xref: /openbmc/qemu/hw/mips/fuloong2e.c (revision 06d4c71f)
1 /*
2  * QEMU fuloong 2e mini pc support
3  *
4  * Copyright (c) 2008 yajin (yajin@vm-kernel.org)
5  * Copyright (c) 2009 chenming (chenming@rdc.faw.com.cn)
6  * Copyright (c) 2010 Huacai Chen (zltjiangshi@gmail.com)
7  * This code is licensed under the GNU GPL v2.
8  *
9  * Contributions after 2012-01-13 are licensed under the terms of the
10  * GNU GPL, version 2 or (at your option) any later version.
11  */
12 
13 /*
14  * Fuloong 2e mini pc is based on ICT/ST Loongson 2e CPU (MIPS III like, 800MHz)
15  * https://www.linux-mips.org/wiki/Fuloong_2E
16  *
17  * Loongson 2e user manual:
18  * http://www.loongsondeveloper.com/doc/Loongson2EUserGuide.pdf
19  */
20 
21 #include "qemu/osdep.h"
22 #include "qemu-common.h"
23 #include "qemu/units.h"
24 #include "qapi/error.h"
25 #include "cpu.h"
26 #include "hw/intc/i8259.h"
27 #include "hw/dma/i8257.h"
28 #include "hw/isa/superio.h"
29 #include "net/net.h"
30 #include "hw/boards.h"
31 #include "hw/i2c/smbus_eeprom.h"
32 #include "hw/block/flash.h"
33 #include "hw/mips/mips.h"
34 #include "hw/mips/cpudevs.h"
35 #include "hw/pci/pci.h"
36 #include "qemu/log.h"
37 #include "hw/loader.h"
38 #include "hw/ide/pci.h"
39 #include "elf.h"
40 #include "hw/isa/vt82c686.h"
41 #include "hw/rtc/mc146818rtc.h"
42 #include "hw/timer/i8254.h"
43 #include "exec/address-spaces.h"
44 #include "sysemu/qtest.h"
45 #include "sysemu/reset.h"
46 #include "qemu/error-report.h"
47 
48 #define DEBUG_FULOONG2E_INIT
49 
50 #define ENVP_ADDR               0x80002000l
51 #define ENVP_NB_ENTRIES         16
52 #define ENVP_ENTRY_SIZE         256
53 
54 /* Fuloong 2e has a 512k flash: Winbond W39L040AP70Z */
55 #define BIOS_SIZE               (512 * KiB)
56 #define MAX_IDE_BUS             2
57 
58 /*
59  * PMON is not part of qemu and released with BSD license, anyone
60  * who want to build a pmon binary please first git-clone the source
61  * from the git repository at:
62  * http://www.loongson.cn/support/git/pmon
63  * Then follow the "Compile Guide" available at:
64  * http://dev.lemote.com/code/pmon
65  *
66  * Notes:
67  * 1, don't use the source at http://dev.lemote.com/http_git/pmon.git
68  * 2, use "Bonito2edev" to replace "dir_corresponding_to_your_target_hardware"
69  * in the "Compile Guide".
70  */
71 #define FULOONG_BIOSNAME "pmon_2e.bin"
72 
73 /* PCI SLOT in Fuloong 2e */
74 #define FULOONG2E_VIA_SLOT        5
75 #define FULOONG2E_ATI_SLOT        6
76 #define FULOONG2E_RTL8139_SLOT    7
77 
78 static struct _loaderparams {
79     int ram_size;
80     const char *kernel_filename;
81     const char *kernel_cmdline;
82     const char *initrd_filename;
83 } loaderparams;
84 
85 static void GCC_FMT_ATTR(3, 4) prom_set(uint32_t *prom_buf, int index,
86                                         const char *string, ...)
87 {
88     va_list ap;
89     int32_t table_addr;
90 
91     if (index >= ENVP_NB_ENTRIES) {
92         return;
93     }
94 
95     if (string == NULL) {
96         prom_buf[index] = 0;
97         return;
98     }
99 
100     table_addr = sizeof(int32_t) * ENVP_NB_ENTRIES + index * ENVP_ENTRY_SIZE;
101     prom_buf[index] = tswap32(ENVP_ADDR + table_addr);
102 
103     va_start(ap, string);
104     vsnprintf((char *)prom_buf + table_addr, ENVP_ENTRY_SIZE, string, ap);
105     va_end(ap);
106 }
107 
108 static int64_t load_kernel(CPUMIPSState *env)
109 {
110     int64_t kernel_entry, kernel_low, kernel_high, initrd_size;
111     int index = 0;
112     long kernel_size;
113     ram_addr_t initrd_offset;
114     uint32_t *prom_buf;
115     long prom_size;
116 
117     kernel_size = load_elf(loaderparams.kernel_filename, NULL,
118                            cpu_mips_kseg0_to_phys, NULL,
119                            (uint64_t *)&kernel_entry,
120                            (uint64_t *)&kernel_low, (uint64_t *)&kernel_high,
121                            NULL, 0, EM_MIPS, 1, 0);
122     if (kernel_size < 0) {
123         error_report("could not load kernel '%s': %s",
124                      loaderparams.kernel_filename,
125                      load_elf_strerror(kernel_size));
126         exit(1);
127     }
128 
129     /* load initrd */
130     initrd_size = 0;
131     initrd_offset = 0;
132     if (loaderparams.initrd_filename) {
133         initrd_size = get_image_size(loaderparams.initrd_filename);
134         if (initrd_size > 0) {
135             initrd_offset = (kernel_high + ~INITRD_PAGE_MASK) &
136                             INITRD_PAGE_MASK;
137             if (initrd_offset + initrd_size > ram_size) {
138                 error_report("memory too small for initial ram disk '%s'",
139                              loaderparams.initrd_filename);
140                 exit(1);
141             }
142             initrd_size = load_image_targphys(loaderparams.initrd_filename,
143                                               initrd_offset,
144                                               ram_size - initrd_offset);
145         }
146         if (initrd_size == (target_ulong) -1) {
147             error_report("could not load initial ram disk '%s'",
148                          loaderparams.initrd_filename);
149             exit(1);
150         }
151     }
152 
153     /* Setup prom parameters. */
154     prom_size = ENVP_NB_ENTRIES * (sizeof(int32_t) + ENVP_ENTRY_SIZE);
155     prom_buf = g_malloc(prom_size);
156 
157     prom_set(prom_buf, index++, "%s", loaderparams.kernel_filename);
158     if (initrd_size > 0) {
159         prom_set(prom_buf, index++,
160                  "rd_start=0x%" PRIx64 " rd_size=%" PRId64 " %s",
161                  cpu_mips_phys_to_kseg0(NULL, initrd_offset),
162                  initrd_size, loaderparams.kernel_cmdline);
163     } else {
164         prom_set(prom_buf, index++, "%s", loaderparams.kernel_cmdline);
165     }
166 
167     /* Setup minimum environment variables */
168     prom_set(prom_buf, index++, "busclock=33000000");
169     prom_set(prom_buf, index++, "cpuclock=100000000");
170     prom_set(prom_buf, index++, "memsize=%"PRIi64, loaderparams.ram_size / MiB);
171     prom_set(prom_buf, index++, "modetty0=38400n8r");
172     prom_set(prom_buf, index++, NULL);
173 
174     rom_add_blob_fixed("prom", prom_buf, prom_size,
175                        cpu_mips_kseg0_to_phys(NULL, ENVP_ADDR));
176 
177     g_free(prom_buf);
178     return kernel_entry;
179 }
180 
181 static void write_bootloader(CPUMIPSState *env, uint8_t *base,
182                              int64_t kernel_addr)
183 {
184     uint32_t *p;
185 
186     /* Small bootloader */
187     p = (uint32_t *)base;
188 
189     /* j 0x1fc00040 */
190     stl_p(p++, 0x0bf00010);
191     /* nop */
192     stl_p(p++, 0x00000000);
193 
194     /* Second part of the bootloader */
195     p = (uint32_t *)(base + 0x040);
196 
197     /* lui a0, 0 */
198     stl_p(p++, 0x3c040000);
199     /* ori a0, a0, 2 */
200     stl_p(p++, 0x34840002);
201     /* lui a1, high(ENVP_ADDR) */
202     stl_p(p++, 0x3c050000 | ((ENVP_ADDR >> 16) & 0xffff));
203     /* ori a1, a0, low(ENVP_ADDR) */
204     stl_p(p++, 0x34a50000 | (ENVP_ADDR & 0xffff));
205     /* lui a2, high(ENVP_ADDR + 8) */
206     stl_p(p++, 0x3c060000 | (((ENVP_ADDR + 8) >> 16) & 0xffff));
207     /* ori a2, a2, low(ENVP_ADDR + 8) */
208     stl_p(p++, 0x34c60000 | ((ENVP_ADDR + 8) & 0xffff));
209     /* lui a3, high(env->ram_size) */
210     stl_p(p++, 0x3c070000 | (loaderparams.ram_size >> 16));
211     /* ori a3, a3, low(env->ram_size) */
212     stl_p(p++, 0x34e70000 | (loaderparams.ram_size & 0xffff));
213     /* lui ra, high(kernel_addr) */
214     stl_p(p++, 0x3c1f0000 | ((kernel_addr >> 16) & 0xffff));
215     /* ori ra, ra, low(kernel_addr) */
216     stl_p(p++, 0x37ff0000 | (kernel_addr & 0xffff));
217     /* jr ra */
218     stl_p(p++, 0x03e00008);
219     /* nop */
220     stl_p(p++, 0x00000000);
221 }
222 
223 static void main_cpu_reset(void *opaque)
224 {
225     MIPSCPU *cpu = opaque;
226     CPUMIPSState *env = &cpu->env;
227 
228     cpu_reset(CPU(cpu));
229     /* TODO: 2E reset stuff */
230     if (loaderparams.kernel_filename) {
231         env->CP0_Status &= ~((1 << CP0St_BEV) | (1 << CP0St_ERL));
232     }
233 }
234 
235 static void vt82c686b_southbridge_init(PCIBus *pci_bus, int slot, qemu_irq intc,
236                                        I2CBus **i2c_bus, ISABus **p_isa_bus)
237 {
238     qemu_irq *i8259;
239     ISABus *isa_bus;
240     PCIDevice *dev;
241 
242     isa_bus = vt82c686b_isa_init(pci_bus, PCI_DEVFN(slot, 0));
243     if (!isa_bus) {
244         fprintf(stderr, "vt82c686b_init error\n");
245         exit(1);
246     }
247     *p_isa_bus = isa_bus;
248     /* Interrupt controller */
249     /* The 8259 -> IP5  */
250     i8259 = i8259_init(isa_bus, intc);
251     isa_bus_irqs(isa_bus, i8259);
252     /* init other devices */
253     i8254_pit_init(isa_bus, 0x40, 0, NULL);
254     i8257_dma_init(isa_bus, 0);
255     /* Super I/O */
256     isa_create_simple(isa_bus, TYPE_VT82C686B_SUPERIO);
257 
258     dev = pci_create_simple(pci_bus, PCI_DEVFN(slot, 1), "via-ide");
259     pci_ide_create_devs(dev);
260 
261     pci_create_simple(pci_bus, PCI_DEVFN(slot, 2), "vt82c686b-usb-uhci");
262     pci_create_simple(pci_bus, PCI_DEVFN(slot, 3), "vt82c686b-usb-uhci");
263 
264     *i2c_bus = vt82c686b_pm_init(pci_bus, PCI_DEVFN(slot, 4), 0xeee1, NULL);
265 
266     /* Audio support */
267     vt82c686b_ac97_init(pci_bus, PCI_DEVFN(slot, 5));
268     vt82c686b_mc97_init(pci_bus, PCI_DEVFN(slot, 6));
269 }
270 
271 /* Network support */
272 static void network_init(PCIBus *pci_bus)
273 {
274     int i;
275 
276     for (i = 0; i < nb_nics; i++) {
277         NICInfo *nd = &nd_table[i];
278         const char *default_devaddr = NULL;
279 
280         if (i == 0 && (!nd->model || strcmp(nd->model, "rtl8139") == 0)) {
281             /* The Fuloong board has a RTL8139 card using PCI SLOT 7 */
282             default_devaddr = "07";
283         }
284 
285         pci_nic_init_nofail(nd, pci_bus, "rtl8139", default_devaddr);
286     }
287 }
288 
289 static void mips_fuloong2e_init(MachineState *machine)
290 {
291     const char *kernel_filename = machine->kernel_filename;
292     const char *kernel_cmdline = machine->kernel_cmdline;
293     const char *initrd_filename = machine->initrd_filename;
294     char *filename;
295     MemoryRegion *address_space_mem = get_system_memory();
296     MemoryRegion *bios = g_new(MemoryRegion, 1);
297     long bios_size;
298     uint8_t *spd_data;
299     int64_t kernel_entry;
300     PCIBus *pci_bus;
301     ISABus *isa_bus;
302     I2CBus *smbus;
303     MIPSCPU *cpu;
304     CPUMIPSState *env;
305     DeviceState *dev;
306 
307     /* init CPUs */
308     cpu = MIPS_CPU(cpu_create(machine->cpu_type));
309     env = &cpu->env;
310 
311     qemu_register_reset(main_cpu_reset, cpu);
312 
313     /* TODO: support more than 256M RAM as highmem */
314     if (machine->ram_size != 256 * MiB) {
315         error_report("Invalid RAM size, should be 256MB");
316         exit(EXIT_FAILURE);
317     }
318     memory_region_add_subregion(address_space_mem, 0, machine->ram);
319 
320     /* Boot ROM */
321     memory_region_init_rom(bios, NULL, "fuloong2e.bios", BIOS_SIZE,
322                            &error_fatal);
323     memory_region_add_subregion(address_space_mem, 0x1fc00000LL, bios);
324 
325     /*
326      * We do not support flash operation, just loading pmon.bin as raw BIOS.
327      * Please use -L to set the BIOS path and -bios to set bios name.
328      */
329 
330     if (kernel_filename) {
331         loaderparams.ram_size = machine->ram_size;
332         loaderparams.kernel_filename = kernel_filename;
333         loaderparams.kernel_cmdline = kernel_cmdline;
334         loaderparams.initrd_filename = initrd_filename;
335         kernel_entry = load_kernel(env);
336         write_bootloader(env, memory_region_get_ram_ptr(bios), kernel_entry);
337     } else {
338         if (bios_name == NULL) {
339                 bios_name = FULOONG_BIOSNAME;
340         }
341         filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
342         if (filename) {
343             bios_size = load_image_targphys(filename, 0x1fc00000LL,
344                                             BIOS_SIZE);
345             g_free(filename);
346         } else {
347             bios_size = -1;
348         }
349 
350         if ((bios_size < 0 || bios_size > BIOS_SIZE) &&
351             !kernel_filename && !qtest_enabled()) {
352             error_report("Could not load MIPS bios '%s'", bios_name);
353             exit(1);
354         }
355     }
356 
357     /* Init internal devices */
358     cpu_mips_irq_init_cpu(cpu);
359     cpu_mips_clock_init(cpu);
360 
361     /* North bridge, Bonito --> IP2 */
362     pci_bus = bonito_init((qemu_irq *)&(env->irq[2]));
363 
364     /* South bridge -> IP5 */
365     vt82c686b_southbridge_init(pci_bus, FULOONG2E_VIA_SLOT, env->irq[5],
366                                &smbus, &isa_bus);
367 
368     /* GPU */
369     if (vga_interface_type != VGA_NONE) {
370         dev = DEVICE(pci_create(pci_bus, -1, "ati-vga"));
371         qdev_prop_set_uint32(dev, "vgamem_mb", 16);
372         qdev_prop_set_uint16(dev, "x-device-id", 0x5159);
373         qdev_init_nofail(dev);
374     }
375 
376     /* Populate SPD eeprom data */
377     spd_data = spd_data_generate(DDR, machine->ram_size);
378     smbus_eeprom_init_one(smbus, 0x50, spd_data);
379 
380     mc146818_rtc_init(isa_bus, 2000, NULL);
381 
382     /* Network card: RTL8139D */
383     network_init(pci_bus);
384 }
385 
386 static void mips_fuloong2e_machine_init(MachineClass *mc)
387 {
388     mc->desc = "Fuloong 2e mini pc";
389     mc->alias = "fulong2e";             /* Incorrect name used up to QEMU 4.2 */
390     mc->init = mips_fuloong2e_init;
391     mc->block_default_type = IF_IDE;
392     mc->default_cpu_type = MIPS_CPU_TYPE_NAME("Loongson-2E");
393     mc->default_ram_size = 256 * MiB;
394     mc->default_ram_id = "fuloong2e.ram";
395 }
396 
397 DEFINE_MACHINE("fuloong2e", mips_fuloong2e_machine_init)
398