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/units.h" |
22 | #include "qemu/error-report.h" |
23 | #include "qemu-common.h" |
24 | #include "cpu.h" |
25 | #include "hw/sysbus.h" |
26 | #include "hw/irq.h" |
27 | #include "hw/block/flash.h" |
28 | #include "sysemu/sysemu.h" |
29 | #include "sysemu/qtest.h" |
30 | #include "sysemu/reset.h" |
31 | #include "hw/boards.h" |
32 | #include "hw/loader.h" |
33 | #include "hw/qdev-properties.h" |
34 | #include "elf.h" |
35 | #include "milkymist-hw.h" |
36 | #include "hw/display/milkymist_tmu2.h" |
37 | #include "lm32.h" |
38 | #include "exec/address-spaces.h" |
39 | |
40 | #define BIOS_FILENAME "mmone-bios.bin" |
41 | #define BIOS_OFFSET 0x00860000 |
42 | #define BIOS_SIZE (512 * KiB) |
43 | #define KERNEL_LOAD_ADDR 0x40000000 |
44 | |
45 | typedef struct { |
46 | LM32CPU *cpu; |
47 | hwaddr bootstrap_pc; |
48 | hwaddr flash_base; |
49 | hwaddr initrd_base; |
50 | size_t initrd_size; |
51 | hwaddr cmdline_base; |
52 | } ResetInfo; |
53 | |
54 | static void cpu_irq_handler(void *opaque, int irq, int level) |
55 | { |
56 | LM32CPU *cpu = opaque; |
57 | CPUState *cs = CPU(cpu); |
58 | |
59 | if (level) { |
60 | cpu_interrupt(cs, CPU_INTERRUPT_HARD); |
61 | } else { |
62 | cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD); |
63 | } |
64 | } |
65 | |
66 | static void main_cpu_reset(void *opaque) |
67 | { |
68 | ResetInfo *reset_info = opaque; |
69 | CPULM32State *env = &reset_info->cpu->env; |
70 | |
71 | cpu_reset(CPU(reset_info->cpu)); |
72 | |
73 | /* init defaults */ |
74 | env->pc = reset_info->bootstrap_pc; |
75 | env->regs[R_R1] = reset_info->cmdline_base; |
76 | env->regs[R_R2] = reset_info->initrd_base; |
77 | env->regs[R_R3] = reset_info->initrd_base + reset_info->initrd_size; |
78 | env->eba = reset_info->flash_base; |
79 | env->deba = reset_info->flash_base; |
80 | } |
81 | |
82 | static void |
83 | milkymist_init(MachineState *machine) |
84 | { |
85 | const char *kernel_filename = machine->kernel_filename; |
86 | const char *kernel_cmdline = machine->kernel_cmdline; |
87 | const char *initrd_filename = machine->initrd_filename; |
88 | LM32CPU *cpu; |
89 | CPULM32State *env; |
90 | int kernel_size; |
91 | DriveInfo *dinfo; |
92 | MemoryRegion *address_space_mem = get_system_memory(); |
93 | MemoryRegion *phys_sdram = g_new(MemoryRegion, 1); |
94 | qemu_irq irq[32]; |
95 | int i; |
96 | char *bios_filename; |
97 | ResetInfo *reset_info; |
98 | |
99 | /* memory map */ |
100 | hwaddr flash_base = 0x00000000; |
101 | size_t flash_sector_size = 128 * KiB; |
102 | size_t flash_size = 32 * MiB; |
103 | hwaddr sdram_base = 0x40000000; |
104 | size_t sdram_size = 128 * MiB; |
105 | |
106 | hwaddr initrd_base = sdram_base + 0x1002000; |
107 | hwaddr cmdline_base = sdram_base + 0x1000000; |
108 | size_t initrd_max = sdram_size - 0x1002000; |
109 | |
110 | reset_info = g_malloc0(sizeof(ResetInfo)); |
111 | |
112 | cpu = LM32_CPU(cpu_create(machine->cpu_type)); |
113 | |
114 | env = &cpu->env; |
115 | reset_info->cpu = cpu; |
116 | |
117 | cpu_lm32_set_phys_msb_ignore(env, 1); |
118 | |
119 | memory_region_allocate_system_memory(phys_sdram, NULL, "milkymist.sdram" , |
120 | sdram_size); |
121 | memory_region_add_subregion(address_space_mem, sdram_base, phys_sdram); |
122 | |
123 | dinfo = drive_get(IF_PFLASH, 0, 0); |
124 | /* Numonyx JS28F256J3F105 */ |
125 | pflash_cfi01_register(flash_base, "milkymist.flash" , flash_size, |
126 | dinfo ? blk_by_legacy_dinfo(dinfo) : NULL, |
127 | flash_sector_size, 2, 0x00, 0x89, 0x00, 0x1d, 1); |
128 | |
129 | /* create irq lines */ |
130 | env->pic_state = lm32_pic_init(qemu_allocate_irq(cpu_irq_handler, cpu, 0)); |
131 | for (i = 0; i < 32; i++) { |
132 | irq[i] = qdev_get_gpio_in(env->pic_state, i); |
133 | } |
134 | |
135 | /* load bios rom */ |
136 | if (bios_name == NULL) { |
137 | bios_name = BIOS_FILENAME; |
138 | } |
139 | bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name); |
140 | |
141 | if (bios_filename) { |
142 | if (load_image_targphys(bios_filename, BIOS_OFFSET, BIOS_SIZE) < 0) { |
143 | error_report("could not load bios '%s'" , bios_filename); |
144 | exit(1); |
145 | } |
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 | error_report("could not load Milkymist One bios '%s'" , bios_name); |
153 | exit(1); |
154 | } |
155 | g_free(bios_filename); |
156 | |
157 | milkymist_uart_create(0x60000000, irq[0], serial_hd(0)); |
158 | milkymist_sysctl_create(0x60001000, irq[1], irq[2], irq[3], |
159 | 80000000, 0x10014d31, 0x0000041f, 0x00000001); |
160 | milkymist_hpdmc_create(0x60002000); |
161 | milkymist_vgafb_create(0x60003000, 0x40000000, 0x0fffffff); |
162 | milkymist_memcard_create(0x60004000); |
163 | milkymist_ac97_create(0x60005000, irq[4], irq[5], irq[6], irq[7]); |
164 | milkymist_pfpu_create(0x60006000, irq[8]); |
165 | if (machine->enable_graphics) { |
166 | milkymist_tmu2_create(0x60007000, irq[9]); |
167 | } |
168 | milkymist_minimac2_create(0x60008000, 0x30000000, irq[10], irq[11]); |
169 | milkymist_softusb_create(0x6000f000, irq[15], |
170 | 0x20000000, 0x1000, 0x20020000, 0x2000); |
171 | |
172 | /* make sure juart isn't the first chardev */ |
173 | env->juart_state = lm32_juart_init(serial_hd(1)); |
174 | |
175 | if (kernel_filename) { |
176 | uint64_t entry; |
177 | |
178 | /* Boots a kernel elf binary. */ |
179 | kernel_size = load_elf(kernel_filename, NULL, NULL, NULL, |
180 | &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 | error_report("could not load kernel '%s'" , kernel_filename); |
192 | exit(1); |
193 | } |
194 | } |
195 | |
196 | if (kernel_cmdline && strlen(kernel_cmdline)) { |
197 | pstrcpy_targphys("cmdline" , cmdline_base, TARGET_PAGE_SIZE, |
198 | kernel_cmdline); |
199 | reset_info->cmdline_base = (uint32_t)cmdline_base; |
200 | } |
201 | |
202 | if (initrd_filename) { |
203 | size_t initrd_size; |
204 | initrd_size = load_image_targphys(initrd_filename, initrd_base, |
205 | initrd_max); |
206 | reset_info->initrd_base = (uint32_t)initrd_base; |
207 | reset_info->initrd_size = (uint32_t)initrd_size; |
208 | } |
209 | |
210 | qemu_register_reset(main_cpu_reset, reset_info); |
211 | } |
212 | |
213 | static void milkymist_machine_init(MachineClass *mc) |
214 | { |
215 | mc->desc = "Milkymist One" ; |
216 | mc->init = milkymist_init; |
217 | mc->is_default = 0; |
218 | mc->default_cpu_type = LM32_CPU_TYPE_NAME("lm32-full" ); |
219 | } |
220 | |
221 | DEFINE_MACHINE("milkymist" , milkymist_machine_init) |
222 | |