ARM: EXYNOS4: Enhancement of System MMU driver

This patch includes the following enhancements for System MMU:
- Enhanced readability
- Removal of unused data structures or their members
- Simplified function definitions
- Corrections of some logical errors
- Full compliance with Linux coding style
- Simpler way of registering callback functions of System MMU faults

Signed-off-by: KyongHo Cho <pullip.cho@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

3 files changed, 30 insertions, 85 deletions

diff --git a/arch/arm/mach-exynos4/dev-sysmmu.c b/arch/arm/mach-exynos4/dev-sysmmu.c
index a10790a614ec..6889c9aa6493 100644
--- a/arch/arm/mach-exynos4/dev-sysmmu.c
+++ b/arch/arm/mach-exynos4/dev-sysmmu.c
@@ -15,6 +15,28 @@
 
 #include <mach/map.h>
 #include <mach/irqs.h>
+#include <mach/sysmmu.h>
+#include <plat/s5p-clock.h>
+
+/* These names must be equal to the clock names in mach-exynos4/clock.c */
+const char *sysmmu_ips_name[EXYNOS4_SYSMMU_TOTAL_IPNUM] = {
+	"SYSMMU_MDMA"	,
+	"SYSMMU_SSS"	,
+	"SYSMMU_FIMC0"	,
+	"SYSMMU_FIMC1"	,
+	"SYSMMU_FIMC2"	,
+	"SYSMMU_FIMC3"	,
+	"SYSMMU_JPEG"	,
+	"SYSMMU_FIMD0"	,
+	"SYSMMU_FIMD1"	,
+	"SYSMMU_PCIe"	,
+	"SYSMMU_G2D"	,
+	"SYSMMU_ROTATOR",
+	"SYSMMU_MDMA2"	,
+	"SYSMMU_TV"	,
+	"SYSMMU_MFC_L"	,
+	"SYSMMU_MFC_R"	,
+};
 
 static struct resource exynos4_sysmmu_resource[] = {
 	[0] = {
@@ -185,5 +207,4 @@ struct platform_device exynos4_device_sysmmu = {
 	.num_resources	= ARRAY_SIZE(exynos4_sysmmu_resource),
 	.resource	= exynos4_sysmmu_resource,
 };
-
 EXPORT_SYMBOL(exynos4_device_sysmmu);
diff --git a/arch/arm/mach-exynos4/include/mach/regs-sysmmu.h b/arch/arm/mach-exynos4/include/mach/regs-sysmmu.h
index b6aef863b9d6..68ff6ad08a2b 100644
--- a/arch/arm/mach-exynos4/include/mach/regs-sysmmu.h
+++ b/arch/arm/mach-exynos4/include/mach/regs-sysmmu.h
@@ -19,6 +19,10 @@
 #define S5P_MMU_FLUSH			0x00C
 #define S5P_PT_BASE_ADDR		0x014
 #define S5P_INT_STATUS			0x018
+#define S5P_INT_CLEAR			0x01C
 #define S5P_PAGE_FAULT_ADDR		0x024
+#define S5P_AW_FAULT_ADDR		0x028
+#define S5P_AR_FAULT_ADDR		0x02C
+#define S5P_DEFAULT_SLAVE_ADDR		0x030
 
 #endif /* __ASM_ARCH_REGS_SYSMMU_H */
diff --git a/arch/arm/mach-exynos4/include/mach/sysmmu.h b/arch/arm/mach-exynos4/include/mach/sysmmu.h
index 1428adad8379..eff3dc37f3da 100644
--- a/arch/arm/mach-exynos4/include/mach/sysmmu.h
+++ b/arch/arm/mach-exynos4/include/mach/sysmmu.h
@@ -13,9 +13,6 @@
 #ifndef __ASM_ARM_ARCH_SYSMMU_H
 #define __ASM_ARM_ARCH_SYSMMU_H __FILE__
 
-#define EXYNOS4_SYSMMU_TOTAL_IPNUM	16
-#define S5P_SYSMMU_TOTAL_IPNUM		EXYNOS4_SYSMMU_TOTAL_IPNUM
-
 enum exynos4_sysmmu_ips {
 	SYSMMU_MDMA,
 	SYSMMU_SSS,
@@ -33,90 +30,13 @@ enum exynos4_sysmmu_ips {
 	SYSMMU_TV,
 	SYSMMU_MFC_L,
 	SYSMMU_MFC_R,
+	EXYNOS4_SYSMMU_TOTAL_IPNUM,
 };
 
-static char *sysmmu_ips_name[EXYNOS4_SYSMMU_TOTAL_IPNUM] = {
-	"SYSMMU_MDMA"	,
-	"SYSMMU_SSS"	,
-	"SYSMMU_FIMC0"	,
-	"SYSMMU_FIMC1"	,
-	"SYSMMU_FIMC2"	,
-	"SYSMMU_FIMC3"	,
-	"SYSMMU_JPEG"	,
-	"SYSMMU_FIMD0"	,
-	"SYSMMU_FIMD1"	,
-	"SYSMMU_PCIe"	,
-	"SYSMMU_G2D"	,
-	"SYSMMU_ROTATOR",
-	"SYSMMU_MDMA2"	,
-	"SYSMMU_TV"	,
-	"SYSMMU_MFC_L"	,
-	"SYSMMU_MFC_R"	,
-};
-
-typedef enum exynos4_sysmmu_ips sysmmu_ips;
-
-struct sysmmu_tt_info {
-	unsigned long *pgd;
-	unsigned long pgd_paddr;
-	unsigned long *pte;
-};
-
-struct sysmmu_controller {
-	const char		*name;
-
-	/* channels registers */
-	void __iomem		*regs;
-
-	/* channel irq */
-	unsigned int		irq;
-
-	sysmmu_ips		ips;
-
-	/* Translation Table Info. */
-	struct sysmmu_tt_info	*tt_info;
-
-	struct resource		*mem;
-	struct device		*dev;
-
-	/* SysMMU controller enable - true : enable */
-	bool			enable;
-};
-
-/**
- * s5p_sysmmu_enable() - enable system mmu of ip
- * @ips: The ip connected system mmu.
- *
- * This function enable system mmu to transfer address
- * from virtual address to physical address
- */
-int s5p_sysmmu_enable(sysmmu_ips ips);
+#define S5P_SYSMMU_TOTAL_IPNUM		EXYNOS4_SYSMMU_TOTAL_IPNUM
 
-/**
- * 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
- */
-int s5p_sysmmu_disable(sysmmu_ips ips);
+extern const char *sysmmu_ips_name[EXYNOS4_SYSMMU_TOTAL_IPNUM];
 
-/**
- * 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
- */
-int s5p_sysmmu_set_tablebase_pgd(sysmmu_ips ips, unsigned long pgd);
+typedef enum exynos4_sysmmu_ips sysmmu_ips;
 
-/**
- * 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
- */
-int s5p_sysmmu_tlb_invalidate(sysmmu_ips ips);
 #endif /* __ASM_ARM_ARCH_SYSMMU_H */