summaryrefslogtreecommitdiffstats
path: root/hw/ppc440_bamboo.c
blob: b734e3a56c636e635ca6dd724fd45a6edcd6ecba (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
/*
 * Qemu PowerPC 440 Bamboo board emulation
 *
 * Copyright 2007 IBM Corporation.
 * Authors:
 * 	Jerone Young <jyoung5@us.ibm.com>
 * 	Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
 * 	Hollis Blanchard <hollisb@us.ibm.com>
 *
 * This work is licensed under the GNU GPL license version 2 or later.
 *
 */

#include "config.h"
#include "qemu-common.h"
#include "net.h"
#include "hw.h"
#include "pci.h"
#include "boards.h"
#include "ppc440.h"
#include "kvm.h"
#include "kvm_ppc.h"
#include "device_tree.h"
#include "loader.h"
#include "elf.h"
#include "exec-memory.h"

#define BINARY_DEVICE_TREE_FILE "bamboo.dtb"

/* from u-boot */
#define KERNEL_ADDR  0x1000000
#define FDT_ADDR     0x1800000
#define RAMDISK_ADDR 0x1900000

static int bamboo_load_device_tree(target_phys_addr_t addr,
                                     uint32_t ramsize,
                                     target_phys_addr_t initrd_base,
                                     target_phys_addr_t initrd_size,
                                     const char *kernel_cmdline)
{
    int ret = -1;
#ifdef CONFIG_FDT
    uint32_t mem_reg_property[] = { 0, 0, ramsize };
    char *filename;
    int fdt_size;
    void *fdt;
    uint32_t tb_freq = 400000000;
    uint32_t clock_freq = 400000000;

    filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
    if (!filename) {
        goto out;
    }
    fdt = load_device_tree(filename, &fdt_size);
    g_free(filename);
    if (fdt == NULL) {
        goto out;
    }

    /* Manipulate device tree in memory. */

    ret = qemu_devtree_setprop(fdt, "/memory", "reg", mem_reg_property,
                               sizeof(mem_reg_property));
    if (ret < 0)
        fprintf(stderr, "couldn't set /memory/reg\n");

    ret = qemu_devtree_setprop_cell(fdt, "/chosen", "linux,initrd-start",
                                    initrd_base);
    if (ret < 0)
        fprintf(stderr, "couldn't set /chosen/linux,initrd-start\n");

    ret = qemu_devtree_setprop_cell(fdt, "/chosen", "linux,initrd-end",
                                    (initrd_base + initrd_size));
    if (ret < 0)
        fprintf(stderr, "couldn't set /chosen/linux,initrd-end\n");

    ret = qemu_devtree_setprop_string(fdt, "/chosen", "bootargs",
                                      kernel_cmdline);
    if (ret < 0)
        fprintf(stderr, "couldn't set /chosen/bootargs\n");

    /* Copy data from the host device tree into the guest. Since the guest can
     * directly access the timebase without host involvement, we must expose
     * the correct frequencies. */
    if (kvm_enabled()) {
        tb_freq = kvmppc_get_tbfreq();
        clock_freq = kvmppc_get_clockfreq();
    }

    qemu_devtree_setprop_cell(fdt, "/cpus/cpu@0", "clock-frequency",
                              clock_freq);
    qemu_devtree_setprop_cell(fdt, "/cpus/cpu@0", "timebase-frequency",
                              tb_freq);

    ret = rom_add_blob_fixed(BINARY_DEVICE_TREE_FILE, fdt, fdt_size, addr);
    g_free(fdt);

out:
#endif

    return ret;
}

static void bamboo_init(ram_addr_t ram_size,
                        const char *boot_device,
                        const char *kernel_filename,
                        const char *kernel_cmdline,
                        const char *initrd_filename,
                        const char *cpu_model)
{
    unsigned int pci_irq_nrs[4] = { 28, 27, 26, 25 };
    MemoryRegion *address_space_mem = get_system_memory();
    PCIBus *pcibus;
    CPUState *env;
    uint64_t elf_entry;
    uint64_t elf_lowaddr;
    target_phys_addr_t entry = 0;
    target_phys_addr_t loadaddr = 0;
    target_long initrd_size = 0;
    int success;
    int i;

    /* Setup CPU. */
    env = ppc440ep_init(address_space_mem, &ram_size, &pcibus,
                        pci_irq_nrs, 1, cpu_model);

    if (pcibus) {
        /* Register network interfaces. */
        for (i = 0; i < nb_nics; i++) {
            /* There are no PCI NICs on the Bamboo board, but there are
             * PCI slots, so we can pick whatever default model we want. */
            pci_nic_init_nofail(&nd_table[i], "e1000", NULL);
        }
    }

    /* Load kernel. */
    if (kernel_filename) {
        success = load_uimage(kernel_filename, &entry, &loadaddr, NULL);
        if (success < 0) {
            success = load_elf(kernel_filename, NULL, NULL, &elf_entry,
                               &elf_lowaddr, NULL, 1, ELF_MACHINE, 0);
            entry = elf_entry;
            loadaddr = elf_lowaddr;
        }
        /* XXX try again as binary */
        if (success < 0) {
            fprintf(stderr, "qemu: could not load kernel '%s'\n",
                    kernel_filename);
            exit(1);
        }
    }

    /* Load initrd. */
    if (initrd_filename) {
        initrd_size = load_image_targphys(initrd_filename, RAMDISK_ADDR,
                                          ram_size - RAMDISK_ADDR);

        if (initrd_size < 0) {
            fprintf(stderr, "qemu: could not load ram disk '%s' at %x\n",
                    initrd_filename, RAMDISK_ADDR);
            exit(1);
        }
    }

    /* If we're loading a kernel directly, we must load the device tree too. */
    if (kernel_filename) {
        if (bamboo_load_device_tree(FDT_ADDR, ram_size, RAMDISK_ADDR,
                                    initrd_size, kernel_cmdline) < 0) {
            fprintf(stderr, "couldn't load device tree\n");
            exit(1);
        }

        /* Set initial guest state. */
        env->gpr[1] = (16<<20) - 8;
        env->gpr[3] = FDT_ADDR;
        env->nip = entry;
        /* XXX we currently depend on KVM to create some initial TLB entries. */
    }

    if (kvm_enabled())
        kvmppc_init();
}

static QEMUMachine bamboo_machine = {
    .name = "bamboo-0.13",
    .alias = "bamboo",
    .desc = "bamboo",
    .init = bamboo_init,
};

static QEMUMachine bamboo_machine_v0_12 = {
    .name = "bamboo-0.12",
    .desc = "bamboo",
    .init = bamboo_init,
    .compat_props = (GlobalProperty[]) {
        {
            .driver   = "virtio-serial-pci",
            .property = "max_ports",
            .value    = stringify(1),
        },{
            .driver   = "virtio-serial-pci",
            .property = "vectors",
            .value    = stringify(0),
        },
        { /* end of list */ }
    },
};

static void bamboo_machine_init(void)
{
    qemu_register_machine(&bamboo_machine);
    qemu_register_machine(&bamboo_machine_v0_12);
}

machine_init(bamboo_machine_init);
OpenPOWER on IntegriCloud