void X86CpuAddToTraceList(X86Cpu *self, struct x86_uop_t *uop) {
assert(x86_tracing());
assert(!uop->in_uop_trace_list);
uop->in_uop_trace_list = 1;
linked_list_add(self->uop_trace_list, uop);
}
void x86_uop_queue_recover(int core, int thread)
{
struct list_t *uop_queue = X86_THREAD.uop_queue;
struct x86_uop_t *uop;
while (list_count(uop_queue))
{
uop = list_get(uop_queue, list_count(uop_queue) - 1);
assert(uop->thread == thread);
if (!uop->specmode)
break;
list_remove_at(uop_queue, list_count(uop_queue) - 1);
uop->in_uop_queue = 0;
/* Trace */
if (x86_tracing())
{
x86_trace("x86.inst id=%lld core=%d stg=\"sq\"\n",
uop->id_in_core, uop->core);
x86_cpu_uop_trace_list_add(uop);
}
/* Free */
x86_uop_free_if_not_queued(uop);
}
}
void X86ThreadRecoverFetchQueue(X86Thread *self)
{
X86Core *core = self->core;
X86Cpu *cpu = self->cpu;
struct list_t *fetchq = self->fetch_queue;
struct x86_uop_t *uop;
while (list_count(fetchq))
{
uop = list_get(fetchq, list_count(fetchq) - 1);
assert(uop->thread == self);
if (!uop->specmode)
break;
uop = X86ThreadRemoveFromFetchQueue(self, list_count(fetchq) - 1);
/* Trace */
if (x86_tracing())
{
x86_trace("x86.inst id=%lld core=%d stg=\"sq\"\n",
uop->id_in_core, core->id);
X86CpuAddToTraceList(cpu, uop);
}
/* Free */
x86_uop_free_if_not_queued(uop);
}
}
void x86_cpu_recover(int core, int thread)
{
struct x86_uop_t *uop;
/* Remove instructions of this thread in fetch_queue, uop_queue, iq, sq, lq and event_queue. */
x86_fetch_queue_recover(core, thread);
x86_uop_queue_recover(core, thread);
x86_iq_recover(core, thread);
x86_lsq_recover(core, thread);
x86_event_queue_recover(core, thread);
/* Remove instructions from ROB, restoring the state of the
* physical register file. */
for (;;)
{
/* Get instruction */
uop = x86_rob_tail(core, thread);
if (!uop)
break;
/* If we already removed all speculative instructions,
* the work is finished */
assert(uop->core == core);
assert(uop->thread == thread);
if (!uop->specmode)
break;
/* Statistics */
if (uop->fetch_trace_cache)
X86_THREAD.trace_cache->squashed++;
X86_THREAD.squashed++;
X86_CORE.squashed++;
x86_cpu->squashed++;
/* Undo map */
if (!uop->completed)
x86_reg_file_write(uop);
x86_reg_file_undo(uop);
/* Trace */
if (x86_tracing())
{
x86_trace("x86.inst id=%lld core=%d stg=\"sq\"\n",
uop->id_in_core, uop->core);
x86_cpu_uop_trace_list_add(uop);
}
/* Remove entry in ROB */
x86_rob_remove_tail(core, thread);
}
/* If we actually fetched wrong instructions, recover kernel */
if (x86_ctx_get_status(X86_THREAD.ctx, x86_ctx_spec_mode))
x86_ctx_recover(X86_THREAD.ctx);
/* Stall fetch and set eip to fetch. */
X86_THREAD.fetch_stall_until = MAX(X86_THREAD.fetch_stall_until, x86_cpu->cycle + x86_cpu_recover_penalty - 1);
X86_THREAD.fetch_neip = X86_THREAD.ctx->regs->eip;
}
void x86_cpu_uop_trace_list_add(struct x86_uop_t *uop)
{
assert(x86_tracing());
assert(!uop->in_uop_trace_list);
uop->in_uop_trace_list = 1;
linked_list_add(x86_cpu->uop_trace_list, uop);
}
/* Run the emulation of one x86 macro-instruction and create its uops.
* If any of the uops is a control uop, this uop will be the return value of
* the function. Otherwise, the first decoded uop is returned. */
static struct x86_uop_t *X86ThreadFetchInst(X86Thread *self,
int fetch_trace_cache) {
X86Cpu *cpu = self->cpu;
X86Core *core = self->core;
X86Context *ctx = self->ctx;
struct x86_uop_t *uop;
struct x86_uop_t *ret_uop;
struct x86_uinst_t *uinst;
int uinst_count;
int uinst_index;
/* Functional simulation */
self->fetch_eip = self->fetch_neip;
X86ContextSetEip(ctx, self->fetch_eip);
X86ContextExecute(ctx);
self->fetch_neip = self->fetch_eip + ctx->inst.size;
/* If no micro-instruction was generated by this instruction, create a
* 'nop' micro-instruction. This makes sure that there is always a micro-
* instruction representing the regular control flow of macro-instructions
* of the program. It is important for the traces stored in the trace
* cache. */
if (!x86_uinst_list->count)
x86_uinst_new(ctx, x86_uinst_nop, 0, 0, 0, 0, 0, 0, 0);
/* Micro-instructions created by the x86 instructions can be found now
* in 'x86_uinst_list'. */
uinst_count = list_count(x86_uinst_list);
uinst_index = 0;
ret_uop = NULL;
while (list_count(x86_uinst_list)) {
/* Get uinst from head of list */
uinst = list_remove_at(x86_uinst_list, 0);
/* Create uop */
uop = x86_uop_create();
uop->uinst = uinst;
assert(uinst->opcode >= 0 && uinst->opcode < x86_uinst_opcode_count);
uop->flags = x86_uinst_info[uinst->opcode].flags;
uop->id = cpu->uop_id_counter++;
uop->id_in_core = core->uop_id_counter++;
uop->ctx = ctx;
uop->thread = self;
uop->mop_count = uinst_count;
uop->mop_size = ctx->inst.size;
uop->mop_id = uop->id - uinst_index;
uop->mop_index = uinst_index;
uop->eip = self->fetch_eip;
uop->in_fetch_queue = 1;
uop->trace_cache = fetch_trace_cache;
uop->specmode = X86ContextGetState(ctx, X86ContextSpecMode);
uop->fetch_address = self->fetch_address;
uop->fetch_access = self->fetch_access;
uop->neip = ctx->regs->eip;
uop->pred_neip = self->fetch_neip;
uop->target_neip = ctx->target_eip;
/* Process uop dependences and classify them in integer, floating-point,
* flags, etc. */
x86_uop_count_deps(uop);
/* Calculate physical address of a memory access */
if (uop->flags & X86_UINST_MEM) {
if (uinst->address == ctx->mem_mod_low && ctx->mem_mod_low!=0)
{ //fprintf(stderr, "%x, low\n", uinst->address);
ctx->mem_low = uop->data-(uop->data & (self->data_mod->block_size-1));
uop->addr = uinst->address;
}
else if (uinst->address == ctx->mem_mod_high && ctx->mem_mod_high!=0 )
{ //fprintf(stderr, "%x, high\n", uinst->address);
ctx->mem_high = uop->data | (self->data_mod->block_size-1);
uop->addr = uinst->address;
}
else if (!FPGARegCheck(ctx, uop, uinst->address)) {
if (self->standalone) {
uop->phy_addr = uinst->address;
uop->addr = uinst->address;
mem_read_copy(ctx->mem, uop->addr, 4, &(uop->data));
} else {
uop->phy_addr = mmu_translate(
self->ctx->address_space_index, uinst->address);
uop->addr = uinst->address;
mem_read_copy(ctx->mem, uop->addr, 4, &(uop->data));
}
}
}
/* Trace */
if (x86_tracing()) {
char str[MAX_STRING_SIZE];
char inst_name[MAX_STRING_SIZE];
char uinst_name[MAX_STRING_SIZE];
char *str_ptr;
int str_size;
str_ptr = str;
str_size = sizeof str;
/* Command */
str_printf(&str_ptr, &str_size, "x86.new_inst id=%lld core=%d",
uop->id_in_core, core->id);
/* Speculative mode */
if (uop->specmode)
str_printf(&str_ptr, &str_size, " spec=\"t\"");
/* Macro-instruction name */
if (!uinst_index) {
x86_inst_dump_buf(&ctx->inst, inst_name, sizeof inst_name);
str_printf(&str_ptr, &str_size, " asm=\"%s\"", inst_name);
}
/* Rest */
x86_uinst_dump_buf(uinst, uinst_name, sizeof uinst_name);
str_printf(&str_ptr, &str_size, " uasm=\"%s\" stg=\"fe\"",
uinst_name);
/* Dump */
x86_trace("%s\n", str);
}
/* Select as returned uop */
if (!ret_uop || (uop->flags & X86_UINST_CTRL))
ret_uop = uop;
/* Insert into fetch queue */
list_add(self->fetch_queue, uop);
if (fetch_trace_cache)
self->trace_cache_queue_occ++;
/* Statistics */
cpu->num_fetched_uinst++;
self->num_fetched_uinst++;
if (fetch_trace_cache)
self->trace_cache->num_fetched_uinst++;
/* Next uinst */
uinst_index++;
}
/* Increase fetch queue occupancy if instruction does not come from
* trace cache, and return. */
if (ret_uop && !fetch_trace_cache)
self->fetchq_occ += ret_uop->mop_size;
return ret_uop;
}
void X86ThreadRecover(X86Thread *self)
{
X86Cpu *cpu = self->cpu;
X86Core *core = self->core;
struct x86_uop_t *uop;
/* Remove instructions of this thread in fetch queue, uop queue,
* instruction queue, store queue, load queue, and event queue. */
X86ThreadRecoverFetchQueue(self);
X86ThreadRecoverUopQueue(self);
X86ThreadRecoverIQ(self);
X86ThreadRecoverLSQ(self);
X86ThreadRecoverEventQueue(self);
/* Remove instructions from ROB, restoring the state of the
* physical register file. */
for (;;)
{
/* Get instruction */
uop = X86ThreadGetROBTail(self);
if (!uop)
break;
/* If we already removed all speculative instructions,
* the work is finished */
assert(uop->thread == self);
if (!uop->specmode)
break;
/* Statistics */
if (uop->trace_cache)
self->trace_cache->num_squashed_uinst++;
self->num_squashed_uinst++;
core->num_squashed_uinst++;
cpu->num_squashed_uinst++;
/* Undo map */
if (!uop->completed)
X86ThreadWriteUop(self, uop);
X86ThreadUndoUop(self, uop);
/* Trace */
if (x86_tracing())
{
x86_trace("x86.inst id=%lld core=%d stg=\"sq\"\n",
uop->id_in_core, core->id);
x86_cpu_uop_trace_list_add(uop);
}
/* Remove entry in ROB */
X86ThreadRemoveROBTail(self);
}
/* Check state of fetch stage and mapped context, if still any */
if (self->ctx)
{
/* If we actually fetched wrong instructions, recover emulator */
if (X86ContextGetState(self->ctx, X86ContextSpecMode))
X86ContextRecover(self->ctx);
/* Stall fetch and set eip to fetch. */
self->fetch_stall_until = MAX(self->fetch_stall_until,
asTiming(x86_cpu)->cycle + x86_cpu_recover_penalty - 1);
self->fetch_neip = self->ctx->regs->eip;
}
}
