aboutsummaryrefslogtreecommitdiffstats
path: root/meta/recipes-kernel/linux/linux-omap-2.6.29/isp/iommu/0002-omap-iommu-omap2-architecture-specific-functions.patch
diff options
context:
space:
mode:
Diffstat (limited to 'meta/recipes-kernel/linux/linux-omap-2.6.29/isp/iommu/0002-omap-iommu-omap2-architecture-specific-functions.patch')
-rw-r--r--meta/recipes-kernel/linux/linux-omap-2.6.29/isp/iommu/0002-omap-iommu-omap2-architecture-specific-functions.patch453
1 files changed, 453 insertions, 0 deletions
diff --git a/meta/recipes-kernel/linux/linux-omap-2.6.29/isp/iommu/0002-omap-iommu-omap2-architecture-specific-functions.patch b/meta/recipes-kernel/linux/linux-omap-2.6.29/isp/iommu/0002-omap-iommu-omap2-architecture-specific-functions.patch
new file mode 100644
index 0000000000..d5f78dd14e
--- /dev/null
+++ b/meta/recipes-kernel/linux/linux-omap-2.6.29/isp/iommu/0002-omap-iommu-omap2-architecture-specific-functions.patch
@@ -0,0 +1,453 @@
+From c79d7959c45f40e47520aa6acd54c19094754787 Mon Sep 17 00:00:00 2001
+From: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
+Date: Mon, 26 Jan 2009 15:13:45 +0200
+Subject: [PATCH] omap iommu: omap2 architecture specific functions
+
+The structure 'arch_mmu' accommodates the difference between omap1 and
+omap2/3.
+
+This patch provides omap2/3 specific functions
+
+Signed-off-by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
+---
+ arch/arm/mach-omap2/iommu2.c | 326 ++++++++++++++++++++++++++++++
+ arch/arm/plat-omap/include/mach/iommu2.h | 94 +++++++++
+ 2 files changed, 420 insertions(+), 0 deletions(-)
+ create mode 100644 arch/arm/mach-omap2/iommu2.c
+ create mode 100644 arch/arm/plat-omap/include/mach/iommu2.h
+
+diff --git a/arch/arm/mach-omap2/iommu2.c b/arch/arm/mach-omap2/iommu2.c
+new file mode 100644
+index 0000000..88a44f1
+--- /dev/null
++++ b/arch/arm/mach-omap2/iommu2.c
+@@ -0,0 +1,326 @@
++/*
++ * 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/stringify.h>
++
++#include <asm/io.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)
++
++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 | MMU_SYS_AUTOIDLE);
++ 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))
++ printk("%s ", err_msg[i]);
++ }
++ printk("\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 | 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) ? 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;
++}
++
++#define pr_reg(name) \
++ p += sprintf(p, "%20s: %08x\n", \
++ __stringify(name), iommu_read_reg(obj, MMU_##name));
++
++static ssize_t omap2_iommu_dump_ctx(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;
++}
++
++static void omap2_iommu_save_ctx(struct 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 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,
++ .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 install_iommu_arch(&omap2_iommu_ops);
++}
++module_init(omap2_iommu_init);
++
++static void __exit omap2_iommu_exit(void)
++{
++ 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");
+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..d746047
+--- /dev/null
++++ b/arch/arm/plat-omap/include/mach/iommu2.h
+@@ -0,0 +1,94 @@
++/*
++ * omap iommu: omap2 architecture specific definitions
++ *
++ * Copyright (C) 2008-2009 Nokia Corporation
++ *
++ * Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.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.
++ */
++
++#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
++
++#define MMU_REG_SIZE 256
++
++/*
++ * 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 */
+--
+1.5.6.5
+
generated by cgit 1.2.3-korg (git 2.39.0) at 2024-04-28 06:40:25 +0000