iCE40/nextpnr - [no description]

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author	myrtle <gatecat@ds0.me>	2022-12-09 09:27:58 +0100
committer	GitHub <noreply@github.com>	2022-12-09 09:27:58 +0100
commit	b5d30c73877be032c1d87cd820ebdfe4db556fdb (patch)
tree	aeb5acbc8879a34f72486fc62bb4777c644e0555 /3rdparty/imgui/examples/imgui_impl_dx10.h
parent	0eb53d59d84ea1c46de7d9e25eb5a9901544202d (diff)
parent	aa8359c73e47ca3fed620dbab9ef7ce8d4a6732c (diff)
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Merge pull request #1060 from yrabbit/pll-inputs

gowin: BUGFIX: Correctly handle resets

Diffstat (limited to '3rdparty/imgui/examples/imgui_impl_dx10.h')

0 files changed, 0 insertions, 0 deletions

/* * linux/arch/x86-64/kernel/process.c * * Copyright (C) 1995 Linus Torvalds * * Pentium III FXSR, SSE support * Gareth Hughes <gareth@valinux.com>, May 2000 * * X86-64 port * Andi Kleen. * * CPU hotplug support - ashok.raj@intel.com * $Id: process.c,v 1.38 2002/01/15 10:08:03 ak Exp $ * * Jun Nakajima <jun.nakajima@intel.com> * Modified for Xen */ /* * This file handles the architecture-dependent parts of process handling.. */ #include <stdarg.h> #include <linux/cpu.h> #include <linux/errno.h> #include <linux/sched.h> #include <linux/kernel.h> #include <linux/mm.h> #include <linux/elfcore.h> #include <linux/smp.h> #include <linux/slab.h> #include <linux/user.h> #include <linux/module.h> #include <linux/a.out.h> #include <linux/interrupt.h> #include <linux/delay.h> #include <linux/ptrace.h> #include <linux/utsname.h> #include <linux/random.h> #include <linux/kprobes.h> #include <linux/notifier.h> #include <asm/uaccess.h> #include <asm/pgtable.h> #include <asm/system.h> #include <asm/io.h> #include <asm/processor.h> #include <asm/i387.h> #include <asm/mmu_context.h> #include <asm/pda.h> #include <asm/prctl.h> #include <asm/kdebug.h> #include <xen/interface/dom0_ops.h> #include <xen/interface/physdev.h> #include <xen/interface/vcpu.h> #include <asm/desc.h> #include <asm/proto.h> #include <asm/hardirq.h> #include <asm/ia32.h> #include <asm/idle.h> #include <xen/cpu_hotplug.h> asmlinkage extern void ret_from_fork(void); unsigned long kernel_thread_flags = CLONE_VM | CLONE_UNTRACED; unsigned long boot_option_idle_override = 0; EXPORT_SYMBOL(boot_option_idle_override); /* * Powermanagement idle function, if any.. */ void (*pm_idle)(void); static DEFINE_PER_CPU(unsigned int, cpu_idle_state); static struct notifier_block *idle_notifier; static DEFINE_SPINLOCK(idle_notifier_lock); void idle_notifier_register(struct notifier_block *n) { unsigned long flags; spin_lock_irqsave(&idle_notifier_lock, flags); notifier_chain_register(&idle_notifier, n); spin_unlock_irqrestore(&idle_notifier_lock, flags); } EXPORT_SYMBOL_GPL(idle_notifier_register); void idle_notifier_unregister(struct notifier_block *n) { unsigned long flags; spin_lock_irqsave(&idle_notifier_lock, flags); notifier_chain_unregister(&idle_notifier, n); spin_unlock_irqrestore(&idle_notifier_lock, flags); } EXPORT_SYMBOL(idle_notifier_unregister); enum idle_state { CPU_IDLE, CPU_NOT_IDLE }; static DEFINE_PER_CPU(enum idle_state, idle_state) = CPU_NOT_IDLE; void enter_idle(void) { __get_cpu_var(idle_state) = CPU_IDLE; notifier_call_chain(&idle_notifier, IDLE_START, NULL); } static void __exit_idle(void) { __get_cpu_var(idle_state) = CPU_NOT_IDLE; notifier_call_chain(&idle_notifier, IDLE_END, NULL); } /* Called from interrupts to signify idle end */ void exit_idle(void) { if (current->pid | read_pda(irqcount)) return; __exit_idle(); } /* XXX XEN doesn't use default_idle(), poll_idle(). Use xen_idle() instead. */ void xen_idle(void) { local_irq_disable(); if (need_resched()) local_irq_enable(); else { clear_thread_flag(TIF_POLLING_NRFLAG); smp_mb__after_clear_bit(); safe_halt(); set_thread_flag(TIF_POLLING_NRFLAG); } } #ifdef CONFIG_HOTPLUG_CPU static inline void play_dead(void) { idle_task_exit(); local_irq_disable(); cpu_clear(smp_processor_id(), cpu_initialized); preempt_enable_no_resched(); HYPERVISOR_vcpu_op(VCPUOP_down, smp_processor_id(), NULL); cpu_bringup(); } #else static inline void play_dead(void) { BUG(); } #endif /* CONFIG_HOTPLUG_CPU */ /* * The idle thread. There's no useful work to be * done, so just try to conserve power and have a * low exit latency (ie sit in a loop waiting for * somebody to say that they'd like to reschedule) */ void cpu_idle (void) { set_thread_flag(TIF_POLLING_NRFLAG); /* endless idle loop with no priority at all */ while (1) { while (!need_resched()) { if (__get_cpu_var(cpu_idle_state)) __get_cpu_var(cpu_idle_state) = 0; rmb(); if (cpu_is_offline(smp_processor_id())) play_dead(); enter_idle(); xen_idle(); __exit_idle(); } preempt_enable_no_resched(); schedule(); preempt_disable(); } } void cpu_idle_wait(void) { unsigned int cpu, this_cpu = get_cpu(); cpumask_t map; set_cpus_allowed(current, cpumask_of_cpu(this_cpu)); put_cpu(); cpus_clear(map); for_each_online_cpu(cpu) { per_cpu(cpu_idle_state, cpu) = 1; cpu_set(cpu, map); } __get_cpu_var(cpu_idle_state) = 0; wmb(); do { ssleep(1); for_each_online_cpu(cpu) { if (cpu_isset(cpu, map) && !per_cpu(cpu_idle_state, cpu)) cpu_clear(cpu, map); } cpus_and(map, map, cpu_online_map); } while (!cpus_empty(map)); } EXPORT_SYMBOL_GPL(cpu_idle_wait); /* XXX XEN doesn't use mwait_idle(), select_idle_routine(), idle_setup(). */ /* Always use xen_idle() instead. */ void __cpuinit select_idle_routine(const struct cpuinfo_x86 *c) {} /* Prints also some state that isn't saved in the pt_regs */ void __show_regs(struct pt_regs * regs) { unsigned long fs, gs, shadowgs; unsigned int fsindex,gsindex; unsigned int ds,cs,es; printk("\n"); print_modules(); printk("Pid: %d, comm: %.20s %s %s %.*s\n", current->pid, current->comm, print_tainted(), system_utsname.release, (int)strcspn(system_utsname.version, " "), system_utsname.version); printk("RIP: %04lx:[<%016lx>] ", regs->cs & 0xffff, regs->rip); printk_address(regs->rip); printk("\nRSP: %04lx:%016lx EFLAGS: %08lx\n", regs->ss, regs->rsp, regs->eflags); printk("RAX: %016lx RBX: %016lx RCX: %016lx\n", regs->rax, regs->rbx, regs->rcx); printk("RDX: %016lx RSI: %016lx RDI: %016lx\n", regs->rdx, regs->rsi, regs->rdi); printk("RBP: %016lx R08: %016lx R09: %016lx\n", regs->rbp, regs->r8, regs->r9); printk("R10: %016lx R11: %016lx R12: %016lx\n", regs->r10, regs->r11, regs->r12); printk("R13: %016lx R14: %016lx R15: %016lx\n", regs->r13, regs->r14, regs->r15); asm("mov %%ds,%0" : "=r" (ds)); asm("mov %%cs,%0" : "=r" (cs)); asm("mov %%es,%0" : "=r" (es)); asm("mov %%fs,%0" : "=r" (fsindex)); asm("mov %%gs,%0" : "=r" (gsindex)); rdmsrl(MSR_FS_BASE, fs); rdmsrl(MSR_GS_BASE, gs); rdmsrl(MSR_KERNEL_GS_BASE, shadowgs); printk("FS: %016lx(%04x) GS:%016lx(%04x) knlGS:%016lx\n", fs,fsindex,gs,gsindex,shadowgs); printk("CS: %04x DS: %04x ES: %04x\n", cs, ds, es); } void show_regs(struct pt_regs *regs) { printk("CPU %d:", smp_processor_id()); __show_regs(regs); show_trace(&regs->rsp); } /* * Free current thread data structures etc.. */ void exit_thread(void) { struct task_struct *me = current; struct thread_struct *t = &me->thread; /* * Remove function-return probe instances associated with this task * and put them back on the free list. Do not insert an exit probe for * this function, it will be disabled by kprobe_flush_task if you do. */ kprobe_flush_task(me); if (me->thread.io_bitmap_ptr) { #ifndef CONFIG_X86_NO_TSS struct tss_struct *tss = &per_cpu(init_tss, get_cpu()); #endif #ifdef CONFIG_XEN struct physdev_set_iobitmap iobmp_op = { 0 }; #endif kfree(t->io_bitmap_ptr); t->io_bitmap_ptr = NULL; /* * Careful, clear this in the TSS too: */ #ifndef CONFIG_X86_NO_TSS memset(tss->io_bitmap, 0xff, t->io_bitmap_max); put_cpu(); #endif #ifdef CONFIG_XEN HYPERVISOR_physdev_op(PHYSDEVOP_set_iobitmap, &iobmp_op); #endif t->io_bitmap_max = 0; } } void load_gs_index(unsigned gs) { HYPERVISOR_set_segment_base(SEGBASE_GS_USER_SEL, gs); } void flush_thread(void) { struct task_struct *tsk = current; struct thread_info *t = current_thread_info(); if (t->flags & _TIF_ABI_PENDING) t->flags ^= (_TIF_ABI_PENDING | _TIF_IA32); tsk->thread.debugreg0 = 0; tsk->thread.debugreg1 = 0; tsk->thread.debugreg2 = 0; tsk->thread.debugreg3 = 0; tsk->thread.debugreg6 = 0; tsk->thread.debugreg7 = 0; memset(tsk->thread.tls_array, 0, sizeof(tsk->thread.tls_array)); /* * Forget coprocessor state.. */ clear_fpu(tsk); clear_used_math(); } void release_thread(struct task_struct *dead_task) { if (dead_task->mm) { if (dead_task->mm->context.size) { printk("WARNING: dead process %8s still has LDT? <%p/%d>\n", dead_task->comm, dead_task->mm->context.ldt, dead_task->mm->context.size); BUG(); } } } static inline void set_32bit_tls(struct task_struct *t, int tls, u32 addr) { struct user_desc ud = { .base_addr = addr, .limit = 0xfffff, .contents = (3 << 3), /* user */ .seg_32bit = 1, .limit_in_pages = 1, .useable = 1, }; struct n_desc_struct *desc = (void *)t->thread.tls_array; desc += tls; desc->a = LDT_entry_a(&ud); desc->b = LDT_entry_b(&ud); } static inline u32 read_32bit_tls(struct task_struct *t, int tls) { struct desc_struct *desc = (void *)t->thread.tls_array; desc += tls; return desc->base0 | (((u32)desc->base1) << 16) | (((u32)desc->base2) << 24); } /* * This gets called before we allocate a new thread and copy * the current task into it. */ void prepare_to_copy(struct task_struct *tsk) { unlazy_fpu(tsk); } int copy_thread(int nr, unsigned long clone_flags, unsigned long rsp, unsigned long unused, struct task_struct * p, struct pt_regs * regs) { int err; struct pt_regs * childregs; struct task_struct *me = current; childregs = ((struct pt_regs *) (THREAD_SIZE + task_stack_page(p))) - 1; *childregs = *regs; childregs->rax = 0; childregs->rsp = rsp; if (rsp == ~0UL) childregs->rsp = (unsigned long)childregs; p->thread.rsp = (unsigned long) childregs; p->thread.rsp0 = (unsigned long) (childregs+1); p->thread.userrsp = me->thread.userrsp; set_tsk_thread_flag(p, TIF_FORK); p->thread.fs = me->thread.fs; p->thread.gs = me->thread.gs; asm("mov %%gs,%0" : "=m" (p->thread.gsindex)); asm("mov %%fs,%0" : "=m" (p->thread.fsindex)); asm("mov %%es,%0" : "=m" (p->thread.es)); asm("mov %%ds,%0" : "=m" (p->thread.ds)); if (unlikely(me->thread.io_bitmap_ptr != NULL)) { p->thread.io_bitmap_ptr = kmalloc(IO_BITMAP_BYTES, GFP_KERNEL); if (!p->thread.io_bitmap_ptr) { p->thread.io_bitmap_max = 0; return -ENOMEM; } memcpy(p->thread.io_bitmap_ptr, me->thread.io_bitmap_ptr, IO_BITMAP_BYTES); } /* * Set a new TLS for the child thread? */ if (clone_flags & CLONE_SETTLS) { #ifdef CONFIG_IA32_EMULATION if (test_thread_flag(TIF_IA32)) err = ia32_child_tls(p, childregs); else #endif err = do_arch_prctl(p, ARCH_SET_FS, childregs->r8); if (err) goto out; } p->thread.iopl = current->thread.iopl; err = 0; out: if (err && p->thread.io_bitmap_ptr) { kfree(p->thread.io_bitmap_ptr); p->thread.io_bitmap_max = 0; } return err; } static inline void __save_init_fpu( struct task_struct *tsk ) { asm volatile( "rex64 ; fxsave %0 ; fnclex" : "=m" (tsk->thread.i387.fxsave)); tsk->thread_info->status &= ~TS_USEDFPU; } /* * switch_to(x,y) should switch tasks from x to y. * * This could still be optimized: * - fold all the options into a flag word and test it with a single test. * - could test fs/gs bitsliced * * Kprobes not supported here. Set the probe on schedule instead. */ __kprobes struct task_struct * __switch_to(struct task_struct *prev_p, struct task_struct *next_p) { struct thread_struct *prev = &prev_p->thread, *next = &next_p->thread; int cpu = smp_processor_id(); #ifndef CONFIG_X86_NO_TSS struct tss_struct *tss = &per_cpu(init_tss, cpu); #endif struct physdev_set_iopl iopl_op; struct physdev_set_iobitmap iobmp_op; multicall_entry_t _mcl[8], *mcl = _mcl; /* * This is basically '__unlazy_fpu', except that we queue a * multicall to indicate FPU task switch, rather than * synchronously trapping to Xen. * This must be here to ensure both math_state_restore() and * kernel_fpu_begin() work consistently. * The AMD workaround requires it to be after DS reload, or * after DS has been cleared, which we do in __prepare_arch_switch. */ if (prev_p->thread_info->status & TS_USEDFPU) { __save_init_fpu(prev_p); /* _not_ save_init_fpu() */ mcl->op = __HYPERVISOR_fpu_taskswitch; mcl->args[0] = 1; mcl++; } /* * Reload esp0, LDT and the page table pointer: */ mcl->op = __HYPERVISOR_stack_switch; mcl->args[0] = __KERNEL_DS; mcl->args[1] = next->rsp0; mcl++; /* * Load the per-thread Thread-Local Storage descriptor. * This is load_TLS(next, cpu) with multicalls. */ #define C(i) do { \ if (unlikely(next->tls_array[i] != prev->tls_array[i])) { \ mcl->op = __HYPERVISOR_update_descriptor; \ mcl->args[0] = virt_to_machine( \ &cpu_gdt(cpu)[GDT_ENTRY_TLS_MIN + i]); \ mcl->args[1] = next->tls_array[i]; \ mcl++; \ } \ } while (0) C(0); C(1); C(2); #undef C if (unlikely(prev->iopl != next->iopl)) { iopl_op.iopl = (next->iopl == 0) ? 1 : next->iopl; mcl->op = __HYPERVISOR_physdev_op; mcl->args[0] = PHYSDEVOP_set_iopl; mcl->args[1] = (unsigned long)&iopl_op; mcl++; } if (unlikely(prev->io_bitmap_ptr || next->io_bitmap_ptr)) { iobmp_op.bitmap = (char *)next->io_bitmap_ptr; iobmp_op.nr_ports = next->io_bitmap_ptr ? IO_BITMAP_BITS : 0; mcl->op = __HYPERVISOR_physdev_op; mcl->args[0] = PHYSDEVOP_set_iobitmap; mcl->args[1] = (unsigned long)&iobmp_op; mcl++; } (void)HYPERVISOR_multicall(_mcl, mcl - _mcl); /* * Switch DS and ES. * This won't pick up thread selector changes, but I guess that is ok. */ if (unlikely(next->es)) loadsegment(es, next->es); if (unlikely(next->ds)) loadsegment(ds, next->ds); /* * Switch FS and GS. */ if (unlikely(next->fsindex)) loadsegment(fs, next->fsindex); if (next->fs) HYPERVISOR_set_segment_base(SEGBASE_FS, next->fs); if (unlikely(next->gsindex)) load_gs_index(next->gsindex); if (next->gs) HYPERVISOR_set_segment_base(SEGBASE_GS_USER, next->gs); /* * Switch the PDA context. */ prev->userrsp = read_pda(oldrsp); write_pda(oldrsp, next->userrsp); write_pda(pcurrent, next_p); write_pda(kernelstack, task_stack_page(next_p) + THREAD_SIZE - PDA_STACKOFFSET); /* * Now maybe reload the debug registers */ if (unlikely(next->debugreg7)) { set_debugreg(next->debugreg0, 0); set_debugreg(next->debugreg1, 1); set_debugreg(next->debugreg2, 2); set_debugreg(next->debugreg3, 3);


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