| /* |
| * 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/string.h> |
| #include <linux/seq_file.h> |
| #include <linux/cpu.h> |
| #include <linux/initrd.h> |
| #include <linux/console.h> |
| #include <linux/debugfs.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_platform.h> |
| #include <linux/dma-mapping.h> |
| #include <asm/cacheflush.h> |
| #include <asm/entry.h> |
| #include <asm/cpuinfo.h> |
| |
| #include <asm/prom.h> |
| #include <asm/pgtable.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 */ |
| |
| unsigned int boot_cpuid; |
| char cmd_line[COMMAND_LINE_SIZE]; |
| |
| void __init setup_arch(char **cmdline_p) |
| { |
| *cmdline_p = cmd_line; |
| |
| console_verbose(); |
| |
| unflatten_device_tree(); |
| |
| setup_cpuinfo(); |
| |
| microblaze_cache_init(); |
| |
| setup_memory(); |
| |
| #ifdef CONFIG_EARLY_PRINTK |
| /* remap early console to virtual address */ |
| remap_early_printk(); |
| #endif |
| |
| xilinx_pci_init(); |
| |
| #if defined(CONFIG_SELFMOD_INTC) || defined(CONFIG_SELFMOD_TIMER) |
| printk(KERN_NOTICE "Self modified code enable\n"); |
| #endif |
| |
| #ifdef CONFIG_VT |
| #if defined(CONFIG_XILINX_CONSOLE) |
| conswitchp = &xil_con; |
| #elif defined(CONFIG_DUMMY_CONSOLE) |
| conswitchp = &dummy_con; |
| #endif |
| #endif |
| } |
| |
| #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); |
| |
| /* Copy command line passed from bootloader */ |
| #ifndef CONFIG_CMDLINE_BOOL |
| if (cmdline && cmdline[0] != '\0') |
| strlcpy(cmd_line, cmdline, COMMAND_LINE_SIZE); |
| #endif |
| |
| lockdep_init(); |
| |
| /* initialize device tree for usage in early_printk */ |
| early_init_devtree((void *)_fdt_start); |
| |
| #ifdef CONFIG_EARLY_PRINTK |
| setup_early_printk(NULL); |
| #endif |
| |
| /* 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); */ |
| |
| printk("Ramdisk addr 0x%08x, ", ram); |
| if (fdt) |
| printk("FDT at 0x%08x\n", fdt); |
| else |
| printk("Compiled-in FDT at 0x%08x\n", |
| (unsigned int)_fdt_start); |
| |
| #ifdef CONFIG_MTD_UCLINUX |
| printk("Found romfs @ 0x%08x (0x%08x)\n", |
| romfs_base, romfs_size); |
| printk("#### klimit %p ####\n", old_klimit); |
| BUG_ON(romfs_size < 0); /* What else can we do? */ |
| |
| printk("Moved 0x%08x bytes from 0x%08x to 0x%08x\n", |
| romfs_size, romfs_base, (unsigned)&__bss_stop); |
| |
| printk("New klimit: 0x%08x\n", (unsigned)klimit); |
| #endif |
| |
| #if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR |
| if (msr) |
| printk("!!!Your kernel has setup MSR instruction but " |
| "CPU don't have it %x\n", msr); |
| #else |
| if (!msr) |
| printk("!!!Your kernel not setup MSR instruction but " |
| "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; |
| } |
| |
| #ifdef CONFIG_DEBUG_FS |
| struct dentry *of_debugfs_root; |
| |
| static int microblaze_debugfs_init(void) |
| { |
| of_debugfs_root = debugfs_create_dir("microblaze", NULL); |
| |
| return of_debugfs_root == NULL; |
| } |
| arch_initcall(microblaze_debugfs_init); |
| |
| # ifdef CONFIG_MMU |
| static int __init debugfs_tlb(void) |
| { |
| struct dentry *d; |
| |
| if (!of_debugfs_root) |
| return -ENODEV; |
| |
| d = debugfs_create_u32("tlb_skip", S_IRUGO, of_debugfs_root, &tlb_skip); |
| if (!d) |
| return -ENOMEM; |
| } |
| device_initcall(debugfs_tlb); |
| # endif |
| #endif |
| |
| static int dflt_bus_notify(struct notifier_block *nb, |
| unsigned long action, void *data) |
| { |
| struct device *dev = data; |
| |
| /* We are only intereted in device addition */ |
| if (action != BUS_NOTIFY_ADD_DEVICE) |
| return 0; |
| |
| set_dma_ops(dev, &dma_direct_ops); |
| |
| return NOTIFY_DONE; |
| } |
| |
| static struct notifier_block dflt_plat_bus_notifier = { |
| .notifier_call = dflt_bus_notify, |
| .priority = INT_MAX, |
| }; |
| |
| static int __init setup_bus_notifier(void) |
| { |
| bus_register_notifier(&platform_bus_type, &dflt_plat_bus_notifier); |
| |
| return 0; |
| } |
| |
| arch_initcall(setup_bus_notifier); |