The structure 'arch_mmu' accommodates the difference between omap1 and
omap2/3.
This patch provides omap2/3 specific functions and its registration.
Signed-off-by: Hiroshi DOYU <Hiroshi.DOYU@xxxxxxxxx>
---
arch/arm/mach-omap2/Makefile | 2 +
arch/arm/mach-omap2/iommu_omap2.c | 379 ++++++++++++++++++++++++++++++
arch/arm/plat-omap/include/mach/iommu2.h | 92 +++++++
3 files changed, 473 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/mach-omap2/iommu_omap2.c
create mode 100644 arch/arm/plat-omap/include/mach/iommu2.h
diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile
index b59555d..c54ca0a 100644
--- a/arch/arm/mach-omap2/Makefile
+++ b/arch/arm/mach-omap2/Makefile
@@ -41,6 +41,8 @@ obj-$(CONFIG_OMAP_MBOX_FWK) += mailbox_mach.o
mailbox_mach-objs := mailbox.o
mmu_mach-objs := mmu.o
+obj-$(CONFIG_OMAP_IOMMU) += iommu_omap2.o
+
# Specific board support
obj-$(CONFIG_MACH_OMAP_GENERIC) += board-generic.o
obj-$(CONFIG_MACH_OMAP_H4) += board-h4.o board-h4-mmc.o
diff --git a/arch/arm/mach-omap2/iommu_omap2.c b/arch/arm/mach-omap2/iommu_omap2.c
new file mode 100644
index 0000000..848b782
--- /dev/null
+++ b/arch/arm/mach-omap2/iommu_omap2.c
@@ -0,0 +1,379 @@
+/*
+ * omap iommu: omap2 architecture specific functions
+ *
+ * Copyright (C) 2008 Nokia Corporation
+ *
+ * Written by Hiroshi DOYU <Hiroshi.DOYU@xxxxxxxxx>,
+ * 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/io.h>
+#include <linux/mm.h>
+#include <linux/jiffies.h>
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/clk.h>
+#include <linux/stringify.h>
+#include <linux/platform_device.h>
+
+#include <mach/iommu.h>
+#include <mach/iommu2.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_MASK \
+ (MMU_IRQ_MULTIHITFAULT | MMU_IRQ_TABLEWALKFAULT | MMU_IRQ_EMUMISS | \
+ MMU_IRQ_TRANSLATIONFAULT)
+
+/* 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)
+
+#if defined(CONFIG_ARCH_OMAP3)
+
+#define OMAP2_MMU_REG_SIZE 256
+
+/* Camera ISP MMU */
+#define OMAP2_MMU1_BASE 0x480bd400
+#define OMAP2_MMU1_IRQ 24
+
+/* IVA2.2 MMU */
+#define OMAP2_MMU2_BASE 0x5d000000
+#define OMAP2_MMU2_IRQ 28
+
+static struct resource iommu1_res[] = { /* Camera ISP MMU */
+ {
+ .start = OMAP2_MMU1_BASE,
+ .end = OMAP2_MMU1_BASE + OMAP2_MMU_REG_SIZE - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = OMAP2_MMU1_IRQ,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct resource iommu2_res[] = { /* IVA2.2 MMU */
+ {
+ .start = OMAP2_MMU2_BASE,
+ .end = OMAP2_MMU2_BASE + OMAP2_MMU_REG_SIZE - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = OMAP2_MMU2_IRQ,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct iommu_platform_data omap2_iommu_platform_data[] = {
+ {
+ .name = "isp",
+ .nr_tlb_entries = 8,
+ .clk_name = "cam_ick",
+ .res = iommu1_res,
+ .n_res = ARRAY_SIZE(iommu1_res),
+ },
+ {
+ .name = "iva2",
+ .nr_tlb_entries = 32,
+ .clk_name = "iva2_ck",
+ .res = iommu2_res,
+ .n_res = ARRAY_SIZE(iommu2_res),
+ },
+};
+#else
+static struct iommu_platform_data omap2_iommu_platform_data[];
+#endif /* CONFIG_ARCH_OMAP3 */
+
+static int __init iommu_device_init(void)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(omap2_iommu_platform_data); i++) {
+ int err;
+ struct platform_device *new;
+ struct iommu_platform_data *p = &omap2_iommu_platform_data[i];
+
+ new = platform_device_alloc("omap-iommu", i + 1);
+ if (!new)
+ continue;
+ new->num_resources = p->n_res;
+ new->resource = p->res;
+ new->dev.platform_data = p;
+ err = platform_device_add(new);
+ if (err) {
+ platform_device_put(new);
+ continue;
+ }
+
+ p->clk = clk_get(NULL, p->clk_name);
+ BUG_ON(IS_ERR(p->clk));
+ }
+ return 0;
+}
+
+static int omap2_iommu_enable(struct 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;
+ iommu_write_reg(obj, l, MMU_SYSCONFIG);
+
+ iommu_write_reg(obj, MMU_IRQ_MASK, MMU_IRQENABLE);
+ iommu_write_reg(obj, pa, MMU_TTB);
+
+ l = iommu_read_reg(obj, MMU_CNTL);
+ l &= ~MMU_CNTL_MASK;
+ l |= MMU_CNTL_MMU_EN | MMU_CNTL_TWL_EN;
+ iommu_write_reg(obj, l, MMU_CNTL);
+
+ return 0;
+}
+
+static void omap2_iommu_disable(struct 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 u32 omap2_iommu_fault_isr(struct iommu *obj, u32 *ra)
+{
+ int i;
+ u32 stat, da;
+ const char *err_msg[] =
+ {"tlb miss", "translation fault", "emulation miss",
+ "table walk fault", "multi hit fault", };
+
+ stat = iommu_read_reg(obj, MMU_IRQSTATUS);
+ stat &= MMU_IRQ_MASK;
+ if (!stat)
+ return 0;
+
+ da = iommu_read_reg(obj, MMU_FAULT_AD);
+ *ra = da;
+
+ dev_err(obj->dev, "%s:\tda:%08x ", __func__, da);
+
+ for (i = 0; i < ARRAY_SIZE(err_msg); i++) {
+ if (stat & (1 << i))
+ pr_err("%s", err_msg[i]);
+ }
+ pr_err("\n");
+
+ iommu_write_reg(obj, stat, MMU_IRQSTATUS);
+ return stat;
+}
+
+static void omap2_tlb_read_cr(struct 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 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 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;
+ cr->ram = e->pa | e->endian | e->elsz;
+
+ return cr;
+}
+
+static inline int omap2_cr_valid(struct cr_regs *cr)
+{
+ return cr->cam & MMU_CAM_V;
+}
+
+static pgprot_t 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) ? 0 : 6);
+
+ return attr;
+}
+
+static ssize_t omap2_dump_cr(struct iommu *obj, struct cr_regs *cr, char *buf)
+{
+ char *p = buf;
+
+ /* FIXME: Need more detail analysis of cam/ram */
+ p += sprintf(p, "%08x %08x\n", cr->cam, cr->ram);
+
+ return p - buf;
+}
+
+#ifdef DEBUG
+#define pr_reg(name) \
+ p += sprintf(p, "%20s: %08lx\n", \
+ __stringify(name), iommu_read_reg(obj, MMU_##name));
+
+static ssize_t omap2_dump_regs(struct iommu *obj, char *buf)
+{
+ 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);
+
+ return p - buf;
+}
+#else
+#define omap2_dump_regs NULL
+#endif /* DEBUG */
+
+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,
+ .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,
+
+ .dump_regs = omap2_dump_regs,
+};
+
+static int __init omap2_iommu_init(void)
+{
+ iommu_set_arch(&omap2_iommu_ops);
+
+ return iommu_device_init();
+}
+module_init(omap2_iommu_init);
+
+MODULE_AUTHOR("Hiroshi DOYU, Paul Mundt and Toshihiro Kobayashi");
+MODULE_DESCRIPTION("omap iommu: omap2 architecture specific functions");
+MODULE_LICENSE("GPL v2");
diff --git a/arch/arm/plat-omap/include/mach/iommu2.h b/arch/arm/plat-omap/include/mach/iommu2.h
new file mode 100644
index 0000000..ad2bb5b
--- /dev/null
+++ b/arch/arm/plat-omap/include/mach/iommu2.h
@@ -0,0 +1,92 @@
+/*
+ * omap iommu: omap2 architecture specific definitions
+ *
+ * Copyright (C) 2008 Nokia Corporation
+ *
+ * Written by Hiroshi DOYU <Hiroshi.DOYU@xxxxxxxxx>
+ *
+ * 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 __MACH_IOMMU2_H
+#define __MACH_IOMMU2_H
+
+/*
+ * MMU Register offsets
+ */
+#define MMU_REVISION 0x00
+#define MMU_SYSCONFIG 0x10
+#define MMU_SYSSTATUS 0x14
+#define MMU_IRQSTATUS 0x18
+#define MMU_IRQENABLE 0x1c
+#define MMU_WALKING_ST 0x40
+#define MMU_CNTL 0x44
+#define MMU_FAULT_AD 0x48
+#define MMU_TTB 0x4c
+#define MMU_LOCK 0x50
+#define MMU_LD_TLB 0x54
+#define MMU_CAM 0x58
+#define MMU_RAM 0x5c
+#define MMU_GFLUSH 0x60
+#define MMU_FLUSH_ENTRY 0x64
+#define MMU_READ_CAM 0x68
+#define MMU_READ_RAM 0x6c
+#define MMU_EMU_FAULT_AD 0x70
+
+/*
+ * MMU Register bit definitions
+ */
+#define MMU_LOCK_BASE_SHIFT 10
+#define MMU_LOCK_BASE_MASK (0x1f << MMU_LOCK_BASE_SHIFT)
+#define MMU_LOCK_BASE(x) \
+ ((x & MMU_LOCK_BASE_MASK) >> MMU_LOCK_BASE_SHIFT)
+
+#define MMU_LOCK_VICT_SHIFT 4
+#define MMU_LOCK_VICT_MASK (0x1f << MMU_LOCK_VICT_SHIFT)
+#define MMU_LOCK_VICT(x) \
+ ((x & MMU_LOCK_VICT_MASK) >> MMU_LOCK_VICT_SHIFT)
+
+#define MMU_CAM_VATAG_SHIFT 12
+#define MMU_CAM_VATAG_MASK \
+ ((~0UL >> MMU_CAM_VATAG_SHIFT) << MMU_CAM_VATAG_SHIFT)
+#define MMU_CAM_P (1 << 3)
+#define MMU_CAM_V (1 << 2)
+#define MMU_CAM_PGSZ_MASK 3
+#define MMU_CAM_PGSZ_1M (0 << 0)
+#define MMU_CAM_PGSZ_64K (1 << 0)
+#define MMU_CAM_PGSZ_4K (2 << 0)
+#define MMU_CAM_PGSZ_16M (3 << 0)
+
+#define MMU_RAM_PADDR_SHIFT 12
+#define MMU_RAM_PADDR_MASK \
+ ((~0UL >> MMU_RAM_PADDR_SHIFT) << MMU_RAM_PADDR_SHIFT)
+#define MMU_RAM_ENDIAN_SHIFT 9
+#define MMU_RAM_ENDIAN_MASK (1 << MMU_RAM_ENDIAN_SHIFT)
+#define MMU_RAM_ENDIAN_BIG (1 << MMU_RAM_ENDIAN_SHIFT)
+#define MMU_RAM_ENDIAN_LITTLE (0 << MMU_RAM_ENDIAN_SHIFT)
+#define MMU_RAM_ELSZ_SHIFT 7
+#define MMU_RAM_ELSZ_MASK (3 << MMU_RAM_ELSZ_SHIFT)
+#define MMU_RAM_ELSZ_8 (0 << MMU_RAM_ELSZ_SHIFT)
+#define MMU_RAM_ELSZ_16 (1 << MMU_RAM_ELSZ_SHIFT)
+#define MMU_RAM_ELSZ_32 (2 << MMU_RAM_ELSZ_SHIFT)
+#define MMU_RAM_ELSZ_NONE (3 << MMU_RAM_ELSZ_SHIFT)
+#define MMU_RAM_MIXED_SHIFT 6
+#define MMU_RAM_MIXED_MASK (1 << MMU_RAM_MIXED_SHIFT)
+#define MMU_RAM_MIXED MMU_RAM_MIXED_MASK
+
+/*
+ * register accessors
+ */
+static inline u32 iommu_read_reg(struct iommu *obj, size_t offs)
+{
+ return __raw_readl(obj->regbase + offs);
+}
+
+static inline void iommu_write_reg(struct iommu *obj, u32 val, size_t offs)
+{
+ __raw_writel(val, obj->regbase + offs);
+}
+
+#endif /* __MACH_IOMMU2_H */
--
1.6.0.3.613.g9f8f13
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