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1 | 9ee6e8bb | pbrook | /*
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2 | 9ee6e8bb | pbrook | * ARMV7M System emulation.
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3 | 9ee6e8bb | pbrook | *
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4 | 9ee6e8bb | pbrook | * Copyright (c) 2006-2007 CodeSourcery.
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5 | 9ee6e8bb | pbrook | * Written by Paul Brook
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6 | 9ee6e8bb | pbrook | *
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7 | 9ee6e8bb | pbrook | * This code is licenced under the GPL.
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8 | 9ee6e8bb | pbrook | */
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9 | 9ee6e8bb | pbrook | |
10 | fe7e8758 | Paul Brook | #include "sysbus.h" |
11 | 87ecb68b | pbrook | #include "arm-misc.h" |
12 | 87ecb68b | pbrook | #include "sysemu.h" |
13 | ca20cf32 | Blue Swirl | #include "loader.h" |
14 | ca20cf32 | Blue Swirl | #include "elf.h" |
15 | 9ee6e8bb | pbrook | |
16 | 9ee6e8bb | pbrook | /* Bitbanded IO. Each word corresponds to a single bit. */
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17 | 9ee6e8bb | pbrook | |
18 | 9ee6e8bb | pbrook | /* Get the byte address of the real memory for a bitband acess. */
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19 | 8da3ff18 | pbrook | static inline uint32_t bitband_addr(void * opaque, uint32_t addr) |
20 | 9ee6e8bb | pbrook | { |
21 | 9ee6e8bb | pbrook | uint32_t res; |
22 | 9ee6e8bb | pbrook | |
23 | 8da3ff18 | pbrook | res = *(uint32_t *)opaque; |
24 | 9ee6e8bb | pbrook | res |= (addr & 0x1ffffff) >> 5; |
25 | 9ee6e8bb | pbrook | return res;
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26 | 9ee6e8bb | pbrook | |
27 | 9ee6e8bb | pbrook | } |
28 | 9ee6e8bb | pbrook | |
29 | c227f099 | Anthony Liguori | static uint32_t bitband_readb(void *opaque, target_phys_addr_t offset) |
30 | 9ee6e8bb | pbrook | { |
31 | 9ee6e8bb | pbrook | uint8_t v; |
32 | 8da3ff18 | pbrook | cpu_physical_memory_read(bitband_addr(opaque, offset), &v, 1);
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33 | 9ee6e8bb | pbrook | return (v & (1 << ((offset >> 2) & 7))) != 0; |
34 | 9ee6e8bb | pbrook | } |
35 | 9ee6e8bb | pbrook | |
36 | c227f099 | Anthony Liguori | static void bitband_writeb(void *opaque, target_phys_addr_t offset, |
37 | 9ee6e8bb | pbrook | uint32_t value) |
38 | 9ee6e8bb | pbrook | { |
39 | 9ee6e8bb | pbrook | uint32_t addr; |
40 | 9ee6e8bb | pbrook | uint8_t mask; |
41 | 9ee6e8bb | pbrook | uint8_t v; |
42 | 8da3ff18 | pbrook | addr = bitband_addr(opaque, offset); |
43 | 9ee6e8bb | pbrook | mask = (1 << ((offset >> 2) & 7)); |
44 | 9ee6e8bb | pbrook | cpu_physical_memory_read(addr, &v, 1);
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45 | 9ee6e8bb | pbrook | if (value & 1) |
46 | 9ee6e8bb | pbrook | v |= mask; |
47 | 9ee6e8bb | pbrook | else
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48 | 9ee6e8bb | pbrook | v &= ~mask; |
49 | 9ee6e8bb | pbrook | cpu_physical_memory_write(addr, &v, 1);
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50 | 9ee6e8bb | pbrook | } |
51 | 9ee6e8bb | pbrook | |
52 | c227f099 | Anthony Liguori | static uint32_t bitband_readw(void *opaque, target_phys_addr_t offset) |
53 | 9ee6e8bb | pbrook | { |
54 | 9ee6e8bb | pbrook | uint32_t addr; |
55 | 9ee6e8bb | pbrook | uint16_t mask; |
56 | 9ee6e8bb | pbrook | uint16_t v; |
57 | 8da3ff18 | pbrook | addr = bitband_addr(opaque, offset) & ~1;
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58 | 9ee6e8bb | pbrook | mask = (1 << ((offset >> 2) & 15)); |
59 | 9ee6e8bb | pbrook | mask = tswap16(mask); |
60 | 9ee6e8bb | pbrook | cpu_physical_memory_read(addr, (uint8_t *)&v, 2);
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61 | 9ee6e8bb | pbrook | return (v & mask) != 0; |
62 | 9ee6e8bb | pbrook | } |
63 | 9ee6e8bb | pbrook | |
64 | c227f099 | Anthony Liguori | static void bitband_writew(void *opaque, target_phys_addr_t offset, |
65 | 9ee6e8bb | pbrook | uint32_t value) |
66 | 9ee6e8bb | pbrook | { |
67 | 9ee6e8bb | pbrook | uint32_t addr; |
68 | 9ee6e8bb | pbrook | uint16_t mask; |
69 | 9ee6e8bb | pbrook | uint16_t v; |
70 | 8da3ff18 | pbrook | addr = bitband_addr(opaque, offset) & ~1;
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71 | 9ee6e8bb | pbrook | mask = (1 << ((offset >> 2) & 15)); |
72 | 9ee6e8bb | pbrook | mask = tswap16(mask); |
73 | 9ee6e8bb | pbrook | cpu_physical_memory_read(addr, (uint8_t *)&v, 2);
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74 | 9ee6e8bb | pbrook | if (value & 1) |
75 | 9ee6e8bb | pbrook | v |= mask; |
76 | 9ee6e8bb | pbrook | else
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77 | 9ee6e8bb | pbrook | v &= ~mask; |
78 | 9ee6e8bb | pbrook | cpu_physical_memory_write(addr, (uint8_t *)&v, 2);
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79 | 9ee6e8bb | pbrook | } |
80 | 9ee6e8bb | pbrook | |
81 | c227f099 | Anthony Liguori | static uint32_t bitband_readl(void *opaque, target_phys_addr_t offset) |
82 | 9ee6e8bb | pbrook | { |
83 | 9ee6e8bb | pbrook | uint32_t addr; |
84 | 9ee6e8bb | pbrook | uint32_t mask; |
85 | 9ee6e8bb | pbrook | uint32_t v; |
86 | 8da3ff18 | pbrook | addr = bitband_addr(opaque, offset) & ~3;
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87 | 9ee6e8bb | pbrook | mask = (1 << ((offset >> 2) & 31)); |
88 | 9ee6e8bb | pbrook | mask = tswap32(mask); |
89 | 9ee6e8bb | pbrook | cpu_physical_memory_read(addr, (uint8_t *)&v, 4);
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90 | 9ee6e8bb | pbrook | return (v & mask) != 0; |
91 | 9ee6e8bb | pbrook | } |
92 | 9ee6e8bb | pbrook | |
93 | c227f099 | Anthony Liguori | static void bitband_writel(void *opaque, target_phys_addr_t offset, |
94 | 9ee6e8bb | pbrook | uint32_t value) |
95 | 9ee6e8bb | pbrook | { |
96 | 9ee6e8bb | pbrook | uint32_t addr; |
97 | 9ee6e8bb | pbrook | uint32_t mask; |
98 | 9ee6e8bb | pbrook | uint32_t v; |
99 | 8da3ff18 | pbrook | addr = bitband_addr(opaque, offset) & ~3;
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100 | 9ee6e8bb | pbrook | mask = (1 << ((offset >> 2) & 31)); |
101 | 9ee6e8bb | pbrook | mask = tswap32(mask); |
102 | 9ee6e8bb | pbrook | cpu_physical_memory_read(addr, (uint8_t *)&v, 4);
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103 | 9ee6e8bb | pbrook | if (value & 1) |
104 | 9ee6e8bb | pbrook | v |= mask; |
105 | 9ee6e8bb | pbrook | else
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106 | 9ee6e8bb | pbrook | v &= ~mask; |
107 | 9ee6e8bb | pbrook | cpu_physical_memory_write(addr, (uint8_t *)&v, 4);
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108 | 9ee6e8bb | pbrook | } |
109 | 9ee6e8bb | pbrook | |
110 | d60efc6b | Blue Swirl | static CPUReadMemoryFunc * const bitband_readfn[] = { |
111 | 9ee6e8bb | pbrook | bitband_readb, |
112 | 9ee6e8bb | pbrook | bitband_readw, |
113 | 9ee6e8bb | pbrook | bitband_readl |
114 | 9ee6e8bb | pbrook | }; |
115 | 9ee6e8bb | pbrook | |
116 | d60efc6b | Blue Swirl | static CPUWriteMemoryFunc * const bitband_writefn[] = { |
117 | 9ee6e8bb | pbrook | bitband_writeb, |
118 | 9ee6e8bb | pbrook | bitband_writew, |
119 | 9ee6e8bb | pbrook | bitband_writel |
120 | 9ee6e8bb | pbrook | }; |
121 | 9ee6e8bb | pbrook | |
122 | 40905a6a | Paul Brook | typedef struct { |
123 | 40905a6a | Paul Brook | SysBusDevice busdev; |
124 | 40905a6a | Paul Brook | uint32_t base; |
125 | 40905a6a | Paul Brook | } BitBandState; |
126 | 40905a6a | Paul Brook | |
127 | 81a322d4 | Gerd Hoffmann | static int bitband_init(SysBusDevice *dev) |
128 | 9ee6e8bb | pbrook | { |
129 | 40905a6a | Paul Brook | BitBandState *s = FROM_SYSBUS(BitBandState, dev); |
130 | 9ee6e8bb | pbrook | int iomemtype;
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131 | 9ee6e8bb | pbrook | |
132 | 1eed09cb | Avi Kivity | iomemtype = cpu_register_io_memory(bitband_readfn, bitband_writefn, |
133 | 40905a6a | Paul Brook | &s->base); |
134 | 40905a6a | Paul Brook | sysbus_init_mmio(dev, 0x02000000, iomemtype);
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135 | 81a322d4 | Gerd Hoffmann | return 0; |
136 | 40905a6a | Paul Brook | } |
137 | 40905a6a | Paul Brook | |
138 | 40905a6a | Paul Brook | static void armv7m_bitband_init(void) |
139 | 40905a6a | Paul Brook | { |
140 | 40905a6a | Paul Brook | DeviceState *dev; |
141 | 40905a6a | Paul Brook | |
142 | 40905a6a | Paul Brook | dev = qdev_create(NULL, "ARM,bitband-memory"); |
143 | ee6847d1 | Gerd Hoffmann | qdev_prop_set_uint32(dev, "base", 0x20000000); |
144 | e23a1b33 | Markus Armbruster | qdev_init_nofail(dev); |
145 | 40905a6a | Paul Brook | sysbus_mmio_map(sysbus_from_qdev(dev), 0, 0x22000000); |
146 | 40905a6a | Paul Brook | |
147 | 40905a6a | Paul Brook | dev = qdev_create(NULL, "ARM,bitband-memory"); |
148 | ee6847d1 | Gerd Hoffmann | qdev_prop_set_uint32(dev, "base", 0x40000000); |
149 | e23a1b33 | Markus Armbruster | qdev_init_nofail(dev); |
150 | 40905a6a | Paul Brook | sysbus_mmio_map(sysbus_from_qdev(dev), 0, 0x42000000); |
151 | 9ee6e8bb | pbrook | } |
152 | 9ee6e8bb | pbrook | |
153 | 9ee6e8bb | pbrook | /* Board init. */
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154 | 9ee6e8bb | pbrook | /* Init CPU and memory for a v7-M based board.
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155 | 9ee6e8bb | pbrook | flash_size and sram_size are in kb.
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156 | 9ee6e8bb | pbrook | Returns the NVIC array. */
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157 | 9ee6e8bb | pbrook | |
158 | 9ee6e8bb | pbrook | qemu_irq *armv7m_init(int flash_size, int sram_size, |
159 | 9ee6e8bb | pbrook | const char *kernel_filename, const char *cpu_model) |
160 | 9ee6e8bb | pbrook | { |
161 | 9ee6e8bb | pbrook | CPUState *env; |
162 | fe7e8758 | Paul Brook | DeviceState *nvic; |
163 | fe7e8758 | Paul Brook | /* FIXME: make this local state. */
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164 | fe7e8758 | Paul Brook | static qemu_irq pic[64]; |
165 | fe7e8758 | Paul Brook | qemu_irq *cpu_pic; |
166 | 9ee6e8bb | pbrook | uint32_t pc; |
167 | 9ee6e8bb | pbrook | int image_size;
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168 | 9ee6e8bb | pbrook | uint64_t entry; |
169 | 9ee6e8bb | pbrook | uint64_t lowaddr; |
170 | fe7e8758 | Paul Brook | int i;
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171 | ca20cf32 | Blue Swirl | int big_endian;
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172 | 9ee6e8bb | pbrook | |
173 | 9ee6e8bb | pbrook | flash_size *= 1024;
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174 | 9ee6e8bb | pbrook | sram_size *= 1024;
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175 | 9ee6e8bb | pbrook | |
176 | 9ee6e8bb | pbrook | if (!cpu_model)
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177 | 9ee6e8bb | pbrook | cpu_model = "cortex-m3";
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178 | 9ee6e8bb | pbrook | env = cpu_init(cpu_model); |
179 | 9ee6e8bb | pbrook | if (!env) {
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180 | 9ee6e8bb | pbrook | fprintf(stderr, "Unable to find CPU definition\n");
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181 | 9ee6e8bb | pbrook | exit(1);
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182 | 9ee6e8bb | pbrook | } |
183 | 9ee6e8bb | pbrook | |
184 | 9ee6e8bb | pbrook | #if 0
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185 | 9ee6e8bb | pbrook | /* > 32Mb SRAM gets complicated because it overlaps the bitband area.
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186 | 9ee6e8bb | pbrook | We don't have proper commandline options, so allocate half of memory
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187 | 9ee6e8bb | pbrook | as SRAM, up to a maximum of 32Mb, and the rest as code. */
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188 | 9ee6e8bb | pbrook | if (ram_size > (512 + 32) * 1024 * 1024)
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189 | 9ee6e8bb | pbrook | ram_size = (512 + 32) * 1024 * 1024;
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190 | 9ee6e8bb | pbrook | sram_size = (ram_size / 2) & TARGET_PAGE_MASK;
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191 | 9ee6e8bb | pbrook | if (sram_size > 32 * 1024 * 1024)
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192 | 9ee6e8bb | pbrook | sram_size = 32 * 1024 * 1024;
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193 | 9ee6e8bb | pbrook | code_size = ram_size - sram_size;
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194 | 9ee6e8bb | pbrook | #endif
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195 | 9ee6e8bb | pbrook | |
196 | 9ee6e8bb | pbrook | /* Flash programming is done via the SCU, so pretend it is ROM. */
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197 | dcac9679 | pbrook | cpu_register_physical_memory(0, flash_size,
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198 | dcac9679 | pbrook | qemu_ram_alloc(flash_size) | IO_MEM_ROM); |
199 | 9ee6e8bb | pbrook | cpu_register_physical_memory(0x20000000, sram_size,
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200 | dcac9679 | pbrook | qemu_ram_alloc(sram_size) | IO_MEM_RAM); |
201 | 9ee6e8bb | pbrook | armv7m_bitband_init(); |
202 | 9ee6e8bb | pbrook | |
203 | fe7e8758 | Paul Brook | nvic = qdev_create(NULL, "armv7m_nvic"); |
204 | bdb11366 | Paul Brook | env->v7m.nvic = nvic; |
205 | e23a1b33 | Markus Armbruster | qdev_init_nofail(nvic); |
206 | fe7e8758 | Paul Brook | cpu_pic = arm_pic_init_cpu(env); |
207 | fe7e8758 | Paul Brook | sysbus_connect_irq(sysbus_from_qdev(nvic), 0, cpu_pic[ARM_PIC_CPU_IRQ]);
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208 | fe7e8758 | Paul Brook | for (i = 0; i < 64; i++) { |
209 | 067a3ddc | Paul Brook | pic[i] = qdev_get_gpio_in(nvic, i); |
210 | fe7e8758 | Paul Brook | } |
211 | 9ee6e8bb | pbrook | |
212 | ca20cf32 | Blue Swirl | #ifdef TARGET_WORDS_BIGENDIAN
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213 | ca20cf32 | Blue Swirl | big_endian = 1;
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214 | ca20cf32 | Blue Swirl | #else
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215 | ca20cf32 | Blue Swirl | big_endian = 0;
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216 | ca20cf32 | Blue Swirl | #endif
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217 | ca20cf32 | Blue Swirl | |
218 | ca20cf32 | Blue Swirl | image_size = load_elf(kernel_filename, 0, &entry, &lowaddr, NULL, |
219 | ca20cf32 | Blue Swirl | big_endian, ELF_MACHINE, 1);
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220 | 9ee6e8bb | pbrook | if (image_size < 0) { |
221 | dcac9679 | pbrook | image_size = load_image_targphys(kernel_filename, 0, flash_size);
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222 | 9ee6e8bb | pbrook | lowaddr = 0;
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223 | 9ee6e8bb | pbrook | } |
224 | 9ee6e8bb | pbrook | if (image_size < 0) { |
225 | 9ee6e8bb | pbrook | fprintf(stderr, "qemu: could not load kernel '%s'\n",
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226 | 9ee6e8bb | pbrook | kernel_filename); |
227 | 9ee6e8bb | pbrook | exit(1);
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228 | 9ee6e8bb | pbrook | } |
229 | 9ee6e8bb | pbrook | |
230 | 9ee6e8bb | pbrook | /* If the image was loaded at address zero then assume it is a
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231 | 9ee6e8bb | pbrook | regular ROM image and perform the normal CPU reset sequence.
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232 | 9ee6e8bb | pbrook | Otherwise jump directly to the entry point. */
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233 | 9ee6e8bb | pbrook | if (lowaddr == 0) { |
234 | 44654490 | pbrook | env->regs[13] = ldl_phys(0); |
235 | 44654490 | pbrook | pc = ldl_phys(4);
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236 | 9ee6e8bb | pbrook | } else {
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237 | 9ee6e8bb | pbrook | pc = entry; |
238 | 9ee6e8bb | pbrook | } |
239 | 9ee6e8bb | pbrook | env->thumb = pc & 1;
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240 | 9ee6e8bb | pbrook | env->regs[15] = pc & ~1; |
241 | 9ee6e8bb | pbrook | |
242 | 9ee6e8bb | pbrook | /* Hack to map an additional page of ram at the top of the address
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243 | 9ee6e8bb | pbrook | space. This stops qemu complaining about executing code outside RAM
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244 | 9ee6e8bb | pbrook | when returning from an exception. */
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245 | dcac9679 | pbrook | cpu_register_physical_memory(0xfffff000, 0x1000, |
246 | dcac9679 | pbrook | qemu_ram_alloc(0x1000) | IO_MEM_RAM);
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247 | 9ee6e8bb | pbrook | |
248 | 9ee6e8bb | pbrook | return pic;
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249 | 9ee6e8bb | pbrook | } |
250 | 40905a6a | Paul Brook | |
251 | ee6847d1 | Gerd Hoffmann | static SysBusDeviceInfo bitband_info = {
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252 | ee6847d1 | Gerd Hoffmann | .init = bitband_init, |
253 | ee6847d1 | Gerd Hoffmann | .qdev.name = "ARM,bitband-memory",
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254 | ee6847d1 | Gerd Hoffmann | .qdev.size = sizeof(BitBandState),
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255 | ee6847d1 | Gerd Hoffmann | .qdev.props = (Property[]) { |
256 | 1832efa2 | Gerd Hoffmann | DEFINE_PROP_UINT32("base", BitBandState, base, 0), |
257 | 1832efa2 | Gerd Hoffmann | DEFINE_PROP_END_OF_LIST(), |
258 | ee6847d1 | Gerd Hoffmann | } |
259 | ee6847d1 | Gerd Hoffmann | }; |
260 | ee6847d1 | Gerd Hoffmann | |
261 | 40905a6a | Paul Brook | static void armv7m_register_devices(void) |
262 | 40905a6a | Paul Brook | { |
263 | ee6847d1 | Gerd Hoffmann | sysbus_register_withprop(&bitband_info); |
264 | 40905a6a | Paul Brook | } |
265 | 40905a6a | Paul Brook | |
266 | 40905a6a | Paul Brook | device_init(armv7m_register_devices) |