96 lines
3.1 KiB
C
96 lines
3.1 KiB
C
/* linux/arch/arm/plat-samsung/include/plat/sysmmu.h
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*
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* Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
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* http://www.samsung.com
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*
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* Samsung System MMU driver for S5P platform
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __PLAT_SAMSUNG_SYSMMU_H
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#define __PLAT_SAMSUNG_SYSMMU_H __FILE__
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enum S5P_SYSMMU_INTERRUPT_TYPE {
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SYSMMU_PAGEFAULT,
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SYSMMU_AR_MULTIHIT,
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SYSMMU_AW_MULTIHIT,
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SYSMMU_BUSERROR,
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SYSMMU_AR_SECURITY,
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SYSMMU_AR_ACCESS,
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SYSMMU_AW_SECURITY,
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SYSMMU_AW_PROTECTION, /* 7 */
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SYSMMU_FAULTS_NUM
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};
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#ifdef CONFIG_S5P_SYSTEM_MMU
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#include <mach/sysmmu.h>
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/**
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* s5p_sysmmu_enable() - enable system mmu of ip
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* @ips: The ip connected system mmu.
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* #pgd: Base physical address of the 1st level page table
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*
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* This function enable system mmu to transfer address
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* from virtual address to physical address
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*/
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void s5p_sysmmu_enable(sysmmu_ips ips, unsigned long pgd);
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/**
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* s5p_sysmmu_disable() - disable sysmmu mmu of ip
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* @ips: The ip connected system mmu.
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*
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* This function disable system mmu to transfer address
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* from virtual address to physical address
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*/
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void s5p_sysmmu_disable(sysmmu_ips ips);
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/**
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* s5p_sysmmu_set_tablebase_pgd() - set page table base address to refer page table
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* @ips: The ip connected system mmu.
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* @pgd: The page table base address.
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*
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* This function set page table base address
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* When system mmu transfer address from virtaul address to physical address,
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* system mmu refer address information from page table
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*/
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void s5p_sysmmu_set_tablebase_pgd(sysmmu_ips ips, unsigned long pgd);
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/**
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* s5p_sysmmu_tlb_invalidate() - flush all TLB entry in system mmu
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* @ips: The ip connected system mmu.
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*
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* This function flush all TLB entry in system mmu
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*/
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void s5p_sysmmu_tlb_invalidate(sysmmu_ips ips);
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/** s5p_sysmmu_set_fault_handler() - Fault handler for System MMUs
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* @itype: type of fault.
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* @pgtable_base: the physical address of page table base. This is 0 if @ips is
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* SYSMMU_BUSERROR.
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* @fault_addr: the device (virtual) address that the System MMU tried to
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* translated. This is 0 if @ips is SYSMMU_BUSERROR.
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* Called when interrupt occurred by the System MMUs
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* The device drivers of peripheral devices that has a System MMU can implement
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* a fault handler to resolve address translation fault by System MMU.
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* The meanings of return value and parameters are described below.
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* return value: non-zero if the fault is correctly resolved.
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* zero if the fault is not handled.
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*/
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void s5p_sysmmu_set_fault_handler(sysmmu_ips ips,
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int (*handler)(enum S5P_SYSMMU_INTERRUPT_TYPE itype,
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unsigned long pgtable_base,
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unsigned long fault_addr));
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#else
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#define s5p_sysmmu_enable(ips, pgd) do { } while (0)
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#define s5p_sysmmu_disable(ips) do { } while (0)
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#define s5p_sysmmu_set_tablebase_pgd(ips, pgd) do { } while (0)
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#define s5p_sysmmu_tlb_invalidate(ips) do { } while (0)
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#define s5p_sysmmu_set_fault_handler(ips, handler) do { } while (0)
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#endif
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#endif /* __ASM_PLAT_SYSMMU_H */
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