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> |
Michal Simek | 733cc21 | 2010-01-18 15:27:11 +0100 | [diff] [blame] | 25 | #include <linux/pci.h> |
Michal Simek | ec9f910 | 2009-03-27 14:25:24 +0100 | [diff] [blame] | 26 | #include <linux/cache.h> |
Michal Simek | ccfe27d | 2010-01-14 11:21:02 +0100 | [diff] [blame] | 27 | #include <linux/of_platform.h> |
| 28 | #include <linux/dma-mapping.h> |
Michal Simek | ec9f910 | 2009-03-27 14:25:24 +0100 | [diff] [blame] | 29 | #include <asm/cacheflush.h> |
| 30 | #include <asm/entry.h> |
| 31 | #include <asm/cpuinfo.h> |
| 32 | |
| 33 | #include <asm/system.h> |
| 34 | #include <asm/prom.h> |
| 35 | #include <asm/pgtable.h> |
| 36 | |
| 37 | DEFINE_PER_CPU(unsigned int, KSP); /* Saved kernel stack pointer */ |
| 38 | DEFINE_PER_CPU(unsigned int, KM); /* Kernel/user mode */ |
| 39 | DEFINE_PER_CPU(unsigned int, ENTRY_SP); /* Saved SP on kernel entry */ |
| 40 | DEFINE_PER_CPU(unsigned int, R11_SAVE); /* Temp variable for entry */ |
| 41 | DEFINE_PER_CPU(unsigned int, CURRENT_SAVE); /* Saved current pointer */ |
| 42 | |
| 43 | unsigned int boot_cpuid; |
| 44 | char cmd_line[COMMAND_LINE_SIZE]; |
| 45 | |
| 46 | void __init setup_arch(char **cmdline_p) |
| 47 | { |
Michal Simek | ec9f910 | 2009-03-27 14:25:24 +0100 | [diff] [blame] | 48 | *cmdline_p = cmd_line; |
| 49 | |
| 50 | console_verbose(); |
| 51 | |
| 52 | unflatten_device_tree(); |
| 53 | |
| 54 | /* NOTE I think that this function is not necessary to call */ |
| 55 | /* irq_early_init(); */ |
| 56 | setup_cpuinfo(); |
| 57 | |
Michal Simek | 2ee2ff8 | 2009-12-10 11:43:57 +0100 | [diff] [blame] | 58 | microblaze_cache_init(); |
Michal Simek | ec9f910 | 2009-03-27 14:25:24 +0100 | [diff] [blame] | 59 | |
Michal Simek | ec9f910 | 2009-03-27 14:25:24 +0100 | [diff] [blame] | 60 | setup_memory(); |
| 61 | |
Michal Simek | 733cc21 | 2010-01-18 15:27:11 +0100 | [diff] [blame] | 62 | xilinx_pci_init(); |
| 63 | |
Michal Simek | ec9f910 | 2009-03-27 14:25:24 +0100 | [diff] [blame] | 64 | #if defined(CONFIG_SELFMOD_INTC) || defined(CONFIG_SELFMOD_TIMER) |
| 65 | printk(KERN_NOTICE "Self modified code enable\n"); |
| 66 | #endif |
| 67 | |
| 68 | #ifdef CONFIG_VT |
| 69 | #if defined(CONFIG_XILINX_CONSOLE) |
| 70 | conswitchp = &xil_con; |
| 71 | #elif defined(CONFIG_DUMMY_CONSOLE) |
| 72 | conswitchp = &dummy_con; |
| 73 | #endif |
| 74 | #endif |
| 75 | } |
| 76 | |
| 77 | #ifdef CONFIG_MTD_UCLINUX |
| 78 | /* Handle both romfs and cramfs types, without generating unnecessary |
| 79 | code (ie no point checking for CRAMFS if it's not even enabled) */ |
| 80 | inline unsigned get_romfs_len(unsigned *addr) |
| 81 | { |
| 82 | #ifdef CONFIG_ROMFS_FS |
| 83 | if (memcmp(&addr[0], "-rom1fs-", 8) == 0) /* romfs */ |
| 84 | return be32_to_cpu(addr[2]); |
| 85 | #endif |
| 86 | |
| 87 | #ifdef CONFIG_CRAMFS |
| 88 | if (addr[0] == le32_to_cpu(0x28cd3d45)) /* cramfs */ |
| 89 | return le32_to_cpu(addr[1]); |
| 90 | #endif |
| 91 | return 0; |
| 92 | } |
| 93 | #endif /* CONFIG_MTD_UCLINUX_EBSS */ |
| 94 | |
Michal Simek | 6059b3c | 2010-03-24 11:07:10 +0100 | [diff] [blame] | 95 | #if defined(CONFIG_EARLY_PRINTK) && defined(CONFIG_SERIAL_UARTLITE_CONSOLE) |
| 96 | #define eprintk early_printk |
| 97 | #else |
| 98 | #define eprintk printk |
| 99 | #endif |
| 100 | |
Michal Simek | ec9f910 | 2009-03-27 14:25:24 +0100 | [diff] [blame] | 101 | void __init machine_early_init(const char *cmdline, unsigned int ram, |
Michal Simek | 2622434 | 2009-07-30 14:31:23 +0200 | [diff] [blame] | 102 | unsigned int fdt, unsigned int msr) |
Michal Simek | ec9f910 | 2009-03-27 14:25:24 +0100 | [diff] [blame] | 103 | { |
| 104 | unsigned long *src, *dst = (unsigned long *)0x0; |
| 105 | |
Michal Simek | cda1fd5 | 2009-05-19 14:33:47 +0200 | [diff] [blame] | 106 | /* If CONFIG_MTD_UCLINUX is defined, assume ROMFS is at the |
| 107 | * end of kernel. There are two position which we want to check. |
| 108 | * The first is __init_end and the second __bss_start. |
| 109 | */ |
| 110 | #ifdef CONFIG_MTD_UCLINUX |
| 111 | int romfs_size; |
| 112 | unsigned int romfs_base; |
| 113 | char *old_klimit = klimit; |
| 114 | |
| 115 | romfs_base = (ram ? ram : (unsigned int)&__init_end); |
| 116 | romfs_size = PAGE_ALIGN(get_romfs_len((unsigned *)romfs_base)); |
| 117 | if (!romfs_size) { |
| 118 | romfs_base = (unsigned int)&__bss_start; |
| 119 | romfs_size = PAGE_ALIGN(get_romfs_len((unsigned *)romfs_base)); |
| 120 | } |
| 121 | |
| 122 | /* Move ROMFS out of BSS before clearing it */ |
| 123 | if (romfs_size > 0) { |
| 124 | memmove(&_ebss, (int *)romfs_base, romfs_size); |
| 125 | klimit += romfs_size; |
| 126 | } |
| 127 | #endif |
| 128 | |
Michal Simek | ec9f910 | 2009-03-27 14:25:24 +0100 | [diff] [blame] | 129 | /* clearing bss section */ |
| 130 | memset(__bss_start, 0, __bss_stop-__bss_start); |
| 131 | memset(_ssbss, 0, _esbss-_ssbss); |
| 132 | |
Michal Simek | 1dff89a | 2009-05-21 08:20:30 +0200 | [diff] [blame] | 133 | /* Copy command line passed from bootloader */ |
Michal Simek | ec9f910 | 2009-03-27 14:25:24 +0100 | [diff] [blame] | 134 | #ifndef CONFIG_CMDLINE_BOOL |
| 135 | if (cmdline && cmdline[0] != '\0') |
| 136 | strlcpy(cmd_line, cmdline, COMMAND_LINE_SIZE); |
| 137 | #endif |
| 138 | |
Michal Simek | bf2d809 | 2009-12-10 12:07:02 +0100 | [diff] [blame] | 139 | lockdep_init(); |
| 140 | |
Michal Simek | ec9f910 | 2009-03-27 14:25:24 +0100 | [diff] [blame] | 141 | /* initialize device tree for usage in early_printk */ |
| 142 | early_init_devtree((void *)_fdt_start); |
| 143 | |
| 144 | #ifdef CONFIG_EARLY_PRINTK |
| 145 | setup_early_printk(NULL); |
| 146 | #endif |
| 147 | |
Michal Simek | 6059b3c | 2010-03-24 11:07:10 +0100 | [diff] [blame] | 148 | eprintk("Ramdisk addr 0x%08x, ", ram); |
Michal Simek | 74510f2 | 2009-06-22 10:28:40 +0200 | [diff] [blame] | 149 | if (fdt) |
Michal Simek | 6059b3c | 2010-03-24 11:07:10 +0100 | [diff] [blame] | 150 | eprintk("FDT at 0x%08x\n", fdt); |
Michal Simek | 74510f2 | 2009-06-22 10:28:40 +0200 | [diff] [blame] | 151 | else |
Michal Simek | 6059b3c | 2010-03-24 11:07:10 +0100 | [diff] [blame] | 152 | eprintk("Compiled-in FDT at 0x%08x\n", |
Michal Simek | 74510f2 | 2009-06-22 10:28:40 +0200 | [diff] [blame] | 153 | (unsigned int)_fdt_start); |
Michal Simek | ec9f910 | 2009-03-27 14:25:24 +0100 | [diff] [blame] | 154 | |
| 155 | #ifdef CONFIG_MTD_UCLINUX |
Michal Simek | 6059b3c | 2010-03-24 11:07:10 +0100 | [diff] [blame] | 156 | eprintk("Found romfs @ 0x%08x (0x%08x)\n", |
Michal Simek | cda1fd5 | 2009-05-19 14:33:47 +0200 | [diff] [blame] | 157 | romfs_base, romfs_size); |
Michal Simek | 6059b3c | 2010-03-24 11:07:10 +0100 | [diff] [blame] | 158 | eprintk("#### klimit %p ####\n", old_klimit); |
Michal Simek | cda1fd5 | 2009-05-19 14:33:47 +0200 | [diff] [blame] | 159 | BUG_ON(romfs_size < 0); /* What else can we do? */ |
Michal Simek | ec9f910 | 2009-03-27 14:25:24 +0100 | [diff] [blame] | 160 | |
Michal Simek | 6059b3c | 2010-03-24 11:07:10 +0100 | [diff] [blame] | 161 | eprintk("Moved 0x%08x bytes from 0x%08x to 0x%08x\n", |
Michal Simek | cda1fd5 | 2009-05-19 14:33:47 +0200 | [diff] [blame] | 162 | romfs_size, romfs_base, (unsigned)&_ebss); |
Michal Simek | ec9f910 | 2009-03-27 14:25:24 +0100 | [diff] [blame] | 163 | |
Michal Simek | 6059b3c | 2010-03-24 11:07:10 +0100 | [diff] [blame] | 164 | eprintk("New klimit: 0x%08x\n", (unsigned)klimit); |
Michal Simek | ec9f910 | 2009-03-27 14:25:24 +0100 | [diff] [blame] | 165 | #endif |
| 166 | |
Michal Simek | 2622434 | 2009-07-30 14:31:23 +0200 | [diff] [blame] | 167 | #if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR |
| 168 | if (msr) |
Michal Simek | 6059b3c | 2010-03-24 11:07:10 +0100 | [diff] [blame] | 169 | eprintk("!!!Your kernel has setup MSR instruction but " |
Michal Simek | 2622434 | 2009-07-30 14:31:23 +0200 | [diff] [blame] | 170 | "CPU don't have it %d\n", msr); |
| 171 | #else |
| 172 | if (!msr) |
Michal Simek | 6059b3c | 2010-03-24 11:07:10 +0100 | [diff] [blame] | 173 | eprintk("!!!Your kernel not setup MSR instruction but " |
Michal Simek | 2622434 | 2009-07-30 14:31:23 +0200 | [diff] [blame] | 174 | "CPU have it %d\n", msr); |
| 175 | #endif |
| 176 | |
Michal Simek | ec9f910 | 2009-03-27 14:25:24 +0100 | [diff] [blame] | 177 | for (src = __ivt_start; src < __ivt_end; src++, dst++) |
| 178 | *dst = *src; |
| 179 | |
| 180 | /* Initialize global data */ |
| 181 | per_cpu(KM, 0) = 0x1; /* We start in kernel mode */ |
| 182 | per_cpu(CURRENT_SAVE, 0) = (unsigned long)current; |
| 183 | } |
| 184 | |
| 185 | #ifdef CONFIG_DEBUG_FS |
| 186 | struct dentry *of_debugfs_root; |
| 187 | |
| 188 | static int microblaze_debugfs_init(void) |
| 189 | { |
| 190 | of_debugfs_root = debugfs_create_dir("microblaze", NULL); |
| 191 | |
| 192 | return of_debugfs_root == NULL; |
| 193 | } |
| 194 | arch_initcall(microblaze_debugfs_init); |
| 195 | #endif |
Michal Simek | ccfe27d | 2010-01-14 11:21:02 +0100 | [diff] [blame] | 196 | |
| 197 | static int dflt_bus_notify(struct notifier_block *nb, |
| 198 | unsigned long action, void *data) |
| 199 | { |
| 200 | struct device *dev = data; |
| 201 | |
| 202 | /* We are only intereted in device addition */ |
| 203 | if (action != BUS_NOTIFY_ADD_DEVICE) |
| 204 | return 0; |
| 205 | |
| 206 | set_dma_ops(dev, &dma_direct_ops); |
| 207 | |
| 208 | return NOTIFY_DONE; |
| 209 | } |
| 210 | |
| 211 | static struct notifier_block dflt_plat_bus_notifier = { |
| 212 | .notifier_call = dflt_bus_notify, |
| 213 | .priority = INT_MAX, |
| 214 | }; |
| 215 | |
Michal Simek | ccfe27d | 2010-01-14 11:21:02 +0100 | [diff] [blame] | 216 | static int __init setup_bus_notifier(void) |
| 217 | { |
| 218 | bus_register_notifier(&platform_bus_type, &dflt_plat_bus_notifier); |
Michal Simek | ccfe27d | 2010-01-14 11:21:02 +0100 | [diff] [blame] | 219 | |
| 220 | return 0; |
| 221 | } |
| 222 | |
| 223 | arch_initcall(setup_bus_notifier); |