xref: /openbmc/qemu/hw/m68k/q800.c (revision eeae5466)
1 /*
2  * QEMU Motorla 680x0 Macintosh hardware System Emulator
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a copy
5  * of this software and associated documentation files (the "Software"), to deal
6  * in the Software without restriction, including without limitation the rights
7  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8  * copies of the Software, and to permit persons to whom the Software is
9  * furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice shall be included in
12  * all copies or substantial portions of the Software.
13  *
14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
20  * THE SOFTWARE.
21  */
22 
23 #include "qemu/osdep.h"
24 #include "qemu/units.h"
25 #include "qemu-common.h"
26 #include "qemu/datadir.h"
27 #include "sysemu/sysemu.h"
28 #include "cpu.h"
29 #include "hw/boards.h"
30 #include "hw/or-irq.h"
31 #include "elf.h"
32 #include "hw/loader.h"
33 #include "ui/console.h"
34 #include "hw/char/escc.h"
35 #include "hw/sysbus.h"
36 #include "hw/scsi/esp.h"
37 #include "standard-headers/asm-m68k/bootinfo.h"
38 #include "standard-headers/asm-m68k/bootinfo-mac.h"
39 #include "bootinfo.h"
40 #include "hw/misc/mac_via.h"
41 #include "hw/input/adb.h"
42 #include "hw/nubus/mac-nubus-bridge.h"
43 #include "hw/display/macfb.h"
44 #include "hw/block/swim.h"
45 #include "net/net.h"
46 #include "qapi/error.h"
47 #include "sysemu/qtest.h"
48 #include "sysemu/runstate.h"
49 #include "sysemu/reset.h"
50 #include "migration/vmstate.h"
51 
52 #define MACROM_ADDR     0x40800000
53 #define MACROM_SIZE     0x00100000
54 
55 #define MACROM_FILENAME "MacROM.bin"
56 
57 #define IO_BASE               0x50000000
58 #define IO_SLICE              0x00040000
59 #define IO_SIZE               0x04000000
60 
61 #define VIA_BASE              (IO_BASE + 0x00000)
62 #define SONIC_PROM_BASE       (IO_BASE + 0x08000)
63 #define SONIC_BASE            (IO_BASE + 0x0a000)
64 #define SCC_BASE              (IO_BASE + 0x0c020)
65 #define ESP_BASE              (IO_BASE + 0x10000)
66 #define ESP_PDMA              (IO_BASE + 0x10100)
67 #define ASC_BASE              (IO_BASE + 0x14000)
68 #define SWIM_BASE             (IO_BASE + 0x1E000)
69 
70 #define NUBUS_SUPER_SLOT_BASE 0x60000000
71 #define NUBUS_SLOT_BASE       0xf0000000
72 
73 /*
74  * the video base, whereas it a Nubus address,
75  * is needed by the kernel to have early display and
76  * thus provided by the bootloader
77  */
78 #define VIDEO_BASE            0xf9001000
79 
80 #define MAC_CLOCK  3686418
81 
82 /*
83  * The GLUE (General Logic Unit) is an Apple custom integrated circuit chip
84  * that performs a variety of functions (RAM management, clock generation, ...).
85  * The GLUE chip receives interrupt requests from various devices,
86  * assign priority to each, and asserts one or more interrupt line to the
87  * CPU.
88  */
89 
90 #define TYPE_GLUE "q800-glue"
91 OBJECT_DECLARE_SIMPLE_TYPE(GLUEState, GLUE)
92 
93 struct GLUEState {
94     SysBusDevice parent_obj;
95     M68kCPU *cpu;
96     uint8_t ipr;
97 };
98 
99 static void GLUE_set_irq(void *opaque, int irq, int level)
100 {
101     GLUEState *s = opaque;
102     int i;
103 
104     if (level) {
105         s->ipr |= 1 << irq;
106     } else {
107         s->ipr &= ~(1 << irq);
108     }
109 
110     for (i = 7; i >= 0; i--) {
111         if ((s->ipr >> i) & 1) {
112             m68k_set_irq_level(s->cpu, i + 1, i + 25);
113             return;
114         }
115     }
116     m68k_set_irq_level(s->cpu, 0, 0);
117 }
118 
119 static void glue_reset(DeviceState *dev)
120 {
121     GLUEState *s = GLUE(dev);
122 
123     s->ipr = 0;
124 }
125 
126 static const VMStateDescription vmstate_glue = {
127     .name = "q800-glue",
128     .version_id = 0,
129     .minimum_version_id = 0,
130     .fields = (VMStateField[]) {
131         VMSTATE_UINT8(ipr, GLUEState),
132         VMSTATE_END_OF_LIST(),
133     },
134 };
135 
136 /*
137  * If the m68k CPU implemented its inbound irq lines as GPIO lines
138  * rather than via the m68k_set_irq_level() function we would not need
139  * this cpu link property and could instead provide outbound IRQ lines
140  * that the board could wire up to the CPU.
141  */
142 static Property glue_properties[] = {
143     DEFINE_PROP_LINK("cpu", GLUEState, cpu, TYPE_M68K_CPU, M68kCPU *),
144     DEFINE_PROP_END_OF_LIST(),
145 };
146 
147 static void glue_init(Object *obj)
148 {
149     DeviceState *dev = DEVICE(obj);
150 
151     qdev_init_gpio_in(dev, GLUE_set_irq, 8);
152 }
153 
154 static void glue_class_init(ObjectClass *klass, void *data)
155 {
156     DeviceClass *dc = DEVICE_CLASS(klass);
157 
158     dc->vmsd = &vmstate_glue;
159     dc->reset = glue_reset;
160     device_class_set_props(dc, glue_properties);
161 }
162 
163 static const TypeInfo glue_info = {
164     .name = TYPE_GLUE,
165     .parent = TYPE_SYS_BUS_DEVICE,
166     .instance_size = sizeof(GLUEState),
167     .instance_init = glue_init,
168     .class_init = glue_class_init,
169 };
170 
171 static void main_cpu_reset(void *opaque)
172 {
173     M68kCPU *cpu = opaque;
174     CPUState *cs = CPU(cpu);
175 
176     cpu_reset(cs);
177     cpu->env.aregs[7] = ldl_phys(cs->as, 0);
178     cpu->env.pc = ldl_phys(cs->as, 4);
179 }
180 
181 static uint8_t fake_mac_rom[] = {
182     0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
183 
184     /* offset: 0xa - mac_reset */
185 
186     /* via2[vDirB] |= VIA2B_vPower */
187     0x20, 0x7C, 0x50, 0xF0, 0x24, 0x00, /* moveal VIA2_BASE+vDirB,%a0 */
188     0x10, 0x10,                         /* moveb %a0@,%d0 */
189     0x00, 0x00, 0x00, 0x04,             /* orib #4,%d0 */
190     0x10, 0x80,                         /* moveb %d0,%a0@ */
191 
192     /* via2[vBufB] &= ~VIA2B_vPower */
193     0x20, 0x7C, 0x50, 0xF0, 0x20, 0x00, /* moveal VIA2_BASE+vBufB,%a0 */
194     0x10, 0x10,                         /* moveb %a0@,%d0 */
195     0x02, 0x00, 0xFF, 0xFB,             /* andib #-5,%d0 */
196     0x10, 0x80,                         /* moveb %d0,%a0@ */
197 
198     /* while (true) ; */
199     0x60, 0xFE                          /* bras [self] */
200 };
201 
202 static void q800_init(MachineState *machine)
203 {
204     M68kCPU *cpu = NULL;
205     int linux_boot;
206     int32_t kernel_size;
207     uint64_t elf_entry;
208     char *filename;
209     int bios_size;
210     ram_addr_t initrd_base;
211     int32_t initrd_size;
212     MemoryRegion *rom;
213     MemoryRegion *io;
214     const int io_slice_nb = (IO_SIZE / IO_SLICE) - 1;
215     int i;
216     ram_addr_t ram_size = machine->ram_size;
217     const char *kernel_filename = machine->kernel_filename;
218     const char *initrd_filename = machine->initrd_filename;
219     const char *kernel_cmdline = machine->kernel_cmdline;
220     const char *bios_name = machine->firmware ?: MACROM_FILENAME;
221     hwaddr parameters_base;
222     CPUState *cs;
223     DeviceState *dev;
224     DeviceState *via_dev;
225     DeviceState *escc_orgate;
226     SysBusESPState *sysbus_esp;
227     ESPState *esp;
228     SysBusDevice *sysbus;
229     BusState *adb_bus;
230     NubusBus *nubus;
231     DeviceState *glue;
232     DriveInfo *dinfo;
233 
234     linux_boot = (kernel_filename != NULL);
235 
236     if (ram_size > 1 * GiB) {
237         error_report("Too much memory for this machine: %" PRId64 " MiB, "
238                      "maximum 1024 MiB", ram_size / MiB);
239         exit(1);
240     }
241 
242     /* init CPUs */
243     cpu = M68K_CPU(cpu_create(machine->cpu_type));
244     qemu_register_reset(main_cpu_reset, cpu);
245 
246     /* RAM */
247     memory_region_add_subregion(get_system_memory(), 0, machine->ram);
248 
249     /*
250      * Memory from IO_BASE to IO_BASE + IO_SLICE is repeated
251      * from IO_BASE + IO_SLICE to IO_BASE + IO_SIZE
252      */
253     io = g_new(MemoryRegion, io_slice_nb);
254     for (i = 0; i < io_slice_nb; i++) {
255         char *name = g_strdup_printf("mac_m68k.io[%d]", i + 1);
256 
257         memory_region_init_alias(&io[i], NULL, name, get_system_memory(),
258                                  IO_BASE, IO_SLICE);
259         memory_region_add_subregion(get_system_memory(),
260                                     IO_BASE + (i + 1) * IO_SLICE, &io[i]);
261         g_free(name);
262     }
263 
264     /* IRQ Glue */
265     glue = qdev_new(TYPE_GLUE);
266     object_property_set_link(OBJECT(glue), "cpu", OBJECT(cpu), &error_abort);
267     sysbus_realize_and_unref(SYS_BUS_DEVICE(glue), &error_fatal);
268 
269     /* VIA */
270 
271     via_dev = qdev_new(TYPE_MAC_VIA);
272     dinfo = drive_get(IF_MTD, 0, 0);
273     if (dinfo) {
274         qdev_prop_set_drive(via_dev, "drive", blk_by_legacy_dinfo(dinfo));
275     }
276     sysbus = SYS_BUS_DEVICE(via_dev);
277     sysbus_realize_and_unref(sysbus, &error_fatal);
278     sysbus_mmio_map(sysbus, 0, VIA_BASE);
279     qdev_connect_gpio_out_named(DEVICE(sysbus), "irq", 0,
280                                 qdev_get_gpio_in(glue, 0));
281     qdev_connect_gpio_out_named(DEVICE(sysbus), "irq", 1,
282                                 qdev_get_gpio_in(glue, 1));
283 
284 
285     adb_bus = qdev_get_child_bus(via_dev, "adb.0");
286     dev = qdev_new(TYPE_ADB_KEYBOARD);
287     qdev_realize_and_unref(dev, adb_bus, &error_fatal);
288     dev = qdev_new(TYPE_ADB_MOUSE);
289     qdev_realize_and_unref(dev, adb_bus, &error_fatal);
290 
291     /* MACSONIC */
292 
293     if (nb_nics > 1) {
294         error_report("q800 can only have one ethernet interface");
295         exit(1);
296     }
297 
298     qemu_check_nic_model(&nd_table[0], "dp83932");
299 
300     /*
301      * MacSonic driver needs an Apple MAC address
302      * Valid prefix are:
303      * 00:05:02 Apple
304      * 00:80:19 Dayna Communications, Inc.
305      * 00:A0:40 Apple
306      * 08:00:07 Apple
307      * (Q800 use the last one)
308      */
309     nd_table[0].macaddr.a[0] = 0x08;
310     nd_table[0].macaddr.a[1] = 0x00;
311     nd_table[0].macaddr.a[2] = 0x07;
312 
313     dev = qdev_new("dp8393x");
314     qdev_set_nic_properties(dev, &nd_table[0]);
315     qdev_prop_set_uint8(dev, "it_shift", 2);
316     qdev_prop_set_bit(dev, "big_endian", true);
317     object_property_set_link(OBJECT(dev), "dma_mr",
318                              OBJECT(get_system_memory()), &error_abort);
319     sysbus = SYS_BUS_DEVICE(dev);
320     sysbus_realize_and_unref(sysbus, &error_fatal);
321     sysbus_mmio_map(sysbus, 0, SONIC_BASE);
322     sysbus_mmio_map(sysbus, 1, SONIC_PROM_BASE);
323     sysbus_connect_irq(sysbus, 0, qdev_get_gpio_in(glue, 2));
324 
325     /* SCC */
326 
327     dev = qdev_new(TYPE_ESCC);
328     qdev_prop_set_uint32(dev, "disabled", 0);
329     qdev_prop_set_uint32(dev, "frequency", MAC_CLOCK);
330     qdev_prop_set_uint32(dev, "it_shift", 1);
331     qdev_prop_set_bit(dev, "bit_swap", true);
332     qdev_prop_set_chr(dev, "chrA", serial_hd(0));
333     qdev_prop_set_chr(dev, "chrB", serial_hd(1));
334     qdev_prop_set_uint32(dev, "chnBtype", 0);
335     qdev_prop_set_uint32(dev, "chnAtype", 0);
336     sysbus = SYS_BUS_DEVICE(dev);
337     sysbus_realize_and_unref(sysbus, &error_fatal);
338 
339     /* Logically OR both its IRQs together */
340     escc_orgate = DEVICE(object_new(TYPE_OR_IRQ));
341     object_property_set_int(OBJECT(escc_orgate), "num-lines", 2, &error_fatal);
342     qdev_realize_and_unref(escc_orgate, NULL, &error_fatal);
343     sysbus_connect_irq(sysbus, 0, qdev_get_gpio_in(escc_orgate, 0));
344     sysbus_connect_irq(sysbus, 1, qdev_get_gpio_in(escc_orgate, 1));
345     qdev_connect_gpio_out(DEVICE(escc_orgate), 0, qdev_get_gpio_in(glue, 3));
346     sysbus_mmio_map(sysbus, 0, SCC_BASE);
347 
348     /* SCSI */
349 
350     dev = qdev_new(TYPE_SYSBUS_ESP);
351     sysbus_esp = SYSBUS_ESP(dev);
352     esp = &sysbus_esp->esp;
353     esp->dma_memory_read = NULL;
354     esp->dma_memory_write = NULL;
355     esp->dma_opaque = NULL;
356     sysbus_esp->it_shift = 4;
357     esp->dma_enabled = 1;
358 
359     sysbus = SYS_BUS_DEVICE(dev);
360     sysbus_realize_and_unref(sysbus, &error_fatal);
361     sysbus_connect_irq(sysbus, 0, qdev_get_gpio_in_named(via_dev,
362                                                          "via2-irq",
363                                                          VIA2_IRQ_SCSI_BIT));
364     sysbus_connect_irq(sysbus, 1,
365                        qdev_get_gpio_in_named(via_dev, "via2-irq",
366                                               VIA2_IRQ_SCSI_DATA_BIT));
367     sysbus_mmio_map(sysbus, 0, ESP_BASE);
368     sysbus_mmio_map(sysbus, 1, ESP_PDMA);
369 
370     scsi_bus_legacy_handle_cmdline(&esp->bus);
371 
372     /* SWIM floppy controller */
373 
374     dev = qdev_new(TYPE_SWIM);
375     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
376     sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, SWIM_BASE);
377 
378     /* NuBus */
379 
380     dev = qdev_new(TYPE_MAC_NUBUS_BRIDGE);
381     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
382     sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, NUBUS_SUPER_SLOT_BASE);
383     sysbus_mmio_map(SYS_BUS_DEVICE(dev), 1, NUBUS_SLOT_BASE);
384 
385     nubus = MAC_NUBUS_BRIDGE(dev)->bus;
386 
387     /* framebuffer in nubus slot #9 */
388 
389     dev = qdev_new(TYPE_NUBUS_MACFB);
390     qdev_prop_set_uint32(dev, "width", graphic_width);
391     qdev_prop_set_uint32(dev, "height", graphic_height);
392     qdev_prop_set_uint8(dev, "depth", graphic_depth);
393     qdev_realize_and_unref(dev, BUS(nubus), &error_fatal);
394 
395     cs = CPU(cpu);
396     if (linux_boot) {
397         uint64_t high;
398         kernel_size = load_elf(kernel_filename, NULL, NULL, NULL,
399                                &elf_entry, NULL, &high, NULL, 1,
400                                EM_68K, 0, 0);
401         if (kernel_size < 0) {
402             error_report("could not load kernel '%s'", kernel_filename);
403             exit(1);
404         }
405         stl_phys(cs->as, 4, elf_entry); /* reset initial PC */
406         parameters_base = (high + 1) & ~1;
407 
408         BOOTINFO1(cs->as, parameters_base, BI_MACHTYPE, MACH_MAC);
409         BOOTINFO1(cs->as, parameters_base, BI_FPUTYPE, FPU_68040);
410         BOOTINFO1(cs->as, parameters_base, BI_MMUTYPE, MMU_68040);
411         BOOTINFO1(cs->as, parameters_base, BI_CPUTYPE, CPU_68040);
412         BOOTINFO1(cs->as, parameters_base, BI_MAC_CPUID, CPUB_68040);
413         BOOTINFO1(cs->as, parameters_base, BI_MAC_MODEL, MAC_MODEL_Q800);
414         BOOTINFO1(cs->as, parameters_base,
415                   BI_MAC_MEMSIZE, ram_size >> 20); /* in MB */
416         BOOTINFO2(cs->as, parameters_base, BI_MEMCHUNK, 0, ram_size);
417         BOOTINFO1(cs->as, parameters_base, BI_MAC_VADDR, VIDEO_BASE);
418         BOOTINFO1(cs->as, parameters_base, BI_MAC_VDEPTH, graphic_depth);
419         BOOTINFO1(cs->as, parameters_base, BI_MAC_VDIM,
420                   (graphic_height << 16) | graphic_width);
421         BOOTINFO1(cs->as, parameters_base, BI_MAC_VROW,
422                   (graphic_width * graphic_depth + 7) / 8);
423         BOOTINFO1(cs->as, parameters_base, BI_MAC_SCCBASE, SCC_BASE);
424 
425         rom = g_malloc(sizeof(*rom));
426         memory_region_init_ram_ptr(rom, NULL, "m68k_fake_mac.rom",
427                                    sizeof(fake_mac_rom), fake_mac_rom);
428         memory_region_set_readonly(rom, true);
429         memory_region_add_subregion(get_system_memory(), MACROM_ADDR, rom);
430 
431         if (kernel_cmdline) {
432             BOOTINFOSTR(cs->as, parameters_base, BI_COMMAND_LINE,
433                         kernel_cmdline);
434         }
435 
436         /* load initrd */
437         if (initrd_filename) {
438             initrd_size = get_image_size(initrd_filename);
439             if (initrd_size < 0) {
440                 error_report("could not load initial ram disk '%s'",
441                              initrd_filename);
442                 exit(1);
443             }
444 
445             initrd_base = (ram_size - initrd_size) & TARGET_PAGE_MASK;
446             load_image_targphys(initrd_filename, initrd_base,
447                                 ram_size - initrd_base);
448             BOOTINFO2(cs->as, parameters_base, BI_RAMDISK, initrd_base,
449                       initrd_size);
450         } else {
451             initrd_base = 0;
452             initrd_size = 0;
453         }
454         BOOTINFO0(cs->as, parameters_base, BI_LAST);
455     } else {
456         uint8_t *ptr;
457         /* allocate and load BIOS */
458         rom = g_malloc(sizeof(*rom));
459         memory_region_init_rom(rom, NULL, "m68k_mac.rom", MACROM_SIZE,
460                                &error_abort);
461         filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
462         memory_region_add_subregion(get_system_memory(), MACROM_ADDR, rom);
463 
464         /* Load MacROM binary */
465         if (filename) {
466             bios_size = load_image_targphys(filename, MACROM_ADDR, MACROM_SIZE);
467             g_free(filename);
468         } else {
469             bios_size = -1;
470         }
471 
472         /* Remove qtest_enabled() check once firmware files are in the tree */
473         if (!qtest_enabled()) {
474             if (bios_size < 0 || bios_size > MACROM_SIZE) {
475                 error_report("could not load MacROM '%s'", bios_name);
476                 exit(1);
477             }
478 
479             ptr = rom_ptr(MACROM_ADDR, MACROM_SIZE);
480             stl_phys(cs->as, 0, ldl_p(ptr));    /* reset initial SP */
481             stl_phys(cs->as, 4,
482                      MACROM_ADDR + ldl_p(ptr + 4)); /* reset initial PC */
483         }
484     }
485 }
486 
487 static void q800_machine_class_init(ObjectClass *oc, void *data)
488 {
489     MachineClass *mc = MACHINE_CLASS(oc);
490     mc->desc = "Macintosh Quadra 800";
491     mc->init = q800_init;
492     mc->default_cpu_type = M68K_CPU_TYPE_NAME("m68040");
493     mc->max_cpus = 1;
494     mc->block_default_type = IF_SCSI;
495     mc->default_ram_id = "m68k_mac.ram";
496 }
497 
498 static const TypeInfo q800_machine_typeinfo = {
499     .name       = MACHINE_TYPE_NAME("q800"),
500     .parent     = TYPE_MACHINE,
501     .class_init = q800_machine_class_init,
502 };
503 
504 static void q800_machine_register_types(void)
505 {
506     type_register_static(&q800_machine_typeinfo);
507     type_register_static(&glue_info);
508 }
509 
510 type_init(q800_machine_register_types)
511