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1.1 root 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 controler
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: qemu_irq rtc_irq;
54: long size, i;
55: const char *palcode_filename;
56: uint64_t palcode_entry, palcode_low, palcode_high;
57: uint64_t kernel_entry, kernel_low, kernel_high;
58:
59: /* Create up to 4 cpus. */
60: memset(cpus, 0, sizeof(cpus));
61: for (i = 0; i < smp_cpus; ++i) {
62: cpus[i] = cpu_init(cpu_model ? cpu_model : "ev67");
63: }
64:
65: cpus[0]->trap_arg0 = ram_size;
66: cpus[0]->trap_arg1 = 0;
67: cpus[0]->trap_arg2 = smp_cpus;
68:
69: /* Init the chipset. */
70: pci_bus = typhoon_init(ram_size, &rtc_irq, cpus, clipper_pci_map_irq);
71:
72: rtc_init(1980, rtc_irq);
73: pit_init(0x40, 0);
74: isa_create_simple("i8042");
75:
76: /* VGA setup. Don't bother loading the bios. */
77: alpha_pci_vga_setup(pci_bus);
78:
79: /* Serial code setup. */
80: for (i = 0; i < MAX_SERIAL_PORTS; ++i) {
81: if (serial_hds[i]) {
82: serial_isa_init(i, serial_hds[i]);
83: }
84: }
85:
86: /* Network setup. e1000 is good enough, failing Tulip support. */
87: for (i = 0; i < nb_nics; i++) {
88: pci_nic_init_nofail(&nd_table[i], "e1000", NULL);
89: }
90:
91: /* IDE disk setup. */
92: {
93: DriveInfo *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
94: ide_drive_get(hd, MAX_IDE_BUS);
95:
96: pci_cmd646_ide_init(pci_bus, hd, 0);
97: }
98:
99: /* Load PALcode. Given that this is not "real" cpu palcode,
100: but one explicitly written for the emulation, we might as
101: well load it directly from and ELF image. */
102: palcode_filename = (bios_name ? bios_name : "palcode-clipper");
103: palcode_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, palcode_filename);
104: if (palcode_filename == NULL) {
105: hw_error("no palcode provided\n");
106: exit(1);
107: }
108: size = load_elf(palcode_filename, cpu_alpha_superpage_to_phys,
109: NULL, &palcode_entry, &palcode_low, &palcode_high,
110: 0, EM_ALPHA, 0);
111: if (size < 0) {
112: hw_error("could not load palcode '%s'\n", palcode_filename);
113: exit(1);
114: }
115:
116: /* Start all cpus at the PALcode RESET entry point. */
117: for (i = 0; i < smp_cpus; ++i) {
118: cpus[i]->pal_mode = 1;
119: cpus[i]->pc = palcode_entry;
120: cpus[i]->palbr = palcode_entry;
121: }
122:
123: /* Load a kernel. */
124: if (kernel_filename) {
125: uint64_t param_offset;
126:
127: size = load_elf(kernel_filename, cpu_alpha_superpage_to_phys,
128: NULL, &kernel_entry, &kernel_low, &kernel_high,
129: 0, EM_ALPHA, 0);
130: if (size < 0) {
131: hw_error("could not load kernel '%s'\n", kernel_filename);
132: exit(1);
133: }
134:
135: cpus[0]->trap_arg1 = kernel_entry;
136:
137: param_offset = kernel_low - 0x6000;
138:
139: if (kernel_cmdline) {
140: pstrcpy_targphys("cmdline", param_offset, 0x100, kernel_cmdline);
141: }
142:
143: if (initrd_filename) {
144: long initrd_base, initrd_size;
145:
146: initrd_size = get_image_size(initrd_filename);
147: if (initrd_size < 0) {
148: hw_error("could not load initial ram disk '%s'\n",
149: initrd_filename);
150: exit(1);
151: }
152:
153: /* Put the initrd image as high in memory as possible. */
154: initrd_base = (ram_size - initrd_size) & TARGET_PAGE_MASK;
155: load_image_targphys(initrd_filename, initrd_base,
156: ram_size - initrd_base);
157:
158: stq_phys(param_offset + 0x100, initrd_base + 0xfffffc0000000000ULL);
159: stq_phys(param_offset + 0x108, initrd_size);
160: }
161: }
162: }
163:
164: static QEMUMachine clipper_machine = {
165: .name = "clipper",
166: .desc = "Alpha DP264/CLIPPER",
167: .init = clipper_init,
168: .max_cpus = 4,
169: .is_default = 1,
170: };
171:
172: static void clipper_machine_init(void)
173: {
174: qemu_register_machine(&clipper_machine);
175: }
176:
177: machine_init(clipper_machine_init);
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