--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/symbian-qemu-0.9.1-12/qemu-symbian-svp/hw/iommu.c Fri Jul 31 15:01:17 2009 +0100
@@ -0,0 +1,388 @@
+/*
+ * QEMU SPARC iommu emulation
+ *
+ * Copyright (c) 2003-2005 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include "hw.h"
+#include "sun4m.h"
+
+/* debug iommu */
+//#define DEBUG_IOMMU
+
+#ifdef DEBUG_IOMMU
+#define DPRINTF(fmt, args...) \
+do { printf("IOMMU: " fmt , ##args); } while (0)
+#else
+#define DPRINTF(fmt, args...)
+#endif
+
+#define IOMMU_NREGS (4*4096/4)
+#define IOMMU_CTRL (0x0000 >> 2)
+#define IOMMU_CTRL_IMPL 0xf0000000 /* Implementation */
+#define IOMMU_CTRL_VERS 0x0f000000 /* Version */
+#define IOMMU_CTRL_RNGE 0x0000001c /* Mapping RANGE */
+#define IOMMU_RNGE_16MB 0x00000000 /* 0xff000000 -> 0xffffffff */
+#define IOMMU_RNGE_32MB 0x00000004 /* 0xfe000000 -> 0xffffffff */
+#define IOMMU_RNGE_64MB 0x00000008 /* 0xfc000000 -> 0xffffffff */
+#define IOMMU_RNGE_128MB 0x0000000c /* 0xf8000000 -> 0xffffffff */
+#define IOMMU_RNGE_256MB 0x00000010 /* 0xf0000000 -> 0xffffffff */
+#define IOMMU_RNGE_512MB 0x00000014 /* 0xe0000000 -> 0xffffffff */
+#define IOMMU_RNGE_1GB 0x00000018 /* 0xc0000000 -> 0xffffffff */
+#define IOMMU_RNGE_2GB 0x0000001c /* 0x80000000 -> 0xffffffff */
+#define IOMMU_CTRL_ENAB 0x00000001 /* IOMMU Enable */
+#define IOMMU_CTRL_MASK 0x0000001d
+
+#define IOMMU_BASE (0x0004 >> 2)
+#define IOMMU_BASE_MASK 0x07fffc00
+
+#define IOMMU_TLBFLUSH (0x0014 >> 2)
+#define IOMMU_TLBFLUSH_MASK 0xffffffff
+
+#define IOMMU_PGFLUSH (0x0018 >> 2)
+#define IOMMU_PGFLUSH_MASK 0xffffffff
+
+#define IOMMU_AFSR (0x1000 >> 2)
+#define IOMMU_AFSR_ERR 0x80000000 /* LE, TO, or BE asserted */
+#define IOMMU_AFSR_LE 0x40000000 /* SBUS reports error after
+ transaction */
+#define IOMMU_AFSR_TO 0x20000000 /* Write access took more than
+ 12.8 us. */
+#define IOMMU_AFSR_BE 0x10000000 /* Write access received error
+ acknowledge */
+#define IOMMU_AFSR_SIZE 0x0e000000 /* Size of transaction causing error */
+#define IOMMU_AFSR_S 0x01000000 /* Sparc was in supervisor mode */
+#define IOMMU_AFSR_RESV 0x00800000 /* Reserved, forced to 0x8 by
+ hardware */
+#define IOMMU_AFSR_ME 0x00080000 /* Multiple errors occurred */
+#define IOMMU_AFSR_RD 0x00040000 /* A read operation was in progress */
+#define IOMMU_AFSR_FAV 0x00020000 /* IOMMU afar has valid contents */
+#define IOMMU_AFSR_MASK 0xff0fffff
+
+#define IOMMU_AFAR (0x1004 >> 2)
+
+#define IOMMU_AER (0x1008 >> 2) /* Arbiter Enable Register */
+#define IOMMU_AER_EN_P0_ARB 0x00000001 /* MBus master 0x8 (Always 1) */
+#define IOMMU_AER_EN_P1_ARB 0x00000002 /* MBus master 0x9 */
+#define IOMMU_AER_EN_P2_ARB 0x00000004 /* MBus master 0xa */
+#define IOMMU_AER_EN_P3_ARB 0x00000008 /* MBus master 0xb */
+#define IOMMU_AER_EN_0 0x00010000 /* SBus slot 0 */
+#define IOMMU_AER_EN_1 0x00020000 /* SBus slot 1 */
+#define IOMMU_AER_EN_2 0x00040000 /* SBus slot 2 */
+#define IOMMU_AER_EN_3 0x00080000 /* SBus slot 3 */
+#define IOMMU_AER_EN_F 0x00100000 /* SBus on-board */
+#define IOMMU_AER_SBW 0x80000000 /* S-to-M asynchronous writes */
+#define IOMMU_AER_MASK 0x801f000f
+
+#define IOMMU_SBCFG0 (0x1010 >> 2) /* SBUS configration per-slot */
+#define IOMMU_SBCFG1 (0x1014 >> 2) /* SBUS configration per-slot */
+#define IOMMU_SBCFG2 (0x1018 >> 2) /* SBUS configration per-slot */
+#define IOMMU_SBCFG3 (0x101c >> 2) /* SBUS configration per-slot */
+#define IOMMU_SBCFG_SAB30 0x00010000 /* Phys-address bit 30 when
+ bypass enabled */
+#define IOMMU_SBCFG_BA16 0x00000004 /* Slave supports 16 byte bursts */
+#define IOMMU_SBCFG_BA8 0x00000002 /* Slave supports 8 byte bursts */
+#define IOMMU_SBCFG_BYPASS 0x00000001 /* Bypass IOMMU, treat all addresses
+ produced by this device as pure
+ physical. */
+#define IOMMU_SBCFG_MASK 0x00010003
+
+#define IOMMU_ARBEN (0x2000 >> 2) /* SBUS arbitration enable */
+#define IOMMU_ARBEN_MASK 0x001f0000
+#define IOMMU_MID 0x00000008
+
+#define IOMMU_MASK_ID (0x3018 >> 2) /* Mask ID */
+#define IOMMU_MASK_ID_MASK 0x00ffffff
+
+#define IOMMU_MSII_MASK 0x26000000 /* microSPARC II mask number */
+#define IOMMU_TS_MASK 0x23000000 /* turboSPARC mask number */
+
+/* The format of an iopte in the page tables */
+#define IOPTE_PAGE 0xffffff00 /* Physical page number (PA[35:12]) */
+#define IOPTE_CACHE 0x00000080 /* Cached (in vme IOCACHE or
+ Viking/MXCC) */
+#define IOPTE_WRITE 0x00000004 /* Writeable */
+#define IOPTE_VALID 0x00000002 /* IOPTE is valid */
+#define IOPTE_WAZ 0x00000001 /* Write as zeros */
+
+#define IOMMU_PAGE_SHIFT 12
+#define IOMMU_PAGE_SIZE (1 << IOMMU_PAGE_SHIFT)
+#define IOMMU_PAGE_MASK ~(IOMMU_PAGE_SIZE - 1)
+
+typedef struct IOMMUState {
+ uint32_t regs[IOMMU_NREGS];
+ target_phys_addr_t iostart;
+ uint32_t version;
+ qemu_irq irq;
+} IOMMUState;
+
+static uint32_t iommu_mem_readl(void *opaque, target_phys_addr_t addr)
+{
+ IOMMUState *s = opaque;
+ target_phys_addr_t saddr;
+ uint32_t ret;
+
+ saddr = addr >> 2;
+ switch (saddr) {
+ default:
+ ret = s->regs[saddr];
+ break;
+ case IOMMU_AFAR:
+ case IOMMU_AFSR:
+ ret = s->regs[saddr];
+ qemu_irq_lower(s->irq);
+ break;
+ }
+ DPRINTF("read reg[%d] = %x\n", (int)saddr, ret);
+ return ret;
+}
+
+static void iommu_mem_writel(void *opaque, target_phys_addr_t addr,
+ uint32_t val)
+{
+ IOMMUState *s = opaque;
+ target_phys_addr_t saddr;
+
+ saddr = addr >> 2;
+ DPRINTF("write reg[%d] = %x\n", (int)saddr, val);
+ switch (saddr) {
+ case IOMMU_CTRL:
+ switch (val & IOMMU_CTRL_RNGE) {
+ case IOMMU_RNGE_16MB:
+ s->iostart = 0xffffffffff000000ULL;
+ break;
+ case IOMMU_RNGE_32MB:
+ s->iostart = 0xfffffffffe000000ULL;
+ break;
+ case IOMMU_RNGE_64MB:
+ s->iostart = 0xfffffffffc000000ULL;
+ break;
+ case IOMMU_RNGE_128MB:
+ s->iostart = 0xfffffffff8000000ULL;
+ break;
+ case IOMMU_RNGE_256MB:
+ s->iostart = 0xfffffffff0000000ULL;
+ break;
+ case IOMMU_RNGE_512MB:
+ s->iostart = 0xffffffffe0000000ULL;
+ break;
+ case IOMMU_RNGE_1GB:
+ s->iostart = 0xffffffffc0000000ULL;
+ break;
+ default:
+ case IOMMU_RNGE_2GB:
+ s->iostart = 0xffffffff80000000ULL;
+ break;
+ }
+ DPRINTF("iostart = " TARGET_FMT_plx "\n", s->iostart);
+ s->regs[saddr] = ((val & IOMMU_CTRL_MASK) | s->version);
+ break;
+ case IOMMU_BASE:
+ s->regs[saddr] = val & IOMMU_BASE_MASK;
+ break;
+ case IOMMU_TLBFLUSH:
+ DPRINTF("tlb flush %x\n", val);
+ s->regs[saddr] = val & IOMMU_TLBFLUSH_MASK;
+ break;
+ case IOMMU_PGFLUSH:
+ DPRINTF("page flush %x\n", val);
+ s->regs[saddr] = val & IOMMU_PGFLUSH_MASK;
+ break;
+ case IOMMU_AFAR:
+ s->regs[saddr] = val;
+ qemu_irq_lower(s->irq);
+ break;
+ case IOMMU_AER:
+ s->regs[saddr] = (val & IOMMU_AER_MASK) | IOMMU_AER_EN_P0_ARB;
+ break;
+ case IOMMU_AFSR:
+ s->regs[saddr] = (val & IOMMU_AFSR_MASK) | IOMMU_AFSR_RESV;
+ qemu_irq_lower(s->irq);
+ break;
+ case IOMMU_SBCFG0:
+ case IOMMU_SBCFG1:
+ case IOMMU_SBCFG2:
+ case IOMMU_SBCFG3:
+ s->regs[saddr] = val & IOMMU_SBCFG_MASK;
+ break;
+ case IOMMU_ARBEN:
+ // XXX implement SBus probing: fault when reading unmapped
+ // addresses, fault cause and address stored to MMU/IOMMU
+ s->regs[saddr] = (val & IOMMU_ARBEN_MASK) | IOMMU_MID;
+ break;
+ case IOMMU_MASK_ID:
+ s->regs[saddr] |= val & IOMMU_MASK_ID_MASK;
+ break;
+ default:
+ s->regs[saddr] = val;
+ break;
+ }
+}
+
+static CPUReadMemoryFunc *iommu_mem_read[3] = {
+ NULL,
+ NULL,
+ iommu_mem_readl,
+};
+
+static CPUWriteMemoryFunc *iommu_mem_write[3] = {
+ NULL,
+ NULL,
+ iommu_mem_writel,
+};
+
+static uint32_t iommu_page_get_flags(IOMMUState *s, target_phys_addr_t addr)
+{
+ uint32_t ret;
+ target_phys_addr_t iopte;
+#ifdef DEBUG_IOMMU
+ target_phys_addr_t pa = addr;
+#endif
+
+ iopte = s->regs[IOMMU_BASE] << 4;
+ addr &= ~s->iostart;
+ iopte += (addr >> (IOMMU_PAGE_SHIFT - 2)) & ~3;
+ cpu_physical_memory_read(iopte, (uint8_t *)&ret, 4);
+ tswap32s(&ret);
+ DPRINTF("get flags addr " TARGET_FMT_plx " => pte " TARGET_FMT_plx
+ ", *pte = %x\n", pa, iopte, ret);
+
+ return ret;
+}
+
+static target_phys_addr_t iommu_translate_pa(target_phys_addr_t addr,
+ uint32_t pte)
+{
+ uint32_t tmppte;
+ target_phys_addr_t pa;
+
+ tmppte = pte;
+ pa = ((pte & IOPTE_PAGE) << 4) + (addr & ~IOMMU_PAGE_MASK);
+ DPRINTF("xlate dva " TARGET_FMT_plx " => pa " TARGET_FMT_plx
+ " (iopte = %x)\n", addr, pa, tmppte);
+
+ return pa;
+}
+
+static void iommu_bad_addr(IOMMUState *s, target_phys_addr_t addr,
+ int is_write)
+{
+ DPRINTF("bad addr " TARGET_FMT_plx "\n", addr);
+ s->regs[IOMMU_AFSR] = IOMMU_AFSR_ERR | IOMMU_AFSR_LE | IOMMU_AFSR_RESV |
+ IOMMU_AFSR_FAV;
+ if (!is_write)
+ s->regs[IOMMU_AFSR] |= IOMMU_AFSR_RD;
+ s->regs[IOMMU_AFAR] = addr;
+ qemu_irq_raise(s->irq);
+}
+
+void sparc_iommu_memory_rw(void *opaque, target_phys_addr_t addr,
+ uint8_t *buf, int len, int is_write)
+{
+ int l;
+ uint32_t flags;
+ target_phys_addr_t page, phys_addr;
+
+ while (len > 0) {
+ page = addr & IOMMU_PAGE_MASK;
+ l = (page + IOMMU_PAGE_SIZE) - addr;
+ if (l > len)
+ l = len;
+ flags = iommu_page_get_flags(opaque, page);
+ if (!(flags & IOPTE_VALID)) {
+ iommu_bad_addr(opaque, page, is_write);
+ return;
+ }
+ phys_addr = iommu_translate_pa(addr, flags);
+ if (is_write) {
+ if (!(flags & IOPTE_WRITE)) {
+ iommu_bad_addr(opaque, page, is_write);
+ return;
+ }
+ cpu_physical_memory_write(phys_addr, buf, l);
+ } else {
+ cpu_physical_memory_read(phys_addr, buf, l);
+ }
+ len -= l;
+ buf += l;
+ addr += l;
+ }
+}
+
+static void iommu_save(QEMUFile *f, void *opaque)
+{
+ IOMMUState *s = opaque;
+ int i;
+
+ for (i = 0; i < IOMMU_NREGS; i++)
+ qemu_put_be32s(f, &s->regs[i]);
+ qemu_put_be64s(f, &s->iostart);
+}
+
+static int iommu_load(QEMUFile *f, void *opaque, int version_id)
+{
+ IOMMUState *s = opaque;
+ int i;
+
+ if (version_id != 2)
+ return -EINVAL;
+
+ for (i = 0; i < IOMMU_NREGS; i++)
+ qemu_get_be32s(f, &s->regs[i]);
+ qemu_get_be64s(f, &s->iostart);
+
+ return 0;
+}
+
+static void iommu_reset(void *opaque)
+{
+ IOMMUState *s = opaque;
+
+ memset(s->regs, 0, IOMMU_NREGS * 4);
+ s->iostart = 0;
+ s->regs[IOMMU_CTRL] = s->version;
+ s->regs[IOMMU_ARBEN] = IOMMU_MID;
+ s->regs[IOMMU_AFSR] = IOMMU_AFSR_RESV;
+ s->regs[IOMMU_AER] = IOMMU_AER_EN_P0_ARB | IOMMU_AER_EN_P1_ARB;
+ s->regs[IOMMU_MASK_ID] = IOMMU_TS_MASK;
+ qemu_irq_lower(s->irq);
+}
+
+void *iommu_init(target_phys_addr_t addr, uint32_t version, qemu_irq irq)
+{
+ IOMMUState *s;
+ int iommu_io_memory;
+
+ s = qemu_mallocz(sizeof(IOMMUState));
+ if (!s)
+ return NULL;
+
+ s->version = version;
+ s->irq = irq;
+
+ iommu_io_memory = cpu_register_io_memory(0, iommu_mem_read,
+ iommu_mem_write, s);
+ cpu_register_physical_memory(addr, IOMMU_NREGS * 4, iommu_io_memory);
+
+ register_savevm("iommu", addr, 2, iommu_save, iommu_load, s);
+ qemu_register_reset(iommu_reset, s);
+ iommu_reset(s);
+ return s;
+}