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1 /*
2  * Model of Petalogix linux reference design targeting Xilinx Spartan 3ADSP-1800
3  * boards.
4  *
5  * Copyright (c) 2009 Edgar E. Iglesias.
6  *
7  * Permission is hereby granted, free of charge, to any person obtaining a copy
8  * of this software and associated documentation files (the "Software"), to deal
9  * in the Software without restriction, including without limitation the rights
10  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11  * copies of the Software, and to permit persons to whom the Software is
12  * furnished to do so, subject to the following conditions:
13  *
14  * The above copyright notice and this permission notice shall be included in
15  * all copies or substantial portions of the Software.
16  *
17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
23  * THE SOFTWARE.
24  */
25
26 #include "sysbus.h"
27 #include "hw.h"
28 #include "net.h"
29 #include "flash.h"
30 #include "sysemu.h"
31 #include "devices.h"
32 #include "boards.h"
33 #include "device_tree.h"
34 #include "xilinx.h"
35 #include "loader.h"
36 #include "elf.h"
37 #include "blockdev.h"
38
39 #define LMB_BRAM_SIZE  (128 * 1024)
40 #define FLASH_SIZE     (16 * 1024 * 1024)
41
42 static struct
43 {
44     uint32_t bootstrap_pc;
45     uint32_t cmdline;
46     uint32_t fdt;
47 } boot_info;
48
49 static void main_cpu_reset(void *opaque)
50 {
51     CPUState *env = opaque;
52
53     cpu_reset(env);
54     env->regs[5] = boot_info.cmdline;
55     env->regs[7] = boot_info.fdt;
56     env->sregs[SR_PC] = boot_info.bootstrap_pc;
57 }
58
59 #define BINARY_DEVICE_TREE_FILE "petalogix-s3adsp1800.dtb"
60 static int petalogix_load_device_tree(target_phys_addr_t addr,
61                                       uint32_t ramsize,
62                                       target_phys_addr_t initrd_base,
63                                       target_phys_addr_t initrd_size,
64                                       const char *kernel_cmdline)
65 {
66     char *path;
67     int fdt_size;
68 #ifdef CONFIG_FDT
69     void *fdt;
70     int r;
71
72     /* Try the local "mb.dtb" override.  */
73     fdt = load_device_tree("mb.dtb", &fdt_size);
74     if (!fdt) {
75         path = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
76         if (path) {
77             fdt = load_device_tree(path, &fdt_size);
78             qemu_free(path);
79         }
80         if (!fdt)
81             return 0;
82     }
83
84     r = qemu_devtree_setprop_string(fdt, "/chosen", "bootargs", kernel_cmdline);
85     if (r < 0)
86         fprintf(stderr, "couldn't set /chosen/bootargs\n");
87     cpu_physical_memory_write (addr, (void *)fdt, fdt_size);
88 #else
89     /* We lack libfdt so we cannot manipulate the fdt. Just pass on the blob
90        to the kernel.  */
91     fdt_size = load_image_targphys("mb.dtb", addr, 0x10000);
92     if (fdt_size < 0) {
93         path = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
94         if (path) {
95             fdt_size = load_image_targphys(path, addr, 0x10000);
96             qemu_free(path);
97         }
98     }
99
100     if (kernel_cmdline) {
101         fprintf(stderr,
102                 "Warning: missing libfdt, cannot pass cmdline to kernel!\n");
103     }
104 #endif
105     return fdt_size;
106 }
107
108 static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
109 {
110     return addr - 0x30000000LL;
111 }
112
113 static void
114 petalogix_s3adsp1800_init(ram_addr_t ram_size,
115                           const char *boot_device,
116                           const char *kernel_filename,
117                           const char *kernel_cmdline,
118                           const char *initrd_filename, const char *cpu_model)
119 {
120     DeviceState *dev;
121     CPUState *env;
122     int kernel_size;
123     DriveInfo *dinfo;
124     int i;
125     target_phys_addr_t ddr_base = 0x90000000;
126     ram_addr_t phys_lmb_bram;
127     ram_addr_t phys_ram;
128     ram_addr_t phys_flash;
129     qemu_irq irq[32], *cpu_irq;
130
131     /* init CPUs */
132     if (cpu_model == NULL) {
133         cpu_model = "microblaze";
134     }
135     env = cpu_init(cpu_model);
136
137     env->pvr.regs[10] = 0x0c000000; /* spartan 3a dsp family.  */
138     qemu_register_reset(main_cpu_reset, env);
139
140     /* Attach emulated BRAM through the LMB.  */
141     phys_lmb_bram = qemu_ram_alloc(NULL, "petalogix_s3adsp1800.lmb_bram",
142                                    LMB_BRAM_SIZE);
143     cpu_register_physical_memory(0x00000000, LMB_BRAM_SIZE,
144                                  phys_lmb_bram | IO_MEM_RAM);
145
146     phys_ram = qemu_ram_alloc(NULL, "petalogix_s3adsp1800.ram", ram_size);
147     cpu_register_physical_memory(ddr_base, ram_size, phys_ram | IO_MEM_RAM);
148
149     phys_flash = qemu_ram_alloc(NULL, "petalogix_s3adsp1800.flash", FLASH_SIZE);
150     dinfo = drive_get(IF_PFLASH, 0, 0);
151     pflash_cfi01_register(0xa0000000, phys_flash,
152                           dinfo ? dinfo->bdrv : NULL, (64 * 1024),
153                           FLASH_SIZE >> 16,
154                           1, 0x89, 0x18, 0x0000, 0x0, 1);
155
156     cpu_irq = microblaze_pic_init_cpu(env);
157     dev = xilinx_intc_create(0x81800000, cpu_irq[0], 2);
158     for (i = 0; i < 32; i++) {
159         irq[i] = qdev_get_gpio_in(dev, i);
160     }
161
162     sysbus_create_simple("xilinx,uartlite", 0x84000000, irq[3]);
163     /* 2 timers at irq 2 @ 62 Mhz.  */
164     xilinx_timer_create(0x83c00000, irq[0], 2, 62 * 1000000);
165     xilinx_ethlite_create(&nd_table[0], 0x81000000, irq[1], 0, 0);
166
167     if (kernel_filename) {
168         uint64_t entry, low, high;
169         uint32_t base32;
170         int big_endian = 0;
171
172 #ifdef TARGET_WORDS_BIGENDIAN
173         big_endian = 1;
174 #endif
175
176         /* Boots a kernel elf binary.  */
177         kernel_size = load_elf(kernel_filename, NULL, NULL,
178                                &entry, &low, &high,
179                                big_endian, ELF_MACHINE, 0);
180         base32 = entry;
181         if (base32 == 0xc0000000) {
182             kernel_size = load_elf(kernel_filename, translate_kernel_address,
183                                    NULL, &entry, NULL, NULL,
184                                    big_endian, ELF_MACHINE, 0);
185         }
186         /* Always boot into physical ram.  */
187         boot_info.bootstrap_pc = ddr_base + (entry & 0x0fffffff);
188
189         /* If it wasn't an ELF image, try an u-boot image.  */
190         if (kernel_size < 0) {
191             target_phys_addr_t uentry, loadaddr;
192
193             kernel_size = load_uimage(kernel_filename, &uentry, &loadaddr, 0);
194             boot_info.bootstrap_pc = uentry;
195             high = (loadaddr + kernel_size + 3) & ~3;
196         }
197
198         /* Not an ELF image nor an u-boot image, try a RAW image.  */
199         if (kernel_size < 0) {
200             kernel_size = load_image_targphys(kernel_filename, ddr_base,
201                                               ram_size);
202             boot_info.bootstrap_pc = ddr_base;
203             high = (ddr_base + kernel_size + 3) & ~3;
204         }
205
206         boot_info.cmdline = high + 4096;
207         if (kernel_cmdline && strlen(kernel_cmdline)) {
208             pstrcpy_targphys("cmdline", boot_info.cmdline, 256, kernel_cmdline);
209         }
210         /* Provide a device-tree.  */
211         boot_info.fdt = boot_info.cmdline + 4096; 
212         petalogix_load_device_tree(boot_info.fdt, ram_size,
213                                    0, 0,
214                                    kernel_cmdline);
215     }
216 }
217
218 static QEMUMachine petalogix_s3adsp1800_machine = {
219     .name = "petalogix-s3adsp1800",
220     .desc = "PetaLogix linux refdesign for xilinx Spartan 3ADSP1800",
221     .init = petalogix_s3adsp1800_init,
222     .is_default = 1
223 };
224
225 static void petalogix_s3adsp1800_machine_init(void)
226 {
227     qemu_register_machine(&petalogix_s3adsp1800_machine);
228 }
229
230 machine_init(petalogix_s3adsp1800_machine_init);
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