diff options
| -rw-r--r-- | arch/arm/mach-exynos4/dev-sysmmu.c | 23 | ||||
| -rw-r--r-- | arch/arm/mach-exynos4/include/mach/regs-sysmmu.h | 4 | ||||
| -rw-r--r-- | arch/arm/mach-exynos4/include/mach/sysmmu.h | 88 | ||||
| -rw-r--r-- | arch/arm/plat-s5p/include/plat/sysmmu.h | 95 | ||||
| -rw-r--r-- | arch/arm/plat-s5p/sysmmu.c | 368 |
5 files changed, 299 insertions, 279 deletions
diff --git a/arch/arm/mach-exynos4/dev-sysmmu.c b/arch/arm/mach-exynos4/dev-sysmmu.c index a10790a..6889c9a 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 b6aef86..68ff6ad 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 1428ada..eff3dc3 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 */ 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 0000000..bf5283c --- /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 */ diff --git a/arch/arm/plat-s5p/sysmmu.c b/arch/arm/plat-s5p/sysmmu.c index ffe8a48..89e024f 100644 --- a/arch/arm/plat-s5p/sysmmu.c +++ b/arch/arm/plat-s5p/sysmmu.c @@ -12,280 +12,260 @@ #include <linux/interrupt.h> #include <linux/platform_device.h> +#include <asm/pgtable.h> + #include <mach/map.h> #include <mach/regs-sysmmu.h> -#include <mach/sysmmu.h> +#include <plat/sysmmu.h> + +#define CTRL_ENABLE 0x5 +#define CTRL_BLOCK 0x7 +#define CTRL_DISABLE 0x0 + +static struct device *dev; + +static unsigned short fault_reg_offset[SYSMMU_FAULTS_NUM] = { + S5P_PAGE_FAULT_ADDR, + S5P_AR_FAULT_ADDR, + S5P_AW_FAULT_ADDR, + S5P_DEFAULT_SLAVE_ADDR, + S5P_AR_FAULT_ADDR, + S5P_AR_FAULT_ADDR, + S5P_AW_FAULT_ADDR, + S5P_AW_FAULT_ADDR +}; -struct sysmmu_controller s5p_sysmmu_cntlrs[S5P_SYSMMU_TOTAL_IPNUM]; +static char *sysmmu_fault_name[SYSMMU_FAULTS_NUM] = { + "PAGE FAULT", + "AR MULTI-HIT FAULT", + "AW MULTI-HIT FAULT", + "BUS ERROR", + "AR SECURITY PROTECTION FAULT", + "AR ACCESS PROTECTION FAULT", + "AW SECURITY PROTECTION FAULT", + "AW ACCESS PROTECTION FAULT" +}; -void s5p_sysmmu_register(struct sysmmu_controller *sysmmuconp) +static int (*fault_handlers[S5P_SYSMMU_TOTAL_IPNUM])( + enum S5P_SYSMMU_INTERRUPT_TYPE itype, + unsigned long pgtable_base, + unsigned long fault_addr); + +/* + * If adjacent 2 bits are true, the system MMU is enabled. + * The system MMU is disabled, otherwise. + */ +static unsigned long sysmmu_states; + +static inline void set_sysmmu_active(sysmmu_ips ips) { - 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; - } + sysmmu_states |= 3 << (ips * 2); } -static irqreturn_t s5p_sysmmu_irq(int irq, void *dev_id) +static inline void set_sysmmu_inactive(sysmmu_ips ips) { - 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; + sysmmu_states &= ~(3 << (ips * 2)); } -int s5p_sysmmu_set_tablebase_pgd(sysmmu_ips ips, unsigned long pgd) +static inline int is_sysmmu_active(sysmmu_ips ips) { - 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); + return sysmmu_states & (3 << (ips * 2)); +} - if (s5p_sysmmu_tlb_invalidate(ips) != 0) - printk(KERN_ERR "failed s5p_sysmmu_tlb_invalidate\n"); +static void __iomem *sysmmusfrs[S5P_SYSMMU_TOTAL_IPNUM]; - return 0; +static inline void sysmmu_block(sysmmu_ips ips) +{ + __raw_writel(CTRL_BLOCK, sysmmusfrs[ips] + S5P_MMU_CTRL); + dev_dbg(dev, "%s is blocked.\n", sysmmu_ips_name[ips]); } -static int s5p_sysmmu_set_tablebase(sysmmu_ips ips) +static inline void sysmmu_unblock(sysmmu_ips ips) { - unsigned int pg; - struct sysmmu_controller *sysmmuconp; + __raw_writel(CTRL_ENABLE, sysmmusfrs[ips] + S5P_MMU_CTRL); + dev_dbg(dev, "%s is unblocked.\n", sysmmu_ips_name[ips]); +} - sysmmuconp = &s5p_sysmmu_cntlrs[ips]; +static inline void __sysmmu_tlb_invalidate(sysmmu_ips ips) +{ + __raw_writel(0x1, sysmmusfrs[ips] + S5P_MMU_FLUSH); + dev_dbg(dev, "TLB of %s is invalidated.\n", sysmmu_ips_name[ips]); +} - if (sysmmuconp == NULL) { - printk(KERN_ERR "failed to get ip's sysmmu info\n"); - return 1; +static inline void __sysmmu_set_ptbase(sysmmu_ips ips, unsigned long pgd) +{ + if (unlikely(pgd == 0)) { + pgd = (unsigned long)ZERO_PAGE(0); + __raw_writel(0x20, sysmmusfrs[ips] + S5P_MMU_CFG); /* 4KB LV1 */ + } else { + __raw_writel(0x0, sysmmusfrs[ips] + S5P_MMU_CFG); /* 16KB LV1 */ } - __asm__("mrc p15, 0, %0, c2, c0, 0" \ - : "=r" (pg) : : "cc"); \ - pg &= ~0x3fff; - - printk(KERN_INFO "%s: CP15 TTBR0 : 0x%x\n", __func__, pg); + __raw_writel(pgd, sysmmusfrs[ips] + S5P_PT_BASE_ADDR); - /* Set sysmmu page table base address */ - __raw_writel(pg, sysmmuconp->regs + S5P_PT_BASE_ADDR); + dev_dbg(dev, "Page table base of %s is initialized with 0x%08lX.\n", + sysmmu_ips_name[ips], pgd); + __sysmmu_tlb_invalidate(ips); +} - return 0; +void sysmmu_set_fault_handler(sysmmu_ips ips, + int (*handler)(enum S5P_SYSMMU_INTERRUPT_TYPE itype, + unsigned long pgtable_base, + unsigned long fault_addr)) +{ + BUG_ON(!((ips >= SYSMMU_MDMA) && (ips < S5P_SYSMMU_TOTAL_IPNUM))); + fault_handlers[ips] = handler; } -int s5p_sysmmu_enable(sysmmu_ips ips) +static irqreturn_t s5p_sysmmu_irq(int irq, void *dev_id) { - unsigned int reg; + /* SYSMMU is in blocked when interrupt occurred. */ + unsigned long base = 0; + sysmmu_ips ips = (sysmmu_ips)dev_id; + enum S5P_SYSMMU_INTERRUPT_TYPE itype; - struct sysmmu_controller *sysmmuconp; + itype = (enum S5P_SYSMMU_INTERRUPT_TYPE) + __ffs(__raw_readl(sysmmusfrs[ips] + S5P_INT_STATUS)); - sysmmuconp = &s5p_sysmmu_cntlrs[ips]; + BUG_ON(!((itype >= 0) && (itype < 8))); - if (sysmmuconp == NULL) { - printk(KERN_ERR "failed to get ip's sysmmu info\n"); - return 1; - } + dev_alert(dev, "%s occurred by %s.\n", sysmmu_fault_name[itype], + sysmmu_ips_name[ips]); - s5p_sysmmu_set_tablebase(ips); + if (fault_handlers[ips]) { + unsigned long addr; - /* replacement policy : LRU */ - reg = __raw_readl(sysmmuconp->regs + S5P_MMU_CFG); - reg |= 0x1; - __raw_writel(reg, sysmmuconp->regs + S5P_MMU_CFG); + base = __raw_readl(sysmmusfrs[ips] + S5P_PT_BASE_ADDR); + addr = __raw_readl(sysmmusfrs[ips] + fault_reg_offset[itype]); - /* Enable interrupt, Enable MMU */ - reg = __raw_readl(sysmmuconp->regs + S5P_MMU_CTRL); - reg |= (0x1 << 2) | (0x1 << 0); + if (fault_handlers[ips](itype, base, addr)) { + __raw_writel(1 << itype, + sysmmusfrs[ips] + S5P_INT_CLEAR); + dev_notice(dev, "%s from %s is resolved." + " Retrying translation.\n", + sysmmu_fault_name[itype], sysmmu_ips_name[ips]); + } else { + base = 0; + } + } - __raw_writel(reg, sysmmuconp->regs + S5P_MMU_CTRL); + sysmmu_unblock(ips); - sysmmuconp->enable = true; + if (!base) + dev_notice(dev, "%s from %s is not handled.\n", + sysmmu_fault_name[itype], sysmmu_ips_name[ips]); - return 0; + return IRQ_HANDLED; } -int s5p_sysmmu_disable(sysmmu_ips ips) +void s5p_sysmmu_set_tablebase_pgd(sysmmu_ips ips, unsigned long pgd) { - 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; + if (is_sysmmu_active(ips)) { + sysmmu_block(ips); + __sysmmu_set_ptbase(ips, pgd); + sysmmu_unblock(ips); + } else { + dev_dbg(dev, "%s is disabled. " + "Skipping initializing page table base.\n", + sysmmu_ips_name[ips]); } - - 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) +void s5p_sysmmu_enable(sysmmu_ips ips, unsigned long pgd) { - unsigned int reg; - struct sysmmu_controller *sysmmuconp = NULL; + if (!is_sysmmu_active(ips)) { + __sysmmu_set_ptbase(ips, pgd); - sysmmuconp = &s5p_sysmmu_cntlrs[ips]; + __raw_writel(CTRL_ENABLE, sysmmusfrs[ips] + S5P_MMU_CTRL); - if (sysmmuconp == NULL) { - printk(KERN_ERR "failed to get ip's sysmmu info\n"); - return 1; + set_sysmmu_active(ips); + dev_dbg(dev, "%s is enabled.\n", sysmmu_ips_name[ips]); + } else { + dev_dbg(dev, "%s is already enabled.\n", sysmmu_ips_name[ips]); } +} - /* 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); +void s5p_sysmmu_disable(sysmmu_ips ips) +{ + if (is_sysmmu_active(ips)) { + __raw_writel(CTRL_DISABLE, sysmmusfrs[ips] + S5P_MMU_CTRL); + set_sysmmu_inactive(ips); + dev_dbg(dev, "%s is disabled.\n", sysmmu_ips_name[ips]); + } else { + dev_dbg(dev, "%s is already disabled.\n", sysmmu_ips_name[ips]); + } +} - return 0; +void s5p_sysmmu_tlb_invalidate(sysmmu_ips ips) +{ + if (is_sysmmu_active(ips)) { + sysmmu_block(ips); + __sysmmu_tlb_invalidate(ips); + sysmmu_unblock(ips); + } else { + dev_dbg(dev, "%s is disabled. " + "Skipping invalidating TLB.\n", sysmmu_ips_name[ips]); + } } static int s5p_sysmmu_probe(struct platform_device *pdev) { - int i; - int ret; - struct resource *res; - struct sysmmu_controller *sysmmuconp; - sysmmu_ips ips; + int i, ret; + struct resource *res, *mem; - 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; - } + dev = &pdev->dev; - sysmmuconp->name = sysmmu_ips_name[i]; + for (i = 0; i < S5P_SYSMMU_TOTAL_IPNUM; i++) { + int irq; res = platform_get_resource(pdev, IORESOURCE_MEM, i); if (!res) { - printk(KERN_ERR "failed to get sysmmu resource\n"); + dev_err(dev, "Failed to get the resource of %s.\n", + sysmmu_ips_name[i]); ret = -ENODEV; goto err_res; } - sysmmuconp->mem = request_mem_region(res->start, + 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"); + if (!mem) { + dev_err(dev, "Failed to request the memory region of %s.\n", + sysmmu_ips_name[i]); 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"); + sysmmusfrs[i] = ioremap(res->start, res->end - res->start + 1); + if (!sysmmusfrs[i]) { + dev_err(dev, "Failed to ioremap() for %s.\n", + sysmmu_ips_name[i]); 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"); + irq = platform_get_irq(pdev, i); + if (irq <= 0) { + dev_err(dev, "Failed to get the IRQ resource of %s.\n", + sysmmu_ips_name[i]); 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"); + if (request_irq(irq, s5p_sysmmu_irq, IRQF_DISABLED, + pdev->name, (void *)i)) { + dev_err(dev, "Failed to request IRQ for %s.\n", + sysmmu_ips_name[i]); 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); + iounmap(sysmmusfrs[i]); +err_reg: + release_mem_region(mem->start, resource_size(mem)); err_res: return ret; } |
