From 849369d6c66d3054688672f97d31fceb8e8230fb Mon Sep 17 00:00:00 2001
From: root <root@artemis.panaceas.org>
Date: Fri, 25 Dec 2015 04:40:36 +0000
Subject: initial_commit

---
 arch/arm/plat-s5p/include/plat/sysmmu.h | 95 +++++++++++++++++++++++++++++++++
 1 file changed, 95 insertions(+)
 create mode 100644 arch/arm/plat-s5p/include/plat/sysmmu.h

(limited to 'arch/arm/plat-s5p/include/plat/sysmmu.h')

diff --git a/arch/arm/plat-s5p/include/plat/sysmmu.h b/arch/arm/plat-s5p/include/plat/sysmmu.h
new file mode 100644
index 00000000..bf5283c2
--- /dev/null
+++ b/arch/arm/plat-s5p/include/plat/sysmmu.h
@@ -0,0 +1,95 @@
+/* linux/arch/arm/plat-s5p/include/plat/sysmmu.h
+ *
+ * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.com
+ *
+ * Samsung System MMU driver for S5P platform
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#ifndef __ASM__PLAT_SYSMMU_H
+#define __ASM__PLAT_SYSMMU_H __FILE__
+
+enum S5P_SYSMMU_INTERRUPT_TYPE {
+	SYSMMU_PAGEFAULT,
+	SYSMMU_AR_MULTIHIT,
+	SYSMMU_AW_MULTIHIT,
+	SYSMMU_BUSERROR,
+	SYSMMU_AR_SECURITY,
+	SYSMMU_AR_ACCESS,
+	SYSMMU_AW_SECURITY,
+	SYSMMU_AW_PROTECTION, /* 7 */
+	SYSMMU_FAULTS_NUM
+};
+
+#ifdef CONFIG_S5P_SYSTEM_MMU
+
+#include <mach/sysmmu.h>
+
+/**
+ * s5p_sysmmu_enable() - enable system mmu of ip
+ * @ips: The ip connected system mmu.
+ * #pgd: Base physical address of the 1st level page table
+ *
+ * This function enable system mmu to transfer address
+ * from virtual address to physical address
+ */
+void s5p_sysmmu_enable(sysmmu_ips ips, unsigned long pgd);
+
+/**
+ * s5p_sysmmu_disable() - disable sysmmu mmu of ip
+ * @ips: The ip connected system mmu.
+ *
+ * This function disable system mmu to transfer address
+ * from virtual address to physical address
+ */
+void s5p_sysmmu_disable(sysmmu_ips ips);
+
+/**
+ * s5p_sysmmu_set_tablebase_pgd() - set page table base address to refer page table
+ * @ips: The ip connected system mmu.
+ * @pgd: The page table base address.
+ *
+ * This function set page table base address
+ * When system mmu transfer address from virtaul address to physical address,
+ * system mmu refer address information from page table
+ */
+void s5p_sysmmu_set_tablebase_pgd(sysmmu_ips ips, unsigned long pgd);
+
+/**
+ * s5p_sysmmu_tlb_invalidate() - flush all TLB entry in system mmu
+ * @ips: The ip connected system mmu.
+ *
+ * This function flush all TLB entry in system mmu
+ */
+void s5p_sysmmu_tlb_invalidate(sysmmu_ips ips);
+
+/** s5p_sysmmu_set_fault_handler() - Fault handler for System MMUs
+ * @itype: type of fault.
+ * @pgtable_base: the physical address of page table base. This is 0 if @ips is
+ *               SYSMMU_BUSERROR.
+ * @fault_addr: the device (virtual) address that the System MMU tried to
+ *             translated. This is 0 if @ips is SYSMMU_BUSERROR.
+ * Called when interrupt occurred by the System MMUs
+ * The device drivers of peripheral devices that has a System MMU can implement
+ * a fault handler to resolve address translation fault by System MMU.
+ * The meanings of return value and parameters are described below.
+
+ * return value: non-zero if the fault is correctly resolved.
+ *         zero if the fault is not handled.
+ */
+void s5p_sysmmu_set_fault_handler(sysmmu_ips ips,
+			int (*handler)(enum S5P_SYSMMU_INTERRUPT_TYPE itype,
+					unsigned long pgtable_base,
+					unsigned long fault_addr));
+#else
+#define s5p_sysmmu_enable(ips, pgd) do { } while (0)
+#define s5p_sysmmu_disable(ips) do { } while (0)
+#define s5p_sysmmu_set_tablebase_pgd(ips, pgd) do { } while (0)
+#define s5p_sysmmu_tlb_invalidate(ips) do { } while (0)
+#define s5p_sysmmu_set_fault_handler(ips, handler) do { } while (0)
+#endif
+#endif /* __ASM_PLAT_SYSMMU_H */
-- 
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