// Bootstrap processor starts running C code here.
// Allocate a real stack and switch to it, first
// doing some setup required for memory allocator to work.
int
main(void)
{
kinit1(end, P2V(4*1024*1024)); // phys page allocator
kvmalloc(); // kernel page table
mpinit(); // collect info about this machine
lapicinit(mpbcpu());
seginit(); // set up segments
cprintf("\ncpu%d: starting xv6\n\n", cpu->id);
picinit(); // interrupt controller
ioapicinit(); // another interrupt controller
consoleinit(); // I/O devices & their interrupts
uartinit(); // serial port
pinit(); // process table
tvinit(); // trap vectors
binit(); // buffer cache
fileinit(); // file table
iinit(); // inode cache
ideinit(); // disk
if(!ismp)
timerinit(); // uniprocessor timer
startothers(); // start other processors
kinit2(P2V(4*1024*1024), P2V(PHYSTOP)); // must come after startothers()
userinit(); // first user process
// Finish setting up this processor in mpmain.
mpmain();
}
// Bootstrap processor starts running C code here.
int
main(int memsize)
{
mpinit(); // collect info about this machine
lapicinit(mpbcpu());
ksegment();
picinit(); // interrupt controller
ioapicinit(); // another interrupt controller
consoleinit(); // I/O devices & their interrupts
uartinit(); // serial port
cprintf("cpus %p cpu %p\n", cpus, cpu);
cprintf("\ncpu%d: starting xv6\n\n", cpu->id);
cprintf("mem: %d kb\n", memsize);
kinit(memsize); // physical memory allocator
pinit(); // process table
tvinit(); // trap vectors
binit(); // buffer cache
fileinit(); // file table
iinit(); // inode cache
ideinit(); // disk
if(!ismp)
timerinit(); // uniprocessor timer
pageinit(); // enable paging
userinit(); // first user process
bootothers(); // start other processors
// Finish setting up this processor in mpmain.
mpmain();
}
// Bootstrap processor starts running C code here.
// Allocate a real stack and switch to it, first
// doing some setup required for memory allocator to work.
int
main(void)
{
kvmalloc(); // kernel page table
mpinit(); // collect info about this machine
lapicinit(mpbcpu());
seginit(); // set up segments
cprintf("\ncpu%d: starting xv6\n\n", cpu->id);
picinit(); // interrupt controller
ioapicinit(); // another interrupt controller
consoleinit(); // I/O devices & their interrupts
uartinit(); // serial port
pinit(); // process table
tvinit(); // trap vectors
binit(); // buffer cache
fileinit(); // file table
iinit(); // inode cache
ideinit(); // disk
if(!ismp)
timerinit(); // uniprocessor timer
startothers(); // start other processors (must come before kinit)
kinit(); // initialize memory allocator
userinit(); // first user process (must come after kinit)
// Finish setting up this processor in mpmain.
mpmain();
}
// Bootstrap processor gets here after setting up the hardware.
// Additional processors start here.
static void
mpmain(void)
{
if(cpunum() != mpbcpu())
lapicinit(cpunum());
ksegment();
cprintf("cpu%d: mpmain\n", cpu->id);
idtinit();
cpu->dir = kernel_dir;
enable_page(cpu->dir);
cprintf("-- mpmain -- cpu%d enable paging dir: %x \n", cpu->id, cpu->dir);
xchg(&cpu->booted, 1);
cprintf("cpu%d: scheduling\n", cpu->id);
scheduler();
}