arch/arm/plat-s5p/sysmmu.c - kernel/msm-4.9 - Gitiles

 /* linux/arch/arm/plat-s5p/sysmmu.c
  *
  * Copyright (c) 2010 Samsung Electronics Co., Ltd.
  *		http://www.samsung.com
  *
  * 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.
  */

 #include <linux/io.h>
 #include <linux/interrupt.h>
 #include <linux/platform_device.h>

 #include <mach/map.h>
 #include <mach/regs-sysmmu.h>
 #include <mach/sysmmu.h>

 struct sysmmu_controller s5p_sysmmu_cntlrs[S5P_SYSMMU_TOTAL_IPNUM];

 void s5p_sysmmu_register(struct sysmmu_controller *sysmmuconp)
 {
 	unsigned int reg_mmu_ctrl;
 	unsigned int reg_mmu_status;
 	unsigned int reg_pt_base_addr;
 	unsigned int reg_int_status;
 	unsigned int reg_page_ft_addr;

 	reg_int_status = __raw_readl(sysmmuconp->regs + S5P_INT_STATUS);
 	reg_mmu_ctrl = __raw_readl(sysmmuconp->regs + S5P_MMU_CTRL);
 	reg_mmu_status = __raw_readl(sysmmuconp->regs + S5P_MMU_STATUS);
 	reg_pt_base_addr = __raw_readl(sysmmuconp->regs + S5P_PT_BASE_ADDR);
 	reg_page_ft_addr = __raw_readl(sysmmuconp->regs + S5P_PAGE_FAULT_ADDR);

 	printk(KERN_INFO "%s: ips:%s\n", __func__, sysmmuconp->name);
 	printk(KERN_INFO "%s: MMU_CTRL:0x%X, ", __func__, reg_mmu_ctrl);
 	printk(KERN_INFO "MMU_STATUS:0x%X, PT_BASE_ADDR:0x%X\n", reg_mmu_status, reg_pt_base_addr);
 	printk(KERN_INFO "%s: INT_STATUS:0x%X, PAGE_FAULT_ADDR:0x%X\n", __func__, reg_int_status, reg_page_ft_addr);

 	switch (reg_int_status & 0xFF) {
 	case 0x1:
 		printk(KERN_INFO "%s: Page fault\n", __func__);
 		printk(KERN_INFO "%s: Virtual address causing last page fault or bus error : 0x%x\n", __func__ , reg_page_ft_addr);
 		break;
 	case 0x2:
 		printk(KERN_INFO "%s: AR multi-hit fault\n", __func__);
 		break;
 	case 0x4:
 		printk(KERN_INFO "%s: AW multi-hit fault\n", __func__);
 		break;
 	case 0x8:
 		printk(KERN_INFO "%s: Bus error\n", __func__);
 		break;
 	case 0x10:
 		printk(KERN_INFO "%s: AR Security protection fault\n", __func__);
 		break;
 	case 0x20:
 		printk(KERN_INFO "%s: AR Access protection fault\n", __func__);
 		break;
 	case 0x40:
 		printk(KERN_INFO "%s: AW Security protection fault\n", __func__);
 		break;
 	case 0x80:
 		printk(KERN_INFO "%s: AW Access protection fault\n", __func__);
 		break;
 	}
 }

 static irqreturn_t s5p_sysmmu_irq(int irq, void *dev_id)
 {
 	unsigned int i;
 	unsigned int reg_int_status;
 	struct sysmmu_controller *sysmmuconp;

 	for (i = 0; i < S5P_SYSMMU_TOTAL_IPNUM; i++) {
 		sysmmuconp = &s5p_sysmmu_cntlrs[i];

 		if (sysmmuconp->enable == true) {
 			reg_int_status = __raw_readl(sysmmuconp->regs + S5P_INT_STATUS);

 			if (reg_int_status & 0xFF)
 				s5p_sysmmu_register(sysmmuconp);
 		}
 	}
 	return IRQ_HANDLED;
 }

 int s5p_sysmmu_set_tablebase_pgd(sysmmu_ips ips, unsigned long pgd)
 {
 	struct sysmmu_controller *sysmmuconp = NULL;

 	sysmmuconp = &s5p_sysmmu_cntlrs[ips];

 	if (sysmmuconp == NULL) {
 		printk(KERN_ERR "failed to get ip's sysmmu info\n");
 		return 1;
 	}

 	/* Set sysmmu page table base address */
 	__raw_writel(pgd, sysmmuconp->regs + S5P_PT_BASE_ADDR);

 	if (s5p_sysmmu_tlb_invalidate(ips) != 0)
 		printk(KERN_ERR "failed s5p_sysmmu_tlb_invalidate\n");

 	return 0;
 }

 static int s5p_sysmmu_set_tablebase(sysmmu_ips ips)
 {
 	unsigned int pg;
 	struct sysmmu_controller *sysmmuconp;

 	sysmmuconp = &s5p_sysmmu_cntlrs[ips];

 	if (sysmmuconp == NULL) {
 		printk(KERN_ERR "failed to get ip's sysmmu info\n");
 		return 1;
 	}

 	__asm__("mrc	p15, 0, %0, c2, c0, 0"	\
 		: "=r" (pg) : : "cc");		\
 		pg &= ~0x3fff;

 	printk(KERN_INFO "%s: CP15 TTBR0 : 0x%x\n", __func__, pg);

 	/* Set sysmmu page table base address */
 	__raw_writel(pg, sysmmuconp->regs + S5P_PT_BASE_ADDR);

 	return 0;
 }

 int s5p_sysmmu_enable(sysmmu_ips ips)
 {
 	unsigned int reg;

 	struct sysmmu_controller *sysmmuconp;

 	sysmmuconp = &s5p_sysmmu_cntlrs[ips];

 	if (sysmmuconp == NULL) {
 		printk(KERN_ERR "failed to get ip's sysmmu info\n");
 		return 1;
 	}

 	s5p_sysmmu_set_tablebase(ips);

 	/* replacement policy : LRU */
 	reg = __raw_readl(sysmmuconp->regs + S5P_MMU_CFG);
 	reg |= 0x1;
 	__raw_writel(reg, sysmmuconp->regs + S5P_MMU_CFG);

 	/* Enable interrupt, Enable MMU */
 	reg = __raw_readl(sysmmuconp->regs + S5P_MMU_CTRL);
 	reg |= (0x1 << 2) | (0x1 << 0);

 	__raw_writel(reg, sysmmuconp->regs + S5P_MMU_CTRL);

 	sysmmuconp->enable = true;

 	return 0;
 }

 int s5p_sysmmu_disable(sysmmu_ips ips)
 {
 	unsigned int reg;

 	struct sysmmu_controller *sysmmuconp = NULL;

 	if (ips > S5P_SYSMMU_TOTAL_IPNUM)
 		printk(KERN_ERR "failed to get ips parameter\n");

 	sysmmuconp = &s5p_sysmmu_cntlrs[ips];

 	if (sysmmuconp == NULL) {
 		printk(KERN_ERR "failed to get ip's sysmmu info\n");
 		return 1;
 	}

 	reg = __raw_readl(sysmmuconp->regs + S5P_MMU_CFG);

 	/* replacement policy : LRU */
 	reg |= 0x1;
 	__raw_writel(reg, sysmmuconp->regs + S5P_MMU_CFG);

 	reg = __raw_readl(sysmmuconp->regs + S5P_MMU_CTRL);

 	/* Disable MMU */
 	reg &= ~0x1;
 	__raw_writel(reg, sysmmuconp->regs + S5P_MMU_CTRL);

 	sysmmuconp->enable = false;

 	return 0;
 }

 int s5p_sysmmu_tlb_invalidate(sysmmu_ips ips)
 {
 	unsigned int reg;
 	struct sysmmu_controller *sysmmuconp = NULL;

 	sysmmuconp = &s5p_sysmmu_cntlrs[ips];

 	if (sysmmuconp == NULL) {
 		printk(KERN_ERR "failed to get ip's sysmmu info\n");
 		return 1;
 	}

 	/* set Block MMU for flush TLB */
 	reg = __raw_readl(sysmmuconp->regs + S5P_MMU_CTRL);
 	reg |= 0x1 << 1;
 	__raw_writel(reg, sysmmuconp->regs + S5P_MMU_CTRL);

 	/* flush all TLB entry */
 	__raw_writel(0x1, sysmmuconp->regs + S5P_MMU_FLUSH);

 	/* set Un-block MMU after flush TLB */
 	reg = __raw_readl(sysmmuconp->regs + S5P_MMU_CTRL);
 	reg &= ~(0x1 << 1);
 	__raw_writel(reg, sysmmuconp->regs + S5P_MMU_CTRL);

 	return 0;
 }

 static int s5p_sysmmu_probe(struct platform_device *pdev)
 {
 	int i;
 	int ret;
 	struct resource *res;
 	struct sysmmu_controller *sysmmuconp;
 	sysmmu_ips ips;

 	for (i = 0; i < S5P_SYSMMU_TOTAL_IPNUM; i++) {
 		sysmmuconp = &s5p_sysmmu_cntlrs[i];
 		if (sysmmuconp == NULL) {
 			printk(KERN_ERR "failed to get ip's sysmmu info\n");
 			ret = -ENOENT;
 			goto err_res;
 		}

 		sysmmuconp->name = sysmmu_ips_name[i];

 		res = platform_get_resource(pdev, IORESOURCE_MEM, i);
 		if (!res) {
 			printk(KERN_ERR "failed to get sysmmu resource\n");
 			ret = -ENODEV;
 			goto err_res;
 		}

 		sysmmuconp->mem = request_mem_region(res->start,
 				((res->end) - (res->start)) + 1, pdev->name);
 		if (!sysmmuconp->mem) {
 			pr_err("failed to request sysmmu memory region\n");
 			ret = -EBUSY;
 			goto err_res;
 		}

 		sysmmuconp->regs = ioremap(res->start, res->end - res->start + 1);
 		if (!sysmmuconp->regs) {
 			pr_err("failed to sysmmu ioremap\n");
 			ret = -ENXIO;
 			goto err_reg;
 		}

 		sysmmuconp->irq = platform_get_irq(pdev, i);
 		if (sysmmuconp->irq <= 0) {
 			pr_err("failed to get sysmmu irq resource\n");
 			ret = -ENOENT;
 			goto err_map;
 		}

 		ret = request_irq(sysmmuconp->irq, s5p_sysmmu_irq, IRQF_DISABLED, pdev->name, sysmmuconp);
 		if (ret) {
 			pr_err("failed to request irq\n");
 			ret = -ENOENT;
 			goto err_map;
 		}

 		ips = (sysmmu_ips)i;

 		sysmmuconp->ips = ips;
 	}

 	return 0;

 err_reg:
 	release_mem_region((resource_size_t)sysmmuconp->mem, (resource_size_t)((res->end) - (res->start) + 1));
 err_map:
 	iounmap(sysmmuconp->regs);
 err_res:
 	return ret;
 }

 static int s5p_sysmmu_remove(struct platform_device *pdev)
 {
 	return 0;
 }
 int s5p_sysmmu_runtime_suspend(struct device *dev)
 {
 	return 0;
 }

 int s5p_sysmmu_runtime_resume(struct device *dev)
 {
 	return 0;
 }

 const struct dev_pm_ops s5p_sysmmu_pm_ops = {
 	.runtime_suspend	= s5p_sysmmu_runtime_suspend,
 	.runtime_resume		= s5p_sysmmu_runtime_resume,
 };

 static struct platform_driver s5p_sysmmu_driver = {
 	.probe		= s5p_sysmmu_probe,
 	.remove		= s5p_sysmmu_remove,
 	.driver		= {
 		.owner		= THIS_MODULE,
 		.name		= "s5p-sysmmu",
 		.pm		= &s5p_sysmmu_pm_ops,
 	}
 };

 static int __init s5p_sysmmu_init(void)
 {
 	return platform_driver_register(&s5p_sysmmu_driver);
 }
 arch_initcall(s5p_sysmmu_init);
	/* linux/arch/arm/plat-s5p/sysmmu.c
	*
	* Copyright (c) 2010 Samsung Electronics Co., Ltd.
	* http://www.samsung.com
	*
	* 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.
	*/

	#include <linux/io.h>
	#include <linux/interrupt.h>
	#include <linux/platform_device.h>

	#include <mach/map.h>
	#include <mach/regs-sysmmu.h>
	#include <mach/sysmmu.h>

	struct sysmmu_controller s5p_sysmmu_cntlrs[S5P_SYSMMU_TOTAL_IPNUM];

	void s5p_sysmmu_register(struct sysmmu_controller *sysmmuconp)
	{
	unsigned int reg_mmu_ctrl;
	unsigned int reg_mmu_status;
	unsigned int reg_pt_base_addr;
	unsigned int reg_int_status;
	unsigned int reg_page_ft_addr;

	reg_int_status = __raw_readl(sysmmuconp->regs + S5P_INT_STATUS);
	reg_mmu_ctrl = __raw_readl(sysmmuconp->regs + S5P_MMU_CTRL);
	reg_mmu_status = __raw_readl(sysmmuconp->regs + S5P_MMU_STATUS);
	reg_pt_base_addr = __raw_readl(sysmmuconp->regs + S5P_PT_BASE_ADDR);
	reg_page_ft_addr = __raw_readl(sysmmuconp->regs + S5P_PAGE_FAULT_ADDR);

	printk(KERN_INFO "%s: ips:%s\n", __func__, sysmmuconp->name);
	printk(KERN_INFO "%s: MMU_CTRL:0x%X, ", __func__, reg_mmu_ctrl);
	printk(KERN_INFO "MMU_STATUS:0x%X, PT_BASE_ADDR:0x%X\n", reg_mmu_status, reg_pt_base_addr);
	printk(KERN_INFO "%s: INT_STATUS:0x%X, PAGE_FAULT_ADDR:0x%X\n", __func__, reg_int_status, reg_page_ft_addr);

	switch (reg_int_status & 0xFF) {
	case 0x1:
	printk(KERN_INFO "%s: Page fault\n", __func__);
	printk(KERN_INFO "%s: Virtual address causing last page fault or bus error : 0x%x\n", __func__ , reg_page_ft_addr);
	break;
	case 0x2:
	printk(KERN_INFO "%s: AR multi-hit fault\n", __func__);
	break;
	case 0x4:
	printk(KERN_INFO "%s: AW multi-hit fault\n", __func__);
	break;
	case 0x8:
	printk(KERN_INFO "%s: Bus error\n", __func__);
	break;
	case 0x10:
	printk(KERN_INFO "%s: AR Security protection fault\n", __func__);
	break;
	case 0x20:
	printk(KERN_INFO "%s: AR Access protection fault\n", __func__);
	break;
	case 0x40:
	printk(KERN_INFO "%s: AW Security protection fault\n", __func__);
	break;
	case 0x80:
	printk(KERN_INFO "%s: AW Access protection fault\n", __func__);
	break;
	}
	}

	static irqreturn_t s5p_sysmmu_irq(int irq, void *dev_id)
	{
	unsigned int i;
	unsigned int reg_int_status;
	struct sysmmu_controller *sysmmuconp;

	for (i = 0; i < S5P_SYSMMU_TOTAL_IPNUM; i++) {
	sysmmuconp = &s5p_sysmmu_cntlrs[i];

	if (sysmmuconp->enable == true) {
	reg_int_status = __raw_readl(sysmmuconp->regs + S5P_INT_STATUS);

	if (reg_int_status & 0xFF)
	s5p_sysmmu_register(sysmmuconp);
	}
	}
	return IRQ_HANDLED;
	}

	int s5p_sysmmu_set_tablebase_pgd(sysmmu_ips ips, unsigned long pgd)
	{
	struct sysmmu_controller *sysmmuconp = NULL;

	sysmmuconp = &s5p_sysmmu_cntlrs[ips];

	if (sysmmuconp == NULL) {
	printk(KERN_ERR "failed to get ip's sysmmu info\n");
	return 1;
	}

	/* Set sysmmu page table base address */
	__raw_writel(pgd, sysmmuconp->regs + S5P_PT_BASE_ADDR);

	if (s5p_sysmmu_tlb_invalidate(ips) != 0)
	printk(KERN_ERR "failed s5p_sysmmu_tlb_invalidate\n");

	return 0;
	}

	static int s5p_sysmmu_set_tablebase(sysmmu_ips ips)
	{
	unsigned int pg;
	struct sysmmu_controller *sysmmuconp;

	sysmmuconp = &s5p_sysmmu_cntlrs[ips];

	if (sysmmuconp == NULL) {
	printk(KERN_ERR "failed to get ip's sysmmu info\n");
	return 1;
	}

	__asm__("mrc p15, 0, %0, c2, c0, 0" \
	: "=r" (pg) : : "cc"); \
	pg &= ~0x3fff;

	printk(KERN_INFO "%s: CP15 TTBR0 : 0x%x\n", __func__, pg);

	/* Set sysmmu page table base address */
	__raw_writel(pg, sysmmuconp->regs + S5P_PT_BASE_ADDR);

	return 0;
	}

	int s5p_sysmmu_enable(sysmmu_ips ips)
	{
	unsigned int reg;

	struct sysmmu_controller *sysmmuconp;

	sysmmuconp = &s5p_sysmmu_cntlrs[ips];

	if (sysmmuconp == NULL) {
	printk(KERN_ERR "failed to get ip's sysmmu info\n");
	return 1;
	}

	s5p_sysmmu_set_tablebase(ips);

	/* replacement policy : LRU */
	reg = __raw_readl(sysmmuconp->regs + S5P_MMU_CFG);
	reg \|= 0x1;
	__raw_writel(reg, sysmmuconp->regs + S5P_MMU_CFG);

	/* Enable interrupt, Enable MMU */
	reg = __raw_readl(sysmmuconp->regs + S5P_MMU_CTRL);
	reg \|= (0x1 << 2) \| (0x1 << 0);

	__raw_writel(reg, sysmmuconp->regs + S5P_MMU_CTRL);

	sysmmuconp->enable = true;

	return 0;
	}

	int s5p_sysmmu_disable(sysmmu_ips ips)
	{
	unsigned int reg;

	struct sysmmu_controller *sysmmuconp = NULL;

	if (ips > S5P_SYSMMU_TOTAL_IPNUM)
	printk(KERN_ERR "failed to get ips parameter\n");

	sysmmuconp = &s5p_sysmmu_cntlrs[ips];

	if (sysmmuconp == NULL) {
	printk(KERN_ERR "failed to get ip's sysmmu info\n");
	return 1;
	}

	reg = __raw_readl(sysmmuconp->regs + S5P_MMU_CFG);

	/* replacement policy : LRU */
	reg \|= 0x1;
	__raw_writel(reg, sysmmuconp->regs + S5P_MMU_CFG);

	reg = __raw_readl(sysmmuconp->regs + S5P_MMU_CTRL);

	/* Disable MMU */
	reg &= ~0x1;
	__raw_writel(reg, sysmmuconp->regs + S5P_MMU_CTRL);

	sysmmuconp->enable = false;

	return 0;
	}

	int s5p_sysmmu_tlb_invalidate(sysmmu_ips ips)
	{
	unsigned int reg;
	struct sysmmu_controller *sysmmuconp = NULL;

	sysmmuconp = &s5p_sysmmu_cntlrs[ips];

	if (sysmmuconp == NULL) {
	printk(KERN_ERR "failed to get ip's sysmmu info\n");
	return 1;
	}

	/* set Block MMU for flush TLB */
	reg = __raw_readl(sysmmuconp->regs + S5P_MMU_CTRL);
	reg \|= 0x1 << 1;
	__raw_writel(reg, sysmmuconp->regs + S5P_MMU_CTRL);

	/* flush all TLB entry */
	__raw_writel(0x1, sysmmuconp->regs + S5P_MMU_FLUSH);

	/* set Un-block MMU after flush TLB */
	reg = __raw_readl(sysmmuconp->regs + S5P_MMU_CTRL);
	reg &= ~(0x1 << 1);
	__raw_writel(reg, sysmmuconp->regs + S5P_MMU_CTRL);

	return 0;
	}

	static int s5p_sysmmu_probe(struct platform_device *pdev)
	{
	int i;
	int ret;
	struct resource *res;
	struct sysmmu_controller *sysmmuconp;
	sysmmu_ips ips;

	for (i = 0; i < S5P_SYSMMU_TOTAL_IPNUM; i++) {
	sysmmuconp = &s5p_sysmmu_cntlrs[i];
	if (sysmmuconp == NULL) {
	printk(KERN_ERR "failed to get ip's sysmmu info\n");
	ret = -ENOENT;
	goto err_res;
	}

	sysmmuconp->name = sysmmu_ips_name[i];

	res = platform_get_resource(pdev, IORESOURCE_MEM, i);
	if (!res) {
	printk(KERN_ERR "failed to get sysmmu resource\n");
	ret = -ENODEV;
	goto err_res;
	}

	sysmmuconp->mem = request_mem_region(res->start,
	((res->end) - (res->start)) + 1, pdev->name);
	if (!sysmmuconp->mem) {
	pr_err("failed to request sysmmu memory region\n");
	ret = -EBUSY;
	goto err_res;
	}

	sysmmuconp->regs = ioremap(res->start, res->end - res->start + 1);
	if (!sysmmuconp->regs) {
	pr_err("failed to sysmmu ioremap\n");
	ret = -ENXIO;
	goto err_reg;
	}

	sysmmuconp->irq = platform_get_irq(pdev, i);
	if (sysmmuconp->irq <= 0) {
	pr_err("failed to get sysmmu irq resource\n");
	ret = -ENOENT;
	goto err_map;
	}

	ret = request_irq(sysmmuconp->irq, s5p_sysmmu_irq, IRQF_DISABLED, pdev->name, sysmmuconp);
	if (ret) {
	pr_err("failed to request irq\n");
	ret = -ENOENT;
	goto err_map;
	}

	ips = (sysmmu_ips)i;

	sysmmuconp->ips = ips;
	}

	return 0;

	err_reg:
	release_mem_region((resource_size_t)sysmmuconp->mem, (resource_size_t)((res->end) - (res->start) + 1));
	err_map:
	iounmap(sysmmuconp->regs);
	err_res:
	return ret;
	}

	static int s5p_sysmmu_remove(struct platform_device *pdev)
	{
	return 0;
	}
	int s5p_sysmmu_runtime_suspend(struct device *dev)
	{
	return 0;
	}

	int s5p_sysmmu_runtime_resume(struct device *dev)
	{
	return 0;
	}

	const struct dev_pm_ops s5p_sysmmu_pm_ops = {
	.runtime_suspend = s5p_sysmmu_runtime_suspend,
	.runtime_resume = s5p_sysmmu_runtime_resume,
	};

	static struct platform_driver s5p_sysmmu_driver = {
	.probe = s5p_sysmmu_probe,
	.remove = s5p_sysmmu_remove,
	.driver = {
	.owner = THIS_MODULE,
	.name = "s5p-sysmmu",
	.pm = &s5p_sysmmu_pm_ops,
	}
	};

	static int __init s5p_sysmmu_init(void)
	{
	return platform_driver_register(&s5p_sysmmu_driver);
	}
	arch_initcall(s5p_sysmmu_init);