2 * QEMU SPARC iommu emulation
4 * Copyright (c) 2003-2005 Fabrice Bellard
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:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
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
31 #define DPRINTF(fmt, args...) \
32 do { printf("IOMMU: " fmt , ##args); } while (0)
34 #define DPRINTF(fmt, args...)
37 #define IOMMU_NREGS (3*4096/4)
38 #define IOMMU_CTRL (0x0000 >> 2)
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 */
51 #define IOMMU_CTRL_MASK 0x0000001d
53 #define IOMMU_BASE (0x0004 >> 2)
54 #define IOMMU_BASE_MASK 0x07fffc00
56 #define IOMMU_TLBFLUSH (0x0014 >> 2)
57 #define IOMMU_TLBFLUSH_MASK 0xffffffff
59 #define IOMMU_PGFLUSH (0x0018 >> 2)
60 #define IOMMU_PGFLUSH_MASK 0xffffffff
62 #define IOMMU_AFSR (0x1000 >> 2)
63 #define IOMMU_AFSR_ERR 0x80000000 /* LE, TO, or BE asserted */
64 #define IOMMU_AFSR_LE 0x40000000 /* SBUS reports error after
66 #define IOMMU_AFSR_TO 0x20000000 /* Write access took more than
68 #define IOMMU_AFSR_BE 0x10000000 /* Write access received error
70 #define IOMMU_AFSR_SIZE 0x0e000000 /* Size of transaction causing error */
71 #define IOMMU_AFSR_S 0x01000000 /* Sparc was in supervisor mode */
72 #define IOMMU_AFSR_RESV 0x00800000 /* Reserved, forced to 0x8 by
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 */
77 #define IOMMU_AFSR_MASK 0xff0fffff
79 #define IOMMU_AFAR (0x1004 >> 2)
81 #define IOMMU_SBCFG0 (0x1010 >> 2) /* SBUS configration per-slot */
82 #define IOMMU_SBCFG1 (0x1014 >> 2) /* SBUS configration per-slot */
83 #define IOMMU_SBCFG2 (0x1018 >> 2) /* SBUS configration per-slot */
84 #define IOMMU_SBCFG3 (0x101c >> 2) /* SBUS configration per-slot */
85 #define IOMMU_SBCFG_SAB30 0x00010000 /* Phys-address bit 30 when
87 #define IOMMU_SBCFG_BA16 0x00000004 /* Slave supports 16 byte bursts */
88 #define IOMMU_SBCFG_BA8 0x00000002 /* Slave supports 8 byte bursts */
89 #define IOMMU_SBCFG_BYPASS 0x00000001 /* Bypass IOMMU, treat all addresses
90 produced by this device as pure
92 #define IOMMU_SBCFG_MASK 0x00010003
94 #define IOMMU_ARBEN (0x2000 >> 2) /* SBUS arbitration enable */
95 #define IOMMU_ARBEN_MASK 0x001f0000
96 #define IOMMU_MID 0x00000008
98 /* The format of an iopte in the page tables */
99 #define IOPTE_PAGE 0xffffff00 /* Physical page number (PA[35:12]) */
100 #define IOPTE_CACHE 0x00000080 /* Cached (in vme IOCACHE or
102 #define IOPTE_WRITE 0x00000004 /* Writeable */
103 #define IOPTE_VALID 0x00000002 /* IOPTE is valid */
104 #define IOPTE_WAZ 0x00000001 /* Write as zeros */
106 #define PAGE_SHIFT 12
107 #define PAGE_SIZE (1 << PAGE_SHIFT)
108 #define PAGE_MASK (PAGE_SIZE - 1)
110 typedef struct IOMMUState {
111 target_phys_addr_t addr;
112 uint32_t regs[IOMMU_NREGS];
113 target_phys_addr_t iostart;
117 static uint32_t iommu_mem_readw(void *opaque, target_phys_addr_t addr)
119 IOMMUState *s = opaque;
120 target_phys_addr_t saddr;
122 saddr = (addr - s->addr) >> 2;
125 DPRINTF("read reg[%d] = %x\n", (int)saddr, s->regs[saddr]);
126 return s->regs[saddr];
132 static void iommu_mem_writew(void *opaque, target_phys_addr_t addr,
135 IOMMUState *s = opaque;
136 target_phys_addr_t saddr;
138 saddr = (addr - s->addr) >> 2;
139 DPRINTF("write reg[%d] = %x\n", (int)saddr, val);
142 switch (val & IOMMU_CTRL_RNGE) {
143 case IOMMU_RNGE_16MB:
144 s->iostart = 0xffffffffff000000ULL;
146 case IOMMU_RNGE_32MB:
147 s->iostart = 0xfffffffffe000000ULL;
149 case IOMMU_RNGE_64MB:
150 s->iostart = 0xfffffffffc000000ULL;
152 case IOMMU_RNGE_128MB:
153 s->iostart = 0xfffffffff8000000ULL;
155 case IOMMU_RNGE_256MB:
156 s->iostart = 0xfffffffff0000000ULL;
158 case IOMMU_RNGE_512MB:
159 s->iostart = 0xffffffffe0000000ULL;
162 s->iostart = 0xffffffffc0000000ULL;
166 s->iostart = 0xffffffff80000000ULL;
169 DPRINTF("iostart = " TARGET_FMT_plx "\n", s->iostart);
170 s->regs[saddr] = ((val & IOMMU_CTRL_MASK) | s->version);
173 s->regs[saddr] = val & IOMMU_BASE_MASK;
176 DPRINTF("tlb flush %x\n", val);
177 s->regs[saddr] = val & IOMMU_TLBFLUSH_MASK;
180 DPRINTF("page flush %x\n", val);
181 s->regs[saddr] = val & IOMMU_PGFLUSH_MASK;
184 s->regs[saddr] = (val & IOMMU_AFSR_MASK) | IOMMU_AFSR_RESV;
190 s->regs[saddr] = val & IOMMU_SBCFG_MASK;
193 // XXX implement SBus probing: fault when reading unmapped
194 // addresses, fault cause and address stored to MMU/IOMMU
195 s->regs[saddr] = (val & IOMMU_ARBEN_MASK) | IOMMU_MID;
198 s->regs[saddr] = val;
203 static CPUReadMemoryFunc *iommu_mem_read[3] = {
209 static CPUWriteMemoryFunc *iommu_mem_write[3] = {
215 static uint32_t iommu_page_get_flags(IOMMUState *s, target_phys_addr_t addr)
218 target_phys_addr_t iopte;
220 target_phys_addr_t pa = addr;
223 iopte = s->regs[IOMMU_BASE] << 4;
225 iopte += (addr >> (PAGE_SHIFT - 2)) & ~3;
226 cpu_physical_memory_read(iopte, (uint8_t *)&ret, 4);
228 DPRINTF("get flags addr " TARGET_FMT_plx " => pte " TARGET_FMT_plx
229 ", *pte = %x\n", pa, iopte, ret);
234 static target_phys_addr_t iommu_translate_pa(IOMMUState *s,
235 target_phys_addr_t addr,
239 target_phys_addr_t pa;
242 pa = ((pte & IOPTE_PAGE) << 4) + (addr & PAGE_MASK);
243 DPRINTF("xlate dva " TARGET_FMT_plx " => pa " TARGET_FMT_plx
244 " (iopte = %x)\n", addr, pa, tmppte);
249 static void iommu_bad_addr(IOMMUState *s, target_phys_addr_t addr,
252 DPRINTF("bad addr " TARGET_FMT_plx "\n", addr);
253 s->regs[IOMMU_AFSR] = IOMMU_AFSR_ERR | IOMMU_AFSR_LE | IOMMU_AFSR_RESV |
256 s->regs[IOMMU_AFSR] |= IOMMU_AFSR_RD;
257 s->regs[IOMMU_AFAR] = addr;
260 void sparc_iommu_memory_rw(void *opaque, target_phys_addr_t addr,
261 uint8_t *buf, int len, int is_write)
265 target_phys_addr_t page, phys_addr;
268 page = addr & TARGET_PAGE_MASK;
269 l = (page + TARGET_PAGE_SIZE) - addr;
272 flags = iommu_page_get_flags(opaque, page);
273 if (!(flags & IOPTE_VALID)) {
274 iommu_bad_addr(opaque, page, is_write);
277 phys_addr = iommu_translate_pa(opaque, addr, flags);
279 if (!(flags & IOPTE_WRITE)) {
280 iommu_bad_addr(opaque, page, is_write);
283 cpu_physical_memory_write(phys_addr, buf, len);
285 cpu_physical_memory_read(phys_addr, buf, len);
293 static void iommu_save(QEMUFile *f, void *opaque)
295 IOMMUState *s = opaque;
298 for (i = 0; i < IOMMU_NREGS; i++)
299 qemu_put_be32s(f, &s->regs[i]);
300 qemu_put_be64s(f, &s->iostart);
303 static int iommu_load(QEMUFile *f, void *opaque, int version_id)
305 IOMMUState *s = opaque;
311 for (i = 0; i < IOMMU_NREGS; i++)
312 qemu_get_be32s(f, &s->regs[i]);
313 qemu_get_be64s(f, &s->iostart);
318 static void iommu_reset(void *opaque)
320 IOMMUState *s = opaque;
322 memset(s->regs, 0, IOMMU_NREGS * 4);
324 s->regs[IOMMU_CTRL] = s->version;
325 s->regs[IOMMU_ARBEN] = IOMMU_MID;
326 s->regs[IOMMU_AFSR] = IOMMU_AFSR_RESV;
329 void *iommu_init(target_phys_addr_t addr, uint32_t version)
334 s = qemu_mallocz(sizeof(IOMMUState));
339 s->version = version;
341 iommu_io_memory = cpu_register_io_memory(0, iommu_mem_read,
343 cpu_register_physical_memory(addr, IOMMU_NREGS * 4, iommu_io_memory);
345 register_savevm("iommu", addr, 2, iommu_save, iommu_load, s);
346 qemu_register_reset(iommu_reset, s);