[megadrive.git] / megaed-stop / main.c

/*
 * This software is released into the public domain.
 * See UNLICENSE file in top level directory.
 */
#include <stdlib.h>
#include <stdarg.h>

#define u8      unsigned char
#define u16     unsigned short
#define u32     unsigned int

#include "edos.h"

#define GFX_DATA_PORT    0xC00000
#define GFX_CTRL_PORT    0xC00004

#define TILE_MEM_END     0xB000

#define FONT_LEN         128
#define TILE_FONT_BASE   (TILE_MEM_END / 32  - FONT_LEN)

/* note: using ED menu's layout here.. */
#define WPLANE           (TILE_MEM_END + 0x0000)
#define HSCRL            (TILE_MEM_END + 0x0800)
#define SLIST            (TILE_MEM_END + 0x0C00)
#define APLANE           (TILE_MEM_END + 0x1000)
#define BPLANE           (TILE_MEM_END + 0x3000)

#define read8(a) \
    *((volatile u8 *) (a))
#define read16(a) \
    *((volatile u16 *) (a))
#define read32(a) \
    *((volatile u32 *) (a))
#define write16(a, d) \
    *((volatile u16 *) (a)) = (d)
#define write32(a, d) \
    *((volatile u32 *) (a)) = (d)

#define GFX_WRITE_VRAM_ADDR(adr) \
    (((0x4000 | ((adr) & 0x3FFF)) << 16) | ((adr) >> 14) | 0x00)
#define GFX_WRITE_VSRAM_ADDR(adr) \
    (((0x4000 | ((adr) & 0x3FFF)) << 16) | ((adr) >> 14) | 0x10)

enum {
    VDP_MODE1 = 0x00,
    VDP_MODE2 = 0x01,
    VDP_BACKDROP = 0x07,
    VDP_MODE3 = 0x0b,
    VDP_MODE4 = 0x0c,
    VDP_AUTOINC = 0x0f,
    VDP_SCROLLSZ = 0x10,
};

/* cell counts */
#define LEFT_BORDER 1   /* lame TV */
#define PLANE_W 64
#define PLANE_H 32
#define CSCREEN_H 28

static void VDP_drawTextML(const char *str, u16 plane_base,
    u16 x, u16 y)
{
    const u8 *src = (const u8 *)str;
    u16 basetile = 0;
    int max_len = 40 - LEFT_BORDER;
    int len;
    u32 addr;

    x += LEFT_BORDER;

    for (len = 0; str[len] && len < max_len; len++)
        ;
    if (len > (PLANE_W - x))
        len = PLANE_W - x;

    addr = plane_base + ((x + (PLANE_W * y)) << 1);
    write32(GFX_CTRL_PORT, GFX_WRITE_VRAM_ADDR(addr));

    while (len-- > 0) {
        write16(GFX_DATA_PORT,
            basetile | ((*src++) - 32 + TILE_FONT_BASE / 32));
    }
}

static int printf_ypos;

static void printf_line(int x, const char *buf)
{
    u32 addr;
    int i;

    VDP_drawTextML(buf, APLANE, x, printf_ypos++ & (PLANE_H - 1));

    if (printf_ypos >= CSCREEN_H) {
        /* clear next line */
        addr = APLANE;
        addr += (PLANE_W * (printf_ypos & (PLANE_H - 1))) << 1;
        write32(GFX_CTRL_PORT, GFX_WRITE_VRAM_ADDR(addr));
        for (i = 0; i < 40 / 2; i++)
            write32(GFX_DATA_PORT, 0);

        /* scroll plane */
        write32(GFX_CTRL_PORT, GFX_WRITE_VSRAM_ADDR(0));
        write16(GFX_DATA_PORT, (printf_ypos - CSCREEN_H + 1) * 8);
    }
}

#define PRINTF_LEN 40

static int printf(const char *fmt, ...)
{
    static const char hexchars[] = "0123456789abcdef";
    static int printf_xpos;
    char c, buf[PRINTF_LEN + 11 + 1];
    const char *s;
    va_list ap;
    int ival;
    u32 uval;
    int d = 0;
    int i, j;

    va_start(ap, fmt);
    for (d = 0; *fmt; ) {
        int prefix0 = 0;
        int fwidth = 0;

        c = *fmt++;
        if (d < PRINTF_LEN)
            buf[d] = c;

        if (c != '%') {
            if (c == '\n') {
                buf[d] = 0;
                printf_line(printf_xpos, buf);
                d = 0;
                printf_xpos = 0;
                continue;
            }
            d++;
            continue;
        }
        if (d >= PRINTF_LEN)
            continue;

        if (*fmt == '0') {
            prefix0 = 1;
            fmt++;
        }

        while ('1' <= *fmt && *fmt <= '9') {
            fwidth = fwidth * 10 + *fmt - '0';
            fmt++;
        }

        switch (*fmt++) {
        case '%':
            d++;
            break;
        case 'd':
        case 'i':
            ival = va_arg(ap, int);
            if (ival < 0) {
                buf[d++] = '-';
                ival = -ival;
            }
            for (i = 1000000000; i >= 10; i /= 10)
                if (ival >= i)
                    break;
            for (; i >= 10; i /= 10) {
                buf[d++] = '0' + ival / i;
                ival %= i;
            }
            buf[d++] = '0' + ival;
            break;
        case 'x':
            uval = va_arg(ap, int);
            while (fwidth > 1 && uval < (1 << (fwidth - 1) * 4)) {
                buf[d++] = prefix0 ? '0' : ' ';
                fwidth--;
            }
            for (j = 1; j < 8 && uval >= (1 << j * 4); j++)
                ;
            for (j--; j >= 0; j--)
                buf[d++] = hexchars[(uval >> j * 4) & 0x0f];
            break;
        case 's':
            s = va_arg(ap, char *);
            while (*s && d < PRINTF_LEN)
                buf[d++] = *s++;
            break;
        default:
            // don't handle, for now
            d++;
            va_arg(ap, void *);
            break;
        }
    }
    buf[d] = 0;
    va_end(ap);

    if (d != 0) {
        // line without \n
        VDP_drawTextML(buf, APLANE, printf_xpos,
            printf_ypos & (PLANE_H - 1));
        printf_xpos += d;
    }

    return d; // wrong..
}

int main()
{
    OsRoutine *ed;
    u8 seed, bad = 0;
    u8 *p, val;
    int i, t, len;

    ed = (OsRoutine *) *(u32 *)0x1A0;
    ed->memInitDmaCode(); 

    ed->VDP_setReg(VDP_MODE1, 0x04); 
    ed->VDP_setReg(VDP_MODE2, 0x64); 
    ed->VDP_setReg(VDP_AUTOINC, 2); 
    ed->VDP_setReg(VDP_SCROLLSZ, 0x01); 

    /* clear name tables */
    write32(GFX_CTRL_PORT, GFX_WRITE_VRAM_ADDR(APLANE));
    for (i = 0; i < PLANE_W * PLANE_H / 2; i++)
        write32(GFX_DATA_PORT, 0);

    write32(GFX_CTRL_PORT, GFX_WRITE_VRAM_ADDR(BPLANE));
    for (i = 0; i < PLANE_W * PLANE_H / 2; i++)
        write32(GFX_DATA_PORT, 0);

    /* scroll planes */
    write32(GFX_CTRL_PORT, GFX_WRITE_VSRAM_ADDR(0));
    write32(GFX_DATA_PORT, 0);

    /* note: relying on ED menu's font setup here.. */

    printf("\n");
    printf("MD version: %02x\n", read8(0xa10001));
    printf("ED os/fw: %d/%d\n\n", ed->osGetOsVersion(),
           ed->osGetFirmVersion());

    seed = read8(0xC00009);
    p = (void *)0x200000;
    len = 0x200000;
    printf("filling SDRAM, seed=%02x.. ", seed);

    val = seed;
    for (i = 0; i < len; i++)
        p[i] = val++;

    printf("done.\n");

    for (t = 1; ; t++) {
        printf("executing stop.. ");
        for (i = 0; i < 5 * 60; i++)
            asm volatile("stop #0x2000");
        printf("done\n");

        printf("checking memory..\n");

        val = seed;
        for (i = 0; i < len; i++) {
            if (p[i] != val) {
                printf("bad: %06x: got %02x, expected %02x\n",
                       &p[i], p[i], val);
                bad = 1;
            }
            val++;
        }

        printf("done. Try %d: test ", t);
        if (bad) {
            printf("FAILED\n");
            break;
        }
        printf("PASSED\n");
    }

    /* there are not enough STOP opcodes in this world :D */
    while (1)
        asm volatile("stop #0x2000");

    return 0;
}

// vim:ts=4:sw=4:expandtab
Commit	Line	Data
d2bfad8a	1	/*
	2	* This software is released into the public domain.
	3	* See UNLICENSE file in top level directory.
	4	*/
	5	#include <stdlib.h>
	6	#include <stdarg.h>
	7
	8	#define u8 unsigned char
	9	#define u16 unsigned short
	10	#define u32 unsigned int
	11
	12	#include "edos.h"
	13
	14	#define GFX_DATA_PORT 0xC00000
	15	#define GFX_CTRL_PORT 0xC00004
	16
	17	#define TILE_MEM_END 0xB000
	18
	19	#define FONT_LEN 128
	20	#define TILE_FONT_BASE (TILE_MEM_END / 32 - FONT_LEN)
	21
	22	/* note: using ED menu's layout here.. */
	23	#define WPLANE (TILE_MEM_END + 0x0000)
	24	#define HSCRL (TILE_MEM_END + 0x0800)
	25	#define SLIST (TILE_MEM_END + 0x0C00)
	26	#define APLANE (TILE_MEM_END + 0x1000)
	27	#define BPLANE (TILE_MEM_END + 0x3000)
	28
	29	#define read8(a) \
	30	((volatile u8 ) (a))
	31	#define read16(a) \
	32	((volatile u16 ) (a))
	33	#define read32(a) \
	34	((volatile u32 ) (a))
	35	#define write16(a, d) \
	36	((volatile u16 ) (a)) = (d)
	37	#define write32(a, d) \
	38	((volatile u32 ) (a)) = (d)
	39
	40	#define GFX_WRITE_VRAM_ADDR(adr) \
	41	(((0x4000 \| ((adr) & 0x3FFF)) << 16) \| ((adr) >> 14) \| 0x00)
	42	#define GFX_WRITE_VSRAM_ADDR(adr) \
	43	(((0x4000 \| ((adr) & 0x3FFF)) << 16) \| ((adr) >> 14) \| 0x10)
	44
	45	enum {
	46	VDP_MODE1 = 0x00,
	47	VDP_MODE2 = 0x01,
	48	VDP_BACKDROP = 0x07,
	49	VDP_MODE3 = 0x0b,
	50	VDP_MODE4 = 0x0c,
	51	VDP_AUTOINC = 0x0f,
	52	VDP_SCROLLSZ = 0x10,
	53	};
	54
	55	/* cell counts */
	56	#define LEFT_BORDER 1 /* lame TV */
	57	#define PLANE_W 64
	58	#define PLANE_H 32
	59	#define CSCREEN_H 28
	60
	61	static void VDP_drawTextML(const char *str, u16 plane_base,
	62	u16 x, u16 y)
	63	{
	64	const u8 src = (const u8 )str;
65	u16 basetile = 0;
66	int max_len = 40 - LEFT_BORDER;
67	int len;
68	u32 addr;
69
70	x += LEFT_BORDER;
71
72	for (len = 0; str[len] && len < max_len; len++)
73	;
74	if (len > (PLANE_W - x))
75	len = PLANE_W - x;
76
77	addr = plane_base + ((x + (PLANE_W * y)) << 1);
78	write32(GFX_CTRL_PORT, GFX_WRITE_VRAM_ADDR(addr));
79
80	while (len-- > 0) {
81	write16(GFX_DATA_PORT,
3ee911dc	82	basetile \| ((*src++) - 32 + TILE_FONT_BASE / 32));
d2bfad8a	83	}
	84	}
	85
	86	static int printf_ypos;
	87
	88	static void printf_line(int x, const char *buf)
	89	{
	90	u32 addr;
	91	int i;
	92
	93	VDP_drawTextML(buf, APLANE, x, printf_ypos++ & (PLANE_H - 1));
	94
	95	if (printf_ypos >= CSCREEN_H) {
	96	/* clear next line */
	97	addr = APLANE;
	98	addr += (PLANE_W * (printf_ypos & (PLANE_H - 1))) << 1;
	99	write32(GFX_CTRL_PORT, GFX_WRITE_VRAM_ADDR(addr));
	100	for (i = 0; i < 40 / 2; i++)
	101	write32(GFX_DATA_PORT, 0);
	102
	103	/* scroll plane */
	104	write32(GFX_CTRL_PORT, GFX_WRITE_VSRAM_ADDR(0));
	105	write16(GFX_DATA_PORT, (printf_ypos - CSCREEN_H + 1) * 8);
	106	}
	107	}
	108
	109	#define PRINTF_LEN 40
	110
	111	static int printf(const char *fmt, ...)
	112	{
	113	static const char hexchars[] = "0123456789abcdef";
	114	static int printf_xpos;
	115	char c, buf[PRINTF_LEN + 11 + 1];
	116	const char *s;
	117	va_list ap;
	118	int ival;
	119	u32 uval;
	120	int d = 0;
	121	int i, j;
	122
	123	va_start(ap, fmt);
	124	for (d = 0; *fmt; ) {
	125	int prefix0 = 0;
	126	int fwidth = 0;
	127
	128	c = *fmt++;
	129	if (d < PRINTF_LEN)
	130	buf[d] = c;
	131
	132	if (c != '%') {
	133	if (c == '\n') {
	134	buf[d] = 0;
	135	printf_line(printf_xpos, buf);
	136	d = 0;
	137	printf_xpos = 0;
	138	continue;
	139	}
	140	d++;
	141	continue;
	142	}
	143	if (d >= PRINTF_LEN)
	144	continue;
	145
	146	if (*fmt == '0') {
147	prefix0 = 1;
148	fmt++;
149	}
150
151	while ('1' <= fmt && fmt <= '9') {
152	fwidth = fwidth * 10 + *fmt - '0';
153	fmt++;
154	}
155
156	switch (*fmt++) {
157	case '%':
158	d++;
159	break;
160	case 'd':
161	case 'i':
162	ival = va_arg(ap, int);
163	if (ival < 0) {
164	buf[d++] = '-';
165	ival = -ival;
166	}
167	for (i = 1000000000; i >= 10; i /= 10)
168	if (ival >= i)
169	break;
170	for (; i >= 10; i /= 10) {
171	buf[d++] = '0' + ival / i;
172	ival %= i;
173	}
174	buf[d++] = '0' + ival;
175	break;
176	case 'x':
177	uval = va_arg(ap, int);
178	while (fwidth > 1 && uval < (1 << (fwidth - 1) * 4)) {
179	buf[d++] = prefix0 ? '0' : ' ';
180	fwidth--;
181	}
182	for (j = 1; j < 8 && uval >= (1 << j * 4); j++)
183	;
184	for (j--; j >= 0; j--)
185	buf[d++] = hexchars[(uval >> j * 4) & 0x0f];
186	break;
187	case 's':
188	s = va_arg(ap, char *);
189	while (*s && d < PRINTF_LEN)
190	buf[d++] = *s++;
191	break;
192	default:
193	// don't handle, for now
194	d++;
195	va_arg(ap, void *);
196	break;
197	}
198	}
199	buf[d] = 0;
200	va_end(ap);
201
202	if (d != 0) {
203	// line without \n
204	VDP_drawTextML(buf, APLANE, printf_xpos,
205	printf_ypos & (PLANE_H - 1));
206	printf_xpos += d;
207	}
208
209	return d; // wrong..
210	}
211
212	int main()
213	{
214	OsRoutine *ed;
215	u8 seed, bad = 0;
216	u8 *p, val;
217	int i, t, len;
218
219	ed = (OsRoutine ) (u32 *)0x1A0;
220	ed->memInitDmaCode();
221
222	ed->VDP_setReg(VDP_MODE1, 0x04);
223	ed->VDP_setReg(VDP_MODE2, 0x64);
224	ed->VDP_setReg(VDP_AUTOINC, 2);
225	ed->VDP_setReg(VDP_SCROLLSZ, 0x01);
226
227	/* clear name tables */
228	write32(GFX_CTRL_PORT, GFX_WRITE_VRAM_ADDR(APLANE));
229	for (i = 0; i < PLANE_W * PLANE_H / 2; i++)
230	write32(GFX_DATA_PORT, 0);
231
232	write32(GFX_CTRL_PORT, GFX_WRITE_VRAM_ADDR(BPLANE));
233	for (i = 0; i < PLANE_W * PLANE_H / 2; i++)
234	write32(GFX_DATA_PORT, 0);
235
236	/* scroll planes */
237	write32(GFX_CTRL_PORT, GFX_WRITE_VSRAM_ADDR(0));
238	write32(GFX_DATA_PORT, 0);
239
240	/* note: relying on ED menu's font setup here.. */
241
242	printf("\n");
243	printf("MD version: %02x\n", read8(0xa10001));
244	printf("ED os/fw: %d/%d\n\n", ed->osGetOsVersion(),
245	ed->osGetFirmVersion());
246
247	seed = read8(0xC00009);
248	p = (void *)0x200000;
249	len = 0x200000;
250	printf("filling SDRAM, seed=%02x.. ", seed);
251
252	val = seed;
253	for (i = 0; i < len; i++)
254	p[i] = val++;
255
256	printf("done.\n");
257
258	for (t = 1; ; t++) {
259	printf("executing stop.. ");
260	for (i = 0; i < 5 * 60; i++)
261	asm volatile("stop #0x2000");
262	printf("done\n");
263
264	printf("checking memory..\n");
265
266	val = seed;
267	for (i = 0; i < len; i++) {
268	if (p[i] != val) {
269	printf("bad: %06x: got %02x, expected %02x\n",
270	&p[i], p[i], val);
271	bad = 1;
272	}
273	val++;
274	}
275
276	printf("done. Try %d: test ", t);
277	if (bad) {
278	printf("FAILED\n");
279	break;
280	}
281	printf("PASSED\n");
282	}
283
284	/* there are not enough STOP opcodes in this world :D */
285	while (1)
286	asm volatile("stop #0x2000");
287
288	return 0;
289	}
290
291	// vim:ts=4:sw=4:expandtab