2 * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
3 * Copyright (C) 2007-2009 PetaLogix
4 * Copyright (C) 2006 Atmark Techno, Inc.
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
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>
19 #include <asm/setup.h>
20 #include <asm/sections.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>
30 #include <asm/system.h>
32 #include <asm/pgtable.h>
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 */
40 unsigned int boot_cpuid;
41 char cmd_line[COMMAND_LINE_SIZE];
43 void __init setup_arch(char **cmdline_p)
45 #ifdef CONFIG_CMDLINE_FORCE
46 strlcpy(cmd_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
47 strlcpy(boot_command_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
49 *cmdline_p = cmd_line;
53 unflatten_device_tree();
55 /* NOTE I think that this function is not necessary to call */
56 /* irq_early_init(); */
59 __invalidate_icache_all();
62 __invalidate_dcache_all();
69 #if defined(CONFIG_SELFMOD_INTC) || defined(CONFIG_SELFMOD_TIMER)
70 printk(KERN_NOTICE "Self modified code enable\n");
74 #if defined(CONFIG_XILINX_CONSOLE)
75 conswitchp = &xil_con;
76 #elif defined(CONFIG_DUMMY_CONSOLE)
77 conswitchp = &dummy_con;
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)
87 #ifdef CONFIG_ROMFS_FS
88 if (memcmp(&addr[0], "-rom1fs-", 8) == 0) /* romfs */
89 return be32_to_cpu(addr[2]);
93 if (addr[0] == le32_to_cpu(0x28cd3d45)) /* cramfs */
94 return le32_to_cpu(addr[1]);
98 #endif /* CONFIG_MTD_UCLINUX_EBSS */
100 void __init machine_early_init(const char *cmdline, unsigned int ram,
103 unsigned long *src, *dst = (unsigned long *)0x0;
105 /* clearing bss section */
106 memset(__bss_start, 0, __bss_stop-__bss_start);
107 memset(_ssbss, 0, _esbss-_ssbss);
110 * Copy command line passed from bootloader, or use default
111 * if none provided, or forced
113 #ifndef CONFIG_CMDLINE_BOOL
114 if (cmdline && cmdline[0] != '\0')
115 strlcpy(cmd_line, cmdline, COMMAND_LINE_SIZE);
118 /* initialize device tree for usage in early_printk */
119 early_init_devtree((void *)_fdt_start);
121 #ifdef CONFIG_EARLY_PRINTK
122 setup_early_printk(NULL);
125 early_printk("Ramdisk addr 0x%08x, FDT 0x%08x\n", ram, fdt);
126 printk(KERN_NOTICE "Found FDT at 0x%08x\n", fdt);
128 #ifdef CONFIG_MTD_UCLINUX
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",
138 early_printk("#### klimit %p ####\n", klimit);
139 BUG_ON(size < 0); /* What else can we do? */
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);
147 klimit += PAGE_ALIGN(size);
148 early_printk("New klimit: 0x%08x\n", (unsigned)klimit);
152 for (src = __ivt_start; src < __ivt_end; src++, dst++)
155 /* Initialize global data */
156 per_cpu(KM, 0) = 0x1; /* We start in kernel mode */
157 per_cpu(CURRENT_SAVE, 0) = (unsigned long)current;
160 #ifdef CONFIG_DEBUG_FS
161 struct dentry *of_debugfs_root;
163 static int microblaze_debugfs_init(void)
165 of_debugfs_root = debugfs_create_dir("microblaze", NULL);
167 return of_debugfs_root == NULL;
169 arch_initcall(microblaze_debugfs_init);
172 void machine_restart(char *cmd)
174 printk(KERN_NOTICE "Machine restart...\n");
180 void machine_shutdown(void)
182 printk(KERN_NOTICE "Machine shutdown...\n");
187 void machine_halt(void)
189 printk(KERN_NOTICE "Machine halt...\n");
194 void machine_power_off(void)
196 printk(KERN_NOTICE "Machine power off...\n");