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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/lib/ppc405lib/ssx_dump.c $ */
/* */
/* OpenPOWER OnChipController Project */
/* */
/* Contributors Listed Below - COPYRIGHT 2015,2016 */
/* [+] International Business Machines Corp. */
/* */
/* */
/* Licensed under the Apache License, Version 2.0 (the "License"); */
/* you may not use this file except in compliance with the License. */
/* You may obtain a copy of the License at */
/* */
/* http://www.apache.org/licenses/LICENSE-2.0 */
/* */
/* Unless required by applicable law or agreed to in writing, software */
/* distributed under the License is distributed on an "AS IS" BASIS, */
/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or */
/* implied. See the License for the specific language governing */
/* permissions and limitations under the License. */
/* */
/* IBM_PROLOG_END_TAG */
/// \file ssx_dump.c
/// \brief Routines for dumping SSX kernel data structures
///
/// \note This is a quick hack to help solve a P8 bringup issue. This code is
/// PPC405 (OCC) specific, i.e., not "portable" SSX. Ideally this type of dump
/// would be implemented in an external debugging tool as well, however it's
/// simplest to implement here in the execution context.
#include "ssx_dump.h"
#define SSX_DUMP_UNIMPLEMENTED 0x00d86701
static const char* _threadState[] = {
0,
"Suspended Runnable",
"Mapped",
"Suspended Blocked",
"Completed",
"Deleted",
};
static const char* _threadFlags[] = {
0,
"Semaphore Pend",
"Timer Pend",
"Timer Pend | Semaphore Pend",
"Timed Out",
"Timed Out | Semaphore Pend",
"Timed Out | Timer Pend",
"Timed Out | Timer Pend | Semaphore Pend",
};
static void
_dumpTimer(FILE* stream, SsxTimer* timer)
{
fprintf(stream,
"-- Timer @ %p\n"
"-- Deque.previous = %p\n"
"-- Deque.next = %p\n"
"-- Timeout = 0x%016llx\n"
"-- Period = 0x%016llx\n"
"-- Callback = %p\n"
"-- Arg = %p\n"
"-- Options = 0x%02x\n",
timer,
timer->deque.previous,
timer->deque.next,
timer->timeout,
(unsigned long long)(timer->period),
timer->callback,
timer->arg,
timer->options);
}
static void
_dumpThread(FILE* stream, SsxThread* thread)
{
SsxThreadContext* threadCtx;
SsxThreadContextFullIrq* threadCtxIrq;
uint32_t srr[4], lr, sp;
fprintf(stream,
"-- Thread mapped at priority %d (%p)\n"
"-- Thread state = %s (%d)\n"
"-- Thread flags = %s (0x%02x)\n"
"-- Saved Stack Pointer = %p\n",
thread->priority, thread,
_threadState[thread->state], thread->state,
_threadFlags[thread->flags], thread->flags,
(void*)thread->saved_stack_pointer);
if (thread->flags & SSX_THREAD_FLAG_SEMAPHORE_PEND) {
fprintf(stream,
"-- Semaphore = %p\n",
(void*)thread->semaphore);
}
fprintf(stream,
"---------------------------------------------\n");
if (thread->flags & SSX_THREAD_FLAG_TIMER_PEND) {
_dumpTimer(stream, &(thread->timer));
fprintf(stream,
"---------------------------------------------\n");
}
if ((thread == ssx_current()) && !__ssx_kernel_context_any_interrupt()) {
fprintf(stream,
"-- This thread is executing ssx_dump()\n");
} else {
if (thread == ssx_current()) {
// This is the interrupted thread, and only has its volatile
// context saved. The thread stack pointer is stored in a global
// kernel variable.
if (__ssx_kernel_context_critical_interrupt()) {
SSX_PANIC(SSX_DUMP_UNIMPLEMENTED);
srr[0] = srr[1] = srr[2] = srr[3] = lr = sp = 0; /* For GCC */
} else {
threadCtxIrq =
(SsxThreadContextFullIrq*)__ssx_saved_sp_noncritical;
srr[0] = threadCtxIrq->srr0;
srr[1] = threadCtxIrq->srr1;
srr[2] = threadCtxIrq->srr2;
srr[3] = threadCtxIrq->srr3;
lr = threadCtxIrq->lr;
sp = threadCtxIrq->r1;
}
} else {
// This is a fully swapped-out thread. The context is saved in
// at the stored stack pointer.
threadCtx = (SsxThreadContext*)(thread->saved_stack_pointer);
srr[0] = threadCtx->srr0;
srr[1] = threadCtx->srr1;
srr[2] = threadCtx->srr2;
srr[3] = threadCtx->srr3;
lr = threadCtx->lr;
sp = ((uint32_t*)threadCtx->r1)[0];
}
fprintf(stream,
"-- SRR0: 0x%08x SRR1: 0x%08x "
"SRR2: 0x%08x SRR3: 0x%08x\n"
"-- LR: 0x%08x\n",
srr[0], srr[1], srr[2], srr[3],
lr);
fprintf(stream,
"---------------------------------------------\n");
// Unwind the stack
while (sp != 0) {
fprintf(stream,
"-- SP: 0x%08x *LR*:0x%08x\n",
sp, ((uint32_t*)sp)[1]);
sp = ((uint32_t*)sp)[0];
}
}
}
void
ssx_dump(FILE* stream, int options)
{
int i, sep;
SsxThread* thread;
fprintf(stream,
"------------------------------------------------------------\n");
fprintf(stream,
"-- SSX Kernel Dump @ 0x%016llx\n"
"-- USPRG0 = 0x%08x\n"
"-- __ssx_run_queue = 0x%08x\n",
ssx_timebase_get(),
mfspr(SPRN_USPRG0),
__ssx_run_queue);
fprintf(stream,
"------------------------------------------------------------\n");
sep = 0;
for (i = 0; i < SSX_THREADS; i++) {
ssx_thread_at_priority(i, &thread);
if (thread) {
if (sep) {
fprintf(stream,
"*********************************************\n");
}
_dumpThread(stream, thread);
sep = 1;
}
}
fprintf(stream,
"------------------------------------------------------------\n");
}
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