static __init void parse_cmdline_early (char ** cmdline_p)
{
char c = ' ', *to = command_line, *from = COMMAND_LINE;
int len = 0;
for (;;) {
if (c != ' ')
goto next_char;
else if (!memcmp(from, "avoid_smi", 9))
avoid_smi = 1;
#ifdef CONFIG_SMP
/*
* If the BIOS enumerates physical processors before logical,
* maxcpus=N at enumeration-time can be used to disable HT.
*/
else if (!memcmp(from, "maxcpus=", 8)) {
extern unsigned int maxcpus;
maxcpus = simple_strtoul(from + 8, NULL, 0);
}
#endif
#ifdef CONFIG_ACPI
/* "acpi=off" disables both ACPI table parsing and interpreter init */
if (fullarg(from,"acpi=off"))
disable_acpi();
if (fullarg(from, "acpi=force")) {
/* add later when we do DMI horrors: */
acpi_force = 1;
acpi_disabled = 0;
}
/* acpi=ht just means: do ACPI MADT parsing
at bootup, but don't enable the full ACPI interpreter */
if (fullarg(from, "acpi=ht")) {
if (!acpi_force)
disable_acpi();
acpi_ht = 1;
}
else if (fullarg(from, "pci=noacpi"))
acpi_disable_pci();
else if (fullarg(from, "acpi=noirq"))
acpi_noirq_set();
else if (fullarg(from, "acpi_sci=edge"))
acpi_sci_flags.trigger = 1;
else if (fullarg(from, "acpi_sci=level"))
acpi_sci_flags.trigger = 3;
else if (fullarg(from, "acpi_sci=high"))
acpi_sci_flags.polarity = 1;
else if (fullarg(from, "acpi_sci=low"))
acpi_sci_flags.polarity = 3;
/* acpi=strict disables out-of-spec workarounds */
else if (fullarg(from, "acpi=strict")) {
acpi_strict = 1;
}
#ifdef CONFIG_X86_IO_APIC
else if (fullarg(from, "acpi_skip_timer_override"))
acpi_skip_timer_override = 1;
#endif
#endif
if (fullarg(from, "disable_timer_pin_1"))
disable_timer_pin_1 = 1;
if (fullarg(from, "enable_timer_pin_1"))
disable_timer_pin_1 = -1;
if (fullarg(from, "nolapic") || fullarg(from, "disableapic")) {
clear_bit(X86_FEATURE_APIC, boot_cpu_data.x86_capability);
disable_apic = 1;
}
if (fullarg(from, "noapic"))
skip_ioapic_setup = 1;
if (fullarg(from,"apic")) {
skip_ioapic_setup = 0;
ioapic_force = 1;
}
if (!memcmp(from, "mem=", 4))
parse_memopt(from+4, &from);
if (!memcmp(from, "memmap=", 7)) {
parse_memmapopt(from+7, &from);
}
if (!memcmp(from, "bootmem_debug", 13))
bootmem_debug = 1;
#ifdef CONFIG_NUMA
if (!memcmp(from, "numa=", 5))
numa_setup(from+5);
#endif
if (!memcmp(from,"iommu=",6)) {
iommu_setup(from+6);
}
if (fullarg(from,"oops=panic"))
panic_on_oops = 1;
if (!memcmp(from, "noexec=", 7))
nonx_setup(from + 7);
#ifdef CONFIG_KEXEC
/* crashkernel=size@addr specifies the location to reserve for
* a crash kernel. By reserving this memory we guarantee
* that linux never set's it up as a DMA target.
* Useful for holding code to do something appropriate
* after a kernel panic.
*/
else if (!memcmp(from, "crashkernel=", 12)) {
unsigned long size, base;
size = memparse(from+12, &from);
if (*from == '@') {
base = memparse(from+1, &from);
crashk_res.start = base;
crashk_res.end = base + size - 1;
}
}
#endif
#ifdef CONFIG_PROC_VMCORE
/* elfcorehdr= specifies the location of elf core header
* stored by the crashed kernel. This option will be passed
* by kexec loader to the capture kernel.
*/
else if(!memcmp(from, "elfcorehdr=", 11))
elfcorehdr_addr = memparse(from+11, &from);
#endif
#ifdef CONFIG_HOTPLUG_CPU
else if (!memcmp(from, "additional_cpus=", 16))
setup_additional_cpus(from+16);
#endif
else if (!memcmp(from, "ipmi_dev_order=", 15))
ipmi_dev_order = simple_strtoul(from + 15, NULL, 0);
else if (!memcmp(from, "nosmp", 5))
nosmp(NULL);
next_char:
c = *(from++);
if (!c)
break;
if (COMMAND_LINE_SIZE <= ++len)
break;
*(to++) = c;
}
*to = '\0';
*cmdline_p = command_line;
}
/* 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);
}
static __init void parse_cmdline_early (char ** cmdline_p)
{
char c = ' ', *to = command_line, *from = COMMAND_LINE;
int len = 0;
/* Save unparsed command line copy for /proc/cmdline */
memcpy(saved_command_line, COMMAND_LINE, COMMAND_LINE_SIZE);
saved_command_line[COMMAND_LINE_SIZE-1] = '\0';
for (;;) {
if (c != ' ')
goto next_char;
#ifdef CONFIG_SMP
/*
* If the BIOS enumerates physical processors before logical,
* maxcpus=N at enumeration-time can be used to disable HT.
*/
else if (!memcmp(from, "maxcpus=", 8)) {
extern unsigned int maxcpus;
maxcpus = simple_strtoul(from + 8, NULL, 0);
}
#endif
#ifdef CONFIG_ACPI_BOOT
/* "acpi=off" disables both ACPI table parsing and interpreter init */
if (!memcmp(from, "acpi=off", 8))
disable_acpi();
if (!memcmp(from, "acpi=force", 10)) {
/* add later when we do DMI horrors: */
/* acpi_force = 1; */
acpi_disabled = 0;
}
/* acpi=ht just means: do ACPI MADT parsing
at bootup, but don't enable the full ACPI interpreter */
if (!memcmp(from, "acpi=ht", 7)) {
/* if (!acpi_force) */
disable_acpi();
acpi_ht = 1;
}
else if (!memcmp(from, "pci=noacpi", 10))
acpi_disable_pci();
else if (!memcmp(from, "acpi=noirq", 10))
acpi_noirq_set();
else if (!memcmp(from, "acpi_sci=edge", 13))
acpi_sci_flags.trigger = 1;
else if (!memcmp(from, "acpi_sci=level", 14))
acpi_sci_flags.trigger = 3;
else if (!memcmp(from, "acpi_sci=high", 13))
acpi_sci_flags.polarity = 1;
else if (!memcmp(from, "acpi_sci=low", 12))
acpi_sci_flags.polarity = 3;
/* acpi=strict disables out-of-spec workarounds */
else if (!memcmp(from, "acpi=strict", 11)) {
acpi_strict = 1;
}
#endif
if (!memcmp(from, "nolapic", 7) ||
!memcmp(from, "disableapic", 11))
disable_apic = 1;
if (!memcmp(from, "noapic", 6))
skip_ioapic_setup = 1;
if (!memcmp(from, "apic", 4)) {
skip_ioapic_setup = 0;
ioapic_force = 1;
}
if (!memcmp(from, "mem=", 4))
parse_memopt(from+4, &from);
#ifdef CONFIG_DISCONTIGMEM
if (!memcmp(from, "numa=", 5))
numa_setup(from+5);
#endif
#ifdef CONFIG_GART_IOMMU
if (!memcmp(from,"iommu=",6)) {
iommu_setup(from+6);
}
#endif
if (!memcmp(from,"oops=panic", 10))
panic_on_oops = 1;
next_char:
c = *(from++);
if (!c)
break;
if (COMMAND_LINE_SIZE <= ++len)
break;
*(to++) = c;
}
*to = '\0';
*cmdline_p = command_line;
}
