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1.1 root 1: /*
2: * QEMU model for the Milkymist board.
3: *
4: * Copyright (c) 2010 Michael Walle <[email protected]>
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:
33: #define BIOS_FILENAME "mmone-bios.bin"
34: #define BIOS_OFFSET 0x00860000
35: #define BIOS_SIZE (512*1024)
36: #define KERNEL_LOAD_ADDR 0x40000000
37:
38: typedef struct {
39: CPUState *env;
40: target_phys_addr_t bootstrap_pc;
41: target_phys_addr_t flash_base;
42: target_phys_addr_t initrd_base;
43: size_t initrd_size;
44: target_phys_addr_t cmdline_base;
45: } ResetInfo;
46:
47: static void cpu_irq_handler(void *opaque, int irq, int level)
48: {
49: CPUState *env = opaque;
50:
51: if (level) {
52: cpu_interrupt(env, CPU_INTERRUPT_HARD);
53: } else {
54: cpu_reset_interrupt(env, CPU_INTERRUPT_HARD);
55: }
56: }
57:
58: static void main_cpu_reset(void *opaque)
59: {
60: ResetInfo *reset_info = opaque;
61: CPUState *env = reset_info->env;
62:
63: cpu_reset(env);
64:
65: /* init defaults */
66: env->pc = reset_info->bootstrap_pc;
67: env->regs[R_R1] = reset_info->cmdline_base;
68: env->regs[R_R2] = reset_info->initrd_base;
69: env->regs[R_R3] = reset_info->initrd_base + reset_info->initrd_size;
70: env->eba = reset_info->flash_base;
71: env->deba = reset_info->flash_base;
72: }
73:
74: static void
75: milkymist_init(ram_addr_t ram_size_not_used,
76: const char *boot_device,
77: const char *kernel_filename,
78: const char *kernel_cmdline,
79: const char *initrd_filename, const char *cpu_model)
80: {
81: CPUState *env;
82: int kernel_size;
83: DriveInfo *dinfo;
84: ram_addr_t phys_sdram;
85: ram_addr_t phys_flash;
86: qemu_irq irq[32], *cpu_irq;
87: int i;
88: char *bios_filename;
89: ResetInfo *reset_info;
90:
91: /* memory map */
92: target_phys_addr_t flash_base = 0x00000000;
93: size_t flash_sector_size = 128 * 1024;
94: size_t flash_size = 32 * 1024 * 1024;
95: target_phys_addr_t sdram_base = 0x40000000;
96: size_t sdram_size = 128 * 1024 * 1024;
97:
98: target_phys_addr_t initrd_base = sdram_base + 0x1002000;
99: target_phys_addr_t cmdline_base = sdram_base + 0x1000000;
100: size_t initrd_max = sdram_size - 0x1002000;
101:
102: reset_info = qemu_mallocz(sizeof(ResetInfo));
103:
104: if (cpu_model == NULL) {
105: cpu_model = "lm32-full";
106: }
107: env = cpu_init(cpu_model);
108: reset_info->env = env;
109:
110: cpu_lm32_set_phys_msb_ignore(env, 1);
111:
112: phys_sdram = qemu_ram_alloc(NULL, "milkymist.sdram", sdram_size);
113: cpu_register_physical_memory(sdram_base, sdram_size,
114: phys_sdram | IO_MEM_RAM);
115:
116: phys_flash = qemu_ram_alloc(NULL, "milkymist.flash", flash_size);
117: dinfo = drive_get(IF_PFLASH, 0, 0);
118: /* Numonyx JS28F256J3F105 */
119: pflash_cfi01_register(flash_base, phys_flash,
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], irq[1]);
151: milkymist_sysctl_create(0x60001000, irq[2], irq[3], irq[4],
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[5], irq[6], irq[7], irq[8]);
157: milkymist_pfpu_create(0x60006000, irq[9]);
158: milkymist_tmu2_create(0x60007000, irq[10]);
159: milkymist_minimac2_create(0x60008000, 0x30000000, irq[11], irq[12]);
160: milkymist_softusb_create(0x6000f000, irq[17],
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);
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