/* * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu> * Copyright (C) 2007-2009 PetaLogix * Copyright (C) 2006 Atmark Techno, Inc. * * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. */ #include <linux/init.h>#include <linux/clk-provider.h>#include <linux/clocksource.h>#include <linux/string.h>#include <linux/seq_file.h>#include <linux/cpu.h>#include <linux/initrd.h>#include <linux/console.h>#include <linux/debugfs.h>#include <linux/of_fdt.h>#include <linux/pgtable.h> #include <asm/setup.h>#include <asm/sections.h>#include <asm/page.h>#include <linux/io.h>#include <linux/bug.h>#include <linux/param.h>#include <linux/pci.h>#include <linux/cache.h>#include <linux/of.h>#include <linux/dma-mapping.h>#include <asm/cacheflush.h>#include <asm/entry.h>#include <asm/cpuinfo.h>  DEFINE_PER_CPU(unsigned int, KSP);	/* Saved kernel stack pointer */DEFINE_PER_CPU(unsigned int, KM);	/* Kernel/user mode */DEFINE_PER_CPU(unsigned int, ENTRY_SP);	/* Saved SP on kernel entry */DEFINE_PER_CPU(unsigned int, R11_SAVE);	/* Temp variable for entry */DEFINE_PER_CPU(unsigned int, CURRENT_SAVE);	/* Saved current pointer */ /* * Placed cmd_line to .data section because can be initialized from * ASM code. Default position is BSS section which is cleared * in machine_early_init(). */char cmd_line[COMMAND_LINE_SIZE] __attribute__ ((section(".data"))); void __init setup_arch(char **cmdline_p){	*cmdline_p = boot_command_line; 	setup_memory(); 	console_verbose(); 	unflatten_device_tree(); 	setup_cpuinfo(); 	microblaze_cache_init(); 	xilinx_pci_init();} #ifdef CONFIG_MTD_UCLINUX/* Handle both romfs and cramfs types, without generating unnecessary code (ie no point checking for CRAMFS if it's not even enabled) */inline unsigned get_romfs_len(unsigned *addr){#ifdef CONFIG_ROMFS_FS	if (memcmp(&addr[0], "-rom1fs-", 8) == 0) /* romfs */		return be32_to_cpu(addr[2]);#endif #ifdef CONFIG_CRAMFS	if (addr[0] == le32_to_cpu(0x28cd3d45)) /* cramfs */		return le32_to_cpu(addr[1]);#endif	return 0;}#endif	/* CONFIG_MTD_UCLINUX_EBSS */ unsigned long kernel_tlb; void __init machine_early_init(const char *cmdline, unsigned int ram,		unsigned int fdt, unsigned int msr, unsigned int tlb0,		unsigned int tlb1){	unsigned long *src, *dst;	unsigned int offset = 0; 	/* If CONFIG_MTD_UCLINUX is defined, assume ROMFS is at the	 * end of kernel. There are two position which we want to check.	 * The first is __init_end and the second __bss_start.	 */#ifdef CONFIG_MTD_UCLINUX	int romfs_size;	unsigned int romfs_base;	char *old_klimit = klimit; 	romfs_base = (ram ? ram : (unsigned int)&__init_end);	romfs_size = PAGE_ALIGN(get_romfs_len((unsigned *)romfs_base));	if (!romfs_size) {		romfs_base = (unsigned int)&__bss_start;		romfs_size = PAGE_ALIGN(get_romfs_len((unsigned *)romfs_base));	} 	/* Move ROMFS out of BSS before clearing it */	if (romfs_size > 0) {		memmove(&__bss_stop, (int *)romfs_base, romfs_size);		klimit += romfs_size;	}#endif /* clearing bss section */	memset(__bss_start, 0, __bss_stop-__bss_start);	memset(_ssbss, 0, _esbss-_ssbss); /* initialize device tree for usage in early_printk */	early_init_devtree(_fdt_start); 	/* setup kernel_tlb after BSS cleaning	 * Maybe worth to move to asm code */	kernel_tlb = tlb0 + tlb1;	/* printk("TLB1 0x%08x, TLB0 0x%08x, tlb 0x%x\n", tlb0,							tlb1, kernel_tlb); */ 	pr_info("Ramdisk addr 0x%08x, ", ram);	if (fdt)		pr_info("FDT at 0x%08x\n", fdt);	else		pr_info("Compiled-in FDT at %p\n", _fdt_start); #ifdef CONFIG_MTD_UCLINUX	pr_info("Found romfs @ 0x%08x (0x%08x)\n",			romfs_base, romfs_size);	pr_info("#### klimit %p ####\n", old_klimit);	BUG_ON(romfs_size < 0); /* What else can we do? */ 	pr_info("Moved 0x%08x bytes from 0x%08x to 0x%08x\n",			romfs_size, romfs_base, (unsigned)&__bss_stop); 	pr_info("New klimit: 0x%08x\n", (unsigned)klimit);#endif #if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR	if (msr) {		pr_info("!!!Your kernel has setup MSR instruction but ");		pr_cont("CPU don't have it %x\n", msr);	}#else	if (!msr) {		pr_info("!!!Your kernel not setup MSR instruction but ");		pr_cont("CPU have it %x\n", msr);	}#endif 	/* Do not copy reset vectors. offset = 0x2 means skip the first	 * two instructions. dst is pointer to MB vectors which are placed	 * in block ram. If you want to copy reset vector setup offset to 0x0 */#if !CONFIG_MANUAL_RESET_VECTOR	offset = 0x2;#endif	dst = (unsigned long *) (offset * sizeof(u32));	for (src = __ivt_start + offset; src < __ivt_end; src++, dst++)		*dst = *src; 	/* Initialize global data */	per_cpu(KM, 0) = 0x1;	/* We start in kernel mode */	per_cpu(CURRENT_SAVE, 0) = (unsigned long)current;} void __init time_init(void){	of_clk_init(NULL);	setup_cpuinfo_clk();	timer_probe();} #ifdef CONFIG_DEBUG_FSstruct dentry *of_debugfs_root; static int microblaze_debugfs_init(void){	of_debugfs_root = debugfs_create_dir("microblaze", NULL);	return 0;}arch_initcall(microblaze_debugfs_init); # ifdef CONFIG_MMUstatic int __init debugfs_tlb(void){	debugfs_create_u32("tlb_skip", S_IRUGO, of_debugfs_root, &tlb_skip);	return 0;}device_initcall(debugfs_tlb);# endif#endif