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;
118 static uint32_t iommu_mem_readl(void *opaque, target_phys_addr_t addr)
120 IOMMUState *s = opaque;
121 target_phys_addr_t saddr;
124 saddr = (addr - s->addr) >> 2;
127 ret = s->regs[saddr];
131 ret = s->regs[saddr];
132 qemu_irq_lower(s->irq);
135 DPRINTF("read reg[%d] = %x\n", (int)saddr, ret);
139 static void iommu_mem_writel(void *opaque, target_phys_addr_t addr,
142 IOMMUState *s = opaque;
143 target_phys_addr_t saddr;
145 saddr = (addr - s->addr) >> 2;
146 DPRINTF("write reg[%d] = %x\n", (int)saddr, val);
149 switch (val & IOMMU_CTRL_RNGE) {
150 case IOMMU_RNGE_16MB:
151 s->iostart = 0xffffffffff000000ULL;
153 case IOMMU_RNGE_32MB:
154 s->iostart = 0xfffffffffe000000ULL;
156 case IOMMU_RNGE_64MB:
157 s->iostart = 0xfffffffffc000000ULL;
159 case IOMMU_RNGE_128MB:
160 s->iostart = 0xfffffffff8000000ULL;
162 case IOMMU_RNGE_256MB:
163 s->iostart = 0xfffffffff0000000ULL;
165 case IOMMU_RNGE_512MB:
166 s->iostart = 0xffffffffe0000000ULL;
169 s->iostart = 0xffffffffc0000000ULL;
173 s->iostart = 0xffffffff80000000ULL;
176 DPRINTF("iostart = " TARGET_FMT_plx "\n", s->iostart);
177 s->regs[saddr] = ((val & IOMMU_CTRL_MASK) | s->version);
180 s->regs[saddr] = val & IOMMU_BASE_MASK;
183 DPRINTF("tlb flush %x\n", val);
184 s->regs[saddr] = val & IOMMU_TLBFLUSH_MASK;
187 DPRINTF("page flush %x\n", val);
188 s->regs[saddr] = val & IOMMU_PGFLUSH_MASK;
191 s->regs[saddr] = val;
192 qemu_irq_lower(s->irq);
195 s->regs[saddr] = (val & IOMMU_AFSR_MASK) | IOMMU_AFSR_RESV;
196 qemu_irq_lower(s->irq);
202 s->regs[saddr] = val & IOMMU_SBCFG_MASK;
205 // XXX implement SBus probing: fault when reading unmapped
206 // addresses, fault cause and address stored to MMU/IOMMU
207 s->regs[saddr] = (val & IOMMU_ARBEN_MASK) | IOMMU_MID;
210 s->regs[saddr] = val;
215 static CPUReadMemoryFunc *iommu_mem_read[3] = {
221 static CPUWriteMemoryFunc *iommu_mem_write[3] = {
227 static uint32_t iommu_page_get_flags(IOMMUState *s, target_phys_addr_t addr)
230 target_phys_addr_t iopte;
232 target_phys_addr_t pa = addr;
235 iopte = s->regs[IOMMU_BASE] << 4;
237 iopte += (addr >> (PAGE_SHIFT - 2)) & ~3;
238 cpu_physical_memory_read(iopte, (uint8_t *)&ret, 4);
240 DPRINTF("get flags addr " TARGET_FMT_plx " => pte " TARGET_FMT_plx
241 ", *pte = %x\n", pa, iopte, ret);
246 static target_phys_addr_t iommu_translate_pa(IOMMUState *s,
247 target_phys_addr_t addr,
251 target_phys_addr_t pa;
254 pa = ((pte & IOPTE_PAGE) << 4) + (addr & PAGE_MASK);
255 DPRINTF("xlate dva " TARGET_FMT_plx " => pa " TARGET_FMT_plx
256 " (iopte = %x)\n", addr, pa, tmppte);
261 static void iommu_bad_addr(IOMMUState *s, target_phys_addr_t addr,
264 DPRINTF("bad addr " TARGET_FMT_plx "\n", addr);
265 s->regs[IOMMU_AFSR] = IOMMU_AFSR_ERR | IOMMU_AFSR_LE | IOMMU_AFSR_RESV |
268 s->regs[IOMMU_AFSR] |= IOMMU_AFSR_RD;
269 s->regs[IOMMU_AFAR] = addr;
270 qemu_irq_raise(s->irq);
273 void sparc_iommu_memory_rw(void *opaque, target_phys_addr_t addr,
274 uint8_t *buf, int len, int is_write)
278 target_phys_addr_t page, phys_addr;
281 page = addr & TARGET_PAGE_MASK;
282 l = (page + TARGET_PAGE_SIZE) - addr;
285 flags = iommu_page_get_flags(opaque, page);
286 if (!(flags & IOPTE_VALID)) {
287 iommu_bad_addr(opaque, page, is_write);
290 phys_addr = iommu_translate_pa(opaque, addr, flags);
292 if (!(flags & IOPTE_WRITE)) {
293 iommu_bad_addr(opaque, page, is_write);
296 cpu_physical_memory_write(phys_addr, buf, len);
298 cpu_physical_memory_read(phys_addr, buf, len);
306 static void iommu_save(QEMUFile *f, void *opaque)
308 IOMMUState *s = opaque;
311 for (i = 0; i < IOMMU_NREGS; i++)
312 qemu_put_be32s(f, &s->regs[i]);
313 qemu_put_be64s(f, &s->iostart);
316 static int iommu_load(QEMUFile *f, void *opaque, int version_id)
318 IOMMUState *s = opaque;
324 for (i = 0; i < IOMMU_NREGS; i++)
325 qemu_get_be32s(f, &s->regs[i]);
326 qemu_get_be64s(f, &s->iostart);
331 static void iommu_reset(void *opaque)
333 IOMMUState *s = opaque;
335 memset(s->regs, 0, IOMMU_NREGS * 4);
337 s->regs[IOMMU_CTRL] = s->version;
338 s->regs[IOMMU_ARBEN] = IOMMU_MID;
339 s->regs[IOMMU_AFSR] = IOMMU_AFSR_RESV;
340 qemu_irq_lower(s->irq);
343 void *iommu_init(target_phys_addr_t addr, uint32_t version, qemu_irq irq)
348 s = qemu_mallocz(sizeof(IOMMUState));
353 s->version = version;
356 iommu_io_memory = cpu_register_io_memory(0, iommu_mem_read,
358 cpu_register_physical_memory(addr, IOMMU_NREGS * 4, iommu_io_memory);
360 register_savevm("iommu", addr, 2, iommu_save, iommu_load, s);
361 qemu_register_reset(iommu_reset, s);