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Commit | Line | Data |
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420557e8 | 1 | /* |
93c5a32f | 2 | * QEMU Sun4m iommu emulation |
420557e8 | 3 | * |
66321a11 | 4 | * Copyright (c) 2003-2005 Fabrice Bellard |
5fafdf24 | 5 | * |
420557e8 FB |
6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
7 | * of this software and associated documentation files (the "Software"), to deal | |
8 | * in the Software without restriction, including without limitation the rights | |
9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
10 | * copies of the Software, and to permit persons to whom the Software is | |
11 | * furnished to do so, subject to the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice shall be included in | |
14 | * all copies or substantial portions of the Software. | |
15 | * | |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
22 | * THE SOFTWARE. | |
23 | */ | |
5f750b2e | 24 | |
0d09e41a | 25 | #include "hw/sparc/sun4m.h" |
83c9f4ca | 26 | #include "hw/sysbus.h" |
97bf4851 | 27 | #include "trace.h" |
420557e8 | 28 | |
93c5a32f BS |
29 | /* |
30 | * I/O MMU used by Sun4m systems | |
31 | * | |
32 | * Chipset docs: | |
33 | * "Sun-4M System Architecture (revision 2.0) by Chuck Narad", 950-1373-01, | |
34 | * http://mediacast.sun.com/users/Barton808/media/Sun4M_SystemArchitecture_edited2.pdf | |
35 | */ | |
36 | ||
e5e38121 | 37 | #define IOMMU_NREGS (4*4096/4) |
4e3b1ea1 | 38 | #define IOMMU_CTRL (0x0000 >> 2) |
420557e8 FB |
39 | #define IOMMU_CTRL_IMPL 0xf0000000 /* Implementation */ |
40 | #define IOMMU_CTRL_VERS 0x0f000000 /* Version */ | |
41 | #define IOMMU_CTRL_RNGE 0x0000001c /* Mapping RANGE */ | |
42 | #define IOMMU_RNGE_16MB 0x00000000 /* 0xff000000 -> 0xffffffff */ | |
43 | #define IOMMU_RNGE_32MB 0x00000004 /* 0xfe000000 -> 0xffffffff */ | |
44 | #define IOMMU_RNGE_64MB 0x00000008 /* 0xfc000000 -> 0xffffffff */ | |
45 | #define IOMMU_RNGE_128MB 0x0000000c /* 0xf8000000 -> 0xffffffff */ | |
46 | #define IOMMU_RNGE_256MB 0x00000010 /* 0xf0000000 -> 0xffffffff */ | |
47 | #define IOMMU_RNGE_512MB 0x00000014 /* 0xe0000000 -> 0xffffffff */ | |
48 | #define IOMMU_RNGE_1GB 0x00000018 /* 0xc0000000 -> 0xffffffff */ | |
49 | #define IOMMU_RNGE_2GB 0x0000001c /* 0x80000000 -> 0xffffffff */ | |
50 | #define IOMMU_CTRL_ENAB 0x00000001 /* IOMMU Enable */ | |
4e3b1ea1 FB |
51 | #define IOMMU_CTRL_MASK 0x0000001d |
52 | ||
53 | #define IOMMU_BASE (0x0004 >> 2) | |
54 | #define IOMMU_BASE_MASK 0x07fffc00 | |
55 | ||
56 | #define IOMMU_TLBFLUSH (0x0014 >> 2) | |
57 | #define IOMMU_TLBFLUSH_MASK 0xffffffff | |
58 | ||
59 | #define IOMMU_PGFLUSH (0x0018 >> 2) | |
60 | #define IOMMU_PGFLUSH_MASK 0xffffffff | |
61 | ||
225d4be7 BS |
62 | #define IOMMU_AFSR (0x1000 >> 2) |
63 | #define IOMMU_AFSR_ERR 0x80000000 /* LE, TO, or BE asserted */ | |
5ad6bb97 BS |
64 | #define IOMMU_AFSR_LE 0x40000000 /* SBUS reports error after |
65 | transaction */ | |
66 | #define IOMMU_AFSR_TO 0x20000000 /* Write access took more than | |
67 | 12.8 us. */ | |
68 | #define IOMMU_AFSR_BE 0x10000000 /* Write access received error | |
69 | acknowledge */ | |
225d4be7 BS |
70 | #define IOMMU_AFSR_SIZE 0x0e000000 /* Size of transaction causing error */ |
71 | #define IOMMU_AFSR_S 0x01000000 /* Sparc was in supervisor mode */ | |
5ad6bb97 BS |
72 | #define IOMMU_AFSR_RESV 0x00800000 /* Reserved, forced to 0x8 by |
73 | hardware */ | |
225d4be7 BS |
74 | #define IOMMU_AFSR_ME 0x00080000 /* Multiple errors occurred */ |
75 | #define IOMMU_AFSR_RD 0x00040000 /* A read operation was in progress */ | |
76 | #define IOMMU_AFSR_FAV 0x00020000 /* IOMMU afar has valid contents */ | |
c52428fc | 77 | #define IOMMU_AFSR_MASK 0xff0fffff |
225d4be7 BS |
78 | |
79 | #define IOMMU_AFAR (0x1004 >> 2) | |
80 | ||
7b169687 BS |
81 | #define IOMMU_AER (0x1008 >> 2) /* Arbiter Enable Register */ |
82 | #define IOMMU_AER_EN_P0_ARB 0x00000001 /* MBus master 0x8 (Always 1) */ | |
83 | #define IOMMU_AER_EN_P1_ARB 0x00000002 /* MBus master 0x9 */ | |
84 | #define IOMMU_AER_EN_P2_ARB 0x00000004 /* MBus master 0xa */ | |
85 | #define IOMMU_AER_EN_P3_ARB 0x00000008 /* MBus master 0xb */ | |
86 | #define IOMMU_AER_EN_0 0x00010000 /* SBus slot 0 */ | |
87 | #define IOMMU_AER_EN_1 0x00020000 /* SBus slot 1 */ | |
88 | #define IOMMU_AER_EN_2 0x00040000 /* SBus slot 2 */ | |
89 | #define IOMMU_AER_EN_3 0x00080000 /* SBus slot 3 */ | |
90 | #define IOMMU_AER_EN_F 0x00100000 /* SBus on-board */ | |
91 | #define IOMMU_AER_SBW 0x80000000 /* S-to-M asynchronous writes */ | |
92 | #define IOMMU_AER_MASK 0x801f000f | |
93 | ||
4e3b1ea1 FB |
94 | #define IOMMU_SBCFG0 (0x1010 >> 2) /* SBUS configration per-slot */ |
95 | #define IOMMU_SBCFG1 (0x1014 >> 2) /* SBUS configration per-slot */ | |
96 | #define IOMMU_SBCFG2 (0x1018 >> 2) /* SBUS configration per-slot */ | |
97 | #define IOMMU_SBCFG3 (0x101c >> 2) /* SBUS configration per-slot */ | |
5ad6bb97 BS |
98 | #define IOMMU_SBCFG_SAB30 0x00010000 /* Phys-address bit 30 when |
99 | bypass enabled */ | |
4e3b1ea1 FB |
100 | #define IOMMU_SBCFG_BA16 0x00000004 /* Slave supports 16 byte bursts */ |
101 | #define IOMMU_SBCFG_BA8 0x00000002 /* Slave supports 8 byte bursts */ | |
102 | #define IOMMU_SBCFG_BYPASS 0x00000001 /* Bypass IOMMU, treat all addresses | |
f930d07e | 103 | produced by this device as pure |
4e3b1ea1 FB |
104 | physical. */ |
105 | #define IOMMU_SBCFG_MASK 0x00010003 | |
106 | ||
107 | #define IOMMU_ARBEN (0x2000 >> 2) /* SBUS arbitration enable */ | |
108 | #define IOMMU_ARBEN_MASK 0x001f0000 | |
109 | #define IOMMU_MID 0x00000008 | |
420557e8 | 110 | |
e5e38121 BS |
111 | #define IOMMU_MASK_ID (0x3018 >> 2) /* Mask ID */ |
112 | #define IOMMU_MASK_ID_MASK 0x00ffffff | |
113 | ||
114 | #define IOMMU_MSII_MASK 0x26000000 /* microSPARC II mask number */ | |
115 | #define IOMMU_TS_MASK 0x23000000 /* turboSPARC mask number */ | |
116 | ||
420557e8 | 117 | /* The format of an iopte in the page tables */ |
498fbd8a | 118 | #define IOPTE_PAGE 0xffffff00 /* Physical page number (PA[35:12]) */ |
5ad6bb97 BS |
119 | #define IOPTE_CACHE 0x00000080 /* Cached (in vme IOCACHE or |
120 | Viking/MXCC) */ | |
ebabb67a | 121 | #define IOPTE_WRITE 0x00000004 /* Writable */ |
420557e8 FB |
122 | #define IOPTE_VALID 0x00000002 /* IOPTE is valid */ |
123 | #define IOPTE_WAZ 0x00000001 /* Write as zeros */ | |
124 | ||
8b0de438 BS |
125 | #define IOMMU_PAGE_SHIFT 12 |
126 | #define IOMMU_PAGE_SIZE (1 << IOMMU_PAGE_SHIFT) | |
127 | #define IOMMU_PAGE_MASK ~(IOMMU_PAGE_SIZE - 1) | |
420557e8 | 128 | |
049e7d22 AF |
129 | #define TYPE_SUN4M_IOMMU "iommu" |
130 | #define SUN4M_IOMMU(obj) OBJECT_CHECK(IOMMUState, (obj), TYPE_SUN4M_IOMMU) | |
131 | ||
420557e8 | 132 | typedef struct IOMMUState { |
049e7d22 AF |
133 | SysBusDevice parent_obj; |
134 | ||
d224136c | 135 | MemoryRegion iomem; |
66321a11 | 136 | uint32_t regs[IOMMU_NREGS]; |
a8170e5e | 137 | hwaddr iostart; |
ff403da6 | 138 | qemu_irq irq; |
149e1ea1 | 139 | uint32_t version; |
420557e8 FB |
140 | } IOMMUState; |
141 | ||
a8170e5e | 142 | static uint64_t iommu_mem_read(void *opaque, hwaddr addr, |
d224136c | 143 | unsigned size) |
420557e8 FB |
144 | { |
145 | IOMMUState *s = opaque; | |
a8170e5e | 146 | hwaddr saddr; |
ff403da6 | 147 | uint32_t ret; |
420557e8 | 148 | |
8da3ff18 | 149 | saddr = addr >> 2; |
420557e8 FB |
150 | switch (saddr) { |
151 | default: | |
ff403da6 BS |
152 | ret = s->regs[saddr]; |
153 | break; | |
154 | case IOMMU_AFAR: | |
155 | case IOMMU_AFSR: | |
156 | ret = s->regs[saddr]; | |
157 | qemu_irq_lower(s->irq); | |
f930d07e | 158 | break; |
420557e8 | 159 | } |
97bf4851 | 160 | trace_sun4m_iommu_mem_readl(saddr, ret); |
ff403da6 | 161 | return ret; |
420557e8 FB |
162 | } |
163 | ||
a8170e5e | 164 | static void iommu_mem_write(void *opaque, hwaddr addr, |
d224136c | 165 | uint64_t val, unsigned size) |
420557e8 FB |
166 | { |
167 | IOMMUState *s = opaque; | |
a8170e5e | 168 | hwaddr saddr; |
420557e8 | 169 | |
8da3ff18 | 170 | saddr = addr >> 2; |
97bf4851 | 171 | trace_sun4m_iommu_mem_writel(saddr, val); |
420557e8 | 172 | switch (saddr) { |
4e3b1ea1 | 173 | case IOMMU_CTRL: |
f930d07e BS |
174 | switch (val & IOMMU_CTRL_RNGE) { |
175 | case IOMMU_RNGE_16MB: | |
176 | s->iostart = 0xffffffffff000000ULL; | |
177 | break; | |
178 | case IOMMU_RNGE_32MB: | |
179 | s->iostart = 0xfffffffffe000000ULL; | |
180 | break; | |
181 | case IOMMU_RNGE_64MB: | |
182 | s->iostart = 0xfffffffffc000000ULL; | |
183 | break; | |
184 | case IOMMU_RNGE_128MB: | |
185 | s->iostart = 0xfffffffff8000000ULL; | |
186 | break; | |
187 | case IOMMU_RNGE_256MB: | |
188 | s->iostart = 0xfffffffff0000000ULL; | |
189 | break; | |
190 | case IOMMU_RNGE_512MB: | |
191 | s->iostart = 0xffffffffe0000000ULL; | |
192 | break; | |
193 | case IOMMU_RNGE_1GB: | |
194 | s->iostart = 0xffffffffc0000000ULL; | |
195 | break; | |
196 | default: | |
197 | case IOMMU_RNGE_2GB: | |
198 | s->iostart = 0xffffffff80000000ULL; | |
199 | break; | |
200 | } | |
97bf4851 | 201 | trace_sun4m_iommu_mem_writel_ctrl(s->iostart); |
7fbfb139 | 202 | s->regs[saddr] = ((val & IOMMU_CTRL_MASK) | s->version); |
f930d07e | 203 | break; |
4e3b1ea1 | 204 | case IOMMU_BASE: |
f930d07e BS |
205 | s->regs[saddr] = val & IOMMU_BASE_MASK; |
206 | break; | |
4e3b1ea1 | 207 | case IOMMU_TLBFLUSH: |
97bf4851 | 208 | trace_sun4m_iommu_mem_writel_tlbflush(val); |
f930d07e BS |
209 | s->regs[saddr] = val & IOMMU_TLBFLUSH_MASK; |
210 | break; | |
4e3b1ea1 | 211 | case IOMMU_PGFLUSH: |
97bf4851 | 212 | trace_sun4m_iommu_mem_writel_pgflush(val); |
f930d07e BS |
213 | s->regs[saddr] = val & IOMMU_PGFLUSH_MASK; |
214 | break; | |
ff403da6 BS |
215 | case IOMMU_AFAR: |
216 | s->regs[saddr] = val; | |
217 | qemu_irq_lower(s->irq); | |
218 | break; | |
7b169687 BS |
219 | case IOMMU_AER: |
220 | s->regs[saddr] = (val & IOMMU_AER_MASK) | IOMMU_AER_EN_P0_ARB; | |
221 | break; | |
c52428fc BS |
222 | case IOMMU_AFSR: |
223 | s->regs[saddr] = (val & IOMMU_AFSR_MASK) | IOMMU_AFSR_RESV; | |
ff403da6 | 224 | qemu_irq_lower(s->irq); |
c52428fc | 225 | break; |
4e3b1ea1 FB |
226 | case IOMMU_SBCFG0: |
227 | case IOMMU_SBCFG1: | |
228 | case IOMMU_SBCFG2: | |
229 | case IOMMU_SBCFG3: | |
f930d07e BS |
230 | s->regs[saddr] = val & IOMMU_SBCFG_MASK; |
231 | break; | |
4e3b1ea1 FB |
232 | case IOMMU_ARBEN: |
233 | // XXX implement SBus probing: fault when reading unmapped | |
234 | // addresses, fault cause and address stored to MMU/IOMMU | |
f930d07e BS |
235 | s->regs[saddr] = (val & IOMMU_ARBEN_MASK) | IOMMU_MID; |
236 | break; | |
e5e38121 BS |
237 | case IOMMU_MASK_ID: |
238 | s->regs[saddr] |= val & IOMMU_MASK_ID_MASK; | |
239 | break; | |
420557e8 | 240 | default: |
f930d07e BS |
241 | s->regs[saddr] = val; |
242 | break; | |
420557e8 FB |
243 | } |
244 | } | |
245 | ||
d224136c AK |
246 | static const MemoryRegionOps iommu_mem_ops = { |
247 | .read = iommu_mem_read, | |
248 | .write = iommu_mem_write, | |
249 | .endianness = DEVICE_NATIVE_ENDIAN, | |
250 | .valid = { | |
251 | .min_access_size = 4, | |
252 | .max_access_size = 4, | |
253 | }, | |
420557e8 FB |
254 | }; |
255 | ||
a8170e5e | 256 | static uint32_t iommu_page_get_flags(IOMMUState *s, hwaddr addr) |
420557e8 | 257 | { |
5e3b100b | 258 | uint32_t ret; |
a8170e5e AK |
259 | hwaddr iopte; |
260 | hwaddr pa = addr; | |
420557e8 | 261 | |
981a2e99 | 262 | iopte = s->regs[IOMMU_BASE] << 4; |
66321a11 | 263 | addr &= ~s->iostart; |
8b0de438 | 264 | iopte += (addr >> (IOMMU_PAGE_SHIFT - 2)) & ~3; |
d2c0bd84 | 265 | ret = ldl_be_phys(iopte); |
97bf4851 | 266 | trace_sun4m_iommu_page_get_flags(pa, iopte, ret); |
981a2e99 | 267 | return ret; |
a917d384 PB |
268 | } |
269 | ||
a8170e5e | 270 | static hwaddr iommu_translate_pa(hwaddr addr, |
5dcb6b91 | 271 | uint32_t pte) |
a917d384 | 272 | { |
a8170e5e | 273 | hwaddr pa; |
5dcb6b91 | 274 | |
8b0de438 | 275 | pa = ((pte & IOPTE_PAGE) << 4) + (addr & ~IOMMU_PAGE_MASK); |
97bf4851 | 276 | trace_sun4m_iommu_translate_pa(addr, pa, pte); |
66321a11 | 277 | return pa; |
420557e8 FB |
278 | } |
279 | ||
a8170e5e | 280 | static void iommu_bad_addr(IOMMUState *s, hwaddr addr, |
5ad6bb97 | 281 | int is_write) |
225d4be7 | 282 | { |
97bf4851 | 283 | trace_sun4m_iommu_bad_addr(addr); |
5ad6bb97 | 284 | s->regs[IOMMU_AFSR] = IOMMU_AFSR_ERR | IOMMU_AFSR_LE | IOMMU_AFSR_RESV | |
225d4be7 BS |
285 | IOMMU_AFSR_FAV; |
286 | if (!is_write) | |
287 | s->regs[IOMMU_AFSR] |= IOMMU_AFSR_RD; | |
288 | s->regs[IOMMU_AFAR] = addr; | |
ff403da6 | 289 | qemu_irq_raise(s->irq); |
225d4be7 BS |
290 | } |
291 | ||
a8170e5e | 292 | void sparc_iommu_memory_rw(void *opaque, hwaddr addr, |
67e999be | 293 | uint8_t *buf, int len, int is_write) |
a917d384 | 294 | { |
5dcb6b91 BS |
295 | int l; |
296 | uint32_t flags; | |
a8170e5e | 297 | hwaddr page, phys_addr; |
a917d384 PB |
298 | |
299 | while (len > 0) { | |
8b0de438 BS |
300 | page = addr & IOMMU_PAGE_MASK; |
301 | l = (page + IOMMU_PAGE_SIZE) - addr; | |
a917d384 PB |
302 | if (l > len) |
303 | l = len; | |
304 | flags = iommu_page_get_flags(opaque, page); | |
225d4be7 BS |
305 | if (!(flags & IOPTE_VALID)) { |
306 | iommu_bad_addr(opaque, page, is_write); | |
a917d384 | 307 | return; |
225d4be7 | 308 | } |
22548760 | 309 | phys_addr = iommu_translate_pa(addr, flags); |
a917d384 | 310 | if (is_write) { |
225d4be7 BS |
311 | if (!(flags & IOPTE_WRITE)) { |
312 | iommu_bad_addr(opaque, page, is_write); | |
a917d384 | 313 | return; |
225d4be7 | 314 | } |
a5cdf952 | 315 | cpu_physical_memory_write(phys_addr, buf, l); |
a917d384 | 316 | } else { |
a5cdf952 | 317 | cpu_physical_memory_read(phys_addr, buf, l); |
a917d384 PB |
318 | } |
319 | len -= l; | |
320 | buf += l; | |
321 | addr += l; | |
322 | } | |
323 | } | |
324 | ||
db3c9e08 BS |
325 | static const VMStateDescription vmstate_iommu = { |
326 | .name ="iommu", | |
327 | .version_id = 2, | |
328 | .minimum_version_id = 2, | |
329 | .minimum_version_id_old = 2, | |
330 | .fields = (VMStateField []) { | |
331 | VMSTATE_UINT32_ARRAY(regs, IOMMUState, IOMMU_NREGS), | |
332 | VMSTATE_UINT64(iostart, IOMMUState), | |
333 | VMSTATE_END_OF_LIST() | |
334 | } | |
335 | }; | |
e80cfcfc | 336 | |
1a522e8a | 337 | static void iommu_reset(DeviceState *d) |
e80cfcfc | 338 | { |
049e7d22 | 339 | IOMMUState *s = SUN4M_IOMMU(d); |
e80cfcfc | 340 | |
66321a11 | 341 | memset(s->regs, 0, IOMMU_NREGS * 4); |
e80cfcfc | 342 | s->iostart = 0; |
7fbfb139 BS |
343 | s->regs[IOMMU_CTRL] = s->version; |
344 | s->regs[IOMMU_ARBEN] = IOMMU_MID; | |
5ad6bb97 | 345 | s->regs[IOMMU_AFSR] = IOMMU_AFSR_RESV; |
7b169687 | 346 | s->regs[IOMMU_AER] = IOMMU_AER_EN_P0_ARB | IOMMU_AER_EN_P1_ARB; |
e5e38121 | 347 | s->regs[IOMMU_MASK_ID] = IOMMU_TS_MASK; |
e80cfcfc FB |
348 | } |
349 | ||
81a322d4 | 350 | static int iommu_init1(SysBusDevice *dev) |
5f750b2e | 351 | { |
049e7d22 | 352 | IOMMUState *s = SUN4M_IOMMU(dev); |
420557e8 | 353 | |
5f750b2e | 354 | sysbus_init_irq(dev, &s->irq); |
420557e8 | 355 | |
3eadad55 | 356 | memory_region_init_io(&s->iomem, OBJECT(s), &iommu_mem_ops, s, "iommu", |
d224136c | 357 | IOMMU_NREGS * sizeof(uint32_t)); |
750ecd44 | 358 | sysbus_init_mmio(dev, &s->iomem); |
3b46e624 | 359 | |
81a322d4 | 360 | return 0; |
420557e8 | 361 | } |
5f750b2e | 362 | |
999e12bb AL |
363 | static Property iommu_properties[] = { |
364 | DEFINE_PROP_HEX32("version", IOMMUState, version, 0), | |
365 | DEFINE_PROP_END_OF_LIST(), | |
366 | }; | |
367 | ||
368 | static void iommu_class_init(ObjectClass *klass, void *data) | |
369 | { | |
39bffca2 | 370 | DeviceClass *dc = DEVICE_CLASS(klass); |
999e12bb AL |
371 | SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); |
372 | ||
373 | k->init = iommu_init1; | |
39bffca2 AL |
374 | dc->reset = iommu_reset; |
375 | dc->vmsd = &vmstate_iommu; | |
376 | dc->props = iommu_properties; | |
999e12bb AL |
377 | } |
378 | ||
8c43a6f0 | 379 | static const TypeInfo iommu_info = { |
049e7d22 | 380 | .name = TYPE_SUN4M_IOMMU, |
39bffca2 AL |
381 | .parent = TYPE_SYS_BUS_DEVICE, |
382 | .instance_size = sizeof(IOMMUState), | |
383 | .class_init = iommu_class_init, | |
5f750b2e BS |
384 | }; |
385 | ||
83f7d43a | 386 | static void iommu_register_types(void) |
5f750b2e | 387 | { |
39bffca2 | 388 | type_register_static(&iommu_info); |
5f750b2e BS |
389 | } |
390 | ||
83f7d43a | 391 | type_init(iommu_register_types) |