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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"
1.1.1.2 ! root 32: #include "exec-memory.h"
1.1 root 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;
1.1.1.2 ! root 85: MemoryRegion *address_space_mem = get_system_memory();
! 86: MemoryRegion *phys_sdram = g_new(MemoryRegion, 1);
1.1 root 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:
1.1.1.2 ! root 103: reset_info = g_malloc0(sizeof(ResetInfo));
1.1 root 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:
1.1.1.2 ! root 113: memory_region_init_ram(phys_sdram, NULL, "milkymist.sdram", sdram_size);
! 114: memory_region_add_subregion(address_space_mem, sdram_base, phys_sdram);
1.1 root 115:
116: dinfo = drive_get(IF_PFLASH, 0, 0);
117: /* Numonyx JS28F256J3F105 */
1.1.1.2 ! root 118: pflash_cfi01_register(flash_base, NULL, "milkymist.flash", flash_size,
1.1 root 119: dinfo ? dinfo->bdrv : NULL, flash_sector_size,
120: flash_size / flash_sector_size, 2,
121: 0x00, 0x89, 0x00, 0x1d, 1);
122:
123: /* create irq lines */
124: cpu_irq = qemu_allocate_irqs(cpu_irq_handler, env, 1);
125: env->pic_state = lm32_pic_init(*cpu_irq);
126: for (i = 0; i < 32; i++) {
127: irq[i] = qdev_get_gpio_in(env->pic_state, i);
128: }
129:
130: /* load bios rom */
131: if (bios_name == NULL) {
132: bios_name = BIOS_FILENAME;
133: }
134: bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
135:
136: if (bios_filename) {
137: load_image_targphys(bios_filename, BIOS_OFFSET, BIOS_SIZE);
138: }
139:
140: reset_info->bootstrap_pc = BIOS_OFFSET;
141:
142: /* if no kernel is given no valid bios rom is a fatal error */
143: if (!kernel_filename && !dinfo && !bios_filename) {
144: fprintf(stderr, "qemu: could not load Milkymist One bios '%s'\n",
145: bios_name);
146: exit(1);
147: }
148:
1.1.1.2 ! root 149: milkymist_uart_create(0x60000000, irq[0]);
! 150: milkymist_sysctl_create(0x60001000, irq[1], irq[2], irq[3],
1.1 root 151: 80000000, 0x10014d31, 0x0000041f, 0x00000001);
152: milkymist_hpdmc_create(0x60002000);
153: milkymist_vgafb_create(0x60003000, 0x40000000, 0x0fffffff);
154: milkymist_memcard_create(0x60004000);
1.1.1.2 ! root 155: milkymist_ac97_create(0x60005000, irq[4], irq[5], irq[6], irq[7]);
! 156: milkymist_pfpu_create(0x60006000, irq[8]);
! 157: milkymist_tmu2_create(0x60007000, irq[9]);
! 158: milkymist_minimac2_create(0x60008000, 0x30000000, irq[10], irq[11]);
! 159: milkymist_softusb_create(0x6000f000, irq[15],
1.1 root 160: 0x20000000, 0x1000, 0x20020000, 0x2000);
161:
162: /* make sure juart isn't the first chardev */
163: env->juart_state = lm32_juart_init();
164:
165: if (kernel_filename) {
166: uint64_t entry;
167:
168: /* Boots a kernel elf binary. */
169: kernel_size = load_elf(kernel_filename, NULL, NULL, &entry, NULL, NULL,
170: 1, ELF_MACHINE, 0);
171: reset_info->bootstrap_pc = entry;
172:
173: if (kernel_size < 0) {
174: kernel_size = load_image_targphys(kernel_filename, sdram_base,
175: sdram_size);
176: reset_info->bootstrap_pc = sdram_base;
177: }
178:
179: if (kernel_size < 0) {
180: fprintf(stderr, "qemu: could not load kernel '%s'\n",
181: kernel_filename);
182: exit(1);
183: }
184: }
185:
186: if (kernel_cmdline && strlen(kernel_cmdline)) {
187: pstrcpy_targphys("cmdline", cmdline_base, TARGET_PAGE_SIZE,
188: kernel_cmdline);
189: reset_info->cmdline_base = (uint32_t)cmdline_base;
190: }
191:
192: if (initrd_filename) {
193: size_t initrd_size;
194: initrd_size = load_image_targphys(initrd_filename, initrd_base,
195: initrd_max);
196: reset_info->initrd_base = (uint32_t)initrd_base;
197: reset_info->initrd_size = (uint32_t)initrd_size;
198: }
199:
200: qemu_register_reset(main_cpu_reset, reset_info);
201: }
202:
203: static QEMUMachine milkymist_machine = {
204: .name = "milkymist",
205: .desc = "Milkymist One",
206: .init = milkymist_init,
207: .is_default = 0
208: };
209:
210: static void milkymist_machine_init(void)
211: {
212: qemu_register_machine(&milkymist_machine);
213: }
214:
215: machine_init(milkymist_machine_init);
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