b3ecc1e3474402ce45cb76df006e69c32ba904f7
[qemu/qemu-JZ.git] / hw / sun4u.c
blobb3ecc1e3474402ce45cb76df006e69c32ba904f7
1 /*
2 * QEMU Sun4u/Sun4v System Emulator
4 * Copyright (c) 2005 Fabrice Bellard
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
24 #include "hw.h"
25 #include "pci.h"
26 #include "pc.h"
27 #include "nvram.h"
28 #include "fdc.h"
29 #include "net.h"
30 #include "qemu-timer.h"
31 #include "sysemu.h"
32 #include "boards.h"
33 #include "firmware_abi.h"
34 #include "fw_cfg.h"
36 //#define DEBUG_IRQ
38 #ifdef DEBUG_IRQ
39 #define DPRINTF(fmt, args...) \
40 do { printf("CPUIRQ: " fmt , ##args); } while (0)
41 #else
42 #define DPRINTF(fmt, args...)
43 #endif
45 #define KERNEL_LOAD_ADDR 0x00404000
46 #define CMDLINE_ADDR 0x003ff000
47 #define INITRD_LOAD_ADDR 0x00300000
48 #define PROM_SIZE_MAX (4 * 1024 * 1024)
49 #define PROM_VADDR 0x000ffd00000ULL
50 #define APB_SPECIAL_BASE 0x1fe00000000ULL
51 #define APB_MEM_BASE 0x1ff00000000ULL
52 #define VGA_BASE (APB_MEM_BASE + 0x400000ULL)
53 #define PROM_FILENAME "openbios-sparc64"
54 #define NVRAM_SIZE 0x2000
55 #define MAX_IDE_BUS 2
56 #define BIOS_CFG_IOPORT 0x510
58 #define MAX_PILS 16
60 #define TICK_INT_DIS 0x8000000000000000ULL
61 #define TICK_MAX 0x7fffffffffffffffULL
63 struct hwdef {
64 const char * const default_cpu_model;
65 uint16_t machine_id;
66 uint64_t prom_addr;
67 uint64_t console_serial_base;
70 int DMA_get_channel_mode (int nchan)
72 return 0;
74 int DMA_read_memory (int nchan, void *buf, int pos, int size)
76 return 0;
78 int DMA_write_memory (int nchan, void *buf, int pos, int size)
80 return 0;
82 void DMA_hold_DREQ (int nchan) {}
83 void DMA_release_DREQ (int nchan) {}
84 void DMA_schedule(int nchan) {}
85 void DMA_init (int high_page_enable) {}
86 void DMA_register_channel (int nchan,
87 DMA_transfer_handler transfer_handler,
88 void *opaque)
92 static int nvram_boot_set(void *opaque, const char *boot_device)
94 unsigned int i;
95 uint8_t image[sizeof(ohwcfg_v3_t)];
96 ohwcfg_v3_t *header = (ohwcfg_v3_t *)ℑ
97 m48t59_t *nvram = (m48t59_t *)opaque;
99 for (i = 0; i < sizeof(image); i++)
100 image[i] = m48t59_read(nvram, i) & 0xff;
102 pstrcpy((char *)header->boot_devices, sizeof(header->boot_devices),
103 boot_device);
104 header->nboot_devices = strlen(boot_device) & 0xff;
105 header->crc = cpu_to_be16(OHW_compute_crc(header, 0x00, 0xF8));
107 for (i = 0; i < sizeof(image); i++)
108 m48t59_write(nvram, i, image[i]);
110 return 0;
113 static int sun4u_NVRAM_set_params (m48t59_t *nvram, uint16_t NVRAM_size,
114 const char *arch,
115 ram_addr_t RAM_size,
116 const char *boot_devices,
117 uint32_t kernel_image, uint32_t kernel_size,
118 const char *cmdline,
119 uint32_t initrd_image, uint32_t initrd_size,
120 uint32_t NVRAM_image,
121 int width, int height, int depth,
122 const uint8_t *macaddr)
124 unsigned int i;
125 uint32_t start, end;
126 uint8_t image[0x1ff0];
127 ohwcfg_v3_t *header = (ohwcfg_v3_t *)&image;
128 struct sparc_arch_cfg *sparc_header;
129 struct OpenBIOS_nvpart_v1 *part_header;
131 memset(image, '\0', sizeof(image));
133 // Try to match PPC NVRAM
134 pstrcpy((char *)header->struct_ident, sizeof(header->struct_ident),
135 "QEMU_BIOS");
136 header->struct_version = cpu_to_be32(3); /* structure v3 */
138 header->nvram_size = cpu_to_be16(NVRAM_size);
139 header->nvram_arch_ptr = cpu_to_be16(sizeof(ohwcfg_v3_t));
140 header->nvram_arch_size = cpu_to_be16(sizeof(struct sparc_arch_cfg));
141 pstrcpy((char *)header->arch, sizeof(header->arch), arch);
142 header->nb_cpus = smp_cpus & 0xff;
143 header->RAM0_base = 0;
144 header->RAM0_size = cpu_to_be64((uint64_t)RAM_size);
145 pstrcpy((char *)header->boot_devices, sizeof(header->boot_devices),
146 boot_devices);
147 header->nboot_devices = strlen(boot_devices) & 0xff;
148 header->kernel_image = cpu_to_be64((uint64_t)kernel_image);
149 header->kernel_size = cpu_to_be64((uint64_t)kernel_size);
150 if (cmdline) {
151 pstrcpy_targphys(CMDLINE_ADDR, TARGET_PAGE_SIZE, cmdline);
152 header->cmdline = cpu_to_be64((uint64_t)CMDLINE_ADDR);
153 header->cmdline_size = cpu_to_be64((uint64_t)strlen(cmdline));
155 header->initrd_image = cpu_to_be64((uint64_t)initrd_image);
156 header->initrd_size = cpu_to_be64((uint64_t)initrd_size);
157 header->NVRAM_image = cpu_to_be64((uint64_t)NVRAM_image);
159 header->width = cpu_to_be16(width);
160 header->height = cpu_to_be16(height);
161 header->depth = cpu_to_be16(depth);
162 if (nographic)
163 header->graphic_flags = cpu_to_be16(OHW_GF_NOGRAPHICS);
165 header->crc = cpu_to_be16(OHW_compute_crc(header, 0x00, 0xF8));
167 // Architecture specific header
168 start = sizeof(ohwcfg_v3_t);
169 sparc_header = (struct sparc_arch_cfg *)&image[start];
170 sparc_header->valid = 0;
171 start += sizeof(struct sparc_arch_cfg);
173 // OpenBIOS nvram variables
174 // Variable partition
175 part_header = (struct OpenBIOS_nvpart_v1 *)&image[start];
176 part_header->signature = OPENBIOS_PART_SYSTEM;
177 pstrcpy(part_header->name, sizeof(part_header->name), "system");
179 end = start + sizeof(struct OpenBIOS_nvpart_v1);
180 for (i = 0; i < nb_prom_envs; i++)
181 end = OpenBIOS_set_var(image, end, prom_envs[i]);
183 // End marker
184 image[end++] = '\0';
186 end = start + ((end - start + 15) & ~15);
187 OpenBIOS_finish_partition(part_header, end - start);
189 // free partition
190 start = end;
191 part_header = (struct OpenBIOS_nvpart_v1 *)&image[start];
192 part_header->signature = OPENBIOS_PART_FREE;
193 pstrcpy(part_header->name, sizeof(part_header->name), "free");
195 end = 0x1fd0;
196 OpenBIOS_finish_partition(part_header, end - start);
198 Sun_init_header((struct Sun_nvram *)&image[0x1fd8], macaddr, 0x80);
200 for (i = 0; i < sizeof(image); i++)
201 m48t59_write(nvram, i, image[i]);
203 qemu_register_boot_set(nvram_boot_set, nvram);
205 return 0;
208 void pic_info(void)
212 void irq_info(void)
216 void cpu_check_irqs(CPUState *env)
218 uint32_t pil = env->pil_in | (env->softint & ~SOFTINT_TIMER) |
219 ((env->softint & SOFTINT_TIMER) << 14);
221 if (pil && (env->interrupt_index == 0 ||
222 (env->interrupt_index & ~15) == TT_EXTINT)) {
223 unsigned int i;
225 for (i = 15; i > 0; i--) {
226 if (pil & (1 << i)) {
227 int old_interrupt = env->interrupt_index;
229 env->interrupt_index = TT_EXTINT | i;
230 if (old_interrupt != env->interrupt_index) {
231 DPRINTF("Set CPU IRQ %d\n", i);
232 cpu_interrupt(env, CPU_INTERRUPT_HARD);
234 break;
237 } else if (!pil && (env->interrupt_index & ~15) == TT_EXTINT) {
238 DPRINTF("Reset CPU IRQ %d\n", env->interrupt_index & 15);
239 env->interrupt_index = 0;
240 cpu_reset_interrupt(env, CPU_INTERRUPT_HARD);
244 static void cpu_set_irq(void *opaque, int irq, int level)
246 CPUState *env = opaque;
248 if (level) {
249 DPRINTF("Raise CPU IRQ %d\n", irq);
250 env->halted = 0;
251 env->pil_in |= 1 << irq;
252 cpu_check_irqs(env);
253 } else {
254 DPRINTF("Lower CPU IRQ %d\n", irq);
255 env->pil_in &= ~(1 << irq);
256 cpu_check_irqs(env);
260 void qemu_system_powerdown(void)
264 typedef struct ResetData {
265 CPUState *env;
266 uint64_t reset_addr;
267 } ResetData;
269 static void main_cpu_reset(void *opaque)
271 ResetData *s = (ResetData *)opaque;
272 CPUState *env = s->env;
274 cpu_reset(env);
275 env->tick_cmpr = TICK_INT_DIS | 0;
276 ptimer_set_limit(env->tick, TICK_MAX, 1);
277 ptimer_run(env->tick, 0);
278 env->stick_cmpr = TICK_INT_DIS | 0;
279 ptimer_set_limit(env->stick, TICK_MAX, 1);
280 ptimer_run(env->stick, 0);
281 env->hstick_cmpr = TICK_INT_DIS | 0;
282 ptimer_set_limit(env->hstick, TICK_MAX, 1);
283 ptimer_run(env->hstick, 0);
284 env->gregs[1] = 0; // Memory start
285 env->gregs[2] = ram_size; // Memory size
286 env->gregs[3] = 0; // Machine description XXX
287 env->pc = s->reset_addr;
288 env->npc = env->pc + 4;
291 static void tick_irq(void *opaque)
293 CPUState *env = opaque;
295 if (!(env->tick_cmpr & TICK_INT_DIS)) {
296 env->softint |= SOFTINT_TIMER;
297 cpu_interrupt(env, CPU_INTERRUPT_TIMER);
301 static void stick_irq(void *opaque)
303 CPUState *env = opaque;
305 if (!(env->stick_cmpr & TICK_INT_DIS)) {
306 env->softint |= SOFTINT_STIMER;
307 cpu_interrupt(env, CPU_INTERRUPT_TIMER);
311 static void hstick_irq(void *opaque)
313 CPUState *env = opaque;
315 if (!(env->hstick_cmpr & TICK_INT_DIS)) {
316 cpu_interrupt(env, CPU_INTERRUPT_TIMER);
320 void cpu_tick_set_count(void *opaque, uint64_t count)
322 ptimer_set_count(opaque, -count);
325 uint64_t cpu_tick_get_count(void *opaque)
327 return -ptimer_get_count(opaque);
330 void cpu_tick_set_limit(void *opaque, uint64_t limit)
332 ptimer_set_limit(opaque, -limit, 0);
335 static const int ide_iobase[2] = { 0x1f0, 0x170 };
336 static const int ide_iobase2[2] = { 0x3f6, 0x376 };
337 static const int ide_irq[2] = { 14, 15 };
339 static const int serial_io[MAX_SERIAL_PORTS] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8 };
340 static const int serial_irq[MAX_SERIAL_PORTS] = { 4, 3, 4, 3 };
342 static const int parallel_io[MAX_PARALLEL_PORTS] = { 0x378, 0x278, 0x3bc };
343 static const int parallel_irq[MAX_PARALLEL_PORTS] = { 7, 7, 7 };
345 static fdctrl_t *floppy_controller;
347 static void sun4uv_init(ram_addr_t RAM_size, int vga_ram_size,
348 const char *boot_devices, DisplayState *ds,
349 const char *kernel_filename, const char *kernel_cmdline,
350 const char *initrd_filename, const char *cpu_model,
351 const struct hwdef *hwdef)
353 CPUState *env;
354 char buf[1024];
355 m48t59_t *nvram;
356 int ret, linux_boot;
357 unsigned int i;
358 ram_addr_t ram_offset, prom_offset, vga_ram_offset;
359 long initrd_size, kernel_size;
360 PCIBus *pci_bus;
361 QEMUBH *bh;
362 qemu_irq *irq;
363 int drive_index;
364 BlockDriverState *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
365 BlockDriverState *fd[MAX_FD];
366 void *fw_cfg;
367 ResetData *reset_info;
369 linux_boot = (kernel_filename != NULL);
371 /* init CPUs */
372 if (!cpu_model)
373 cpu_model = hwdef->default_cpu_model;
375 env = cpu_init(cpu_model);
376 if (!env) {
377 fprintf(stderr, "Unable to find Sparc CPU definition\n");
378 exit(1);
380 bh = qemu_bh_new(tick_irq, env);
381 env->tick = ptimer_init(bh);
382 ptimer_set_period(env->tick, 1ULL);
384 bh = qemu_bh_new(stick_irq, env);
385 env->stick = ptimer_init(bh);
386 ptimer_set_period(env->stick, 1ULL);
388 bh = qemu_bh_new(hstick_irq, env);
389 env->hstick = ptimer_init(bh);
390 ptimer_set_period(env->hstick, 1ULL);
392 reset_info = qemu_mallocz(sizeof(ResetData));
393 reset_info->env = env;
394 reset_info->reset_addr = hwdef->prom_addr + 0x40ULL;
395 qemu_register_reset(main_cpu_reset, reset_info);
396 main_cpu_reset(reset_info);
397 // Override warm reset address with cold start address
398 env->pc = hwdef->prom_addr + 0x20ULL;
399 env->npc = env->pc + 4;
401 /* allocate RAM */
402 ram_offset = qemu_ram_alloc(RAM_size);
403 cpu_register_physical_memory(0, RAM_size, ram_offset);
405 prom_offset = qemu_ram_alloc(PROM_SIZE_MAX);
406 cpu_register_physical_memory(hwdef->prom_addr,
407 (PROM_SIZE_MAX + TARGET_PAGE_SIZE) &
408 TARGET_PAGE_MASK,
409 prom_offset | IO_MEM_ROM);
411 if (bios_name == NULL)
412 bios_name = PROM_FILENAME;
413 snprintf(buf, sizeof(buf), "%s/%s", bios_dir, bios_name);
414 ret = load_elf(buf, hwdef->prom_addr - PROM_VADDR, NULL, NULL, NULL);
415 if (ret < 0) {
416 ret = load_image_targphys(buf, hwdef->prom_addr,
417 (PROM_SIZE_MAX + TARGET_PAGE_SIZE) &
418 TARGET_PAGE_MASK);
419 if (ret < 0) {
420 fprintf(stderr, "qemu: could not load prom '%s'\n",
421 buf);
422 exit(1);
426 kernel_size = 0;
427 initrd_size = 0;
428 if (linux_boot) {
429 /* XXX: put correct offset */
430 kernel_size = load_elf(kernel_filename, 0, NULL, NULL, NULL);
431 if (kernel_size < 0)
432 kernel_size = load_aout(kernel_filename, KERNEL_LOAD_ADDR,
433 ram_size - KERNEL_LOAD_ADDR);
434 if (kernel_size < 0)
435 kernel_size = load_image_targphys(kernel_filename,
436 KERNEL_LOAD_ADDR,
437 ram_size - KERNEL_LOAD_ADDR);
438 if (kernel_size < 0) {
439 fprintf(stderr, "qemu: could not load kernel '%s'\n",
440 kernel_filename);
441 exit(1);
444 /* load initrd */
445 if (initrd_filename) {
446 initrd_size = load_image_targphys(initrd_filename,
447 INITRD_LOAD_ADDR,
448 ram_size - INITRD_LOAD_ADDR);
449 if (initrd_size < 0) {
450 fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
451 initrd_filename);
452 exit(1);
455 if (initrd_size > 0) {
456 for (i = 0; i < 64 * TARGET_PAGE_SIZE; i += TARGET_PAGE_SIZE) {
457 if (ldl_phys(KERNEL_LOAD_ADDR + i) == 0x48647253) { // HdrS
458 stl_phys(KERNEL_LOAD_ADDR + i + 16, INITRD_LOAD_ADDR);
459 stl_phys(KERNEL_LOAD_ADDR + i + 20, initrd_size);
460 break;
465 pci_bus = pci_apb_init(APB_SPECIAL_BASE, APB_MEM_BASE, NULL);
466 isa_mem_base = VGA_BASE;
467 vga_ram_offset = qemu_ram_alloc(vga_ram_size);
468 pci_cirrus_vga_init(pci_bus, ds, phys_ram_base + vga_ram_offset,
469 vga_ram_offset, vga_ram_size);
471 i = 0;
472 if (hwdef->console_serial_base) {
473 serial_mm_init(hwdef->console_serial_base, 0, NULL, 115200,
474 serial_hds[i], 1);
475 i++;
477 for(; i < MAX_SERIAL_PORTS; i++) {
478 if (serial_hds[i]) {
479 serial_init(serial_io[i], NULL/*serial_irq[i]*/, 115200,
480 serial_hds[i]);
484 for(i = 0; i < MAX_PARALLEL_PORTS; i++) {
485 if (parallel_hds[i]) {
486 parallel_init(parallel_io[i], NULL/*parallel_irq[i]*/,
487 parallel_hds[i]);
491 for(i = 0; i < nb_nics; i++) {
492 if (!nd_table[i].model)
493 nd_table[i].model = "ne2k_pci";
494 pci_nic_init(pci_bus, &nd_table[i], -1);
497 irq = qemu_allocate_irqs(cpu_set_irq, env, MAX_PILS);
498 if (drive_get_max_bus(IF_IDE) >= MAX_IDE_BUS) {
499 fprintf(stderr, "qemu: too many IDE bus\n");
500 exit(1);
502 for(i = 0; i < MAX_IDE_BUS * MAX_IDE_DEVS; i++) {
503 drive_index = drive_get_index(IF_IDE, i / MAX_IDE_DEVS,
504 i % MAX_IDE_DEVS);
505 if (drive_index != -1)
506 hd[i] = drives_table[drive_index].bdrv;
507 else
508 hd[i] = NULL;
511 // XXX pci_cmd646_ide_init(pci_bus, hd, 1);
512 pci_piix3_ide_init(pci_bus, hd, -1, irq);
513 /* FIXME: wire up interrupts. */
514 i8042_init(NULL/*1*/, NULL/*12*/, 0x60);
515 for(i = 0; i < MAX_FD; i++) {
516 drive_index = drive_get_index(IF_FLOPPY, 0, i);
517 if (drive_index != -1)
518 fd[i] = drives_table[drive_index].bdrv;
519 else
520 fd[i] = NULL;
522 floppy_controller = fdctrl_init(NULL/*6*/, 2, 0, 0x3f0, fd);
523 nvram = m48t59_init(NULL/*8*/, 0, 0x0074, NVRAM_SIZE, 59);
524 sun4u_NVRAM_set_params(nvram, NVRAM_SIZE, "Sun4u", RAM_size, boot_devices,
525 KERNEL_LOAD_ADDR, kernel_size,
526 kernel_cmdline,
527 INITRD_LOAD_ADDR, initrd_size,
528 /* XXX: need an option to load a NVRAM image */
530 graphic_width, graphic_height, graphic_depth,
531 (uint8_t *)&nd_table[0].macaddr);
533 fw_cfg = fw_cfg_init(BIOS_CFG_IOPORT, BIOS_CFG_IOPORT + 1, 0, 0);
534 fw_cfg_add_i32(fw_cfg, FW_CFG_ID, 1);
535 fw_cfg_add_i64(fw_cfg, FW_CFG_RAM_SIZE, (uint64_t)ram_size);
536 fw_cfg_add_i16(fw_cfg, FW_CFG_MACHINE_ID, hwdef->machine_id);
539 enum {
540 sun4u_id = 0,
541 sun4v_id = 64,
542 niagara_id,
545 static const struct hwdef hwdefs[] = {
546 /* Sun4u generic PC-like machine */
548 .default_cpu_model = "TI UltraSparc II",
549 .machine_id = sun4u_id,
550 .prom_addr = 0x1fff0000000ULL,
551 .console_serial_base = 0,
553 /* Sun4v generic PC-like machine */
555 .default_cpu_model = "Sun UltraSparc T1",
556 .machine_id = sun4v_id,
557 .prom_addr = 0x1fff0000000ULL,
558 .console_serial_base = 0,
560 /* Sun4v generic Niagara machine */
562 .default_cpu_model = "Sun UltraSparc T1",
563 .machine_id = niagara_id,
564 .prom_addr = 0xfff0000000ULL,
565 .console_serial_base = 0xfff0c2c000ULL,
569 /* Sun4u hardware initialisation */
570 static void sun4u_init(ram_addr_t RAM_size, int vga_ram_size,
571 const char *boot_devices, DisplayState *ds,
572 const char *kernel_filename, const char *kernel_cmdline,
573 const char *initrd_filename, const char *cpu_model)
575 sun4uv_init(RAM_size, vga_ram_size, boot_devices, ds, kernel_filename,
576 kernel_cmdline, initrd_filename, cpu_model, &hwdefs[0]);
579 /* Sun4v hardware initialisation */
580 static void sun4v_init(ram_addr_t RAM_size, int vga_ram_size,
581 const char *boot_devices, DisplayState *ds,
582 const char *kernel_filename, const char *kernel_cmdline,
583 const char *initrd_filename, const char *cpu_model)
585 sun4uv_init(RAM_size, vga_ram_size, boot_devices, ds, kernel_filename,
586 kernel_cmdline, initrd_filename, cpu_model, &hwdefs[1]);
589 /* Niagara hardware initialisation */
590 static void niagara_init(ram_addr_t RAM_size, int vga_ram_size,
591 const char *boot_devices, DisplayState *ds,
592 const char *kernel_filename, const char *kernel_cmdline,
593 const char *initrd_filename, const char *cpu_model)
595 sun4uv_init(RAM_size, vga_ram_size, boot_devices, ds, kernel_filename,
596 kernel_cmdline, initrd_filename, cpu_model, &hwdefs[2]);
599 QEMUMachine sun4u_machine = {
600 .name = "sun4u",
601 .desc = "Sun4u platform",
602 .init = sun4u_init,
603 .ram_require = PROM_SIZE_MAX + VGA_RAM_SIZE,
604 .nodisk_ok = 1,
605 .max_cpus = 1, // XXX for now
608 QEMUMachine sun4v_machine = {
609 .name = "sun4v",
610 .desc = "Sun4v platform",
611 .init = sun4v_init,
612 .ram_require = PROM_SIZE_MAX + VGA_RAM_SIZE,
613 .nodisk_ok = 1,
614 .max_cpus = 1, // XXX for now
617 QEMUMachine niagara_machine = {
618 .name = "Niagara",
619 .desc = "Sun4v platform, Niagara",
620 .init = niagara_init,
621 .ram_require = PROM_SIZE_MAX + VGA_RAM_SIZE,
622 .nodisk_ok = 1,
623 .max_cpus = 1, // XXX for now