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 */
96