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 "hw/sysbus.h"
27 #include "hw/hw.h"
28 #include "net/net.h"
29 #include "hw/block/flash.h"
30 #include "sysemu/sysemu.h"
31 #include "hw/devices.h"
32 #include "hw/boards.h"
33 #include "hw/xilinx.h"
34 #include "sysemu/blockdev.h"
35 #include "exec/address-spaces.h"
36 
37 #include "boot.h"
38 
39 #define LMB_BRAM_SIZE  (128 * 1024)
40 #define FLASH_SIZE     (16 * 1024 * 1024)
41 
42 #define BINARY_DEVICE_TREE_FILE "petalogix-s3adsp1800.dtb"
43 
44 #define MEMORY_BASEADDR 0x90000000
45 #define FLASH_BASEADDR 0xa0000000
46 #define INTC_BASEADDR 0x81800000
47 #define TIMER_BASEADDR 0x83c00000
48 #define UARTLITE_BASEADDR 0x84000000
49 #define ETHLITE_BASEADDR 0x81000000
50 
51 static void machine_cpu_reset(MicroBlazeCPU *cpu)
52 {
53     CPUMBState *env = &cpu->env;
54 
55     env->pvr.regs[10] = 0x0c000000; /* spartan 3a dsp family.  */
56 }
57 
58 static void
59 petalogix_s3adsp1800_init(QEMUMachineInitArgs *args)
60 {
61     ram_addr_t ram_size = args->ram_size;
62     const char *cpu_model = args->cpu_model;
63     DeviceState *dev;
64     MicroBlazeCPU *cpu;
65     DriveInfo *dinfo;
66     int i;
67     hwaddr ddr_base = MEMORY_BASEADDR;
68     MemoryRegion *phys_lmb_bram = g_new(MemoryRegion, 1);
69     MemoryRegion *phys_ram = g_new(MemoryRegion, 1);
70     qemu_irq irq[32];
71     MemoryRegion *sysmem = get_system_memory();
72 
73     /* init CPUs */
74     if (cpu_model == NULL) {
75         cpu_model = "microblaze";
76     }
77     cpu = cpu_mb_init(cpu_model);
78 
79     /* Attach emulated BRAM through the LMB.  */
80     memory_region_init_ram(phys_lmb_bram, NULL,
81                            "petalogix_s3adsp1800.lmb_bram", LMB_BRAM_SIZE);
82     vmstate_register_ram_global(phys_lmb_bram);
83     memory_region_add_subregion(sysmem, 0x00000000, phys_lmb_bram);
84 
85     memory_region_init_ram(phys_ram, NULL, "petalogix_s3adsp1800.ram", ram_size);
86     vmstate_register_ram_global(phys_ram);
87     memory_region_add_subregion(sysmem, ddr_base, phys_ram);
88 
89     dinfo = drive_get(IF_PFLASH, 0, 0);
90     pflash_cfi01_register(FLASH_BASEADDR,
91                           NULL, "petalogix_s3adsp1800.flash", FLASH_SIZE,
92                           dinfo ? dinfo->bdrv : NULL, (64 * 1024),
93                           FLASH_SIZE >> 16,
94                           1, 0x89, 0x18, 0x0000, 0x0, 1);
95 
96     dev = xilinx_intc_create(INTC_BASEADDR, qdev_get_gpio_in(DEVICE(cpu),
97                              MB_CPU_IRQ), 0xA);
98     for (i = 0; i < 32; i++) {
99         irq[i] = qdev_get_gpio_in(dev, i);
100     }
101 
102     sysbus_create_simple("xlnx.xps-uartlite", UARTLITE_BASEADDR, irq[3]);
103     /* 2 timers at irq 2 @ 62 Mhz.  */
104     xilinx_timer_create(TIMER_BASEADDR, irq[0], 0, 62 * 1000000);
105     xilinx_ethlite_create(&nd_table[0], ETHLITE_BASEADDR, irq[1], 0, 0);
106 
107     microblaze_load_kernel(cpu, ddr_base, ram_size,
108                            args->initrd_filename,
109                            BINARY_DEVICE_TREE_FILE,
110                            machine_cpu_reset);
111 }
112 
113 static QEMUMachine petalogix_s3adsp1800_machine = {
114     .name = "petalogix-s3adsp1800",
115     .desc = "PetaLogix linux refdesign for xilinx Spartan 3ADSP1800",
116     .init = petalogix_s3adsp1800_init,
117     .is_default = 1,
118 };
119 
120 static void petalogix_s3adsp1800_machine_init(void)
121 {
122     qemu_register_machine(&petalogix_s3adsp1800_machine);
123 }
124 
125 machine_init(petalogix_s3adsp1800_machine_init);
126