[mirror_qemu.git] / hw / pc.c

/*
 * QEMU PC System Emulator
 * 
 * Copyright (c) 2003-2004 Fabrice Bellard
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <getopt.h>
#include <inttypes.h>
#include <unistd.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <signal.h>
#include <time.h>
#include <sys/time.h>
#include <malloc.h>
#include <termios.h>
#include <sys/poll.h>
#include <errno.h>
#include <sys/wait.h>
#include <netinet/in.h>

#include "cpu.h"
#include "vl.h"

#define BIOS_FILENAME "bios.bin"
#define VGABIOS_FILENAME "vgabios.bin"
#define LINUX_BOOT_FILENAME "linux_boot.bin"

#define KERNEL_LOAD_ADDR     0x00100000
#define INITRD_LOAD_ADDR     0x00400000
#define KERNEL_PARAMS_ADDR   0x00090000
#define KERNEL_CMDLINE_ADDR  0x00099000

int speaker_data_on;
int dummy_refresh_clock;

static void ioport80_write(CPUState *env, uint32_t addr, uint32_t data)
{
}

#define REG_EQUIPMENT_BYTE          0x14

static void cmos_init(int ram_size, int boot_device)
{
    RTCState *s = &rtc_state;
    int val;
    
    /* various important CMOS locations needed by PC/Bochs bios */

    s->cmos_data[REG_EQUIPMENT_BYTE] = 0x02; /* FPU is there */
    s->cmos_data[REG_EQUIPMENT_BYTE] |= 0x04; /* PS/2 mouse installed */

    /* memory size */
    val = (ram_size / 1024) - 1024;
    if (val > 65535)
        val = 65535;
    s->cmos_data[0x17] = val;
    s->cmos_data[0x18] = val >> 8;
    s->cmos_data[0x30] = val;
    s->cmos_data[0x31] = val >> 8;

    val = (ram_size / 65536) - ((16 * 1024 * 1024) / 65536);
    if (val > 65535)
        val = 65535;
    s->cmos_data[0x34] = val;
    s->cmos_data[0x35] = val >> 8;
    
    switch(boot_device) {
    case 'a':
    case 'b':
        s->cmos_data[0x3d] = 0x01; /* floppy boot */
        break;
    default:
    case 'c':
        s->cmos_data[0x3d] = 0x02; /* hard drive boot */
        break;
    case 'd':
        s->cmos_data[0x3d] = 0x03; /* CD-ROM boot */
        break;
    }
}

void cmos_register_fd (uint8_t fd0, uint8_t fd1)
{
    RTCState *s = &rtc_state;
    int nb = 0;

    s->cmos_data[0x10] = 0;
    switch (fd0) {
    case 0:
        /* 1.44 Mb 3"5 drive */
        s->cmos_data[0x10] |= 0x40;
        break;
    case 1:
        /* 2.88 Mb 3"5 drive */
        s->cmos_data[0x10] |= 0x60;
        break;
    case 2:
        /* 1.2 Mb 5"5 drive */
        s->cmos_data[0x10] |= 0x20;
        break;
    }
    switch (fd1) {
    case 0:
        /* 1.44 Mb 3"5 drive */
        s->cmos_data[0x10] |= 0x04;
        break;
    case 1:
        /* 2.88 Mb 3"5 drive */
        s->cmos_data[0x10] |= 0x06;
        break;
    case 2:
        /* 1.2 Mb 5"5 drive */
        s->cmos_data[0x10] |= 0x02;
        break;
    }
    if (fd0 < 3)
        nb++;
    if (fd1 < 3)
        nb++;
    switch (nb) {
    case 0:
        break;
    case 1:
        s->cmos_data[REG_EQUIPMENT_BYTE] |= 0x01; /* 1 drive, ready for boot */
        break;
    case 2:
        s->cmos_data[REG_EQUIPMENT_BYTE] |= 0x41; /* 2 drives, ready for boot */
        break;
    }
}

void speaker_ioport_write(CPUState *env, uint32_t addr, uint32_t val)
{
    speaker_data_on = (val >> 1) & 1;
    pit_set_gate(&pit_channels[2], val & 1);
}

uint32_t speaker_ioport_read(CPUState *env, uint32_t addr)
{
    int out;
    out = pit_get_out(&pit_channels[2]);
    dummy_refresh_clock ^= 1;
    return (speaker_data_on << 1) | pit_channels[2].gate | (out << 5) |
      (dummy_refresh_clock << 4);
}

/***********************************************************/
/* PC floppy disk controler emulation glue */
#define PC_FDC_DMA  0x2
#define PC_FDC_IRQ  0x6
#define PC_FDC_BASE 0x3F0

static void fdctrl_register (unsigned char **disknames, int ro,
                             char boot_device)
{
    int i;

    fdctrl_init(PC_FDC_IRQ, PC_FDC_DMA, 0, PC_FDC_BASE, boot_device);
    for (i = 0; i < MAX_FD; i++) {
        if (disknames[i] != NULL)
            fdctrl_disk_change(i, disknames[i], ro);
    }
}

/***********************************************************/
/* Bochs BIOS debug ports */

void bochs_bios_write(CPUX86State *env, uint32_t addr, uint32_t val)
{
    switch(addr) {
        /* Bochs BIOS messages */
    case 0x400:
    case 0x401:
        fprintf(stderr, "BIOS panic at rombios.c, line %d\n", val);
        exit(1);
    case 0x402:
    case 0x403:
#ifdef DEBUG_BIOS
        fprintf(stderr, "%c", val);
#endif
        break;

        /* LGPL'ed VGA BIOS messages */
    case 0x501:
    case 0x502:
        fprintf(stderr, "VGA BIOS panic, line %d\n", val);
        exit(1);
    case 0x500:
    case 0x503:
#ifdef DEBUG_BIOS
        fprintf(stderr, "%c", val);
#endif
        break;
    }
}

void bochs_bios_init(void)
{
    register_ioport_write(0x400, 1, bochs_bios_write, 2);
    register_ioport_write(0x401, 1, bochs_bios_write, 2);
    register_ioport_write(0x402, 1, bochs_bios_write, 1);
    register_ioport_write(0x403, 1, bochs_bios_write, 1);

    register_ioport_write(0x501, 1, bochs_bios_write, 2);
    register_ioport_write(0x502, 1, bochs_bios_write, 2);
    register_ioport_write(0x500, 1, bochs_bios_write, 1);
    register_ioport_write(0x503, 1, bochs_bios_write, 1);
}


int load_kernel(const char *filename, uint8_t *addr, 
                uint8_t *real_addr)
{
    int fd, size;
    int setup_sects;

    fd = open(filename, O_RDONLY);
    if (fd < 0)
        return -1;

    /* load 16 bit code */
    if (read(fd, real_addr, 512) != 512)
        goto fail;
    setup_sects = real_addr[0x1F1];
    if (!setup_sects)
        setup_sects = 4;
    if (read(fd, real_addr + 512, setup_sects * 512) != 
        setup_sects * 512)
        goto fail;
    
    /* load 32 bit code */
    size = read(fd, addr, 16 * 1024 * 1024);
    if (size < 0)
        goto fail;
    close(fd);
    return size;
 fail:
    close(fd);
    return -1;
}

/* PC hardware initialisation */
void pc_init(int ram_size, int vga_ram_size, int boot_device,
             DisplayState *ds, const char **fd_filename, int snapshot,
             const char *kernel_filename, const char *kernel_cmdline,
             const char *initrd_filename)
{
    char buf[1024];
    int ret, linux_boot, initrd_size;

    linux_boot = (kernel_filename != NULL);

    /* allocate RAM */
    cpu_register_physical_memory(0, ram_size, 0);

    /* BIOS load */
    snprintf(buf, sizeof(buf), "%s/%s", bios_dir, BIOS_FILENAME);
    ret = load_image(buf, phys_ram_base + 0x000f0000);
    if (ret != 0x10000) {
        fprintf(stderr, "qemu: could not load PC bios '%s'\n", buf);
        exit(1);
    }
    
    /* VGA BIOS load */
    snprintf(buf, sizeof(buf), "%s/%s", bios_dir, VGABIOS_FILENAME);
    ret = load_image(buf, phys_ram_base + 0x000c0000);
    
    /* setup basic memory access */
    cpu_register_physical_memory(0xc0000, 0x10000, 0xc0000 | IO_MEM_ROM);
    cpu_register_physical_memory(0xf0000, 0x10000, 0xf0000 | IO_MEM_ROM);
    
    bochs_bios_init();

    if (linux_boot) {
        uint8_t bootsect[512];

        if (bs_table[0] == NULL) {
            fprintf(stderr, "A disk image must be given for 'hda' when booting a Linux kernel\n");
            exit(1);
        }
        snprintf(buf, sizeof(buf), "%s/%s", bios_dir, LINUX_BOOT_FILENAME);
        ret = load_image(buf, bootsect);
        if (ret != sizeof(bootsect)) {
            fprintf(stderr, "qemu: could not load linux boot sector '%s'\n",
                    buf);
            exit(1);
        }

        bdrv_set_boot_sector(bs_table[0], bootsect, sizeof(bootsect));

        /* now we can load the kernel */
        ret = load_kernel(kernel_filename, 
                          phys_ram_base + KERNEL_LOAD_ADDR,
                          phys_ram_base + KERNEL_PARAMS_ADDR);
        if (ret < 0) {
            fprintf(stderr, "qemu: could not load kernel '%s'\n", 
                    kernel_filename);
            exit(1);
        }
        
        /* load initrd */
        initrd_size = 0;
        if (initrd_filename) {
            initrd_size = load_image(initrd_filename, phys_ram_base + INITRD_LOAD_ADDR);
            if (initrd_size < 0) {
                fprintf(stderr, "qemu: could not load initial ram disk '%s'\n", 
                        initrd_filename);
                exit(1);
            }
        }
        if (initrd_size > 0) {
            stl_raw(phys_ram_base + KERNEL_PARAMS_ADDR + 0x218, INITRD_LOAD_ADDR);
            stl_raw(phys_ram_base + KERNEL_PARAMS_ADDR + 0x21c, initrd_size);
        }
        pstrcpy(phys_ram_base + KERNEL_CMDLINE_ADDR, 4096,
                kernel_cmdline);
        stw_raw(phys_ram_base + KERNEL_PARAMS_ADDR + 0x20, 0xA33F);
        stw_raw(phys_ram_base + KERNEL_PARAMS_ADDR + 0x22,
                KERNEL_CMDLINE_ADDR - KERNEL_PARAMS_ADDR);
        /* loader type */
        stw_raw(phys_ram_base + KERNEL_PARAMS_ADDR + 0x210, 0x01);
    }

    /* init basic PC hardware */
    register_ioport_write(0x80, 1, ioport80_write, 1);

    vga_initialize(ds, phys_ram_base + ram_size, ram_size, 
                   vga_ram_size);

    rtc_init(0x70, 8);
    cmos_init(ram_size, boot_device);
    register_ioport_read(0x61, 1, speaker_ioport_read, 1);
    register_ioport_write(0x61, 1, speaker_ioport_write, 1);

    pic_init();
    pit_init();
    serial_init(0x3f8, 4);
    ne2000_init(0x300, 9);
    ide_init();
    kbd_init();
    AUD_init();
    DMA_init();
    SB16_init();

    fdctrl_register((unsigned char **)fd_filename, snapshot, boot_device);
}
Commit	Line	Data
80cabfad FB	1	/*
	2	* QEMU PC System Emulator
	3	*
	4	* Copyright (c) 2003-2004 Fabrice Bellard
	5	*
	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:
	12	*
	13	* The above copyright notice and this permission notice shall be included in
	14	* all copies or substantial portions of the Software.
	15	*
	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.
	23	*/
	24	#include <stdlib.h>
	25	#include <stdio.h>
	26	#include <stdarg.h>
	27	#include <string.h>
	28	#include <getopt.h>
	29	#include <inttypes.h>
	30	#include <unistd.h>
	31	#include <sys/mman.h>
	32	#include <fcntl.h>
	33	#include <signal.h>
	34	#include <time.h>
	35	#include <sys/time.h>
	36	#include <malloc.h>
	37	#include <termios.h>
	38	#include <sys/poll.h>
	39	#include <errno.h>
	40	#include <sys/wait.h>
	41	#include <netinet/in.h>
	42
	43	#include "cpu.h"
	44	#include "vl.h"
	45
	46	#define BIOS_FILENAME "bios.bin"
	47	#define VGABIOS_FILENAME "vgabios.bin"
	48	#define LINUX_BOOT_FILENAME "linux_boot.bin"
	49
	50	#define KERNEL_LOAD_ADDR 0x00100000
	51	#define INITRD_LOAD_ADDR 0x00400000
	52	#define KERNEL_PARAMS_ADDR 0x00090000
	53	#define KERNEL_CMDLINE_ADDR 0x00099000
	54
	55	int speaker_data_on;
	56	int dummy_refresh_clock;
	57
	58	static void ioport80_write(CPUState *env, uint32_t addr, uint32_t data)
	59	{
	60	}
	61
	62	#define REG_EQUIPMENT_BYTE 0x14
	63
	64	static void cmos_init(int ram_size, int boot_device)
65	{
66	RTCState *s = &rtc_state;
67	int val;
68
69	/* various important CMOS locations needed by PC/Bochs bios */
70
71	s->cmos_data[REG_EQUIPMENT_BYTE] = 0x02; /* FPU is there */
72	s->cmos_data[REG_EQUIPMENT_BYTE] \|= 0x04; /* PS/2 mouse installed */
73
74	/* memory size */
75	val = (ram_size / 1024) - 1024;
76	if (val > 65535)
77	val = 65535;
78	s->cmos_data[0x17] = val;
79	s->cmos_data[0x18] = val >> 8;
80	s->cmos_data[0x30] = val;
81	s->cmos_data[0x31] = val >> 8;
82
83	val = (ram_size / 65536) - ((16 * 1024 * 1024) / 65536);
84	if (val > 65535)
85	val = 65535;
86	s->cmos_data[0x34] = val;
87	s->cmos_data[0x35] = val >> 8;
88
89	switch(boot_device) {
90	case 'a':
91	case 'b':
92	s->cmos_data[0x3d] = 0x01; /* floppy boot */
93	break;
94	default:
95	case 'c':
96	s->cmos_data[0x3d] = 0x02; /* hard drive boot */
97	break;
98	case 'd':
99	s->cmos_data[0x3d] = 0x03; /* CD-ROM boot */
100	break;
101	}
102	}
103
104	void cmos_register_fd (uint8_t fd0, uint8_t fd1)
105	{
106	RTCState *s = &rtc_state;
107	int nb = 0;
108
109	s->cmos_data[0x10] = 0;
110	switch (fd0) {
111	case 0:
112	/* 1.44 Mb 3"5 drive */
113	s->cmos_data[0x10] \|= 0x40;
114	break;
115	case 1:
116	/* 2.88 Mb 3"5 drive */
117	s->cmos_data[0x10] \|= 0x60;
118	break;
119	case 2:
120	/* 1.2 Mb 5"5 drive */
121	s->cmos_data[0x10] \|= 0x20;
122	break;
123	}
124	switch (fd1) {
125	case 0:
126	/* 1.44 Mb 3"5 drive */
127	s->cmos_data[0x10] \|= 0x04;
128	break;
129	case 1:
130	/* 2.88 Mb 3"5 drive */
131	s->cmos_data[0x10] \|= 0x06;
132	break;
133	case 2:
134	/* 1.2 Mb 5"5 drive */
135	s->cmos_data[0x10] \|= 0x02;
136	break;
137	}
138	if (fd0 < 3)
139	nb++;
140	if (fd1 < 3)
141	nb++;
142	switch (nb) {
143	case 0:
144	break;
145	case 1:
146	s->cmos_data[REG_EQUIPMENT_BYTE] \|= 0x01; /* 1 drive, ready for boot */
147	break;
148	case 2:
149	s->cmos_data[REG_EQUIPMENT_BYTE] \|= 0x41; /* 2 drives, ready for boot */
150	break;
151	}
152	}
153
154	void speaker_ioport_write(CPUState *env, uint32_t addr, uint32_t val)
155	{
156	speaker_data_on = (val >> 1) & 1;
157	pit_set_gate(&pit_channels[2], val & 1);
158	}
159
160	uint32_t speaker_ioport_read(CPUState *env, uint32_t addr)
161	{
162	int out;
163	out = pit_get_out(&pit_channels[2]);
164	dummy_refresh_clock ^= 1;
165	return (speaker_data_on << 1) \| pit_channels[2].gate \| (out << 5) \|
166	(dummy_refresh_clock << 4);
167	}
168
169	/***********************************************************/
170	/* PC floppy disk controler emulation glue */
171	#define PC_FDC_DMA 0x2
172	#define PC_FDC_IRQ 0x6
173	#define PC_FDC_BASE 0x3F0
174
175	static void fdctrl_register (unsigned char **disknames, int ro,
176	char boot_device)
177	{
178	int i;
179
180	fdctrl_init(PC_FDC_IRQ, PC_FDC_DMA, 0, PC_FDC_BASE, boot_device);
181	for (i = 0; i < MAX_FD; i++) {
182	if (disknames[i] != NULL)
183	fdctrl_disk_change(i, disknames[i], ro);
184	}
185	}
186
187	/***********************************************************/
188	/* Bochs BIOS debug ports */
189
190	void bochs_bios_write(CPUX86State *env, uint32_t addr, uint32_t val)
191	{
192	switch(addr) {
193	/* Bochs BIOS messages */
194	case 0x400:
195	case 0x401:
196	fprintf(stderr, "BIOS panic at rombios.c, line %d\n", val);
197	exit(1);
198	case 0x402:
199	case 0x403:
200	#ifdef DEBUG_BIOS
201	fprintf(stderr, "%c", val);
202	#endif
203	break;
204
205	/* LGPL'ed VGA BIOS messages */
206	case 0x501:
207	case 0x502:
208	fprintf(stderr, "VGA BIOS panic, line %d\n", val);
209	exit(1);
210	case 0x500:
211	case 0x503:
212	#ifdef DEBUG_BIOS
213	fprintf(stderr, "%c", val);
214	#endif
215	break;
216	}
217	}
218
219	void bochs_bios_init(void)
220	{
221	register_ioport_write(0x400, 1, bochs_bios_write, 2);
222	register_ioport_write(0x401, 1, bochs_bios_write, 2);
223	register_ioport_write(0x402, 1, bochs_bios_write, 1);
224	register_ioport_write(0x403, 1, bochs_bios_write, 1);
225
226	register_ioport_write(0x501, 1, bochs_bios_write, 2);
227	register_ioport_write(0x502, 1, bochs_bios_write, 2);
228	register_ioport_write(0x500, 1, bochs_bios_write, 1);
229	register_ioport_write(0x503, 1, bochs_bios_write, 1);
230	}
231
232
233	int load_kernel(const char filename, uint8_t addr,
234	uint8_t *real_addr)
235	{
236	int fd, size;
237	int setup_sects;
238
239	fd = open(filename, O_RDONLY);
240	if (fd < 0)
241	return -1;
242
243	/* load 16 bit code */
244	if (read(fd, real_addr, 512) != 512)
245	goto fail;
246	setup_sects = real_addr[0x1F1];
247	if (!setup_sects)
248	setup_sects = 4;
249	if (read(fd, real_addr + 512, setup_sects * 512) !=
250	setup_sects * 512)
251	goto fail;
252
253	/* load 32 bit code */
254	size = read(fd, addr, 16 * 1024 * 1024);
255	if (size < 0)
256	goto fail;
257	close(fd);
258	return size;
259	fail:
260	close(fd);
261	return -1;
262	}
263
264	/* PC hardware initialisation */
265	void pc_init(int ram_size, int vga_ram_size, int boot_device,
266	DisplayState ds, const char *fd_filename, int snapshot,
267	const char kernel_filename, const char kernel_cmdline,
268	const char *initrd_filename)
269	{
270	char buf[1024];
271	int ret, linux_boot, initrd_size;
272
273	linux_boot = (kernel_filename != NULL);
274
275	/* allocate RAM */
276	cpu_register_physical_memory(0, ram_size, 0);
277
278	/* BIOS load */
279	snprintf(buf, sizeof(buf), "%s/%s", bios_dir, BIOS_FILENAME);
280	ret = load_image(buf, phys_ram_base + 0x000f0000);
281	if (ret != 0x10000) {
282	fprintf(stderr, "qemu: could not load PC bios '%s'\n", buf);
283	exit(1);
284	}
285
286	/* VGA BIOS load */
287	snprintf(buf, sizeof(buf), "%s/%s", bios_dir, VGABIOS_FILENAME);
288	ret = load_image(buf, phys_ram_base + 0x000c0000);
289
290	/* setup basic memory access */
291	cpu_register_physical_memory(0xc0000, 0x10000, 0xc0000 \| IO_MEM_ROM);
292	cpu_register_physical_memory(0xf0000, 0x10000, 0xf0000 \| IO_MEM_ROM);
293
294	bochs_bios_init();
295
296	if (linux_boot) {
297	uint8_t bootsect[512];
298
299	if (bs_table[0] == NULL) {
300	fprintf(stderr, "A disk image must be given for 'hda' when booting a Linux kernel\n");
301	exit(1);
302	}
303	snprintf(buf, sizeof(buf), "%s/%s", bios_dir, LINUX_BOOT_FILENAME);
304	ret = load_image(buf, bootsect);
305	if (ret != sizeof(bootsect)) {
306	fprintf(stderr, "qemu: could not load linux boot sector '%s'\n",
307	buf);
308	exit(1);
309	}
310
311	bdrv_set_boot_sector(bs_table[0], bootsect, sizeof(bootsect));
312
313	/* now we can load the kernel */
314	ret = load_kernel(kernel_filename,
315	phys_ram_base + KERNEL_LOAD_ADDR,
316	phys_ram_base + KERNEL_PARAMS_ADDR);
317	if (ret < 0) {
318	fprintf(stderr, "qemu: could not load kernel '%s'\n",
319	kernel_filename);
320	exit(1);
321	}
322
323	/* load initrd */
324	initrd_size = 0;
325	if (initrd_filename) {
326	initrd_size = load_image(initrd_filename, phys_ram_base + INITRD_LOAD_ADDR);
327	if (initrd_size < 0) {
328	fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
329	initrd_filename);
330	exit(1);
331	}
332	}
333	if (initrd_size > 0) {
334	stl_raw(phys_ram_base + KERNEL_PARAMS_ADDR + 0x218, INITRD_LOAD_ADDR);
335	stl_raw(phys_ram_base + KERNEL_PARAMS_ADDR + 0x21c, initrd_size);
336	}
337	pstrcpy(phys_ram_base + KERNEL_CMDLINE_ADDR, 4096,
338	kernel_cmdline);
339	stw_raw(phys_ram_base + KERNEL_PARAMS_ADDR + 0x20, 0xA33F);
340	stw_raw(phys_ram_base + KERNEL_PARAMS_ADDR + 0x22,
341	KERNEL_CMDLINE_ADDR - KERNEL_PARAMS_ADDR);
342	/* loader type */
343	stw_raw(phys_ram_base + KERNEL_PARAMS_ADDR + 0x210, 0x01);
344	}
345
346	/* init basic PC hardware */
347	register_ioport_write(0x80, 1, ioport80_write, 1);
348
349	vga_initialize(ds, phys_ram_base + ram_size, ram_size,
350	vga_ram_size);
351
352	rtc_init(0x70, 8);
353	cmos_init(ram_size, boot_device);
354	register_ioport_read(0x61, 1, speaker_ioport_read, 1);
355	register_ioport_write(0x61, 1, speaker_ioport_write, 1);
356
357	pic_init();
358	pit_init();
359	serial_init(0x3f8, 4);
360	ne2000_init(0x300, 9);
361	ide_init();
362	kbd_init();
363	AUD_init();
364	DMA_init();
365	SB16_init();
366
367	fdctrl_register((unsigned char **)fd_filename, snapshot, boot_device);
368	}