/**
* 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();
}
static void bios_init(void)
{
KDEBUG(("bios_init()\n"));
/* initialize Native Features, if available
* do it as soon as possible so that kprintf can make use of them
*/
#if DETECT_NATIVE_FEATURES
KDEBUG(("natfeat_init()\n"));
natfeat_init();
#endif
#if STONX_NATIVE_PRINT
KDEBUG(("stonx_kprintf_init()\n"));
stonx_kprintf_init();
#endif
#if CONF_WITH_UAE
KDEBUG(("amiga_uaelib_init()\n"));
amiga_uaelib_init();
#endif
/* Initialize the processor */
KDEBUG(("processor_init()\n"));
processor_init(); /* Set CPU type, longframe and FPU type */
KDEBUG(("vecs_init()\n"));
vecs_init(); /* setup all exception vectors (above) */
KDEBUG(("init_delay()\n"));
init_delay(); /* set 'reasonable' default values for delay */
/* Detect optional hardware (video, sound, etc.) */
KDEBUG(("machine_detect()\n"));
machine_detect(); /* detect hardware */
KDEBUG(("machine_init()\n"));
machine_init(); /* initialise machine-specific stuff */
/* Initialize the screen */
KDEBUG(("screen_init()\n"));
screen_init(); /* detect monitor type, ... */
/* Initialize the BIOS memory management */
KDEBUG(("bmem_init()\n"));
bmem_init(); /* this must be done after screen_init() */
KDEBUG(("cookie_init()\n"));
cookie_init(); /* sets a cookie jar */
KDEBUG(("fill_cookie_jar()\n"));
fill_cookie_jar(); /* detect hardware features and fill the cookie jar */
/* Set up the BIOS console output */
KDEBUG(("linea_init()\n"));
linea_init(); /* initialize screen related line-a variables */
font_init(); /* initialize font ring (requires cookie_akp) */
font_set_default(-1);/* set default font */
vt52_init(); /* initialize the vt52 console */
/* Now kcprintf() will also send debug info to the screen */
KDEBUG(("after vt52_init()\n"));
/* misc. variables */
dumpflg = -1;
sysbase = (LONG) os_entry;
savptr = (LONG) trap_save_area;
etv_timer = (void(*)(int)) just_rts;
etv_critic = default_etv_critic;
etv_term = just_rts;
/* setup VBL queue */
nvbls = 8;
vblqueue = vbl_list;
{
int i;
for(i = 0 ; i < 8 ; i++) {
vbl_list[i] = 0;
}
}
#if CONF_WITH_MFP
KDEBUG(("mfp_init()\n"));
mfp_init();
#endif
#if CONF_WITH_TT_MFP
if (has_tt_mfp)
{
KDEBUG(("tt_mfp_init()\n"));
tt_mfp_init();
}
#endif
/* Initialize the system 200 Hz timer */
KDEBUG(("init_system_timer()\n"));
init_system_timer();
/* Initialize the RS-232 port(s) */
KDEBUG(("chardev_init()\n"));
chardev_init(); /* Initialize low-memory bios vectors */
boot_status |= CHARDEV_AVAILABLE; /* track progress */
KDEBUG(("init_serport()\n"));
init_serport();
boot_status |= RS232_AVAILABLE; /* track progress */
#if CONF_WITH_SCC
if (has_scc)
boot_status |= SCC_AVAILABLE; /* track progress */
#endif
/* The sound init must be done before allowing MFC interrupts,
* because of dosound stuff in the timer C interrupt routine.
*/
#if CONF_WITH_DMASOUND
KDEBUG(("dmasound_init()\n"));
dmasound_init();
#endif
KDEBUG(("snd_init()\n"));
snd_init(); /* Reset Soundchip, deselect floppies */
/* Init the two ACIA devices (MIDI and KBD). The three actions below can
* be done in any order provided they happen before allowing MFP
* interrupts.
*/
KDEBUG(("kbd_init()\n"));
kbd_init(); /* init keyboard, disable mouse and joystick */
KDEBUG(("midi_init()\n"));
midi_init(); /* init MIDI acia so that kbd acia irq works */
KDEBUG(("init_acia_vecs()\n"));
init_acia_vecs(); /* Init the ACIA interrupt vector and related stuff */
KDEBUG(("after init_acia_vecs()\n"));
boot_status |= MIDI_AVAILABLE; /* track progress */
/* Now we can enable the interrupts.
* We need a timer for DMA timeouts in floppy and harddisk initialisation.
* The VBL processing will be enabled later with the vblsem semaphore.
*/
#if CONF_WITH_ATARI_VIDEO
/* Keep the HBL disabled */
set_sr(0x2300);
#else
set_sr(0x2000);
#endif
KDEBUG(("calibrate_delay()\n"));
calibrate_delay(); /* determine values for delay() function */
/* - requires interrupts to be enabled */
KDEBUG(("blkdev_init()\n"));
blkdev_init(); /* floppy and harddisk initialisation */
KDEBUG(("after blkdev_init()\n"));
/* initialize BIOS components */
KDEBUG(("parport_init()\n"));
parport_init(); /* parallel port */
//mouse_init(); /* init mouse driver */
KDEBUG(("clock_init()\n"));
clock_init(); /* init clock */
KDEBUG(("after clock_init()\n"));
#if CONF_WITH_NLS
KDEBUG(("nls_init()\n"));
nls_init(); /* init native language support */
nls_set_lang(get_lang_name());
#endif
/* set start of user interface */
#if WITH_AES
exec_os = ui_start;
#elif WITH_CLI
exec_os = coma_start;
#else
exec_os = NULL;
#endif
KDEBUG(("osinit()\n"));
osinit(); /* initialize BDOS */
KDEBUG(("after osinit()\n"));
boot_status |= DOS_AVAILABLE; /* track progress */
/* Enable VBL processing */
vblsem = 1;
#if CONF_WITH_CARTRIDGE
{
WORD save_hz = v_hz_rez, save_vt = v_vt_rez, save_pl = v_planes;
/* Run all boot applications from the application cartridge.
* Beware: Hatari features a special cartridge which is used
* for GEMDOS drive emulation. It will hack drvbits and hook Pexec().
* It will also hack Line A variables to enable extended VDI video modes.
*/
KDEBUG(("run_cartridge_applications(3)\n"));
run_cartridge_applications(3); /* Type "Execute prior to bootdisk" */
KDEBUG(("after run_cartridge_applications()\n"));
if ((v_hz_rez != save_hz) || (v_vt_rez != save_vt) || (v_planes != save_pl))
{
set_rez_hacked();
font_set_default(-1); /* set default font */
vt52_init(); /* initialize the vt52 console */
}
}
#endif
#if CONF_WITH_ALT_RAM
#if CONF_WITH_FASTRAM
/* add TT-RAM that was detected in memory.S */
if (ramtop != NULL)
{
KDEBUG(("xmaddalt()\n"));
xmaddalt(FASTRAM_START, ramtop - FASTRAM_START);
}
#endif
#if CONF_WITH_MONSTER
/* Add MonSTer alt-RAM detected in machine.c */
if (has_monster)
{
/* Dummy read from MonSTer register to initiate write sequence. */
unsigned short monster_reg = *(volatile unsigned short *)MONSTER_REG;
/* Only enable 6Mb when on a Mega STE due to address conflict with
VME bus. Todo: This should be made configurable. */
if (has_vme)
monster_reg = 6;
else
monster_reg = 8;
/* Register write sequence: read - write - write */
*(volatile unsigned short *)MONSTER_REG = monster_reg;
*(volatile unsigned short *)MONSTER_REG = monster_reg;
KDEBUG(("xmaddalt()\n"));
xmaddalt((UBYTE *)0x400000L, monster_reg*0x100000L);
}
#endif
#ifdef MACHINE_AMIGA
KDEBUG(("amiga_add_alt_ram()\n"));
amiga_add_alt_ram();
#endif
#endif /* CONF_WITH_ALT_RAM */
KDEBUG(("bios_init() end\n"));
}
