Michal Simek | ec9f910 | 2009-03-27 14:25:24 +0100 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu> |
| 3 | * Copyright (C) 2007-2009 PetaLogix |
| 4 | * Copyright (C) 2006 Atmark Techno, Inc. |
| 5 | * |
| 6 | * This file is subject to the terms and conditions of the GNU General Public |
| 7 | * License. See the file "COPYING" in the main directory of this archive |
| 8 | * for more details. |
| 9 | */ |
| 10 | |
| 11 | #include <linux/init.h> |
| 12 | #include <linux/string.h> |
| 13 | #include <linux/seq_file.h> |
| 14 | #include <linux/cpu.h> |
| 15 | #include <linux/initrd.h> |
| 16 | #include <linux/console.h> |
| 17 | #include <linux/debugfs.h> |
| 18 | |
| 19 | #include <asm/setup.h> |
| 20 | #include <asm/sections.h> |
| 21 | #include <asm/page.h> |
| 22 | #include <linux/io.h> |
| 23 | #include <linux/bug.h> |
| 24 | #include <linux/param.h> |
| 25 | #include <linux/cache.h> |
| 26 | #include <asm/cacheflush.h> |
| 27 | #include <asm/entry.h> |
| 28 | #include <asm/cpuinfo.h> |
| 29 | |
| 30 | #include <asm/system.h> |
| 31 | #include <asm/prom.h> |
| 32 | #include <asm/pgtable.h> |
| 33 | |
| 34 | DEFINE_PER_CPU(unsigned int, KSP); /* Saved kernel stack pointer */ |
| 35 | DEFINE_PER_CPU(unsigned int, KM); /* Kernel/user mode */ |
| 36 | DEFINE_PER_CPU(unsigned int, ENTRY_SP); /* Saved SP on kernel entry */ |
| 37 | DEFINE_PER_CPU(unsigned int, R11_SAVE); /* Temp variable for entry */ |
| 38 | DEFINE_PER_CPU(unsigned int, CURRENT_SAVE); /* Saved current pointer */ |
| 39 | |
| 40 | unsigned int boot_cpuid; |
| 41 | char cmd_line[COMMAND_LINE_SIZE]; |
| 42 | |
| 43 | void __init setup_arch(char **cmdline_p) |
| 44 | { |
| 45 | #ifdef CONFIG_CMDLINE_FORCE |
| 46 | strlcpy(cmd_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE); |
| 47 | strlcpy(boot_command_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE); |
| 48 | #endif |
| 49 | *cmdline_p = cmd_line; |
| 50 | |
| 51 | console_verbose(); |
| 52 | |
| 53 | unflatten_device_tree(); |
| 54 | |
| 55 | /* NOTE I think that this function is not necessary to call */ |
| 56 | /* irq_early_init(); */ |
| 57 | setup_cpuinfo(); |
| 58 | |
| 59 | __invalidate_icache_all(); |
| 60 | __enable_icache(); |
| 61 | |
| 62 | __invalidate_dcache_all(); |
| 63 | __enable_dcache(); |
| 64 | |
| 65 | panic_timeout = 120; |
| 66 | |
| 67 | setup_memory(); |
| 68 | |
| 69 | #if defined(CONFIG_SELFMOD_INTC) || defined(CONFIG_SELFMOD_TIMER) |
| 70 | printk(KERN_NOTICE "Self modified code enable\n"); |
| 71 | #endif |
| 72 | |
| 73 | #ifdef CONFIG_VT |
| 74 | #if defined(CONFIG_XILINX_CONSOLE) |
| 75 | conswitchp = &xil_con; |
| 76 | #elif defined(CONFIG_DUMMY_CONSOLE) |
| 77 | conswitchp = &dummy_con; |
| 78 | #endif |
| 79 | #endif |
| 80 | } |
| 81 | |
| 82 | #ifdef CONFIG_MTD_UCLINUX |
| 83 | /* Handle both romfs and cramfs types, without generating unnecessary |
| 84 | code (ie no point checking for CRAMFS if it's not even enabled) */ |
| 85 | inline unsigned get_romfs_len(unsigned *addr) |
| 86 | { |
| 87 | #ifdef CONFIG_ROMFS_FS |
| 88 | if (memcmp(&addr[0], "-rom1fs-", 8) == 0) /* romfs */ |
| 89 | return be32_to_cpu(addr[2]); |
| 90 | #endif |
| 91 | |
| 92 | #ifdef CONFIG_CRAMFS |
| 93 | if (addr[0] == le32_to_cpu(0x28cd3d45)) /* cramfs */ |
| 94 | return le32_to_cpu(addr[1]); |
| 95 | #endif |
| 96 | return 0; |
| 97 | } |
| 98 | #endif /* CONFIG_MTD_UCLINUX_EBSS */ |
| 99 | |
| 100 | void __init machine_early_init(const char *cmdline, unsigned int ram, |
| 101 | unsigned int fdt) |
| 102 | { |
| 103 | unsigned long *src, *dst = (unsigned long *)0x0; |
| 104 | |
| 105 | /* clearing bss section */ |
| 106 | memset(__bss_start, 0, __bss_stop-__bss_start); |
| 107 | memset(_ssbss, 0, _esbss-_ssbss); |
| 108 | |
| 109 | /* |
| 110 | * Copy command line passed from bootloader, or use default |
| 111 | * if none provided, or forced |
| 112 | */ |
| 113 | #ifndef CONFIG_CMDLINE_BOOL |
| 114 | if (cmdline && cmdline[0] != '\0') |
| 115 | strlcpy(cmd_line, cmdline, COMMAND_LINE_SIZE); |
| 116 | #endif |
| 117 | |
| 118 | /* initialize device tree for usage in early_printk */ |
| 119 | early_init_devtree((void *)_fdt_start); |
| 120 | |
| 121 | #ifdef CONFIG_EARLY_PRINTK |
| 122 | setup_early_printk(NULL); |
| 123 | #endif |
| 124 | |
| 125 | early_printk("Ramdisk addr 0x%08x, FDT 0x%08x\n", ram, fdt); |
| 126 | printk(KERN_NOTICE "Found FDT at 0x%08x\n", fdt); |
| 127 | |
| 128 | #ifdef CONFIG_MTD_UCLINUX |
| 129 | { |
| 130 | int size; |
| 131 | unsigned int romfs_base; |
| 132 | romfs_base = (ram ? ram : (unsigned int)&__init_end); |
| 133 | /* if CONFIG_MTD_UCLINUX_EBSS is defined, assume ROMFS is at the |
| 134 | * end of kernel, which is ROMFS_LOCATION defined above. */ |
| 135 | size = PAGE_ALIGN(get_romfs_len((unsigned *)romfs_base)); |
| 136 | early_printk("Found romfs @ 0x%08x (0x%08x)\n", |
| 137 | romfs_base, size); |
| 138 | early_printk("#### klimit %p ####\n", klimit); |
| 139 | BUG_ON(size < 0); /* What else can we do? */ |
| 140 | |
| 141 | /* Use memmove to handle likely case of memory overlap */ |
| 142 | early_printk("Moving 0x%08x bytes from 0x%08x to 0x%08x\n", |
| 143 | size, romfs_base, (unsigned)&_ebss); |
| 144 | memmove(&_ebss, (int *)romfs_base, size); |
| 145 | |
| 146 | /* update klimit */ |
| 147 | klimit += PAGE_ALIGN(size); |
| 148 | early_printk("New klimit: 0x%08x\n", (unsigned)klimit); |
| 149 | } |
| 150 | #endif |
| 151 | |
| 152 | for (src = __ivt_start; src < __ivt_end; src++, dst++) |
| 153 | *dst = *src; |
| 154 | |
| 155 | /* Initialize global data */ |
| 156 | per_cpu(KM, 0) = 0x1; /* We start in kernel mode */ |
| 157 | per_cpu(CURRENT_SAVE, 0) = (unsigned long)current; |
| 158 | } |
| 159 | |
| 160 | #ifdef CONFIG_DEBUG_FS |
| 161 | struct dentry *of_debugfs_root; |
| 162 | |
| 163 | static int microblaze_debugfs_init(void) |
| 164 | { |
| 165 | of_debugfs_root = debugfs_create_dir("microblaze", NULL); |
| 166 | |
| 167 | return of_debugfs_root == NULL; |
| 168 | } |
| 169 | arch_initcall(microblaze_debugfs_init); |
| 170 | #endif |
| 171 | |
| 172 | void machine_restart(char *cmd) |
| 173 | { |
| 174 | printk(KERN_NOTICE "Machine restart...\n"); |
| 175 | dump_stack(); |
| 176 | while (1) |
| 177 | ; |
| 178 | } |
| 179 | |
| 180 | void machine_shutdown(void) |
| 181 | { |
| 182 | printk(KERN_NOTICE "Machine shutdown...\n"); |
| 183 | while (1) |
| 184 | ; |
| 185 | } |
| 186 | |
| 187 | void machine_halt(void) |
| 188 | { |
| 189 | printk(KERN_NOTICE "Machine halt...\n"); |
| 190 | while (1) |
| 191 | ; |
| 192 | } |
| 193 | |
| 194 | void machine_power_off(void) |
| 195 | { |
| 196 | printk(KERN_NOTICE "Machine power off...\n"); |
| 197 | while (1) |
| 198 | ; |
| 199 | } |