Skip to content
Navigation Menu
Toggle navigation
Sign in
In this repository
All GitHub Enterprise
↵
Jump to
↵
No suggested jump to results
In this repository
All GitHub Enterprise
↵
Jump to
↵
In this organization
All GitHub Enterprise
↵
Jump to
↵
In this repository
All GitHub Enterprise
↵
Jump to
↵
Sign in
Reseting focus
You signed in with another tab or window.
Reload
to refresh your session.
You signed out in another tab or window.
Reload
to refresh your session.
You switched accounts on another tab or window.
Reload
to refresh your session.
Dismiss alert
{{ message }}
mariux64
/
linux
Public
Notifications
You must be signed in to change notification settings
Fork
0
Star
0
Code
Issues
2
Pull requests
0
Actions
Projects
0
Wiki
Security
Insights
Additional navigation options
Code
Issues
Pull requests
Actions
Projects
Wiki
Security
Insights
Files
c33fd0b
Documentation
LICENSES
arch
alpha
arc
arm
arm64
csky
h8300
hexagon
ia64
m68k
microblaze
mips
nios2
openrisc
parisc
powerpc
boot
configs
crypto
include
kernel
ptrace
syscalls
trace
vdso
.gitignore
Makefile
align.c
asm-offsets.c
audit.c
btext.c
cacheinfo.c
cacheinfo.h
compat_audit.c
cpu_setup_44x.S
cpu_setup_6xx.S
cpu_setup_fsl_booke.S
cpu_setup_pa6t.S
cpu_setup_power.c
cpu_setup_ppc970.S
cputable.c
crash_dump.c
dawr.c
dbell.c
dma-iommu.c
dma-mask.c
dma-swiotlb.c
dt_cpu_ftrs.c
early_32.c
eeh.c
eeh_cache.c
eeh_driver.c
eeh_event.c
eeh_pe.c
eeh_sysfs.c
entry_32.S
entry_64.S
epapr_hcalls.S
epapr_paravirt.c
exceptions-64e.S
exceptions-64s.S
fadump.c
firmware.c
fpu.S
fsl_booke_entry_mapping.S
head_32.h
head_40x.S
head_44x.S
head_64.S
head_8xx.S
head_book3s_32.S
head_booke.h
head_fsl_booke.S
hw_breakpoint.c
hw_breakpoint_constraints.c
idle.c
idle_6xx.S
idle_book3e.S
idle_book3s.S
idle_e500.S
ima_arch.c
interrupt.c
interrupt_64.S
io-workarounds.c
io.c
iomap.c
iommu.c
irq.c
isa-bridge.c
jump_label.c
kdebugfs.c
kgdb.c
kprobes-ftrace.c
kprobes.c
kvm.c
kvm_emul.S
l2cr_6xx.S
legacy_serial.c
mce.c
mce_power.c
misc.S
misc_32.S
misc_64.S
module.c
module_32.c
module_64.c
msi.c
note.S
nvram_64.c
of_platform.c
optprobes.c
optprobes_head.S
paca.c
pci-common.c
pci-hotplug.c
pci_32.c
pci_64.c
pci_dn.c
pci_of_scan.c
pmc.c
ppc32.h
ppc_save_regs.S
proc_powerpc.c
process.c
prom.c
prom_init.c
prom_init_check.sh
prom_parse.c
reloc_32.S
reloc_64.S
rtas-proc.c
rtas-rtc.c
rtas.c
rtas_flash.c
rtas_pci.c
rtasd.c
secure_boot.c
security.c
secvar-ops.c
secvar-sysfs.c
setup-common.c
setup.h
setup_32.c
setup_64.c
signal.c
signal.h
signal_32.c
signal_64.c
smp-tbsync.c
smp.c
stacktrace.c
static_call.c
suspend.c
swsusp.c
swsusp_32.S
swsusp_64.c
swsusp_asm64.S
swsusp_booke.S
sys_ppc32.c
syscalls.c
sysfs.c
systbl.S
systbl_chk.sh
tau_6xx.c
time.c
tm.S
traps.c
ucall.S
udbg.c
udbg_16550.c
uprobes.c
vdso.c
vdso32_wrapper.S
vdso64_wrapper.S
vecemu.c
vector.S
vmlinux.lds.S
watchdog.c
kexec
kvm
lib
math-emu
mm
net
perf
platforms
purgatory
sysdev
tools
xmon
Kbuild
Kconfig
Kconfig.debug
Makefile
Makefile.postlink
riscv
s390
sh
sparc
um
x86
xtensa
.gitignore
Kconfig
block
certs
crypto
drivers
fs
include
init
ipc
kernel
lib
mm
net
samples
scripts
security
sound
tools
usr
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS
Makefile
README
Breadcrumbs
linux
/
arch
/
powerpc
/
kernel
/
setup-common.c
Blame
Blame
Latest commit
History
History
940 lines (785 loc) · 22.6 KB
Breadcrumbs
linux
/
arch
/
powerpc
/
kernel
/
setup-common.c
Top
File metadata and controls
Code
Blame
940 lines (785 loc) · 22.6 KB
Raw
// SPDX-License-Identifier: GPL-2.0-or-later /* * Common boot and setup code for both 32-bit and 64-bit. * Extracted from arch/powerpc/kernel/setup_64.c. * * Copyright (C) 2001 PPC64 Team, IBM Corp */ #undef DEBUG #include <linux/export.h> #include <linux/panic_notifier.h> #include <linux/string.h> #include <linux/sched.h> #include <linux/init.h> #include <linux/kernel.h> #include <linux/reboot.h> #include <linux/delay.h> #include <linux/initrd.h> #include <linux/platform_device.h> #include <linux/seq_file.h> #include <linux/ioport.h> #include <linux/console.h> #include <linux/screen_info.h> #include <linux/root_dev.h> #include <linux/notifier.h> #include <linux/cpu.h> #include <linux/unistd.h> #include <linux/serial.h> #include <linux/serial_8250.h> #include <linux/percpu.h> #include <linux/memblock.h> #include <linux/of_platform.h> #include <linux/hugetlb.h> #include <linux/pgtable.h> #include <asm/io.h> #include <asm/paca.h> #include <asm/prom.h> #include <asm/processor.h> #include <asm/vdso_datapage.h> #include <asm/smp.h> #include <asm/elf.h> #include <asm/machdep.h> #include <asm/time.h> #include <asm/cputable.h> #include <asm/sections.h> #include <asm/firmware.h> #include <asm/btext.h> #include <asm/nvram.h> #include <asm/setup.h> #include <asm/rtas.h> #include <asm/iommu.h> #include <asm/serial.h> #include <asm/cache.h> #include <asm/page.h> #include <asm/mmu.h> #include <asm/xmon.h> #include <asm/cputhreads.h> #include <mm/mmu_decl.h> #include <asm/fadump.h> #include <asm/udbg.h> #include <asm/hugetlb.h> #include <asm/livepatch.h> #include <asm/mmu_context.h> #include <asm/cpu_has_feature.h> #include <asm/kasan.h> #include <asm/mce.h> #include "setup.h" #ifdef DEBUG #define DBG(fmt...) udbg_printf(fmt) #else #define DBG(fmt...) #endif /* The main machine-dep calls structure */ struct machdep_calls ppc_md; EXPORT_SYMBOL(ppc_md); struct machdep_calls *machine_id; EXPORT_SYMBOL(machine_id); int boot_cpuid = -1; EXPORT_SYMBOL_GPL(boot_cpuid); /* * These are used in binfmt_elf.c to put aux entries on the stack * for each elf executable being started. */ int dcache_bsize; int icache_bsize; /* * This still seems to be needed... -- paulus */ struct screen_info screen_info = { .orig_x = 0, .orig_y = 25, .orig_video_cols = 80, .orig_video_lines = 25, .orig_video_isVGA = 1, .orig_video_points = 16 }; #if defined(CONFIG_FB_VGA16_MODULE) EXPORT_SYMBOL(screen_info); #endif /* Variables required to store legacy IO irq routing */ int of_i8042_kbd_irq; EXPORT_SYMBOL_GPL(of_i8042_kbd_irq); int of_i8042_aux_irq; EXPORT_SYMBOL_GPL(of_i8042_aux_irq); #ifdef __DO_IRQ_CANON /* XXX should go elsewhere eventually */ int ppc_do_canonicalize_irqs; EXPORT_SYMBOL(ppc_do_canonicalize_irqs); #endif #ifdef CONFIG_CRASH_CORE /* This keeps a track of which one is the crashing cpu. */ int crashing_cpu = -1; #endif /* also used by kexec */ void machine_shutdown(void) { /* * if fadump is active, cleanup the fadump registration before we * shutdown. */ fadump_cleanup(); if (ppc_md.machine_shutdown) ppc_md.machine_shutdown(); } static void machine_hang(void) { pr_emerg("System Halted, OK to turn off power\n"); local_irq_disable(); while (1) ; } void machine_restart(char *cmd) { machine_shutdown(); if (ppc_md.restart) ppc_md.restart(cmd); smp_send_stop(); do_kernel_restart(cmd); mdelay(1000); machine_hang(); } void machine_power_off(void) { machine_shutdown(); do_kernel_power_off(); smp_send_stop(); machine_hang(); } /* Used by the G5 thermal driver */ EXPORT_SYMBOL_GPL(machine_power_off); void (*pm_power_off)(void); EXPORT_SYMBOL_GPL(pm_power_off); void machine_halt(void) { machine_shutdown(); if (ppc_md.halt) ppc_md.halt(); smp_send_stop(); machine_hang(); } #ifdef CONFIG_SMP DEFINE_PER_CPU(unsigned int, cpu_pvr); #endif static void show_cpuinfo_summary(struct seq_file *m) { struct device_node *root; const char *model = NULL; unsigned long bogosum = 0; int i; if (IS_ENABLED(CONFIG_SMP) && IS_ENABLED(CONFIG_PPC32)) { for_each_online_cpu(i) bogosum += loops_per_jiffy; seq_printf(m, "total bogomips\t: %lu.%02lu\n", bogosum / (500000 / HZ), bogosum / (5000 / HZ) % 100); } seq_printf(m, "timebase\t: %lu\n", ppc_tb_freq); if (ppc_md.name) seq_printf(m, "platform\t: %s\n", ppc_md.name); root = of_find_node_by_path("/"); if (root) model = of_get_property(root, "model", NULL); if (model) seq_printf(m, "model\t\t: %s\n", model); of_node_put(root); if (ppc_md.show_cpuinfo != NULL) ppc_md.show_cpuinfo(m); /* Display the amount of memory */ if (IS_ENABLED(CONFIG_PPC32)) seq_printf(m, "Memory\t\t: %d MB\n", (unsigned int)(total_memory / (1024 * 1024))); } static int show_cpuinfo(struct seq_file *m, void *v) { unsigned long cpu_id = (unsigned long)v - 1; unsigned int pvr; unsigned long proc_freq; unsigned short maj; unsigned short min; #ifdef CONFIG_SMP pvr = per_cpu(cpu_pvr, cpu_id); #else pvr = mfspr(SPRN_PVR); #endif maj = (pvr >> 8) & 0xFF; min = pvr & 0xFF; seq_printf(m, "processor\t: %lu\ncpu\t\t: ", cpu_id); if (cur_cpu_spec->pvr_mask && cur_cpu_spec->cpu_name) seq_puts(m, cur_cpu_spec->cpu_name); else seq_printf(m, "unknown (%08x)", pvr); if (cpu_has_feature(CPU_FTR_ALTIVEC)) seq_puts(m, ", altivec supported"); seq_putc(m, '\n'); #ifdef CONFIG_TAU if (cpu_has_feature(CPU_FTR_TAU)) { if (IS_ENABLED(CONFIG_TAU_AVERAGE)) { /* more straightforward, but potentially misleading */ seq_printf(m, "temperature \t: %u C (uncalibrated)\n", cpu_temp(cpu_id)); } else { /* show the actual temp sensor range */ u32 temp; temp = cpu_temp_both(cpu_id); seq_printf(m, "temperature \t: %u-%u C (uncalibrated)\n", temp & 0xff, temp >> 16); } } #endif /* CONFIG_TAU */ /* * Platforms that have variable clock rates, should implement * the method ppc_md.get_proc_freq() that reports the clock * rate of a given cpu. The rest can use ppc_proc_freq to * report the clock rate that is same across all cpus. */ if (ppc_md.get_proc_freq) proc_freq = ppc_md.get_proc_freq(cpu_id); else proc_freq = ppc_proc_freq; if (proc_freq) seq_printf(m, "clock\t\t: %lu.%06luMHz\n", proc_freq / 1000000, proc_freq % 1000000); /* If we are a Freescale core do a simple check so * we dont have to keep adding cases in the future */ if (PVR_VER(pvr) & 0x8000) { switch (PVR_VER(pvr)) { case 0x8000: /* 7441/7450/7451, Voyager */ case 0x8001: /* 7445/7455, Apollo 6 */ case 0x8002: /* 7447/7457, Apollo 7 */ case 0x8003: /* 7447A, Apollo 7 PM */ case 0x8004: /* 7448, Apollo 8 */ case 0x800c: /* 7410, Nitro */ maj = ((pvr >> 8) & 0xF); min = PVR_MIN(pvr); break; default: /* e500/book-e */ maj = PVR_MAJ(pvr); min = PVR_MIN(pvr); break; } } else { switch (PVR_VER(pvr)) { case 0x1008: /* 740P/750P ?? */ maj = ((pvr >> 8) & 0xFF) - 1; min = pvr & 0xFF; break; case 0x004e: /* POWER9 bits 12-15 give chip type */ case 0x0080: /* POWER10 bit 12 gives SMT8/4 */ maj = (pvr >> 8) & 0x0F; min = pvr & 0xFF; break; default: maj = (pvr >> 8) & 0xFF; min = pvr & 0xFF; break; } } seq_printf(m, "revision\t: %hd.%hd (pvr %04x %04x)\n", maj, min, PVR_VER(pvr), PVR_REV(pvr)); if (IS_ENABLED(CONFIG_PPC32)) seq_printf(m, "bogomips\t: %lu.%02lu\n", loops_per_jiffy / (500000 / HZ), (loops_per_jiffy / (5000 / HZ)) % 100); seq_putc(m, '\n'); /* If this is the last cpu, print the summary */ if (cpumask_next(cpu_id, cpu_online_mask) >= nr_cpu_ids) show_cpuinfo_summary(m); return 0; } static void *c_start(struct seq_file *m, loff_t *pos) { if (*pos == 0) /* just in case, cpu 0 is not the first */ *pos = cpumask_first(cpu_online_mask); else *pos = cpumask_next(*pos - 1, cpu_online_mask); if ((*pos) < nr_cpu_ids) return (void *)(unsigned long)(*pos + 1); return NULL; } static void *c_next(struct seq_file *m, void *v, loff_t *pos) { (*pos)++; return c_start(m, pos); } static void c_stop(struct seq_file *m, void *v) { } const struct seq_operations cpuinfo_op = { .start = c_start, .next = c_next, .stop = c_stop, .show = show_cpuinfo, }; void __init check_for_initrd(void) { #ifdef CONFIG_BLK_DEV_INITRD DBG(" -> check_for_initrd() initrd_start=0x%lx initrd_end=0x%lx\n", initrd_start, initrd_end); /* If we were passed an initrd, set the ROOT_DEV properly if the values * look sensible. If not, clear initrd reference. */ if (is_kernel_addr(initrd_start) && is_kernel_addr(initrd_end) && initrd_end > initrd_start) ROOT_DEV = Root_RAM0; else initrd_start = initrd_end = 0; if (initrd_start) pr_info("Found initrd at 0x%lx:0x%lx\n", initrd_start, initrd_end); DBG(" <- check_for_initrd()\n"); #endif /* CONFIG_BLK_DEV_INITRD */ } #ifdef CONFIG_SMP int threads_per_core, threads_per_subcore, threads_shift __read_mostly; cpumask_t threads_core_mask __read_mostly; EXPORT_SYMBOL_GPL(threads_per_core); EXPORT_SYMBOL_GPL(threads_per_subcore); EXPORT_SYMBOL_GPL(threads_shift); EXPORT_SYMBOL_GPL(threads_core_mask); static void __init cpu_init_thread_core_maps(int tpc) { int i; threads_per_core = tpc; threads_per_subcore = tpc; cpumask_clear(&threads_core_mask); /* This implementation only supports power of 2 number of threads * for simplicity and performance */ threads_shift = ilog2(tpc); BUG_ON(tpc != (1 << threads_shift)); for (i = 0; i < tpc; i++) cpumask_set_cpu(i, &threads_core_mask); printk(KERN_INFO "CPU maps initialized for %d thread%s per core\n", tpc, tpc > 1 ? "s" : ""); printk(KERN_DEBUG " (thread shift is %d)\n", threads_shift); } u32 *cpu_to_phys_id = NULL; /** * setup_cpu_maps - initialize the following cpu maps: * cpu_possible_mask * cpu_present_mask * * Having the possible map set up early allows us to restrict allocations * of things like irqstacks to nr_cpu_ids rather than NR_CPUS. * * We do not initialize the online map here; cpus set their own bits in * cpu_online_mask as they come up. * * This function is valid only for Open Firmware systems. finish_device_tree * must be called before using this. * * While we're here, we may as well set the "physical" cpu ids in the paca. * * NOTE: This must match the parsing done in early_init_dt_scan_cpus. */ void __init smp_setup_cpu_maps(void) { struct device_node *dn; int cpu = 0; int nthreads = 1; DBG("smp_setup_cpu_maps()\n"); cpu_to_phys_id = memblock_alloc(nr_cpu_ids * sizeof(u32), __alignof__(u32)); if (!cpu_to_phys_id) panic("%s: Failed to allocate %zu bytes align=0x%zx\n", __func__, nr_cpu_ids * sizeof(u32), __alignof__(u32)); for_each_node_by_type(dn, "cpu") { const __be32 *intserv; __be32 cpu_be; int j, len; DBG(" * %pOF...\n", dn); intserv = of_get_property(dn, "ibm,ppc-interrupt-server#s", &len); if (intserv) { DBG(" ibm,ppc-interrupt-server#s -> %lu threads\n", (len / sizeof(int))); } else { DBG(" no ibm,ppc-interrupt-server#s -> 1 thread\n"); intserv = of_get_property(dn, "reg", &len); if (!intserv) { cpu_be = cpu_to_be32(cpu); /* XXX: what is this? uninitialized?? */ intserv = &cpu_be; /* assume logical == phys */ len = 4; } } nthreads = len / sizeof(int); for (j = 0; j < nthreads && cpu < nr_cpu_ids; j++) { bool avail; DBG(" thread %d -> cpu %d (hard id %d)\n", j, cpu, be32_to_cpu(intserv[j])); avail = of_device_is_available(dn); if (!avail) avail = !of_property_match_string(dn, "enable-method", "spin-table"); set_cpu_present(cpu, avail); set_cpu_possible(cpu, true); cpu_to_phys_id[cpu] = be32_to_cpu(intserv[j]); cpu++; } if (cpu >= nr_cpu_ids) { of_node_put(dn); break; } } /* If no SMT supported, nthreads is forced to 1 */ if (!cpu_has_feature(CPU_FTR_SMT)) { DBG(" SMT disabled ! nthreads forced to 1\n"); nthreads = 1; } #ifdef CONFIG_PPC64 /* * On pSeries LPAR, we need to know how many cpus * could possibly be added to this partition. */ if (firmware_has_feature(FW_FEATURE_LPAR) && (dn = of_find_node_by_path("/rtas"))) { int num_addr_cell, num_size_cell, maxcpus; const __be32 *ireg; num_addr_cell = of_n_addr_cells(dn); num_size_cell = of_n_size_cells(dn); ireg = of_get_property(dn, "ibm,lrdr-capacity", NULL); if (!ireg) goto out; maxcpus = be32_to_cpup(ireg + num_addr_cell + num_size_cell); /* Double maxcpus for processors which have SMT capability */ if (cpu_has_feature(CPU_FTR_SMT)) maxcpus *= nthreads; if (maxcpus > nr_cpu_ids) { printk(KERN_WARNING "Partition configured for %d cpus, " "operating system maximum is %u.\n", maxcpus, nr_cpu_ids); maxcpus = nr_cpu_ids; } else printk(KERN_INFO "Partition configured for %d cpus.\n", maxcpus); for (cpu = 0; cpu < maxcpus; cpu++) set_cpu_possible(cpu, true); out: of_node_put(dn); } vdso_data->processorCount = num_present_cpus(); #endif /* CONFIG_PPC64 */ /* Initialize CPU <=> thread mapping/ * * WARNING: We assume that the number of threads is the same for * every CPU in the system. If that is not the case, then some code * here will have to be reworked */ cpu_init_thread_core_maps(nthreads); /* Now that possible cpus are set, set nr_cpu_ids for later use */ setup_nr_cpu_ids(); free_unused_pacas(); } #endif /* CONFIG_SMP */ #ifdef CONFIG_PCSPKR_PLATFORM static __init int add_pcspkr(void) { struct device_node *np; struct platform_device *pd; int ret; np = of_find_compatible_node(NULL, NULL, "pnpPNP,100"); of_node_put(np); if (!np) return -ENODEV; pd = platform_device_alloc("pcspkr", -1); if (!pd) return -ENOMEM; ret = platform_device_add(pd); if (ret) platform_device_put(pd); return ret; } device_initcall(add_pcspkr); #endif /* CONFIG_PCSPKR_PLATFORM */ static __init void probe_machine(void) { extern struct machdep_calls __machine_desc_start; extern struct machdep_calls __machine_desc_end; unsigned int i; /* * Iterate all ppc_md structures until we find the proper * one for the current machine type */ DBG("Probing machine type ...\n"); /* * Check ppc_md is empty, if not we have a bug, ie, we setup an * entry before probe_machine() which will be overwritten */ for (i = 0; i < (sizeof(ppc_md) / sizeof(void *)); i++) { if (((void **)&ppc_md)[i]) { printk(KERN_ERR "Entry %d in ppc_md non empty before" " machine probe !\n", i); } } for (machine_id = &__machine_desc_start; machine_id < &__machine_desc_end; machine_id++) { DBG(" %s ...", machine_id->name); memcpy(&ppc_md, machine_id, sizeof(struct machdep_calls)); if (ppc_md.probe()) { DBG(" match !\n"); break; } DBG("\n"); } /* What can we do if we didn't find ? */ if (machine_id >= &__machine_desc_end) { pr_err("No suitable machine description found !\n"); for (;;); } printk(KERN_INFO "Using %s machine description\n", ppc_md.name); } /* Match a class of boards, not a specific device configuration. */ int check_legacy_ioport(unsigned long base_port) { struct device_node *parent, *np = NULL; int ret = -ENODEV; switch(base_port) { case I8042_DATA_REG: if (!(np = of_find_compatible_node(NULL, NULL, "pnpPNP,303"))) np = of_find_compatible_node(NULL, NULL, "pnpPNP,f03"); if (np) { parent = of_get_parent(np); of_i8042_kbd_irq = irq_of_parse_and_map(parent, 0); if (!of_i8042_kbd_irq) of_i8042_kbd_irq = 1; of_i8042_aux_irq = irq_of_parse_and_map(parent, 1); if (!of_i8042_aux_irq) of_i8042_aux_irq = 12; of_node_put(np); np = parent; break; } np = of_find_node_by_type(NULL, "8042"); /* Pegasos has no device_type on its 8042 node, look for the * name instead */ if (!np) np = of_find_node_by_name(NULL, "8042"); if (np) { of_i8042_kbd_irq = 1; of_i8042_aux_irq = 12; } break; case FDC_BASE: /* FDC1 */ np = of_find_node_by_type(NULL, "fdc"); break; default: /* ipmi is supposed to fail here */ break; } if (!np) return ret; parent = of_get_parent(np); if (parent) { if (of_node_is_type(parent, "isa")) ret = 0; of_node_put(parent); } of_node_put(np); return ret; } EXPORT_SYMBOL(check_legacy_ioport); static int ppc_panic_event(struct notifier_block *this, unsigned long event, void *ptr) { /* * panic does a local_irq_disable, but we really * want interrupts to be hard disabled. */ hard_irq_disable(); /* * If firmware-assisted dump has been registered then trigger * firmware-assisted dump and let firmware handle everything else. */ crash_fadump(NULL, ptr); if (ppc_md.panic) ppc_md.panic(ptr); /* May not return */ return NOTIFY_DONE; } static struct notifier_block ppc_panic_block = { .notifier_call = ppc_panic_event, .priority = INT_MIN /* may not return; must be done last */ }; /* * Dump out kernel offset information on panic. */ static int dump_kernel_offset(struct notifier_block *self, unsigned long v, void *p) { pr_emerg("Kernel Offset: 0x%lx from 0x%lx\n", kaslr_offset(), KERNELBASE); return 0; } static struct notifier_block kernel_offset_notifier = { .notifier_call = dump_kernel_offset }; void __init setup_panic(void) { if (IS_ENABLED(CONFIG_RANDOMIZE_BASE) && kaslr_offset() > 0) atomic_notifier_chain_register(&panic_notifier_list, &kernel_offset_notifier); /* PPC64 always does a hard irq disable in its panic handler */ if (!IS_ENABLED(CONFIG_PPC64) && !ppc_md.panic) return; atomic_notifier_chain_register(&panic_notifier_list, &ppc_panic_block); } #ifdef CONFIG_CHECK_CACHE_COHERENCY /* * For platforms that have configurable cache-coherency. This function * checks that the cache coherency setting of the kernel matches the setting * left by the firmware, as indicated in the device tree. Since a mismatch * will eventually result in DMA failures, we print * and error and call * BUG() in that case. */ #define KERNEL_COHERENCY (!IS_ENABLED(CONFIG_NOT_COHERENT_CACHE)) static int __init check_cache_coherency(void) { struct device_node *np; const void *prop; bool devtree_coherency; np = of_find_node_by_path("/"); prop = of_get_property(np, "coherency-off", NULL); of_node_put(np); devtree_coherency = prop ? false : true; if (devtree_coherency != KERNEL_COHERENCY) { printk(KERN_ERR "kernel coherency:%s != device tree_coherency:%s\n", KERNEL_COHERENCY ? "on" : "off", devtree_coherency ? "on" : "off"); BUG(); } return 0; } late_initcall(check_cache_coherency); #endif /* CONFIG_CHECK_CACHE_COHERENCY */ void ppc_printk_progress(char *s, unsigned short hex) { pr_info("%s\n", s); } static __init void print_system_info(void) { pr_info("-----------------------------------------------------\n"); pr_info("phys_mem_size = 0x%llx\n", (unsigned long long)memblock_phys_mem_size()); pr_info("dcache_bsize = 0x%x\n", dcache_bsize); pr_info("icache_bsize = 0x%x\n", icache_bsize); pr_info("cpu_features = 0x%016lx\n", cur_cpu_spec->cpu_features); pr_info(" possible = 0x%016lx\n", (unsigned long)CPU_FTRS_POSSIBLE); pr_info(" always = 0x%016lx\n", (unsigned long)CPU_FTRS_ALWAYS); pr_info("cpu_user_features = 0x%08x 0x%08x\n", cur_cpu_spec->cpu_user_features, cur_cpu_spec->cpu_user_features2); pr_info("mmu_features = 0x%08x\n", cur_cpu_spec->mmu_features); #ifdef CONFIG_PPC64 pr_info("firmware_features = 0x%016lx\n", powerpc_firmware_features); #ifdef CONFIG_PPC_BOOK3S pr_info("vmalloc start = 0x%lx\n", KERN_VIRT_START); pr_info("IO start = 0x%lx\n", KERN_IO_START); pr_info("vmemmap start = 0x%lx\n", (unsigned long)vmemmap); #endif #endif if (!early_radix_enabled()) print_system_hash_info(); if (PHYSICAL_START > 0) pr_info("physical_start = 0x%llx\n", (unsigned long long)PHYSICAL_START); pr_info("-----------------------------------------------------\n"); } #ifdef CONFIG_SMP static void __init smp_setup_pacas(void) { int cpu; for_each_possible_cpu(cpu) { if (cpu == smp_processor_id()) continue; allocate_paca(cpu); set_hard_smp_processor_id(cpu, cpu_to_phys_id[cpu]); } memblock_free(cpu_to_phys_id, nr_cpu_ids * sizeof(u32)); cpu_to_phys_id = NULL; } #endif /* * Called into from start_kernel this initializes memblock, which is used * to manage page allocation until mem_init is called. */ void __init setup_arch(char **cmdline_p) { kasan_init(); *cmdline_p = boot_command_line; /* Set a half-reasonable default so udelay does something sensible */ loops_per_jiffy = 500000000 / HZ; /* Unflatten the device-tree passed by prom_init or kexec */ unflatten_device_tree(); /* * Initialize cache line/block info from device-tree (on ppc64) or * just cputable (on ppc32). */ initialize_cache_info(); /* Initialize RTAS if available. */ rtas_initialize(); /* Check if we have an initrd provided via the device-tree. */ check_for_initrd(); /* Probe the machine type, establish ppc_md. */ probe_machine(); /* Setup panic notifier if requested by the platform. */ setup_panic(); /* * Configure ppc_md.power_save (ppc32 only, 64-bit machines do * it from their respective probe() function. */ setup_power_save(); /* Discover standard serial ports. */ find_legacy_serial_ports(); /* Register early console with the printk subsystem. */ register_early_udbg_console(); /* Setup the various CPU maps based on the device-tree. */ smp_setup_cpu_maps(); /* Initialize xmon. */ xmon_setup(); /* Check the SMT related command line arguments (ppc64). */ check_smt_enabled(); /* Parse memory topology */ mem_topology_setup(); /* * Release secondary cpus out of their spinloops at 0x60 now that * we can map physical -> logical CPU ids. * * Freescale Book3e parts spin in a loop provided by firmware, * so smp_release_cpus() does nothing for them. */ #ifdef CONFIG_SMP smp_setup_pacas(); /* On BookE, setup per-core TLB data structures. */ setup_tlb_core_data(); #endif /* Print various info about the machine that has been gathered so far. */ print_system_info(); /* Reserve large chunks of memory for use by CMA for KVM. */ kvm_cma_reserve(); /* Reserve large chunks of memory for us by CMA for hugetlb */ gigantic_hugetlb_cma_reserve(); klp_init_thread_info(&init_task); setup_initial_init_mm(_stext, _etext, _edata, _end); mm_iommu_init(&init_mm); irqstack_early_init(); exc_lvl_early_init(); emergency_stack_init(); mce_init(); smp_release_cpus(); initmem_init(); early_memtest(min_low_pfn << PAGE_SHIFT, max_low_pfn << PAGE_SHIFT); if (ppc_md.setup_arch) ppc_md.setup_arch(); setup_barrier_nospec(); setup_spectre_v2(); paging_init(); /* Initialize the MMU context management stuff. */ mmu_context_init(); /* Interrupt code needs to be 64K-aligned. */ if (IS_ENABLED(CONFIG_PPC64) && (unsigned long)_stext & 0xffff) panic("Kernelbase not 64K-aligned (0x%lx)!\n", (unsigned long)_stext); }
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
You can’t perform that action at this time.