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1 /*
2  * Model of Petalogix linux reference design targeting Xilinx Spartan ml605
3  * board.
4  *
5  * Copyright (c) 2011 Michal Simek <[email protected]>
6  * Copyright (c) 2011 PetaLogix
7  * Copyright (c) 2009 Edgar E. Iglesias.
8  *
9  * Permission is hereby granted, free of charge, to any person obtaining a copy
10  * of this software and associated documentation files (the "Software"), to deal
11  * in the Software without restriction, including without limitation the rights
12  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
13  * copies of the Software, and to permit persons to whom the Software is
14  * furnished to do so, subject to the following conditions:
15  *
16  * The above copyright notice and this permission notice shall be included in
17  * all copies or substantial portions of the Software.
18  *
19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
22  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
23  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
24  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
25  * THE SOFTWARE.
26  */
27
28 #include "sysbus.h"
29 #include "hw.h"
30 #include "net.h"
31 #include "flash.h"
32 #include "sysemu.h"
33 #include "devices.h"
34 #include "boards.h"
35 #include "device_tree.h"
36 #include "xilinx.h"
37 #include "loader.h"
38 #include "elf.h"
39 #include "blockdev.h"
40 #include "pc.h"
41
42 #include "xilinx_axidma.h"
43
44 #define LMB_BRAM_SIZE  (128 * 1024)
45 #define FLASH_SIZE     (32 * 1024 * 1024)
46
47 static struct
48 {
49     uint32_t bootstrap_pc;
50     uint32_t cmdline;
51     uint32_t fdt;
52 } boot_info;
53
54 static void main_cpu_reset(void *opaque)
55 {
56     CPUState *env = opaque;
57
58     cpu_reset(env);
59     env->regs[5] = boot_info.cmdline;
60     env->regs[7] = boot_info.fdt;
61     env->sregs[SR_PC] = boot_info.bootstrap_pc;
62     env->pvr.regs[10] = 0x0e000000; /* virtex 6 */
63     /* setup pvr to match kernel setting */
64     env->pvr.regs[5] |= PVR5_DCACHE_WRITEBACK_MASK;
65     env->pvr.regs[0] |= PVR0_USE_FPU_MASK | PVR0_ENDI;
66     env->pvr.regs[0] = (env->pvr.regs[0] & ~PVR0_VERSION_MASK) | (0x14 << 8);
67     env->pvr.regs[2] ^= PVR2_USE_FPU2_MASK;
68     env->pvr.regs[4] = 0xc56b8000;
69     env->pvr.regs[5] = 0xc56be000;
70 }
71
72 #define BINARY_DEVICE_TREE_FILE "petalogix-ml605.dtb"
73 static int petalogix_load_device_tree(target_phys_addr_t addr,
74                                       uint32_t ramsize,
75                                       target_phys_addr_t initrd_base,
76                                       target_phys_addr_t initrd_size,
77                                       const char *kernel_cmdline)
78 {
79     char *path;
80     int fdt_size;
81 #ifdef CONFIG_FDT
82     void *fdt;
83     int r;
84
85     /* Try the local "mb.dtb" override.  */
86     fdt = load_device_tree("mb.dtb", &fdt_size);
87     if (!fdt) {
88         path = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
89         if (path) {
90             fdt = load_device_tree(path, &fdt_size);
91             qemu_free(path);
92         }
93         if (!fdt) {
94             return 0;
95         }
96     }
97
98     r = qemu_devtree_setprop_string(fdt, "/chosen", "bootargs", kernel_cmdline);
99     if (r < 0) {
100         fprintf(stderr, "couldn't set /chosen/bootargs\n");
101     }
102     cpu_physical_memory_write(addr, (void *)fdt, fdt_size);
103 #else
104     /* We lack libfdt so we cannot manipulate the fdt. Just pass on the blob
105        to the kernel.  */
106     fdt_size = load_image_targphys("mb.dtb", addr, 0x10000);
107     if (fdt_size < 0) {
108         path = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
109         if (path) {
110             fdt_size = load_image_targphys(path, addr, 0x10000);
111             qemu_free(path);
112         }
113     }
114
115     if (kernel_cmdline) {
116         fprintf(stderr,
117                 "Warning: missing libfdt, cannot pass cmdline to kernel!\n");
118     }
119 #endif
120     return fdt_size;
121 }
122
123 static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
124 {
125     return addr - 0x30000000LL;
126 }
127
128 #define MEMORY_BASEADDR 0x50000000
129 #define FLASH_BASEADDR 0x86000000
130 #define INTC_BASEADDR 0x81800000
131 #define TIMER_BASEADDR 0x83c00000
132 #define UART16550_BASEADDR 0x83e00000
133 #define AXIENET_BASEADDR 0x82780000
134 #define AXIDMA_BASEADDR 0x84600000
135
136 static void
137 petalogix_ml605_init(ram_addr_t ram_size,
138                           const char *boot_device,
139                           const char *kernel_filename,
140                           const char *kernel_cmdline,
141                           const char *initrd_filename, const char *cpu_model)
142 {
143     DeviceState *dev;
144     CPUState *env;
145     int kernel_size;
146     DriveInfo *dinfo;
147     int i;
148     target_phys_addr_t ddr_base = MEMORY_BASEADDR;
149     ram_addr_t phys_lmb_bram;
150     ram_addr_t phys_ram;
151     ram_addr_t phys_flash;
152     qemu_irq irq[32], *cpu_irq;
153
154     /* init CPUs */
155     if (cpu_model == NULL) {
156         cpu_model = "microblaze";
157     }
158     env = cpu_init(cpu_model);
159
160     qemu_register_reset(main_cpu_reset, env);
161
162     /* Attach emulated BRAM through the LMB.  */
163     phys_lmb_bram = qemu_ram_alloc(NULL, "petalogix_ml605.lmb_bram",
164                                    LMB_BRAM_SIZE);
165     cpu_register_physical_memory(0x00000000, LMB_BRAM_SIZE,
166                                  phys_lmb_bram | IO_MEM_RAM);
167
168     phys_ram = qemu_ram_alloc(NULL, "petalogix_ml605.ram", ram_size);
169     cpu_register_physical_memory(ddr_base, ram_size, phys_ram | IO_MEM_RAM);
170
171     phys_flash = qemu_ram_alloc(NULL, "petalogix_ml605.flash", FLASH_SIZE);
172     dinfo = drive_get(IF_PFLASH, 0, 0);
173     /* 5th parameter 2 means bank-width
174      * 10th paremeter 0 means little-endian */
175     pflash_cfi01_register(FLASH_BASEADDR, phys_flash,
176                           dinfo ? dinfo->bdrv : NULL, (64 * 1024),
177                           FLASH_SIZE >> 16,
178                           2, 0x89, 0x18, 0x0000, 0x0, 0);
179
180
181     cpu_irq = microblaze_pic_init_cpu(env);
182     dev = xilinx_intc_create(INTC_BASEADDR, cpu_irq[0], 4);
183     for (i = 0; i < 32; i++) {
184         irq[i] = qdev_get_gpio_in(dev, i);
185     }
186
187     serial_mm_init(UART16550_BASEADDR + 0x1000, 2, irq[5], 115200,
188                    serial_hds[0], 1, 0);
189
190     /* 2 timers at irq 2 @ 100 Mhz.  */
191     xilinx_timer_create(TIMER_BASEADDR, irq[2], 2, 100 * 1000000);
192
193     /* axi ethernet and dma initialization. TODO: Dynamically connect them.  */
194     {
195         static struct XilinxDMAConnection dmach;
196
197         xilinx_axiethernet_create(&dmach, &nd_table[0], 0x82780000,
198                                   irq[3], 0x1000, 0x1000);
199         xilinx_axiethernetdma_create(&dmach, 0x84600000,
200                                      irq[1], irq[0], 100 * 1000000);
201     }
202
203     if (kernel_filename) {
204         uint64_t entry, low, high;
205         uint32_t base32;
206         int big_endian = 0;
207
208 #ifdef TARGET_WORDS_BIGENDIAN
209         big_endian = 1;
210 #endif
211
212         /* Boots a kernel elf binary.  */
213         kernel_size = load_elf(kernel_filename, NULL, NULL,
214                                &entry, &low, &high,
215                                big_endian, ELF_MACHINE, 0);
216         base32 = entry;
217         if (base32 == 0xc0000000) {
218             kernel_size = load_elf(kernel_filename, translate_kernel_address,
219                                    NULL, &entry, NULL, NULL,
220                                    big_endian, ELF_MACHINE, 0);
221         }
222         /* Always boot into physical ram.  */
223         boot_info.bootstrap_pc = ddr_base + (entry & 0x0fffffff);
224
225         /* If it wasn't an ELF image, try an u-boot image.  */
226         if (kernel_size < 0) {
227             target_phys_addr_t uentry, loadaddr;
228
229             kernel_size = load_uimage(kernel_filename, &uentry, &loadaddr, 0);
230             boot_info.bootstrap_pc = uentry;
231             high = (loadaddr + kernel_size + 3) & ~3;
232         }
233
234         /* Not an ELF image nor an u-boot image, try a RAW image.  */
235         if (kernel_size < 0) {
236             kernel_size = load_image_targphys(kernel_filename, ddr_base,
237                                               ram_size);
238             boot_info.bootstrap_pc = ddr_base;
239             high = (ddr_base + kernel_size + 3) & ~3;
240         }
241
242         boot_info.cmdline = high + 4096;
243         if (kernel_cmdline && strlen(kernel_cmdline)) {
244             pstrcpy_targphys("cmdline", boot_info.cmdline, 256, kernel_cmdline);
245         }
246         /* Provide a device-tree.  */
247         boot_info.fdt = boot_info.cmdline + 4096;
248         petalogix_load_device_tree(boot_info.fdt, ram_size,
249                                    0, 0,
250                                    kernel_cmdline);
251     }
252 }
253
254 static QEMUMachine petalogix_ml605_machine = {
255     .name = "petalogix-ml605",
256     .desc = "PetaLogix linux refdesign for xilinx ml605 little endian",
257     .init = petalogix_ml605_init,
258     .is_default = 0
259 };
260
261 static void petalogix_ml605_machine_init(void)
262 {
263     qemu_register_machine(&petalogix_ml605_machine);
264 }
265
266 machine_init(petalogix_ml605_machine_init);
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