microblaze_v8: setup.c, setup.h - system setting
Reviewed-by: Ingo Molnar <mingo@elte.hu> Reviewed-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Acked-by: John Linn <john.linn@xilinx.com> Acked-by: John Williams <john.williams@petalogix.com> Signed-off-by: Michal Simek <monstr@monstr.eu>
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Michal Simek
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/*
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* Copyright (C) 2007-2008 Michal Simek <monstr@monstr.eu>
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* Copyright (C) 2006 Atmark Techno, Inc.
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#ifndef _ASM_MICROBLAZE_SETUP_H
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#define _ASM_MICROBLAZE_SETUP_H
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#define COMMAND_LINE_SIZE 256
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# ifndef __ASSEMBLY__
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# ifdef __KERNEL__
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extern unsigned int boot_cpuid; /* move to smp.h */
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extern char cmd_line[COMMAND_LINE_SIZE];
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# endif/* __KERNEL__ */
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void early_printk(const char *fmt, ...);
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int setup_early_printk(char *opt);
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void disable_early_printk(void);
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void heartbeat(void);
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void setup_heartbeat(void);
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unsigned long long sched_clock(void);
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void time_init(void);
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void init_IRQ(void);
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void machine_early_init(const char *cmdline, unsigned int ram,
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unsigned int fdt);
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void machine_restart(char *cmd);
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void machine_shutdown(void);
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void machine_halt(void);
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void machine_power_off(void);
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# endif /* __ASSEMBLY__ */
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#endif /* _ASM_MICROBLAZE_SETUP_H */
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/*
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* Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
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* Copyright (C) 2007-2009 PetaLogix
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* Copyright (C) 2006 Atmark Techno, Inc.
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#include <linux/init.h>
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#include <linux/string.h>
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#include <linux/seq_file.h>
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#include <linux/cpu.h>
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#include <linux/initrd.h>
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#include <linux/console.h>
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#include <linux/debugfs.h>
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#include <asm/setup.h>
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#include <asm/sections.h>
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#include <asm/page.h>
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#include <linux/io.h>
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#include <linux/bug.h>
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#include <linux/param.h>
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#include <linux/cache.h>
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#include <asm/cacheflush.h>
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#include <asm/entry.h>
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#include <asm/cpuinfo.h>
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#include <asm/system.h>
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#include <asm/prom.h>
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#include <asm/pgtable.h>
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DEFINE_PER_CPU(unsigned int, KSP); /* Saved kernel stack pointer */
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DEFINE_PER_CPU(unsigned int, KM); /* Kernel/user mode */
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DEFINE_PER_CPU(unsigned int, ENTRY_SP); /* Saved SP on kernel entry */
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DEFINE_PER_CPU(unsigned int, R11_SAVE); /* Temp variable for entry */
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DEFINE_PER_CPU(unsigned int, CURRENT_SAVE); /* Saved current pointer */
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unsigned int boot_cpuid;
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char cmd_line[COMMAND_LINE_SIZE];
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void __init setup_arch(char **cmdline_p)
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{
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#ifdef CONFIG_CMDLINE_FORCE
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strlcpy(cmd_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
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strlcpy(boot_command_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
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#endif
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*cmdline_p = cmd_line;
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console_verbose();
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unflatten_device_tree();
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/* NOTE I think that this function is not necessary to call */
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/* irq_early_init(); */
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setup_cpuinfo();
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__invalidate_icache_all();
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__enable_icache();
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__invalidate_dcache_all();
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__enable_dcache();
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panic_timeout = 120;
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setup_memory();
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#if defined(CONFIG_SELFMOD_INTC) || defined(CONFIG_SELFMOD_TIMER)
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printk(KERN_NOTICE "Self modified code enable\n");
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#endif
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#ifdef CONFIG_VT
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#if defined(CONFIG_XILINX_CONSOLE)
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conswitchp = &xil_con;
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#elif defined(CONFIG_DUMMY_CONSOLE)
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conswitchp = &dummy_con;
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#endif
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#endif
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}
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#ifdef CONFIG_MTD_UCLINUX
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/* Handle both romfs and cramfs types, without generating unnecessary
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code (ie no point checking for CRAMFS if it's not even enabled) */
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inline unsigned get_romfs_len(unsigned *addr)
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{
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#ifdef CONFIG_ROMFS_FS
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if (memcmp(&addr[0], "-rom1fs-", 8) == 0) /* romfs */
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return be32_to_cpu(addr[2]);
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#endif
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#ifdef CONFIG_CRAMFS
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if (addr[0] == le32_to_cpu(0x28cd3d45)) /* cramfs */
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return le32_to_cpu(addr[1]);
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#endif
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return 0;
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}
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#endif /* CONFIG_MTD_UCLINUX_EBSS */
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void __init machine_early_init(const char *cmdline, unsigned int ram,
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unsigned int fdt)
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{
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unsigned long *src, *dst = (unsigned long *)0x0;
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/* clearing bss section */
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memset(__bss_start, 0, __bss_stop-__bss_start);
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memset(_ssbss, 0, _esbss-_ssbss);
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/*
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* Copy command line passed from bootloader, or use default
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* if none provided, or forced
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*/
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#ifndef CONFIG_CMDLINE_BOOL
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if (cmdline && cmdline[0] != '\0')
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strlcpy(cmd_line, cmdline, COMMAND_LINE_SIZE);
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#endif
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/* initialize device tree for usage in early_printk */
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early_init_devtree((void *)_fdt_start);
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#ifdef CONFIG_EARLY_PRINTK
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setup_early_printk(NULL);
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#endif
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early_printk("Ramdisk addr 0x%08x, FDT 0x%08x\n", ram, fdt);
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printk(KERN_NOTICE "Found FDT at 0x%08x\n", fdt);
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#ifdef CONFIG_MTD_UCLINUX
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{
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int size;
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unsigned int romfs_base;
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romfs_base = (ram ? ram : (unsigned int)&__init_end);
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/* if CONFIG_MTD_UCLINUX_EBSS is defined, assume ROMFS is at the
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* end of kernel, which is ROMFS_LOCATION defined above. */
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size = PAGE_ALIGN(get_romfs_len((unsigned *)romfs_base));
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early_printk("Found romfs @ 0x%08x (0x%08x)\n",
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romfs_base, size);
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early_printk("#### klimit %p ####\n", klimit);
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BUG_ON(size < 0); /* What else can we do? */
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/* Use memmove to handle likely case of memory overlap */
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early_printk("Moving 0x%08x bytes from 0x%08x to 0x%08x\n",
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size, romfs_base, (unsigned)&_ebss);
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memmove(&_ebss, (int *)romfs_base, size);
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/* update klimit */
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klimit += PAGE_ALIGN(size);
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early_printk("New klimit: 0x%08x\n", (unsigned)klimit);
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}
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#endif
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for (src = __ivt_start; src < __ivt_end; src++, dst++)
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*dst = *src;
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/* Initialize global data */
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per_cpu(KM, 0) = 0x1; /* We start in kernel mode */
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per_cpu(CURRENT_SAVE, 0) = (unsigned long)current;
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}
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#ifdef CONFIG_DEBUG_FS
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struct dentry *of_debugfs_root;
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static int microblaze_debugfs_init(void)
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{
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of_debugfs_root = debugfs_create_dir("microblaze", NULL);
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return of_debugfs_root == NULL;
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}
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arch_initcall(microblaze_debugfs_init);
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#endif
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void machine_restart(char *cmd)
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{
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printk(KERN_NOTICE "Machine restart...\n");
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dump_stack();
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while (1)
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;
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}
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void machine_shutdown(void)
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{
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printk(KERN_NOTICE "Machine shutdown...\n");
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while (1)
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;
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}
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void machine_halt(void)
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{
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printk(KERN_NOTICE "Machine halt...\n");
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while (1)
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;
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}
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void machine_power_off(void)
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{
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printk(KERN_NOTICE "Machine power off...\n");
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while (1)
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;
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}
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