1 // vim:shiftwidth=2:expandtab
10 #include <sys/types.h>
13 #include <asm/ucontext.h>
17 #include <sys/resource.h>
18 #include <sys/ioctl.h>
19 #include <linux/soundcard.h>
23 #include "../common/host_fb.h"
24 #include "../common/cmn.h"
25 #include "sys_cacheflush.h"
26 #include "realfuncs.h"
28 #if (DBG & 2) && !(DBG & 4)
43 #define iolog_unh log_io
45 #define iolog_unh(...)
49 #define segvlog printf
54 #if defined(LOG_IO) || defined(LOG_IO_UNK)
55 #include "mmsp2-regs.h"
58 typedef unsigned long long u64;
59 typedef unsigned int u32;
60 typedef unsigned short u16;
61 typedef unsigned char u8;
63 static pthread_mutex_t fb_mutex = PTHREAD_MUTEX_INITIALIZER;
64 static pthread_cond_t fb_cond = PTHREAD_COND_INITIALIZER;
85 #define SRCCTRL_INVIDEO (1 << 8)
86 #define SRCCTRL_SRCENB (1 << 7)
87 #define CTRL_TRANSPARENCYENB (1 << 11)
93 u32 mlc_stl_adr; // mlcaddress for pollux
101 u16 mlc_stl_pallt_d[256*2];
102 u32 mlc_stl_pallt_d32[256];
112 u32 btn_state; // as seen through /dev/GPIO: 0PVdVu YXBA RLSeSt 0Ri0Dn 0Le0Up
120 #define pollux mmsp2 // so that code doesn't look that weird
123 DIRTY_PAL_POLLUX = 2,
127 #if defined(LOG_IO) || defined(LOG_IO_UNK)
128 static void log_io(const char *pfx, u32 a, u32 d, int size)
130 const char *fmt, *reg = "";
132 case 8: fmt = "%s %08x %02x %s\n"; d &= 0xff; break;
133 case 32: fmt = "%s %08x %08x %s\n"; break;
134 default: fmt = "%s %08x %04x %s\n"; d &= 0xffff; break;
137 if ((a & ~0xffff) == 0x7f000000)
138 reg = regnames[a & 0xffff];
140 printf(fmt, pfx, a, d, reg);
144 static void memset16(void *dst, u32 pattern, int count)
149 d = (u16 *)((long)dst & ~1);
155 pattern |= pattern << 16;
162 *(u16 *)dl = pattern;
165 static void blt_tr(void *dst, void *src, u32 trc, int w)
167 u16 *d = (u16 *)((long)dst & ~1);
168 u16 *s = (u16 *)((long)src & ~1);
171 for (; w > 0; d++, s++, w--)
176 #define dump_blitter() \
178 u32 *r = &blitter.dstctrl; \
180 for (i = 0; i < 4*4; i++, r++) { \
181 printf("%08x ", *r); \
187 static void *uppermem_lookup(u32 addr, u8 **mem_end)
189 // XXX: maybe support mirroring?
190 if ((addr & 0xfe000000) != 0x02000000)
193 *mem_end = (u8 *)mmsp2.umem + 0x02000000;
194 return (u8 *)mmsp2.umem - 0x02000000 + addr;
197 static void blitter_do(void)
199 u8 *dst, *dste, *src = NULL, *srce = NULL;
200 int w, h, sstrd, dstrd;
204 w = blitter.size & 0x7ff;
205 h = (blitter.size >> 16) & 0x7ff;
206 sstrd = blitter.srcstride;
207 dstrd = blitter.dststride;
209 // XXX: need to confirm this..
210 addr = (blitter.dstaddr & ~3) | ((blitter.dstctrl & 0x1f) >> 3);
212 // use dst bpp.. How does it do blits with different src bpp?
213 bpp = (blitter.dstctrl & 0x20) ? 16 : 8;
216 if (((w == 320 && h == 240) || // blit whole screen
217 (w * h >= 320*240/2)) && // ..or at least half of the area
218 mmsp2.mlc_stl_adr <= addr && addr < mmsp2.mlc_stl_adr + 320*240*2)
221 dst = uppermem_lookup(addr, &dste);
223 // XXX: assume fill if no SRCENB, but it could be pattern blit..
224 if (blitter.srcctrl & SRCCTRL_SRCENB) {
225 if (!(blitter.srcctrl & SRCCTRL_INVIDEO))
228 addr = (blitter.srcaddr & ~3) | ((blitter.srcctrl & 0x1f) >> 3);
229 src = uppermem_lookup(addr, &srce);
233 if (src + sstrd * h > srce) {
234 err("blit %08x->%08x %dx%d did not fit src\n",
235 blitter.srcaddr, blitter.dstaddr, w, h);
236 h = (srce - src) / sstrd;
243 if (dst + dstrd * h > dste) {
244 err("blit %08x->%08x %dx%d did not fit dst\n",
245 blitter.srcaddr, blitter.dstaddr, w, h);
246 h = (dste - dst) / dstrd;
251 if (bpp == 16 && (blitter.ctrl & CTRL_TRANSPARENCYENB)) {
252 u32 trc = blitter.ctrl >> 16;
253 for (; h > 0; h--, dst += dstrd, src += sstrd)
254 blt_tr(dst, src, trc, w);
257 for (; h > 0; h--, dst += dstrd, src += sstrd)
258 memcpy(dst, src, w * bpp / 8);
262 // fill. Assume the pattern is cleared and bg color is used
263 u32 bgc = blitter.patbackcolor & 0xffff;
265 for (; h > 0; h--, dst += dstrd)
266 memset16(dst, bgc, w);
269 for (; h > 0; h--, dst += dstrd)
270 memset(dst, bgc, w); // bgc?
275 pthread_cond_signal(&fb_cond);
279 err("blit %08x->%08x %dx%d translated to %p->%p\n",
280 blitter.srcaddr, blitter.dstaddr, w, h, src, dst);
284 // FIXME: pass real dimensions to blitters
285 static void mlc_flip(void *src, int bpp, int stride)
289 // only pass pal to host if it's dirty
290 if (bpp <= 8 && mmsp2.v.dirty_pal) {
291 if (mmsp2.v.dirty_pal == DIRTY_PAL_MMSP2)
292 host_video_update_pal32(mmsp2.mlc_stl_pallt_d32);
294 host_video_update_pal16(mmsp2.mlcpalette);
295 mmsp2.v.dirty_pal = 0;
298 if (bpp != old_bpp) {
299 host_video_change_bpp(bpp);
305 host_video_blit4(src, 320, 240, stride);
309 host_video_blit8(src, 320, 240, stride);
313 host_video_blit16(src, 320, 240, stride);
322 #define ts_add_nsec(ts, ns) { \
324 if (ts.tv_nsec >= 1000000000) { \
326 ts.tv_nsec -= 1000000000; \
330 static int fb_sync_thread_paused;
332 static void *fb_sync_thread(void *arg)
334 int invalid_fb_addr = 1;
335 int manual_refresh = 0;
336 int frame_counter = 0;
340 //ret = pthread_setschedprio(pthread_self(), -1);
341 //log("pthread_setschedprio %d\n", ret);
342 //ret = setpriority(PRIO_PROCESS, 0, -1);
343 //log("setpriority %d\n", ret);
345 ret = clock_gettime(CLOCK_REALTIME, &ts);
347 perror(PFX "clock_gettime");
352 u8 *gp2x_fb, *gp2x_fb_end;
354 ret = pthread_mutex_lock(&fb_mutex);
355 wait_ret = pthread_cond_timedwait(&fb_cond, &fb_mutex, &ts);
356 ret |= pthread_mutex_unlock(&fb_mutex);
359 err("fb_thread: mutex error: %d\n", ret);
363 if (wait_ret != 0 && wait_ret != ETIMEDOUT) {
364 err("fb_thread: cond error: %d\n", wait_ret);
368 if (fb_sync_thread_paused) {
369 ts_add_nsec(ts, 100000000);
373 if (wait_ret != ETIMEDOUT) {
374 clock_gettime(CLOCK_REALTIME, &ts);
375 ts_add_nsec(ts, 50000000);
377 if (manual_refresh == 2)
378 dbg("fb_thread: switch to manual refresh\n");
380 ts_add_nsec(ts, 16666667);
381 if (manual_refresh > 1)
382 dbg("fb_thread: switch to auto refresh\n");
386 gp2x_fb = uppermem_lookup(mmsp2.mlc_stl_adr, &gp2x_fb_end);
387 if (gp2x_fb == NULL || gp2x_fb + 320*240 * mmsp2.v.bpp / 8 > gp2x_fb_end) {
388 if (!invalid_fb_addr) {
389 err("fb_thread: %08x is out of range\n", mmsp2.mlc_stl_adr);
396 mlc_flip(gp2x_fb, mmsp2.v.bpp, mmsp2.v.stride);
399 if (frame_counter & 0x0f)
403 // this is to check for kill key, in case main thread hung
404 // or something else went wrong.
405 pollux.btn_state = host_read_btns();
409 static void fb_thread_pause(void)
411 fb_sync_thread_paused = 1;
412 // wait until it finishes last refresh
413 // that it might be doing now
417 static void fb_thread_resume(void)
419 fb_sync_thread_paused = 0;
422 static u32 xread32_io_cmn(u32 a, u32 *handled)
429 case 0x402c: // MLCVSTRIDE0
430 case 0x4060: // MLCVSTRIDE1
433 case 0x4038: // MLCADDRESS0
434 case 0x406c: // MLCADDRESS1
435 d = pollux.mlc_stl_adr;
438 // ???? ???? YXBA DURiLe ???? VdVuMS LR?? ????
439 // | GPIOC[31:16] | GPIOB[31:16] |
440 case 0xa058: // GPIOBPAD
441 d = pollux.btn_state & 0x0300;
442 d |= (pollux.btn_state >> 3) & 0x0080;
443 d |= (pollux.btn_state >> 5) & 0x0040;
444 d |= (pollux.btn_state >> 6) & 0x0c00;
448 case 0xa098: // GPIOCPAD
449 pollux.btn_state = host_read_btns();
450 d = (pollux.btn_state >> 8) & 0x00f0;
451 d |= (pollux.btn_state >> 1) & 0x0008;
452 d |= (pollux.btn_state << 2) & 0x0004;
453 d |= (pollux.btn_state >> 5) & 0x0002;
454 d |= (pollux.btn_state >> 2) & 0x0001;
466 static u32 xread8(u32 a)
468 iolog("r8 ", a, 0, 8);
469 iolog_unh("r8 ", a, 0, 8);
473 static u32 xread16(u32 a)
475 static u32 fudge, old_a;
478 if ((a & 0xffff0000) == 0x7f000000) {
486 // 0000 P000 VuVd00 0000 YXBA RLSeSt 0Ri0D 0Le0U
487 // | GPIOD |GPIOC[8:15]|GPIOM[0:7] |
490 case 0x1184: // GPIOC
491 d = ~mmsp2.btn_state & 0xff00;
494 case 0x1186: // GPIOD
495 t = ~mmsp2.btn_state;
496 d = (t >> 9) & 0x0080;
497 d |= (t >> 11) & 0x0040;
498 d |= (t >> 7) & 0x0800;
501 case 0x1198: // GPIOM
502 mmsp2.btn_state = host_read_btns();
503 d = ~mmsp2.btn_state & 0xff;
506 case 0x1836: // reserved
509 case 0x2816: // DPC_X_MAX
512 case 0x2818: // DPC_Y_MAX
516 d = mmsp2.mlc_stl_cntl;
520 d = mmsp2.mlc_stl_adrl;
524 d = mmsp2.mlc_stl_adrh;
527 d = mmsp2.mlc_stl_pallt_a;
531 d = xread32_io_cmn(a_, &t);
547 iolog_unh("r16", a, d & 0xffff, 16);
551 iolog("r16", a, d, 16);
555 static u32 xread32(u32 a)
558 if ((a & 0xfff00000) == 0x7f000000) {
565 case 0x0a00: // TCOUNT, 1/7372800s
566 clock_gettime(CLOCK_REALTIME, &ts);
567 t64 = (u64)ts.tv_sec * 1000000000 + ts.tv_nsec;
568 // t * 7372800.0 / 1000000000 * 0x100000000 ~= t * 31665935
574 d = xread32_io_cmn(a_, &t);
581 if ((a & 0xfff00000) == 0x7f100000) {
582 u32 *bl = &blitter.dstctrl;
593 iolog_unh("r32", a, d, 32);
596 iolog("r32", a, d, 32);
600 static void xwrite8(u32 a, u32 d)
602 iolog("w8 ", a, d, 8);
603 iolog_unh("w8 ", a, d, 8);
606 static void xwrite16(u32 a, u32 d)
608 iolog("w16", a, d, 16);
609 if ((a & 0xfff00000) == 0x7f000000) {
614 mmsp2.mlc_stl_cntl = d | 0xaa;
616 mmsp2.v.bpp = mode ? mode * 8 : 4;
624 // odd addresses don't affect LCD. What about TV?
627 mmsp2.mlc_stl_adrl = d;
630 mmsp2.mlc_stl_adrh = d;
631 if (mmsp2.mlc_stl_adr != mmsp2.old_mlc_stl_adr)
633 pthread_cond_signal(&fb_cond);
634 mmsp2.old_mlc_stl_adr = mmsp2.mlc_stl_adr;
637 mmsp2.mlc_stl_pallt_a = d & 0x1ff;
640 mmsp2.mlc_stl_pallt_d[mmsp2.mlc_stl_pallt_a++] = d;
641 mmsp2.mlc_stl_pallt_a &= 0x1ff;
642 mmsp2.v.dirty_pal = DIRTY_PAL_MMSP2;
646 iolog_unh("w16", a, d, 16);
649 static void xwrite32(u32 a, u32 d)
651 iolog("w32", a, d, 32);
653 if ((a & 0xfff00000) == 0x7f000000) {
657 case 0x4024: // MLCCONTROL0
658 case 0x4058: // MLCCONTROL1
659 pollux.mlccontrol = d;
661 return; // layer not enabled
662 if ((d >> 16) == 0x443A)
667 case 0x402c: // MLCVSTRIDE0
668 case 0x4060: // MLCVSTRIDE1
671 case 0x4038: // MLCADDRESS0
672 case 0x406c: // MLCADDRESS1
673 pollux.mlc_stl_adr = d;
674 if (d != mmsp2.old_mlc_stl_adr)
676 pthread_cond_signal(&fb_cond);
677 mmsp2.old_mlc_stl_adr = d;
679 case 0x403c: // MLCPALETTE0
680 case 0x4070: // MLCPALETTE1
681 pollux.mlcpalette[d >> 24] = d;
682 pollux.v.dirty_pal = DIRTY_PAL_POLLUX;
686 if ((a & 0xfff00000) == 0x7f100000) {
687 u32 *bl = &blitter.dstctrl;
691 if (a_ == 0x34 && (d & 1))
696 iolog_unh("w32", a, d, 32);
699 #define LINKPAGE_SIZE 0x1000
700 #define LINKPAGE_COUNT 4
701 #define LINKPAGE_ALLOC (LINKPAGE_SIZE * LINKPAGE_COUNT)
710 void (*handler)(struct op_context *op_ctx);
714 struct op_stackframe {
719 static struct op_linkpage *g_linkpage;
720 static u32 *g_code_ptr;
721 static int g_linkpage_count;
723 #define BIT_SET(v, b) (v & (1 << (b)))
725 void emu_handle_op(struct op_context *op_ctx, struct op_stackframe *sframe)
727 u32 *regs = sframe->saved_regs;
729 u32 t, shift, ret, addr;
732 rd = (op & 0x0000f000) >> 12;
733 rn = (op & 0x000f0000) >> 16;
735 if ((op & 0x0f200090) == 0x01000090) { // AM3: LDRH, STRH
736 if (!BIT_SET(op, 5)) // !H
738 if (BIT_SET(op, 6) && !BIT_SET(op, 20)) // S && !L
741 if (BIT_SET(op, 22)) // imm offset
742 t = ((op & 0xf00) >> 4) | (op & 0x0f);
744 t = regs[op & 0x000f];
746 if (!BIT_SET(op, 23))
750 if (BIT_SET(op, 20)) { // Load
752 if (BIT_SET(op, 6)) { // S
754 ret = (signed int)ret >> 16;
759 xwrite16(addr, regs[rd]);
761 else if ((op & 0x0d200000) == 0x05000000) { // AM2: LDR[B], STR[B]
762 if (BIT_SET(op, 25)) { // reg offs
766 t = regs[op & 0x000f];
767 shift = (op & 0x0f80) >> 7;
768 switch ((op & 0x0060) >> 5) {
769 case 0: t = t << shift; break;
770 case 1: t = t >> (shift + 1); break;
771 case 2: t = (signed int)t >> (shift + 1); break;
772 case 3: goto unhandled; // I'm just lazy
778 if (!BIT_SET(op, 23))
782 if (BIT_SET(op, 20)) { // Load
783 if (BIT_SET(op, 22)) // Byte
790 if (BIT_SET(op, 22)) // Byte
791 xwrite8(addr, regs[rd]);
793 xwrite32(addr, regs[rd]);
800 if (addr != addr_check) {
801 fprintf(stderr, "bad calculated addr: %08x vs %08x\n", addr, addr_check);
808 err("unhandled IO op %08x @ %08x\n", op, op_ctx->pc);
811 static u32 make_offset12(u32 *pc, u32 *target)
815 lp_offs = (char *)target - (char *)pc - 2*4;
820 if (lp_offs >= LINKPAGE_SIZE) {
821 err("linkpage too far: %d\n", lp_offs);
825 return (u << 23) | lp_offs;
828 static u32 make_jmp(u32 *pc, u32 *target, int bl)
832 jmp_val = target - pc - 2;
833 if (jmp_val < (int)0xff000000 || jmp_val > 0x00ffffff) {
834 err("jump out of range (%p -> %p)\n", pc, target);
838 return 0xea000000 | (bl << 24) | (jmp_val & 0x00ffffff);
841 static void emit_op(u32 op)
846 static void emit_op_io(u32 op, u32 *target)
848 op |= make_offset12(g_code_ptr, target);
852 static void init_linkpage(void)
854 g_linkpage->handler = emu_call_handle_op;
855 g_code_ptr = g_linkpage->code;
858 static void segv_sigaction(int num, siginfo_t *info, void *ctx)
860 struct ucontext *context = ctx;
861 u32 *regs = (u32 *)&context->uc_mcontext.arm_r0;
862 u32 *pc = (u32 *)regs[15];
863 struct op_context *op_ctx;
866 if (((regs[15] ^ (u32)&segv_sigaction) & 0xff000000) == 0 || // PC is in our segment or
867 (((regs[15] ^ (u32)g_linkpage) & ~(LINKPAGE_ALLOC - 1)) == 0) || // .. in linkpage
868 ((long)info->si_addr & 0xffe00000) != 0x7f000000) // faulting not where expected
870 // real crash - time to die
871 err("segv %d %p @ %08x\n", info->si_code, info->si_addr, regs[15]);
872 for (i = 0; i < 8; i++)
873 dbg(" r%d=%08x r%2d=%08x\n", i, regs[i], i+8, regs[i+8]);
874 signal(num, SIG_DFL);
878 segvlog("segv %d %p @ %08x\n", info->si_code, info->si_addr, regs[15]);
881 op_ctx = (void *)g_code_ptr;
882 op_ctx->pc = (u32)pc;
884 g_code_ptr = &op_ctx->code[0];
886 // emit jump to code ptr
887 *pc = make_jmp(pc, g_code_ptr, 0);
890 emit_op (0xe50d0000 + 0xf00 - 4 * 0); // str r0, [sp, #(-0xf00 + r0_offs)]
891 emit_op (0xe50de000 + 0xf00 - 4 * 14); // str lr, [sp, #(-0xf00 + lr_offs)]
892 emit_op (0xe24f0000 + (g_code_ptr - (u32 *)op_ctx + 2) * 4); // sub r0, pc, #op_ctx
893 emit_op (0xe1a0e00f); // mov lr, pc
894 emit_op_io(0xe51ff000, (u32 *)&g_linkpage->handler); // ldr pc, =handle_op
895 emit_op (0xe51de000 + 0xf00 - 4 * 14); // ldr lr, [sp, #(-0xf00 + lr_offs)]
896 emit_op (make_jmp(g_code_ptr, pc + 1, 0)); // jmp <back>
899 sys_cacheflush(pc, pc + 1);
900 sys_cacheflush(g_linkpage, g_code_ptr);
902 lp_size = (char *)g_code_ptr - (char *)g_linkpage;
903 segvlog("code #%d %d/%d\n", g_linkpage_count, lp_size, LINKPAGE_SIZE);
905 if (lp_size + 13*4 > LINKPAGE_SIZE) {
907 if (g_linkpage_count >= LINKPAGE_COUNT) {
908 err("too many linkpages needed\n");
911 g_linkpage = (void *)((char *)g_linkpage + LINKPAGE_SIZE);
914 //handle_op(regs[15], op, regs, (u32)info->si_addr);
918 void emu_init(void *map_bottom)
920 sigaction_t segv_action = {
921 .sa_sigaction = segv_sigaction,
922 .sa_flags = SA_SIGINFO,
928 g_linkpage = (void *)(((u32)map_bottom - LINKPAGE_ALLOC) & ~0xfff);
929 pret = mmap(g_linkpage, LINKPAGE_ALLOC, PROT_READ|PROT_WRITE,
930 MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED, -1, 0);
931 if (pret != g_linkpage) {
932 perror(PFX "mmap linkpage");
935 log("linkpages @ %p\n", g_linkpage);
941 err("can't init host\n");
945 ret = host_video_init(NULL, 0);
947 err("can't init host video\n");
952 // we are short on memmory on Wiz, need special handling
953 extern void *host_mmap_upper(void);
954 mmsp2.umem = host_mmap_upper();
956 mmsp2.umem = mmap(NULL, 0x2000000, PROT_READ|PROT_WRITE|PROT_EXEC,
957 MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
959 if (mmsp2.umem == MAP_FAILED) {
960 perror(PFX "mmap upper mem");
964 ret = pthread_create(&tid, NULL, fb_sync_thread, NULL);
966 err("failed to create fb_sync_thread: %d\n", ret);
972 mmsp2.mlc_stl_adr = 0x03101000; // fb2 is at 0x03381000
973 mmsp2.mlc_stl_cntl = 0x4ab; // 16bpp, region 1 active
975 mmsp2.v.height = 240;
976 mmsp2.v.stride = 320*2;
978 mmsp2.v.dirty_pal = 1;
980 sigemptyset(&segv_action.sa_mask);
981 sigaction(SIGSEGV, &segv_action, NULL);
984 int emu_read_gpiodev(void *buf, int count)
987 err("gpiodev read %d?\n", count);
993 mmsp2.btn_state = host_read_btns();
994 memcpy(buf, &mmsp2.btn_state, count);
998 static void *emu_mmap_dev(unsigned int length, int prot, int flags, unsigned int offset)
1000 u8 *umem, *umem_end;
1003 if ((offset & ~0x1ffff) == 0xc0000000) {
1004 return mmap((void *)0x7f000000, length, PROT_NONE,
1005 MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED|MAP_NORESERVE, -1, 0);
1008 if ((offset & ~0xffff) == 0xe0020000) {
1009 return mmap((void *)0x7f100000, length, PROT_NONE,
1010 MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED|MAP_NORESERVE, -1, 0);
1013 if ((offset & 0xfe000000) != 0x02000000) {
1014 err("unexpected devmem mmap @ %08x\n", offset);
1019 umem = uppermem_lookup(offset, &umem_end);
1020 if (umem + length > umem_end)
1021 err("warning: uppermem @ %08x overflows by %d bytes\n",
1022 offset, umem + length - umem_end);
1024 dbg("upper mem @ %08x %d\n", offset, length);
1028 void *emu_do_mmap(unsigned int length, int prot, int flags, int fd, unsigned int offset)
1030 if (fd == FAKEDEV_MEM)
1031 return emu_mmap_dev(length, prot, flags, offset);
1033 if (fd == FAKEDEV_FB0)
1034 return emu_mmap_dev(length, prot, flags, offset + 0x03101000);
1036 if (fd == FAKEDEV_FB1)
1037 return emu_mmap_dev(length, prot, flags, offset + 0x03381000);
1039 err("bad/ni mmap(?, %d, %x, %x, %d, %08x)\n", length, prot, flags, fd, offset);
1044 static void emu_sound_open(int fd)
1049 // set default buffer size to 16 * 1K
1050 frag = (16<<16) | 10; // 16K
1051 ret = ioctl(fd, SNDCTL_DSP_SETFRAGMENT, &frag);
1053 err("snd ioctl SETFRAGMENT %08x: ", frag);
1059 static int emu_sound_ioctl(int fd, int request, void *argp)
1064 dbg("snd ioctl(%d, %08x, %p)", fd, request, argp);
1066 dbg_c(" [%d]", *arg);
1070 /* People set strange frag settings on GP2X, which even manage
1071 * to break audio on pandora (causes writes to fail).
1072 * Catch this and set to something that works. */
1074 case SNDCTL_DSP_SETFRAGMENT: {
1075 int ret, bsize, frag, frag_cnt;
1079 frag = *arg & 0xffff;
1080 frag_cnt = *arg >> 16;
1081 bsize = frag_cnt << frag;
1082 if (frag < 10 || bsize < 4096*4 || bsize > 4096*4*2) {
1084 * ~4ms. gpSP wants small buffers or else it stutters
1085 * because of it's audio thread sync stuff
1086 * XXX: hardcoding, as low samplerates will result in small fragment size,
1087 * which itself causes ALSA stall and hangs the program.
1088 * Also some apps change samplerate without reopening /dev/dsp,
1089 * which causes ALSA to reject SNDCTL_DSP_SETFRAGMENT.
1091 bsize = 44100 / 250 * 4;
1093 for (frag = 0; bsize; bsize >>= 1, frag++)
1099 frag |= frag_cnt << 16;
1100 ret = ioctl(fd, SNDCTL_DSP_SETFRAGMENT, &frag);
1102 err("snd ioctl SETFRAGMENT %08x: ", frag);
1105 // indicate success even if we fail (because of ALSA mostly),
1106 // things like MikMod will bail out otherwise.
1109 case SNDCTL_DSP_SYNC:
1110 // Franxis tends to use sync/write loops, bad idea under ALSA
1116 return ioctl(fd, request, argp);
1119 int emu_do_ioctl(int fd, int request, void *argp)
1121 if (fd == emu_interesting_fds[IFD_SOUND].fd)
1122 return emu_sound_ioctl(fd, request, argp);
1125 /* *********************** */
1132 case FBIOGET_FSCREENINFO: {
1133 struct fb_fix_screeninfo *fix = argp;
1135 memset(fix, 0, sizeof(*fix));
1136 strcpy(fix->id, "mmsp2_RGB0");
1137 fix->type = FB_TYPE_PACKED_PIXELS;
1138 fix->accel = FB_ACCEL_NONE;
1139 fix->visual = FB_VISUAL_TRUECOLOR;
1140 fix->line_length = 320*2;
1141 fix->smem_start = (fd == FAKEDEV_FB0) ? 0x03101000 : 0x03381000;
1142 fix->smem_len = 320*240*2;
1145 case FBIOGET_VSCREENINFO: {
1146 struct fb_var_screeninfo *var = argp;
1147 static const struct fb_bitfield fbb_red = { offset: 11, length: 5, };
1148 static const struct fb_bitfield fbb_green = { offset: 5, length: 6, };
1149 static const struct fb_bitfield fbb_blue = { offset: 0, length: 5, };
1151 memset(var, 0, sizeof(*var));
1152 var->activate = FB_ACTIVATE_NOW;
1154 var->xres_virtual = 320;
1156 var->yres_virtual = 240;
1159 var->vmode = FB_VMODE_NONINTERLACED;
1160 var->bits_per_pixel = 16;
1162 var->green = fbb_green;
1163 var->blue = fbb_blue;
1166 case FBIOPUT_VSCREENINFO: {
1167 struct fb_var_screeninfo *var = argp;
1168 dbg(" put vscreen: %dx%d@%d\n", var->xres, var->yres, var->bits_per_pixel);
1169 if (var->xres != 320 || var->yres != 240 || var->bits_per_pixel != 16)
1175 /* *********************** */
1177 // fake tty0 to make GPH SDL happy
1178 if (request == 0x4b46) // KDGKBENT
1184 err("bad/ni ioctl(%d, %08x, %p)\n", fd, request, argp);
1189 struct dev_fd_t emu_interesting_fds[] = {
1190 [IFD_SOUND] = { "/dev/dsp", -1, emu_sound_open },
1194 static const struct {
1198 { "/mnt/tmp/", "/tmp/" },
1201 static const char *wrap_path(const char *path)
1207 // do only path mapping for now
1208 for (i = 0; i < ARRAY_SIZE(path_map); i++) {
1209 len = strlen(path_map[i].from);
1210 if (strncmp(path, path_map[i].from, len) == 0) {
1211 size = strlen(path) + strlen(path_map[i].to) + 1;
1212 buff = malloc(size);
1215 snprintf(buff, size, "%s%s", path_map[i].to, path + len);
1216 dbg("mapped path \"%s\" -> \"%s\"\n", path, buff);
1224 static void wrap_path_free(const char *w_path, const char *old_path)
1226 if (w_path != old_path)
1227 free((void *)w_path);
1230 void *emu_do_fopen(const char *path, const char *mode)
1235 w_path = wrap_path(path);
1236 ret = fopen(w_path, mode);
1237 wrap_path_free(w_path, path);
1243 int emu_do_system(const char *command)
1245 static char tmp_path[512];
1250 if (command == NULL)
1253 // pass through stuff in PATH
1254 p = strchr(command, ' ');
1255 p2 = strchr(command, '/');
1256 if (p2 == NULL || (p != NULL && p2 > p))
1257 return system(command);
1259 make_local_path(tmp_path, sizeof(tmp_path), "ginge_prep");
1260 p = tmp_path + strlen(tmp_path);
1262 p2 = wrap_path(command);
1263 snprintf(p, sizeof(tmp_path) - (p - tmp_path), " --nomenu %s", p2);
1264 wrap_path_free(p2, command);
1266 dbg("system: \"%s\"\n", tmp_path);
1268 // the app might want the screen too..
1270 ret = system(tmp_path);
1275 int emu_do_execve(const char *filename, char *const argv[], char *const envp[])
1277 const char **new_argv;
1281 if (filename == NULL)
1284 if (strstr(filename, "/gp2xmenu") != NULL)
1287 for (i = 0; argv[i] != NULL; i++)
1291 new_argv = calloc(argc + 2, sizeof(new_argv[0]));
1292 if (new_argv == NULL)
1295 prep_path = malloc(512);
1296 if (prep_path == NULL)
1299 make_local_path(prep_path, 512, "ginge_prep");
1300 new_argv[0] = prep_path;
1301 new_argv[1] = "--nomenu";
1302 new_argv[2] = wrap_path(filename);
1304 if (argv[0] != NULL)
1305 for (i = 1; argv[i] != NULL; i++)
1306 new_argv[i + 2] = argv[i];
1308 dbg("execve \"%s\" %s \"%s\"\n", new_argv[0], new_argv[1], new_argv[2]);
1309 ret = execve(new_argv[0], (char **)new_argv, envp);