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> |
Michal Simek | c112054 | 2013-12-18 17:18:48 +0100 | [diff] [blame] | 12 | #include <linux/clk-provider.h> |
Michal Simek | 4bcd943 | 2013-08-27 11:13:29 +0200 | [diff] [blame] | 13 | #include <linux/clocksource.h> |
Michal Simek | ec9f910 | 2009-03-27 14:25:24 +0100 | [diff] [blame] | 14 | #include <linux/string.h> |
| 15 | #include <linux/seq_file.h> |
| 16 | #include <linux/cpu.h> |
| 17 | #include <linux/initrd.h> |
| 18 | #include <linux/console.h> |
| 19 | #include <linux/debugfs.h> |
Rob Herring | 5c9f303 | 2013-09-07 14:05:10 -0500 | [diff] [blame] | 20 | #include <linux/of_fdt.h> |
Michal Simek | ec9f910 | 2009-03-27 14:25:24 +0100 | [diff] [blame] | 21 | |
| 22 | #include <asm/setup.h> |
| 23 | #include <asm/sections.h> |
| 24 | #include <asm/page.h> |
| 25 | #include <linux/io.h> |
| 26 | #include <linux/bug.h> |
| 27 | #include <linux/param.h> |
Michal Simek | 733cc21 | 2010-01-18 15:27:11 +0100 | [diff] [blame] | 28 | #include <linux/pci.h> |
Michal Simek | ec9f910 | 2009-03-27 14:25:24 +0100 | [diff] [blame] | 29 | #include <linux/cache.h> |
Michal Simek | ccfe27d | 2010-01-14 11:21:02 +0100 | [diff] [blame] | 30 | #include <linux/of_platform.h> |
| 31 | #include <linux/dma-mapping.h> |
Michal Simek | ec9f910 | 2009-03-27 14:25:24 +0100 | [diff] [blame] | 32 | #include <asm/cacheflush.h> |
| 33 | #include <asm/entry.h> |
| 34 | #include <asm/cpuinfo.h> |
| 35 | |
Michal Simek | ec9f910 | 2009-03-27 14:25:24 +0100 | [diff] [blame] | 36 | #include <asm/prom.h> |
| 37 | #include <asm/pgtable.h> |
| 38 | |
| 39 | DEFINE_PER_CPU(unsigned int, KSP); /* Saved kernel stack pointer */ |
| 40 | DEFINE_PER_CPU(unsigned int, KM); /* Kernel/user mode */ |
| 41 | DEFINE_PER_CPU(unsigned int, ENTRY_SP); /* Saved SP on kernel entry */ |
| 42 | DEFINE_PER_CPU(unsigned int, R11_SAVE); /* Temp variable for entry */ |
| 43 | DEFINE_PER_CPU(unsigned int, CURRENT_SAVE); /* Saved current pointer */ |
| 44 | |
| 45 | unsigned int boot_cpuid; |
Michal Simek | fcc1c0f | 2012-08-16 15:53:35 +0200 | [diff] [blame] | 46 | /* |
| 47 | * Placed cmd_line to .data section because can be initialized from |
| 48 | * ASM code. Default position is BSS section which is cleared |
| 49 | * in machine_early_init(). |
| 50 | */ |
| 51 | char cmd_line[COMMAND_LINE_SIZE] __attribute__ ((section(".data"))); |
Michal Simek | ec9f910 | 2009-03-27 14:25:24 +0100 | [diff] [blame] | 52 | |
| 53 | void __init setup_arch(char **cmdline_p) |
| 54 | { |
Rob Herring | dc0b433 | 2013-08-26 10:19:07 -0500 | [diff] [blame] | 55 | *cmdline_p = boot_command_line; |
Michal Simek | ec9f910 | 2009-03-27 14:25:24 +0100 | [diff] [blame] | 56 | |
| 57 | console_verbose(); |
| 58 | |
| 59 | unflatten_device_tree(); |
| 60 | |
Michal Simek | ec9f910 | 2009-03-27 14:25:24 +0100 | [diff] [blame] | 61 | setup_cpuinfo(); |
| 62 | |
Michal Simek | 2ee2ff8 | 2009-12-10 11:43:57 +0100 | [diff] [blame] | 63 | microblaze_cache_init(); |
Michal Simek | ec9f910 | 2009-03-27 14:25:24 +0100 | [diff] [blame] | 64 | |
Michal Simek | ec9f910 | 2009-03-27 14:25:24 +0100 | [diff] [blame] | 65 | setup_memory(); |
| 66 | |
Michal Simek | e721a45 | 2011-04-04 15:45:06 +0200 | [diff] [blame] | 67 | #ifdef CONFIG_EARLY_PRINTK |
| 68 | /* remap early console to virtual address */ |
| 69 | remap_early_printk(); |
| 70 | #endif |
| 71 | |
Michal Simek | 733cc21 | 2010-01-18 15:27:11 +0100 | [diff] [blame] | 72 | xilinx_pci_init(); |
| 73 | |
Paul Bolle | 8c770db | 2014-05-20 11:55:50 +0200 | [diff] [blame] | 74 | #if defined(CONFIG_DUMMY_CONSOLE) |
Michal Simek | ec9f910 | 2009-03-27 14:25:24 +0100 | [diff] [blame] | 75 | conswitchp = &dummy_con; |
| 76 | #endif |
Michal Simek | ec9f910 | 2009-03-27 14:25:24 +0100 | [diff] [blame] | 77 | } |
| 78 | |
| 79 | #ifdef CONFIG_MTD_UCLINUX |
| 80 | /* Handle both romfs and cramfs types, without generating unnecessary |
| 81 | code (ie no point checking for CRAMFS if it's not even enabled) */ |
| 82 | inline unsigned get_romfs_len(unsigned *addr) |
| 83 | { |
| 84 | #ifdef CONFIG_ROMFS_FS |
| 85 | if (memcmp(&addr[0], "-rom1fs-", 8) == 0) /* romfs */ |
| 86 | return be32_to_cpu(addr[2]); |
| 87 | #endif |
| 88 | |
| 89 | #ifdef CONFIG_CRAMFS |
| 90 | if (addr[0] == le32_to_cpu(0x28cd3d45)) /* cramfs */ |
| 91 | return le32_to_cpu(addr[1]); |
| 92 | #endif |
| 93 | return 0; |
| 94 | } |
| 95 | #endif /* CONFIG_MTD_UCLINUX_EBSS */ |
| 96 | |
Michal Simek | 95b0f9e | 2010-02-08 16:41:38 +0100 | [diff] [blame] | 97 | unsigned long kernel_tlb; |
| 98 | |
Michal Simek | ec9f910 | 2009-03-27 14:25:24 +0100 | [diff] [blame] | 99 | void __init machine_early_init(const char *cmdline, unsigned int ram, |
Michal Simek | 95b0f9e | 2010-02-08 16:41:38 +0100 | [diff] [blame] | 100 | unsigned int fdt, unsigned int msr, unsigned int tlb0, |
| 101 | unsigned int tlb1) |
Michal Simek | ec9f910 | 2009-03-27 14:25:24 +0100 | [diff] [blame] | 102 | { |
Michal Simek | 0b9b020 | 2010-11-08 12:37:40 +0100 | [diff] [blame] | 103 | unsigned long *src, *dst; |
| 104 | unsigned int offset = 0; |
Michal Simek | ec9f910 | 2009-03-27 14:25:24 +0100 | [diff] [blame] | 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) { |
Geert Uytterhoeven | 363737d | 2012-05-31 22:39:21 +0200 | [diff] [blame] | 124 | memmove(&__bss_stop, (int *)romfs_base, romfs_size); |
Michal Simek | cda1fd5 | 2009-05-19 14:33:47 +0200 | [diff] [blame] | 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 | ec9f910 | 2009-03-27 14:25:24 +0100 | [diff] [blame] | 133 | /* initialize device tree for usage in early_printk */ |
Geert Uytterhoeven | 7746c99 | 2013-11-12 20:42:18 +0100 | [diff] [blame] | 134 | early_init_devtree(_fdt_start); |
Michal Simek | ec9f910 | 2009-03-27 14:25:24 +0100 | [diff] [blame] | 135 | |
| 136 | #ifdef CONFIG_EARLY_PRINTK |
| 137 | setup_early_printk(NULL); |
| 138 | #endif |
| 139 | |
Michal Simek | 95b0f9e | 2010-02-08 16:41:38 +0100 | [diff] [blame] | 140 | /* setup kernel_tlb after BSS cleaning |
| 141 | * Maybe worth to move to asm code */ |
| 142 | kernel_tlb = tlb0 + tlb1; |
| 143 | /* printk("TLB1 0x%08x, TLB0 0x%08x, tlb 0x%x\n", tlb0, |
| 144 | tlb1, kernel_tlb); */ |
| 145 | |
Michal Simek | 6bd55f0 | 2012-12-27 10:40:38 +0100 | [diff] [blame] | 146 | pr_info("Ramdisk addr 0x%08x, ", ram); |
Michal Simek | 74510f2 | 2009-06-22 10:28:40 +0200 | [diff] [blame] | 147 | if (fdt) |
Michal Simek | 6bd55f0 | 2012-12-27 10:40:38 +0100 | [diff] [blame] | 148 | pr_info("FDT at 0x%08x\n", fdt); |
Michal Simek | 74510f2 | 2009-06-22 10:28:40 +0200 | [diff] [blame] | 149 | else |
Geert Uytterhoeven | 7746c99 | 2013-11-12 20:42:18 +0100 | [diff] [blame] | 150 | pr_info("Compiled-in FDT at %p\n", _fdt_start); |
Michal Simek | ec9f910 | 2009-03-27 14:25:24 +0100 | [diff] [blame] | 151 | |
| 152 | #ifdef CONFIG_MTD_UCLINUX |
Michal Simek | 6bd55f0 | 2012-12-27 10:40:38 +0100 | [diff] [blame] | 153 | pr_info("Found romfs @ 0x%08x (0x%08x)\n", |
Michal Simek | cda1fd5 | 2009-05-19 14:33:47 +0200 | [diff] [blame] | 154 | romfs_base, romfs_size); |
Michal Simek | 6bd55f0 | 2012-12-27 10:40:38 +0100 | [diff] [blame] | 155 | pr_info("#### klimit %p ####\n", old_klimit); |
Michal Simek | cda1fd5 | 2009-05-19 14:33:47 +0200 | [diff] [blame] | 156 | BUG_ON(romfs_size < 0); /* What else can we do? */ |
Michal Simek | ec9f910 | 2009-03-27 14:25:24 +0100 | [diff] [blame] | 157 | |
Michal Simek | 6bd55f0 | 2012-12-27 10:40:38 +0100 | [diff] [blame] | 158 | pr_info("Moved 0x%08x bytes from 0x%08x to 0x%08x\n", |
Geert Uytterhoeven | 363737d | 2012-05-31 22:39:21 +0200 | [diff] [blame] | 159 | romfs_size, romfs_base, (unsigned)&__bss_stop); |
Michal Simek | ec9f910 | 2009-03-27 14:25:24 +0100 | [diff] [blame] | 160 | |
Michal Simek | 6bd55f0 | 2012-12-27 10:40:38 +0100 | [diff] [blame] | 161 | pr_info("New klimit: 0x%08x\n", (unsigned)klimit); |
Michal Simek | ec9f910 | 2009-03-27 14:25:24 +0100 | [diff] [blame] | 162 | #endif |
| 163 | |
Michal Simek | 2622434 | 2009-07-30 14:31:23 +0200 | [diff] [blame] | 164 | #if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR |
Michal Simek | 6bd55f0 | 2012-12-27 10:40:38 +0100 | [diff] [blame] | 165 | if (msr) { |
| 166 | pr_info("!!!Your kernel has setup MSR instruction but "); |
| 167 | pr_cont("CPU don't have it %x\n", msr); |
| 168 | } |
Michal Simek | 2622434 | 2009-07-30 14:31:23 +0200 | [diff] [blame] | 169 | #else |
Michal Simek | 6bd55f0 | 2012-12-27 10:40:38 +0100 | [diff] [blame] | 170 | if (!msr) { |
| 171 | pr_info("!!!Your kernel not setup MSR instruction but "); |
Michal Simek | eae3810 | 2013-11-19 14:27:33 +0100 | [diff] [blame] | 172 | pr_cont("CPU have it %x\n", msr); |
Michal Simek | 6bd55f0 | 2012-12-27 10:40:38 +0100 | [diff] [blame] | 173 | } |
Michal Simek | 2622434 | 2009-07-30 14:31:23 +0200 | [diff] [blame] | 174 | #endif |
| 175 | |
Michal Simek | 0b9b020 | 2010-11-08 12:37:40 +0100 | [diff] [blame] | 176 | /* Do not copy reset vectors. offset = 0x2 means skip the first |
| 177 | * two instructions. dst is pointer to MB vectors which are placed |
| 178 | * in block ram. If you want to copy reset vector setup offset to 0x0 */ |
| 179 | #if !CONFIG_MANUAL_RESET_VECTOR |
| 180 | offset = 0x2; |
| 181 | #endif |
| 182 | dst = (unsigned long *) (offset * sizeof(u32)); |
| 183 | for (src = __ivt_start + offset; src < __ivt_end; src++, dst++) |
Michal Simek | ec9f910 | 2009-03-27 14:25:24 +0100 | [diff] [blame] | 184 | *dst = *src; |
| 185 | |
| 186 | /* Initialize global data */ |
| 187 | per_cpu(KM, 0) = 0x1; /* We start in kernel mode */ |
| 188 | per_cpu(CURRENT_SAVE, 0) = (unsigned long)current; |
| 189 | } |
| 190 | |
Michal Simek | 4bcd943 | 2013-08-27 11:13:29 +0200 | [diff] [blame] | 191 | void __init time_init(void) |
| 192 | { |
Michal Simek | c112054 | 2013-12-18 17:18:48 +0100 | [diff] [blame] | 193 | of_clk_init(NULL); |
| 194 | setup_cpuinfo_clk(); |
Daniel Lezcano | ba5d08c | 2017-05-26 17:40:46 +0200 | [diff] [blame] | 195 | timer_probe(); |
Michal Simek | 4bcd943 | 2013-08-27 11:13:29 +0200 | [diff] [blame] | 196 | } |
| 197 | |
Michal Simek | ec9f910 | 2009-03-27 14:25:24 +0100 | [diff] [blame] | 198 | #ifdef CONFIG_DEBUG_FS |
| 199 | struct dentry *of_debugfs_root; |
| 200 | |
| 201 | static int microblaze_debugfs_init(void) |
| 202 | { |
| 203 | of_debugfs_root = debugfs_create_dir("microblaze", NULL); |
| 204 | |
| 205 | return of_debugfs_root == NULL; |
| 206 | } |
| 207 | arch_initcall(microblaze_debugfs_init); |
Michal Simek | e02db0a | 2010-02-08 16:41:38 +0100 | [diff] [blame] | 208 | |
Michal Simek | a28d73c | 2012-03-28 10:31:36 +0200 | [diff] [blame] | 209 | # ifdef CONFIG_MMU |
Michal Simek | e02db0a | 2010-02-08 16:41:38 +0100 | [diff] [blame] | 210 | static int __init debugfs_tlb(void) |
| 211 | { |
| 212 | struct dentry *d; |
| 213 | |
| 214 | if (!of_debugfs_root) |
| 215 | return -ENODEV; |
| 216 | |
| 217 | d = debugfs_create_u32("tlb_skip", S_IRUGO, of_debugfs_root, &tlb_skip); |
| 218 | if (!d) |
| 219 | return -ENOMEM; |
Michal Simek | 5b3084b | 2013-02-01 15:11:21 +0100 | [diff] [blame] | 220 | |
| 221 | return 0; |
Michal Simek | e02db0a | 2010-02-08 16:41:38 +0100 | [diff] [blame] | 222 | } |
| 223 | device_initcall(debugfs_tlb); |
Michal Simek | a28d73c | 2012-03-28 10:31:36 +0200 | [diff] [blame] | 224 | # endif |
Michal Simek | ec9f910 | 2009-03-27 14:25:24 +0100 | [diff] [blame] | 225 | #endif |