--- /dev/null
+/*
+ * 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
+ *
+ * sh64 Arch Support
+ *
+ * This file handles the architecture-dependent parts of initialization
+ *
+ * Copyright (C) 2000, 2001 Paolo Alberelli
+ * Copyright (C) 2003, 2004 Paul Mundt
+ *
+ * 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/rwsem.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>
+#include <linux/blkdev.h>
+#include <linux/bootmem.h>
+#include <linux/console.h>
+#include <linux/root_dev.h>
+#include <linux/cpu.h>
+#include <linux/initrd.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/sections.h>
+#include <asm/setup.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 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
+
+static char command_line[COMMAND_LINE_SIZE] = { 0, };
+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;
+
+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;
+}
+
+static void __init sh64_cpu_type_detect(void)
+{
+ extern unsigned long long peek_real_address_q(unsigned long long addr);
+ unsigned long long cir;
+ /* Do peeks in real mode to avoid having to set up a mapping for the
+ WPC registers. On SH5-101 cut2, such a mapping would be exposed to
+ an address translation erratum which would make it hard to set up
+ correctly. */
+ cir = peek_real_address_q(0x0d000008);
+
+ if ((cir & 0xffff) == 0x5103) {
+ boot_cpu_data.type = CPU_SH5_103;
+ } else if (((cir >> 32) & 0xffff) == 0x51e2) {
+ /* CPU.VCR aliased at CIR address on SH5-101 */
+ boot_cpu_data.type = CPU_SH5_101;
+ } else {
+ boot_cpu_data.type = CPU_SH_NONE;
+ }
+}
+
+void __init setup_arch(char **cmdline_p)
+{
+ unsigned long bootmap_size, i;
+ unsigned long first_pfn, start_pfn, last_pfn, pages;
+
+#ifdef CONFIG_EARLY_PRINTK
+ extern void enable_early_printk(void);
+
+ /*
+ * Setup Early SCIF console
+ */
+ enable_early_printk();
+#endif
+
+ /*
+ * 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();
+
+ sh64_cpu_type_detect();
+
+ ROOT_DEV = old_decode_dev(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_node(NODE_DATA(0), PFN_PHYS(first_pfn), PFN_PHYS(pages));
+
+ /*
+ * Reserve all kernel sections + bootmem bitmap + a guard page.
+ */
+ reserve_bootmem_node(NODE_DATA(0), 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_node(NODE_DATA(0), 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");
+}
+
+static struct cpu cpu[1];
+
+static int __init topology_init(void)
+{
+ return register_cpu(cpu, 0, NULL);
+}
+
+subsys_initcall(topology_init);
+
+/*
+ * 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 */
git://git.onelab.eu / linux-2.6.git / blobdiff