/* C entry point for boot CPU */
void __init start_xen(unsigned long boot_phys_offset,
unsigned long fdt_paddr,
unsigned long cpuid)
{
size_t fdt_size;
int cpus, i;
const char *cmdline;
setup_cache();
percpu_init_areas();
set_processor_id(0); /* needed early, for smp_processor_id() */
smp_clear_cpu_maps();
/* This is mapped by head.S */
device_tree_flattened = (void *)BOOT_FDT_VIRT_START
+ (fdt_paddr & ((1 << SECOND_SHIFT) - 1));
fdt_size = device_tree_early_init(device_tree_flattened, fdt_paddr);
cmdline = device_tree_bootargs(device_tree_flattened);
early_printk("Command line: %s\n", cmdline);
cmdline_parse(cmdline);
setup_pagetables(boot_phys_offset, get_xen_paddr());
setup_mm(fdt_paddr, fdt_size);
vm_init();
dt_unflatten_host_device_tree();
dt_irq_xlate = gic_irq_xlate;
dt_uart_init();
console_init_preirq();
system_state = SYS_STATE_boot;
processor_id();
platform_init();
smp_init_cpus();
cpus = smp_get_max_cpus();
init_xen_time();
gic_init();
set_current((struct vcpu *)0xfffff000); /* debug sanity */
idle_vcpu[0] = current;
init_traps();
setup_virt_paging();
p2m_vmid_allocator_init();
softirq_init();
tasklet_subsys_init();
init_IRQ();
gic_route_ppis();
gic_route_spis();
init_maintenance_interrupt();
init_timer_interrupt();
timer_init();
init_idle_domain();
rcu_init();
arch_init_memory();
local_irq_enable();
local_abort_enable();
smp_prepare_cpus(cpus);
initialize_keytable();
console_init_postirq();
do_presmp_initcalls();
for_each_present_cpu ( i )
{
if ( (num_online_cpus() < cpus) && !cpu_online(i) )
{
int ret = cpu_up(i);
if ( ret != 0 )
printk("Failed to bring up CPU %u (error %d)\n", i, ret);
}
}
printk("Brought up %ld CPUs\n", (long)num_online_cpus());
/* TODO: smp_cpus_done(); */
do_initcalls();
/* Create initial domain 0. */
dom0 = domain_create(0, 0, 0);
if ( IS_ERR(dom0) || (alloc_dom0_vcpu0() == NULL) )
panic("Error creating domain 0");
dom0->is_privileged = 1;
dom0->target = NULL;
if ( construct_dom0(dom0) != 0)
panic("Could not set up DOM0 guest OS");
/* Scrub RAM that is still free and so may go to an unprivileged domain. */
scrub_heap_pages();
init_constructors();
console_endboot();
/* Hide UART from DOM0 if we're using it */
serial_endboot();
system_state = SYS_STATE_active;
domain_unpause_by_systemcontroller(dom0);
/* Switch on to the dynamically allocated stack for the idle vcpu
* since the static one we're running on is about to be freed. */
memcpy(idle_vcpu[0]->arch.cpu_info, get_cpu_info(),
sizeof(struct cpu_info));
switch_stack_and_jump(idle_vcpu[0]->arch.cpu_info, init_done);
}
static void __init __start_xen(void)
{
memcpy(0, exception_vectors, exception_vectors_end - exception_vectors);
synchronize_caches(0, exception_vectors_end - exception_vectors);
ticks_per_usec = timebase_freq / 1000000ULL;
/* Parse the command-line options. */
cmdline_parse(xen_cmdline);
/* we need to be able to identify this CPU early on */
init_boot_cpu();
/* We initialise the serial devices very early so we can get debugging. */
ns16550.io_base = 0x3f8;
ns16550_init(0, &ns16550);
ns16550.io_base = 0x2f8;
ns16550_init(1, &ns16550);
serial_init_preirq();
init_console();
console_start_sync(); /* Stay synchronous for early debugging. */
rtas_init((void *)oftree);
memory_init();
printk("xen_cmdline: %016lx\n", (ulong)xen_cmdline);
printk("dom0_cmdline: %016lx\n", (ulong)dom0_cmdline);
printk("dom0_addr: %016lx\n", (ulong)dom0_addr);
printk("dom0_len: %016lx\n", (ulong)dom0_len);
printk("initrd_start: %016lx\n", (ulong)initrd_start);
printk("initrd_len: %016lx\n", (ulong)initrd_len);
printk("dom0: %016llx\n", *(unsigned long long *)dom0_addr);
#ifdef OF_DEBUG
key_ofdump(0);
#endif
percpu_init_areas();
init_parea(0);
cpu_initialize(0);
#ifdef CONFIG_GDB
initialise_gdb();
if (opt_earlygdb)
debugger_trap_immediate();
#endif
start_of_day();
acm_init(NULL, 0);
mpic_setup_this_cpu();
/* Deal with secondary processors. */
if (opt_nosmp || ofd_boot_cpu == -1) {
printk("nosmp: leaving secondary processors spinning forever\n");
} else {
printk("spinning up at most %d total processors ...\n", max_cpus);
kick_secondary_cpus(max_cpus);
}
/* This cannot be called before secondary cpus are marked online. */
percpu_free_unused_areas();
/* Create initial domain 0. */
dom0 = domain_create(0, 0, DOM0_SSIDREF);
if (dom0 == NULL)
panic("Error creating domain 0\n");
/* The Interrupt Controller will route everything to CPU 0 so we
* need to make sure Dom0's vVCPU 0 is pinned to the CPU */
dom0->vcpu[0]->cpu_affinity = cpumask_of_cpu(0);
dom0->is_privileged = 1;
/* scrub_heap_pages() requires IRQs enabled, and we're post IRQ setup... */
local_irq_enable();
/* Scrub RAM that is still free and so may go to an unprivileged domain. */
scrub_heap_pages();
if ((dom0_addr == 0) || (dom0_len == 0))
panic("No domain 0 found.\n");
if (construct_dom0(dom0, dom0_addr, dom0_len,
initrd_start, initrd_len,
dom0_cmdline) != 0) {
panic("Could not set up DOM0 guest OS\n");
}
init_xenheap_pages(ALIGN_UP(dom0_addr, PAGE_SIZE),
ALIGN_DOWN(dom0_addr + dom0_len, PAGE_SIZE));
if (initrd_start)
init_xenheap_pages(ALIGN_UP(initrd_start, PAGE_SIZE),
ALIGN_DOWN(initrd_start + initrd_len, PAGE_SIZE));
init_trace_bufs();
console_endboot();
/* Hide UART from DOM0 if we're using it */
serial_endboot();
console_end_sync();
domain_unpause_by_systemcontroller(dom0);
#ifdef DEBUG_IPI
ipi_torture_test();
#endif
startup_cpu_idle_loop();
}
/* C entry point for boot CPU */
void __init start_xen(unsigned long boot_phys_offset,
unsigned long fdt_paddr,
unsigned long cpuid)
{
size_t fdt_size;
int cpus, i;
paddr_t xen_paddr;
const char *cmdline;
struct bootmodule *xen_bootmodule;
struct domain *dom0;
struct xen_arch_domainconfig config;
setup_cache();
percpu_init_areas();
set_processor_id(0); /* needed early, for smp_processor_id() */
set_current((struct vcpu *)0xfffff000); /* debug sanity */
idle_vcpu[0] = current;
setup_virtual_regions(NULL, NULL);
/* Initialize traps early allow us to get backtrace when an error occurred */
init_traps();
smp_clear_cpu_maps();
/* This is mapped by head.S */
device_tree_flattened = (void *)BOOT_FDT_VIRT_START
+ (fdt_paddr & ((1 << SECOND_SHIFT) - 1));
fdt_size = boot_fdt_info(device_tree_flattened, fdt_paddr);
cmdline = boot_fdt_cmdline(device_tree_flattened);
printk("Command line: %s\n", cmdline);
cmdline_parse(cmdline);
/* Register Xen's load address as a boot module. */
xen_bootmodule = add_boot_module(BOOTMOD_XEN,
(paddr_t)(uintptr_t)(_start + boot_phys_offset),
(paddr_t)(uintptr_t)(_end - _start + 1), NULL);
BUG_ON(!xen_bootmodule);
xen_paddr = get_xen_paddr();
setup_pagetables(boot_phys_offset, xen_paddr);
/* Update Xen's address now that we have relocated. */
printk("Update BOOTMOD_XEN from %"PRIpaddr"-%"PRIpaddr" => %"PRIpaddr"-%"PRIpaddr"\n",
xen_bootmodule->start, xen_bootmodule->start + xen_bootmodule->size,
xen_paddr, xen_paddr + xen_bootmodule->size);
xen_bootmodule->start = xen_paddr;
setup_mm(fdt_paddr, fdt_size);
/* Parse the ACPI tables for possible boot-time configuration */
acpi_boot_table_init();
end_boot_allocator();
vm_init();
dt_unflatten_host_device_tree();
init_IRQ();
platform_init();
preinit_xen_time();
gic_preinit();
arm_uart_init();
console_init_preirq();
console_init_ring();
system_state = SYS_STATE_boot;
processor_id();
smp_init_cpus();
cpus = smp_get_max_cpus();
init_xen_time();
gic_init();
p2m_vmid_allocator_init();
softirq_init();
tasklet_subsys_init();
xsm_dt_init();
init_maintenance_interrupt();
init_timer_interrupt();
timer_init();
init_idle_domain();
rcu_init();
arch_init_memory();
local_irq_enable();
local_abort_enable();
smp_prepare_cpus(cpus);
initialize_keytable();
console_init_postirq();
do_presmp_initcalls();
for_each_present_cpu ( i )
{
if ( (num_online_cpus() < cpus) && !cpu_online(i) )
{
int ret = cpu_up(i);
if ( ret != 0 )
printk("Failed to bring up CPU %u (error %d)\n", i, ret);
}
}
printk("Brought up %ld CPUs\n", (long)num_online_cpus());
/* TODO: smp_cpus_done(); */
setup_virt_paging();
iommu_setup();
do_initcalls();
/*
* It needs to be called after do_initcalls to be able to use
* stop_machine (tasklets initialized via an initcall).
*/
apply_alternatives_all();
/* Create initial domain 0. */
/* The vGIC for DOM0 is exactly emulating the hardware GIC */
config.gic_version = XEN_DOMCTL_CONFIG_GIC_NATIVE;
config.nr_spis = gic_number_lines() - 32;
dom0 = domain_create(0, 0, 0, &config);
if ( IS_ERR(dom0) || (alloc_dom0_vcpu0(dom0) == NULL) )
panic("Error creating domain 0");
dom0->is_privileged = 1;
dom0->target = NULL;
if ( construct_dom0(dom0) != 0)
panic("Could not set up DOM0 guest OS");
/* Scrub RAM that is still free and so may go to an unprivileged domain. */
scrub_heap_pages();
init_constructors();
console_endboot();
/* Hide UART from DOM0 if we're using it */
serial_endboot();
system_state = SYS_STATE_active;
/* Must be done past setting system_state. */
unregister_init_virtual_region();
domain_unpause_by_systemcontroller(dom0);
/* Switch on to the dynamically allocated stack for the idle vcpu
* since the static one we're running on is about to be freed. */
memcpy(idle_vcpu[0]->arch.cpu_info, get_cpu_info(),
sizeof(struct cpu_info));
switch_stack_and_jump(idle_vcpu[0]->arch.cpu_info, init_done);
}