arch/arm/plat-samsung/include/plat/sysmmu.h

   1 /* linux/arch/arm/plat-samsung/include/plat/sysmmu.h
   2  *
   3  * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
   4  *              http://www.samsung.com
   5  *
   6  * Samsung System MMU driver for S5P platform
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11 */
  12
  13 #ifndef __PLAT_SAMSUNG_SYSMMU_H
  14 #define __PLAT_SAMSUNG_SYSMMU_H __FILE__
  15
  16 enum S5P_SYSMMU_INTERRUPT_TYPE {
  17         SYSMMU_PAGEFAULT,
  18         SYSMMU_AR_MULTIHIT,
  19         SYSMMU_AW_MULTIHIT,
  20         SYSMMU_BUSERROR,
  21         SYSMMU_AR_SECURITY,
  22         SYSMMU_AR_ACCESS,
  23         SYSMMU_AW_SECURITY,
  24         SYSMMU_AW_PROTECTION, /* 7 */
  25         SYSMMU_FAULTS_NUM
  26 };
  27
  28 #ifdef CONFIG_S5P_SYSTEM_MMU
  29
  30 #include <mach/sysmmu.h>
  31
  32 /**
  33  * s5p_sysmmu_enable() - enable system mmu of ip
  34  * @ips: The ip connected system mmu.
  35  * #pgd: Base physical address of the 1st level page table
  36  *
  37  * This function enable system mmu to transfer address
  38  * from virtual address to physical address
  39  */
  40 void s5p_sysmmu_enable(sysmmu_ips ips, unsigned long pgd);
  41
  42 /**
  43  * s5p_sysmmu_disable() - disable sysmmu mmu of ip
  44  * @ips: The ip connected system mmu.
  45  *
  46  * This function disable system mmu to transfer address
  47  * from virtual address to physical address
  48  */
  49 void s5p_sysmmu_disable(sysmmu_ips ips);
  50
  51 /**
  52  * s5p_sysmmu_set_tablebase_pgd() - set page table base address to refer page table
  53  * @ips: The ip connected system mmu.
  54  * @pgd: The page table base address.
  55  *
  56  * This function set page table base address
  57  * When system mmu transfer address from virtaul address to physical address,
  58  * system mmu refer address information from page table
  59  */
  60 void s5p_sysmmu_set_tablebase_pgd(sysmmu_ips ips, unsigned long pgd);
  61
  62 /**
  63  * s5p_sysmmu_tlb_invalidate() - flush all TLB entry in system mmu
  64  * @ips: The ip connected system mmu.
  65  *
  66  * This function flush all TLB entry in system mmu
  67  */
  68 void s5p_sysmmu_tlb_invalidate(sysmmu_ips ips);
  69
  70 /** s5p_sysmmu_set_fault_handler() - Fault handler for System MMUs
  71  * @itype: type of fault.
  72  * @pgtable_base: the physical address of page table base. This is 0 if @ips is
  73  *               SYSMMU_BUSERROR.
  74  * @fault_addr: the device (virtual) address that the System MMU tried to
  75  *             translated. This is 0 if @ips is SYSMMU_BUSERROR.
  76  * Called when interrupt occurred by the System MMUs
  77  * The device drivers of peripheral devices that has a System MMU can implement
  78  * a fault handler to resolve address translation fault by System MMU.
  79  * The meanings of return value and parameters are described below.
  80
  81  * return value: non-zero if the fault is correctly resolved.
  82  *         zero if the fault is not handled.
  83  */
  84 void s5p_sysmmu_set_fault_handler(sysmmu_ips ips,
  85                         int (*handler)(enum S5P_SYSMMU_INTERRUPT_TYPE itype,
  86                                         unsigned long pgtable_base,
  87                                         unsigned long fault_addr));
  88 #else
  89 #define s5p_sysmmu_enable(ips, pgd) do { } while (0)
  90 #define s5p_sysmmu_disable(ips) do { } while (0)
  91 #define s5p_sysmmu_set_tablebase_pgd(ips, pgd) do { } while (0)
  92 #define s5p_sysmmu_tlb_invalidate(ips) do { } while (0)
  93 #define s5p_sysmmu_set_fault_handler(ips, handler) do { } while (0)
  94 #endif
  95 #endif /* __ASM_PLAT_SYSMMU_H */