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1 | /* | |
2 | * QEMU model for the Milkymist board. | |
3 | * | |
4 | * Copyright (c) 2010 Michael Walle <michael@walle.cc> | |
5 | * | |
6 | * This library is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU Lesser General Public | |
8 | * License as published by the Free Software Foundation; either | |
9 | * version 2 of the License, or (at your option) any later version. | |
10 | * | |
11 | * This library is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * Lesser General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU Lesser General Public | |
17 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | #include "qemu/osdep.h" | |
21 | #include "qemu-common.h" | |
22 | #include "cpu.h" | |
23 | #include "hw/sysbus.h" | |
24 | #include "hw/hw.h" | |
25 | #include "hw/block/flash.h" | |
26 | #include "sysemu/sysemu.h" | |
27 | #include "sysemu/qtest.h" | |
28 | #include "hw/devices.h" | |
29 | #include "hw/boards.h" | |
30 | #include "hw/loader.h" | |
31 | #include "elf.h" | |
32 | #include "sysemu/block-backend.h" | |
33 | #include "milkymist-hw.h" | |
34 | #include "lm32.h" | |
35 | #include "exec/address-spaces.h" | |
36 | #include "qemu/cutils.h" | |
37 | ||
38 | #define BIOS_FILENAME "mmone-bios.bin" | |
39 | #define BIOS_OFFSET 0x00860000 | |
40 | #define BIOS_SIZE (512*1024) | |
41 | #define KERNEL_LOAD_ADDR 0x40000000 | |
42 | ||
43 | typedef struct { | |
44 | LM32CPU *cpu; | |
45 | hwaddr bootstrap_pc; | |
46 | hwaddr flash_base; | |
47 | hwaddr initrd_base; | |
48 | size_t initrd_size; | |
49 | hwaddr cmdline_base; | |
50 | } ResetInfo; | |
51 | ||
52 | static void cpu_irq_handler(void *opaque, int irq, int level) | |
53 | { | |
54 | LM32CPU *cpu = opaque; | |
55 | CPUState *cs = CPU(cpu); | |
56 | ||
57 | if (level) { | |
58 | cpu_interrupt(cs, CPU_INTERRUPT_HARD); | |
59 | } else { | |
60 | cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD); | |
61 | } | |
62 | } | |
63 | ||
64 | static void main_cpu_reset(void *opaque) | |
65 | { | |
66 | ResetInfo *reset_info = opaque; | |
67 | CPULM32State *env = &reset_info->cpu->env; | |
68 | ||
69 | cpu_reset(CPU(reset_info->cpu)); | |
70 | ||
71 | /* init defaults */ | |
72 | env->pc = reset_info->bootstrap_pc; | |
73 | env->regs[R_R1] = reset_info->cmdline_base; | |
74 | env->regs[R_R2] = reset_info->initrd_base; | |
75 | env->regs[R_R3] = reset_info->initrd_base + reset_info->initrd_size; | |
76 | env->eba = reset_info->flash_base; | |
77 | env->deba = reset_info->flash_base; | |
78 | } | |
79 | ||
80 | static void | |
81 | milkymist_init(MachineState *machine) | |
82 | { | |
83 | const char *cpu_model = machine->cpu_model; | |
84 | const char *kernel_filename = machine->kernel_filename; | |
85 | const char *kernel_cmdline = machine->kernel_cmdline; | |
86 | const char *initrd_filename = machine->initrd_filename; | |
87 | LM32CPU *cpu; | |
88 | CPULM32State *env; | |
89 | int kernel_size; | |
90 | DriveInfo *dinfo; | |
91 | MemoryRegion *address_space_mem = get_system_memory(); | |
92 | MemoryRegion *phys_sdram = g_new(MemoryRegion, 1); | |
93 | qemu_irq irq[32]; | |
94 | int i; | |
95 | char *bios_filename; | |
96 | ResetInfo *reset_info; | |
97 | ||
98 | /* memory map */ | |
99 | hwaddr flash_base = 0x00000000; | |
100 | size_t flash_sector_size = 128 * 1024; | |
101 | size_t flash_size = 32 * 1024 * 1024; | |
102 | hwaddr sdram_base = 0x40000000; | |
103 | size_t sdram_size = 128 * 1024 * 1024; | |
104 | ||
105 | hwaddr initrd_base = sdram_base + 0x1002000; | |
106 | hwaddr cmdline_base = sdram_base + 0x1000000; | |
107 | size_t initrd_max = sdram_size - 0x1002000; | |
108 | ||
109 | reset_info = g_malloc0(sizeof(ResetInfo)); | |
110 | ||
111 | if (cpu_model == NULL) { | |
112 | cpu_model = "lm32-full"; | |
113 | } | |
114 | cpu = LM32_CPU(cpu_generic_init(TYPE_LM32_CPU, cpu_model)); | |
115 | ||
116 | env = &cpu->env; | |
117 | reset_info->cpu = cpu; | |
118 | ||
119 | cpu_lm32_set_phys_msb_ignore(env, 1); | |
120 | ||
121 | memory_region_allocate_system_memory(phys_sdram, NULL, "milkymist.sdram", | |
122 | sdram_size); | |
123 | memory_region_add_subregion(address_space_mem, sdram_base, phys_sdram); | |
124 | ||
125 | dinfo = drive_get(IF_PFLASH, 0, 0); | |
126 | /* Numonyx JS28F256J3F105 */ | |
127 | pflash_cfi01_register(flash_base, NULL, "milkymist.flash", flash_size, | |
128 | dinfo ? blk_by_legacy_dinfo(dinfo) : NULL, | |
129 | flash_sector_size, flash_size / flash_sector_size, | |
130 | 2, 0x00, 0x89, 0x00, 0x1d, 1); | |
131 | ||
132 | /* create irq lines */ | |
133 | env->pic_state = lm32_pic_init(qemu_allocate_irq(cpu_irq_handler, cpu, 0)); | |
134 | for (i = 0; i < 32; i++) { | |
135 | irq[i] = qdev_get_gpio_in(env->pic_state, i); | |
136 | } | |
137 | ||
138 | /* load bios rom */ | |
139 | if (bios_name == NULL) { | |
140 | bios_name = BIOS_FILENAME; | |
141 | } | |
142 | bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name); | |
143 | ||
144 | if (bios_filename) { | |
145 | load_image_targphys(bios_filename, BIOS_OFFSET, BIOS_SIZE); | |
146 | } | |
147 | ||
148 | reset_info->bootstrap_pc = BIOS_OFFSET; | |
149 | ||
150 | /* if no kernel is given no valid bios rom is a fatal error */ | |
151 | if (!kernel_filename && !dinfo && !bios_filename && !qtest_enabled()) { | |
152 | fprintf(stderr, "qemu: could not load Milkymist One bios '%s'\n", | |
153 | bios_name); | |
154 | exit(1); | |
155 | } | |
156 | g_free(bios_filename); | |
157 | ||
158 | milkymist_uart_create(0x60000000, irq[0], serial_hds[0]); | |
159 | milkymist_sysctl_create(0x60001000, irq[1], irq[2], irq[3], | |
160 | 80000000, 0x10014d31, 0x0000041f, 0x00000001); | |
161 | milkymist_hpdmc_create(0x60002000); | |
162 | milkymist_vgafb_create(0x60003000, 0x40000000, 0x0fffffff); | |
163 | milkymist_memcard_create(0x60004000); | |
164 | milkymist_ac97_create(0x60005000, irq[4], irq[5], irq[6], irq[7]); | |
165 | milkymist_pfpu_create(0x60006000, irq[8]); | |
166 | if (machine->enable_graphics) { | |
167 | milkymist_tmu2_create(0x60007000, irq[9]); | |
168 | } | |
169 | milkymist_minimac2_create(0x60008000, 0x30000000, irq[10], irq[11]); | |
170 | milkymist_softusb_create(0x6000f000, irq[15], | |
171 | 0x20000000, 0x1000, 0x20020000, 0x2000); | |
172 | ||
173 | /* make sure juart isn't the first chardev */ | |
174 | env->juart_state = lm32_juart_init(serial_hds[1]); | |
175 | ||
176 | if (kernel_filename) { | |
177 | uint64_t entry; | |
178 | ||
179 | /* Boots a kernel elf binary. */ | |
180 | kernel_size = load_elf(kernel_filename, NULL, NULL, &entry, NULL, NULL, | |
181 | 1, EM_LATTICEMICO32, 0, 0); | |
182 | reset_info->bootstrap_pc = entry; | |
183 | ||
184 | if (kernel_size < 0) { | |
185 | kernel_size = load_image_targphys(kernel_filename, sdram_base, | |
186 | sdram_size); | |
187 | reset_info->bootstrap_pc = sdram_base; | |
188 | } | |
189 | ||
190 | if (kernel_size < 0) { | |
191 | fprintf(stderr, "qemu: could not load kernel '%s'\n", | |
192 | kernel_filename); | |
193 | exit(1); | |
194 | } | |
195 | } | |
196 | ||
197 | if (kernel_cmdline && strlen(kernel_cmdline)) { | |
198 | pstrcpy_targphys("cmdline", cmdline_base, TARGET_PAGE_SIZE, | |
199 | kernel_cmdline); | |
200 | reset_info->cmdline_base = (uint32_t)cmdline_base; | |
201 | } | |
202 | ||
203 | if (initrd_filename) { | |
204 | size_t initrd_size; | |
205 | initrd_size = load_image_targphys(initrd_filename, initrd_base, | |
206 | initrd_max); | |
207 | reset_info->initrd_base = (uint32_t)initrd_base; | |
208 | reset_info->initrd_size = (uint32_t)initrd_size; | |
209 | } | |
210 | ||
211 | qemu_register_reset(main_cpu_reset, reset_info); | |
212 | } | |
213 | ||
214 | static void milkymist_machine_init(MachineClass *mc) | |
215 | { | |
216 | mc->desc = "Milkymist One"; | |
217 | mc->init = milkymist_init; | |
218 | mc->is_default = 0; | |
219 | } | |
220 | ||
221 | DEFINE_MACHINE("milkymist", milkymist_machine_init) |