diff options
Diffstat (limited to 'drivers/media/video/samsung/mali/common/mali_mmu.c')
| -rw-r--r-- | drivers/media/video/samsung/mali/common/mali_mmu.c | 619 |
1 files changed, 0 insertions, 619 deletions
diff --git a/drivers/media/video/samsung/mali/common/mali_mmu.c b/drivers/media/video/samsung/mali/common/mali_mmu.c deleted file mode 100644 index 2f2fa4d..0000000 --- a/drivers/media/video/samsung/mali/common/mali_mmu.c +++ /dev/null @@ -1,619 +0,0 @@ -/* - * Copyright (C) 2010-2012 ARM Limited. All rights reserved. - * - * This program is free software and is provided to you under the terms of the GNU General Public License version 2 - * as published by the Free Software Foundation, and any use by you of this program is subject to the terms of such GNU licence. - * - * A copy of the licence is included with the program, and can also be obtained from Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. - */ - -#include "mali_kernel_common.h" -#include "mali_osk.h" -#include "mali_osk_bitops.h" -#include "mali_osk_list.h" -#include "mali_ukk.h" - -#include "mali_mmu.h" -#include "mali_hw_core.h" -#include "mali_group.h" -#include "mali_mmu_page_directory.h" - -/** - * Size of the MMU registers in bytes - */ -#define MALI_MMU_REGISTERS_SIZE 0x24 - -/** - * MMU register numbers - * Used in the register read/write routines. - * See the hardware documentation for more information about each register - */ -typedef enum mali_mmu_register { - MALI_MMU_REGISTER_DTE_ADDR = 0x0000, /**< Current Page Directory Pointer */ - MALI_MMU_REGISTER_STATUS = 0x0004, /**< Status of the MMU */ - MALI_MMU_REGISTER_COMMAND = 0x0008, /**< Command register, used to control the MMU */ - MALI_MMU_REGISTER_PAGE_FAULT_ADDR = 0x000C, /**< Logical address of the last page fault */ - MALI_MMU_REGISTER_ZAP_ONE_LINE = 0x010, /**< Used to invalidate the mapping of a single page from the MMU */ - MALI_MMU_REGISTER_INT_RAWSTAT = 0x0014, /**< Raw interrupt status, all interrupts visible */ - MALI_MMU_REGISTER_INT_CLEAR = 0x0018, /**< Indicate to the MMU that the interrupt has been received */ - MALI_MMU_REGISTER_INT_MASK = 0x001C, /**< Enable/disable types of interrupts */ - MALI_MMU_REGISTER_INT_STATUS = 0x0020 /**< Interrupt status based on the mask */ -} mali_mmu_register; - -/** - * MMU interrupt register bits - * Each cause of the interrupt is reported - * through the (raw) interrupt status registers. - * Multiple interrupts can be pending, so multiple bits - * can be set at once. - */ -typedef enum mali_mmu_interrupt -{ - MALI_MMU_INTERRUPT_PAGE_FAULT = 0x01, /**< A page fault occured */ - MALI_MMU_INTERRUPT_READ_BUS_ERROR = 0x02 /**< A bus read error occured */ -} mali_mmu_interrupt; - -/** - * MMU commands - * These are the commands that can be sent - * to the MMU unit. - */ -typedef enum mali_mmu_command -{ - MALI_MMU_COMMAND_ENABLE_PAGING = 0x00, /**< Enable paging (memory translation) */ - MALI_MMU_COMMAND_DISABLE_PAGING = 0x01, /**< Disable paging (memory translation) */ - MALI_MMU_COMMAND_ENABLE_STALL = 0x02, /**< Enable stall on page fault */ - MALI_MMU_COMMAND_DISABLE_STALL = 0x03, /**< Disable stall on page fault */ - MALI_MMU_COMMAND_ZAP_CACHE = 0x04, /**< Zap the entire page table cache */ - MALI_MMU_COMMAND_PAGE_FAULT_DONE = 0x05, /**< Page fault processed */ - MALI_MMU_COMMAND_HARD_RESET = 0x06 /**< Reset the MMU back to power-on settings */ -} mali_mmu_command; - -typedef enum mali_mmu_status_bits -{ - MALI_MMU_STATUS_BIT_PAGING_ENABLED = 1 << 0, - MALI_MMU_STATUS_BIT_PAGE_FAULT_ACTIVE = 1 << 1, - MALI_MMU_STATUS_BIT_STALL_ACTIVE = 1 << 2, - MALI_MMU_STATUS_BIT_IDLE = 1 << 3, - MALI_MMU_STATUS_BIT_REPLAY_BUFFER_EMPTY = 1 << 4, - MALI_MMU_STATUS_BIT_PAGE_FAULT_IS_WRITE = 1 << 5, -} mali_mmu_status_bits; - -/** - * Definition of the MMU struct - * Used to track a MMU unit in the system. - * Contains information about the mapping of the registers - */ -struct mali_mmu_core -{ - struct mali_hw_core hw_core; /**< Common for all HW cores */ - struct mali_group *group; /**< Parent core group */ - _mali_osk_irq_t *irq; /**< IRQ handler */ -}; - -/** - * The MMU interrupt handler - * Upper half of the MMU interrupt processing. - * Called by the kernel when the MMU has triggered an interrupt. - * The interrupt function supports IRQ sharing. So it'll probe the MMU in question - * @param irq The irq number (not used) - * @param dev_id Points to the MMU object being handled - * @param regs Registers of interrupted process (not used) - * @return Standard Linux interrupt result. - * Subset used by the driver is IRQ_HANDLED processed - * IRQ_NONE Not processed - */ -static _mali_osk_errcode_t mali_mmu_upper_half(void * data); - -/** - * The MMU reset hander - * Bottom half of the MMU interrupt processing for page faults and bus errors - * @param work The item to operate on, NULL in our case - */ -static void mali_mmu_bottom_half(void *data); - -static void mali_mmu_probe_trigger(void *data); -static _mali_osk_errcode_t mali_mmu_probe_ack(void *data); - -MALI_STATIC_INLINE _mali_osk_errcode_t mali_mmu_raw_reset(struct mali_mmu_core *mmu); - -/* page fault queue flush helper pages - * note that the mapping pointers are currently unused outside of the initialization functions */ -static u32 mali_page_fault_flush_page_directory = MALI_INVALID_PAGE; -static u32 mali_page_fault_flush_page_table = MALI_INVALID_PAGE; -static u32 mali_page_fault_flush_data_page = MALI_INVALID_PAGE; - -/* an empty page directory (no address valid) which is active on any MMU not currently marked as in use */ -static u32 mali_empty_page_directory = MALI_INVALID_PAGE; - -_mali_osk_errcode_t mali_mmu_initialize(void) -{ - /* allocate the helper pages */ - mali_empty_page_directory = mali_allocate_empty_page(); - if(0 == mali_empty_page_directory) - { - mali_empty_page_directory = MALI_INVALID_PAGE; - return _MALI_OSK_ERR_NOMEM; - } - - if (_MALI_OSK_ERR_OK != mali_create_fault_flush_pages(&mali_page_fault_flush_page_directory, - &mali_page_fault_flush_page_table, &mali_page_fault_flush_data_page)) - { - mali_free_empty_page(mali_empty_page_directory); - return _MALI_OSK_ERR_FAULT; - } - - return _MALI_OSK_ERR_OK; -} - -void mali_mmu_terminate(void) -{ - MALI_DEBUG_PRINT(3, ("Mali MMU: terminating\n")); - - /* Free global helper pages */ - mali_free_empty_page(mali_empty_page_directory); - - /* Free the page fault flush pages */ - mali_destroy_fault_flush_pages(&mali_page_fault_flush_page_directory, - &mali_page_fault_flush_page_table, &mali_page_fault_flush_data_page); -} - -struct mali_mmu_core *mali_mmu_create(_mali_osk_resource_t *resource) -{ - struct mali_mmu_core* mmu = NULL; - - MALI_DEBUG_ASSERT_POINTER(resource); - - MALI_DEBUG_PRINT(2, ("Mali MMU: Creating Mali MMU: %s\n", resource->description)); - - mmu = _mali_osk_calloc(1,sizeof(struct mali_mmu_core)); - if (NULL != mmu) - { - if (_MALI_OSK_ERR_OK == mali_hw_core_create(&mmu->hw_core, resource, MALI_MMU_REGISTERS_SIZE)) - { - if (_MALI_OSK_ERR_OK == mali_mmu_reset(mmu)) - { - /* Setup IRQ handlers (which will do IRQ probing if needed) */ - mmu->irq = _mali_osk_irq_init(resource->irq, - mali_mmu_upper_half, - mali_mmu_bottom_half, - mali_mmu_probe_trigger, - mali_mmu_probe_ack, - mmu, - "mali_mmu_irq_handlers"); - if (NULL != mmu->irq) - { - return mmu; - } - else - { - MALI_PRINT_ERROR(("Failed to setup interrupt handlers for MMU %s\n", mmu->hw_core.description)); - } - } - mali_hw_core_delete(&mmu->hw_core); - } - - _mali_osk_free(mmu); - } - else - { - MALI_PRINT_ERROR(("Failed to allocate memory for MMU\n")); - } - - return NULL; -} - -void mali_mmu_delete(struct mali_mmu_core *mmu) -{ - _mali_osk_irq_term(mmu->irq); - mali_hw_core_delete(&mmu->hw_core); - _mali_osk_free(mmu); -} - -void mali_mmu_set_group(struct mali_mmu_core *mmu, struct mali_group *group) -{ - mmu->group = group; -} - -static void mali_mmu_enable_paging(struct mali_mmu_core *mmu) -{ - const int max_loop_count = 100; - const int delay_in_usecs = 1; - int i; - - mali_hw_core_register_write(&mmu->hw_core, MALI_MMU_REGISTER_COMMAND, MALI_MMU_COMMAND_ENABLE_PAGING); - - for (i = 0; i < max_loop_count; ++i) - { - if (mali_hw_core_register_read(&mmu->hw_core, MALI_MMU_REGISTER_STATUS) & MALI_MMU_STATUS_BIT_PAGING_ENABLED) - { - break; - } - _mali_osk_time_ubusydelay(delay_in_usecs); - } - if (max_loop_count == i) - { - MALI_PRINT_ERROR(("Enable paging request failed, MMU status is 0x%08X\n", mali_hw_core_register_read(&mmu->hw_core, MALI_MMU_REGISTER_STATUS))); - } -} - -mali_bool mali_mmu_enable_stall(struct mali_mmu_core *mmu) -{ - const int max_loop_count = 100; - const int delay_in_usecs = 999; - int i; - u32 mmu_status; - - /* There are no group when it is called from mali_mmu_create */ - if ( mmu->group ) MALI_ASSERT_GROUP_LOCKED(mmu->group); - - mmu_status = mali_hw_core_register_read(&mmu->hw_core, MALI_MMU_REGISTER_STATUS); - - if ( 0 == (mmu_status & MALI_MMU_STATUS_BIT_PAGING_ENABLED) ) - { - MALI_DEBUG_PRINT(4, ("MMU stall is implicit when Paging is not enebled.\n")); - return MALI_TRUE; - } - - if ( mmu_status & MALI_MMU_STATUS_BIT_PAGE_FAULT_ACTIVE ) - { - MALI_DEBUG_PRINT(3, ("Aborting MMU stall request since it is in pagefault state.\n")); - return MALI_FALSE; - } - - mali_hw_core_register_write(&mmu->hw_core, MALI_MMU_REGISTER_COMMAND, MALI_MMU_COMMAND_ENABLE_STALL); - - for (i = 0; i < max_loop_count; ++i) - { - mmu_status = mali_hw_core_register_read(&mmu->hw_core, MALI_MMU_REGISTER_STATUS); - if ( mmu_status & (MALI_MMU_STATUS_BIT_STALL_ACTIVE|MALI_MMU_STATUS_BIT_PAGE_FAULT_ACTIVE)) - { - break; - } - if ( 0 == (mmu_status & ( MALI_MMU_STATUS_BIT_PAGING_ENABLED ))) - { - break; - } - _mali_osk_time_ubusydelay(delay_in_usecs); - } - if (max_loop_count == i) - { - MALI_PRINT_ERROR(("Enable stall request failed, MMU status is 0x%08X\n", mali_hw_core_register_read(&mmu->hw_core, MALI_MMU_REGISTER_STATUS))); - return MALI_FALSE; - } - - if ( mmu_status & MALI_MMU_STATUS_BIT_PAGE_FAULT_ACTIVE ) - { - MALI_DEBUG_PRINT(3, ("Aborting MMU stall request since it has a pagefault.\n")); - return MALI_FALSE; - } - - return MALI_TRUE; -} - -void mali_mmu_disable_stall(struct mali_mmu_core *mmu) -{ - const int max_loop_count = 100; - const int delay_in_usecs = 1; - int i; - u32 mmu_status; - /* There are no group when it is called from mali_mmu_create */ - if ( mmu->group ) MALI_ASSERT_GROUP_LOCKED(mmu->group); - - mmu_status = mali_hw_core_register_read(&mmu->hw_core, MALI_MMU_REGISTER_STATUS); - - if ( 0 == (mmu_status & MALI_MMU_STATUS_BIT_PAGING_ENABLED )) - { - MALI_DEBUG_PRINT(3, ("MMU disable skipped since it was not enabled.\n")); - return; - } - if (mmu_status & MALI_MMU_STATUS_BIT_PAGE_FAULT_ACTIVE) - { - MALI_DEBUG_PRINT(2, ("Aborting MMU disable stall request since it is in pagefault state.\n")); - return; - } - - mali_hw_core_register_write(&mmu->hw_core, MALI_MMU_REGISTER_COMMAND, MALI_MMU_COMMAND_DISABLE_STALL); - - for (i = 0; i < max_loop_count; ++i) - { - u32 status = mali_hw_core_register_read(&mmu->hw_core, MALI_MMU_REGISTER_STATUS); - if ( 0 == (status & MALI_MMU_STATUS_BIT_STALL_ACTIVE) ) - { - break; - } - if ( status & MALI_MMU_STATUS_BIT_PAGE_FAULT_ACTIVE ) - { - break; - } - if ( 0 == (mmu_status & MALI_MMU_STATUS_BIT_PAGING_ENABLED )) - { - break; - } - _mali_osk_time_ubusydelay(delay_in_usecs); - } - if (max_loop_count == i) MALI_DEBUG_PRINT(1,("Disable stall request failed, MMU status is 0x%08X\n", mali_hw_core_register_read(&mmu->hw_core, MALI_MMU_REGISTER_STATUS))); -} - -void mali_mmu_page_fault_done(struct mali_mmu_core *mmu) -{ - MALI_ASSERT_GROUP_LOCKED(mmu->group); - MALI_DEBUG_PRINT(4, ("Mali MMU: %s: Leaving page fault mode\n", mmu->hw_core.description)); - mali_hw_core_register_write(&mmu->hw_core, MALI_MMU_REGISTER_COMMAND, MALI_MMU_COMMAND_PAGE_FAULT_DONE); -} - -MALI_STATIC_INLINE _mali_osk_errcode_t mali_mmu_raw_reset(struct mali_mmu_core *mmu) -{ - const int max_loop_count = 100; - const int delay_in_usecs = 1; - int i; - /* The _if_ is neccessary when called from mali_mmu_create and NULL==group */ - if (mmu->group)MALI_ASSERT_GROUP_LOCKED(mmu->group); - - mali_hw_core_register_write(&mmu->hw_core, MALI_MMU_REGISTER_DTE_ADDR, 0xCAFEBABE); - mali_hw_core_register_write(&mmu->hw_core, MALI_MMU_REGISTER_COMMAND, MALI_MMU_COMMAND_HARD_RESET); - - for (i = 0; i < max_loop_count; ++i) - { - if (mali_hw_core_register_read(&mmu->hw_core, MALI_MMU_REGISTER_DTE_ADDR) == 0) - { - break; - } - _mali_osk_time_ubusydelay(delay_in_usecs); - } - if (max_loop_count == i) - { - MALI_PRINT_ERROR(("Reset request failed, MMU status is 0x%08X\n", mali_hw_core_register_read(&mmu->hw_core, MALI_MMU_REGISTER_STATUS))); - return _MALI_OSK_ERR_FAULT; - } - - return _MALI_OSK_ERR_OK; -} - -_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; -} - - -/* ------------- interrupt handling below ------------------ */ - -static _mali_osk_errcode_t mali_mmu_upper_half(void * data) -{ - struct mali_mmu_core *mmu = (struct mali_mmu_core *)data; - u32 int_stat; - - MALI_DEBUG_ASSERT_POINTER(mmu); - - /* Check if it was our device which caused the interrupt (we could be sharing the IRQ line) */ - int_stat = mali_hw_core_register_read(&mmu->hw_core, MALI_MMU_REGISTER_INT_STATUS); - if (0 != int_stat) - { - mali_hw_core_register_write(&mmu->hw_core, MALI_MMU_REGISTER_INT_MASK, 0); - mali_hw_core_register_read(&mmu->hw_core, MALI_MMU_REGISTER_STATUS); - - if (int_stat & MALI_MMU_INTERRUPT_PAGE_FAULT) - { - _mali_osk_irq_schedulework(mmu->irq); - } - - if (int_stat & MALI_MMU_INTERRUPT_READ_BUS_ERROR) - { - /* clear interrupt flag */ - mali_hw_core_register_write(&mmu->hw_core, MALI_MMU_REGISTER_INT_CLEAR, MALI_MMU_INTERRUPT_READ_BUS_ERROR); - /* reenable it */ - mali_hw_core_register_write(&mmu->hw_core, MALI_MMU_REGISTER_INT_MASK, - mali_hw_core_register_read(&mmu->hw_core, MALI_MMU_REGISTER_INT_MASK) | MALI_MMU_INTERRUPT_READ_BUS_ERROR); - MALI_PRINT_ERROR(("Mali MMU: Read bus error\n")); - } - return _MALI_OSK_ERR_OK; - } - - return _MALI_OSK_ERR_FAULT; -} - -static void mali_mmu_bottom_half(void * data) -{ - struct mali_mmu_core *mmu = (struct mali_mmu_core*)data; - u32 raw, status, fault_address; - - MALI_DEBUG_ASSERT_POINTER(mmu); - - MALI_DEBUG_PRINT(3, ("Mali MMU: Page fault bottom half: Locking subsystems\n")); - - mali_group_lock(mmu->group); /* Unlocked in mali_group_bottom_half */ - - if ( MALI_FALSE == mali_group_power_is_on(mmu->group) ) - { - MALI_PRINT_ERROR(("Interrupt bottom half of %s when core is OFF.",mmu->hw_core.description)); - mali_group_unlock(mmu->group); - return; - } - - raw = mali_hw_core_register_read(&mmu->hw_core, MALI_MMU_REGISTER_INT_RAWSTAT); - status = mali_hw_core_register_read(&mmu->hw_core, MALI_MMU_REGISTER_STATUS); - - if ( (0==(raw & MALI_MMU_INTERRUPT_PAGE_FAULT)) && (0==(status & MALI_MMU_STATUS_BIT_PAGE_FAULT_ACTIVE)) ) - { - MALI_DEBUG_PRINT(2, ("Mali MMU: Page fault bottom half: No Irq found.\n")); - mali_group_unlock(mmu->group); - /* MALI_DEBUG_ASSERT(0); */ - return; - } - - /* An actual page fault has occurred. */ - - fault_address = mali_hw_core_register_read(&mmu->hw_core, MALI_MMU_REGISTER_PAGE_FAULT_ADDR); - - MALI_DEBUG_PRINT(2,("Mali MMU: Page fault detected at 0x%x from bus id %d of type %s on %s\n", - (void*)fault_address, - (status >> 6) & 0x1F, - (status & 32) ? "write" : "read", - mmu->hw_core.description)); - - mali_group_bottom_half(mmu->group, GROUP_EVENT_MMU_PAGE_FAULT); /* Unlocks the group lock */ -} - -mali_bool mali_mmu_zap_tlb(struct mali_mmu_core *mmu) -{ - mali_bool stall_success; - MALI_ASSERT_GROUP_LOCKED(mmu->group); - - 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_without_stall(struct mali_mmu_core *mmu) -{ - MALI_ASSERT_GROUP_LOCKED(mmu->group); - mali_hw_core_register_write(&mmu->hw_core, MALI_MMU_REGISTER_COMMAND, MALI_MMU_COMMAND_ZAP_CACHE); -} - - -void mali_mmu_invalidate_page(struct mali_mmu_core *mmu, u32 mali_address) -{ - MALI_ASSERT_GROUP_LOCKED(mmu->group); - mali_hw_core_register_write(&mmu->hw_core, MALI_MMU_REGISTER_ZAP_ONE_LINE, MALI_MMU_PDE_ENTRY(mali_address)); -} - -static void mali_mmu_activate_address_space(struct mali_mmu_core *mmu, u32 page_directory) -{ - MALI_ASSERT_GROUP_LOCKED(mmu->group); - /* The MMU must be in stalled or page fault mode, for this writing to work */ - MALI_DEBUG_ASSERT( 0 != ( mali_hw_core_register_read(&mmu->hw_core, MALI_MMU_REGISTER_STATUS) - & (MALI_MMU_STATUS_BIT_STALL_ACTIVE|MALI_MMU_STATUS_BIT_PAGE_FAULT_ACTIVE) ) ); - 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_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; -} - -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_fault_flush_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 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); -} - -/* Is called when we want the mmu to give an interrupt */ -static void mali_mmu_probe_trigger(void *data) -{ - struct mali_mmu_core *mmu = (struct mali_mmu_core *)data; - mali_hw_core_register_write(&mmu->hw_core, MALI_MMU_REGISTER_INT_RAWSTAT, MALI_MMU_INTERRUPT_PAGE_FAULT|MALI_MMU_INTERRUPT_READ_BUS_ERROR); -} - -/* Is called when the irq probe wants the mmu to acknowledge an interrupt from the hw */ -static _mali_osk_errcode_t mali_mmu_probe_ack(void *data) -{ - struct mali_mmu_core *mmu = (struct mali_mmu_core *)data; - u32 int_stat; - - int_stat = mali_hw_core_register_read(&mmu->hw_core, MALI_MMU_REGISTER_INT_STATUS); - - MALI_DEBUG_PRINT(2, ("mali_mmu_probe_irq_acknowledge: intstat 0x%x\n", int_stat)); - if (int_stat & MALI_MMU_INTERRUPT_PAGE_FAULT) - { - MALI_DEBUG_PRINT(2, ("Probe: Page fault detect: PASSED\n")); - mali_hw_core_register_write(&mmu->hw_core, MALI_MMU_REGISTER_INT_CLEAR, MALI_MMU_INTERRUPT_PAGE_FAULT); - } - else - { - MALI_DEBUG_PRINT(1, ("Probe: Page fault detect: FAILED\n")); - } - - if (int_stat & MALI_MMU_INTERRUPT_READ_BUS_ERROR) - { - MALI_DEBUG_PRINT(2, ("Probe: Bus read error detect: PASSED\n")); - mali_hw_core_register_write(&mmu->hw_core, MALI_MMU_REGISTER_INT_CLEAR, MALI_MMU_INTERRUPT_READ_BUS_ERROR); - } - else - { - MALI_DEBUG_PRINT(1, ("Probe: Bus read error detect: FAILED\n")); - } - - if ( (int_stat & (MALI_MMU_INTERRUPT_PAGE_FAULT|MALI_MMU_INTERRUPT_READ_BUS_ERROR)) == - (MALI_MMU_INTERRUPT_PAGE_FAULT|MALI_MMU_INTERRUPT_READ_BUS_ERROR)) - { - return _MALI_OSK_ERR_OK; - } - - return _MALI_OSK_ERR_FAULT; -} - -#if 0 -void mali_mmu_print_state(struct mali_mmu_core *mmu) -{ - MALI_DEBUG_PRINT(2, ("MMU: State of %s is 0x%08x\n", mmu->hw_core.description, mali_hw_core_register_read(&mmu->hw_core, MALI_MMU_REGISTER_STATUS))); -} -#endif |