linux-user: stack_base is now mandatory on all targets
[qemu.git] / hw / milkymist.c
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 "sysbus.h"
21 #include "hw.h"
22 #include "net.h"
23 #include "flash.h"
24 #include "sysemu.h"
25 #include "devices.h"
26 #include "boards.h"
27 #include "loader.h"
28 #include "elf.h"
29 #include "blockdev.h"
30 #include "milkymist-hw.h"
31 #include "lm32.h"
32 #include "exec-memory.h"
33
34 #define BIOS_FILENAME "mmone-bios.bin"
35 #define BIOS_OFFSET 0x00860000
36 #define BIOS_SIZE (512*1024)
37 #define KERNEL_LOAD_ADDR 0x40000000
38
39 typedef struct {
40 CPUState *env;
41 target_phys_addr_t bootstrap_pc;
42 target_phys_addr_t flash_base;
43 target_phys_addr_t initrd_base;
44 size_t initrd_size;
45 target_phys_addr_t cmdline_base;
46 } ResetInfo;
47
48 static void cpu_irq_handler(void *opaque, int irq, int level)
49 {
50 CPUState *env = opaque;
51
52 if (level) {
53 cpu_interrupt(env, CPU_INTERRUPT_HARD);
54 } else {
55 cpu_reset_interrupt(env, CPU_INTERRUPT_HARD);
56 }
57 }
58
59 static void main_cpu_reset(void *opaque)
60 {
61 ResetInfo *reset_info = opaque;
62 CPUState *env = reset_info->env;
63
64 cpu_reset(env);
65
66 /* init defaults */
67 env->pc = reset_info->bootstrap_pc;
68 env->regs[R_R1] = reset_info->cmdline_base;
69 env->regs[R_R2] = reset_info->initrd_base;
70 env->regs[R_R3] = reset_info->initrd_base + reset_info->initrd_size;
71 env->eba = reset_info->flash_base;
72 env->deba = reset_info->flash_base;
73 }
74
75 static void
76 milkymist_init(ram_addr_t ram_size_not_used,
77 const char *boot_device,
78 const char *kernel_filename,
79 const char *kernel_cmdline,
80 const char *initrd_filename, const char *cpu_model)
81 {
82 CPUState *env;
83 int kernel_size;
84 DriveInfo *dinfo;
85 MemoryRegion *address_space_mem = get_system_memory();
86 MemoryRegion *phys_sdram = g_new(MemoryRegion, 1);
87 qemu_irq irq[32], *cpu_irq;
88 int i;
89 char *bios_filename;
90 ResetInfo *reset_info;
91
92 /* memory map */
93 target_phys_addr_t flash_base = 0x00000000;
94 size_t flash_sector_size = 128 * 1024;
95 size_t flash_size = 32 * 1024 * 1024;
96 target_phys_addr_t sdram_base = 0x40000000;
97 size_t sdram_size = 128 * 1024 * 1024;
98
99 target_phys_addr_t initrd_base = sdram_base + 0x1002000;
100 target_phys_addr_t cmdline_base = sdram_base + 0x1000000;
101 size_t initrd_max = sdram_size - 0x1002000;
102
103 reset_info = g_malloc0(sizeof(ResetInfo));
104
105 if (cpu_model == NULL) {
106 cpu_model = "lm32-full";
107 }
108 env = cpu_init(cpu_model);
109 reset_info->env = env;
110
111 cpu_lm32_set_phys_msb_ignore(env, 1);
112
113 memory_region_init_ram(phys_sdram, "milkymist.sdram", sdram_size);
114 vmstate_register_ram_global(phys_sdram);
115 memory_region_add_subregion(address_space_mem, sdram_base, phys_sdram);
116
117 dinfo = drive_get(IF_PFLASH, 0, 0);
118 /* Numonyx JS28F256J3F105 */
119 pflash_cfi01_register(flash_base, NULL, "milkymist.flash", flash_size,
120 dinfo ? dinfo->bdrv : NULL, flash_sector_size,
121 flash_size / flash_sector_size, 2,
122 0x00, 0x89, 0x00, 0x1d, 1);
123
124 /* create irq lines */
125 cpu_irq = qemu_allocate_irqs(cpu_irq_handler, env, 1);
126 env->pic_state = lm32_pic_init(*cpu_irq);
127 for (i = 0; i < 32; i++) {
128 irq[i] = qdev_get_gpio_in(env->pic_state, i);
129 }
130
131 /* load bios rom */
132 if (bios_name == NULL) {
133 bios_name = BIOS_FILENAME;
134 }
135 bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
136
137 if (bios_filename) {
138 load_image_targphys(bios_filename, BIOS_OFFSET, BIOS_SIZE);
139 }
140
141 reset_info->bootstrap_pc = BIOS_OFFSET;
142
143 /* if no kernel is given no valid bios rom is a fatal error */
144 if (!kernel_filename && !dinfo && !bios_filename) {
145 fprintf(stderr, "qemu: could not load Milkymist One bios '%s'\n",
146 bios_name);
147 exit(1);
148 }
149
150 milkymist_uart_create(0x60000000, irq[0]);
151 milkymist_sysctl_create(0x60001000, irq[1], irq[2], irq[3],
152 80000000, 0x10014d31, 0x0000041f, 0x00000001);
153 milkymist_hpdmc_create(0x60002000);
154 milkymist_vgafb_create(0x60003000, 0x40000000, 0x0fffffff);
155 milkymist_memcard_create(0x60004000);
156 milkymist_ac97_create(0x60005000, irq[4], irq[5], irq[6], irq[7]);
157 milkymist_pfpu_create(0x60006000, irq[8]);
158 milkymist_tmu2_create(0x60007000, irq[9]);
159 milkymist_minimac2_create(0x60008000, 0x30000000, irq[10], irq[11]);
160 milkymist_softusb_create(0x6000f000, irq[15],
161 0x20000000, 0x1000, 0x20020000, 0x2000);
162
163 /* make sure juart isn't the first chardev */
164 env->juart_state = lm32_juart_init();
165
166 if (kernel_filename) {
167 uint64_t entry;
168
169 /* Boots a kernel elf binary. */
170 kernel_size = load_elf(kernel_filename, NULL, NULL, &entry, NULL, NULL,
171 1, ELF_MACHINE, 0);
172 reset_info->bootstrap_pc = entry;
173
174 if (kernel_size < 0) {
175 kernel_size = load_image_targphys(kernel_filename, sdram_base,
176 sdram_size);
177 reset_info->bootstrap_pc = sdram_base;
178 }
179
180 if (kernel_size < 0) {
181 fprintf(stderr, "qemu: could not load kernel '%s'\n",
182 kernel_filename);
183 exit(1);
184 }
185 }
186
187 if (kernel_cmdline && strlen(kernel_cmdline)) {
188 pstrcpy_targphys("cmdline", cmdline_base, TARGET_PAGE_SIZE,
189 kernel_cmdline);
190 reset_info->cmdline_base = (uint32_t)cmdline_base;
191 }
192
193 if (initrd_filename) {
194 size_t initrd_size;
195 initrd_size = load_image_targphys(initrd_filename, initrd_base,
196 initrd_max);
197 reset_info->initrd_base = (uint32_t)initrd_base;
198 reset_info->initrd_size = (uint32_t)initrd_size;
199 }
200
201 qemu_register_reset(main_cpu_reset, reset_info);
202 }
203
204 static QEMUMachine milkymist_machine = {
205 .name = "milkymist",
206 .desc = "Milkymist One",
207 .init = milkymist_init,
208 .is_default = 0
209 };
210
211 static void milkymist_machine_init(void)
212 {
213 qemu_register_machine(&milkymist_machine);
214 }
215
216 machine_init(milkymist_machine_init);