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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 #include "exec-memory.h"
39
40 #include "microblaze_pic_cpu.h"
41
42 #define LMB_BRAM_SIZE  (128 * 1024)
43 #define FLASH_SIZE     (16 * 1024 * 1024)
44
45 static struct
46 {
47     uint32_t bootstrap_pc;
48     uint32_t cmdline;
49     uint32_t fdt;
50 } boot_info;
51
52 static void main_cpu_reset(void *opaque)
53 {
54     CPUState *env = opaque;
55
56     cpu_reset(env);
57     env->regs[5] = boot_info.cmdline;
58     env->regs[7] = boot_info.fdt;
59     env->sregs[SR_PC] = boot_info.bootstrap_pc;
60 }
61
62 #define BINARY_DEVICE_TREE_FILE "petalogix-s3adsp1800.dtb"
63 static int petalogix_load_device_tree(target_phys_addr_t addr,
64                                       uint32_t ramsize,
65                                       target_phys_addr_t initrd_base,
66                                       target_phys_addr_t initrd_size,
67                                       const char *kernel_cmdline)
68 {
69     char *path;
70     int fdt_size;
71 #ifdef CONFIG_FDT
72     void *fdt;
73     int r;
74
75     /* Try the local "mb.dtb" override.  */
76     fdt = load_device_tree("mb.dtb", &fdt_size);
77     if (!fdt) {
78         path = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
79         if (path) {
80             fdt = load_device_tree(path, &fdt_size);
81             g_free(path);
82         }
83         if (!fdt)
84             return 0;
85     }
86
87     r = qemu_devtree_setprop_string(fdt, "/chosen", "bootargs", kernel_cmdline);
88     if (r < 0)
89         fprintf(stderr, "couldn't set /chosen/bootargs\n");
90     cpu_physical_memory_write (addr, (void *)fdt, fdt_size);
91 #else
92     /* We lack libfdt so we cannot manipulate the fdt. Just pass on the blob
93        to the kernel.  */
94     fdt_size = load_image_targphys("mb.dtb", addr, 0x10000);
95     if (fdt_size < 0) {
96         path = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
97         if (path) {
98             fdt_size = load_image_targphys(path, addr, 0x10000);
99             g_free(path);
100         }
101     }
102
103     if (kernel_cmdline) {
104         fprintf(stderr,
105                 "Warning: missing libfdt, cannot pass cmdline to kernel!\n");
106     }
107 #endif
108     return fdt_size;
109 }
110
111 static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
112 {
113     return addr - 0x30000000LL;
114 }
115
116 static void
117 petalogix_s3adsp1800_init(ram_addr_t ram_size,
118                           const char *boot_device,
119                           const char *kernel_filename,
120                           const char *kernel_cmdline,
121                           const char *initrd_filename, const char *cpu_model)
122 {
123     DeviceState *dev;
124     CPUState *env;
125     int kernel_size;
126     DriveInfo *dinfo;
127     int i;
128     target_phys_addr_t ddr_base = 0x90000000;
129     MemoryRegion *phys_lmb_bram = g_new(MemoryRegion, 1);
130     MemoryRegion *phys_ram = g_new(MemoryRegion, 1);
131     qemu_irq irq[32], *cpu_irq;
132     MemoryRegion *sysmem = get_system_memory();
133
134     /* init CPUs */
135     if (cpu_model == NULL) {
136         cpu_model = "microblaze";
137     }
138     env = cpu_init(cpu_model);
139
140     env->pvr.regs[10] = 0x0c000000; /* spartan 3a dsp family.  */
141     qemu_register_reset(main_cpu_reset, env);
142
143     /* Attach emulated BRAM through the LMB.  */
144     memory_region_init_ram(phys_lmb_bram,
145                            "petalogix_s3adsp1800.lmb_bram", LMB_BRAM_SIZE);
146     vmstate_register_ram_global(phys_lmb_bram);
147     memory_region_add_subregion(sysmem, 0x00000000, phys_lmb_bram);
148
149     memory_region_init_ram(phys_ram, "petalogix_s3adsp1800.ram", ram_size);
150     vmstate_register_ram_global(phys_ram);
151     memory_region_add_subregion(sysmem, ddr_base, phys_ram);
152
153     dinfo = drive_get(IF_PFLASH, 0, 0);
154     pflash_cfi01_register(0xa0000000,
155                           NULL, "petalogix_s3adsp1800.flash", FLASH_SIZE,
156                           dinfo ? dinfo->bdrv : NULL, (64 * 1024),
157                           FLASH_SIZE >> 16,
158                           1, 0x89, 0x18, 0x0000, 0x0, 1);
159
160     cpu_irq = microblaze_pic_init_cpu(env);
161     dev = xilinx_intc_create(0x81800000, cpu_irq[0], 2);
162     for (i = 0; i < 32; i++) {
163         irq[i] = qdev_get_gpio_in(dev, i);
164     }
165
166     sysbus_create_simple("xilinx,uartlite", 0x84000000, irq[3]);
167     /* 2 timers at irq 2 @ 62 Mhz.  */
168     xilinx_timer_create(0x83c00000, irq[0], 2, 62 * 1000000);
169     xilinx_ethlite_create(&nd_table[0], 0x81000000, irq[1], 0, 0);
170
171     if (kernel_filename) {
172         uint64_t entry, low, high;
173         uint32_t base32;
174         int big_endian = 0;
175
176 #ifdef TARGET_WORDS_BIGENDIAN
177         big_endian = 1;
178 #endif
179
180         /* Boots a kernel elf binary.  */
181         kernel_size = load_elf(kernel_filename, NULL, NULL,
182                                &entry, &low, &high,
183                                big_endian, ELF_MACHINE, 0);
184         base32 = entry;
185         if (base32 == 0xc0000000) {
186             kernel_size = load_elf(kernel_filename, translate_kernel_address,
187                                    NULL, &entry, NULL, NULL,
188                                    big_endian, ELF_MACHINE, 0);
189         }
190         /* Always boot into physical ram.  */
191         boot_info.bootstrap_pc = ddr_base + (entry & 0x0fffffff);
192
193         /* If it wasn't an ELF image, try an u-boot image.  */
194         if (kernel_size < 0) {
195             target_phys_addr_t uentry, loadaddr;
196
197             kernel_size = load_uimage(kernel_filename, &uentry, &loadaddr, 0);
198             boot_info.bootstrap_pc = uentry;
199             high = (loadaddr + kernel_size + 3) & ~3;
200         }
201
202         /* Not an ELF image nor an u-boot image, try a RAW image.  */
203         if (kernel_size < 0) {
204             kernel_size = load_image_targphys(kernel_filename, ddr_base,
205                                               ram_size);
206             boot_info.bootstrap_pc = ddr_base;
207             high = (ddr_base + kernel_size + 3) & ~3;
208         }
209
210         boot_info.cmdline = high + 4096;
211         if (kernel_cmdline && strlen(kernel_cmdline)) {
212             pstrcpy_targphys("cmdline", boot_info.cmdline, 256, kernel_cmdline);
213         }
214         /* Provide a device-tree.  */
215         boot_info.fdt = boot_info.cmdline + 4096; 
216         petalogix_load_device_tree(boot_info.fdt, ram_size,
217                                    0, 0,
218                                    kernel_cmdline);
219     }
220 }
221
222 static QEMUMachine petalogix_s3adsp1800_machine = {
223     .name = "petalogix-s3adsp1800",
224     .desc = "PetaLogix linux refdesign for xilinx Spartan 3ADSP1800",
225     .init = petalogix_s3adsp1800_init,
226     .is_default = 1
227 };
228
229 static void petalogix_s3adsp1800_machine_init(void)
230 {
231     qemu_register_machine(&petalogix_s3adsp1800_machine);
232 }
233
234 machine_init(petalogix_s3adsp1800_machine_init);
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