X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/e5568f75972dfc723778653c11cb6b4dc825716a..4d15aeb193b2c68f1d38666c317f8d3734f5f083:/osfmk/i386/i386_init.c diff --git a/osfmk/i386/i386_init.c b/osfmk/i386/i386_init.c index c0343c525..2d8abbdb6 100644 --- a/osfmk/i386/i386_init.c +++ b/osfmk/i386/i386_init.c @@ -1,23 +1,29 @@ /* - * Copyright (c) 2003 Apple Computer, Inc. All rights reserved. + * Copyright (c) 2003-2016 Apple Inc. All rights reserved. * - * @APPLE_LICENSE_HEADER_START@ + * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * - * The contents of this file constitute Original Code as defined in and - * are subject to the Apple Public Source License Version 1.1 (the - * "License"). You may not use this file except in compliance with the - * License. Please obtain a copy of the License at - * http://www.apple.com/publicsource and read it before using this file. + * This file contains Original Code and/or Modifications of Original Code + * as defined in and that are subject to the Apple Public Source License + * Version 2.0 (the 'License'). You may not use this file except in + * compliance with the License. The rights granted to you under the License + * may not be used to create, or enable the creation or redistribution of, + * unlawful or unlicensed copies of an Apple operating system, or to + * circumvent, violate, or enable the circumvention or violation of, any + * terms of an Apple operating system software license agreement. * - * This Original Code and all software distributed under the License are - * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER + * Please obtain a copy of the License at + * http://www.opensource.apple.com/apsl/ and read it before using this file. + * + * The Original Code and all software distributed under the License are + * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the - * License for the specific language governing rights and limitations - * under the License. + * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. + * Please see the License for the specific language governing rights and + * limitations under the License. * - * @APPLE_LICENSE_HEADER_END@ + * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* * @OSF_COPYRIGHT@ @@ -48,11 +54,6 @@ * the rights to redistribute these changes. */ -#include -#include -#include -#include -#include #include @@ -61,139 +62,548 @@ #include #include #include -#include #include #include #include #include #include #include -#include +#include #include #include #include +#include +#include #include #include #include +#include #include #include -#include -#include #include +#include #include -#include +#include #include -#if MACH_KDB -#include -#endif /* MACH_KDB */ -#include -#ifdef __MACHO__ -#include -#include - -static KernelBootArgs_t *kernelBootArgs; +#include +#if CONFIG_MTRR +#include +#endif +#include +#if CONFIG_MCA +#include +#endif +#include +#include +#include +#include +#include +#include /* LcksOpts */ +#if DEBUG +#include #endif +#if DEBUG +#define DBG(x...) kprintf(x) +#else +#define DBG(x...) +#endif + +int debug_task; + +static boot_args *kernelBootArgs; + +extern int disableConsoleOutput; +extern const char version[]; +extern const char version_variant[]; +extern int nx_enabled; + +/* + * Set initial values so that ml_phys_* routines can use the booter's ID mapping + * to touch physical space before the kernel's physical aperture exists. + */ +uint64_t physmap_base = 0; +uint64_t physmap_max = 4*GB; -vm_offset_t boot_args_start = 0; /* pointer to kernel arguments, set in start.s */ +pd_entry_t *KPTphys; +pd_entry_t *IdlePTD; +pdpt_entry_t *IdlePDPT; +pml4_entry_t *IdlePML4; -#ifdef __MACHO__ -#include -vm_offset_t edata, etext, end; +char *physfree; /* - * Called first for a mach-o kernel before paging is set up. - * Returns the first available physical address in memory. + * Note: ALLOCPAGES() can only be used safely within Idle_PTs_init() + * due to the mutation of physfree. */ +static void * +ALLOCPAGES(int npages) +{ + uintptr_t tmp = (uintptr_t)physfree; + bzero(physfree, npages * PAGE_SIZE); + physfree += npages * PAGE_SIZE; + tmp += VM_MIN_KERNEL_ADDRESS & ~LOW_4GB_MASK; + return (void *)tmp; +} + +static void +fillkpt(pt_entry_t *base, int prot, uintptr_t src, int index, int count) +{ + int i; + for (i=0; iflags & S_ZEROFILL) - bzero((char *) sp->addr, sp->size); - } while (sp = (struct section *)nextsect(sgp, sp)); + IdlePML4[0] = IdlePML4[KERNEL_PML4_INDEX]; + uint64_t oldcr3 = get_cr3_raw(); + set_cr3_raw((uint32_t) (uintptr_t)ID_MAP_VTOP(IdlePML4)); + return oldcr3; +} + +void +x86_64_post_sleep(uint64_t new_cr3) +{ + IdlePML4[0] = 0; + set_cr3_raw((uint32_t) new_cr3); +} + + + + +// Set up the physical mapping - NPHYSMAP GB of memory mapped at a high address +// NPHYSMAP is determined by the maximum supported RAM size plus 4GB to account +// the PCI hole (which is less 4GB but not more). + +/* Compile-time guard: NPHYSMAP is capped to 256GiB, accounting for + * randomisation + */ +extern int maxphymapsupported[NPHYSMAP <= (PTE_PER_PAGE/2) ? 1 : -1]; + +static void +physmap_init(void) +{ + pt_entry_t *physmapL3 = ALLOCPAGES(1); + struct { + pt_entry_t entries[PTE_PER_PAGE]; + } * physmapL2 = ALLOCPAGES(NPHYSMAP); + + uint64_t i; + uint8_t phys_random_L3 = early_random() & 0xFF; + + /* We assume NX support. Mark all levels of the PHYSMAP NX + * to avoid granting executability via a single bit flip. + */ +#if DEVELOPMENT || DEBUG + uint32_t reg[4]; + do_cpuid(0x80000000, reg); + if (reg[eax] >= 0x80000001) { + do_cpuid(0x80000001, reg); + assert(reg[edx] & CPUID_EXTFEATURE_XD); + } +#endif /* DEVELOPMENT || DEBUG */ + + for(i = 0; i < NPHYSMAP; i++) { + physmapL3[i + phys_random_L3] = + ((uintptr_t)ID_MAP_VTOP(&physmapL2[i])) + | INTEL_PTE_VALID + | INTEL_PTE_NX + | INTEL_PTE_WRITE; + + uint64_t j; + for(j = 0; j < PTE_PER_PAGE; j++) { + physmapL2[i].entries[j] = + ((i * PTE_PER_PAGE + j) << PDSHIFT) + | INTEL_PTE_PS + | INTEL_PTE_VALID + | INTEL_PTE_NX + | INTEL_PTE_WRITE; } } - kernelBootArgs = (KernelBootArgs_t *) boot_args_start; - end = round_page( kernelBootArgs->kaddr + kernelBootArgs->ksize ); + IdlePML4[KERNEL_PHYSMAP_PML4_INDEX] = + ((uintptr_t)ID_MAP_VTOP(physmapL3)) + | INTEL_PTE_VALID + | INTEL_PTE_NX + | INTEL_PTE_WRITE; + + physmap_base = KVADDR(KERNEL_PHYSMAP_PML4_INDEX, phys_random_L3, 0, 0); + physmap_max = physmap_base + NPHYSMAP * GB; + DBG("Physical address map base: 0x%qx\n", physmap_base); + DBG("Physical map idlepml4[%d]: 0x%llx\n", + KERNEL_PHYSMAP_PML4_INDEX, IdlePML4[KERNEL_PHYSMAP_PML4_INDEX]); +} + +static void +descriptor_alias_init() +{ + vm_offset_t master_gdt_phys; + vm_offset_t master_gdt_alias_phys; + vm_offset_t master_idt_phys; + vm_offset_t master_idt_alias_phys; + + assert(((vm_offset_t)master_gdt & PAGE_MASK) == 0); + assert(((vm_offset_t)master_idt64 & PAGE_MASK) == 0); + + master_gdt_phys = (vm_offset_t) ID_MAP_VTOP(master_gdt); + master_idt_phys = (vm_offset_t) ID_MAP_VTOP(master_idt64); + master_gdt_alias_phys = (vm_offset_t) ID_MAP_VTOP(MASTER_GDT_ALIAS); + master_idt_alias_phys = (vm_offset_t) ID_MAP_VTOP(MASTER_IDT_ALIAS); + + DBG("master_gdt_phys: %p\n", (void *) master_gdt_phys); + DBG("master_idt_phys: %p\n", (void *) master_idt_phys); + DBG("master_gdt_alias_phys: %p\n", (void *) master_gdt_alias_phys); + DBG("master_idt_alias_phys: %p\n", (void *) master_idt_alias_phys); - return end; + KPTphys[atop_kernel(master_gdt_alias_phys)] = master_gdt_phys | + INTEL_PTE_VALID | INTEL_PTE_NX | INTEL_PTE_WRITE; + KPTphys[atop_kernel(master_idt_alias_phys)] = master_idt_phys | + INTEL_PTE_VALID | INTEL_PTE_NX; /* read-only */ } + +static void +Idle_PTs_init(void) +{ + /* Allocate the "idle" kernel page tables: */ + KPTphys = ALLOCPAGES(NKPT); /* level 1 */ + IdlePTD = ALLOCPAGES(NPGPTD); /* level 2 */ + IdlePDPT = ALLOCPAGES(1); /* level 3 */ + IdlePML4 = ALLOCPAGES(1); /* level 4 */ + + // Fill the lowest level with everything up to physfree + fillkpt(KPTphys, + INTEL_PTE_WRITE, 0, 0, (int)(((uintptr_t)physfree) >> PAGE_SHIFT)); + + /* IdlePTD */ + fillkpt(IdlePTD, + INTEL_PTE_WRITE, (uintptr_t)ID_MAP_VTOP(KPTphys), 0, NKPT); + + // IdlePDPT entries + fillkpt(IdlePDPT, + INTEL_PTE_WRITE, (uintptr_t)ID_MAP_VTOP(IdlePTD), 0, NPGPTD); + + // IdlePML4 single entry for kernel space. + fillkpt(IdlePML4 + KERNEL_PML4_INDEX, + INTEL_PTE_WRITE, (uintptr_t)ID_MAP_VTOP(IdlePDPT), 0, 1); + + postcode(VSTART_PHYSMAP_INIT); + + physmap_init(); + + postcode(VSTART_DESC_ALIAS_INIT); + + descriptor_alias_init(); + + postcode(VSTART_SET_CR3); + + // Switch to the page tables.. + set_cr3_raw((uintptr_t)ID_MAP_VTOP(IdlePML4)); + +} + + +/* + * vstart() is called in the natural mode (64bit for K64, 32 for K32) + * on a set of bootstrap pagetables which use large, 2MB pages to map + * all of physical memory in both. See idle_pt.c for details. + * + * In K64 this identity mapping is mirrored the top and bottom 512GB + * slots of PML4. + * + * The bootstrap processor called with argument boot_args_start pointing to + * the boot-args block. The kernel's (4K page) page tables are allocated and + * initialized before switching to these. + * + * Non-bootstrap processors are called with argument boot_args_start NULL. + * These processors switch immediately to the existing kernel page tables. + */ +__attribute__((noreturn)) +void +vstart(vm_offset_t boot_args_start) +{ + boolean_t is_boot_cpu = !(boot_args_start == 0); + int cpu; + uint32_t lphysfree; + + postcode(VSTART_ENTRY); + + if (is_boot_cpu) { + /* + * Get startup parameters. + */ + kernelBootArgs = (boot_args *)boot_args_start; + lphysfree = kernelBootArgs->kaddr + kernelBootArgs->ksize; + physfree = (void *)(uintptr_t)((lphysfree + PAGE_SIZE - 1) &~ (PAGE_SIZE - 1)); + +#if DEVELOPMENT || DEBUG + pal_serial_init(); #endif + DBG("revision 0x%x\n", kernelBootArgs->Revision); + DBG("version 0x%x\n", kernelBootArgs->Version); + DBG("command line %s\n", kernelBootArgs->CommandLine); + DBG("memory map 0x%x\n", kernelBootArgs->MemoryMap); + DBG("memory map sz 0x%x\n", kernelBootArgs->MemoryMapSize); + DBG("kaddr 0x%x\n", kernelBootArgs->kaddr); + DBG("ksize 0x%x\n", kernelBootArgs->ksize); + DBG("physfree %p\n", physfree); + DBG("bootargs: %p, &ksize: %p &kaddr: %p\n", + kernelBootArgs, + &kernelBootArgs->ksize, + &kernelBootArgs->kaddr); + DBG("SMBIOS mem sz 0x%llx\n", kernelBootArgs->PhysicalMemorySize); -extern const char version[]; -extern const char version_variant[]; + /* + * Setup boot args given the physical start address. + * Note: PE_init_platform needs to be called before Idle_PTs_init + * because access to the DeviceTree is required to read the + * random seed before generating a random physical map slide. + */ + kernelBootArgs = (boot_args *) + ml_static_ptovirt(boot_args_start); + DBG("i386_init(0x%lx) kernelBootArgs=%p\n", + (unsigned long)boot_args_start, kernelBootArgs); + PE_init_platform(FALSE, kernelBootArgs); + postcode(PE_INIT_PLATFORM_D); + + Idle_PTs_init(); + postcode(VSTART_IDLE_PTS_INIT); + + first_avail = (vm_offset_t)ID_MAP_VTOP(physfree); + + cpu = 0; + cpu_data_alloc(TRUE); + } else { + /* Switch to kernel's page tables (from the Boot PTs) */ + set_cr3_raw((uintptr_t)ID_MAP_VTOP(IdlePML4)); + /* Find our logical cpu number */ + cpu = lapic_to_cpu[(LAPIC_READ(ID)>>LAPIC_ID_SHIFT) & LAPIC_ID_MASK]; + DBG("CPU: %d, GSBASE initial value: 0x%llx\n", cpu, rdmsr64(MSR_IA32_GS_BASE)); + } + + postcode(VSTART_CPU_DESC_INIT); + if(is_boot_cpu) + cpu_desc_init64(cpu_datap(cpu)); + cpu_desc_load64(cpu_datap(cpu)); + postcode(VSTART_CPU_MODE_INIT); + if (is_boot_cpu) + cpu_mode_init(current_cpu_datap()); /* cpu_mode_init() will be + * invoked on the APs + * via i386_init_slave() + */ + postcode(VSTART_EXIT); + x86_init_wrapper(is_boot_cpu ? (uintptr_t) i386_init + : (uintptr_t) i386_init_slave, + cpu_datap(cpu)->cpu_int_stack_top); +} + +void +pstate_trace(void) +{ +} /* * Cpu initialization. Running virtual, but without MACH VM - * set up. First C routine called, unless i386_preinit() was called first. + * set up. */ void i386_init(void) { unsigned int maxmem; + uint64_t maxmemtouse; + unsigned int cpus = 0; + boolean_t fidn; + boolean_t IA32e = TRUE; - cpu_init(); + postcode(I386_INIT_ENTRY); - /* - * Setup some processor related structures to satisfy funnels. - * Must be done before using unparallelized device drivers. - */ - processor_ptr[0] = &processor_array[0]; - master_cpu = 0; - master_processor = cpu_to_processor(master_cpu); + pal_i386_init(); + tsc_init(); + rtclock_early_init(); /* mach_absolute_time() now functionsl */ - PE_init_platform(FALSE, kernelBootArgs); + kernel_debug_string_early("i386_init"); + pstate_trace(); - /* - * Set up initial thread so current_thread() works early on - */ - thread_bootstrap(); +#if CONFIG_MCA + /* Initialize machine-check handling */ + mca_cpu_init(); +#endif + + master_cpu = 0; + cpu_init(); + + postcode(CPU_INIT_D); printf_init(); /* Init this in case we need debugger */ panic_init(); /* Init this in case we need debugger */ /* setup debugging output if one has been chosen */ + kernel_debug_string_early("PE_init_kprintf"); PE_init_kprintf(FALSE); - kprintf("kprintf initialized\n"); + + kernel_debug_string_early("kernel_early_bootstrap"); + kernel_early_bootstrap(); + + if (!PE_parse_boot_argn("diag", &dgWork.dgFlags, sizeof (dgWork.dgFlags))) + dgWork.dgFlags = 0; + + serialmode = 0; + if(PE_parse_boot_argn("serial", &serialmode, sizeof (serialmode))) { + /* We want a serial keyboard and/or console */ + kprintf("Serial mode specified: %08X\n", serialmode); + } + if(serialmode & 1) { + (void)switch_to_serial_console(); + disableConsoleOutput = FALSE; /* Allow printfs to happen */ + } /* setup console output */ + kernel_debug_string_early("PE_init_printf"); PE_init_printf(FALSE); kprintf("version_variant = %s\n", version_variant); kprintf("version = %s\n", version); + + if (!PE_parse_boot_argn("maxmem", &maxmem, sizeof (maxmem))) + maxmemtouse = 0; + else + maxmemtouse = ((uint64_t)maxmem) * MB; + if (PE_parse_boot_argn("cpus", &cpus, sizeof (cpus))) { + if ((0 < cpus) && (cpus < max_ncpus)) + max_ncpus = cpus; + } - /* - * VM initialization, after this we're using page tables... - * The maximum number of cpus must be set beforehand. + /* + * debug support for > 4G systems */ - if (!PE_parse_boot_arg("maxmem", &maxmem)) - maxmem=0; + PE_parse_boot_argn("himemory_mode", &vm_himemory_mode, sizeof (vm_himemory_mode)); + if (vm_himemory_mode != 0) + kprintf("himemory_mode: %d\n", vm_himemory_mode); + + if (!PE_parse_boot_argn("immediate_NMI", &fidn, sizeof (fidn))) + force_immediate_debugger_NMI = FALSE; else - maxmem = maxmem * (1024 * 1024); + force_immediate_debugger_NMI = fidn; - if (PE_parse_boot_arg("cpus", &wncpu)) { - if (!((wncpu > 0) && (wncpu < NCPUS))) - wncpu = NCPUS; - } else - wncpu = NCPUS; +#if DEBUG + nanoseconds_to_absolutetime(URGENCY_NOTIFICATION_ASSERT_NS, &urgency_notification_assert_abstime_threshold); +#endif + PE_parse_boot_argn("urgency_notification_abstime", + &urgency_notification_assert_abstime_threshold, + sizeof(urgency_notification_assert_abstime_threshold)); - i386_vm_init(maxmem, kernelBootArgs); + if (!(cpuid_extfeatures() & CPUID_EXTFEATURE_XD)) + nx_enabled = 0; - PE_init_platform(TRUE, kernelBootArgs); + /* + * VM initialization, after this we're using page tables... + * Thn maximum number of cpus must be set beforehand. + */ + kernel_debug_string_early("i386_vm_init"); + i386_vm_init(maxmemtouse, IA32e, kernelBootArgs); /* create the console for verbose or pretty mode */ + /* Note: doing this prior to tsc_init() allows for graceful panic! */ + PE_init_platform(TRUE, kernelBootArgs); PE_create_console(); - + + kernel_debug_string_early("power_management_init"); + power_management_init(); + processor_bootstrap(); + thread_bootstrap(); + + pstate_trace(); + kernel_debug_string_early("machine_startup"); machine_startup(); + pstate_trace(); +} + +static void +do_init_slave(boolean_t fast_restart) +{ + void *init_param = FULL_SLAVE_INIT; + + postcode(I386_INIT_SLAVE); + + if (!fast_restart) { + /* Ensure that caching and write-through are enabled */ + set_cr0(get_cr0() & ~(CR0_NW|CR0_CD)); + + DBG("i386_init_slave() CPU%d: phys (%d) active.\n", + get_cpu_number(), get_cpu_phys_number()); + + assert(!ml_get_interrupts_enabled()); + + cpu_mode_init(current_cpu_datap()); + pmap_cpu_init(); + +#if CONFIG_MCA + mca_cpu_init(); +#endif + + LAPIC_INIT(); + lapic_configure(); + LAPIC_DUMP(); + LAPIC_CPU_MAP_DUMP(); + + init_fpu(); + +#if CONFIG_MTRR + mtrr_update_cpu(); +#endif + /* update CPU microcode */ + ucode_update_wake(); + } else + init_param = FAST_SLAVE_INIT; + +#if CONFIG_VMX + /* resume VT operation */ + vmx_resume(FALSE); +#endif +#if CONFIG_MTRR + if (!fast_restart) + pat_init(); +#endif + + cpu_thread_init(); /* not strictly necessary */ + + cpu_init(); /* Sets cpu_running which starter cpu waits for */ + slave_main(init_param); + + panic("do_init_slave() returned from slave_main()"); +} + +/* + * i386_init_slave() is called from pstart. + * We're in the cpu's interrupt stack with interrupts disabled. + * At this point we are in legacy mode. We need to switch on IA32e + * if the mode is set to 64-bits. + */ +void +i386_init_slave(void) +{ + do_init_slave(FALSE); } + +/* + * i386_init_slave_fast() is called from pmCPUHalt. + * We're running on the idle thread and need to fix up + * some accounting and get it so that the scheduler sees this + * CPU again. + */ +void +i386_init_slave_fast(void) +{ + do_init_slave(TRUE); +} + +