1 /*
2 * Renesas SH7751R R2D-PLUS emulation
3 *
4 * Copyright (c) 2007 Magnus Damm
5 * Copyright (c) 2008 Paul Mundt
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
23 * THE SOFTWARE.
24 */
25
26 #include "qemu/osdep.h"
27 #include "qemu/units.h"
28 #include "qapi/error.h"
29 #include "qemu/error-report.h"
30 #include "cpu.h"
31 #include "hw/sysbus.h"
32 #include "hw/sh4/sh.h"
33 #include "sysemu/reset.h"
34 #include "sysemu/runstate.h"
35 #include "sysemu/sysemu.h"
36 #include "hw/boards.h"
37 #include "hw/pci/pci.h"
38 #include "hw/qdev-properties.h"
39 #include "net/net.h"
40 #include "sh7750_regs.h"
41 #include "hw/ide/mmio.h"
42 #include "hw/irq.h"
43 #include "hw/loader.h"
44 #include "hw/usb.h"
45 #include "hw/block/flash.h"
46
47 #define FLASH_BASE 0x00000000
48 #define FLASH_SIZE (16 * MiB)
49
50 #define SDRAM_BASE 0x0c000000 /* Physical location of SDRAM: Area 3 */
51 #define SDRAM_SIZE 0x04000000
52
53 #define SM501_VRAM_SIZE 0x800000
54
55 #define BOOT_PARAMS_OFFSET 0x0010000
56 /* CONFIG_BOOT_LINK_OFFSET of Linux kernel */
57 #define LINUX_LOAD_OFFSET 0x0800000
58 #define INITRD_LOAD_OFFSET 0x1800000
59
60 #define PA_IRLMSK 0x00
61 #define PA_POWOFF 0x30
62 #define PA_VERREG 0x32
63 #define PA_OUTPORT 0x36
64
65 typedef struct {
66 uint16_t bcr;
67 uint16_t irlmsk;
68 uint16_t irlmon;
69 uint16_t cfctl;
70 uint16_t cfpow;
71 uint16_t dispctl;
72 uint16_t sdmpow;
73 uint16_t rtcce;
74 uint16_t pcicd;
75 uint16_t voyagerrts;
76 uint16_t cfrst;
77 uint16_t admrts;
78 uint16_t extrst;
79 uint16_t cfcdintclr;
80 uint16_t keyctlclr;
81 uint16_t pad0;
82 uint16_t pad1;
83 uint16_t verreg;
84 uint16_t inport;
85 uint16_t outport;
86 uint16_t bverreg;
87
88 /* output pin */
89 qemu_irq irl;
90 MemoryRegion iomem;
91 } r2d_fpga_t;
92
93 enum r2d_fpga_irq {
94 PCI_INTD, CF_IDE, CF_CD, PCI_INTC, SM501, KEY, RTC_A, RTC_T,
95 SDCARD, PCI_INTA, PCI_INTB, EXT, TP,
96 NR_IRQS
97 };
98
99 static const struct { short irl; uint16_t msk; } irqtab[NR_IRQS] = {
100 [CF_IDE] = { 1, 1 << 9 },
101 [CF_CD] = { 2, 1 << 8 },
102 [PCI_INTA] = { 9, 1 << 14 },
103 [PCI_INTB] = { 10, 1 << 13 },
104 [PCI_INTC] = { 3, 1 << 12 },
105 [PCI_INTD] = { 0, 1 << 11 },
106 [SM501] = { 4, 1 << 10 },
107 [KEY] = { 5, 1 << 6 },
108 [RTC_A] = { 6, 1 << 5 },
109 [RTC_T] = { 7, 1 << 4 },
110 [SDCARD] = { 8, 1 << 7 },
111 [EXT] = { 11, 1 << 0 },
112 [TP] = { 12, 1 << 15 },
113 };
114
update_irl(r2d_fpga_t * fpga)115 static void update_irl(r2d_fpga_t *fpga)
116 {
117 int i, irl = 15;
118 for (i = 0; i < NR_IRQS; i++) {
119 if ((fpga->irlmon & fpga->irlmsk & irqtab[i].msk) &&
120 irqtab[i].irl < irl) {
121 irl = irqtab[i].irl;
122 }
123 }
124 qemu_set_irq(fpga->irl, irl ^ 15);
125 }
126
r2d_fpga_irq_set(void * opaque,int n,int level)127 static void r2d_fpga_irq_set(void *opaque, int n, int level)
128 {
129 r2d_fpga_t *fpga = opaque;
130 if (level) {
131 fpga->irlmon |= irqtab[n].msk;
132 } else {
133 fpga->irlmon &= ~irqtab[n].msk;
134 }
135 update_irl(fpga);
136 }
137
r2d_fpga_read(void * opaque,hwaddr addr,unsigned int size)138 static uint64_t r2d_fpga_read(void *opaque, hwaddr addr, unsigned int size)
139 {
140 r2d_fpga_t *s = opaque;
141
142 switch (addr) {
143 case PA_IRLMSK:
144 return s->irlmsk;
145 case PA_OUTPORT:
146 return s->outport;
147 case PA_POWOFF:
148 return 0x00;
149 case PA_VERREG:
150 return 0x10;
151 }
152
153 return 0;
154 }
155
156 static void
r2d_fpga_write(void * opaque,hwaddr addr,uint64_t value,unsigned int size)157 r2d_fpga_write(void *opaque, hwaddr addr, uint64_t value, unsigned int size)
158 {
159 r2d_fpga_t *s = opaque;
160
161 switch (addr) {
162 case PA_IRLMSK:
163 s->irlmsk = value;
164 update_irl(s);
165 break;
166 case PA_OUTPORT:
167 s->outport = value;
168 break;
169 case PA_POWOFF:
170 if (value & 1) {
171 qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
172 }
173 break;
174 case PA_VERREG:
175 /* Discard writes */
176 break;
177 }
178 }
179
180 static const MemoryRegionOps r2d_fpga_ops = {
181 .read = r2d_fpga_read,
182 .write = r2d_fpga_write,
183 .impl.min_access_size = 2,
184 .impl.max_access_size = 2,
185 .endianness = DEVICE_NATIVE_ENDIAN,
186 };
187
r2d_fpga_init(MemoryRegion * sysmem,hwaddr base,qemu_irq irl)188 static qemu_irq *r2d_fpga_init(MemoryRegion *sysmem,
189 hwaddr base, qemu_irq irl)
190 {
191 r2d_fpga_t *s;
192
193 s = g_new0(r2d_fpga_t, 1);
194
195 s->irl = irl;
196
197 memory_region_init_io(&s->iomem, NULL, &r2d_fpga_ops, s, "r2d-fpga", 0x40);
198 memory_region_add_subregion(sysmem, base, &s->iomem);
199 return qemu_allocate_irqs(r2d_fpga_irq_set, s, NR_IRQS);
200 }
201
202 typedef struct ResetData {
203 SuperHCPU *cpu;
204 uint32_t vector;
205 } ResetData;
206
main_cpu_reset(void * opaque)207 static void main_cpu_reset(void *opaque)
208 {
209 ResetData *s = (ResetData *)opaque;
210 CPUSH4State *env = &s->cpu->env;
211
212 cpu_reset(CPU(s->cpu));
213 env->pc = s->vector;
214 }
215
216 static struct QEMU_PACKED
217 {
218 int mount_root_rdonly;
219 int ramdisk_flags;
220 int orig_root_dev;
221 int loader_type;
222 int initrd_start;
223 int initrd_size;
224
225 char pad[232];
226
227 char kernel_cmdline[256] QEMU_NONSTRING;
228 } boot_params;
229
r2d_init(MachineState * machine)230 static void r2d_init(MachineState *machine)
231 {
232 const char *kernel_filename = machine->kernel_filename;
233 const char *kernel_cmdline = machine->kernel_cmdline;
234 const char *initrd_filename = machine->initrd_filename;
235 MachineClass *mc = MACHINE_GET_CLASS(machine);
236 SuperHCPU *cpu;
237 CPUSH4State *env;
238 ResetData *reset_info;
239 struct SH7750State *s;
240 MemoryRegion *sdram = g_new(MemoryRegion, 1);
241 qemu_irq *irq;
242 DriveInfo *dinfo;
243 DeviceState *dev;
244 SysBusDevice *busdev;
245 MemoryRegion *address_space_mem = get_system_memory();
246 PCIBus *pci_bus;
247 USBBus *usb_bus;
248
249 cpu = SUPERH_CPU(cpu_create(machine->cpu_type));
250 env = &cpu->env;
251
252 reset_info = g_new0(ResetData, 1);
253 reset_info->cpu = cpu;
254 reset_info->vector = env->pc;
255 qemu_register_reset(main_cpu_reset, reset_info);
256
257 /* Allocate memory space */
258 memory_region_init_ram(sdram, NULL, "r2d.sdram", SDRAM_SIZE, &error_fatal);
259 memory_region_add_subregion(address_space_mem, SDRAM_BASE, sdram);
260 /* Register peripherals */
261 s = sh7750_init(cpu, address_space_mem);
262 irq = r2d_fpga_init(address_space_mem, 0x04000000, sh7750_irl(s));
263
264 dev = qdev_new("sh_pci");
265 busdev = SYS_BUS_DEVICE(dev);
266 sysbus_realize_and_unref(busdev, &error_fatal);
267 pci_bus = PCI_BUS(qdev_get_child_bus(dev, "pci"));
268 sysbus_mmio_map(busdev, 0, P4ADDR(0x1e200000));
269 sysbus_mmio_map(busdev, 1, A7ADDR(0x1e200000));
270 sysbus_connect_irq(busdev, 0, irq[PCI_INTA]);
271 sysbus_connect_irq(busdev, 1, irq[PCI_INTB]);
272 sysbus_connect_irq(busdev, 2, irq[PCI_INTC]);
273 sysbus_connect_irq(busdev, 3, irq[PCI_INTD]);
274
275 dev = qdev_new("sysbus-sm501");
276 busdev = SYS_BUS_DEVICE(dev);
277 qdev_prop_set_uint32(dev, "vram-size", SM501_VRAM_SIZE);
278 qdev_prop_set_uint64(dev, "dma-offset", 0x10000000);
279 qdev_prop_set_chr(dev, "chardev", serial_hd(2));
280 sysbus_realize_and_unref(busdev, &error_fatal);
281 sysbus_mmio_map(busdev, 0, 0x10000000);
282 sysbus_mmio_map(busdev, 1, 0x13e00000);
283 sysbus_connect_irq(busdev, 0, irq[SM501]);
284
285 /* onboard CF (True IDE mode, Master only). */
286 dinfo = drive_get(IF_IDE, 0, 0);
287 dev = qdev_new("mmio-ide");
288 busdev = SYS_BUS_DEVICE(dev);
289 sysbus_connect_irq(busdev, 0, irq[CF_IDE]);
290 qdev_prop_set_uint32(dev, "shift", 1);
291 sysbus_realize_and_unref(busdev, &error_fatal);
292 sysbus_mmio_map(busdev, 0, 0x14001000);
293 sysbus_mmio_map(busdev, 1, 0x1400080c);
294 mmio_ide_init_drives(dev, dinfo, NULL);
295
296 /*
297 * Onboard flash memory
298 * According to the old board user document in Japanese (under
299 * NDA) what is referred to as FROM (Area0) is connected via a
300 * 32-bit bus and CS0 to CN8. The docs mention a Cypress
301 * S29PL127J60TFI130 chipsset. Per the 'S29PL-J 002-00615
302 * Rev. *E' datasheet, it is a 128Mbit NOR parallel flash
303 * addressable in words of 16bit.
304 */
305 dinfo = drive_get(IF_PFLASH, 0, 0);
306 pflash_cfi02_register(0x0, "r2d.flash", FLASH_SIZE,
307 dinfo ? blk_by_legacy_dinfo(dinfo) : NULL,
308 64 * KiB, 1, 2, 0x0001, 0x227e, 0x2220, 0x2200,
309 0x555, 0x2aa, 0);
310
311 /* NIC: rtl8139 on-board, and 2 slots. */
312 pci_init_nic_in_slot(pci_bus, mc->default_nic, NULL, "2");
313 pci_init_nic_devices(pci_bus, mc->default_nic);
314
315 /* USB keyboard */
316 usb_bus = USB_BUS(object_resolve_type_unambiguous(TYPE_USB_BUS,
317 &error_abort));
318 usb_create_simple(usb_bus, "usb-kbd");
319
320 /* Todo: register on board registers */
321 memset(&boot_params, 0, sizeof(boot_params));
322
323 if (kernel_filename) {
324 int kernel_size;
325
326 kernel_size = load_image_targphys(kernel_filename,
327 SDRAM_BASE + LINUX_LOAD_OFFSET,
328 INITRD_LOAD_OFFSET - LINUX_LOAD_OFFSET);
329 if (kernel_size < 0) {
330 error_report("qemu: could not load kernel '%s'", kernel_filename);
331 exit(1);
332 }
333
334 /* initialization which should be done by firmware */
335 address_space_stl(&address_space_memory, SH7750_BCR1, 1 << 3,
336 MEMTXATTRS_UNSPECIFIED, NULL); /* cs3 SDRAM */
337 address_space_stw(&address_space_memory, SH7750_BCR2, 3 << (3 * 2),
338 MEMTXATTRS_UNSPECIFIED, NULL); /* cs3 32bit */
339 /* Start from P2 area */
340 reset_info->vector = (SDRAM_BASE + LINUX_LOAD_OFFSET) | 0xa0000000;
341 }
342
343 if (initrd_filename) {
344 int initrd_size;
345
346 initrd_size = load_image_targphys(initrd_filename,
347 SDRAM_BASE + INITRD_LOAD_OFFSET,
348 SDRAM_SIZE - INITRD_LOAD_OFFSET);
349
350 if (initrd_size < 0) {
351 error_report("qemu: could not load initrd '%s'", initrd_filename);
352 exit(1);
353 }
354
355 /* initialization which should be done by firmware */
356 boot_params.loader_type = tswap32(1);
357 boot_params.initrd_start = tswap32(INITRD_LOAD_OFFSET);
358 boot_params.initrd_size = tswap32(initrd_size);
359 }
360
361 if (kernel_cmdline) {
362 /*
363 * I see no evidence that this .kernel_cmdline buffer requires
364 * NUL-termination, so using strncpy should be ok.
365 */
366 strncpy(boot_params.kernel_cmdline, kernel_cmdline,
367 sizeof(boot_params.kernel_cmdline));
368 }
369
370 rom_add_blob_fixed("boot_params", &boot_params, sizeof(boot_params),
371 SDRAM_BASE + BOOT_PARAMS_OFFSET);
372 }
373
r2d_machine_init(MachineClass * mc)374 static void r2d_machine_init(MachineClass *mc)
375 {
376 mc->desc = "r2d-plus board";
377 mc->init = r2d_init;
378 mc->block_default_type = IF_IDE;
379 mc->default_cpu_type = TYPE_SH7751R_CPU;
380 mc->default_nic = "rtl8139";
381 }
382
383 DEFINE_MACHINE("r2d", r2d_machine_init)
384