static void mali_mmu_activate_address_space(struct mali_mmu_core *mmu, u32 page_directory)
{
mali_mmu_enable_stall(mmu); /* this might fail, but changing the DTE address and ZAP should work anyway... */
mali_hw_core_register_write(&mmu->hw_core, MALI_MMU_REGISTER_DTE_ADDR, page_directory);
mali_hw_core_register_write(&mmu->hw_core, MALI_MMU_REGISTER_COMMAND, MALI_MMU_COMMAND_ZAP_CACHE);
mali_mmu_disable_stall(mmu);
}
_mali_osk_errcode_t mali_mmu_reset(struct mali_mmu_core *mmu)
{
_mali_osk_errcode_t err = _MALI_OSK_ERR_FAULT;
mali_bool stall_success;
MALI_DEBUG_ASSERT_POINTER(mmu);
/* The _if_ is neccessary when called from mali_mmu_create and NULL==group */
if (mmu->group)
{
MALI_ASSERT_GROUP_LOCKED(mmu->group);
}
stall_success = mali_mmu_enable_stall(mmu);
/* The stall can not fail in current hw-state */
MALI_DEBUG_ASSERT(stall_success);
MALI_DEBUG_PRINT(3, ("Mali MMU: mali_kernel_mmu_reset: %s\n", mmu->hw_core.description));
if (_MALI_OSK_ERR_OK == mali_mmu_raw_reset(mmu))
{
mali_hw_core_register_write(&mmu->hw_core, MALI_MMU_REGISTER_INT_MASK, MALI_MMU_INTERRUPT_PAGE_FAULT | MALI_MMU_INTERRUPT_READ_BUS_ERROR);
/* no session is active, so just activate the empty page directory */
mali_hw_core_register_write(&mmu->hw_core, MALI_MMU_REGISTER_DTE_ADDR, mali_empty_page_directory);
mali_mmu_enable_paging(mmu);
err = _MALI_OSK_ERR_OK;
}
mali_mmu_disable_stall(mmu);
return err;
}
_mali_osk_errcode_t mali_mmu_reset(struct mali_mmu_core *mmu)
{
_mali_osk_errcode_t err = _MALI_OSK_ERR_FAULT;
mali_bool stall_success;
MALI_DEBUG_ASSERT_POINTER(mmu);
stall_success = mali_mmu_enable_stall(mmu);
if (!stall_success)
{
err = _MALI_OSK_ERR_BUSY;
}
MALI_DEBUG_PRINT(3, ("Mali MMU: mali_kernel_mmu_reset: %s\n", mmu->hw_core.description));
if (_MALI_OSK_ERR_OK == mali_mmu_raw_reset(mmu))
{
mali_hw_core_register_write(&mmu->hw_core, MALI_MMU_REGISTER_INT_MASK, MALI_MMU_INTERRUPT_PAGE_FAULT | MALI_MMU_INTERRUPT_READ_BUS_ERROR);
/* no session is active, so just activate the empty page directory */
mali_hw_core_register_write(&mmu->hw_core, MALI_MMU_REGISTER_DTE_ADDR, mali_empty_page_directory);
mali_mmu_enable_paging(mmu);
err = _MALI_OSK_ERR_OK;
}
mali_mmu_disable_stall(mmu);
return err;
}
void mali_mmu_activate_fault_flush_page_directory(struct mali_mmu_core *mmu)
{
mali_bool stall_success;
MALI_DEBUG_ASSERT_POINTER(mmu);
MALI_DEBUG_PRINT(3, ("Activating the page fault flush page directory on MMU %s\n", mmu->hw_core.description));
stall_success = mali_mmu_enable_stall(mmu);
/* This function is expect to fail the stalling, since it might be in PageFault mode when it is called */
mali_mmu_activate_address_space(mmu, mali_page_fault_flush_page_directory);
if (MALI_TRUE == stall_success) mali_mmu_disable_stall(mmu);
}
void mali_mmu_activate_empty_page_directory(struct mali_mmu_core* mmu)
{
mali_bool stall_success;
MALI_DEBUG_ASSERT_POINTER(mmu);
MALI_ASSERT_GROUP_LOCKED(mmu->group);
MALI_DEBUG_PRINT(3, ("Activating the empty page directory on MMU %s\n", mmu->hw_core.description));
stall_success = mali_mmu_enable_stall(mmu);
/* This function can only be called when the core is idle, so it could not fail. */
MALI_DEBUG_ASSERT( stall_success );
mali_mmu_activate_address_space(mmu, mali_empty_page_directory);
mali_mmu_disable_stall(mmu);
}
void mali_mmu_activate_page_directory(struct mali_mmu_core *mmu, struct mali_page_directory *pagedir)
{
mali_bool stall_success;
MALI_DEBUG_ASSERT_POINTER(mmu);
MALI_DEBUG_PRINT(5, ("Asked to activate page directory 0x%x on MMU %s\n", pagedir, mmu->hw_core.description));
stall_success = mali_mmu_enable_stall(mmu);
MALI_DEBUG_ASSERT(stall_success);
MALI_IGNORE(stall_success);
mali_mmu_activate_address_space(mmu, pagedir->page_directory);
mali_mmu_disable_stall(mmu);
}
mali_bool mali_mmu_activate_page_directory(struct mali_mmu_core *mmu, struct mali_page_directory *pagedir)
{
mali_bool stall_success;
MALI_DEBUG_ASSERT_POINTER(mmu);
MALI_ASSERT_GROUP_LOCKED(mmu->group);
MALI_DEBUG_PRINT(5, ("Asked to activate page directory 0x%x on MMU %s\n", pagedir, mmu->hw_core.description));
stall_success = mali_mmu_enable_stall(mmu);
if ( MALI_FALSE==stall_success ) return MALI_FALSE;
mali_mmu_activate_address_space(mmu, pagedir->page_directory);
mali_mmu_disable_stall(mmu);
return MALI_TRUE;
}
mali_bool mali_mmu_zap_tlb(struct mali_mmu_core *mmu)
{
mali_bool stall_success = mali_mmu_enable_stall(mmu);
mali_hw_core_register_write(&mmu->hw_core, MALI_MMU_REGISTER_COMMAND, MALI_MMU_COMMAND_ZAP_CACHE);
if (MALI_FALSE == stall_success) {
/* False means that it is in Pagefault state. Not possible to disable_stall then */
return MALI_FALSE;
}
mali_mmu_disable_stall(mmu);
return MALI_TRUE;
}
void mali_mmu_zap_tlb(struct mali_mmu_core *mmu)
{
mali_mmu_enable_stall(mmu); /* this might fail */
mali_hw_core_register_write(&mmu->hw_core, MALI_MMU_REGISTER_COMMAND, MALI_MMU_COMMAND_ZAP_CACHE);
mali_mmu_disable_stall(mmu);
}
