int main(void)
{
/*
* 0. Hardware probing etc.
* 1. Trap
* 2. SMP per-CPU setup
* 3. Interrupt, including PIC, LAPIC, IOAPIC etc.
* 4. Disk storage
* 5. Memory mapping, including page tables, allocators etc.
* a) Swapping
* 6. Scheduler
* 7. File system
* 8. SMP Startup
* a) Slave CPUs should skip to step 11
* 9. Fork and load /sbin/init into process table
* 10. Enable swapping & scheduler
* 11. Enter idle stage
*/
printk("Hello from kernel!\r\n");
/* 0. */
setup_arch();
test_stacktrace();
}
void purgatory(void)
{
printf("I'm in purgatory\n");
setup_arch();
verify_sha256_digest();
post_verification_setup_arch();
}
void setup_kernel()
{
setup_arch();
/* Init IRQ and timer system */
__disable_interrupts();
irq_disable();
irq_init();
// scheduler_init();
/* timer_init(); */
ipc_init();
irq_enable();
// mmu_init();
}
int
main(int argc, char **argv)
{
int rc;
if (argc != 2) {
fprintf(stderr, "Usage: %s <dump>\n", argv[0]);
return TEST_ERR;
}
rc = set_default_params();
if (rc != TEST_OK) {
perror("Cannot set default params");
return rc;
}
rc = parse_params_file(¶ms, stdin);
if (rc != TEST_OK)
return rc;
rc = setup_arch();
if (rc != TEST_OK)
return rc;
if (vmcoreinfo_file) {
vmcoreinfo.blob = slurp(vmcoreinfo_file);
if (vmcoreinfo.blob == NULL)
return TEST_ERR;
}
if (note_file) {
notes.blob = slurp(note_file);
if (notes.blob == NULL)
return TEST_ERR;
}
if (eraseinfo_file) {
eraseinfo.blob = slurp(eraseinfo_file);
if (eraseinfo.blob == NULL)
return TEST_ERR;
}
rc = create_file(argv[1]);
if (rc != TEST_OK)
return rc;
return TEST_OK;
}
void start_kernel(void)
{
seg_t base, end;
/* We set the idle task as #0, and init_task() will be task #1 */
sched_init(); /* This block of functions don't need console */
setup_arch(&base, &end);
mm_init(base, end);
buffer_init();
inode_init();
init_IRQ();
tty_init();
init_console();
#if (CONFIG_BOGOMIPS == 0)
calibrate_delay();
#endif
device_setup();
#ifdef CONFIG_SOCKET
sock_init();
#endif
fs_init();
mm_stat(base, end);
printk("ELKS version %s\n", system_utsname.release);
kfork_proc(init_task);
wake_up_process(&task[1]);
/*
* We are now the idle task. We won't run unless no other process can run.
*/
while (1) {
schedule();
#ifdef CONFIG_IDLE_HALT
idle_halt ();
#endif
}
}
void start_kernel(void)
{
seg_t base, end;
/* We set the scheduler up as task #0, and this as task #1 */
setup_arch(&base, &end);
mm_init(base, end);
init_IRQ();
init_console();
#if 0
calibrate_delay();
#endif
setup_mm(); /* Architecture specifics */
tty_init();
buffer_init();
#ifdef CONFIG_SOCKET
sock_init();
#endif
device_setup();
inode_init();
fs_init();
sched_init();
printk("ELKS version %s\n", system_utsname.release);
task[0].t_kstackm = KSTACK_MAGIC;
task[0].next_run = task[0].prev_run = &task[0];
kfork_proc(&task[1], init_task);
/*
* We are now the idle task. We won't run unless no other process can run.
*/
while (1){
schedule();
}
}
asmlinkage void __init start_kernel(void)
{
char * command_line;
extern struct kernel_param __start___param[], __stop___param[];
smp_setup_processor_id();
/*
* Need to run as early as possible, to initialize the
* lockdep hash:
*/
lockdep_init();
debug_objects_early_init();
/*
* Set up the the initial canary ASAP:
*/
boot_init_stack_canary();
cgroup_init_early();
local_irq_disable();
early_boot_irqs_off();
early_init_irq_lock_class();
/*
* Interrupts are still disabled. Do necessary setups, then
* enable them
*/
lock_kernel();
tick_init();
boot_cpu_init();
page_address_init();
printk(KERN_NOTICE "%s", linux_banner);
setup_arch(&command_line);
mm_init_owner(&init_mm, &init_task);
setup_command_line(command_line);
setup_nr_cpu_ids();
setup_per_cpu_areas();
smp_prepare_boot_cpu(); /* arch-specific boot-cpu hooks */
build_all_zonelists(NULL);
page_alloc_init();
printk(KERN_NOTICE "Kernel command line: %s\n", boot_command_line);
//[email protected] 2011.11.14 begin
//support lcd compatible
//reviewed by [email protected]
#if defined(CONFIG_LCD_DRV_ALL)
char *p = strstr(boot_command_line, "lcd=");
if (p)
{
lcd_drv_index = p[4] - 'A';
printk("lcd index = %d", lcd_drv_index);
}
#endif
//[email protected] 2011.11.14 end
parse_early_param();
parse_args("Booting kernel", static_command_line, __start___param,
__stop___param - __start___param,
&unknown_bootoption);
/*
* These use large bootmem allocations and must precede
* kmem_cache_init()
*/
pidhash_init();
vfs_caches_init_early();
sort_main_extable();
trap_init();
mm_init();
/*
* Set up the scheduler prior starting any interrupts (such as the
* timer interrupt). Full topology setup happens at smp_init()
* time - but meanwhile we still have a functioning scheduler.
*/
sched_init();
/*
* Disable preemption - early bootup scheduling is extremely
* fragile until we cpu_idle() for the first time.
*/
preempt_disable();
if (!irqs_disabled()) {
printk(KERN_WARNING "start_kernel(): bug: interrupts were "
"enabled *very* early, fixing it\n");
local_irq_disable();
}
rcu_init();
radix_tree_init();
/* init some links before init_ISA_irqs() */
early_irq_init();
init_IRQ();
prio_tree_init();
init_timers();
hrtimers_init();
softirq_init();
timekeeping_init();
time_init();
profile_init();
if (!irqs_disabled())
printk(KERN_CRIT "start_kernel(): bug: interrupts were "
"enabled early\n");
early_boot_irqs_on();
local_irq_enable();
/* Interrupts are enabled now so all GFP allocations are safe. */
gfp_allowed_mask = __GFP_BITS_MASK;
kmem_cache_init_late();
/*
* HACK ALERT! This is early. We're enabling the console before
* we've done PCI setups etc, and console_init() must be aware of
* this. But we do want output early, in case something goes wrong.
*/
console_init();
if (panic_later)
panic(panic_later, panic_param);
lockdep_info();
/*
* Need to run this when irqs are enabled, because it wants
* to self-test [hard/soft]-irqs on/off lock inversion bugs
* too:
*/
locking_selftest();
#ifdef CONFIG_BLK_DEV_INITRD
if (initrd_start && !initrd_below_start_ok &&
page_to_pfn(virt_to_page((void *)initrd_start)) < min_low_pfn) {
printk(KERN_CRIT "initrd overwritten (0x%08lx < 0x%08lx) - "
"disabling it.\n",
page_to_pfn(virt_to_page((void *)initrd_start)),
min_low_pfn);
initrd_start = 0;
}
#endif
page_cgroup_init();
enable_debug_pagealloc();
kmemtrace_init();
kmemleak_init();
debug_objects_mem_init();
idr_init_cache();
setup_per_cpu_pageset();
numa_policy_init();
if (late_time_init)
late_time_init();
sched_clock_init();
calibrate_delay();
pidmap_init();
anon_vma_init();
#ifdef CONFIG_X86
if (efi_enabled)
efi_enter_virtual_mode();
#endif
thread_info_cache_init();
cred_init();
fork_init(totalram_pages);
proc_caches_init();
buffer_init();
key_init();
security_init();
dbg_late_init();
vfs_caches_init(totalram_pages);
signals_init();
/* rootfs populating might need page-writeback */
page_writeback_init();
#ifdef CONFIG_PROC_FS
proc_root_init();
#endif
cgroup_init();
cpuset_init();
taskstats_init_early();
delayacct_init();
check_bugs();
acpi_early_init(); /* before LAPIC and SMP init */
sfi_init_late();
ftrace_init();
/* Do the rest non-__init'ed, we're now alive */
rest_init();
}
asmlinkage void __init start_kernel(void)
{
char * command_line;
extern struct kernel_param __start___param[], __stop___param[];
smp_setup_processor_id();
/*
* Need to run as early as possible, to initialize the
* lockdep hash:
*/
unwind_init();
lockdep_init();
local_irq_disable();
early_boot_irqs_off();
early_init_irq_lock_class();
/*
* Interrupts are still disabled. Do necessary setups, then
* enable them
*/
lock_kernel();
boot_cpu_init();
page_address_init();
printk(KERN_NOTICE);
printk(linux_banner);
setup_arch(&command_line);
setup_per_cpu_areas();
smp_prepare_boot_cpu(); /* arch-specific boot-cpu hooks */
/*
* Set up the scheduler prior starting any interrupts (such as the
* timer interrupt). Full topology setup happens at smp_init()
* time - but meanwhile we still have a functioning scheduler.
*/
sched_init();
/*
* Disable preemption - early bootup scheduling is extremely
* fragile until we cpu_idle() for the first time.
*/
preempt_disable();
build_all_zonelists();
page_alloc_init();
printk(KERN_NOTICE "Kernel command line: %s\n", saved_command_line);
parse_early_param();
parse_args("Booting kernel", command_line, __start___param,
__stop___param - __start___param,
&unknown_bootoption);
sort_main_extable();
trap_init();
rcu_init();
init_IRQ();
pidhash_init();
init_timers();
hrtimers_init();
softirq_init();
timekeeping_init();
time_init();
profile_init();
if (!irqs_disabled())
printk("start_kernel(): bug: interrupts were enabled early\n");
early_boot_irqs_on();
local_irq_enable();
/*
* HACK ALERT! This is early. We're enabling the console before
* we've done PCI setups etc, and console_init() must be aware of
* this. But we do want output early, in case something goes wrong.
*/
console_init();
if (panic_later)
panic(panic_later, panic_param);
lockdep_info();
/*
* Need to run this when irqs are enabled, because it wants
* to self-test [hard/soft]-irqs on/off lock inversion bugs
* too:
*/
locking_selftest();
#ifdef CONFIG_BLK_DEV_INITRD
if (initrd_start && !initrd_below_start_ok &&
initrd_start < min_low_pfn << PAGE_SHIFT) {
printk(KERN_CRIT "initrd overwritten (0x%08lx < 0x%08lx) - "
"disabling it.\n",initrd_start,min_low_pfn << PAGE_SHIFT);
initrd_start = 0;
}
#endif
vfs_caches_init_early();
cpuset_init_early();
mem_init();
kmem_cache_init();
setup_per_cpu_pageset();
numa_policy_init();
if (late_time_init)
late_time_init();
calibrate_delay();
pidmap_init();
pgtable_cache_init();
prio_tree_init();
anon_vma_init();
#ifdef CONFIG_X86
if (efi_enabled)
efi_enter_virtual_mode();
#endif
fork_init(num_physpages);
proc_caches_init();
buffer_init();
unnamed_dev_init();
key_init();
security_init();
vfs_caches_init(num_physpages);
radix_tree_init();
signals_init();
/* rootfs populating might need page-writeback */
page_writeback_init();
#ifdef CONFIG_PROC_FS
proc_root_init();
#endif
cpuset_init();
taskstats_init_early();
delayacct_init();
check_bugs();
acpi_early_init(); /* before LAPIC and SMP init */
/* Do the rest non-__init'ed, we're now alive */
rest_init();
}
asmlinkage void __init start_kernel(void)
{
char * command_line;
extern char saved_command_line[];
/*
* Interrupts are still disabled. Do necessary setups, then
* enable them
*/
lock_kernel();
printk(linux_banner);
setup_arch(&command_line);
printk("Kernel command line: %s\n", saved_command_line);
parse_options(command_line);
trap_init();
init_IRQ();
sched_init();
softirq_init();
time_init();
/*
* HACK ALERT! This is early. We're enabling the console before
* we've done PCI setups etc, and console_init() must be aware of
* this. But we do want output early, in case something goes wrong.
*/
console_init();
#ifdef CONFIG_MODULES
init_modules();
#endif
if (prof_shift) {
unsigned int size;
/* only text is profiled */
prof_len = (unsigned long) &_etext - (unsigned long) &_stext;
prof_len >>= prof_shift;
size = prof_len * sizeof(unsigned int) + PAGE_SIZE-1;
prof_buffer = (unsigned int *) alloc_bootmem(size);
}
kmem_cache_init();
sti();
calibrate_delay();
#ifdef CONFIG_BLK_DEV_INITRD
if (initrd_start && !initrd_below_start_ok &&
initrd_start < min_low_pfn << PAGE_SHIFT) {
printk(KERN_CRIT "initrd overwritten (0x%08lx < 0x%08lx) - "
"disabling it.\n",initrd_start,min_low_pfn << PAGE_SHIFT);
initrd_start = 0;
}
#endif
mem_init();
kmem_cache_sizes_init();
pgtable_cache_init();
/*
* For architectures that have highmem, num_mappedpages represents
* the amount of memory the kernel can use. For other architectures
* it's the same as the total pages. We need both numbers because
* some subsystems need to initialize based on how much memory the
* kernel can use.
*/
if (num_mappedpages == 0)
num_mappedpages = num_physpages;
fork_init(num_mappedpages);
proc_caches_init();
vfs_caches_init(num_physpages);
buffer_init(num_physpages);
page_cache_init(num_physpages);
#if defined(CONFIG_ARCH_S390)
ccwcache_init();
#endif
signals_init();
#ifdef CONFIG_PROC_FS
proc_root_init();
#endif
check_bugs();
printk("POSIX conformance testing by UNIFIX\n");
/*
* We count on the initial thread going ok
* Like idlers init is an unlocked kernel thread, which will
* make syscalls (and thus be locked).
*/
smp_init();
#if defined(CONFIG_SYSVIPC)
ipc_init();
#endif
rest_init();
}
/**
* This is the architecture-independent kernel entry point. Before it is
* called, architecture-specific code has done the bare minimum initialization
* necessary. This function initializes the kernel and its various subsystems.
* It calls back to architecture-specific code at several well defined points,
* which all architectures must implement (e.g., setup_arch()).
*
* \callgraph
*/
void
start_kernel()
{
unsigned int cpu;
unsigned int timeout;
int status;
/*
* Parse the kernel boot command line.
* This is where boot-time configurable variables get set,
* e.g., the ones with param() and DRIVER_PARAM() specifiers.
*/
parse_params(lwk_command_line);
/*
* Initialize the console subsystem.
* printk()'s will be visible after this.
*/
console_init();
/*
* Hello, Dave.
*/
printk("%s", lwk_banner);
printk(KERN_DEBUG "%s\n", lwk_command_line);
sort_exception_table();
/*
* Do architecture specific initialization.
* This detects memory, CPUs, architecture dependent irqs, etc.
*/
setup_arch();
/*
* Setup the architecture independent interrupt handling.
*/
irq_init();
/*
* Initialize the kernel memory subsystem. Up until now, the simple
* boot-time memory allocator (bootmem) has been used for all dynamic
* memory allocation. Here, the bootmem allocator is destroyed and all
* of the free pages it was managing are added to the kernel memory
* pool (kmem) or the user memory pool (umem).
*
* After this point, any use of the bootmem allocator will cause a
* kernel panic. The normal kernel memory subsystem API should be used
* instead (e.g., kmem_alloc() and kmem_free()).
*/
mem_subsys_init();
/*
* Initialize the address space management subsystem.
*/
aspace_subsys_init();
sched_init_runqueue(0); /* This CPUs scheduler state + idle task */
sched_add_task(current); /* now safe to call schedule() */
/*
* Initialize the task scheduling subsystem.
*/
core_timer_init(0);
/* Start the kernel filesystems */
kfs_init();
/*
* Initialize the random number generator.
*/
rand_init();
workq_init();
/*
* Boot all of the other CPUs in the system, one at a time.
*/
printk(KERN_INFO "Number of CPUs detected: %d\n", num_cpus());
for_each_cpu_mask(cpu, cpu_present_map) {
/* The bootstrap CPU (that's us) is already booted. */
if (cpu == 0) {
cpu_set(cpu, cpu_online_map);
continue;
}
printk(KERN_DEBUG "Booting CPU %u.\n", cpu);
arch_boot_cpu(cpu);
/* Wait for ACK that CPU has booted (5 seconds max). */
for (timeout = 0; timeout < 50000; timeout++) {
if (cpu_isset(cpu, cpu_online_map))
break;
udelay(100);
}
if (!cpu_isset(cpu, cpu_online_map))
panic("Failed to boot CPU %d.\n", cpu);
}
/*
* Initialize the PCI subsystem.
*/
init_pci();
/*
* Enable external interrupts.
*/
local_irq_enable();
#ifdef CONFIG_NETWORK
/*
* Bring up any network devices.
*/
netdev_init();
#endif
#ifdef CONFIG_CRAY_GEMINI
driver_init_list("net", "gemini");
#endif
#ifdef CONFIG_BLOCK_DEVICE
/**
* Initialize the block devices
*/
blkdev_init();
#endif
mcheck_init_late();
/*
* And any modules that need to be started.
*/
driver_init_by_name( "module", "*" );
#ifdef CONFIG_KGDB
/*
* Stop eary (before "late" devices) in KGDB if requested
*/
kgdb_initial_breakpoint();
#endif
/*
* Bring up any late init devices.
*/
driver_init_by_name( "late", "*" );
/*
* Bring up the Linux compatibility layer, if enabled.
*/
linux_init();
#ifdef CONFIG_DEBUG_HW_NOISE
/* Measure noise/interference in the underlying hardware/VMM */
extern void measure_noise(int, uint64_t);
measure_noise(0, 0);
#endif
/*
* Start up user-space...
*/
printk(KERN_INFO "Loading initial user-level task (init_task)...\n");
if ((status = create_init_task()) != 0)
panic("Failed to create init_task (status=%d).", status);
current->state = TASK_EXITED;
schedule(); /* This should not return */
BUG();
}
asmlinkage void start_kernel(void)
{
char * command_line;
/*
* This little check will move.
*/
#ifdef __SMP__
static int first_cpu=1;
if(!first_cpu)
start_secondary();
first_cpu=0;
#endif
/*
* Interrupts are still disabled. Do necessary setups, then
* enable them
*/
setup_arch(&command_line, &memory_start, &memory_end);
memory_start = paging_init(memory_start,memory_end);
trap_init();
#ifndef CONFIG_OSFMACH3
init_IRQ();
#endif /* CONFIG_OSFMACH3 */
sched_init();
time_init();
parse_options(command_line);
#ifdef CONFIG_MODULES
init_modules();
#endif
#ifdef CONFIG_PROFILE
if (!prof_shift)
#ifdef CONFIG_PROFILE_SHIFT
prof_shift = CONFIG_PROFILE_SHIFT;
#else
prof_shift = 2;
#endif
#endif
if (prof_shift) {
prof_buffer = (unsigned int *) memory_start;
/* only text is profiled */
prof_len = (unsigned long) &_etext - (unsigned long) &_stext;
prof_len >>= prof_shift;
memory_start += prof_len * sizeof(unsigned int);
memset(prof_buffer, 0, prof_len * sizeof(unsigned int));
}
memory_start = console_init(memory_start,memory_end);
#ifdef CONFIG_PCI
memory_start = pci_init(memory_start,memory_end);
#endif
memory_start = kmalloc_init(memory_start,memory_end);
sti();
calibrate_delay();
memory_start = inode_init(memory_start,memory_end);
memory_start = file_table_init(memory_start,memory_end);
memory_start = name_cache_init(memory_start,memory_end);
#ifndef CONFIG_OSFMACH3
#ifdef CONFIG_BLK_DEV_INITRD
if (initrd_start && initrd_start < memory_start) {
printk(KERN_CRIT "initrd overwritten (0x%08lx < 0x%08lx) - "
"disabling it.\n",initrd_start,memory_start);
initrd_start = 0;
}
#endif
#endif /* CONFIG_OSFMACH3 */
mem_init(memory_start,memory_end);
buffer_init();
sock_init();
#if defined(CONFIG_SYSVIPC) || defined(CONFIG_KERNELD)
ipc_init();
#endif
dquot_init();
arch_syms_export();
sti();
check_bugs();
printk(linux_banner);
#ifdef __SMP__
smp_init();
#endif
sysctl_init();
/*
* We count on the initial thread going ok
* Like idlers init is an unlocked kernel thread, which will
* make syscalls (and thus be locked).
*/
#ifdef CONFIG_OSFMACH3
osfmach3_start_init(argv_init, envp_init);
#else /* CONFIG_OSFMACH3 */
kernel_thread(init, NULL, 0);
#endif /* CONFIG_OSFMACH3 */
/*
* task[0] is meant to be used as an "idle" task: it may not sleep, but
* it might do some general things like count free pages or it could be
* used to implement a reasonable LRU algorithm for the paging routines:
* anything that can be useful, but shouldn't take time from the real
* processes.
*
* Right now task[0] just does a infinite idle loop.
*/
cpu_idle(NULL);
}
asmlinkage void __init start_kernel(void)
{
char * command_line;
extern char saved_command_line[];
extern struct kernel_param __start___param[], __stop___param[];
#ifdef TARGET_OS2
LX_set_sysstate(LXSYSSTATE_KERNEL_BOOT_STARTED,0);
#endif
/*
* Interrupts are still disabled. Do necessary setups, then
* enable them
*/
lock_kernel();
page_address_init();
printk(linux_banner);
setup_arch(&command_line);
setup_per_cpu_areas();
/*
* Mark the boot cpu "online" so that it can call console drivers in
* printk() and can access its per-cpu storage.
*/
smp_prepare_boot_cpu();
build_all_zonelists();
page_alloc_init();
printk("Kernel command line: %s\n", saved_command_line);
#ifdef TARGET_OS2
parse_args("Booting kernel", command_line, __start___param,
0,
&unknown_bootoption);
#else
parse_args("Booting kernel", command_line, __start___param,
__stop___param - __start___param,
&unknown_bootoption);
#endif
sort_main_extable();
trap_init();
rcu_init();
init_IRQ();
pidhash_init();
sched_init();
softirq_init();
time_init();
/*
* HACK ALERT! This is early. We're enabling the console before
* we've done PCI setups etc, and console_init() must be aware of
* this. But we do want output early, in case something goes wrong.
*/
console_init();
if (panic_later)
panic(panic_later, panic_param);
profile_init();
local_irq_enable();
#ifdef CONFIG_BLK_DEV_INITRD
if (initrd_start && !initrd_below_start_ok &&
initrd_start < min_low_pfn << PAGE_SHIFT) {
printk(KERN_CRIT "initrd overwritten (0x%08lx < 0x%08lx) - "
"disabling it.\n",initrd_start,min_low_pfn << PAGE_SHIFT);
initrd_start = 0;
}
#endif
mem_init();
kmem_cache_init();
if (late_time_init)
late_time_init();
calibrate_delay();
pidmap_init();
pgtable_cache_init();
pte_chain_init();
#ifdef CONFIG_X86
if (efi_enabled)
efi_enter_virtual_mode();
#endif
fork_init(num_physpages);
proc_caches_init();
buffer_init();
unnamed_dev_init();
security_scaffolding_startup();
vfs_caches_init(num_physpages);
radix_tree_init();
signals_init();
/* rootfs populating might need page-writeback */
page_writeback_init();
#ifdef CONFIG_PROC_FS
proc_root_init();
#endif
check_bugs();
printk("POSIX conformance testing by UNIFIX\n");
/*
* We count on the initial thread going ok
* Like idlers init is an unlocked kernel thread, which will
* make syscalls (and thus be locked).
*/
init_idle(current, smp_processor_id());
/* Do the rest non-__init'ed, we're now alive */
rest_init();
}
/**
* This is the architecture-independent kernel entry point. Before it is
* called, architecture-specific code has done the bare minimum initialization
* necessary. This function initializes the kernel and its various subsystems.
* It calls back to architecture-specific code at several well defined points,
* which all architectures must implement (e.g., setup_arch()).
*/
void
start_kernel()
{
unsigned int cpu;
unsigned int timeout;
/*
* Parse the kernel boot command line.
* This is where boot-time configurable variables get set,
* e.g., the ones with param() and driver_param() specifiers.
*/
parse_params(lwk_command_line);
/*
* Initialize the console subsystem.
* printk()'s will be visible after this.
*/
console_init();
/*
* Hello, Dave.
*/
printk(lwk_banner);
printk(KERN_DEBUG "%s\n", lwk_command_line);
/*
* Do architecture specific initialization.
* This detects memory, CPUs, etc.
*/
setup_arch();
/*
* Initialize the kernel memory subsystem. Up until now, the simple
* boot-time memory allocator (bootmem) has been used for all dynamic
* memory allocation. Here, the bootmem allocator is destroyed and all
* of the free pages it was managing are added to the kernel memory
* pool (kmem) or the user memory pool (umem).
*
* After this point, any use of the bootmem allocator will cause a
* kernel panic. The normal kernel memory subsystem API should be used
* instead (e.g., kmem_alloc() and kmem_free()).
*/
mem_subsys_init();
/*
* Initialize the address space management subsystem.
*/
aspace_subsys_init();
/*
* Initialize the task management subsystem.
*/
task_subsys_init();
/*
* Initialize the task scheduling subsystem.
*/
sched_subsys_init();
/*
* Initialize the task scheduling subsystem.
*/
timer_subsys_init();
/*
* Boot all of the other CPUs in the system, one at a time.
*/
printk(KERN_INFO "Number of CPUs detected: %d\n", num_cpus());
for_each_cpu_mask(cpu, cpu_present_map) {
/* The bootstrap CPU (that's us) is already booted. */
if (cpu == 0) {
cpu_set(cpu, cpu_online_map);
continue;
}
printk(KERN_DEBUG "Booting CPU %u.\n", cpu);
arch_boot_cpu(cpu);
/* Wait for ACK that CPU has booted (5 seconds max). */
for (timeout = 0; timeout < 50000; timeout++) {
if (cpu_isset(cpu, cpu_online_map))
break;
udelay(100);
}
if (!cpu_isset(cpu, cpu_online_map))
panic("Failed to boot CPU %d.\n", cpu);
}
#ifdef CONFIG_V3VEE
v3vee_run_vmm();
printk( "%s: VMM returned. We're spinning\n", __func__ );
while(1) { asm( "hlt" ); }
#else
/*
* Start up user-space...
*/
printk(KERN_INFO "Loading initial user-level task (init_task)...\n");
int status;
if ((status = create_init_task()) != 0)
panic("Failed to create init_task (status=%d).", status);
schedule(); /* This should not return */
BUG();
#endif
}
asmlinkage void __init start_kernel(void)
{
char * command_line;
#ifdef __SMP__
static int boot_cpu = 1;
/* "current" has been set up, we need to load it now */
if (!boot_cpu)
initialize_secondary();
boot_cpu = 0;
#endif
/*
* Interrupts are still disabled. Do necessary setups, then
* enable them
*/
printk(linux_banner);
setup_arch(&command_line, &memory_start, &memory_end);
memory_start = paging_init(memory_start,memory_end);
trap_init();
init_IRQ();
sched_init();
time_init();
parse_options(command_line);
/*
* HACK ALERT! This is early. We're enabling the console before
* we've done PCI setups etc, and console_init() must be aware of
* this. But we do want output early, in case something goes wrong.
*/
memory_start = console_init(memory_start,memory_end);
#ifdef CONFIG_MODULES
init_modules();
#endif
if (prof_shift) {
prof_buffer = (unsigned int *) memory_start;
/* only text is profiled */
prof_len = (unsigned long) &_etext - (unsigned long) &_stext;
prof_len >>= prof_shift;
memory_start += prof_len * sizeof(unsigned int);
memset(prof_buffer, 0, prof_len * sizeof(unsigned int));
}
#ifdef CONFIG_REMOTE_DEBUG
set_debug_traps();
/* breakpoint(); */ /* execute a BREAK insn */
#endif
memory_start = kmem_cache_init(memory_start, memory_end);
sti();
calibrate_delay();
#ifdef CONFIG_CPU_R5900
r5900_init();
#endif
#ifdef CONFIG_BLK_DEV_INITRD
if (initrd_start && !initrd_below_start_ok && initrd_start < memory_start) {
printk(KERN_CRIT "initrd overwritten (0x%08lx < 0x%08lx) - "
"disabling it.\n",initrd_start,memory_start);
initrd_start = 0;
}
#endif
#ifdef CONFIG_BINFMT_IRIX
init_inventory ();
#endif
mem_init(memory_start,memory_end);
kmem_cache_sizes_init();
#ifdef CONFIG_PROC_FS
proc_root_init();
#endif
uidcache_init();
filescache_init();
dcache_init();
vma_init();
buffer_init();
signals_init();
inode_init();
file_table_init();
#if defined(CONFIG_SYSVIPC)
ipc_init();
#endif
#if defined(CONFIG_QUOTA)
dquot_init_hash();
#endif
check_bugs();
printk("POSIX conformance testing by UNIFIX\n");
/*
* We count on the initial thread going ok
* Like idlers init is an unlocked kernel thread, which will
* make syscalls (and thus be locked).
*/
smp_init();
kernel_thread(init, NULL, CLONE_FS | CLONE_FILES | CLONE_SIGHAND);
current->need_resched = 1;
cpu_idle(NULL);
}
asmlinkage void __init start_kernel(void)
{
char * command_line;
extern struct kernel_param __start___param[], __stop___param[];
#ifdef CONFIG_RTAI_RTSPMM
unsigned int indice_part;
/* Size of the needed memory block by the configuration */
unsigned long rt_mem_block_size = 0;
#endif
/*
* Interrupts are still disabled. Do necessary setups, then
* enable them
*/
lock_kernel();
page_address_init();
printk(linux_banner);
setup_arch(&command_line);
setup_per_cpu_areas();
/*
* Mark the boot cpu "online" so that it can call console drivers in
* printk() and can access its per-cpu storage.
*/
smp_prepare_boot_cpu();
/*
* Set up the scheduler prior starting any interrupts (such as the
* timer interrupt). Full topology setup happens at smp_init()
* time - but meanwhile we still have a functioning scheduler.
*/
sched_init();
/*
* Disable preemption - early bootup scheduling is extremely
* fragile until we cpu_idle() for the first time.
*/
preempt_disable();
build_all_zonelists();
page_alloc_init();
early_init_hardirqs();
printk("Kernel command line: %s\n", saved_command_line);
parse_early_param();
parse_args("Booting kernel", command_line, __start___param,
__stop___param - __start___param,
&unknown_bootoption);
sort_main_extable();
trap_init();
rcu_init();
init_IRQ();
pidhash_init();
init_timers();
softirq_init();
time_init();
/*
* HACK ALERT! This is early. We're enabling the console before
* we've done PCI setups etc, and console_init() must be aware of
* this. But we do want output early, in case something goes wrong.
*/
console_init();
if (panic_later)
panic(panic_later, panic_param);
#ifdef CONFIG_RTAI_RTSPMM
/* Allocate a big and continuous memory block for the module SPMM
included in the RTAI functionalities */
printk("--- Memory Allocation for the module rt_spmm ---\n");
/* WARNING
We need to add some space for the structures vrtxptext and vrtxpt and the partitions bitmap
that the module rt_spmm uses to handle the blocks in each partition */
/* for each defined partitions */
for(indice_part = 0; indice_part < RT_MAX_PART_NUM; indice_part ++)
{
if ((rt_partitions_table[indice_part].block_size != 0) &&
(rt_partitions_table[indice_part].num_of_blocks != 0))
{
rt_partitions_table[indice_part].part_size =
(rt_partitions_table[indice_part].block_size + XN_NBBY)
*rt_partitions_table[indice_part].num_of_blocks +
+ sizeof(vrtxptext_t)+sizeof(vrtxpt_t);
rt_mem_block_size += rt_partitions_table[indice_part].part_size;
}
}
#ifdef CONFIG_RTAI_PART_DMA
printk("Allocate memory in the low part of memory\n");
rt_mem_block_ptr=(void*)alloc_bootmem_low(rt_mem_block_size + PAGE_SIZE-1);
#else
printk("Allocate memory in the standard part of memory\n");
rt_mem_block_ptr=(void*)alloc_bootmem(rt_mem_block_size + PAGE_SIZE-1);
#endif /* CONFIG_PART_DMA */
printk("Needed Memory Size : %lu\n", rt_mem_block_size);
printk("Allocated Memory Size : %lu\n", rt_mem_block_size + PAGE_SIZE-1);
printk("Memory block address : 0x%x\n", (unsigned int)rt_mem_block_ptr);
printk("-----------------------------------------------\n");
#endif /* CONFIG_RTAI_RTSPMM */
profile_init();
local_irq_enable();
#ifdef CONFIG_BLK_DEV_INITRD
if (initrd_start && !initrd_below_start_ok &&
initrd_start < min_low_pfn << PAGE_SHIFT) {
printk(KERN_CRIT "initrd overwritten (0x%08lx < 0x%08lx) - "
"disabling it.\n",initrd_start,min_low_pfn << PAGE_SHIFT);
initrd_start = 0;
}
#endif
vfs_caches_init_early();
mem_init();
kmem_cache_init();
numa_policy_init();
if (late_time_init)
late_time_init();
calibrate_delay();
pidmap_init();
pgtable_cache_init();
prio_tree_init();
anon_vma_init();
#ifdef CONFIG_X86
if (efi_enabled)
efi_enter_virtual_mode();
#endif
fork_init(num_physpages);
proc_caches_init();
buffer_init();
unnamed_dev_init();
security_init();
vfs_caches_init(num_physpages);
#ifdef CONFIG_MOT_FEAT_DEVICE_TREE
mothwcfg_init();
#endif /* CONFIG_MOT_FEAT_DEVICE_TREE */
radix_tree_init();
signals_init();
/* rootfs populating might need page-writeback */
page_writeback_init();
#ifdef CONFIG_PROC_FS
proc_root_init();
#endif
check_bugs();
acpi_early_init(); /* before LAPIC and SMP init */
/* Do the rest non-__init'ed, we're now alive */
rest_init();
}
asmlinkage void __init start_kernel(void)
{
char * command_line;
/*
* Interrupts are still disabled. Do necessary setups, then
* enable them
*/
lock_kernel();
page_address_init();
printk(KERN_NOTICE);
printk(linux_banner);
setup_arch(&command_line);
setup_per_cpu_areas();
/*
* Mark the boot cpu "online" so that it can call console drivers in
* printk() and can access its per-cpu storage.
*/
smp_prepare_boot_cpu();
/*
* Set up the scheduler prior starting any interrupts (such as the
* timer interrupt). Full topology setup happens at smp_init()
* time - but meanwhile we still have a functioning scheduler.
*/
sched_init();
/*
* Disable preemption - early bootup scheduling is extremely
* fragile until we cpu_idle() for the first time.
*/
preempt_disable();
build_all_zonelists();
page_alloc_init();
printk(KERN_NOTICE "Kernel command line: %s\n", saved_command_line);
parse_early_param();
parse_args("Booting kernel", command_line, __kernel_param_list_ptr,
kparam_list_count(),
&unknown_bootoption);
sort_main_extable();
#ifdef CONFIG_LTT
ltt_init();
#endif //CONFIG_LTT
trap_init();
rcu_init();
init_IRQ();
pidhash_init();
init_timers();
hrtimers_init();
softirq_init();
time_init();
/*
* HACK ALERT! This is early. We're enabling the console before
* we've done PCI setups etc, and console_init() must be aware of
* this. But we do want output early, in case something goes wrong.
*/
console_init();
if (panic_later)
panic(panic_later, panic_param);
profile_init();
local_irq_enable();
#ifdef CONFIG_BLK_DEV_INITRD
if (initrd_start && !initrd_below_start_ok &&
initrd_start < min_low_pfn << PAGE_SHIFT) {
printk(KERN_CRIT "initrd overwritten (0x%08lx < 0x%08lx) - "
"disabling it.\n",initrd_start,min_low_pfn << PAGE_SHIFT);
initrd_start = 0;
}
#endif
vfs_caches_init_early();
mem_init();
kmem_cache_init();
setup_per_cpu_pageset();
numa_policy_init();
if (late_time_init)
late_time_init();
calibrate_delay();
pidmap_init();
pgtable_cache_init();
prio_tree_init();
anon_vma_init();
#ifdef CONFIG_X86
if (efi_enabled)
efi_enter_virtual_mode();
#endif
fork_init(num_physpages);
proc_caches_init();
buffer_init();
unnamed_dev_init();
key_init();
security_init();
vfs_caches_init(num_physpages);
radix_tree_init();
signals_init();
/* rootfs populating might need page-writeback */
page_writeback_init();
#ifdef CONFIG_PROC_FS
proc_root_init();
#endif
cpuset_init();
check_bugs();
acpi_early_init(); /* before LAPIC and SMP init */
/* Do the rest non-__init'ed, we're now alive */
rest_init();
}
