kern/src/init.c - upstream - Git at Google

 /* See COPYRIGHT for copyright information. */

 #ifdef CONFIG_BSD_ON_CORE0
 #error "Yeah, it's not possible to build ROS with BSD on Core 0, sorry......"
 #else

 #include <arch/arch.h>
 #include <arch/console.h>
 #include <multiboot.h>
 #include <stab.h>
 #include <smp.h>

 #include <time.h>
 #include <atomic.h>
 #include <stdio.h>
 #include <string.h>
 #include <assert.h>
 #include <monitor.h>
 #include <pmap.h>
 #include <process.h>
 #include <trap.h>
 #include <syscall.h>
 #include <kclock.h>
 #include <manager.h>
 #include <testing.h>
 #include <kmalloc.h>
 #include <hashtable.h>
 #include <radix.h>
 #include <mm.h>
 #include <frontend.h>

 #include <arch/init.h>
 #include <bitmask.h>
 #include <slab.h>
 #include <kfs.h>
 #include <vfs.h>
 #include <devfs.h>
 #include <blockdev.h>
 #include <ext2fs.h>
 #include <kthread.h>
 #include <console.h>
 #include <linker_func.h>
 #include <ip.h>
 #include <acpi.h>
 #include <coreboot_tables.h>
 #include <ros/ttrace.h>

 int booting = 1;
 struct sysinfo_t sysinfo;
 static void run_linker_funcs(void);
 static int run_init_script(void);

 void kernel_init(multiboot_info_t *mboot_info)
 {
 	extern char edata[], end[];

 	memset(edata, 0, end - edata);
 	/* mboot_info is a physical address.  while some arches currently have the
 	 * lower memory mapped, everyone should have it mapped at kernbase by now.
 	 * also, it might be in 'free' memory, so once we start dynamically using
 	 * memory, we may clobber it. */
 	multiboot_kaddr = (struct multiboot_info*)((physaddr_t)mboot_info
                                                + KERNBASE);
 	cons_init();
 	print_cpuinfo();

 	cache_init();					// Determine systems's cache properties
 	pmem_init(multiboot_kaddr);
 	ttrace_init();                  // Setup timed tracer, depends on pmem
 	kmem_cache_init();              // Sets up slab allocator
 	kmalloc_init();
 	hashtable_init();
 	radix_init();
 	cache_color_alloc_init();       // Inits data structs
 	colored_page_alloc_init();      // Allocates colors for agnostic processes
 	acpiinit();
 	kthread_init();					/* might need to tweak when this happens */
 	vmr_init();
 	file_init();
 	page_check();
 	idt_init();
 	kernel_msg_init();
 	timer_init();
 	vfs_init();
 	devfs_init();
 	train_timing();
 	kb_buf_init(&cons_buf);
 	arch_init();
 	block_init();
 	ttrace_cleanup(); // Must be called after arch_init()
 	enable_irq();
 	run_linker_funcs();
 	/* reset/init devtab after linker funcs 3 and 4.  these run NIC and medium
 	 * pre-inits, which need to happen before devether. */
 	devtabreset();
 	devtabinit();

 #ifdef CONFIG_EXT2FS
 	mount_fs(&ext2_fs_type, "/dev/ramdisk", "/mnt", 0);
 #endif /* CONFIG_EXT2FS */
 #ifdef CONFIG_ETH_AUDIO
 	eth_audio_init();
 #endif /* CONFIG_ETH_AUDIO */
 	get_coreboot_info(&sysinfo);
 	booting = 0;

 #ifdef CONFIG_RUN_INIT_SCRIPT
 	if (run_init_script()) {
 		printk("Configured to run init script, but no script specified!\n");
 		manager();
 	}
 #else
 	manager();
 #endif
 }

 #ifdef CONFIG_RUN_INIT_SCRIPT
 static int run_init_script(void)
 {
 	/* If we have an init script path specified */
 	if (strlen(CONFIG_INIT_SCRIPT_PATH_AND_ARGS) != 0) {
 		int vargs = 0;
 		char *sptr = &CONFIG_INIT_SCRIPT_PATH_AND_ARGS[0];

 		/* Figure out how many arguments there are, by finding the spaces */
 		/* TODO: consider rewriting this stuff with parsecmd */
 		while (*sptr != '\0') {
 			if (*(sptr++) != ' ') {
 				vargs++;
 				while ((*sptr != ' ') && (*sptr != '\0'))
 					sptr++;
 			}
 		}

 		/* Initialize l_argv with its first three arguments, but allocate space
 		 * for all arguments as calculated above */
 		int static_args = 3;
 		int total_args = vargs + static_args;
 		char *l_argv[total_args];
 		l_argv[0] = "";
 		l_argv[1] = "busybox";
 		l_argv[2] = "ash";

 		/* Initialize l_argv with the rest of the arguments */
 		int i = static_args;
 		sptr = &CONFIG_INIT_SCRIPT_PATH_AND_ARGS[0];
 		while (*sptr != '\0') {
 			if (*sptr != ' ') {
 				l_argv[i++] = sptr;
 				while ((*sptr != ' ') && (*sptr != '\0'))
 					sptr++;
 				if (*sptr == '\0')
 					break;
 				*sptr = '\0';
 			}
 			sptr++;
 		}

 		/* Run the script with its arguments */
 		mon_bin_run(total_args, l_argv, NULL);
 	}
 	return -1;
 }
 #endif

 /*
  * Panic is called on unresolvable fatal errors.
  * It prints "panic: mesg", and then enters the kernel monitor.
  */
 void _panic(const char *file, int line, const char *fmt,...)
 {
 	va_list ap;
 	struct per_cpu_info *pcpui;
 	/* We're panicing, possibly in a place that can't handle the lock checker */
 	pcpui = &per_cpu_info[core_id_early()];
 	pcpui->__lock_checking_enabled--;
 	va_start(ap, fmt);
 	printk("kernel panic at %s:%d, from core %d: ", file, line,
 	       core_id_early());
 	vcprintf(fmt, ap);
 	cprintf("\n");
 	va_end(ap);

 dead:
 	monitor(NULL);
 	/* We could consider turning the lock checker back on here, but things are
 	 * probably a mess anyways, and with it on we would probably lock up right
 	 * away when we idle. */
 	//pcpui->__lock_checking_enabled++;
 	smp_idle();
 }

 /* like panic, but don't */
 void _warn(const char *file, int line, const char *fmt,...)
 {
 	va_list ap;

 	va_start(ap, fmt);
 	printk("kernel warning at %s:%d, from core %d: ", file, line,
 	       core_id_early());
 	vcprintf(fmt, ap);
 	cprintf("\n");
 	va_end(ap);
 }

 static void run_links(linker_func_t *linkstart, linker_func_t *linkend)
 {
 	/* Unlike with devtab, our linker sections for the function pointers are
 	 * 8 byte aligned (4 on 32 bit) (done by the linker/compiler), so we don't
 	 * have to worry about that.  */
 	printd("linkstart %p, linkend %p\n", linkstart, linkend);
 	for (int i = 0; &linkstart[i] < linkend; i++) {
 		printd("i %d, linkfunc %p\n", i, linkstart[i]);
 		linkstart[i]();
 	}
 }

 static void run_linker_funcs(void)
 {
 	run_links(__linkerfunc1start, __linkerfunc1end);
 	run_links(__linkerfunc2start, __linkerfunc2end);
 	run_links(__linkerfunc3start, __linkerfunc3end);
 	run_links(__linkerfunc4start, __linkerfunc4end);
 }

 /* You need to reference PROVIDE symbols somewhere, or they won't be included.
  * Only really a problem for debugging. */
 void debug_linker_tables(void)
 {
 	extern struct dev __devtabstart[];
 	extern struct dev __devtabend[];
 	printk("devtab %p %p\nlink1 %p %p\nlink2 %p %p\nlink3 %p %p\nlink4 %p %p\n",
 	       __devtabstart,
 	       __devtabend,
 		   __linkerfunc1start,
 		   __linkerfunc1end,
 		   __linkerfunc2start,
 		   __linkerfunc2end,
 		   __linkerfunc3start,
 		   __linkerfunc3end,
 		   __linkerfunc4start,
 		   __linkerfunc4end);
 }

 #endif //Everything For Free
	/* See COPYRIGHT for copyright information. */

	#ifdef CONFIG_BSD_ON_CORE0
	#error "Yeah, it's not possible to build ROS with BSD on Core 0, sorry......"
	#else

	#include <arch/arch.h>
	#include <arch/console.h>
	#include <multiboot.h>
	#include <stab.h>
	#include <smp.h>

	#include <time.h>
	#include <atomic.h>
	#include <stdio.h>
	#include <string.h>
	#include <assert.h>
	#include <monitor.h>
	#include <pmap.h>
	#include <process.h>
	#include <trap.h>
	#include <syscall.h>
	#include <kclock.h>
	#include <manager.h>
	#include <testing.h>
	#include <kmalloc.h>
	#include <hashtable.h>
	#include <radix.h>
	#include <mm.h>
	#include <frontend.h>

	#include <arch/init.h>
	#include <bitmask.h>
	#include <slab.h>
	#include <kfs.h>
	#include <vfs.h>
	#include <devfs.h>
	#include <blockdev.h>
	#include <ext2fs.h>
	#include <kthread.h>
	#include <console.h>
	#include <linker_func.h>
	#include <ip.h>
	#include <acpi.h>
	#include <coreboot_tables.h>
	#include <ros/ttrace.h>

	int booting = 1;
	struct sysinfo_t sysinfo;
	static void run_linker_funcs(void);
	static int run_init_script(void);

	void kernel_init(multiboot_info_t *mboot_info)
	{
	extern char edata[], end[];

	memset(edata, 0, end - edata);
	/* mboot_info is a physical address. while some arches currently have the
	* lower memory mapped, everyone should have it mapped at kernbase by now.
	* also, it might be in 'free' memory, so once we start dynamically using
	* memory, we may clobber it. */
	multiboot_kaddr = (struct multiboot_info*)((physaddr_t)mboot_info
	+ KERNBASE);
	cons_init();
	print_cpuinfo();

	cache_init(); // Determine systems's cache properties
	pmem_init(multiboot_kaddr);
	ttrace_init(); // Setup timed tracer, depends on pmem
	kmem_cache_init(); // Sets up slab allocator
	kmalloc_init();
	hashtable_init();
	radix_init();
	cache_color_alloc_init(); // Inits data structs
	colored_page_alloc_init(); // Allocates colors for agnostic processes
	acpiinit();
	kthread_init(); /* might need to tweak when this happens */
	vmr_init();
	file_init();
	page_check();
	idt_init();
	kernel_msg_init();
	timer_init();
	vfs_init();
	devfs_init();
	train_timing();
	kb_buf_init(&cons_buf);
	arch_init();
	block_init();
	ttrace_cleanup(); // Must be called after arch_init()
	enable_irq();
	run_linker_funcs();
	/* reset/init devtab after linker funcs 3 and 4. these run NIC and medium
	* pre-inits, which need to happen before devether. */
	devtabreset();
	devtabinit();

	#ifdef CONFIG_EXT2FS
	mount_fs(&ext2_fs_type, "/dev/ramdisk", "/mnt", 0);
	#endif /* CONFIG_EXT2FS */
	#ifdef CONFIG_ETH_AUDIO
	eth_audio_init();
	#endif /* CONFIG_ETH_AUDIO */
	get_coreboot_info(&sysinfo);
	booting = 0;

	#ifdef CONFIG_RUN_INIT_SCRIPT
	if (run_init_script()) {
	printk("Configured to run init script, but no script specified!\n");
	manager();
	}
	#else
	manager();
	#endif
	}

	#ifdef CONFIG_RUN_INIT_SCRIPT
	static int run_init_script(void)
	{
	/* If we have an init script path specified */
	if (strlen(CONFIG_INIT_SCRIPT_PATH_AND_ARGS) != 0) {
	int vargs = 0;
	char *sptr = &CONFIG_INIT_SCRIPT_PATH_AND_ARGS[0];

	/* Figure out how many arguments there are, by finding the spaces */
	/* TODO: consider rewriting this stuff with parsecmd */
	while (*sptr != '\0') {
	if (*(sptr++) != ' ') {
	vargs++;
	while ((sptr != ' ') && (sptr != '\0'))
	sptr++;
	}
	}

	/* Initialize l_argv with its first three arguments, but allocate space
	* for all arguments as calculated above */
	int static_args = 3;
	int total_args = vargs + static_args;
	char *l_argv[total_args];
	l_argv[0] = "";
	l_argv[1] = "busybox";
	l_argv[2] = "ash";

	/* Initialize l_argv with the rest of the arguments */
	int i = static_args;
	sptr = &CONFIG_INIT_SCRIPT_PATH_AND_ARGS[0];
	while (*sptr != '\0') {
	if (*sptr != ' ') {
	l_argv[i++] = sptr;
	while ((sptr != ' ') && (sptr != '\0'))
	sptr++;
	if (*sptr == '\0')
	break;
	*sptr = '\0';
	}
	sptr++;
	}

	/* Run the script with its arguments */
	mon_bin_run(total_args, l_argv, NULL);
	}
	return -1;
	}
	#endif

	/*
	* Panic is called on unresolvable fatal errors.
	* It prints "panic: mesg", and then enters the kernel monitor.
	*/
	void _panic(const char file, int line, const char fmt,...)
	{
	va_list ap;
	struct per_cpu_info *pcpui;
	/* We're panicing, possibly in a place that can't handle the lock checker */
	pcpui = &per_cpu_info[core_id_early()];
	pcpui->__lock_checking_enabled--;
	va_start(ap, fmt);
	printk("kernel panic at %s:%d, from core %d: ", file, line,
	core_id_early());
	vcprintf(fmt, ap);
	cprintf("\n");
	va_end(ap);

	dead:
	monitor(NULL);
	/* We could consider turning the lock checker back on here, but things are
	* probably a mess anyways, and with it on we would probably lock up right
	* away when we idle. */
	//pcpui->__lock_checking_enabled++;
	smp_idle();
	}

	/* like panic, but don't */
	void _warn(const char file, int line, const char fmt,...)
	{
	va_list ap;

	va_start(ap, fmt);
	printk("kernel warning at %s:%d, from core %d: ", file, line,
	core_id_early());
	vcprintf(fmt, ap);
	cprintf("\n");
	va_end(ap);
	}

	static void run_links(linker_func_t linkstart, linker_func_t linkend)
	{
	/* Unlike with devtab, our linker sections for the function pointers are
	* 8 byte aligned (4 on 32 bit) (done by the linker/compiler), so we don't
	* have to worry about that. */
	printd("linkstart %p, linkend %p\n", linkstart, linkend);
	for (int i = 0; &linkstart[i] < linkend; i++) {
	printd("i %d, linkfunc %p\n", i, linkstart[i]);
	linkstart[i]();
	}
	}

	static void run_linker_funcs(void)
	{
	run_links(__linkerfunc1start, __linkerfunc1end);
	run_links(__linkerfunc2start, __linkerfunc2end);
	run_links(__linkerfunc3start, __linkerfunc3end);
	run_links(__linkerfunc4start, __linkerfunc4end);
	}

	/* You need to reference PROVIDE symbols somewhere, or they won't be included.
	* Only really a problem for debugging. */
	void debug_linker_tables(void)
	{
	extern struct dev __devtabstart[];
	extern struct dev __devtabend[];
	printk("devtab %p %p\nlink1 %p %p\nlink2 %p %p\nlink3 %p %p\nlink4 %p %p\n",
	__devtabstart,
	__devtabend,
	__linkerfunc1start,
	__linkerfunc1end,
	__linkerfunc2start,
	__linkerfunc2end,
	__linkerfunc3start,
	__linkerfunc3end,
	__linkerfunc4start,
	__linkerfunc4end);
	}

	#endif //Everything For Free