2 * Rockchip - System MMU support
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
9 #ifndef _ARM_MACH_RK_SYSMMU_H_
10 #define _ARM_MACH_RK_SYSMMU_H_
12 #include <linux/list.h>
13 #include <linux/atomic.h>
14 #include <linux/spinlock.h>
16 #define IEP_SYSMMU_COMPATIBLE_NAME "iommu,iep_mmu"
17 #define VIP_SYSMMU_COMPATIBLE_NAME "iommu,vip_mmu"
19 #define ISP_SYSMMU0_COMPATIBLE_NAME "iommu,isp_mmu0"
20 #define ISP_SYSMMU1_COMPATIBLE_NAME "iommu,isp_mmu1"
22 #define VOPB_SYSMMU_COMPATIBLE_NAME "iommu,vopb_mmu"
23 #define VOPL_SYSMMU_COMPATIBLE_NAME "iommu,vopl_mmu"
25 #define HEVC_SYSMMU_COMPATIBLE_NAME "iommu,hevc_mmu"
26 #define VPU_SYSMMU_COMPATIBLE_NAME "iommu,vpu_mmu"
29 enum rk_sysmmu_inttype {
36 struct sysmmu_drvdata;
38 * @itype: type of fault.
39 * @pgtable_base: the physical address of page table base. This is 0 if @itype
41 * @fault_addr: the device (virtual) address that the System MMU tried to
42 * translated. This is 0 if @itype is SYSMMU_BUSERROR.
44 typedef int (*sysmmu_fault_handler_t)(struct device *dev,
45 enum rk_sysmmu_inttype itype,
46 unsigned long pgtable_base,
47 unsigned long fault_addr,
51 #ifdef CONFIG_ROCKCHIP_IOMMU
53 * rockchip_sysmmu_enable() - enable system mmu
54 * @owner: The device whose System MMU is about to be enabled.
55 * @pgd: Base physical address of the 1st level page table
57 * This function enable system mmu to transfer address
58 * from virtual address to physical address.
59 * Return non-zero if it fails to enable System MMU.
61 int rockchip_sysmmu_enable(struct device *owner, unsigned long pgd);
64 * rockchip_sysmmu_disable() - disable sysmmu mmu of ip
65 * @owner: The device whose System MMU is about to be disabled.
67 * This function disable system mmu to transfer address
68 * from virtual address to physical address
70 bool rockchip_sysmmu_disable(struct device *owner);
73 * rockchip_sysmmu_tlb_invalidate() - flush all TLB entry in system mmu
74 * @owner: The device whose System MMU.
76 * This function flush all TLB entry in system mmu
78 void rockchip_sysmmu_tlb_invalidate(struct device *owner);
80 /** rockchip_sysmmu_set_fault_handler() - Fault handler for System MMUs
81 * Called when interrupt occurred by the System MMUs
82 * The device drivers of peripheral devices that has a System MMU can implement
83 * a fault handler to resolve address translation fault by System MMU.
84 * The meanings of return value and parameters are described below.
86 * return value: non-zero if the fault is correctly resolved.
87 * zero if the fault is not handled.
89 void rockchip_sysmmu_set_fault_handler(struct device *dev,sysmmu_fault_handler_t handler);
91 /** rockchip_sysmmu_set_prefbuf() - Initialize prefetch buffers of System MMU v3
92 * @owner: The device which need to set the prefetch buffers
93 * @base0: The start virtual address of the area of the @owner device that the
94 * first prefetch buffer loads translation descriptors
95 * @size0: The last virtual address of the area of the @owner device that the
96 * first prefetch buffer loads translation descriptors.
97 * @base1: The start virtual address of the area of the @owner device that the
98 * second prefetch buffer loads translation descriptors. This will be
99 * ignored if @size1 is 0 and this function assigns the 2 prefetch
100 * buffers with each half of the area specified by @base0 and @size0
101 * @size1: The last virtual address of the area of the @owner device that the
102 * prefetch buffer loads translation descriptors. This can be 0. See
103 * the description of @base1 for more information with @size1 = 0
105 void rockchip_sysmmu_set_prefbuf(struct device *owner,
106 unsigned long base0, unsigned long size0,
107 unsigned long base1, unsigned long size1);
108 #else /* CONFIG_ROCKCHIP_IOMMU */
109 #define rockchip_sysmmu_enable(owner, pgd) do { } while (0)
110 #define rockchip_sysmmu_disable(owner) do { } while (0)
111 #define rockchip_sysmmu_tlb_invalidate(owner) do { } while (0)
112 #define rockchip_sysmmu_set_fault_handler(sysmmu, handler) do { } while (0)
113 #define rockchip_sysmmu_set_prefbuf(owner, b0, s0, b1, s1) do { } while (0)
116 #ifdef CONFIG_IOMMU_API
117 #include <linux/device.h>
118 static inline void platform_set_sysmmu(struct device *sysmmu, struct device *dev)
120 dev->archdata.iommu = sysmmu;
123 #define platform_set_sysmmu(dev, sysmmu) do { } while (0)
126 #endif /* _ARM_MACH_RK_SYSMMU_H_ */