From 240566908f55c51f17acc85e6a6b6281a42a1183 Mon Sep 17 00:00:00 2001 From: Blue Swirl Date: Sat, 3 Apr 2010 07:35:50 +0000 Subject: sparc32: rename iommu.c to sun4m_iommu.c to make room for other IOMMUs Signed-off-by: Blue Swirl --- hw/sun4m_iommu.c | 384 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 384 insertions(+) create mode 100644 hw/sun4m_iommu.c (limited to 'hw/sun4m_iommu.c') diff --git a/hw/sun4m_iommu.c b/hw/sun4m_iommu.c new file mode 100644 index 0000000000..0cd2ed00e3 --- /dev/null +++ b/hw/sun4m_iommu.c @@ -0,0 +1,384 @@ +/* + * 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 "sun4m.h" +#include "sysbus.h" + +/* debug iommu */ +//#define DEBUG_IOMMU + +#ifdef DEBUG_IOMMU +#define DPRINTF(fmt, ...) \ + do { printf("IOMMU: " fmt , ## __VA_ARGS__); } while (0) +#else +#define DPRINTF(fmt, ...) +#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 { + SysBusDevice busdev; + 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 * const iommu_mem_read[3] = { + NULL, + NULL, + iommu_mem_readl, +}; + +static CPUWriteMemoryFunc * const 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) +{ + target_phys_addr_t pa; + + pa = ((pte & IOPTE_PAGE) << 4) + (addr & ~IOMMU_PAGE_MASK); + DPRINTF("xlate dva " TARGET_FMT_plx " => pa " TARGET_FMT_plx + " (iopte = %x)\n", addr, pa, pte); + + 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 const VMStateDescription vmstate_iommu = { + .name ="iommu", + .version_id = 2, + .minimum_version_id = 2, + .minimum_version_id_old = 2, + .fields = (VMStateField []) { + VMSTATE_UINT32_ARRAY(regs, IOMMUState, IOMMU_NREGS), + VMSTATE_UINT64(iostart, IOMMUState), + VMSTATE_END_OF_LIST() + } +}; + +static void iommu_reset(DeviceState *d) +{ + IOMMUState *s = container_of(d, IOMMUState, busdev.qdev); + + 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; +} + +static int iommu_init1(SysBusDevice *dev) +{ + IOMMUState *s = FROM_SYSBUS(IOMMUState, dev); + int io; + + sysbus_init_irq(dev, &s->irq); + + io = cpu_register_io_memory(iommu_mem_read, iommu_mem_write, s); + sysbus_init_mmio(dev, IOMMU_NREGS * sizeof(uint32_t), io); + + return 0; +} + +static SysBusDeviceInfo iommu_info = { + .init = iommu_init1, + .qdev.name = "iommu", + .qdev.size = sizeof(IOMMUState), + .qdev.vmsd = &vmstate_iommu, + .qdev.reset = iommu_reset, + .qdev.props = (Property[]) { + DEFINE_PROP_HEX32("version", IOMMUState, version, 0), + DEFINE_PROP_END_OF_LIST(), + } +}; + +static void iommu_register_devices(void) +{ + sysbus_register_withprop(&iommu_info); +} + +device_init(iommu_register_devices) -- cgit v1.2.3