE); | 
 | 		} else { | 
 | 			printk("initrd extends beyond end of memory " | 
 | 				"(0x%08lx > 0x%08lx)\ndisabling initrd\n", | 
 | 				INITRD_START + INITRD_SIZE, | 
 | 				max_low_pfn << PAGE_SHIFT); | 
 |  | 
 | 			initrd_start = 0; | 
 | 		} | 
 | 	} | 
 | #endif | 
 |  | 
 | 	return max_low_pfn; | 
 | } | 
 | #else	/* CONFIG_DISCONTIGMEM */ | 
 | extern unsigned long setup_memory(void); | 
 | #endif	/* CONFIG_DISCONTIGMEM */ | 
 |  | 
 | void __init setup_arch(char **cmdline_p) | 
 | { | 
 | 	ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV); | 
 |  | 
 | 	boot_cpu_data.cpu_clock = M32R_CPUCLK; | 
 | 	boot_cpu_data.bus_clock = M32R_BUSCLK; | 
 | 	boot_cpu_data.timer_divide = M32R_TIMER_DIVIDE; | 
 |  | 
 | #ifdef CONFIG_BLK_DEV_RAM | 
 | 	rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK; | 
 | 	rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0); | 
 | 	rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0); | 
 | #endif | 
 |  | 
 | 	if (!MOUNT_ROOT_RDONLY) | 
 | 		root_mountflags &= ~MS_RDONLY; | 
 |  | 
 | #ifdef CONFIG_VT | 
 | #if defined(CONFIG_VGA_CONSOLE) | 
 | 	conswitchp = &vga_con; | 
 | #elif defined(CONFIG_DUMMY_CONSOLE) | 
 | 	conswitchp = &dummy_con; | 
 | #endif | 
 | #endif | 
 |  | 
 | #ifdef CONFIG_DISCONTIGMEM | 
 | 	nodes_clear(node_online_map); | 
 | 	node_set_online(0); | 
 | 	node_set_online(1); | 
 | #endif	/* CONFIG_DISCONTIGMEM */ | 
 |  | 
 | 	init_mm.start_code = (unsigned long) _text; | 
 | 	init_mm.end_code = (unsigned long) _etext; | 
 | 	init_mm.end_data = (unsigned long) _edata; | 
 | 	init_mm.brk = (unsigned long) _end; | 
 |  | 
 | 	code_resource.start = virt_to_phys(_text); | 
 | 	code_resource.end = virt_to_phys(_etext)-1; | 
 | 	data_resource.start = virt_to_phys(_etext); | 
 | 	data_resource.end = virt_to_phys(_edata)-1; | 
 |  | 
 | 	parse_mem_cmdline(cmdline_p); | 
 |  | 
 | 	setup_memory(); | 
 |  | 
 | 	paging_init(); | 
 | } | 
 |  | 
 | static struct cpu cpu_devices[NR_CPUS]; | 
 |  | 
 | static int __init topology_init(void) | 
 | { | 
 | 	int i; | 
 |  | 
 | 	for_each_present_cpu(i) | 
 | 		register_cpu(&cpu_devices[i], i); | 
 |  | 
 | 	return 0; | 
 | } | 
 |  | 
 | subsys_initcall(topology_init); | 
 |  | 
 | #ifdef CONFIG_PROC_FS | 
 | /* | 
 |  *	Get CPU information for use by the procfs. | 
 |  */ | 
 | static int show_cpuinfo(struct seq_file *m, void *v) | 
 | { | 
 | 	struct cpuinfo_m32r *c = v; | 
 | 	unsigned long cpu = c - cpu_data; | 
 |  | 
 | #ifdef CONFIG_SMP | 
 | 	if (!cpu_online(cpu)) | 
 | 		return 0; | 
 | #endif	/* CONFIG_SMP */ | 
 |  | 
 | 	seq_printf(m, "processor\t: %ld\n", cpu); | 
 |  | 
 | #if defined(CONFIG_CHIP_VDEC2) | 
 | 	seq_printf(m, "cpu family\t: VDEC2\n" | 
 | 		"cache size\t: Unknown\n"); | 
 | #elif defined(CONFIG_CHIP_M32700) | 
 | 	seq_printf(m,"cpu family\t: M32700\n" | 
 | 		"cache size\t: I-8KB/D-8KB\n"); | 
 | #elif defined(CONFIG_CHIP_M32102) | 
 | 	seq_printf(m,"cpu family\t: M32102\n" | 
 | 		"cache size\t: I-8KB\n"); | 
 | #elif defined(CONFIG_CHIP_OPSP) | 
 | 	seq_printf(m,"cpu family\t: OPSP\n" | 
 | 		"cache size\t: I-8KB/D-8KB\n"); | 
 | #elif defined(CONFIG_CHIP_MP) | 
 | 	seq_printf(m, "cpu family\t: M32R-MP\n" | 
 | 		"cache size\t: I-xxKB/D-xxKB\n"); | 
 | #elif  defined(CONFIG_CHIP_M32104) | 
 | 	seq_printf(m,"cpu family\t: M32104\n" | 
 | 		"cache size\t: I-8KB/D-8KB\n"); | 
 | #else | 
 | 	seq_printf(m, "cpu family\t: Unknown\n"); | 
 | #endif | 
 | 	seq_printf(m, "bogomips\t: %lu.%02lu\n", | 
 | 		c->loops_per_jiffy/(500000/HZ), | 
 | 		(c->loops_per_jiffy/(5000/HZ)) % 100); | 
 | #if defined(CONFIG_PLAT_MAPPI) | 
 | 	seq_printf(m, "Machine\t\t: Mappi Evaluation board\n"); | 
 | #elif defined(CONFIG_PLAT_MAPPI2) | 
 | 	seq_printf(m, "Machine\t\t: Mappi-II Evaluation board\n"); | 
 | #elif defined(CONFIG_PLAT_MAPPI3) | 
 | 	seq_printf(m, "Machine\t\t: Mappi-III Evaluation board\n"); | 
 | #elif defined(CONFIG_PLAT_M32700UT) | 
 | 	seq_printf(m, "Machine\t\t: M32700UT Evaluation board\n"); | 
 | #elif defined(CONFIG_PLAT_OPSPUT) | 
 | 	seq_printf(m, "Machine\t\t: OPSPUT Evaluation board\n"); | 
 | #elif defined(CONFIG_PLAT_USRV) | 
 | 	seq_printf(m, "Machine\t\t: uServer\n"); | 
 | #elif defined(CONFIG_PLAT_OAKS32R) | 
 | 	seq_printf(m, "Machine\t\t: OAKS32R\n"); | 
 | #elif  defined(CONFIG_PLAT_M32104UT) | 
 | 	seq_printf(m, "Machine\t\t: M3T-M32104UT uT Engine board\n"); | 
 | #else | 
 | 	seq_printf(m, "Machine\t\t: Unknown\n"); | 
 | #endif | 
 |  | 
 | #define PRINT_CLOCK(name, value)				\ | 
 | 	seq_printf(m, name " clock\t: %d.%02dMHz\n",		\ | 
 | 		((value) / 1000000), ((value) % 1000000)/10000) | 
 |  | 
 | 	PRINT_CLOCK("CPU", (int)c->cpu_clock); | 
 | 	PRINT_CLOCK("Bus", (int)c->bus_clock); | 
 |  | 
 | 	seq_printf(m, "\n"); | 
 |  | 
 | 	return 0; | 
 | } | 
 |  | 
 | static void *c_start(struct seq_file *m, loff_t *pos) | 
 | { | 
 | 	return *pos < NR_CPUS ? cpu_data + *pos : NULL; | 
 | } | 
 |  | 
 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) | 
 | { | 
 | 	++*pos; | 
 | 	return c_start(m, pos); | 
 | } | 
 |  | 
 | static void c_stop(struct seq_file *m, void *v) | 
 | { | 
 | } | 
 |  | 
 | struct seq_operations cpuinfo_op = { | 
 | 	.start = c_start, | 
 | 	.next = c_next, | 
 | 	.stop = c_stop, | 
 | 	.show = show_cpuinfo, | 
 | }; | 
 | #endif	/* CONFIG_PROC_FS */ | 
 |  | 
 | unsigned long cpu_initialized __initdata = 0; | 
 |  | 
 | /* | 
 |  * cpu_init() initializes state that is per-CPU. Some data is already | 
 |  * initialized (naturally) in the bootstrap process. | 
 |  * We reload them nevertheless, this function acts as a | 
 |  * 'CPU state barrier', nothing should get across. | 
 |  */ | 
 | #if defined(CONFIG_CHIP_VDEC2) || defined(CONFIG_CHIP_XNUX2)	\ | 
 | 	|| defined(CONFIG_CHIP_M32700) || defined(CONFIG_CHIP_M32102) \ | 
 | 	|| defined(CONFIG_CHIP_OPSP) || defined(CONFIG_CHIP_M32104) | 
 | void __init cpu_init (void) | 
 | { | 
 | 	int cpu_id = smp_processor_id(); | 
 |  | 
 | 	if (test_and_set_bit(cpu_id, &cpu_initialized)) { | 
 | 		printk(KERN_WARNING "CPU#%d already initialized!\n", cpu_id); | 
 | 		for ( ; ; ) | 
 | 			local_irq_enable(); | 
 | 	} | 
 | 	printk(KERN_INFO "Initializing CPU#%d\n", cpu_id); | 
 |  | 
 | 	/* Set up and load the per-CPU TSS and LDT */ | 
 | 	atomic_inc(&init_mm.mm_count); | 
 | 	current->active_mm = &init_mm; | 
 | 	if (current->mm) | 
 | 		BUG(); | 
 |  | 
 | 	/* Force FPU initialization */ | 
 | 	current_thread_info()->status = 0; | 
 | 	clear_used_math(); | 
 |  | 
 | #ifdef CONFIG_MMU | 
 | 	/* Set up MMU */ | 
 | 	init_mmu(); | 
 | #endif | 
 |  | 
 | 	/* Set up ICUIMASK */ | 
 | 	outl(0x00070000, M32R_ICU_IMASK_PORTL);		/* imask=111 */ | 
 | } | 
 | #endif	/* defined(CONFIG_CHIP_VDEC2) ... */ |