1 files changed, 571 insertions, 0 deletions

diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
new file mode 100644
index 000000000000..6018ca25aceb
--- /dev/null
+++ b/arch/mips/kernel/setup.c
@@ -0,0 +1,571 @@
+/*
+ * 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.
+ *
+ * Copyright (C) 1995 Linus Torvalds
+ * Copyright (C) 1995 Waldorf Electronics
+ * Copyright (C) 1994, 95, 96, 97, 98, 99, 2000, 01, 02, 03  Ralf Baechle
+ * Copyright (C) 1996 Stoned Elipot
+ * Copyright (C) 1999 Silicon Graphics, Inc.
+ * Copyright (C) 2000 2001, 2002  Maciej W. Rozycki
+ */
+#include <linux/config.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/stddef.h>
+#include <linux/string.h>
+#include <linux/unistd.h>
+#include <linux/slab.h>
+#include <linux/user.h>
+#include <linux/utsname.h>
+#include <linux/a.out.h>
+#include <linux/tty.h>
+#include <linux/bootmem.h>
+#include <linux/initrd.h>
+#include <linux/major.h>
+#include <linux/kdev_t.h>
+#include <linux/root_dev.h>
+#include <linux/highmem.h>
+#include <linux/console.h>
+
+#include <asm/addrspace.h>
+#include <asm/bootinfo.h>
+#include <asm/cpu.h>
+#include <asm/sections.h>
+#include <asm/setup.h>
+#include <asm/system.h>
+
+struct cpuinfo_mips cpu_data[NR_CPUS];
+
+EXPORT_SYMBOL(cpu_data);
+
+#ifdef CONFIG_VT
+struct screen_info screen_info;
+#endif
+
+/*
+ * Despite it's name this variable is even if we don't have PCI
+ */
+unsigned int PCI_DMA_BUS_IS_PHYS;
+
+EXPORT_SYMBOL(PCI_DMA_BUS_IS_PHYS);
+
+/*
+ * Setup information
+ *
+ * These are initialized so they are in the .data section
+ */
+unsigned long mips_machtype = MACH_UNKNOWN;
+unsigned long mips_machgroup = MACH_GROUP_UNKNOWN;
+
+EXPORT_SYMBOL(mips_machtype);
+EXPORT_SYMBOL(mips_machgroup);
+
+struct boot_mem_map boot_mem_map;
+
+static char command_line[CL_SIZE];
+       char arcs_cmdline[CL_SIZE]=CONFIG_CMDLINE;
+
+/*
+ * mips_io_port_base is the begin of the address space to which x86 style
+ * I/O ports are mapped.
+ */
+const unsigned long mips_io_port_base = -1;
+EXPORT_SYMBOL(mips_io_port_base);
+
+/*
+ * isa_slot_offset is the address where E(ISA) busaddress 0 is mapped
+ * for the processor.
+ */
+unsigned long isa_slot_offset;
+EXPORT_SYMBOL(isa_slot_offset);
+
+static struct resource code_resource = { .name = "Kernel code", };
+static struct resource data_resource = { .name = "Kernel data", };
+
+void __init add_memory_region(phys_t start, phys_t size, long type)
+{
+        int x = boot_mem_map.nr_map;
+        struct boot_mem_map_entry *prev = boot_mem_map.map + x - 1;
+
+        /*
+         * Try to merge with previous entry if any.  This is far less than
+         * perfect but is sufficient for most real world cases.
+         */
+        if (x && prev->addr + prev->size == start && prev->type == type) {
+                prev->size += size;
+                return;
+        }
+
+        if (x == BOOT_MEM_MAP_MAX) {
+                printk("Ooops! Too many entries in the memory map!\n");
+                return;
+        }
+
+        boot_mem_map.map[x].addr = start;
+        boot_mem_map.map[x].size = size;
+        boot_mem_map.map[x].type = type;
+        boot_mem_map.nr_map++;
+}
+
+static void __init print_memory_map(void)
+{
+        int i;
+        const int field = 2 * sizeof(unsigned long);
+
+        for (i = 0; i < boot_mem_map.nr_map; i++) {
+                printk(" memory: %0*Lx @ %0*Lx ",
+                       field, (unsigned long long) boot_mem_map.map[i].size,
+                       field, (unsigned long long) boot_mem_map.map[i].addr);
+
+                switch (boot_mem_map.map[i].type) {
+                case BOOT_MEM_RAM:
+                        printk("(usable)\n");
+                        break;
+                case BOOT_MEM_ROM_DATA:
+                        printk("(ROM data)\n");
+                        break;
+                case BOOT_MEM_RESERVED:
+                        printk("(reserved)\n");
+                        break;
+                default:
+                        printk("type %lu\n", boot_mem_map.map[i].type);
+                        break;
+                }
+        }
+}
+
+static inline void parse_cmdline_early(void)
+{
+        char c = ' ', *to = command_line, *from = saved_command_line;
+        unsigned long start_at, mem_size;
+        int len = 0;
+        int usermem = 0;
+
+        printk("Determined physical RAM map:\n");
+        print_memory_map();
+
+        for (;;) {
+                /*
+                 * "mem=XXX[kKmM]" defines a memory region from
+                 * 0 to <XXX>, overriding the determined size.
+                 * "mem=XXX[KkmM]@YYY[KkmM]" defines a memory region from
+                 * <YYY> to <YYY>+<XXX>, overriding the determined size.
+                 */
+                if (c == ' ' && !memcmp(from, "mem=", 4)) {
+                        if (to != command_line)
+                                to--;
+                        /*
+                         * If a user specifies memory size, we
+                         * blow away any automatically generated
+                         * size.
+                         */
+                        if (usermem == 0) {
+                                boot_mem_map.nr_map = 0;
+                                usermem = 1;
+                        }
+                        mem_size = memparse(from + 4, &from);
+                        if (*from == '@')
+                                start_at = memparse(from + 1, &from);
+                        else
+                                start_at = 0;
+                        add_memory_region(start_at, mem_size, BOOT_MEM_RAM);
+                }
+                c = *(from++);
+                if (!c)
+                        break;
+                if (CL_SIZE <= ++len)
+                        break;
+                *(to++) = c;
+        }
+        *to = '\0';
+
+        if (usermem) {
+                printk("User-defined physical RAM map:\n");
+                print_memory_map();
+        }
+}
+
+static inline int parse_rd_cmdline(unsigned long* rd_start, unsigned long* rd_end)
+{
+        /*
+         * "rd_start=0xNNNNNNNN" defines the memory address of an initrd
+         * "rd_size=0xNN" it's size
+         */
+        unsigned long start = 0;
+        unsigned long size = 0;
+        unsigned long end;
+        char cmd_line[CL_SIZE];
+        char *start_str;
+        char *size_str;
+        char *tmp;
+
+        strcpy(cmd_line, command_line);
+        *command_line = 0;
+        tmp = cmd_line;
+        /* Ignore "rd_start=" strings in other parameters. */
+        start_str = strstr(cmd_line, "rd_start=");
+        if (start_str && start_str != cmd_line && *(start_str - 1) != ' ')
+                start_str = strstr(start_str, " rd_start=");
+        while (start_str) {
+                if (start_str != cmd_line)
+                        strncat(command_line, tmp, start_str - tmp);
+                start = memparse(start_str + 9, &start_str);
+                tmp = start_str + 1;
+                start_str = strstr(start_str, " rd_start=");
+        }
+        if (*tmp)
+                strcat(command_line, tmp);
+
+        strcpy(cmd_line, command_line);
+        *command_line = 0;
+        tmp = cmd_line;
+        /* Ignore "rd_size" strings in other parameters. */
+        size_str = strstr(cmd_line, "rd_size=");
+        if (size_str && size_str != cmd_line && *(size_str - 1) != ' ')
+                size_str = strstr(size_str, " rd_size=");
+        while (size_str) {
+                if (size_str != cmd_line)
+                        strncat(command_line, tmp, size_str - tmp);
+                size = memparse(size_str + 8, &size_str);
+                tmp = size_str + 1;
+                size_str = strstr(size_str, " rd_size=");
+        }
+        if (*tmp)
+                strcat(command_line, tmp);
+
+#ifdef CONFIG_MIPS64
+        /* HACK: Guess if the sign extension was forgotten */
+        if (start > 0x0000000080000000 && start < 0x00000000ffffffff)
+                start |= 0xffffffff00000000;
+#endif
+
+        end = start + size;
+        if (start && end) {
+                *rd_start = start;
+                *rd_end = end;
+                return 1;
+        }
+        return 0;
+}
+
+#define PFN_UP(x)       (((x) + PAGE_SIZE - 1) >> PAGE_SHIFT)
+#define PFN_DOWN(x)     ((x) >> PAGE_SHIFT)
+#define PFN_PHYS(x)     ((x) << PAGE_SHIFT)
+
+#define MAXMEM          HIGHMEM_START
+#define MAXMEM_PFN      PFN_DOWN(MAXMEM)
+
+static inline void bootmem_init(void)
+{
+        unsigned long start_pfn;
+        unsigned long reserved_end = (unsigned long)&_end;
+#ifndef CONFIG_SGI_IP27
+        unsigned long first_usable_pfn;
+        unsigned long bootmap_size;
+        int i;
+#endif
+#ifdef CONFIG_BLK_DEV_INITRD
+        int initrd_reserve_bootmem = 0;
+
+        /* Board specific code should have set up initrd_start and initrd_end */
+        ROOT_DEV = Root_RAM0;
+        if (parse_rd_cmdline(&initrd_start, &initrd_end)) {
+                reserved_end = max(reserved_end, initrd_end);
+                initrd_reserve_bootmem = 1;
+        } else {
+                unsigned long tmp;
+                u32 *initrd_header;
+
+                tmp = ((reserved_end + PAGE_SIZE-1) & PAGE_MASK) - sizeof(u32) * 2;
+                if (tmp < reserved_end)
+                        tmp += PAGE_SIZE;
+                initrd_header = (u32 *)tmp;
+                if (initrd_header[0] == 0x494E5244) {
+                        initrd_start = (unsigned long)&initrd_header[2];
+                        initrd_end = initrd_start + initrd_header[1];
+                        reserved_end = max(reserved_end, initrd_end);
+                        initrd_reserve_bootmem = 1;
+                }
+        }
+#endif  /* CONFIG_BLK_DEV_INITRD */
+
+        /*
+         * Partially used pages are not usable - thus
+         * we are rounding upwards.
+         */
+        start_pfn = PFN_UP(CPHYSADDR(reserved_end));
+
+#ifndef CONFIG_SGI_IP27
+        /* Find the highest page frame number we have available.  */
+        max_pfn = 0;
+        first_usable_pfn = -1UL;
+        for (i = 0; i < boot_mem_map.nr_map; i++) {
+                unsigned long start, end;
+
+                if (boot_mem_map.map[i].type != BOOT_MEM_RAM)
+                        continue;
+
+                start = PFN_UP(boot_mem_map.map[i].addr);
+                end = PFN_DOWN(boot_mem_map.map[i].addr
+                      + boot_mem_map.map[i].size);
+
+                if (start >= end)
+                        continue;
+                if (end > max_pfn)
+                        max_pfn = end;
+                if (start < first_usable_pfn) {
+                        if (start > start_pfn) {
+                                first_usable_pfn = start;
+                        } else if (end > start_pfn) {
+                                first_usable_pfn = start_pfn;
+                        }
+                }
+        }
+
+        /*
+         * Determine low and high memory ranges
+         */
+        max_low_pfn = max_pfn;
+        if (max_low_pfn > MAXMEM_PFN) {
+                max_low_pfn = MAXMEM_PFN;
+#ifndef CONFIG_HIGHMEM
+                /* Maximum memory usable is what is directly addressable */
+                printk(KERN_WARNING "Warning only %ldMB will be used.\n",
+                       MAXMEM >> 20);
+                printk(KERN_WARNING "Use a HIGHMEM enabled kernel.\n");
+#endif
+        }
+
+#ifdef CONFIG_HIGHMEM
+        /*
+         * Crude, we really should make a better attempt at detecting
+         * highstart_pfn
+         */
+        highstart_pfn = highend_pfn = max_pfn;
+        if (max_pfn > MAXMEM_PFN) {
+                highstart_pfn = MAXMEM_PFN;
+                printk(KERN_NOTICE "%ldMB HIGHMEM available.\n",
+                       (highend_pfn - highstart_pfn) >> (20 - PAGE_SHIFT));
+        }
+#endif
+
+        /* Initialize the boot-time allocator with low memory only.  */
+        bootmap_size = init_bootmem(first_usable_pfn, max_low_pfn);
+
+        /*
+         * Register fully available low RAM pages with the bootmem allocator.
+         */
+        for (i = 0; i < boot_mem_map.nr_map; i++) {
+                unsigned long curr_pfn, last_pfn, size;
+
+                /*
+                 * Reserve usable memory.
+                 */
+                if (boot_mem_map.map[i].type != BOOT_MEM_RAM)
+                        continue;
+
+                /*
+                 * We are rounding up the start address of usable memory:
+                 */
+                curr_pfn = PFN_UP(boot_mem_map.map[i].addr);
+                if (curr_pfn >= max_low_pfn)
+                        continue;
+                if (curr_pfn < start_pfn)
+                        curr_pfn = start_pfn;
+
+                /*
+                 * ... and at the end of the usable range downwards:
+                 */
+                last_pfn = PFN_DOWN(boot_mem_map.map[i].addr
+                                    + boot_mem_map.map[i].size);
+
+                if (last_pfn > max_low_pfn)
+                        last_pfn = max_low_pfn;
+
+                /*
+                 * Only register lowmem part of lowmem segment with bootmem.
+                 */
+                size = last_pfn - curr_pfn;
+                if (curr_pfn > PFN_DOWN(HIGHMEM_START))
+                        continue;
+                if (curr_pfn + size - 1 > PFN_DOWN(HIGHMEM_START))
+                        size = PFN_DOWN(HIGHMEM_START) - curr_pfn;
+                if (!size)
+                        continue;
+
+                /*
+                 * ... finally, did all the rounding and playing
+                 * around just make the area go away?
+                 */
+                if (last_pfn <= curr_pfn)
+                        continue;
+
+                /* Register lowmem ranges */
+                free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(size));
+        }
+
+        /* Reserve the bootmap memory.  */
+        reserve_bootmem(PFN_PHYS(first_usable_pfn), bootmap_size);
+#endif /* CONFIG_SGI_IP27 */
+
+#ifdef CONFIG_BLK_DEV_INITRD
+        initrd_below_start_ok = 1;
+        if (initrd_start) {
+                unsigned long initrd_size = ((unsigned char *)initrd_end) - ((unsigned char *)initrd_start);
+                printk("Initial ramdisk at: 0x%p (%lu bytes)\n",
+                       (void *)initrd_start, initrd_size);
+
+                if (CPHYSADDR(initrd_end) > PFN_PHYS(max_low_pfn)) {
+                        printk("initrd extends beyond end of memory "
+                               "(0x%0*Lx > 0x%0*Lx)\ndisabling initrd\n",
+                               sizeof(long) * 2,
+                               (unsigned long long)CPHYSADDR(initrd_end),
+                               sizeof(long) * 2,
+                               (unsigned long long)PFN_PHYS(max_low_pfn));
+                        initrd_start = initrd_end = 0;
+                        initrd_reserve_bootmem = 0;
+                }
+
+                if (initrd_reserve_bootmem)
+                        reserve_bootmem(CPHYSADDR(initrd_start), initrd_size);
+        }
+#endif /* CONFIG_BLK_DEV_INITRD  */
+}
+
+static inline void resource_init(void)
+{
+        int i;
+
+#if defined(CONFIG_MIPS64) && !defined(CONFIG_BUILD_ELF64)
+        /*
+         * The 64bit code in 32bit object format trick can't represent
+         * 64bit wide relocations for linker script symbols.
+         */
+        code_resource.start = CPHYSADDR(&_text);
+        code_resource.end = CPHYSADDR(&_etext) - 1;
+        data_resource.start = CPHYSADDR(&_etext);
+        data_resource.end = CPHYSADDR(&_edata) - 1;
+#else
+        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;
+#endif
+
+        /*
+         * Request address space for all standard RAM.
+         */
+        for (i = 0; i < boot_mem_map.nr_map; i++) {
+                struct resource *res;
+                unsigned long start, end;
+
+                start = boot_mem_map.map[i].addr;
+                end = boot_mem_map.map[i].addr + boot_mem_map.map[i].size - 1;
+                if (start >= MAXMEM)
+                        continue;
+                if (end >= MAXMEM)
+                        end = MAXMEM - 1;
+
+                res = alloc_bootmem(sizeof(struct resource));
+                switch (boot_mem_map.map[i].type) {
+                case BOOT_MEM_RAM:
+                case BOOT_MEM_ROM_DATA:
+                        res->name = "System RAM";
+                        break;
+                case BOOT_MEM_RESERVED:
+                default:
+                        res->name = "reserved";
+                }
+
+                res->start = start;
+                res->end = end;
+
+                res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
+                request_resource(&iomem_resource, res);
+
+                /*
+                 *  We don't know which RAM region contains kernel data,
+                 *  so we try it repeatedly and let the resource manager
+                 *  test it.
+                 */
+                request_resource(res, &code_resource);
+                request_resource(res, &data_resource);
+        }
+}
+
+#undef PFN_UP
+#undef PFN_DOWN
+#undef PFN_PHYS
+
+#undef MAXMEM
+#undef MAXMEM_PFN
+
+static int __initdata earlyinit_debug;
+
+static int __init earlyinit_debug_setup(char *str)
+{
+        earlyinit_debug = 1;
+        return 1;
+}
+__setup("earlyinit_debug", earlyinit_debug_setup);
+
+extern initcall_t __earlyinitcall_start, __earlyinitcall_end;
+
+static void __init do_earlyinitcalls(void)
+{
+        initcall_t *call, *start, *end;
+
+        start = &__earlyinitcall_start;
+        end = &__earlyinitcall_end;
+
+        for (call = start; call < end; call++) {
+                if (earlyinit_debug)
+                        printk("calling earlyinitcall 0x%p\n", *call);
+
+                (*call)();
+        }
+}
+
+void __init setup_arch(char **cmdline_p)
+{
+        cpu_probe();
+        prom_init();
+        cpu_report();
+
+#if defined(CONFIG_VT)
+#if defined(CONFIG_VGA_CONSOLE)
+        conswitchp = &vga_con;
+#elif defined(CONFIG_DUMMY_CONSOLE)
+        conswitchp = &dummy_con;
+#endif
+#endif
+
+        /* call board setup routine */
+        do_earlyinitcalls();
+
+        strlcpy(command_line, arcs_cmdline, sizeof(command_line));
+        strlcpy(saved_command_line, command_line, COMMAND_LINE_SIZE);
+
+        *cmdline_p = command_line;
+
+        parse_cmdline_early();
+        bootmem_init();
+        paging_init();
+        resource_init();
+}
+
+int __init fpu_disable(char *s)
+{
+        cpu_data[0].options &= ~MIPS_CPU_FPU;
+
+        return 1;
+}
+
+__setup("nofpu", fpu_disable);