1 | /* |
2 | * QEMU HPPA hardware system emulator. |
3 | * Copyright 2018 Helge Deller <deller@gmx.de> |
4 | */ |
5 | |
6 | #include "qemu/osdep.h" |
7 | #include "qemu-common.h" |
8 | #include "cpu.h" |
9 | #include "elf.h" |
10 | #include "hw/loader.h" |
11 | #include "hw/boards.h" |
12 | #include "qemu/error-report.h" |
13 | #include "sysemu/reset.h" |
14 | #include "sysemu/sysemu.h" |
15 | #include "hw/timer/mc146818rtc.h" |
16 | #include "hw/ide.h" |
17 | #include "hw/timer/i8254.h" |
18 | #include "hw/char/serial.h" |
19 | #include "hppa_sys.h" |
20 | #include "qemu/units.h" |
21 | #include "qapi/error.h" |
22 | #include "qemu/log.h" |
23 | |
24 | #define MAX_IDE_BUS 2 |
25 | |
26 | static ISABus *hppa_isa_bus(void) |
27 | { |
28 | ISABus *isa_bus; |
29 | qemu_irq *isa_irqs; |
30 | MemoryRegion *isa_region; |
31 | |
32 | isa_region = g_new(MemoryRegion, 1); |
33 | memory_region_init_io(isa_region, NULL, &hppa_pci_ignore_ops, |
34 | NULL, "isa-io" , 0x800); |
35 | memory_region_add_subregion(get_system_memory(), IDE_HPA, |
36 | isa_region); |
37 | |
38 | isa_bus = isa_bus_new(NULL, get_system_memory(), isa_region, |
39 | &error_abort); |
40 | isa_irqs = i8259_init(isa_bus, |
41 | /* qemu_allocate_irq(dino_set_isa_irq, s, 0)); */ |
42 | NULL); |
43 | isa_bus_irqs(isa_bus, isa_irqs); |
44 | |
45 | return isa_bus; |
46 | } |
47 | |
48 | static uint64_t cpu_hppa_to_phys(void *opaque, uint64_t addr) |
49 | { |
50 | addr &= (0x10000000 - 1); |
51 | return addr; |
52 | } |
53 | |
54 | static HPPACPU *cpu[HPPA_MAX_CPUS]; |
55 | static uint64_t firmware_entry; |
56 | |
57 | static void machine_hppa_init(MachineState *machine) |
58 | { |
59 | const char *kernel_filename = machine->kernel_filename; |
60 | const char *kernel_cmdline = machine->kernel_cmdline; |
61 | const char *initrd_filename = machine->initrd_filename; |
62 | DeviceState *dev; |
63 | PCIBus *pci_bus; |
64 | ISABus *isa_bus; |
65 | qemu_irq rtc_irq, serial_irq; |
66 | char *firmware_filename; |
67 | uint64_t firmware_low, firmware_high; |
68 | long size; |
69 | uint64_t kernel_entry = 0, kernel_low, kernel_high; |
70 | MemoryRegion *addr_space = get_system_memory(); |
71 | MemoryRegion *rom_region; |
72 | MemoryRegion *ram_region; |
73 | MemoryRegion *cpu_region; |
74 | long i; |
75 | unsigned int smp_cpus = machine->smp.cpus; |
76 | |
77 | ram_size = machine->ram_size; |
78 | |
79 | /* Create CPUs. */ |
80 | for (i = 0; i < smp_cpus; i++) { |
81 | cpu[i] = HPPA_CPU(cpu_create(machine->cpu_type)); |
82 | |
83 | cpu_region = g_new(MemoryRegion, 1); |
84 | memory_region_init_io(cpu_region, OBJECT(cpu[i]), &hppa_io_eir_ops, |
85 | cpu[i], g_strdup_printf("cpu%ld-io-eir" , i), 4); |
86 | memory_region_add_subregion(addr_space, CPU_HPA + i * 0x1000, |
87 | cpu_region); |
88 | } |
89 | |
90 | /* Limit main memory. */ |
91 | if (ram_size > FIRMWARE_START) { |
92 | machine->ram_size = ram_size = FIRMWARE_START; |
93 | } |
94 | |
95 | /* Main memory region. */ |
96 | ram_region = g_new(MemoryRegion, 1); |
97 | memory_region_allocate_system_memory(ram_region, OBJECT(machine), |
98 | "ram" , ram_size); |
99 | memory_region_add_subregion(addr_space, 0, ram_region); |
100 | |
101 | /* Init Dino (PCI host bus chip). */ |
102 | pci_bus = dino_init(addr_space, &rtc_irq, &serial_irq); |
103 | assert(pci_bus); |
104 | |
105 | /* Create ISA bus. */ |
106 | isa_bus = hppa_isa_bus(); |
107 | assert(isa_bus); |
108 | |
109 | /* Realtime clock, used by firmware for PDC_TOD call. */ |
110 | mc146818_rtc_init(isa_bus, 2000, rtc_irq); |
111 | |
112 | /* Serial code setup. */ |
113 | if (serial_hd(0)) { |
114 | uint32_t addr = DINO_UART_HPA + 0x800; |
115 | serial_mm_init(addr_space, addr, 0, serial_irq, |
116 | 115200, serial_hd(0), DEVICE_BIG_ENDIAN); |
117 | } |
118 | |
119 | /* SCSI disk setup. */ |
120 | dev = DEVICE(pci_create_simple(pci_bus, -1, "lsi53c895a" )); |
121 | lsi53c8xx_handle_legacy_cmdline(dev); |
122 | |
123 | /* Network setup. e1000 is good enough, failing Tulip support. */ |
124 | for (i = 0; i < nb_nics; i++) { |
125 | pci_nic_init_nofail(&nd_table[i], pci_bus, "e1000" , NULL); |
126 | } |
127 | |
128 | /* Load firmware. Given that this is not "real" firmware, |
129 | but one explicitly written for the emulation, we might as |
130 | well load it directly from an ELF image. */ |
131 | firmware_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, |
132 | bios_name ? bios_name : |
133 | "hppa-firmware.img" ); |
134 | if (firmware_filename == NULL) { |
135 | error_report("no firmware provided" ); |
136 | exit(1); |
137 | } |
138 | |
139 | size = load_elf(firmware_filename, NULL, NULL, NULL, |
140 | &firmware_entry, &firmware_low, &firmware_high, |
141 | true, EM_PARISC, 0, 0); |
142 | |
143 | /* Unfortunately, load_elf sign-extends reading elf32. */ |
144 | firmware_entry = (target_ureg)firmware_entry; |
145 | firmware_low = (target_ureg)firmware_low; |
146 | firmware_high = (target_ureg)firmware_high; |
147 | |
148 | if (size < 0) { |
149 | error_report("could not load firmware '%s'" , firmware_filename); |
150 | exit(1); |
151 | } |
152 | qemu_log_mask(CPU_LOG_PAGE, "Firmware loaded at 0x%08" PRIx64 |
153 | "-0x%08" PRIx64 ", entry at 0x%08" PRIx64 ".\n" , |
154 | firmware_low, firmware_high, firmware_entry); |
155 | if (firmware_low < ram_size || firmware_high >= FIRMWARE_END) { |
156 | error_report("Firmware overlaps with memory or IO space" ); |
157 | exit(1); |
158 | } |
159 | g_free(firmware_filename); |
160 | |
161 | rom_region = g_new(MemoryRegion, 1); |
162 | memory_region_allocate_system_memory(rom_region, OBJECT(machine), |
163 | "firmware" , |
164 | (FIRMWARE_END - FIRMWARE_START)); |
165 | memory_region_add_subregion(addr_space, FIRMWARE_START, rom_region); |
166 | |
167 | /* Load kernel */ |
168 | if (kernel_filename) { |
169 | size = load_elf(kernel_filename, NULL, &cpu_hppa_to_phys, |
170 | NULL, &kernel_entry, &kernel_low, &kernel_high, |
171 | true, EM_PARISC, 0, 0); |
172 | |
173 | /* Unfortunately, load_elf sign-extends reading elf32. */ |
174 | kernel_entry = (target_ureg) cpu_hppa_to_phys(NULL, kernel_entry); |
175 | kernel_low = (target_ureg)kernel_low; |
176 | kernel_high = (target_ureg)kernel_high; |
177 | |
178 | if (size < 0) { |
179 | error_report("could not load kernel '%s'" , kernel_filename); |
180 | exit(1); |
181 | } |
182 | qemu_log_mask(CPU_LOG_PAGE, "Kernel loaded at 0x%08" PRIx64 |
183 | "-0x%08" PRIx64 ", entry at 0x%08" PRIx64 |
184 | ", size %" PRIu64 " kB\n" , |
185 | kernel_low, kernel_high, kernel_entry, size / KiB); |
186 | |
187 | if (kernel_cmdline) { |
188 | cpu[0]->env.gr[24] = 0x4000; |
189 | pstrcpy_targphys("cmdline" , cpu[0]->env.gr[24], |
190 | TARGET_PAGE_SIZE, kernel_cmdline); |
191 | } |
192 | |
193 | if (initrd_filename) { |
194 | ram_addr_t initrd_base; |
195 | int64_t initrd_size; |
196 | |
197 | initrd_size = get_image_size(initrd_filename); |
198 | if (initrd_size < 0) { |
199 | error_report("could not load initial ram disk '%s'" , |
200 | initrd_filename); |
201 | exit(1); |
202 | } |
203 | |
204 | /* Load the initrd image high in memory. |
205 | Mirror the algorithm used by palo: |
206 | (1) Due to sign-extension problems and PDC, |
207 | put the initrd no higher than 1G. |
208 | (2) Reserve 64k for stack. */ |
209 | initrd_base = MIN(ram_size, 1 * GiB); |
210 | initrd_base = initrd_base - 64 * KiB; |
211 | initrd_base = (initrd_base - initrd_size) & TARGET_PAGE_MASK; |
212 | |
213 | if (initrd_base < kernel_high) { |
214 | error_report("kernel and initial ram disk too large!" ); |
215 | exit(1); |
216 | } |
217 | |
218 | load_image_targphys(initrd_filename, initrd_base, initrd_size); |
219 | cpu[0]->env.gr[23] = initrd_base; |
220 | cpu[0]->env.gr[22] = initrd_base + initrd_size; |
221 | } |
222 | } |
223 | |
224 | if (!kernel_entry) { |
225 | /* When booting via firmware, tell firmware if we want interactive |
226 | * mode (kernel_entry=1), and to boot from CD (gr[24]='d') |
227 | * or hard disc * (gr[24]='c'). |
228 | */ |
229 | kernel_entry = boot_menu ? 1 : 0; |
230 | cpu[0]->env.gr[24] = machine->boot_order[0]; |
231 | } |
232 | |
233 | /* We jump to the firmware entry routine and pass the |
234 | * various parameters in registers. After firmware initialization, |
235 | * firmware will start the Linux kernel with ramdisk and cmdline. |
236 | */ |
237 | cpu[0]->env.gr[26] = ram_size; |
238 | cpu[0]->env.gr[25] = kernel_entry; |
239 | |
240 | /* tell firmware how many SMP CPUs to present in inventory table */ |
241 | cpu[0]->env.gr[21] = smp_cpus; |
242 | } |
243 | |
244 | static void hppa_machine_reset(MachineState *ms) |
245 | { |
246 | unsigned int smp_cpus = ms->smp.cpus; |
247 | int i; |
248 | |
249 | qemu_devices_reset(); |
250 | |
251 | /* Start all CPUs at the firmware entry point. |
252 | * Monarch CPU will initialize firmware, secondary CPUs |
253 | * will enter a small idle look and wait for rendevouz. */ |
254 | for (i = 0; i < smp_cpus; i++) { |
255 | cpu_set_pc(CPU(cpu[i]), firmware_entry); |
256 | cpu[i]->env.gr[5] = CPU_HPA + i * 0x1000; |
257 | } |
258 | |
259 | /* already initialized by machine_hppa_init()? */ |
260 | if (cpu[0]->env.gr[26] == ram_size) { |
261 | return; |
262 | } |
263 | |
264 | cpu[0]->env.gr[26] = ram_size; |
265 | cpu[0]->env.gr[25] = 0; /* no firmware boot menu */ |
266 | cpu[0]->env.gr[24] = 'c'; |
267 | /* gr22/gr23 unused, no initrd while reboot. */ |
268 | cpu[0]->env.gr[21] = smp_cpus; |
269 | } |
270 | |
271 | |
272 | static void machine_hppa_machine_init(MachineClass *mc) |
273 | { |
274 | mc->desc = "HPPA generic machine" ; |
275 | mc->default_cpu_type = TYPE_HPPA_CPU; |
276 | mc->init = machine_hppa_init; |
277 | mc->reset = hppa_machine_reset; |
278 | mc->block_default_type = IF_SCSI; |
279 | mc->max_cpus = HPPA_MAX_CPUS; |
280 | mc->default_cpus = 1; |
281 | mc->is_default = 1; |
282 | mc->default_ram_size = 512 * MiB; |
283 | mc->default_boot_order = "cd" ; |
284 | } |
285 | |
286 | DEFINE_MACHINE("hppa" , machine_hppa_machine_init) |
287 | |