linux-user: stack_base is now mandatory on all targets
[qemu.git] / hw / alpha_dp264.c
1 /*
2 * QEMU Alpha DP264/CLIPPER hardware system emulator.
3 *
4 * Choose CLIPPER IRQ mappings over, say, DP264, MONET, or WEBBRICK
5 * variants because CLIPPER doesn't have an SMC669 SuperIO controller
6 * that we need to emulate as well.
7 */
8
9 #include "hw.h"
10 #include "elf.h"
11 #include "loader.h"
12 #include "boards.h"
13 #include "alpha_sys.h"
14 #include "sysemu.h"
15 #include "mc146818rtc.h"
16 #include "ide.h"
17
18 #define MAX_IDE_BUS 2
19
20 static uint64_t cpu_alpha_superpage_to_phys(void *opaque, uint64_t addr)
21 {
22 if (((addr >> 41) & 3) == 2) {
23 addr &= 0xffffffffffull;
24 }
25 return addr;
26 }
27
28 /* Note that there are at least 3 viewpoints of IRQ numbers on Alpha systems.
29 (0) The dev_irq_n lines into the cpu, which we totally ignore,
30 (1) The DRIR lines in the typhoon chipset,
31 (2) The "vector" aka mangled interrupt number reported by SRM PALcode,
32 (3) The interrupt number assigned by the kernel.
33 The following function is concerned with (1) only. */
34
35 static int clipper_pci_map_irq(PCIDevice *d, int irq_num)
36 {
37 int slot = d->devfn >> 3;
38
39 assert(irq_num >= 0 && irq_num <= 3);
40
41 return (slot + 1) * 4 + irq_num;
42 }
43
44 static void clipper_init(ram_addr_t ram_size,
45 const char *boot_device,
46 const char *kernel_filename,
47 const char *kernel_cmdline,
48 const char *initrd_filename,
49 const char *cpu_model)
50 {
51 CPUState *cpus[4];
52 PCIBus *pci_bus;
53 ISABus *isa_bus;
54 qemu_irq rtc_irq;
55 long size, i;
56 const char *palcode_filename;
57 uint64_t palcode_entry, palcode_low, palcode_high;
58 uint64_t kernel_entry, kernel_low, kernel_high;
59
60 /* Create up to 4 cpus. */
61 memset(cpus, 0, sizeof(cpus));
62 for (i = 0; i < smp_cpus; ++i) {
63 cpus[i] = cpu_init(cpu_model ? cpu_model : "ev67");
64 }
65
66 cpus[0]->trap_arg0 = ram_size;
67 cpus[0]->trap_arg1 = 0;
68 cpus[0]->trap_arg2 = smp_cpus;
69
70 /* Init the chipset. */
71 pci_bus = typhoon_init(ram_size, &isa_bus, &rtc_irq, cpus,
72 clipper_pci_map_irq);
73
74 rtc_init(isa_bus, 1980, rtc_irq);
75 pit_init(isa_bus, 0x40, 0);
76 isa_create_simple(isa_bus, "i8042");
77
78 /* VGA setup. Don't bother loading the bios. */
79 alpha_pci_vga_setup(pci_bus);
80
81 /* Serial code setup. */
82 for (i = 0; i < MAX_SERIAL_PORTS; ++i) {
83 if (serial_hds[i]) {
84 serial_isa_init(isa_bus, i, serial_hds[i]);
85 }
86 }
87
88 /* Network setup. e1000 is good enough, failing Tulip support. */
89 for (i = 0; i < nb_nics; i++) {
90 pci_nic_init_nofail(&nd_table[i], "e1000", NULL);
91 }
92
93 /* IDE disk setup. */
94 {
95 DriveInfo *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
96 ide_drive_get(hd, MAX_IDE_BUS);
97
98 pci_cmd646_ide_init(pci_bus, hd, 0);
99 }
100
101 /* Load PALcode. Given that this is not "real" cpu palcode,
102 but one explicitly written for the emulation, we might as
103 well load it directly from and ELF image. */
104 palcode_filename = (bios_name ? bios_name : "palcode-clipper");
105 palcode_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, palcode_filename);
106 if (palcode_filename == NULL) {
107 hw_error("no palcode provided\n");
108 exit(1);
109 }
110 size = load_elf(palcode_filename, cpu_alpha_superpage_to_phys,
111 NULL, &palcode_entry, &palcode_low, &palcode_high,
112 0, EM_ALPHA, 0);
113 if (size < 0) {
114 hw_error("could not load palcode '%s'\n", palcode_filename);
115 exit(1);
116 }
117
118 /* Start all cpus at the PALcode RESET entry point. */
119 for (i = 0; i < smp_cpus; ++i) {
120 cpus[i]->pal_mode = 1;
121 cpus[i]->pc = palcode_entry;
122 cpus[i]->palbr = palcode_entry;
123 }
124
125 /* Load a kernel. */
126 if (kernel_filename) {
127 uint64_t param_offset;
128
129 size = load_elf(kernel_filename, cpu_alpha_superpage_to_phys,
130 NULL, &kernel_entry, &kernel_low, &kernel_high,
131 0, EM_ALPHA, 0);
132 if (size < 0) {
133 hw_error("could not load kernel '%s'\n", kernel_filename);
134 exit(1);
135 }
136
137 cpus[0]->trap_arg1 = kernel_entry;
138
139 param_offset = kernel_low - 0x6000;
140
141 if (kernel_cmdline) {
142 pstrcpy_targphys("cmdline", param_offset, 0x100, kernel_cmdline);
143 }
144
145 if (initrd_filename) {
146 long initrd_base, initrd_size;
147
148 initrd_size = get_image_size(initrd_filename);
149 if (initrd_size < 0) {
150 hw_error("could not load initial ram disk '%s'\n",
151 initrd_filename);
152 exit(1);
153 }
154
155 /* Put the initrd image as high in memory as possible. */
156 initrd_base = (ram_size - initrd_size) & TARGET_PAGE_MASK;
157 load_image_targphys(initrd_filename, initrd_base,
158 ram_size - initrd_base);
159
160 stq_phys(param_offset + 0x100, initrd_base + 0xfffffc0000000000ULL);
161 stq_phys(param_offset + 0x108, initrd_size);
162 }
163 }
164 }
165
166 static QEMUMachine clipper_machine = {
167 .name = "clipper",
168 .desc = "Alpha DP264/CLIPPER",
169 .init = clipper_init,
170 .max_cpus = 4,
171 .is_default = 1,
172 };
173
174 static void clipper_machine_init(void)
175 {
176 qemu_register_machine(&clipper_machine);
177 }
178
179 machine_init(clipper_machine_init);