/* 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);
}
void __init setup_arch(char **cmdline_p)
{
unsigned long kernel_end;
#if defined(CONFIG_XEN_PRIVILEGED_GUEST)
struct e820entry *machine_e820;
struct xen_memory_map memmap;
#endif
#ifdef CONFIG_XEN
/* Register a call for panic conditions. */
atomic_notifier_chain_register(&panic_notifier_list, &xen_panic_block);
ROOT_DEV = MKDEV(RAMDISK_MAJOR,0);
kernel_end = 0; /* dummy */
screen_info = SCREEN_INFO;
if (xen_start_info->flags & SIF_INITDOMAIN) {
/* This is drawn from a dump from vgacon:startup in
* standard Linux. */
screen_info.orig_video_mode = 3;
screen_info.orig_video_isVGA = 1;
screen_info.orig_video_lines = 25;
screen_info.orig_video_cols = 80;
screen_info.orig_video_ega_bx = 3;
screen_info.orig_video_points = 16;
} else
screen_info.orig_video_isVGA = 0;
edid_info = EDID_INFO;
saved_video_mode = SAVED_VIDEO_MODE;
bootloader_type = LOADER_TYPE;
#ifdef CONFIG_BLK_DEV_RAM
rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
#endif
setup_xen_features();
HYPERVISOR_vm_assist(VMASST_CMD_enable,
VMASST_TYPE_writable_pagetables);
ARCH_SETUP
#else
ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
screen_info = SCREEN_INFO;
edid_info = EDID_INFO;
saved_video_mode = SAVED_VIDEO_MODE;
bootloader_type = LOADER_TYPE;
#ifdef CONFIG_BLK_DEV_RAM
rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
#endif
#endif /* !CONFIG_XEN */
setup_memory_region();
copy_edd();
if (!MOUNT_ROOT_RDONLY)
root_mountflags &= ~MS_RDONLY;
init_mm.start_code = (unsigned long) &_text;
init_mm.end_code = (unsigned long) &_etext;
init_mm.end_data = (unsigned long) &_edata;
init_mm.brk = (unsigned long) &_end;
#ifndef CONFIG_XEN
code_resource.start = virt_to_phys(&_text);
code_resource.end = virt_to_phys(&_etext)-1;
data_resource.start = virt_to_phys(&_etext);
data_resource.end = virt_to_phys(&_edata)-1;
#endif
parse_cmdline_early(cmdline_p);
early_identify_cpu(&boot_cpu_data);
/*
* partially used pages are not usable - thus
* we are rounding upwards:
*/
end_pfn = e820_end_of_ram();
num_physpages = end_pfn; /* for pfn_valid */
check_efer();
#ifndef CONFIG_XEN
discover_ebda();
#endif
init_memory_mapping(0, (end_pfn_map << PAGE_SHIFT));
#ifdef CONFIG_ACPI_NUMA
/*
* Parse SRAT to discover nodes.
*/
acpi_numa_init();
#endif
#ifdef CONFIG_NUMA
numa_initmem_init(0, end_pfn);
#else
contig_initmem_init(0, end_pfn);
#endif
/* Reserve direct mapping */
reserve_bootmem_generic(table_start << PAGE_SHIFT,
(table_end - table_start) << PAGE_SHIFT);
/* reserve kernel */
kernel_end = round_up(__pa_symbol(&_end),PAGE_SIZE);
reserve_bootmem_generic(HIGH_MEMORY, kernel_end - HIGH_MEMORY);
#ifdef CONFIG_XEN
/* reserve physmap, start info and initial page tables */
reserve_bootmem(kernel_end, (table_start<<PAGE_SHIFT)-kernel_end);
#else
/*
* reserve physical page 0 - it's a special BIOS page on many boxes,
* enabling clean reboots, SMP operation, laptop functions.
*/
reserve_bootmem_generic(0, PAGE_SIZE);
/* reserve ebda region */
if (ebda_addr)
reserve_bootmem_generic(ebda_addr, ebda_size);
#endif
#ifdef CONFIG_SMP
/*
* But first pinch a few for the stack/trampoline stuff
* FIXME: Don't need the extra page at 4K, but need to fix
* trampoline before removing it. (see the GDT stuff)
*/
reserve_bootmem_generic(PAGE_SIZE, PAGE_SIZE);
/* Reserve SMP trampoline */
reserve_bootmem_generic(SMP_TRAMPOLINE_BASE, PAGE_SIZE);
#endif
#ifdef CONFIG_ACPI_SLEEP
/*
* Reserve low memory region for sleep support.
*/
acpi_reserve_bootmem();
#endif
#ifdef CONFIG_XEN
#ifdef CONFIG_BLK_DEV_INITRD
if (xen_start_info->mod_start) {
if (INITRD_START + INITRD_SIZE <= (end_pfn << PAGE_SHIFT)) {
/*reserve_bootmem_generic(INITRD_START, INITRD_SIZE);*/
initrd_start = INITRD_START + PAGE_OFFSET;
initrd_end = initrd_start+INITRD_SIZE;
initrd_below_start_ok = 1;
} else {
printk(KERN_ERR "initrd extends beyond end of memory "
"(0x%08lx > 0x%08lx)\ndisabling initrd\n",
(unsigned long)(INITRD_START + INITRD_SIZE),
(unsigned long)(end_pfn << PAGE_SHIFT));
initrd_start = 0;
}
}
#endif
#else /* CONFIG_XEN */
#ifdef CONFIG_BLK_DEV_INITRD
if (LOADER_TYPE && INITRD_START) {
if (INITRD_START + INITRD_SIZE <= (end_pfn << PAGE_SHIFT)) {
reserve_bootmem_generic(INITRD_START, INITRD_SIZE);
initrd_start =
INITRD_START ? INITRD_START + PAGE_OFFSET : 0;
initrd_end = initrd_start+INITRD_SIZE;
}
else {
printk(KERN_ERR "initrd extends beyond end of memory "
"(0x%08lx > 0x%08lx)\ndisabling initrd\n",
(unsigned long)(INITRD_START + INITRD_SIZE),
(unsigned long)(end_pfn << PAGE_SHIFT));
initrd_start = 0;
}
}
#endif
#endif /* !CONFIG_XEN */
#ifdef CONFIG_KEXEC
if (crashk_res.start != crashk_res.end) {
reserve_bootmem(crashk_res.start,
crashk_res.end - crashk_res.start + 1);
}
#endif
paging_init();
#ifdef CONFIG_X86_LOCAL_APIC
/*
* Find and reserve possible boot-time SMP configuration:
*/
find_smp_config();
#endif
#ifdef CONFIG_XEN
{
int i, j, k, fpp;
unsigned long va;
/* 'Initial mapping' of initrd must be destroyed. */
for (va = xen_start_info->mod_start;
va < (xen_start_info->mod_start+xen_start_info->mod_len);
va += PAGE_SIZE) {
HYPERVISOR_update_va_mapping(va, __pte_ma(0), 0);
}
if (!xen_feature(XENFEAT_auto_translated_physmap)) {
/* Make sure we have a large enough P->M table. */
phys_to_machine_mapping = alloc_bootmem(
end_pfn * sizeof(unsigned long));
memset(phys_to_machine_mapping, ~0,
end_pfn * sizeof(unsigned long));
memcpy(phys_to_machine_mapping,
(unsigned long *)xen_start_info->mfn_list,
xen_start_info->nr_pages * sizeof(unsigned long));
free_bootmem(
__pa(xen_start_info->mfn_list),
PFN_PHYS(PFN_UP(xen_start_info->nr_pages *
sizeof(unsigned long))));
/* Destroyed 'initial mapping' of old p2m table. */
for (va = xen_start_info->mfn_list;
va < (xen_start_info->mfn_list +
(xen_start_info->nr_pages*sizeof(unsigned long)));
va += PAGE_SIZE) {
HYPERVISOR_update_va_mapping(va, __pte_ma(0), 0);
}
/*
* Initialise the list of the frames that specify the
* list of frames that make up the p2m table. Used by
* save/restore.
*/
pfn_to_mfn_frame_list_list = alloc_bootmem(PAGE_SIZE);
HYPERVISOR_shared_info->arch.pfn_to_mfn_frame_list_list =
virt_to_mfn(pfn_to_mfn_frame_list_list);
fpp = PAGE_SIZE/sizeof(unsigned long);
for (i=0, j=0, k=-1; i< end_pfn; i+=fpp, j++) {
if ((j % fpp) == 0) {
k++;
BUG_ON(k>=fpp);
pfn_to_mfn_frame_list[k] =
alloc_bootmem(PAGE_SIZE);
pfn_to_mfn_frame_list_list[k] =
virt_to_mfn(pfn_to_mfn_frame_list[k]);
j=0;
}
pfn_to_mfn_frame_list[k][j] =
virt_to_mfn(&phys_to_machine_mapping[i]);
}
HYPERVISOR_shared_info->arch.max_pfn = end_pfn;
}
}
if (xen_start_info->flags & SIF_INITDOMAIN)
dmi_scan_machine();
if ( ! (xen_start_info->flags & SIF_INITDOMAIN))
{
acpi_disabled = 1;
#ifdef CONFIG_ACPI
acpi_ht = 0;
#endif
}
#endif
#ifndef CONFIG_XEN
check_ioapic();
#endif
zap_low_mappings(0);
/*
* set this early, so we dont allocate cpu0
* if MADT list doesnt list BSP first
* mpparse.c/MP_processor_info() allocates logical cpu numbers.
*/
cpu_set(0, cpu_present_map);
#ifdef CONFIG_ACPI
/*
* Initialize the ACPI boot-time table parser (gets the RSDP and SDT).
* Call this early for SRAT node setup.
*/
acpi_boot_table_init();
/*
* Read APIC and some other early information from ACPI tables.
*/
acpi_boot_init();
#endif
init_cpu_to_node();
#ifdef CONFIG_X86_LOCAL_APIC
/*
* get boot-time SMP configuration:
*/
if (smp_found_config)
get_smp_config();
#ifndef CONFIG_XEN
init_apic_mappings();
#endif
#endif
#if defined(CONFIG_XEN) && defined(CONFIG_SMP) && !defined(CONFIG_HOTPLUG_CPU)
prefill_possible_map();
#endif
/*
* Request address space for all standard RAM and ROM resources
* and also for regions reported as reserved by the e820.
*/
#if defined(CONFIG_XEN_PRIVILEGED_GUEST)
probe_roms();
if (xen_start_info->flags & SIF_INITDOMAIN) {
machine_e820 = alloc_bootmem_low_pages(PAGE_SIZE);
memmap.nr_entries = E820MAX;
set_xen_guest_handle(memmap.buffer, machine_e820);
BUG_ON(HYPERVISOR_memory_op(XENMEM_machine_memory_map, &memmap));
e820_reserve_resources(machine_e820, memmap.nr_entries);
}
#elif !defined(CONFIG_XEN)
probe_roms();
e820_reserve_resources(e820.map, e820.nr_map);
#endif
request_resource(&iomem_resource, &video_ram_resource);
{
unsigned i;
/* request I/O space for devices used on all i[345]86 PCs */
for (i = 0; i < STANDARD_IO_RESOURCES; i++)
request_resource(&ioport_resource, &standard_io_resources[i]);
}
#if defined(CONFIG_XEN_PRIVILEGED_GUEST)
if (xen_start_info->flags & SIF_INITDOMAIN) {
e820_setup_gap(machine_e820, memmap.nr_entries);
free_bootmem(__pa(machine_e820), PAGE_SIZE);
}
#elif !defined(CONFIG_XEN)
e820_setup_gap(e820.map, e820.nr_map);
#endif
#ifdef CONFIG_GART_IOMMU
iommu_hole_init();
#endif
#ifdef CONFIG_XEN
{
struct physdev_set_iopl set_iopl;
set_iopl.iopl = 1;
HYPERVISOR_physdev_op(PHYSDEVOP_set_iopl, &set_iopl);
if (xen_start_info->flags & SIF_INITDOMAIN) {
if (!(xen_start_info->flags & SIF_PRIVILEGED))
panic("Xen granted us console access "
"but not privileged status");
#ifdef CONFIG_VT
#if defined(CONFIG_VGA_CONSOLE)
conswitchp = &vga_con;
#elif defined(CONFIG_DUMMY_CONSOLE)
conswitchp = &dummy_con;
#endif
#endif
} else {
extern int console_use_vt;
console_use_vt = 0;
}
}
#else /* CONFIG_XEN */
#ifdef CONFIG_VT
#if defined(CONFIG_VGA_CONSOLE)
conswitchp = &vga_con;
#elif defined(CONFIG_DUMMY_CONSOLE)
conswitchp = &dummy_con;
#endif
#endif
#endif /* !CONFIG_XEN */
}
void __init setup_arch(char **cmdline_p)
{
printk(KERN_INFO "Command line: %s\n", saved_command_line);
ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
screen_info = SCREEN_INFO;
edid_info = EDID_INFO;
saved_video_mode = SAVED_VIDEO_MODE;
bootloader_type = LOADER_TYPE;
#ifdef CONFIG_BLK_DEV_RAM
rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
#endif
#ifdef CONFIG_EFI
if (!strncmp(EFI_LOADER_SIG, "EFIL", 4))
efi_enabled = 1;
#endif
setup_memory_region();
copy_edd();
if (!MOUNT_ROOT_RDONLY)
root_mountflags &= ~MS_RDONLY;
init_mm.start_code = (unsigned long) &_text;
init_mm.end_code = (unsigned long) &_etext;
init_mm.end_data = (unsigned long) &_edata;
init_mm.brk = (unsigned long) &_end;
init_mm.pgd = __va(__pa_symbol(&init_level4_pgt));
code_resource.start = __pa_symbol(&_text);
code_resource.end = __pa_symbol(&_etext)-1;
data_resource.start = __pa_symbol(&_etext);
data_resource.end = __pa_symbol(&_edata)-1;
parse_cmdline_early(cmdline_p);
finish_e820_parsing();
early_identify_cpu(&boot_cpu_data);
/*
* partially used pages are not usable - thus
* we are rounding upwards:
*/
end_pfn = e820_end_of_ram();
num_physpages = end_pfn; /* for pfn_valid */
check_efer();
discover_ebda();
init_memory_mapping(0, (end_pfn_map << PAGE_SHIFT));
if (efi_enabled)
efi_map_memmap();
dmi_scan_machine();
/*
* VMware detection requires dmi to be available, so this
* needs to be done after dmi_scan_machine, for the BP.
*/
init_hypervisor(&boot_cpu_data);
/*
* init_hypervisor gets called more than one time throughout
* the life of the cpu, but that hurts kvm. We only need it
* once, so we do it explicitly here
*/
if (boot_cpu_data.x86_hyper_vendor == X86_HYPER_VENDOR_KVM)
kvmclock_init();
#ifdef CONFIG_ACPI
/*
* Initialize the ACPI boot-time table parser (gets the RSDP and SDT).
* Call this early for SRAT node setup.
*/
acpi_boot_table_init();
#endif
#ifdef CONFIG_ACPI_NUMA
/*
* Parse SRAT to discover nodes.
*/
acpi_numa_init();
#endif
#ifdef CONFIG_NUMA
numa_initmem_init(0, end_pfn);
#else
contig_initmem_init(0, end_pfn);
#endif
/* Reserve direct mapping */
reserve_bootmem_generic(table_start << PAGE_SHIFT,
(table_end - table_start) << PAGE_SHIFT,
BOOTMEM_DEFAULT);
/* reserve kernel */
reserve_bootmem_generic(__pa_symbol(&_text),
__pa_symbol(&_end) - __pa_symbol(&_text),
BOOTMEM_DEFAULT);
/*
* reserve physical page 0 - it's a special BIOS page on many boxes,
* enabling clean reboots, SMP operation, laptop functions.
*/
reserve_bootmem_generic(0, PAGE_SIZE, BOOTMEM_DEFAULT);
/* reserve ebda region */
if (ebda_addr)
reserve_bootmem_generic(ebda_addr, ebda_size,
BOOTMEM_DEFAULT);
#ifdef CONFIG_SMP
/* Reserve SMP trampoline */
reserve_bootmem_generic(SMP_TRAMPOLINE_BASE, 2*PAGE_SIZE,
BOOTMEM_DEFAULT);
#endif
#ifdef CONFIG_ACPI_SLEEP
/*
* Reserve low memory region for sleep support.
*/
acpi_reserve_bootmem();
#endif
#ifdef CONFIG_X86_LOCAL_APIC
/*
* Find and reserve possible boot-time SMP configuration:
*/
find_smp_config();
#endif
#ifdef CONFIG_BLK_DEV_INITRD
if (LOADER_TYPE && INITRD_START) {
if (INITRD_START + INITRD_SIZE <= (end_pfn << PAGE_SHIFT)) {
reserve_bootmem_generic(INITRD_START, INITRD_SIZE,
BOOTMEM_DEFAULT);
initrd_start =
INITRD_START ? INITRD_START + PAGE_OFFSET : 0;
initrd_end = initrd_start+INITRD_SIZE;
}
else {
printk(KERN_ERR "initrd extends beyond end of memory "
"(0x%08lx > 0x%08lx)\ndisabling initrd\n",
(unsigned long)(INITRD_START + INITRD_SIZE),
(unsigned long)(end_pfn << PAGE_SHIFT));
initrd_start = 0;
}
}
#endif
#ifdef CONFIG_KEXEC
if ((crashk_res.start < crashk_res.end) &&
(crashk_res.end <= (end_pfn << PAGE_SHIFT))) {
if (reserve_bootmem_generic(crashk_res.start,
crashk_res.end - crashk_res.start + 1,
BOOTMEM_EXCLUSIVE) < 0) {
printk(KERN_ERR "crashkernel reservation failed - "
"memory is in use\n");
crashk_res.start = crashk_res.end = 0;
}
}
else {
printk(KERN_ERR "Memory for crash kernel (0x%lx to 0x%lx) not"
"within permissible range\ndisabling kdump\n",
crashk_res.start, crashk_res.end);
crashk_res.end = 0;
crashk_res.start = 0;
}
#endif
reserve_ibft_region();
paging_init();
check_ioapic();
/*
* set this early, so we dont allocate cpu0
* if MADT list doesnt list BSP first
* mpparse.c/MP_processor_info() allocates logical cpu numbers.
*/
cpu_set(0, cpu_present_map);
#ifdef CONFIG_ACPI
/*
* Read APIC and some other early information from ACPI tables.
*/
acpi_boot_init();
#endif
init_cpu_to_node();
#ifdef CONFIG_X86_LOCAL_APIC
/*
* get boot-time SMP configuration:
*/
if (smp_found_config)
get_smp_config();
init_apic_mappings();
#endif
/*
* Request address space for all standard RAM and ROM resources
* and also for regions reported as reserved by the e820.
*/
probe_roms();
e820_reserve_resources();
e820_mark_nosave_regions();
request_resource(&iomem_resource, &video_ram_resource);
{
unsigned i;
/* request I/O space for devices used on all i[345]86 PCs */
for (i = 0; i < STANDARD_IO_RESOURCES; i++)
request_resource(&ioport_resource, &standard_io_resources[i]);
}
e820_setup_gap();
#ifdef CONFIG_VT
#if defined(CONFIG_VGA_CONSOLE)
if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY))
conswitchp = &vga_con;
#elif defined(CONFIG_DUMMY_CONSOLE)
conswitchp = &dummy_con;
#endif
#endif
}
void __init setup_arch(char **cmdline_p)
{
unsigned long kernel_end;
ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
screen_info = SCREEN_INFO;
edid_info = EDID_INFO;
saved_video_mode = SAVED_VIDEO_MODE;
bootloader_type = LOADER_TYPE;
#ifdef CONFIG_BLK_DEV_RAM
rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
#endif
setup_memory_region();
copy_edd();
if (!MOUNT_ROOT_RDONLY)
root_mountflags &= ~MS_RDONLY;
init_mm.start_code = (unsigned long) &_text;
init_mm.end_code = (unsigned long) &_etext;
init_mm.end_data = (unsigned long) &_edata;
init_mm.brk = (unsigned long) &_end;
code_resource.start = virt_to_phys(&_text);
code_resource.end = virt_to_phys(&_etext)-1;
data_resource.start = virt_to_phys(&_etext);
data_resource.end = virt_to_phys(&_edata)-1;
parse_cmdline_early(cmdline_p);
early_identify_cpu(&boot_cpu_data);
/*
* partially used pages are not usable - thus
* we are rounding upwards:
*/
end_pfn = e820_end_of_ram();
num_physpages = end_pfn; /* for pfn_valid */
check_efer();
discover_ebda();
init_memory_mapping(0, (end_pfn_map << PAGE_SHIFT));
dmi_scan_machine();
zap_low_mappings(0);
#ifdef CONFIG_ACPI
/*
* Initialize the ACPI boot-time table parser (gets the RSDP and SDT).
* Call this early for SRAT node setup.
*/
acpi_boot_table_init();
#endif
#ifdef CONFIG_ACPI_NUMA
/*
* Parse SRAT to discover nodes.
*/
acpi_numa_init();
#endif
#ifdef CONFIG_NUMA
numa_initmem_init(0, end_pfn);
#else
contig_initmem_init(0, end_pfn);
#endif
/* Reserve direct mapping */
reserve_bootmem_generic(table_start << PAGE_SHIFT,
(table_end - table_start) << PAGE_SHIFT);
/* reserve kernel */
kernel_end = round_up(__pa_symbol(&_end),PAGE_SIZE);
reserve_bootmem_generic(HIGH_MEMORY, kernel_end - HIGH_MEMORY);
/*
* reserve physical page 0 - it's a special BIOS page on many boxes,
* enabling clean reboots, SMP operation, laptop functions.
*/
reserve_bootmem_generic(0, PAGE_SIZE);
/* reserve ebda region */
if (ebda_addr)
reserve_bootmem_generic(ebda_addr, ebda_size);
#ifdef CONFIG_SMP
/*
* But first pinch a few for the stack/trampoline stuff
* FIXME: Don't need the extra page at 4K, but need to fix
* trampoline before removing it. (see the GDT stuff)
*/
reserve_bootmem_generic(PAGE_SIZE, PAGE_SIZE);
/* Reserve SMP trampoline */
reserve_bootmem_generic(SMP_TRAMPOLINE_BASE, PAGE_SIZE);
#endif
#ifdef CONFIG_ACPI_SLEEP
/*
* Reserve low memory region for sleep support.
*/
acpi_reserve_bootmem();
#endif
#ifdef CONFIG_X86_LOCAL_APIC
/*
* Find and reserve possible boot-time SMP configuration:
*/
find_smp_config();
#endif
#ifdef CONFIG_BLK_DEV_INITRD
if (LOADER_TYPE && INITRD_START) {
if (INITRD_START + INITRD_SIZE <= (end_pfn << PAGE_SHIFT)) {
reserve_bootmem_generic(INITRD_START, INITRD_SIZE);
initrd_start =
INITRD_START ? INITRD_START + PAGE_OFFSET : 0;
initrd_end = initrd_start+INITRD_SIZE;
}
else {
printk(KERN_ERR "initrd extends beyond end of memory "
"(0x%08lx > 0x%08lx)\ndisabling initrd\n",
(unsigned long)(INITRD_START + INITRD_SIZE),
(unsigned long)(end_pfn << PAGE_SHIFT));
initrd_start = 0;
}
}
#endif
#ifdef CONFIG_KEXEC
if (crashk_res.start != crashk_res.end) {
reserve_bootmem(crashk_res.start,
crashk_res.end - crashk_res.start + 1);
}
#endif
paging_init();
check_ioapic();
/*
* set this early, so we dont allocate cpu0
* if MADT list doesnt list BSP first
* mpparse.c/MP_processor_info() allocates logical cpu numbers.
*/
cpu_set(0, cpu_present_map);
#ifdef CONFIG_ACPI
/*
* Read APIC and some other early information from ACPI tables.
*/
acpi_boot_init();
#endif
init_cpu_to_node();
#ifdef CONFIG_X86_LOCAL_APIC
/*
* get boot-time SMP configuration:
*/
if (smp_found_config)
get_smp_config();
init_apic_mappings();
#endif
/*
* Request address space for all standard RAM and ROM resources
* and also for regions reported as reserved by the e820.
*/
probe_roms();
e820_reserve_resources();
request_resource(&iomem_resource, &video_ram_resource);
{
unsigned i;
/* request I/O space for devices used on all i[345]86 PCs */
for (i = 0; i < STANDARD_IO_RESOURCES; i++)
request_resource(&ioport_resource, &standard_io_resources[i]);
}
e820_setup_gap();
#ifdef CONFIG_GART_IOMMU
iommu_hole_init();
#endif
#ifdef CONFIG_VT
#if defined(CONFIG_VGA_CONSOLE)
conswitchp = &vga_con;
#elif defined(CONFIG_DUMMY_CONSOLE)
conswitchp = &dummy_con;
#endif
#endif
}
