X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/43866e378188c25dd1e2208016ab3cbeb086ae6c..4a3eedf9ecc9bbe3f3a5c6ce5e53ad199d639d32:/osfmk/ppc/pcb.c?ds=sidebyside diff --git a/osfmk/ppc/pcb.c b/osfmk/ppc/pcb.c index e97068465..38569fc94 100644 --- a/osfmk/ppc/pcb.c +++ b/osfmk/ppc/pcb.c @@ -1,16 +1,19 @@ /* - * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. + * Copyright (c) 2000-2007 Apple Inc. All rights reserved. * - * @APPLE_LICENSE_HEADER_START@ - * - * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved. + * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * * 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. Please obtain a copy of the License at - * http://www.opensource.apple.com/apsl/ and read it before using this - * file. + * 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. + * + * 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 @@ -20,7 +23,7 @@ * 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@ @@ -47,37 +50,44 @@ * Utah $Hdr: pcb.c 1.23 92/06/27$ */ -#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 -#include +#include #include #include +#include +#include #include -extern int real_ncpus; /* Number of actual CPUs */ -extern struct Saveanchor saveanchor; /* Aliged savearea anchor */ +void machine_act_terminate(thread_t); /* * These constants are dumb. They should not be in asm.h! @@ -92,167 +102,104 @@ int vec_trap_count = 0; int vec_switch_count = 0; #endif -extern struct thread_shuttle *Switch_context( - struct thread_shuttle *old, - void (*cont)(void), - struct thread_shuttle *new); - - -#if MACH_LDEBUG || MACH_KDB -void log_thread_action (char *, long, long, long); -#endif - - /* * consider_machine_collect: try to collect machine-dependent pages */ void -consider_machine_collect() +consider_machine_collect(void) { /* - * none currently available + * XXX none currently available */ - return; } void -consider_machine_adjust() +consider_machine_adjust(void) { consider_mapping_adjust(); } - -/* - * stack_attach: Attach a kernel stack to a thread. - */ -void -machine_kernel_stack_init( - struct thread_shuttle *thread, - void (*start_pos)(thread_t)) -{ - vm_offset_t stack; - unsigned int *kss; - struct savearea *sv; - - assert(thread->top_act->mact.pcb); - assert(thread->kernel_stack); - stack = thread->kernel_stack; - -#if MACH_ASSERT - if (watchacts & WA_PCB) - printf("machine_kernel_stack_init(thr=%x,stk=%x,start_pos=%x)\n", thread,stack,start_pos); -#endif /* MACH_ASSERT */ - - kss = (unsigned int *)STACK_IKS(stack); - sv = thread->top_act->mact.pcb; /* This for the sake of C */ - - sv->save_lr = (unsigned int) start_pos; /* Set up the execution address */ - sv->save_srr0 = (unsigned int) start_pos; /* Here too */ - sv->save_srr1 = MSR_SUPERVISOR_INT_OFF; /* Set the normal running MSR */ - sv->save_r1 = (vm_offset_t) ((int)kss - KF_SIZE); /* Point to the top frame on the stack */ - sv->save_fpscr = 0; /* Clear all floating point exceptions */ - sv->save_vrsave = 0; /* Set the vector save state */ - sv->save_vscr[3] = 0x00010000; /* Supress java mode */ - - *((int *)sv->save_r1) = 0; /* Zero the frame backpointer */ - thread->top_act->mact.ksp = 0; /* Show that the kernel stack is in use already */ - -} - /* * switch_context: Switch from one thread to another, needed for * switching of space * */ -struct thread_shuttle* -switch_context( - struct thread_shuttle *old, - void (*continuation)(void), - struct thread_shuttle *new) +thread_t +machine_switch_context( + thread_t old, + thread_continue_t continuation, + thread_t new) { - register thread_act_t old_act = old->top_act, new_act = new->top_act; - register struct thread_shuttle* retval; + register thread_t retval; pmap_t new_pmap; facility_context *fowner; - int my_cpu; - -#if MACH_LDEBUG || MACH_KDB - log_thread_action("switch", - (long)old, - (long)new, - (long)__builtin_return_address(0)); -#endif + struct per_proc_info *ppinfo; - my_cpu = cpu_number(); - per_proc_info[my_cpu].old_thread = (unsigned int)old; - per_proc_info[my_cpu].cpu_flags &= ~traceBE; /* disable branch tracing if on */ - assert(old_act->kernel_loaded || - active_stacks[my_cpu] == old_act->thread->kernel_stack); - - check_simple_locks(); + if (old == new) + panic("machine_switch_context"); + + ppinfo = getPerProc(); /* Get our processor block */ + ppinfo->old_thread = (unsigned int)old; + /* Our context might wake up on another processor, so we must * not keep hot state in our FPU, it must go back to the pcb * so that it can be found by the other if needed */ if(real_ncpus > 1) { /* This is potentially slow, so only do when actually SMP */ - fowner = per_proc_info[my_cpu].FPU_owner; /* Cache this because it may change */ + fowner = ppinfo->FPU_owner; /* Cache this because it may change */ if(fowner) { /* Is there any live context? */ - if(fowner->facAct == old->top_act) { /* Is it for us? */ + if(fowner->facAct == old) { /* Is it for us? */ fpu_save(fowner); /* Yes, save it */ } } - fowner = per_proc_info[my_cpu].VMX_owner; /* Cache this because it may change */ + fowner = ppinfo->VMX_owner; /* Cache this because it may change */ if(fowner) { /* Is there any live context? */ - if(fowner->facAct == old->top_act) { /* Is it for us? */ + if(fowner->facAct == old) { /* Is it for us? */ vec_save(fowner); /* Yes, save it */ } } } -#if DEBUG - if (watchacts & WA_PCB) { - printf("switch_context(0x%08x, 0x%x, 0x%08x)\n", - old,continuation,new); - } -#endif /* DEBUG */ - /* * If old thread is running VM, save per proc userProtKey and FamVMmode spcFlags bits in the thread spcFlags * This bits can be modified in the per proc without updating the thread spcFlags */ - if(old_act->mact.specFlags & runningVM) { - old_act->mact.specFlags &= ~(userProtKey|FamVMmode); - old_act->mact.specFlags |= (per_proc_info[my_cpu].spcFlags) & (userProtKey|FamVMmode); + if(old->machine.specFlags & runningVM) { + old->machine.specFlags &= ~(userProtKey|FamVMmode); + old->machine.specFlags |= (ppinfo->spcFlags) & (userProtKey|FamVMmode); } + old->machine.specFlags &= ~OnProc; + new->machine.specFlags |= OnProc; /* * We do not have to worry about the PMAP module, so switch. * - * We must not use top_act->map since this may not be the actual + * We must not use thread->map since this may not be the actual * task map, but the map being used for a klcopyin/out. */ - if(new_act->mact.specFlags & runningVM) { /* Is the new guy running a VM? */ - pmap_switch(new_act->mact.vmmCEntry->vmmPmap); /* Switch to the VM's pmap */ - per_proc_info[my_cpu].VMMareaPhys = (vm_offset_t)new_act->mact.vmmCEntry->vmmContextPhys; - per_proc_info[my_cpu].FAMintercept = new_act->mact.vmmCEntry->vmmFAMintercept; + if(new->machine.specFlags & runningVM) { /* Is the new guy running a VM? */ + pmap_switch(new->machine.vmmCEntry->vmmPmap); /* Switch to the VM's pmap */ + ppinfo->VMMareaPhys = new->machine.vmmCEntry->vmmContextPhys; + ppinfo->VMMXAFlgs = new->machine.vmmCEntry->vmmXAFlgs; + ppinfo->FAMintercept = new->machine.vmmCEntry->vmmFAMintercept; } else { /* otherwise, we use the task's pmap */ - new_pmap = new_act->task->map->pmap; - if ((old_act->task->map->pmap != new_pmap) || (old_act->mact.specFlags & runningVM)) { + new_pmap = new->task->map->pmap; + if ((old->task->map->pmap != new_pmap) || (old->machine.specFlags & runningVM)) { pmap_switch(new_pmap); /* Switch if there is a change */ } } - KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_SCHED,MACH_SCHED) | DBG_FUNC_NONE, - (int)old, (int)new, old->sched_pri, new->sched_pri, 0); + if(old->machine.umwSpace != invalSpace) { /* Does our old guy have an active window? */ + old->machine.umwSpace |= umwSwitchAway; /* Show we switched away from this guy */ + hw_blow_seg(lowGlo.lgUMWvaddr); /* Blow off the first segment */ + hw_blow_seg(lowGlo.lgUMWvaddr + 0x10000000ULL); /* Blow off the second segment */ + } retval = Switch_context(old, continuation, new); - assert(retval != (struct thread_shuttle*)NULL); - - if (branch_tracing_enabled()) - per_proc_info[my_cpu].cpu_flags |= traceBE; /* restore branch tracing */ + assert(retval != NULL); /* We've returned from having switched context, so we should be * back in the original context. @@ -261,63 +208,33 @@ switch_context( return retval; } -/* - * Alter the thread's state so that a following thread_exception_return - * will make the thread return 'retval' from a syscall. - */ -void -thread_set_syscall_return( - struct thread_shuttle *thread, - kern_return_t retval) -{ - -#if MACH_ASSERT - if (watchacts & WA_PCB) - printf("thread_set_syscall_return(thr=%x,retval=%d)\n", thread,retval); -#endif /* MACH_ASSERT */ - - thread->top_act->mact.pcb->save_r3 = retval; -} - /* * Initialize the machine-dependent state for a new thread. */ kern_return_t -thread_machine_create( - struct thread_shuttle *thread, - thread_act_t thr_act, - void (*start_pos)(thread_t)) +machine_thread_create( + thread_t thread, + task_t task) { + struct savearea *sv; /* Pointer to newly allocated savearea */ - savearea *sv; /* Pointer to newly allocated savearea */ - unsigned int *CIsTooLimited, i; - - -#if MACH_ASSERT - if (watchacts & WA_PCB) - printf("thread_machine_create(thr=%x,thr_act=%x,st=%x)\n", thread, thr_act, start_pos); -#endif /* MACH_ASSERT */ - - hw_atomic_add(&saveanchor.savetarget, 4); /* Account for the number of saveareas we think we "need" + (void)hw_atomic_add(&saveanchor.savetarget, 4); /* Account for the number of saveareas we think we "need" for this activation */ - assert(thr_act->mact.pcb == (savearea *)0); /* Make sure there was no previous savearea */ + assert(thread->machine.pcb == (struct savearea *)0); /* Make sure there was no previous savearea */ sv = save_alloc(); /* Go get us a savearea */ - bzero((char *)((unsigned int)sv + sizeof(savearea_comm)), (sizeof(savearea) - sizeof(savearea_comm))); /* Clear it */ + bzero((char *)((unsigned int)sv + sizeof(savearea_comm)), (sizeof(struct savearea) - sizeof(savearea_comm))); /* Clear it */ sv->save_hdr.save_prev = 0; /* Clear the back pointer */ sv->save_hdr.save_flags = (sv->save_hdr.save_flags & ~SAVtype) | (SAVgeneral << SAVtypeshft); /* Mark as in use */ - sv->save_hdr.save_act = thr_act; /* Set who owns it */ - sv->save_vscr[3] = 0x00010000; /* Supress java mode */ - thr_act->mact.pcb = sv; /* Point to the save area */ - thr_act->mact.curctx = &thr_act->mact.facctx; /* Initialize facility context */ - thr_act->mact.facctx.facAct = thr_act; /* Initialize facility context pointer to activation */ - -#if MACH_ASSERT - if (watchacts & WA_PCB) - printf("pcb_init(%x) pcb=%x\n", thr_act, sv); -#endif /* MACH_ASSERT */ + sv->save_hdr.save_act = thread; /* Set who owns it */ + thread->machine.pcb = sv; /* Point to the save area */ + thread->machine.curctx = &thread->machine.facctx; /* Initialize facility context */ + thread->machine.facctx.facAct = thread; /* Initialize facility context pointer to activation */ + thread->machine.umwSpace = invalSpace; /* Initialize user memory window space to invalid */ + thread->machine.preemption_count = 0; /* Initialize preemption counter */ + /* * User threads will pull their context from the pcb when first * returning to user mode, so fill in all the necessary values. @@ -325,13 +242,16 @@ thread_machine_create( * at the base of the kernel stack (see stack_attach()). */ - sv->save_srr1 = MSR_EXPORT_MASK_SET; /* Set the default user MSR */ + thread->machine.upcb = sv; /* Set user pcb */ + sv->save_srr1 = (uint64_t)MSR_EXPORT_MASK_SET; /* Set the default user MSR */ + if(task_has_64BitAddr(task)) sv->save_srr1 |= (uint64_t)MASK32(MSR_SF) << 32; /* If 64-bit task, force 64-bit mode */ + sv->save_fpscr = 0; /* Clear all floating point exceptions */ + sv->save_vrsave = 0; /* Set the vector save state */ + sv->save_vscr[0] = 0x00000000; + sv->save_vscr[1] = 0x00000000; + sv->save_vscr[2] = 0x00000000; + sv->save_vscr[3] = 0x00010000; /* Disable java mode and clear saturated */ - CIsTooLimited = (unsigned int *)(&sv->save_sr0); /* Make a pointer 'cause C can't cast on the left */ - for(i=0; i<16; i++) { /* Initialize all SRs */ - CIsTooLimited[i] = SEG_REG_PROT | (i << 20) | thr_act->task->map->pmap->space; /* Set the SR value */ - } - return(KERN_SUCCESS); } @@ -339,343 +259,213 @@ thread_machine_create( * Machine-dependent cleanup prior to destroying a thread */ void -thread_machine_destroy( thread_t thread ) -{ - spl_t s; - - if (thread->kernel_stack) { - s = splsched(); - stack_free(thread); - splx(s); - } -} - -/* - * flush out any lazily evaluated HW state in the - * owning thread's context, before termination. - */ -void -thread_machine_flush( thread_act_t cur_act ) +machine_thread_destroy( + thread_t thread) { -} - -/* - * Number of times we needed to swap an activation back in before - * switching to it. - */ -int switch_act_swapins = 0; + struct savearea *local_pcb, *ppsv; + savearea_vec *vsv, *vpsv; + savearea_fpu *fsv, *fpsv; + boolean_t intr; /* - * machine_switch_act - * - * Machine-dependent details of activation switching. Called with - * RPC locks held and preemption disabled. - */ -void -machine_switch_act( - thread_t thread, - thread_act_t old, - thread_act_t new, - int cpu) -{ - pmap_t new_pmap; - facility_context *fowner; - - /* Our context might wake up on another processor, so we must - * not keep hot state in our FPU, it must go back to the pcb - * so that it can be found by the other if needed - */ - if(real_ncpus > 1) { /* This is potentially slow, so only do when actually SMP */ - fowner = per_proc_info[cpu_number()].FPU_owner; /* Cache this because it may change */ - if(fowner) { /* Is there any live context? */ - if(fowner->facAct == old) { /* Is it for us? */ - fpu_save(fowner); /* Yes, save it */ - } - } - fowner = per_proc_info[cpu_number()].VMX_owner; /* Cache this because it may change */ - if(fowner) { /* Is there any live context? */ - if(fowner->facAct == old) { /* Is it for us? */ - vec_save(fowner); /* Yes, save it */ - } - } - } - - active_stacks[cpu] = thread->kernel_stack; - - ast_context(new, cpu); - - /* Activations might have different pmaps - * (process->kernel->server, for example). - * Change space if needed - */ - - if(new->mact.specFlags & runningVM) { /* Is the new guy running a VM? */ - pmap_switch(new->mact.vmmCEntry->vmmPmap); /* Switch to the VM's pmap */ - } - else { /* otherwise, we use the task's pmap */ - new_pmap = new->task->map->pmap; - if ((old->task->map->pmap != new_pmap) || (old->mact.specFlags & runningVM)) { - pmap_switch(new_pmap); - } - } - -} - -void -pcb_user_to_kernel(thread_act_t act) -{ - - return; /* Not needed, I hope... */ -} - - -/* - * act_machine_sv_free - * release saveareas associated with an act. if flag is true, release - * user level savearea(s) too, else don't - * - * this code cannot block so we call the proper save area free routine + * This function will release all context. */ -void -act_machine_sv_free(thread_act_t act) -{ - register savearea *pcb, *userpcb; - register savearea_vec *vsv, *vpsv; - register savearea_fpu *fsv, *fpsv; - register savearea *svp; - register int i; -/* - * This function will release all non-user state context. - */ + machine_act_terminate(thread); /* Make sure all virtual machines are dead first */ /* * - * Walk through and release all floating point and vector contexts that are not - * user state. We will also blow away live context if it belongs to non-user state. + * Walk through and release all floating point and vector contexts. Also kill live context. * */ + + intr = ml_set_interrupts_enabled(FALSE); /* Disable for interruptions */ - if(act->mact.curctx->VMXlevel) { /* Is the current level user state? */ - toss_live_vec(act->mact.curctx); /* Dump live vectors if is not user */ - act->mact.curctx->VMXlevel = 0; /* Mark as user state */ - } + toss_live_vec(thread->machine.curctx); /* Dump live vectors */ - vsv = act->mact.curctx->VMXsave; /* Get the top vector savearea */ - + vsv = thread->machine.curctx->VMXsave; /* Get the top vector savearea */ + while(vsv) { /* Any VMX saved state? */ vpsv = vsv; /* Remember so we can toss this */ - if (!vsv->save_hdr.save_level) break; /* Done when hit user if any */ - vsv = (savearea_vec *)vsv->save_hdr.save_prev; /* Get one underneath our's */ - save_ret((savearea *)vpsv); /* Release it */ + /* XXX save_prev should be a void * 4425537 */ + vsv = CAST_DOWN(savearea_vec *, vsv->save_hdr.save_prev); /* Get one underneath our's */ + save_release((struct savearea *)vpsv); /* Release it */ } - act->mact.curctx->VMXsave = vsv; /* Queue the user context to the top */ + thread->machine.curctx->VMXsave = NULL; /* Kill chain */ - if(act->mact.curctx->FPUlevel) { /* Is the current level user state? */ - toss_live_fpu(act->mact.curctx); /* Dump live float if is not user */ - act->mact.curctx->FPUlevel = 0; /* Mark as user state */ - } + toss_live_fpu(thread->machine.curctx); /* Dump live float */ - fsv = act->mact.curctx->FPUsave; /* Get the top float savearea */ + fsv = thread->machine.curctx->FPUsave; /* Get the top float savearea */ while(fsv) { /* Any float saved state? */ fpsv = fsv; /* Remember so we can toss this */ - if (!fsv->save_hdr.save_level) break; /* Done when hit user if any */ - fsv = (savearea_fpu *)fsv->save_hdr.save_prev; /* Get one underneath our's */ - save_ret((savearea *)fpsv); /* Release it */ + /* XXX save_prev should be a void * 4425537 */ + fsv = CAST_DOWN(savearea_fpu *, fsv->save_hdr.save_prev); /* Get one underneath our's */ + save_release((struct savearea *)fpsv); /* Release it */ } - act->mact.curctx->FPUsave = fsv; /* Queue the user context to the top */ + thread->machine.curctx->FPUsave = NULL; /* Kill chain */ /* - * free all regular saveareas except a user savearea, if any + * free all regular saveareas. */ - pcb = act->mact.pcb; /* Get the general savearea */ - userpcb = 0; /* Assume no user context for now */ + local_pcb = thread->machine.pcb; /* Get the general savearea */ - while(pcb) { /* Any float saved state? */ - if (pcb->save_srr1 & MASK(MSR_PR)) { /* Is this a user savearea? */ - userpcb = pcb; /* Remember so we can toss this */ - break; - } - svp = pcb; /* Remember this */ - pcb = pcb->save_hdr.save_prev; /* Get one underneath our's */ - save_ret(svp); /* Release it */ + while(local_pcb) { /* Any float saved state? */ + ppsv = local_pcb; /* Remember so we can toss this */ + /* XXX save_prev should be a void * 4425537 */ + local_pcb = CAST_DOWN(struct savearea *, local_pcb->save_hdr.save_prev); /* Get one underneath our's */ + save_release(ppsv); /* Release it */ } - act->mact.pcb = userpcb; /* Chain in the user if there is one, or 0 if not */ - -} + (void)hw_atomic_sub(&saveanchor.savetarget, 4); /* Unaccount for the number of saveareas we think we "need" */ + (void) ml_set_interrupts_enabled(intr); /* Restore interrupts if enabled */ -/* - * act_virtual_machine_destroy: - * Shutdown any virtual machines associated with a thread - */ -void -act_virtual_machine_destroy(thread_act_t act) -{ - if(act->mact.bbDescAddr) { /* Check if the Blue box assist is active */ - disable_bluebox_internal(act); /* Kill off bluebox */ - } - - if(act->mact.vmmControl) { /* Check if VMM is active */ - vmm_tear_down_all(act); /* Kill off all VMM contexts */ - } } /* - * act_machine_destroy: Shutdown any state associated with a thread pcb. + * act_machine_sv_free + * release saveareas associated with a thread. if flag is true, release + * user level savearea(s) too, else don't + * + * This code must run with interruptions disabled because an interrupt handler + * could use floating point and/or vectors. If this happens and the thread we + * are blowing off owns the facility, we can deadlock. */ void -act_machine_destroy(thread_act_t act) +act_machine_sv_free(thread_t act, __unused int flag) { - - register savearea *pcb, *ppsv; - register savearea_vec *vsv, *vpsv; - register savearea_fpu *fsv, *fpsv; - register savearea *svp; - register int i; - -#if MACH_ASSERT - if (watchacts & WA_PCB) - printf("act_machine_destroy(0x%x)\n", act); -#endif /* MACH_ASSERT */ + struct savearea *local_pcb, *userpcb; + register savearea_vec *vsv, *vpst, *vsvt; + register savearea_fpu *fsv, *fpst, *fsvt; + struct savearea *svp; + boolean_t intr; /* - * This function will release all context. + * This function will release all non-user state context. */ - - act_virtual_machine_destroy(act); /* Make sure all virtual machines are dead first */ /* * - * Walk through and release all floating point and vector contexts. Also kill live context. + * Walk through and release all floating point and vector contexts that are not + * user state. We will also blow away live context if it belongs to non-user state. + * Note that the level can not change while we are in this code. Nor can another + * context be pushed on the stack. + * + * We do nothing here if the current level is user. Otherwise, + * the live context is cleared. Then we find the user saved context. + * Next, we take the sync lock (to keep us from munging things in *_switch). + * The level is set to 0 and all stacked context other than user is dequeued. + * Then we unlock. Next, all of the old kernel contexts are released. * */ - - toss_live_vec(act->mact.curctx); /* Dump live vectors */ - vsv = act->mact.curctx->VMXsave; /* Get the top vector savearea */ + intr = ml_set_interrupts_enabled(FALSE); /* Disable for interruptions */ + + if(act->machine.curctx->VMXlevel) { /* Is the current level user state? */ + + toss_live_vec(act->machine.curctx); /* Dump live vectors if is not user */ + + if(!hw_lock_to((hw_lock_t)&act->machine.curctx->VMXsync, LockTimeOut)) { /* Get the sync lock */ + panic("act_machine_sv_free - timeout getting VMX sync lock\n"); /* Tell all and die */ + } - while(vsv) { /* Any VMX saved state? */ - vpsv = vsv; /* Remember so we can toss this */ - vsv = (savearea_vec *)vsv->save_hdr.save_prev; /* Get one underneath our's */ - save_release((savearea *)vpsv); /* Release it */ + vsv = act->machine.curctx->VMXsave; /* Get the top vector savearea */ + while(vsv && vsv->save_hdr.save_level) /* Find user context if any */ + /* XXX save_prev should be a void * 4425537 */ + vsv = CAST_DOWN(savearea_vec *, + vsv->save_hdr.save_prev); + + vsvt = act->machine.curctx->VMXsave; /* Get the top of the chain */ + act->machine.curctx->VMXsave = vsv; /* Point to the user context */ + act->machine.curctx->VMXlevel = NULL; /* Set the level to user */ + hw_lock_unlock((hw_lock_t)&act->machine.curctx->VMXsync); /* Unlock */ + + while(vsvt) { /* Clear any VMX saved state */ + if (vsvt == vsv) break; /* Done when hit user if any */ + vpst = vsvt; /* Remember so we can toss this */ + /* XXX save_prev should be a void * 4425537 */ + vsvt = CAST_DOWN(savearea_vec *, vsvt->save_hdr.save_prev); /* Get one underneath our's */ + save_ret((struct savearea *)vpst); /* Release it */ + } + } - - act->mact.curctx->VMXsave = 0; /* Kill chain */ - toss_live_fpu(act->mact.curctx); /* Dump live float */ + if(act->machine.curctx->FPUlevel) { /* Is the current level user state? */ + + toss_live_fpu(act->machine.curctx); /* Dump live floats if is not user */ - fsv = act->mact.curctx->FPUsave; /* Get the top float savearea */ - - while(fsv) { /* Any float saved state? */ - fpsv = fsv; /* Remember so we can toss this */ - fsv = (savearea_fpu *)fsv->save_hdr.save_prev; /* Get one underneath our's */ - save_release((savearea *)fpsv); /* Release it */ + if(!hw_lock_to((hw_lock_t)&act->machine.curctx->FPUsync, LockTimeOut)) { /* Get the sync lock */ + panic("act_machine_sv_free - timeout getting FPU sync lock\n"); /* Tell all and die */ + } + + fsv = act->machine.curctx->FPUsave; /* Get the top floats savearea */ + while(fsv && fsv->save_hdr.save_level) /* Find user context if any */ + /* XXX save_prev should be a void * */ + fsv = CAST_DOWN(savearea_fpu *, fsv->save_hdr.save_prev); + + fsvt = act->machine.curctx->FPUsave; /* Get the top of the chain */ + act->machine.curctx->FPUsave = fsv; /* Point to the user context */ + act->machine.curctx->FPUlevel = NULL; /* Set the level to user */ + hw_lock_unlock((hw_lock_t)&act->machine.curctx->FPUsync); /* Unlock */ + + while(fsvt) { /* Clear any VMX saved state */ + if (fsvt == fsv) break; /* Done when hit user if any */ + fpst = fsvt; /* Remember so we can toss this */ + /* XXX save_prev should be a void * 4425537 */ + fsvt = CAST_DOWN(savearea_fpu *, fsvt->save_hdr.save_prev); /* Get one underneath our's */ + save_ret((struct savearea *)fpst); /* Release it */ + } + } - - act->mact.curctx->FPUsave = 0; /* Kill chain */ /* - * free all regular saveareas. + * free all regular saveareas except a user savearea, if any */ - pcb = act->mact.pcb; /* Get the general savearea */ + local_pcb = act->machine.pcb; /* Get the general savearea */ + userpcb = NULL; /* Assume no user context for now */ - while(pcb) { /* Any float saved state? */ - ppsv = pcb; /* Remember so we can toss this */ - pcb = pcb->save_hdr.save_prev; /* Get one underneath our's */ - save_release(ppsv); /* Release it */ + while(local_pcb) { /* Any float saved state? */ + if (local_pcb->save_srr1 & MASK(MSR_PR)) { /* Is this a user savearea? */ + userpcb = local_pcb; /* Remember so we can toss this */ + break; + } + svp = local_pcb; /* Remember this */ + /* XXX save_prev should be a void * 4425537 */ + local_pcb = CAST_DOWN(struct savearea *, local_pcb->save_hdr.save_prev); /* Get one underneath our's */ + save_ret(svp); /* Release it */ } - hw_atomic_sub(&saveanchor.savetarget, 4); /* Unaccount for the number of saveareas we think we "need" */ + act->machine.pcb = userpcb; /* Chain in the user if there is one, or 0 if not */ + (void) ml_set_interrupts_enabled(intr); /* Restore interrupts if enabled */ } - -kern_return_t -act_machine_create(task_t task, thread_act_t thr_act) -{ - /* - * Clear & Init the pcb (sets up user-mode s regs) - * We don't use this anymore. - */ - - return KERN_SUCCESS; -} - -void act_machine_init() -{ -#if MACH_ASSERT - if (watchacts & WA_PCB) - printf("act_machine_init()\n"); -#endif /* MACH_ASSERT */ - - /* Good to verify these once */ - assert( THREAD_MACHINE_STATE_MAX <= THREAD_STATE_MAX ); - - assert( THREAD_STATE_MAX >= PPC_THREAD_STATE_COUNT ); - assert( THREAD_STATE_MAX >= PPC_EXCEPTION_STATE_COUNT ); - assert( THREAD_STATE_MAX >= PPC_FLOAT_STATE_COUNT ); - - /* - * If we start using kernel activations, - * would normally create kernel_thread_pool here, - * populating it from the act_zone - */ -} - void -act_machine_return(int code) +machine_act_terminate( + thread_t act) { - thread_act_t thr_act = current_act(); - -#if MACH_ASSERT - if (watchacts & WA_EXIT) - printf("act_machine_return(0x%x) cur_act=%x(%d) thr=%x(%d)\n", - code, thr_act, thr_act->ref_count, - thr_act->thread, thr_act->thread->ref_count); -#endif /* MACH_ASSERT */ - - - /* - * This code is called with nothing locked. - * It also returns with nothing locked, if it returns. - * - * This routine terminates the current thread activation. - * If this is the only activation associated with its - * thread shuttle, then the entire thread (shuttle plus - * activation) is terminated. - */ - assert( code == KERN_TERMINATED ); - assert( thr_act ); - assert(thr_act->thread->top_act == thr_act); - - /* This is the only activation attached to the shuttle... */ - - thread_terminate_self(); - - /*NOTREACHED*/ - panic("act_machine_return: TALKING ZOMBIE! (1)"); + if(act->machine.bbDescAddr) { /* Check if the Blue box assist is active */ + disable_bluebox_internal(act); /* Kill off bluebox */ + } + + if(act->machine.vmmControl) { /* Check if VMM is active */ + vmm_tear_down_all(act); /* Kill off all VMM contexts */ + } } void -thread_machine_set_current(struct thread_shuttle *thread) +machine_thread_terminate_self(void) { - register int my_cpu = cpu_number(); - - set_machine_current_thread(thread); - set_machine_current_act(thread->top_act); - - active_kloaded[my_cpu] = thread->top_act->kernel_loaded ? thread->top_act : THR_ACT_NULL; + machine_act_terminate(current_thread()); } void -thread_machine_init(void) +machine_thread_init(void) { #ifdef MACHINE_STACK #if KERNEL_STACK_SIZE > PPC_PGBYTES @@ -685,41 +475,17 @@ thread_machine_init(void) } #if MACH_ASSERT - void dump_thread(thread_t th) { - printf(" thread @ 0x%x:\n", th); -} - -int - dump_act(thread_act_t thr_act) -{ - if (!thr_act) - return(0); - - printf("thr_act(0x%x)(%d): thread=%x(%d) task=%x(%d)\n", - thr_act, thr_act->ref_count, - thr_act->thread, thr_act->thread ? thr_act->thread->ref_count:0, - thr_act->task, thr_act->task ? thr_act->task->ref_count : 0); - - printf("\talerts=%x mask=%x susp=%x active=%x hi=%x lo=%x\n", - thr_act->alerts, thr_act->alert_mask, - thr_act->suspend_count, thr_act->active, - thr_act->higher, thr_act->lower); - - return((int)thr_act); + printf(" thread @ %p:\n", th); } +#endif /* MACH_ASSERT */ -#endif - -unsigned int -get_useraddr() +user_addr_t +get_useraddr(void) { - - thread_act_t thr_act = current_act(); - - return(thr_act->mact.pcb->save_srr0); + return(current_thread()->machine.upcb->save_srr0); } /* @@ -727,7 +493,8 @@ get_useraddr() */ vm_offset_t -stack_detach(thread_t thread) +machine_stack_detach( + thread_t thread) { vm_offset_t stack; @@ -735,8 +502,7 @@ stack_detach(thread_t thread) thread, thread->priority, thread->sched_pri, 0, 0); - if (thread->top_act) - act_machine_sv_free(thread->top_act); + act_machine_sv_free(thread, 0); /* XXX flag == 0 OK? */ stack = thread->kernel_stack; thread->kernel_stack = 0; @@ -756,18 +522,16 @@ stack_detach(thread_t thread) */ void -stack_attach(struct thread_shuttle *thread, - vm_offset_t stack, - void (*start_pos)(thread_t)) +machine_stack_attach( + thread_t thread, + vm_offset_t stack) { - thread_act_t thr_act; unsigned int *kss; struct savearea *sv; KERNEL_DEBUG(MACHDBG_CODE(DBG_MACH_SCHED,MACH_STACK_ATTACH), thread, thread->priority, - thread->sched_pri, start_pos, - 0); + thread->sched_pri, 0, 0); assert(stack); kss = (unsigned int *)STACK_IKS(stack); @@ -775,25 +539,22 @@ stack_attach(struct thread_shuttle *thread, /* during initialization we sometimes do not have an activation. in that case do not do anything */ - if ((thr_act = thread->top_act) != 0) { - sv = save_get(); /* cannot block */ - sv->save_hdr.save_flags = (sv->save_hdr.save_flags & ~SAVtype) | (SAVgeneral << SAVtypeshft); /* Mark as in use */ - sv->save_hdr.save_act = thr_act; - sv->save_hdr.save_prev = thr_act->mact.pcb; - thr_act->mact.pcb = sv; - - sv->save_srr0 = (unsigned int) start_pos; - /* sv->save_r3 = ARG ? */ - sv->save_r1 = (vm_offset_t)((int)kss - KF_SIZE); - sv->save_srr1 = MSR_SUPERVISOR_INT_OFF; - sv->save_fpscr = 0; /* Clear all floating point exceptions */ - sv->save_vrsave = 0; /* Set the vector save state */ - sv->save_vscr[3] = 0x00010000; /* Supress java mode */ - *((int *)sv->save_r1) = 0; - thr_act->mact.ksp = 0; - } - - return; + sv = save_get(); /* cannot block */ + sv->save_hdr.save_flags = (sv->save_hdr.save_flags & ~SAVtype) | (SAVgeneral << SAVtypeshft); /* Mark as in use */ + sv->save_hdr.save_act = thread; + sv->save_hdr.save_prev = (addr64_t)((uintptr_t)thread->machine.pcb); + thread->machine.pcb = sv; + + sv->save_srr0 = (unsigned int)thread_continue; + /* sv->save_r3 = ARG ? */ + sv->save_r1 = (vm_offset_t)((int)kss - KF_SIZE); + sv->save_srr1 = MSR_SUPERVISOR_INT_OFF; + sv->save_fpscr = 0; /* Clear all floating point exceptions */ + sv->save_vrsave = 0; /* Set the vector save state */ + sv->save_vscr[3] = 0x00010000; /* Supress java mode */ + *(CAST_DOWN(int *, sv->save_r1)) = 0; + + thread->machine.ksp = 0; } /* @@ -801,120 +562,111 @@ stack_attach(struct thread_shuttle *thread, */ void -stack_handoff(thread_t old, - thread_t new) +machine_stack_handoff( + thread_t old, + thread_t new) { vm_offset_t stack; pmap_t new_pmap; facility_context *fowner; - int my_cpu; + mapping_t *mp; + struct per_proc_info *ppinfo; - assert(new->top_act); - assert(old->top_act); + assert(new); + assert(old); + + if (old == new) + panic("machine_stack_handoff"); - my_cpu = cpu_number(); - stack = stack_detach(old); + stack = machine_stack_detach(old); new->kernel_stack = stack; - if (stack == old->stack_privilege) { - assert(new->stack_privilege); - old->stack_privilege = new->stack_privilege; - new->stack_privilege = stack; + if (stack == old->reserved_stack) { + assert(new->reserved_stack); + old->reserved_stack = new->reserved_stack; + new->reserved_stack = stack; } - per_proc_info[my_cpu].cpu_flags &= ~traceBE; + ppinfo = getPerProc(); /* Get our processor block */ if(real_ncpus > 1) { /* This is potentially slow, so only do when actually SMP */ - fowner = per_proc_info[my_cpu].FPU_owner; /* Cache this because it may change */ + fowner = ppinfo->FPU_owner; /* Cache this because it may change */ if(fowner) { /* Is there any live context? */ - if(fowner->facAct == old->top_act) { /* Is it for us? */ + if(fowner->facAct == old) { /* Is it for us? */ fpu_save(fowner); /* Yes, save it */ } } - fowner = per_proc_info[my_cpu].VMX_owner; /* Cache this because it may change */ + fowner = ppinfo->VMX_owner; /* Cache this because it may change */ if(fowner) { /* Is there any live context? */ - if(fowner->facAct == old->top_act) { /* Is it for us? */ + if(fowner->facAct == old) { /* Is it for us? */ vec_save(fowner); /* Yes, save it */ } } } + /* * If old thread is running VM, save per proc userProtKey and FamVMmode spcFlags bits in the thread spcFlags * This bits can be modified in the per proc without updating the thread spcFlags */ - if(old->top_act->mact.specFlags & runningVM) { /* Is the current thread running a VM? */ - old->top_act->mact.specFlags &= ~(userProtKey|FamVMmode); - old->top_act->mact.specFlags |= (per_proc_info[my_cpu].spcFlags) & (userProtKey|FamVMmode); + if(old->machine.specFlags & runningVM) { /* Is the current thread running a VM? */ + old->machine.specFlags &= ~(userProtKey|FamVMmode); + old->machine.specFlags |= (ppinfo->spcFlags) & (userProtKey|FamVMmode); } - - KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_SCHED,MACH_STACK_HANDOFF) | DBG_FUNC_NONE, - (int)old, (int)new, old->sched_pri, new->sched_pri, 0); - - - if(new->top_act->mact.specFlags & runningVM) { /* Is the new guy running a VM? */ - pmap_switch(new->top_act->mact.vmmCEntry->vmmPmap); /* Switch to the VM's pmap */ - per_proc_info[my_cpu].VMMareaPhys = (vm_offset_t)new->top_act->mact.vmmCEntry->vmmContextPhys; - per_proc_info[my_cpu].FAMintercept = new->top_act->mact.vmmCEntry->vmmFAMintercept; + old->machine.specFlags &= ~OnProc; + new->machine.specFlags |= OnProc; + + if(new->machine.specFlags & runningVM) { /* Is the new guy running a VM? */ + pmap_switch(new->machine.vmmCEntry->vmmPmap); /* Switch to the VM's pmap */ + ppinfo->VMMareaPhys = new->machine.vmmCEntry->vmmContextPhys; + ppinfo->VMMXAFlgs = new->machine.vmmCEntry->vmmXAFlgs; + ppinfo->FAMintercept = new->machine.vmmCEntry->vmmFAMintercept; } else { /* otherwise, we use the task's pmap */ - new_pmap = new->top_act->task->map->pmap; - if ((old->top_act->task->map->pmap != new_pmap) || (old->top_act->mact.specFlags & runningVM)) { + new_pmap = new->task->map->pmap; + if ((old->task->map->pmap != new_pmap) || (old->machine.specFlags & runningVM)) { pmap_switch(new_pmap); } } - thread_machine_set_current(new); - active_stacks[my_cpu] = new->kernel_stack; - per_proc_info[my_cpu].Uassist = new->top_act->mact.cthread_self; + machine_set_current_thread(new); + ppinfo->Uassist = new->machine.cthread_self; - per_proc_info[my_cpu].ppbbTaskEnv = new->top_act->mact.bbTaskEnv; - per_proc_info[my_cpu].spcFlags = new->top_act->mact.specFlags; + ppinfo->ppbbTaskEnv = new->machine.bbTaskEnv; + ppinfo->spcFlags = new->machine.specFlags; + + old->machine.umwSpace |= umwSwitchAway; /* Show we switched away from this guy */ + mp = (mapping_t *)&ppinfo->ppUMWmp; + mp->mpSpace = invalSpace; /* Since we can't handoff in the middle of copy in/out, just invalidate */ - if (branch_tracing_enabled()) - per_proc_info[my_cpu].cpu_flags |= traceBE; - - if(trcWork.traceMask) dbgTrace(0x12345678, (unsigned int)old->top_act, (unsigned int)new->top_act); /* Cut trace entry if tracing */ + if(trcWork.traceMask) dbgTrace(0x9903, (unsigned int)old, (unsigned int)new, 0, 0); /* Cut trace entry if tracing */ return; } +void Call_continuation(thread_continue_t, void *, wait_result_t, vm_offset_t); + /* * clean and initialize the current kernel stack and go to * the given continuation routine */ void -call_continuation(void (*continuation)(void) ) +call_continuation( + thread_continue_t continuation, + void *parameter, + wait_result_t wresult) { + thread_t self = current_thread(); + unsigned int *kss; + vm_offset_t tsp; - unsigned int *kss; - vm_offset_t tsp; - - assert(current_thread()->kernel_stack); - kss = (unsigned int *)STACK_IKS(current_thread()->kernel_stack); - assert(continuation); + assert(self->kernel_stack); + kss = (unsigned int *)STACK_IKS(self->kernel_stack); + assert(continuation); - tsp = (vm_offset_t)((int)kss - KF_SIZE); - assert(tsp); - *((int *)tsp) = 0; - - Call_continuation(continuation, tsp); - - return; -} - -void -thread_swapin_mach_alloc(thread_t thread) -{ - struct savearea *sv; - - assert(thread->top_act->mact.pcb == 0); - - sv = save_alloc(); - assert(sv); - sv->save_hdr.save_prev = 0; /* Initialize back chain */ - sv->save_hdr.save_flags = (sv->save_hdr.save_flags & ~SAVtype) | (SAVgeneral << SAVtypeshft); /* Mark as in use */ - sv->save_hdr.save_act = thread->top_act; /* Initialize owner */ - thread->top_act->mact.pcb = sv; + tsp = (vm_offset_t)((int)kss - KF_SIZE); + assert(tsp); + *((int *)tsp) = 0; + Call_continuation(continuation, parameter, wresult, tsp); }