| KyongHo Cho | b34f003 | 2011-03-07 08:56:48 +0900 | [diff] [blame] | 1 | /* linux/arch/arm/plat-s5p/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 __ASM__PLAT_SYSMMU_H |
| 14 | #define __ASM__PLAT_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 */ |