--- /dev/null
+/* 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);
projects / mv-sheeva.git / blobdiff