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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200/* * 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/of_clk.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] __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);
static int __init debugfs_tlb(void){ debugfs_create_u32("tlb_skip", S_IRUGO, of_debugfs_root, &tlb_skip); return 0;}device_initcall(debugfs_tlb);#endif