2 * QEMU sun4u IOMMU emulation
4 * Copyright (c) 2006 Fabrice Bellard
5 * Copyright (c) 2012,2013 Artyom Tarasenko
6 * Copyright (c) 2017 Mark Cave-Ayland
8 * Permission is hereby granted, free of charge, to any person obtaining a copy
9 * of this software and associated documentation files (the "Software"), to deal
10 * in the Software without restriction, including without limitation the rights
11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
12 * copies of the Software, and to permit persons to whom the Software is
13 * furnished to do so, subject to the following conditions:
15 * The above copyright notice and this permission notice shall be included in
16 * all copies or substantial portions of the Software.
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
27 #include "qemu/osdep.h"
28 #include "hw/sysbus.h"
29 #include "hw/sparc/sun4u_iommu.h"
30 #include "exec/address-spaces.h"
32 #include "qemu/module.h"
36 #define IOMMU_PAGE_SIZE_8K (1ULL << 13)
37 #define IOMMU_PAGE_MASK_8K (~(IOMMU_PAGE_SIZE_8K - 1))
38 #define IOMMU_PAGE_SIZE_64K (1ULL << 16)
39 #define IOMMU_PAGE_MASK_64K (~(IOMMU_PAGE_SIZE_64K - 1))
41 #define IOMMU_CTRL 0x0
42 #define IOMMU_CTRL_TBW_SIZE (1ULL << 2)
43 #define IOMMU_CTRL_MMU_EN (1ULL)
45 #define IOMMU_CTRL_TSB_SHIFT 16
47 #define IOMMU_BASE 0x8
48 #define IOMMU_FLUSH 0x10
50 #define IOMMU_TTE_DATA_V (1ULL << 63)
51 #define IOMMU_TTE_DATA_SIZE (1ULL << 61)
52 #define IOMMU_TTE_DATA_W (1ULL << 1)
54 #define IOMMU_TTE_PHYS_MASK_8K 0x1ffffffe000ULL
55 #define IOMMU_TTE_PHYS_MASK_64K 0x1ffffff8000ULL
57 #define IOMMU_TSB_8K_OFFSET_MASK_8M 0x00000000007fe000ULL
58 #define IOMMU_TSB_8K_OFFSET_MASK_16M 0x0000000000ffe000ULL
59 #define IOMMU_TSB_8K_OFFSET_MASK_32M 0x0000000001ffe000ULL
60 #define IOMMU_TSB_8K_OFFSET_MASK_64M 0x0000000003ffe000ULL
61 #define IOMMU_TSB_8K_OFFSET_MASK_128M 0x0000000007ffe000ULL
62 #define IOMMU_TSB_8K_OFFSET_MASK_256M 0x000000000fffe000ULL
63 #define IOMMU_TSB_8K_OFFSET_MASK_512M 0x000000001fffe000ULL
64 #define IOMMU_TSB_8K_OFFSET_MASK_1G 0x000000003fffe000ULL
66 #define IOMMU_TSB_64K_OFFSET_MASK_64M 0x0000000003ff0000ULL
67 #define IOMMU_TSB_64K_OFFSET_MASK_128M 0x0000000007ff0000ULL
68 #define IOMMU_TSB_64K_OFFSET_MASK_256M 0x000000000fff0000ULL
69 #define IOMMU_TSB_64K_OFFSET_MASK_512M 0x000000001fff0000ULL
70 #define IOMMU_TSB_64K_OFFSET_MASK_1G 0x000000003fff0000ULL
71 #define IOMMU_TSB_64K_OFFSET_MASK_2G 0x000000007fff0000ULL
74 /* Called from RCU critical section */
75 static IOMMUTLBEntry sun4u_translate_iommu(IOMMUMemoryRegion *iommu,
77 IOMMUAccessFlags flag, int iommu_idx)
79 IOMMUState *is = container_of(iommu, IOMMUState, iommu);
80 hwaddr baseaddr, offset;
84 .target_as = &address_space_memory,
87 .addr_mask = ~(hwaddr)0,
91 if (!(is->regs[IOMMU_CTRL >> 3] & IOMMU_CTRL_MMU_EN)) {
92 /* IOMMU disabled, passthrough using standard 8K page */
93 ret.iova = addr & IOMMU_PAGE_MASK_8K;
94 ret.translated_addr = addr;
95 ret.addr_mask = IOMMU_PAGE_MASK_8K;
101 baseaddr = is->regs[IOMMU_BASE >> 3];
102 tsbsize = (is->regs[IOMMU_CTRL >> 3] >> IOMMU_CTRL_TSB_SHIFT) & 0x7;
104 if (is->regs[IOMMU_CTRL >> 3] & IOMMU_CTRL_TBW_SIZE) {
108 offset = (addr & IOMMU_TSB_64K_OFFSET_MASK_64M) >> 13;
111 offset = (addr & IOMMU_TSB_64K_OFFSET_MASK_128M) >> 13;
114 offset = (addr & IOMMU_TSB_64K_OFFSET_MASK_256M) >> 13;
117 offset = (addr & IOMMU_TSB_64K_OFFSET_MASK_512M) >> 13;
120 offset = (addr & IOMMU_TSB_64K_OFFSET_MASK_1G) >> 13;
123 offset = (addr & IOMMU_TSB_64K_OFFSET_MASK_2G) >> 13;
126 /* Not implemented, error */
133 offset = (addr & IOMMU_TSB_8K_OFFSET_MASK_8M) >> 10;
136 offset = (addr & IOMMU_TSB_8K_OFFSET_MASK_16M) >> 10;
139 offset = (addr & IOMMU_TSB_8K_OFFSET_MASK_32M) >> 10;
142 offset = (addr & IOMMU_TSB_8K_OFFSET_MASK_64M) >> 10;
145 offset = (addr & IOMMU_TSB_8K_OFFSET_MASK_128M) >> 10;
148 offset = (addr & IOMMU_TSB_8K_OFFSET_MASK_256M) >> 10;
151 offset = (addr & IOMMU_TSB_8K_OFFSET_MASK_512M) >> 10;
154 offset = (addr & IOMMU_TSB_8K_OFFSET_MASK_1G) >> 10;
159 tte = address_space_ldq_be(&address_space_memory, baseaddr + offset,
160 MEMTXATTRS_UNSPECIFIED, NULL);
162 if (!(tte & IOMMU_TTE_DATA_V)) {
163 /* Invalid mapping */
167 if (tte & IOMMU_TTE_DATA_W) {
175 if (tte & IOMMU_TTE_DATA_SIZE) {
177 ret.iova = addr & IOMMU_PAGE_MASK_64K;
178 ret.translated_addr = tte & IOMMU_TTE_PHYS_MASK_64K;
179 ret.addr_mask = (IOMMU_PAGE_SIZE_64K - 1);
182 ret.iova = addr & IOMMU_PAGE_MASK_8K;
183 ret.translated_addr = tte & IOMMU_TTE_PHYS_MASK_8K;
184 ret.addr_mask = (IOMMU_PAGE_SIZE_8K - 1);
187 trace_sun4u_iommu_translate(ret.iova, ret.translated_addr, tte);
192 static void iommu_mem_write(void *opaque, hwaddr addr,
193 uint64_t val, unsigned size)
195 IOMMUState *is = opaque;
197 trace_sun4u_iommu_mem_write(addr, val, size);
202 is->regs[IOMMU_CTRL >> 3] &= 0xffffffffULL;
203 is->regs[IOMMU_CTRL >> 3] |= val << 32;
205 is->regs[IOMMU_CTRL >> 3] = val;
208 case IOMMU_CTRL + 0x4:
209 is->regs[IOMMU_CTRL >> 3] &= 0xffffffff00000000ULL;
210 is->regs[IOMMU_CTRL >> 3] |= val & 0xffffffffULL;
214 is->regs[IOMMU_BASE >> 3] &= 0xffffffffULL;
215 is->regs[IOMMU_BASE >> 3] |= val << 32;
217 is->regs[IOMMU_BASE >> 3] = val;
220 case IOMMU_BASE + 0x4:
221 is->regs[IOMMU_BASE >> 3] &= 0xffffffff00000000ULL;
222 is->regs[IOMMU_BASE >> 3] |= val & 0xffffffffULL;
225 case IOMMU_FLUSH + 0x4:
228 qemu_log_mask(LOG_UNIMP,
229 "sun4u-iommu: Unimplemented register write "
230 "reg 0x%" HWADDR_PRIx " size 0x%x value 0x%" PRIx64 "\n",
236 static uint64_t iommu_mem_read(void *opaque, hwaddr addr, unsigned size)
238 IOMMUState *is = opaque;
244 val = is->regs[IOMMU_CTRL >> 3] >> 32;
246 val = is->regs[IOMMU_CTRL >> 3];
249 case IOMMU_CTRL + 0x4:
250 val = is->regs[IOMMU_CTRL >> 3] & 0xffffffffULL;
254 val = is->regs[IOMMU_BASE >> 3] >> 32;
256 val = is->regs[IOMMU_BASE >> 3];
259 case IOMMU_BASE + 0x4:
260 val = is->regs[IOMMU_BASE >> 3] & 0xffffffffULL;
263 case IOMMU_FLUSH + 0x4:
267 qemu_log_mask(LOG_UNIMP,
268 "sun4u-iommu: Unimplemented register read "
269 "reg 0x%" HWADDR_PRIx " size 0x%x\n",
275 trace_sun4u_iommu_mem_read(addr, val, size);
280 static const MemoryRegionOps iommu_mem_ops = {
281 .read = iommu_mem_read,
282 .write = iommu_mem_write,
283 .endianness = DEVICE_BIG_ENDIAN,
286 static void iommu_reset(DeviceState *d)
288 IOMMUState *s = SUN4U_IOMMU(d);
290 memset(s->regs, 0, IOMMU_NREGS * sizeof(uint64_t));
293 static void iommu_init(Object *obj)
295 IOMMUState *s = SUN4U_IOMMU(obj);
296 SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
298 memory_region_init_iommu(&s->iommu, sizeof(s->iommu),
299 TYPE_SUN4U_IOMMU_MEMORY_REGION, OBJECT(s),
300 "iommu-sun4u", UINT64_MAX);
301 address_space_init(&s->iommu_as, MEMORY_REGION(&s->iommu), "iommu-as");
303 memory_region_init_io(&s->iomem, obj, &iommu_mem_ops, s, "iommu",
304 IOMMU_NREGS * sizeof(uint64_t));
305 sysbus_init_mmio(sbd, &s->iomem);
308 static void iommu_class_init(ObjectClass *klass, void *data)
310 DeviceClass *dc = DEVICE_CLASS(klass);
312 dc->reset = iommu_reset;
315 static const TypeInfo iommu_info = {
316 .name = TYPE_SUN4U_IOMMU,
317 .parent = TYPE_SYS_BUS_DEVICE,
318 .instance_size = sizeof(IOMMUState),
319 .instance_init = iommu_init,
320 .class_init = iommu_class_init,
323 static void sun4u_iommu_memory_region_class_init(ObjectClass *klass, void *data)
325 IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_CLASS(klass);
327 imrc->translate = sun4u_translate_iommu;
330 static const TypeInfo sun4u_iommu_memory_region_info = {
331 .parent = TYPE_IOMMU_MEMORY_REGION,
332 .name = TYPE_SUN4U_IOMMU_MEMORY_REGION,
333 .class_init = sun4u_iommu_memory_region_class_init,
336 static void iommu_register_types(void)
338 type_register_static(&iommu_info);
339 type_register_static(&sun4u_iommu_memory_region_info);
342 type_init(iommu_register_types)