xref: /openbmc/qemu/hw/sh4/r2d.c (revision 30e702ab)
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 "cpu.h"
30 #include "hw/sysbus.h"
31 #include "hw/sh4/sh.h"
32 #include "sysemu/reset.h"
33 #include "sysemu/runstate.h"
34 #include "sysemu/sysemu.h"
35 #include "hw/boards.h"
36 #include "hw/pci/pci.h"
37 #include "hw/qdev-properties.h"
38 #include "net/net.h"
39 #include "sh7750_regs.h"
40 #include "hw/ide.h"
41 #include "hw/irq.h"
42 #include "hw/loader.h"
43 #include "hw/usb.h"
44 #include "hw/block/flash.h"
45 
46 #define FLASH_BASE 0x00000000
47 #define FLASH_SIZE (16 * MiB)
48 
49 #define SDRAM_BASE 0x0c000000 /* Physical location of SDRAM: Area 3 */
50 #define SDRAM_SIZE 0x04000000
51 
52 #define SM501_VRAM_SIZE 0x800000
53 
54 #define BOOT_PARAMS_OFFSET 0x0010000
55 /* CONFIG_BOOT_LINK_OFFSET of Linux kernel */
56 #define LINUX_LOAD_OFFSET  0x0800000
57 #define INITRD_LOAD_OFFSET 0x1800000
58 
59 #define PA_IRLMSK	0x00
60 #define PA_POWOFF	0x30
61 #define PA_VERREG	0x32
62 #define PA_OUTPORT	0x36
63 
64 typedef struct {
65     uint16_t bcr;
66     uint16_t irlmsk;
67     uint16_t irlmon;
68     uint16_t cfctl;
69     uint16_t cfpow;
70     uint16_t dispctl;
71     uint16_t sdmpow;
72     uint16_t rtcce;
73     uint16_t pcicd;
74     uint16_t voyagerrts;
75     uint16_t cfrst;
76     uint16_t admrts;
77     uint16_t extrst;
78     uint16_t cfcdintclr;
79     uint16_t keyctlclr;
80     uint16_t pad0;
81     uint16_t pad1;
82     uint16_t verreg;
83     uint16_t inport;
84     uint16_t outport;
85     uint16_t bverreg;
86 
87 /* output pin */
88     qemu_irq irl;
89     MemoryRegion iomem;
90 } r2d_fpga_t;
91 
92 enum r2d_fpga_irq {
93     PCI_INTD, CF_IDE, CF_CD, PCI_INTC, SM501, KEY, RTC_A, RTC_T,
94     SDCARD, PCI_INTA, PCI_INTB, EXT, TP,
95     NR_IRQS
96 };
97 
98 static const struct { short irl; uint16_t msk; } irqtab[NR_IRQS] = {
99     [CF_IDE]	= {  1, 1<<9 },
100     [CF_CD]	= {  2, 1<<8 },
101     [PCI_INTA]	= {  9, 1<<14 },
102     [PCI_INTB]	= { 10, 1<<13 },
103     [PCI_INTC]	= {  3, 1<<12 },
104     [PCI_INTD]	= {  0, 1<<11 },
105     [SM501]	= {  4, 1<<10 },
106     [KEY]	= {  5, 1<<6 },
107     [RTC_A]	= {  6, 1<<5 },
108     [RTC_T]	= {  7, 1<<4 },
109     [SDCARD]	= {  8, 1<<7 },
110     [EXT]	= { 11, 1<<0 },
111     [TP]	= { 12, 1<<15 },
112 };
113 
114 static void update_irl(r2d_fpga_t *fpga)
115 {
116     int i, irl = 15;
117     for (i = 0; i < NR_IRQS; i++)
118         if (fpga->irlmon & fpga->irlmsk & irqtab[i].msk)
119             if (irqtab[i].irl < irl)
120                 irl = irqtab[i].irl;
121     qemu_set_irq(fpga->irl, irl ^ 15);
122 }
123 
124 static void r2d_fpga_irq_set(void *opaque, int n, int level)
125 {
126     r2d_fpga_t *fpga = opaque;
127     if (level)
128         fpga->irlmon |= irqtab[n].msk;
129     else
130         fpga->irlmon &= ~irqtab[n].msk;
131     update_irl(fpga);
132 }
133 
134 static uint64_t r2d_fpga_read(void *opaque, hwaddr addr, unsigned int size)
135 {
136     r2d_fpga_t *s = opaque;
137 
138     switch (addr) {
139     case PA_IRLMSK:
140         return s->irlmsk;
141     case PA_OUTPORT:
142         return s->outport;
143     case PA_POWOFF:
144         return 0x00;
145     case PA_VERREG:
146         return 0x10;
147     }
148 
149     return 0;
150 }
151 
152 static void
153 r2d_fpga_write(void *opaque, hwaddr addr, uint64_t value, unsigned int size)
154 {
155     r2d_fpga_t *s = opaque;
156 
157     switch (addr) {
158     case PA_IRLMSK:
159         s->irlmsk = value;
160         update_irl(s);
161         break;
162     case PA_OUTPORT:
163         s->outport = value;
164         break;
165     case PA_POWOFF:
166         if (value & 1) {
167             qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
168         }
169         break;
170     case PA_VERREG:
171         /* Discard writes */
172         break;
173     }
174 }
175 
176 static const MemoryRegionOps r2d_fpga_ops = {
177     .read = r2d_fpga_read,
178     .write = r2d_fpga_write,
179     .impl.min_access_size = 2,
180     .impl.max_access_size = 2,
181     .endianness = DEVICE_NATIVE_ENDIAN,
182 };
183 
184 static qemu_irq *r2d_fpga_init(MemoryRegion *sysmem,
185                                hwaddr base, qemu_irq irl)
186 {
187     r2d_fpga_t *s;
188 
189     s = g_malloc0(sizeof(r2d_fpga_t));
190 
191     s->irl = irl;
192 
193     memory_region_init_io(&s->iomem, NULL, &r2d_fpga_ops, s, "r2d-fpga", 0x40);
194     memory_region_add_subregion(sysmem, base, &s->iomem);
195     return qemu_allocate_irqs(r2d_fpga_irq_set, s, NR_IRQS);
196 }
197 
198 typedef struct ResetData {
199     SuperHCPU *cpu;
200     uint32_t vector;
201 } ResetData;
202 
203 static void main_cpu_reset(void *opaque)
204 {
205     ResetData *s = (ResetData *)opaque;
206     CPUSH4State *env = &s->cpu->env;
207 
208     cpu_reset(CPU(s->cpu));
209     env->pc = s->vector;
210 }
211 
212 static struct QEMU_PACKED
213 {
214     int mount_root_rdonly;
215     int ramdisk_flags;
216     int orig_root_dev;
217     int loader_type;
218     int initrd_start;
219     int initrd_size;
220 
221     char pad[232];
222 
223     char kernel_cmdline[256] QEMU_NONSTRING;
224 } boot_params;
225 
226 static void r2d_init(MachineState *machine)
227 {
228     const char *kernel_filename = machine->kernel_filename;
229     const char *kernel_cmdline = machine->kernel_cmdline;
230     const char *initrd_filename = machine->initrd_filename;
231     SuperHCPU *cpu;
232     CPUSH4State *env;
233     ResetData *reset_info;
234     struct SH7750State *s;
235     MemoryRegion *sdram = g_new(MemoryRegion, 1);
236     qemu_irq *irq;
237     DriveInfo *dinfo;
238     int i;
239     DeviceState *dev;
240     SysBusDevice *busdev;
241     MemoryRegion *address_space_mem = get_system_memory();
242     PCIBus *pci_bus;
243 
244     cpu = SUPERH_CPU(cpu_create(machine->cpu_type));
245     env = &cpu->env;
246 
247     reset_info = g_malloc0(sizeof(ResetData));
248     reset_info->cpu = cpu;
249     reset_info->vector = env->pc;
250     qemu_register_reset(main_cpu_reset, reset_info);
251 
252     /* Allocate memory space */
253     memory_region_init_ram(sdram, NULL, "r2d.sdram", SDRAM_SIZE, &error_fatal);
254     memory_region_add_subregion(address_space_mem, SDRAM_BASE, sdram);
255     /* Register peripherals */
256     s = sh7750_init(cpu, address_space_mem);
257     irq = r2d_fpga_init(address_space_mem, 0x04000000, sh7750_irl(s));
258 
259     dev = qdev_new("sh_pci");
260     busdev = SYS_BUS_DEVICE(dev);
261     sysbus_realize_and_unref(busdev, &error_fatal);
262     pci_bus = PCI_BUS(qdev_get_child_bus(dev, "pci"));
263     sysbus_mmio_map(busdev, 0, P4ADDR(0x1e200000));
264     sysbus_mmio_map(busdev, 1, A7ADDR(0x1e200000));
265     sysbus_connect_irq(busdev, 0, irq[PCI_INTA]);
266     sysbus_connect_irq(busdev, 1, irq[PCI_INTB]);
267     sysbus_connect_irq(busdev, 2, irq[PCI_INTC]);
268     sysbus_connect_irq(busdev, 3, irq[PCI_INTD]);
269 
270     dev = qdev_new("sysbus-sm501");
271     busdev = SYS_BUS_DEVICE(dev);
272     qdev_prop_set_uint32(dev, "vram-size", SM501_VRAM_SIZE);
273     qdev_prop_set_uint32(dev, "base", 0x10000000);
274     qdev_prop_set_chr(dev, "chardev", serial_hd(2));
275     sysbus_realize_and_unref(busdev, &error_fatal);
276     sysbus_mmio_map(busdev, 0, 0x10000000);
277     sysbus_mmio_map(busdev, 1, 0x13e00000);
278     sysbus_connect_irq(busdev, 0, irq[SM501]);
279 
280     /* onboard CF (True IDE mode, Master only). */
281     dinfo = drive_get(IF_IDE, 0, 0);
282     dev = qdev_new("mmio-ide");
283     busdev = SYS_BUS_DEVICE(dev);
284     sysbus_connect_irq(busdev, 0, irq[CF_IDE]);
285     qdev_prop_set_uint32(dev, "shift", 1);
286     sysbus_realize_and_unref(busdev, &error_fatal);
287     sysbus_mmio_map(busdev, 0, 0x14001000);
288     sysbus_mmio_map(busdev, 1, 0x1400080c);
289     mmio_ide_init_drives(dev, dinfo, NULL);
290 
291     /*
292      * Onboard flash memory
293      * According to the old board user document in Japanese (under
294      * NDA) what is referred to as FROM (Area0) is connected via a
295      * 32-bit bus and CS0 to CN8. The docs mention a Cypress
296      * S29PL127J60TFI130 chipsset.  Per the 'S29PL-J 002-00615
297      * Rev. *E' datasheet, it is a 128Mbit NOR parallel flash
298      * addressable in words of 16bit.
299      */
300     dinfo = drive_get(IF_PFLASH, 0, 0);
301     pflash_cfi02_register(0x0, "r2d.flash", FLASH_SIZE,
302                           dinfo ? blk_by_legacy_dinfo(dinfo) : NULL,
303                           64 * KiB, 1, 2, 0x0001, 0x227e, 0x2220, 0x2200,
304                           0x555, 0x2aa, 0);
305 
306     /* NIC: rtl8139 on-board, and 2 slots. */
307     for (i = 0; i < nb_nics; i++)
308         pci_nic_init_nofail(&nd_table[i], pci_bus,
309                             "rtl8139", i==0 ? "2" : NULL);
310 
311     /* USB keyboard */
312     usb_create_simple(usb_bus_find(-1), "usb-kbd");
313 
314     /* Todo: register on board registers */
315     memset(&boot_params, 0, sizeof(boot_params));
316 
317     if (kernel_filename) {
318         int kernel_size;
319 
320         kernel_size = load_image_targphys(kernel_filename,
321                                           SDRAM_BASE + LINUX_LOAD_OFFSET,
322                                           INITRD_LOAD_OFFSET - LINUX_LOAD_OFFSET);
323         if (kernel_size < 0) {
324           fprintf(stderr, "qemu: could not load kernel '%s'\n", kernel_filename);
325           exit(1);
326         }
327 
328         /* initialization which should be done by firmware */
329         address_space_stl(&address_space_memory, SH7750_BCR1, 1 << 3,
330                           MEMTXATTRS_UNSPECIFIED, NULL); /* cs3 SDRAM */
331         address_space_stw(&address_space_memory, SH7750_BCR2, 3 << (3 * 2),
332                           MEMTXATTRS_UNSPECIFIED, NULL); /* cs3 32bit */
333         reset_info->vector = (SDRAM_BASE + LINUX_LOAD_OFFSET) | 0xa0000000; /* Start from P2 area */
334     }
335 
336     if (initrd_filename) {
337         int initrd_size;
338 
339         initrd_size = load_image_targphys(initrd_filename,
340                                           SDRAM_BASE + INITRD_LOAD_OFFSET,
341                                           SDRAM_SIZE - INITRD_LOAD_OFFSET);
342 
343         if (initrd_size < 0) {
344           fprintf(stderr, "qemu: could not load initrd '%s'\n", initrd_filename);
345           exit(1);
346         }
347 
348         /* initialization which should be done by firmware */
349         boot_params.loader_type = tswap32(1);
350         boot_params.initrd_start = tswap32(INITRD_LOAD_OFFSET);
351         boot_params.initrd_size = tswap32(initrd_size);
352     }
353 
354     if (kernel_cmdline) {
355         /* I see no evidence that this .kernel_cmdline buffer requires
356            NUL-termination, so using strncpy should be ok. */
357         strncpy(boot_params.kernel_cmdline, kernel_cmdline,
358                 sizeof(boot_params.kernel_cmdline));
359     }
360 
361     rom_add_blob_fixed("boot_params", &boot_params, sizeof(boot_params),
362                        SDRAM_BASE + BOOT_PARAMS_OFFSET);
363 }
364 
365 static void r2d_machine_init(MachineClass *mc)
366 {
367     mc->desc = "r2d-plus board";
368     mc->init = r2d_init;
369     mc->block_default_type = IF_IDE;
370     mc->default_cpu_type = TYPE_SH7751R_CPU;
371 }
372 
373 DEFINE_MACHINE("r2d", r2d_machine_init)
374