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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 #include "exec-memory.h"
42
43 #include "microblaze_pic_cpu.h"
44 #include "xilinx_axidma.h"
45
46 #define LMB_BRAM_SIZE  (128 * 1024)
47 #define FLASH_SIZE     (32 * 1024 * 1024)
48
49 static struct
50 {
51     uint32_t bootstrap_pc;
52     uint32_t cmdline;
53     uint32_t fdt;
54 } boot_info;
55
56 static void main_cpu_reset(void *opaque)
57 {
58     CPUState *env = opaque;
59
60     cpu_reset(env);
61     env->regs[5] = boot_info.cmdline;
62     env->regs[7] = boot_info.fdt;
63     env->sregs[SR_PC] = boot_info.bootstrap_pc;
64     env->pvr.regs[10] = 0x0e000000; /* virtex 6 */
65     /* setup pvr to match kernel setting */
66     env->pvr.regs[5] |= PVR5_DCACHE_WRITEBACK_MASK;
67     env->pvr.regs[0] |= PVR0_USE_FPU_MASK | PVR0_ENDI;
68     env->pvr.regs[0] = (env->pvr.regs[0] & ~PVR0_VERSION_MASK) | (0x14 << 8);
69     env->pvr.regs[2] ^= PVR2_USE_FPU2_MASK;
70     env->pvr.regs[4] = 0xc56b8000;
71     env->pvr.regs[5] = 0xc56be000;
72 }
73
74 #define BINARY_DEVICE_TREE_FILE "petalogix-ml605.dtb"
75 static int petalogix_load_device_tree(target_phys_addr_t addr,
76                                       uint32_t ramsize,
77                                       target_phys_addr_t initrd_base,
78                                       target_phys_addr_t initrd_size,
79                                       const char *kernel_cmdline)
80 {
81     char *path;
82     int fdt_size;
83 #ifdef CONFIG_FDT
84     void *fdt;
85     int r;
86
87     /* Try the local "mb.dtb" override.  */
88     fdt = load_device_tree("mb.dtb", &fdt_size);
89     if (!fdt) {
90         path = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
91         if (path) {
92             fdt = load_device_tree(path, &fdt_size);
93             g_free(path);
94         }
95         if (!fdt) {
96             return 0;
97         }
98     }
99
100     r = qemu_devtree_setprop_string(fdt, "/chosen", "bootargs", kernel_cmdline);
101     if (r < 0) {
102         fprintf(stderr, "couldn't set /chosen/bootargs\n");
103     }
104     cpu_physical_memory_write(addr, (void *)fdt, fdt_size);
105 #else
106     /* We lack libfdt so we cannot manipulate the fdt. Just pass on the blob
107        to the kernel.  */
108     fdt_size = load_image_targphys("mb.dtb", addr, 0x10000);
109     if (fdt_size < 0) {
110         path = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
111         if (path) {
112             fdt_size = load_image_targphys(path, addr, 0x10000);
113             g_free(path);
114         }
115     }
116
117     if (kernel_cmdline) {
118         fprintf(stderr,
119                 "Warning: missing libfdt, cannot pass cmdline to kernel!\n");
120     }
121 #endif
122     return fdt_size;
123 }
124
125 static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
126 {
127     return addr - 0x30000000LL;
128 }
129
130 #define MEMORY_BASEADDR 0x50000000
131 #define FLASH_BASEADDR 0x86000000
132 #define INTC_BASEADDR 0x81800000
133 #define TIMER_BASEADDR 0x83c00000
134 #define UART16550_BASEADDR 0x83e00000
135 #define AXIENET_BASEADDR 0x82780000
136 #define AXIDMA_BASEADDR 0x84600000
137
138 static void
139 petalogix_ml605_init(ram_addr_t ram_size,
140                           const char *boot_device,
141                           const char *kernel_filename,
142                           const char *kernel_cmdline,
143                           const char *initrd_filename, const char *cpu_model)
144 {
145     MemoryRegion *address_space_mem = get_system_memory();
146     DeviceState *dev;
147     CPUState *env;
148     int kernel_size;
149     DriveInfo *dinfo;
150     int i;
151     target_phys_addr_t ddr_base = MEMORY_BASEADDR;
152     MemoryRegion *phys_lmb_bram = g_new(MemoryRegion, 1);
153     MemoryRegion *phys_ram = g_new(MemoryRegion, 1);
154     qemu_irq irq[32], *cpu_irq;
155
156     /* init CPUs */
157     if (cpu_model == NULL) {
158         cpu_model = "microblaze";
159     }
160     env = cpu_init(cpu_model);
161
162     qemu_register_reset(main_cpu_reset, env);
163
164     /* Attach emulated BRAM through the LMB.  */
165     memory_region_init_ram(phys_lmb_bram, NULL, "petalogix_ml605.lmb_bram",
166                            LMB_BRAM_SIZE);
167     memory_region_add_subregion(address_space_mem, 0x00000000, phys_lmb_bram);
168
169     memory_region_init_ram(phys_ram, NULL, "petalogix_ml605.ram", ram_size);
170     memory_region_add_subregion(address_space_mem, ddr_base, phys_ram);
171
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,
176                           NULL, "petalogix_ml605.flash", FLASH_SIZE,
177                           dinfo ? dinfo->bdrv : NULL, (64 * 1024),
178                           FLASH_SIZE >> 16,
179                           2, 0x89, 0x18, 0x0000, 0x0, 0);
180
181
182     cpu_irq = microblaze_pic_init_cpu(env);
183     dev = xilinx_intc_create(INTC_BASEADDR, cpu_irq[0], 4);
184     for (i = 0; i < 32; i++) {
185         irq[i] = qdev_get_gpio_in(dev, i);
186     }
187
188     serial_mm_init(address_space_mem, UART16550_BASEADDR + 0x1000, 2,
189                    irq[5], 115200, serial_hds[0], DEVICE_LITTLE_ENDIAN);
190
191     /* 2 timers at irq 2 @ 100 Mhz.  */
192     xilinx_timer_create(TIMER_BASEADDR, irq[2], 2, 100 * 1000000);
193
194     /* axi ethernet and dma initialization. TODO: Dynamically connect them.  */
195     {
196         static struct XilinxDMAConnection dmach;
197
198         xilinx_axiethernet_create(&dmach, &nd_table[0], 0x82780000,
199                                   irq[3], 0x1000, 0x1000);
200         xilinx_axiethernetdma_create(&dmach, 0x84600000,
201                                      irq[1], irq[0], 100 * 1000000);
202     }
203
204     if (kernel_filename) {
205         uint64_t entry, low, high;
206         uint32_t base32;
207         int big_endian = 0;
208
209 #ifdef TARGET_WORDS_BIGENDIAN
210         big_endian = 1;
211 #endif
212
213         /* Boots a kernel elf binary.  */
214         kernel_size = load_elf(kernel_filename, NULL, NULL,
215                                &entry, &low, &high,
216                                big_endian, ELF_MACHINE, 0);
217         base32 = entry;
218         if (base32 == 0xc0000000) {
219             kernel_size = load_elf(kernel_filename, translate_kernel_address,
220                                    NULL, &entry, NULL, NULL,
221                                    big_endian, ELF_MACHINE, 0);
222         }
223         /* Always boot into physical ram.  */
224         boot_info.bootstrap_pc = ddr_base + (entry & 0x0fffffff);
225
226         /* If it wasn't an ELF image, try an u-boot image.  */
227         if (kernel_size < 0) {
228             target_phys_addr_t uentry, loadaddr;
229
230             kernel_size = load_uimage(kernel_filename, &uentry, &loadaddr, 0);
231             boot_info.bootstrap_pc = uentry;
232             high = (loadaddr + kernel_size + 3) & ~3;
233         }
234
235         /* Not an ELF image nor an u-boot image, try a RAW image.  */
236         if (kernel_size < 0) {
237             kernel_size = load_image_targphys(kernel_filename, ddr_base,
238                                               ram_size);
239             boot_info.bootstrap_pc = ddr_base;
240             high = (ddr_base + kernel_size + 3) & ~3;
241         }
242
243         boot_info.cmdline = high + 4096;
244         if (kernel_cmdline && strlen(kernel_cmdline)) {
245             pstrcpy_targphys("cmdline", boot_info.cmdline, 256, kernel_cmdline);
246         }
247         /* Provide a device-tree.  */
248         boot_info.fdt = boot_info.cmdline + 4096;
249         petalogix_load_device_tree(boot_info.fdt, ram_size,
250                                    0, 0,
251                                    kernel_cmdline);
252     }
253 }
254
255 static QEMUMachine petalogix_ml605_machine = {
256     .name = "petalogix-ml605",
257     .desc = "PetaLogix linux refdesign for xilinx ml605 little endian",
258     .init = petalogix_ml605_init,
259     .is_default = 0
260 };
261
262 static void petalogix_ml605_machine_init(void)
263 {
264     qemu_register_machine(&petalogix_ml605_machine);
265 }
266
267 machine_init(petalogix_ml605_machine_init);
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