patch-2.4.22 linux-2.4.22/arch/sh64/kernel/setup.c

• Lines: 363
• Date: 2003-08-25 04:44:40.000000000 -0700
• Orig file: linux-2.4.21/arch/sh64/kernel/setup.c
• Orig date: 1969-12-31 16:00:00.000000000 -0800

diff -urN linux-2.4.21/arch/sh64/kernel/setup.c linux-2.4.22/arch/sh64/kernel/setup.c
@@ -0,0 +1,362 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * arch/sh64/kernel/setup.c
+ *
+ * SH-5 Arch Support
+ *
+ * This file handles the architecture-dependent parts of initialization
+ *
+ * Copyright (C) 2000, 2001  Paolo Alberelli
+ *
+ * benedict.gaster@superh.com:   2nd May 2002
+ *    Modified to use the empty_zero_page to pass command line arguments.
+ *
+ * benedict.gaster@superh.com:	 3rd May 2002
+ *    Added support for ramdisk, removing statically linked romfs at the same time.
+ *
+ * lethal@linux-sh.org:          15th May 2003
+ *    Added generic procfs cpuinfo reporting. Make boards just export their name.
+ *
+ * lethal@linux-sh.org:          25th May 2003
+ *    Added generic get_cpu_subtype() for subtype reporting from cpu_data->type.
+ *
+ */
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/stddef.h>
+#include <linux/unistd.h>
+#include <linux/ptrace.h>
+#include <linux/slab.h>
+#include <linux/user.h>
+#include <linux/a.out.h>
+#include <linux/tty.h>
+#include <linux/ioport.h>
+#include <linux/delay.h>
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/seq_file.h>
+#ifdef CONFIG_BLK_DEV_RAM
+#include <linux/blk.h>
+#endif
+#include <linux/bootmem.h>
+#include <linux/console.h>
+#include <asm/processor.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/platform.h>
+#include <asm/uaccess.h>
+#include <asm/system.h>
+#include <asm/io.h>
+#include <asm/smp.h>
+
+#ifdef CONFIG_VT
+#include <linux/console.h>
+#endif
+
+struct screen_info screen_info;
+
+/* On a PC this would be initialised as a result of the BIOS detecting the
+ * mouse. */
+unsigned char aux_device_present = 0xaa;
+
+#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
+
+extern int root_mountflags;
+extern int _text, _etext, _edata, _end;
+extern char *get_system_type(void);
+extern void platform_setup(void);
+extern void platform_monitor(void);
+extern void platform_reserve(void);
+extern int sh64_cache_init(void);
+extern int sh64_tlb_init(void);
+
+#define RAMDISK_IMAGE_START_MASK  	0x07FF
+#define RAMDISK_PROMPT_FLAG		0x8000
+#define RAMDISK_LOAD_FLAG		0x4000	
+
+#define PARAM ((unsigned char *)empty_zero_page)
+#define MOUNT_ROOT_RDONLY (*(unsigned long *) (PARAM+0x000))
+#define RAMDISK_FLAGS (*(unsigned long *) (PARAM+0x004))
+#define ORIG_ROOT_DEV (*(unsigned long *) (PARAM+0x008))
+#define LOADER_TYPE (*(unsigned long *) (PARAM+0x00c))
+#define INITRD_START (*(unsigned long *) (PARAM+0x010))
+#define INITRD_SIZE (*(unsigned long *) (PARAM+0x014))
+
+#define COMMAND_LINE ((char *) (PARAM+256))
+#define COMMAND_LINE_SIZE 256	
+
+static char command_line[COMMAND_LINE_SIZE] = { 0, };
+       char saved_command_line[COMMAND_LINE_SIZE];
+unsigned long long memory_start = CONFIG_MEMORY_START;
+unsigned long long memory_end = CONFIG_MEMORY_START + (CONFIG_MEMORY_SIZE_IN_MB * 1024 * 1024);
+
+struct sh_cpuinfo boot_cpu_data = { 
+	.type = CPU_SH5_101,
+};
+
+static inline void parse_mem_cmdline (char ** cmdline_p)
+{
+        char c = ' ', *to = command_line, *from = COMMAND_LINE;
+	int len = 0;
+
+	/* Save unparsed command line copy for /proc/cmdline */
+	memcpy(saved_command_line, COMMAND_LINE, COMMAND_LINE_SIZE);
+	saved_command_line[COMMAND_LINE_SIZE-1] = '\0';
+
+	for (;;) {
+	  /*
+	   * "mem=XXX[kKmM]" defines a size of memory.
+	   */
+	        if (c == ' ' && !memcmp(from, "mem=", 4)) {
+		      if (to != command_line)
+			to--;
+		      {
+			unsigned long mem_size;
+			
+			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;
+}
+
+void cpu_relax(void)
+{
+}
+
+void __init setup_arch(char **cmdline_p)
+{
+	unsigned long bootmap_size, i;
+	unsigned long first_pfn, start_pfn, last_pfn, pages;
+
+	/*
+	 * Setup TLB mappings
+	 */
+	sh64_tlb_init();
+
+	/*
+	 * Caches are already initialized by the time we get here, so we just
+	 * fill in cpu_data info for the caches.
+	 */
+	sh64_cache_init();
+
+	platform_setup();
+	platform_monitor();
+
+	ROOT_DEV = to_kdev_t(ORIG_ROOT_DEV);
+
+#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;
+	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 = __pa(&_text);
+	code_resource.end = __pa(&_etext)-1;
+	data_resource.start = __pa(&_etext);
+	data_resource.end = __pa(&_edata)-1;
+
+	parse_mem_cmdline(cmdline_p);
+
+	/*
+	 * Find the lowest and highest page frame numbers we have available
+	 */
+	first_pfn = PFN_DOWN(memory_start);
+	last_pfn = PFN_DOWN(memory_end);
+	pages = last_pfn - first_pfn;
+
+ 	/*
+	 * Partially used pages are not usable - thus
+	 * we are rounding upwards:
+ 	 */
+	start_pfn = PFN_UP(__pa(&_end));
+	/*
+	 * Find a proper area for the bootmem bitmap. After this
+	 * bootstrap step all allocations (until the page allocator
+	 * is intact) must be done via bootmem_alloc().
+	 */
+	bootmap_size = init_bootmem_node(NODE_DATA(0), start_pfn,
+					 first_pfn, 
+					 last_pfn);
+        /*
+         * Round it up.
+         */
+        bootmap_size = PFN_PHYS(PFN_UP(bootmap_size));
+
+	/*
+	 * Register fully available RAM pages with the bootmem allocator.
+	 */
+	free_bootmem(PFN_PHYS(first_pfn), PFN_PHYS(pages));
+
+	/*
+	 * Reserve all kernel sections + bootmem bitmap + a guard page.
+	 */
+	reserve_bootmem(PFN_PHYS(first_pfn),
+		        (PFN_PHYS(start_pfn) + bootmap_size + PAGE_SIZE) - PFN_PHYS(first_pfn));
+
+	/*
+	 * Reserve platform dependent sections
+	 */
+	platform_reserve();
+
+#ifdef CONFIG_BLK_DEV_INITRD
+	if (LOADER_TYPE && INITRD_START) {
+		if (INITRD_START + INITRD_SIZE <= (PFN_PHYS(last_pfn))) {
+		        reserve_bootmem(INITRD_START + __MEMORY_START, INITRD_SIZE);
+
+			initrd_start =
+			  (long) INITRD_START ? INITRD_START + PAGE_OFFSET +  __MEMORY_START : 0;
+
+			initrd_end = initrd_start + INITRD_SIZE;
+		} else {
+			printk("initrd extends beyond end of memory "
+			    "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
+				    (long) INITRD_START + INITRD_SIZE,
+				    PFN_PHYS(last_pfn));
+			initrd_start = 0;
+		}
+	}
+#endif
+
+	/*
+	 * Claim all RAM, ROM, and I/O resources.
+	 */
+
+	/* Kernel RAM */
+	request_resource(&iomem_resource, &code_resource);
+	request_resource(&iomem_resource, &data_resource);
+
+	/* Other KRAM space */
+	for (i = 0; i < STANDARD_KRAM_RESOURCES - 2; i++)
+		request_resource(&iomem_resource,
+				 &platform_parms.kram_res_p[i]);
+
+	/* XRAM space */
+	for (i = 0; i < STANDARD_XRAM_RESOURCES; i++)
+		request_resource(&iomem_resource,
+				 &platform_parms.xram_res_p[i]);
+
+	/* ROM space */
+	for (i = 0; i < STANDARD_ROM_RESOURCES; i++)
+		request_resource(&iomem_resource,
+				 &platform_parms.rom_res_p[i]);
+
+	/* I/O space */
+	for (i = 0; i < STANDARD_IO_RESOURCES; i++)
+		request_resource(&ioport_resource,
+				 &platform_parms.io_res_p[i]);
+
+
+#ifdef CONFIG_VT
+#if defined(CONFIG_VGA_CONSOLE)
+	conswitchp = &vga_con;
+#elif defined(CONFIG_DUMMY_CONSOLE)
+	conswitchp = &dummy_con;
+#endif
+#endif
+
+	printk("Hardware FPU: %s\n", fpu_in_use ? "enabled" : "disabled");
+
+	paging_init();
+}
+
+void __xchg_called_with_bad_pointer(void)
+{
+	printk(KERN_EMERG "xchg() called with bad pointer !\n");
+}
+
+/*
+ *	Get CPU information
+ */
+static const char *cpu_name[] = {
+	[CPU_SH5_101]	"SH5-101",
+	[CPU_SH5_103]	"SH5-103",
+	[CPU_SH_NONE]	"Unknown",
+};
+
+const char *get_cpu_subtype(void)
+{
+	return cpu_name[boot_cpu_data.type];
+}
+
+#ifdef CONFIG_PROC_FS
+static int show_cpuinfo(struct seq_file *m,void *v)
+{
+	unsigned int cpu = smp_processor_id();
+
+	if (!cpu)
+		seq_printf(m, "machine\t\t: %s\n", get_system_type());
+
+	seq_printf(m, "processor\t: %d\n", cpu);
+	seq_printf(m, "cpu family\t: SH-5\n");
+	seq_printf(m, "cpu type\t: %s\n", get_cpu_subtype());
+
+	seq_printf(m, "icache size\t: %dK-bytes\n",
+		   (boot_cpu_data.icache.ways *
+		    boot_cpu_data.icache.sets *
+		    boot_cpu_data.icache.linesz) >> 10);
+	seq_printf(m, "dcache size\t: %dK-bytes\n",
+		   (boot_cpu_data.dcache.ways *
+		    boot_cpu_data.dcache.sets *
+		    boot_cpu_data.dcache.linesz) >> 10);
+	seq_printf(m, "itlb entries\t: %d\n", boot_cpu_data.itlb.entries);
+	seq_printf(m, "dtlb entries\t: %d\n", boot_cpu_data.dtlb.entries);
+
+#define PRINT_CLOCK(name, value) \
+	seq_printf(m, name " clock\t: %d.%02dMHz\n", \
+		     ((value) / 1000000), ((value) % 1000000)/10000)
+	
+	PRINT_CLOCK("cpu", boot_cpu_data.cpu_clock);
+	PRINT_CLOCK("bus", boot_cpu_data.bus_clock);
+	PRINT_CLOCK("module", boot_cpu_data.module_clock);
+
+        seq_printf(m, "bogomips\t: %lu.%02lu\n\n",
+		     (loops_per_jiffy*HZ+2500)/500000,
+		     ((loops_per_jiffy*HZ+2500)/5000) % 100);
+
+	return 0;
+}
+
+static void *c_start(struct seq_file *m, loff_t *pos)
+{
+	return (void*)(*pos == 0);
+}
+static void *c_next(struct seq_file *m, void *v, loff_t *pos)
+{
+	return NULL;
+}
+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 */