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 *cmdline_p = cmd_line;
49 unflatten_device_tree();
51 /* NOTE I think that this function is not necessary to call */
52 /* irq_early_init(); */
55 __invalidate_icache_all();
58 __invalidate_dcache_all();
65 #if defined(CONFIG_SELFMOD_INTC) || defined(CONFIG_SELFMOD_TIMER)
66 printk(KERN_NOTICE "Self modified code enable\n");
70 #if defined(CONFIG_XILINX_CONSOLE)
71 conswitchp = &xil_con;
72 #elif defined(CONFIG_DUMMY_CONSOLE)
73 conswitchp = &dummy_con;
78 #ifdef CONFIG_MTD_UCLINUX
79 /* Handle both romfs and cramfs types, without generating unnecessary
80 code (ie no point checking for CRAMFS if it's not even enabled) */
81 inline unsigned get_romfs_len(unsigned *addr)
83 #ifdef CONFIG_ROMFS_FS
84 if (memcmp(&addr[0], "-rom1fs-", 8) == 0) /* romfs */
85 return be32_to_cpu(addr[2]);
89 if (addr[0] == le32_to_cpu(0x28cd3d45)) /* cramfs */
90 return le32_to_cpu(addr[1]);
94 #endif /* CONFIG_MTD_UCLINUX_EBSS */
96 void __init machine_early_init(const char *cmdline, unsigned int ram,
99 unsigned long *src, *dst = (unsigned long *)0x0;
101 /* If CONFIG_MTD_UCLINUX is defined, assume ROMFS is at the
102 * end of kernel. There are two position which we want to check.
103 * The first is __init_end and the second __bss_start.
105 #ifdef CONFIG_MTD_UCLINUX
107 unsigned int romfs_base;
108 char *old_klimit = klimit;
110 romfs_base = (ram ? ram : (unsigned int)&__init_end);
111 romfs_size = PAGE_ALIGN(get_romfs_len((unsigned *)romfs_base));
113 romfs_base = (unsigned int)&__bss_start;
114 romfs_size = PAGE_ALIGN(get_romfs_len((unsigned *)romfs_base));
117 /* Move ROMFS out of BSS before clearing it */
118 if (romfs_size > 0) {
119 memmove(&_ebss, (int *)romfs_base, romfs_size);
120 klimit += romfs_size;
124 /* clearing bss section */
125 memset(__bss_start, 0, __bss_stop-__bss_start);
126 memset(_ssbss, 0, _esbss-_ssbss);
128 /* Copy command line passed from bootloader */
129 #ifndef CONFIG_CMDLINE_BOOL
130 if (cmdline && cmdline[0] != '\0')
131 strlcpy(cmd_line, cmdline, COMMAND_LINE_SIZE);
134 /* initialize device tree for usage in early_printk */
135 early_init_devtree((void *)_fdt_start);
137 #ifdef CONFIG_EARLY_PRINTK
138 setup_early_printk(NULL);
141 early_printk("Ramdisk addr 0x%08x, FDT 0x%08x\n", ram, fdt);
142 printk(KERN_NOTICE "Found FDT at 0x%08x\n", fdt);
144 #ifdef CONFIG_MTD_UCLINUX
145 early_printk("Found romfs @ 0x%08x (0x%08x)\n",
146 romfs_base, romfs_size);
147 early_printk("#### klimit %p ####\n", old_klimit);
148 BUG_ON(romfs_size < 0); /* What else can we do? */
150 early_printk("Moved 0x%08x bytes from 0x%08x to 0x%08x\n",
151 romfs_size, romfs_base, (unsigned)&_ebss);
153 early_printk("New klimit: 0x%08x\n", (unsigned)klimit);
156 for (src = __ivt_start; src < __ivt_end; src++, dst++)
159 /* Initialize global data */
160 per_cpu(KM, 0) = 0x1; /* We start in kernel mode */
161 per_cpu(CURRENT_SAVE, 0) = (unsigned long)current;
164 #ifdef CONFIG_DEBUG_FS
165 struct dentry *of_debugfs_root;
167 static int microblaze_debugfs_init(void)
169 of_debugfs_root = debugfs_create_dir("microblaze", NULL);
171 return of_debugfs_root == NULL;
173 arch_initcall(microblaze_debugfs_init);
176 void machine_restart(char *cmd)
178 printk(KERN_NOTICE "Machine restart...\n");
184 void machine_shutdown(void)
186 printk(KERN_NOTICE "Machine shutdown...\n");
191 void machine_halt(void)
193 printk(KERN_NOTICE "Machine halt...\n");
198 void machine_power_off(void)
200 printk(KERN_NOTICE "Machine power off...\n");