summaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-omap2/iommu2.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/mach-omap2/iommu2.c')
-rw-r--r--arch/arm/mach-omap2/iommu2.c361
1 files changed, 0 insertions, 361 deletions
diff --git a/arch/arm/mach-omap2/iommu2.c b/arch/arm/mach-omap2/iommu2.c
deleted file mode 100644
index eefc379..0000000
--- a/arch/arm/mach-omap2/iommu2.c
+++ /dev/null
@@ -1,361 +0,0 @@
-/*
- * omap iommu: omap2/3 architecture specific functions
- *
- * Copyright (C) 2008-2009 Nokia Corporation
- *
- * Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.com>,
- * Paul Mundt and Toshihiro Kobayashi
- *
- * 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/err.h>
-#include <linux/device.h>
-#include <linux/jiffies.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/stringify.h>
-
-#include <plat/iommu.h>
-
-/*
- * omap2 architecture specific register bit definitions
- */
-#define IOMMU_ARCH_VERSION 0x00000011
-
-/* SYSCONF */
-#define MMU_SYS_IDLE_SHIFT 3
-#define MMU_SYS_IDLE_FORCE (0 << MMU_SYS_IDLE_SHIFT)
-#define MMU_SYS_IDLE_NONE (1 << MMU_SYS_IDLE_SHIFT)
-#define MMU_SYS_IDLE_SMART (2 << MMU_SYS_IDLE_SHIFT)
-#define MMU_SYS_IDLE_MASK (3 << MMU_SYS_IDLE_SHIFT)
-
-#define MMU_SYS_SOFTRESET (1 << 1)
-#define MMU_SYS_AUTOIDLE 1
-
-/* SYSSTATUS */
-#define MMU_SYS_RESETDONE 1
-
-/* IRQSTATUS & IRQENABLE */
-#define MMU_IRQ_MULTIHITFAULT (1 << 4)
-#define MMU_IRQ_TABLEWALKFAULT (1 << 3)
-#define MMU_IRQ_EMUMISS (1 << 2)
-#define MMU_IRQ_TRANSLATIONFAULT (1 << 1)
-#define MMU_IRQ_TLBMISS (1 << 0)
-
-#define __MMU_IRQ_FAULT \
- (MMU_IRQ_MULTIHITFAULT | MMU_IRQ_EMUMISS | MMU_IRQ_TRANSLATIONFAULT)
-#define MMU_IRQ_MASK \
- (__MMU_IRQ_FAULT | MMU_IRQ_TABLEWALKFAULT | MMU_IRQ_TLBMISS)
-#define MMU_IRQ_TWL_MASK (__MMU_IRQ_FAULT | MMU_IRQ_TABLEWALKFAULT)
-#define MMU_IRQ_TLB_MISS_MASK (__MMU_IRQ_FAULT | MMU_IRQ_TLBMISS)
-
-/* MMU_CNTL */
-#define MMU_CNTL_SHIFT 1
-#define MMU_CNTL_MASK (7 << MMU_CNTL_SHIFT)
-#define MMU_CNTL_EML_TLB (1 << 3)
-#define MMU_CNTL_TWL_EN (1 << 2)
-#define MMU_CNTL_MMU_EN (1 << 1)
-
-#define get_cam_va_mask(pgsz) \
- (((pgsz) == MMU_CAM_PGSZ_16M) ? 0xff000000 : \
- ((pgsz) == MMU_CAM_PGSZ_1M) ? 0xfff00000 : \
- ((pgsz) == MMU_CAM_PGSZ_64K) ? 0xffff0000 : \
- ((pgsz) == MMU_CAM_PGSZ_4K) ? 0xfffff000 : 0)
-
-
-static void __iommu_set_twl(struct omap_iommu *obj, bool on)
-{
- u32 l = iommu_read_reg(obj, MMU_CNTL);
-
- if (on)
- iommu_write_reg(obj, MMU_IRQ_TWL_MASK, MMU_IRQENABLE);
- else
- iommu_write_reg(obj, MMU_IRQ_TLB_MISS_MASK, MMU_IRQENABLE);
-
- l &= ~MMU_CNTL_MASK;
- if (on)
- l |= (MMU_CNTL_MMU_EN | MMU_CNTL_TWL_EN);
- else
- l |= (MMU_CNTL_MMU_EN);
-
- iommu_write_reg(obj, l, MMU_CNTL);
-}
-
-
-static int omap2_iommu_enable(struct omap_iommu *obj)
-{
- u32 l, pa;
- unsigned long timeout;
-
- if (!obj->iopgd || !IS_ALIGNED((u32)obj->iopgd, SZ_16K))
- return -EINVAL;
-
- pa = virt_to_phys(obj->iopgd);
- if (!IS_ALIGNED(pa, SZ_16K))
- return -EINVAL;
-
- iommu_write_reg(obj, MMU_SYS_SOFTRESET, MMU_SYSCONFIG);
-
- timeout = jiffies + msecs_to_jiffies(20);
- do {
- l = iommu_read_reg(obj, MMU_SYSSTATUS);
- if (l & MMU_SYS_RESETDONE)
- break;
- } while (!time_after(jiffies, timeout));
-
- if (!(l & MMU_SYS_RESETDONE)) {
- dev_err(obj->dev, "can't take mmu out of reset\n");
- return -ENODEV;
- }
-
- l = iommu_read_reg(obj, MMU_REVISION);
- dev_info(obj->dev, "%s: version %d.%d\n", obj->name,
- (l >> 4) & 0xf, l & 0xf);
-
- l = iommu_read_reg(obj, MMU_SYSCONFIG);
- l &= ~MMU_SYS_IDLE_MASK;
- l |= (MMU_SYS_IDLE_SMART | MMU_SYS_AUTOIDLE);
- iommu_write_reg(obj, l, MMU_SYSCONFIG);
-
- iommu_write_reg(obj, pa, MMU_TTB);
-
- __iommu_set_twl(obj, true);
-
- return 0;
-}
-
-static void omap2_iommu_disable(struct omap_iommu *obj)
-{
- u32 l = iommu_read_reg(obj, MMU_CNTL);
-
- l &= ~MMU_CNTL_MASK;
- iommu_write_reg(obj, l, MMU_CNTL);
- iommu_write_reg(obj, MMU_SYS_IDLE_FORCE, MMU_SYSCONFIG);
-
- dev_dbg(obj->dev, "%s is shutting down\n", obj->name);
-}
-
-static void omap2_iommu_set_twl(struct omap_iommu *obj, bool on)
-{
- __iommu_set_twl(obj, false);
-}
-
-static u32 omap2_iommu_fault_isr(struct omap_iommu *obj, u32 *ra)
-{
- u32 stat, da;
- u32 errs = 0;
-
- stat = iommu_read_reg(obj, MMU_IRQSTATUS);
- stat &= MMU_IRQ_MASK;
- if (!stat) {
- *ra = 0;
- return 0;
- }
-
- da = iommu_read_reg(obj, MMU_FAULT_AD);
- *ra = da;
-
- if (stat & MMU_IRQ_TLBMISS)
- errs |= OMAP_IOMMU_ERR_TLB_MISS;
- if (stat & MMU_IRQ_TRANSLATIONFAULT)
- errs |= OMAP_IOMMU_ERR_TRANS_FAULT;
- if (stat & MMU_IRQ_EMUMISS)
- errs |= OMAP_IOMMU_ERR_EMU_MISS;
- if (stat & MMU_IRQ_TABLEWALKFAULT)
- errs |= OMAP_IOMMU_ERR_TBLWALK_FAULT;
- if (stat & MMU_IRQ_MULTIHITFAULT)
- errs |= OMAP_IOMMU_ERR_MULTIHIT_FAULT;
- iommu_write_reg(obj, stat, MMU_IRQSTATUS);
-
- return errs;
-}
-
-static void omap2_tlb_read_cr(struct omap_iommu *obj, struct cr_regs *cr)
-{
- cr->cam = iommu_read_reg(obj, MMU_READ_CAM);
- cr->ram = iommu_read_reg(obj, MMU_READ_RAM);
-}
-
-static void omap2_tlb_load_cr(struct omap_iommu *obj, struct cr_regs *cr)
-{
- iommu_write_reg(obj, cr->cam | MMU_CAM_V, MMU_CAM);
- iommu_write_reg(obj, cr->ram, MMU_RAM);
-}
-
-static u32 omap2_cr_to_virt(struct cr_regs *cr)
-{
- u32 page_size = cr->cam & MMU_CAM_PGSZ_MASK;
- u32 mask = get_cam_va_mask(cr->cam & page_size);
-
- return cr->cam & mask;
-}
-
-static struct cr_regs *omap2_alloc_cr(struct omap_iommu *obj,
- struct iotlb_entry *e)
-{
- struct cr_regs *cr;
-
- if (e->da & ~(get_cam_va_mask(e->pgsz))) {
- dev_err(obj->dev, "%s:\twrong alignment: %08x\n", __func__,
- e->da);
- return ERR_PTR(-EINVAL);
- }
-
- cr = kmalloc(sizeof(*cr), GFP_KERNEL);
- if (!cr)
- return ERR_PTR(-ENOMEM);
-
- cr->cam = (e->da & MMU_CAM_VATAG_MASK) | e->prsvd | e->pgsz | e->valid;
- cr->ram = e->pa | e->endian | e->elsz | e->mixed;
-
- return cr;
-}
-
-static inline int omap2_cr_valid(struct cr_regs *cr)
-{
- return cr->cam & MMU_CAM_V;
-}
-
-static u32 omap2_get_pte_attr(struct iotlb_entry *e)
-{
- u32 attr;
-
- attr = e->mixed << 5;
- attr |= e->endian;
- attr |= e->elsz >> 3;
- attr <<= (((e->pgsz == MMU_CAM_PGSZ_4K) ||
- (e->pgsz == MMU_CAM_PGSZ_64K)) ? 0 : 6);
- return attr;
-}
-
-static ssize_t
-omap2_dump_cr(struct omap_iommu *obj, struct cr_regs *cr, char *buf)
-{
- char *p = buf;
-
- /* FIXME: Need more detail analysis of cam/ram */
- p += sprintf(p, "%08x %08x %01x\n", cr->cam, cr->ram,
- (cr->cam & MMU_CAM_P) ? 1 : 0);
-
- return p - buf;
-}
-
-#define pr_reg(name) \
- do { \
- ssize_t bytes; \
- const char *str = "%20s: %08x\n"; \
- const int maxcol = 32; \
- bytes = snprintf(p, maxcol, str, __stringify(name), \
- iommu_read_reg(obj, MMU_##name)); \
- p += bytes; \
- len -= bytes; \
- if (len < maxcol) \
- goto out; \
- } while (0)
-
-static ssize_t
-omap2_iommu_dump_ctx(struct omap_iommu *obj, char *buf, ssize_t len)
-{
- char *p = buf;
-
- pr_reg(REVISION);
- pr_reg(SYSCONFIG);
- pr_reg(SYSSTATUS);
- pr_reg(IRQSTATUS);
- pr_reg(IRQENABLE);
- pr_reg(WALKING_ST);
- pr_reg(CNTL);
- pr_reg(FAULT_AD);
- pr_reg(TTB);
- pr_reg(LOCK);
- pr_reg(LD_TLB);
- pr_reg(CAM);
- pr_reg(RAM);
- pr_reg(GFLUSH);
- pr_reg(FLUSH_ENTRY);
- pr_reg(READ_CAM);
- pr_reg(READ_RAM);
- pr_reg(EMU_FAULT_AD);
-out:
- return p - buf;
-}
-
-static void omap2_iommu_save_ctx(struct omap_iommu *obj)
-{
- int i;
- u32 *p = obj->ctx;
-
- for (i = 0; i < (MMU_REG_SIZE / sizeof(u32)); i++) {
- p[i] = iommu_read_reg(obj, i * sizeof(u32));
- dev_dbg(obj->dev, "%s\t[%02d] %08x\n", __func__, i, p[i]);
- }
-
- BUG_ON(p[0] != IOMMU_ARCH_VERSION);
-}
-
-static void omap2_iommu_restore_ctx(struct omap_iommu *obj)
-{
- int i;
- u32 *p = obj->ctx;
-
- for (i = 0; i < (MMU_REG_SIZE / sizeof(u32)); i++) {
- iommu_write_reg(obj, p[i], i * sizeof(u32));
- dev_dbg(obj->dev, "%s\t[%02d] %08x\n", __func__, i, p[i]);
- }
-
- BUG_ON(p[0] != IOMMU_ARCH_VERSION);
-}
-
-static void omap2_cr_to_e(struct cr_regs *cr, struct iotlb_entry *e)
-{
- e->da = cr->cam & MMU_CAM_VATAG_MASK;
- e->pa = cr->ram & MMU_RAM_PADDR_MASK;
- e->valid = cr->cam & MMU_CAM_V;
- e->pgsz = cr->cam & MMU_CAM_PGSZ_MASK;
- e->endian = cr->ram & MMU_RAM_ENDIAN_MASK;
- e->elsz = cr->ram & MMU_RAM_ELSZ_MASK;
- e->mixed = cr->ram & MMU_RAM_MIXED;
-}
-
-static const struct iommu_functions omap2_iommu_ops = {
- .version = IOMMU_ARCH_VERSION,
-
- .enable = omap2_iommu_enable,
- .disable = omap2_iommu_disable,
- .set_twl = omap2_iommu_set_twl,
- .fault_isr = omap2_iommu_fault_isr,
-
- .tlb_read_cr = omap2_tlb_read_cr,
- .tlb_load_cr = omap2_tlb_load_cr,
-
- .cr_to_e = omap2_cr_to_e,
- .cr_to_virt = omap2_cr_to_virt,
- .alloc_cr = omap2_alloc_cr,
- .cr_valid = omap2_cr_valid,
- .dump_cr = omap2_dump_cr,
-
- .get_pte_attr = omap2_get_pte_attr,
-
- .save_ctx = omap2_iommu_save_ctx,
- .restore_ctx = omap2_iommu_restore_ctx,
- .dump_ctx = omap2_iommu_dump_ctx,
-};
-
-static int __init omap2_iommu_init(void)
-{
- return omap_install_iommu_arch(&omap2_iommu_ops);
-}
-module_init(omap2_iommu_init);
-
-static void __exit omap2_iommu_exit(void)
-{
- omap_uninstall_iommu_arch(&omap2_iommu_ops);
-}
-module_exit(omap2_iommu_exit);
-
-MODULE_AUTHOR("Hiroshi DOYU, Paul Mundt and Toshihiro Kobayashi");
-MODULE_DESCRIPTION("omap iommu: omap2/3 architecture specific functions");
-MODULE_LICENSE("GPL v2");
OpenPOWER on IntegriCloud