void local_flush_tlb_all(void)
{
unsigned long flags;
unsigned long old_ctx;
int entry;
ENTER_CRITICAL(flags);
/* Save old context and create impossible VPN2 value */
old_ctx = read_c0_entryhi();
write_c0_entrylo0(0);
write_c0_entrylo1(0);
entry = read_c0_wired();
/* Blast 'em all away. */
while (entry < current_cpu_data.tlbsize) {
/* Make sure all entries differ. */
write_c0_entryhi(UNIQUE_ENTRYHI(entry));
write_c0_index(entry);
mtc0_tlbw_hazard();
tlb_write_indexed();
entry++;
}
tlbw_use_hazard();
write_c0_entryhi(old_ctx);
FLUSH_ITLB;
EXIT_CRITICAL(flags);
}
void
dump_tlb_wired(void)
{
int wired = r3k_have_wired_reg ? read_c0_wired() : 8;
printk("Wired: %d", wired);
dump_tlb(0, wired - 1);
}
static void ipu_del_wired_entry( void )
{
unsigned long flags;
unsigned long wired;
local_irq_save(flags);
wired = read_c0_wired();
if (wired) {
write_c0_wired(0);
}
local_irq_restore(flags);
}
static void ipu_add_wired_entry(unsigned long pid,
unsigned long entrylo0, unsigned long entrylo1,
unsigned long entryhi, unsigned long pagemask)
{
unsigned long flags;
unsigned long wired;
unsigned long old_pagemask;
unsigned long old_ctx;
struct task_struct *g, *p;
/* We will lock an 4MB page size entry to map the 4MB reserved IPU memory */
wired = read_c0_wired();
if (wired) return;
do_each_thread(g, p) {
if (p->pid == pid )
g_asid = p->mm->context[0];
} while_each_thread(g, p);
local_irq_save(flags);
entrylo0 = entrylo0 >> 6; /* PFN */
entrylo0 |= 0x6 | (0 << 3); /* Write-through cacheable, dirty, valid */
/* Save old context and create impossible VPN2 value */
old_ctx = read_c0_entryhi() & 0xff;
old_pagemask = read_c0_pagemask();
write_c0_wired(wired + 1);
write_c0_index(wired);
BARRIER;
entryhi &= ~0xff; /* new add, 20070906 */
entryhi |= g_asid; /* new add, 20070906 */
// entryhi |= old_ctx; /* new add, 20070906 */
write_c0_pagemask(pagemask);
write_c0_entryhi(entryhi);
write_c0_entrylo0(entrylo0);
write_c0_entrylo1(entrylo1);
BARRIER;
tlb_write_indexed();
BARRIER;
write_c0_entryhi(old_ctx);
BARRIER;
write_c0_pagemask(old_pagemask);
local_flush_tlb_all();
local_irq_restore(flags);
#if defined(DEBUG)
printk("\nold_ctx=%03d\n", old_ctx);
show_tlb();
#endif
}
static void kvm_mips_init_tlbs(struct kvm *kvm)
{
unsigned long wired;
/* Add a wired entry to the TLB, it is used to map the commpage to the Guest kernel */
wired = read_c0_wired();
write_c0_wired(wired + 1);
mtc0_tlbw_hazard();
kvm->arch.commpage_tlb = wired;
kvm_debug("[%d] commpage TLB: %d\n", smp_processor_id(),
kvm->arch.commpage_tlb);
}
void local_flush_tlb_all(void)
{
unsigned long flags;
unsigned long old_ctx;
int entry, ftlbhighset;
local_irq_save(flags);
/* Save old context and create impossible VPN2 value */
old_ctx = read_c0_entryhi();
htw_stop();
write_c0_entrylo0(0);
write_c0_entrylo1(0);
entry = read_c0_wired();
/*
* Blast 'em all away.
* If there are any wired entries, fall back to iterating
*/
if (cpu_has_tlbinv && !entry) {
if (current_cpu_data.tlbsizevtlb) {
write_c0_index(0);
mtc0_tlbw_hazard();
tlbinvf(); /* invalidate VTLB */
}
ftlbhighset = current_cpu_data.tlbsizevtlb +
current_cpu_data.tlbsizeftlbsets;
for (entry = current_cpu_data.tlbsizevtlb;
entry < ftlbhighset;
entry++) {
write_c0_index(entry);
mtc0_tlbw_hazard();
tlbinvf(); /* invalidate one FTLB set */
}
} else {
while (entry < current_cpu_data.tlbsize) {
/* Make sure all entries differ. */
write_c0_entryhi(UNIQUE_ENTRYHI(entry));
write_c0_index(entry);
mtc0_tlbw_hazard();
tlb_write_indexed();
entry++;
}
}
tlbw_use_hazard();
write_c0_entryhi(old_ctx);
htw_start();
flush_micro_tlb();
local_irq_restore(flags);
}
static void ipu_add_wired_entry(unsigned long pid,
unsigned long entrylo0, unsigned long entrylo1,
unsigned long entryhi, unsigned long pagemask)
{
unsigned long flags;
unsigned long wired;
unsigned long old_pagemask;
unsigned long old_ctx;
struct task_struct *g, *p;
do_each_thread(g, p) {
if (p->pid == pid )
g_asid = p->mm->context[0];
} while_each_thread(g, p);
local_irq_save(flags);
/* Save old context and create impossible VPN2 value */
old_ctx = read_c0_entryhi() & 0xff;
old_pagemask = read_c0_pagemask();
wired = read_c0_wired();
write_c0_wired(wired + 1);
write_c0_index(wired);
BARRIER;
entryhi &= ~0xff; /* new add, 20070906 */
entryhi |= g_asid; /* new add, 20070906 */
// entryhi |= old_ctx; /* new add, 20070906 */
write_c0_pagemask(pagemask);
write_c0_entryhi(entryhi);
write_c0_entrylo0(entrylo0);
write_c0_entrylo1(entrylo1);
BARRIER;
tlb_write_indexed();
BARRIER;
write_c0_entryhi(old_ctx);
BARRIER;
write_c0_pagemask(old_pagemask);
local_flush_tlb_all();
local_irq_restore(flags);
#if defined(DEBUG)
printk("\nold_ctx=%03d\n", old_ctx);
show_tlb();
#endif
}
void
dump_cp0(char *key)
{
if (key == NULL)
key = "";
print_cp0(key, 0, "INDEX ", read_c0_index());
print_cp0(key, 2, "ENTRYLO1", read_c0_entrylo0());
print_cp0(key, 3, "ENTRYLO2", read_c0_entrylo1());
print_cp0(key, 4, "CONTEXT ", read_c0_context());
print_cp0(key, 5, "PAGEMASK", read_c0_pagemask());
print_cp0(key, 6, "WIRED ", read_c0_wired());
//print_cp0(key, 8, "BADVADDR", read_c0_badvaddr());
print_cp0(key, 9, "COUNT ", read_c0_count());
print_cp0(key, 10, "ENTRYHI ", read_c0_entryhi());
print_cp0(key, 11, "COMPARE ", read_c0_compare());
print_cp0(key, 12, "STATUS ", read_c0_status());
print_cp0(key, 13, "CAUSE ", read_c0_cause() & 0xffff87ff);
print_cp0(key, 16, "CONFIG ", read_c0_config());
return;
}
static int add_wired_tlb_entry(uint32_t entrylo0, uint32_t entrylo1,
uint32_t entryhi, uint32_t pgsize)
{
uint32_t tlbindex;
tlbindex = read_c0_wired();
if (tlbindex >= get_tlb_size() || tlbindex >= C0_WIRED_MASK) {
printk(BIOS_ERR, "Ran out of TLB entries\n");
return -1;
}
write_c0_wired(tlbindex + 1);
write_c0_index(tlbindex);
write_c0_pagemask(((pgsize / MIN_PAGE_SIZE) - 1) << C0_PAGEMASK_SHIFT);
write_c0_entryhi(entryhi);
write_c0_entrylo0(entrylo0);
write_c0_entrylo1(entrylo1);
mtc0_tlbw_hazard();
tlb_write_indexed();
tlbw_use_hazard();
return 0;
}
void local_flush_tlb_all(void)
{
unsigned long flags, config6_flags;
unsigned long old_ctx;
int entry;
ENTER_CRITICAL(flags);
disable_pgwalker(config6_flags);
/* Save old context and create impossible VPN2 value */
old_ctx = read_c0_entryhi();
write_c0_entrylo0(0);
write_c0_entrylo1(0);
entry = read_c0_wired();
#if defined(CONFIG_MAPPED_KERNEL)
if (!entry) printk("[%s] flushing entry=%d in MAPPED_KERNEL mode!\n",
__FUNCTION__, entry);
#endif
/* Blast 'em all away. */
while (entry < current_cpu_data.tlbsize) {
/* Make sure all entries differ. */
#ifndef CONFIG_NLM_VMIPS
write_c0_entryhi(UNIQUE_ENTRYHI(entry));
#else
__write_64bit_c0_register($10, 0, (UNIQUE_VMIPS_ENTRYHI(entry)));
#endif
write_c0_index(entry);
mtc0_tlbw_hazard();
tlb_write_indexed();
entry++;
}
tlbw_use_hazard();
write_c0_entryhi(old_ctx);
FLUSH_ITLB;
enable_pgwalker(config6_flags);
EXIT_CRITICAL(flags);
}
/* TLB operations. */
void local_flush_tlb_all(void)
{
unsigned long flags;
unsigned long old_ctx;
int entry;
#ifdef DEBUG_TLB
printk("[tlball]");
#endif
local_irq_save(flags);
old_ctx = read_c0_entryhi() & ASID_MASK;
write_c0_entrylo0(0);
entry = r3k_have_wired_reg ? read_c0_wired() : 8;
for (; entry < current_cpu_data.tlbsize; entry++) {
write_c0_index(entry << 8);
write_c0_entryhi((entry | 0x80000) << 12);
BARRIER;
tlb_write_indexed();
}
write_c0_entryhi(old_ctx);
local_irq_restore(flags);
}
void local_flush_tlb_all(void)
{
unsigned long flags;
unsigned long old_ctx;
unsigned long entry;
local_irq_save(flags);
/* Save old context and create impossible VPN2 value */
old_ctx = read_c0_entryhi() & ASID_MASK;
write_c0_entryhi(CKSEG0);
write_c0_entrylo0(0);
write_c0_entrylo1(0);
entry = read_c0_wired();
/* Blast 'em all away. */
while (entry < NTLB_ENTRIES) {
write_c0_index(entry);
tlb_write_indexed();
entry++;
}
write_c0_entryhi(old_ctx);
local_irq_restore(flags);
}
void
dump_tlb_nonwired(void)
{
int wired = r3k_have_wired_reg ? read_c0_wired() : 8;
dump_tlb(wired, current_cpu_data.tlbsize - 1);
}