2 * GINGE - GINGE Is Not Gp2x Emulator
3 * (C) notaz, 2010-2011,2016
5 * This work is licensed under the MAME license, see COPYING file for details.
9 #error loader is meant to be OABI!
16 #include <sys/types.h>
20 #include <sys/types.h>
23 #include <asm/ucontext.h>
27 #include <sys/resource.h>
28 #include <sys/ioctl.h>
29 #include <sys/syscall.h>
30 #include <linux/soundcard.h>
32 #include <linux/futex.h>
35 #include "../common/host_fb.h"
36 #include "../common/cmn.h"
38 #include "realfuncs.h"
41 #if (DBG & 2) && !(DBG & 4)
56 #define iolog_unh log_io
58 #define iolog_unh(...)
62 #define segvlog g_printf
67 #if defined(LOG_IO) || defined(LOG_IO_UNK)
68 #include "mmsp2-regs.h"
71 typedef unsigned long long u64;
72 typedef unsigned int u32;
73 typedef unsigned short u16;
74 typedef unsigned char u8;
76 #define THREAD_STACK_SIZE 0x200000
78 static int fb_sync_thread_paused;
79 static int fb_sync_thread_futex;
100 #define SRCCTRL_INVIDEO (1 << 8)
101 #define SRCCTRL_SRCENB (1 << 7)
102 #define CTRL_TRANSPARENCYENB (1 << 11)
108 u32 mlc_stl_adr; // mlcaddress for pollux
116 u16 mlc_stl_pallt_d[256*2];
117 u32 mlc_stl_pallt_d32[256];
127 u32 btn_state; // as seen through /dev/GPIO: 0PVdVu YXBA RLSeSt 0Ri0Dn 0Le0Up
135 #define pollux mmsp2 // so that code doesn't look that weird
138 DIRTY_PAL_POLLUX = 2,
142 #if defined(LOG_IO) || defined(LOG_IO_UNK)
143 static void log_io(const char *pfx, u32 a, u32 d, int size)
145 const char *fmt, *reg = "";
147 case 8: fmt = "%s %08x %02x %s\n"; d &= 0xff; break;
148 case 32: fmt = "%s %08x %08x %s\n"; break;
149 default: fmt = "%s %08x %04x %s\n"; d &= 0xffff; break;
152 if ((a & ~0xffff) == 0x7f000000)
153 reg = regnames[a & 0xffff];
155 g_printf(fmt, pfx, a, d, reg);
159 static void memset16(void *dst, u32 pattern, int count)
164 d = (u16 *)((long)dst & ~1);
170 pattern |= pattern << 16;
177 *(u16 *)dl = pattern;
180 static void blt_tr(void *dst, void *src, u32 trc, int w)
182 u16 *d = (u16 *)((long)dst & ~1);
183 u16 *s = (u16 *)((long)src & ~1);
186 for (; w > 0; d++, s++, w--)
191 #define dump_blitter() \
193 u32 *r = &blitter.dstctrl; \
195 for (i = 0; i < 4*4; i++, r++) { \
196 g_printf("%08x ", *r); \
202 static void *uppermem_lookup(u32 addr, u8 **mem_end)
204 // XXX: maybe support mirroring?
205 if ((addr & 0xfe000000) != 0x02000000)
208 *mem_end = (u8 *)mmsp2.umem + 0x02000000;
209 return (u8 *)mmsp2.umem - 0x02000000 + addr;
212 static void blitter_do(void)
214 u8 *dst, *dste, *src = NULL, *srce = NULL;
215 int w, h, sstrd, dstrd;
219 w = blitter.size & 0x7ff;
220 h = (blitter.size >> 16) & 0x7ff;
221 sstrd = blitter.srcstride;
222 dstrd = blitter.dststride;
224 // XXX: need to confirm this..
225 addr = (blitter.dstaddr & ~3) | ((blitter.dstctrl & 0x1f) >> 3);
227 // use dst bpp.. How does it do blits with different src bpp?
228 bpp = (blitter.dstctrl & 0x20) ? 16 : 8;
231 if (((w == 320 && h == 240) || // blit whole screen
232 (w * h >= 320*240/2)) && // ..or at least half of the area
233 mmsp2.mlc_stl_adr <= addr && addr < mmsp2.mlc_stl_adr + 320*240*2)
236 dst = uppermem_lookup(addr, &dste);
238 // XXX: assume fill if no SRCENB, but it could be pattern blit..
239 if (blitter.srcctrl & SRCCTRL_SRCENB) {
240 if (!(blitter.srcctrl & SRCCTRL_INVIDEO))
243 addr = (blitter.srcaddr & ~3) | ((blitter.srcctrl & 0x1f) >> 3);
244 src = uppermem_lookup(addr, &srce);
248 if (src + sstrd * h > srce) {
249 err("blit %08x->%08x %dx%d did not fit src\n",
250 blitter.srcaddr, blitter.dstaddr, w, h);
251 h = (srce - src) / sstrd;
258 if (dst + dstrd * h > dste) {
259 err("blit %08x->%08x %dx%d did not fit dst\n",
260 blitter.srcaddr, blitter.dstaddr, w, h);
261 h = (dste - dst) / dstrd;
266 if (bpp == 16 && (blitter.ctrl & CTRL_TRANSPARENCYENB)) {
267 u32 trc = blitter.ctrl >> 16;
268 for (; h > 0; h--, dst += dstrd, src += sstrd)
269 blt_tr(dst, src, trc, w);
272 for (; h > 0; h--, dst += dstrd, src += sstrd)
273 memcpy(dst, src, w * bpp / 8);
277 // fill. Assume the pattern is cleared and bg color is used
278 u32 bgc = blitter.patbackcolor & 0xffff;
280 for (; h > 0; h--, dst += dstrd)
281 memset16(dst, bgc, w);
284 for (; h > 0; h--, dst += dstrd)
285 memset(dst, bgc, w); // bgc?
290 fb_sync_thread_futex = 1;
291 g_futex_raw(&fb_sync_thread_futex, FUTEX_WAKE, 1, NULL);
296 err("blit %08x->%08x %dx%d translated to %p->%p\n",
297 blitter.srcaddr, blitter.dstaddr, w, h, src, dst);
301 // FIXME: pass real dimensions to blitters
302 static void mlc_flip(void *src, int bpp, int stride)
306 // only pass pal to host if it's dirty
307 if (bpp <= 8 && mmsp2.v.dirty_pal) {
308 if (mmsp2.v.dirty_pal == DIRTY_PAL_MMSP2)
309 host_video_update_pal32(mmsp2.mlc_stl_pallt_d32);
311 host_video_update_pal16(mmsp2.mlcpalette);
312 mmsp2.v.dirty_pal = 0;
315 if (bpp != old_bpp) {
316 host_video_change_bpp(bpp);
322 host_video_blit4(src, 320, 240, stride);
326 host_video_blit8(src, 320, 240, stride);
330 host_video_blit16(src, 320, 240, stride);
339 static void *fb_sync_thread(void *arg)
341 unsigned long sigmask[2] = { ~0ul, ~0ul };
342 struct timespec ts = { 0, 0 };
343 int invalid_fb_addr = 1;
344 int manual_refresh = 0;
345 int frame_counter = 0;
348 // this thread can't run any signal handlers since the
349 // app's stack/tls stuff will never be set up here
350 sigmask[0] &= ~(1ul << (SIGSEGV - 1));
351 g_rt_sigprocmask_raw(SIG_SETMASK, sigmask, NULL, sizeof(sigmask));
353 //ret = setpriority(PRIO_PROCESS, 0, -1);
354 //log("setpriority %d\n", ret);
356 // tell the main thread we're done init
357 fb_sync_thread_futex = 0;
358 g_futex_raw(&fb_sync_thread_futex, FUTEX_WAKE, 1, NULL);
361 u8 *gp2x_fb, *gp2x_fb_end;
363 wait_ret = g_futex_raw(&fb_sync_thread_futex, FUTEX_WAIT, 0, &ts);
365 // this is supposed to be done atomically, but to make life
366 // easier ignore it for now, race impact is low anyway
367 fb_sync_thread_futex = 0;
369 if (wait_ret != 0 && wait_ret != -EWOULDBLOCK
370 && wait_ret != -ETIMEDOUT)
372 err("fb_thread: futex error: %d\n", wait_ret);
376 if (fb_sync_thread_paused) {
377 ts.tv_nsec = 100000000;
382 ts.tv_nsec = 50000000;
384 if (manual_refresh == 2)
385 dbg("fb_thread: switch to manual refresh\n");
387 ts.tv_nsec = 16666667;
388 if (manual_refresh > 1)
389 dbg("fb_thread: switch to auto refresh\n");
393 gp2x_fb = uppermem_lookup(mmsp2.mlc_stl_adr, &gp2x_fb_end);
394 if (gp2x_fb == NULL || gp2x_fb + 320*240 * mmsp2.v.bpp / 8 > gp2x_fb_end) {
395 if (!invalid_fb_addr) {
396 err("fb_thread: %08x is out of range\n", mmsp2.mlc_stl_adr);
403 mlc_flip(gp2x_fb, mmsp2.v.bpp, mmsp2.v.stride);
406 if (frame_counter & 0x0f)
410 // this is to check for kill key, in case main thread hung
411 // or something else went wrong.
412 pollux.btn_state = host_read_btns();
416 static void fb_thread_pause(void)
418 fb_sync_thread_paused = 1;
419 // wait until it finishes last refresh
420 // that it might be doing now
424 static void fb_thread_resume(void)
426 fb_sync_thread_paused = 0;
429 static u32 xread32_io_cmn(u32 a, u32 *handled)
436 case 0x402c: // MLCVSTRIDE0
437 case 0x4060: // MLCVSTRIDE1
440 case 0x4038: // MLCADDRESS0
441 case 0x406c: // MLCADDRESS1
442 d = pollux.mlc_stl_adr;
445 // ???? ???? YXBA DURiLe ???? VdVuMS LR?? ????
446 // | GPIOC[31:16] | GPIOB[31:16] |
447 case 0xa058: // GPIOBPAD
448 d = (pollux.btn_state >> 1) & 0x0100;
449 d |= (pollux.btn_state << 1) & 0x0200;
450 d |= (pollux.btn_state >> 3) & 0x0080;
451 d |= (pollux.btn_state >> 5) & 0x0040;
452 d |= (pollux.btn_state >> 6) & 0x0c00;
456 case 0xa098: // GPIOCPAD
457 pollux.btn_state = host_read_btns();
458 d = (pollux.btn_state >> 8) & 0x00f0;
459 d |= (pollux.btn_state >> 1) & 0x0008;
460 d |= (pollux.btn_state << 2) & 0x0004;
461 d |= (pollux.btn_state >> 5) & 0x0002;
462 d |= (pollux.btn_state >> 2) & 0x0001;
474 static u32 xread8(u32 a)
476 iolog("r8 ", a, 0, 8);
477 iolog_unh("r8 ", a, 0, 8);
481 static u32 xread16(u32 a)
483 static u32 fudge, old_a;
486 if ((a & 0xffff0000) == 0x7f000000) {
494 // 0000 P000 VuVd00 0000 YXBA RLSeSt 0Ri0D 0Le0U
495 // | GPIOD |GPIOC[8:15]|GPIOM[0:7] |
498 case 0x1184: // GPIOC
499 d = ~mmsp2.btn_state & 0xff00;
502 case 0x1186: // GPIOD
503 t = ~mmsp2.btn_state;
504 d = (t >> 9) & 0x0080;
505 d |= (t >> 11) & 0x0040;
506 d |= (t >> 7) & 0x0800;
509 case 0x1198: // GPIOM
510 mmsp2.btn_state = host_read_btns();
511 d = ~mmsp2.btn_state & 0xff;
514 case 0x1836: // reserved
517 case 0x2816: // DPC_X_MAX
520 case 0x2818: // DPC_Y_MAX
524 d = mmsp2.mlc_stl_cntl;
528 d = mmsp2.mlc_stl_adrl;
532 d = mmsp2.mlc_stl_adrh;
535 d = mmsp2.mlc_stl_pallt_a;
539 d = xread32_io_cmn(a_, &t);
555 iolog_unh("r16", a, d & 0xffff, 16);
559 iolog("r16", a, d, 16);
563 static u32 xread32(u32 a)
566 if ((a & 0xfff00000) == 0x7f000000) {
573 case 0x0a00: // TCOUNT, 1/7372800s
574 g_clock_gettime_raw(CLOCK_REALTIME, &ts);
575 t64 = (u64)ts.tv_sec * 1000000000 + ts.tv_nsec;
576 // t * 7372800.0 / 1000000000 * 0x100000000 ~= t * 31665935
582 d = xread32_io_cmn(a_, &t);
589 if ((a & 0xfff00000) == 0x7f100000) {
590 u32 *bl = &blitter.dstctrl;
601 iolog_unh("r32", a, d, 32);
604 iolog("r32", a, d, 32);
608 static void xwrite8(u32 a, u32 d)
610 iolog("w8 ", a, d, 8);
611 iolog_unh("w8 ", a, d, 8);
614 static void xwrite16(u32 a, u32 d)
616 iolog("w16", a, d, 16);
617 if ((a & 0xfff00000) == 0x7f000000) {
622 mmsp2.mlc_stl_cntl = d | 0xaa;
624 mmsp2.v.bpp = mode ? mode * 8 : 4;
632 // odd addresses don't affect LCD. What about TV?
635 mmsp2.mlc_stl_adrl = d;
638 mmsp2.mlc_stl_adrh = d;
639 if (mmsp2.mlc_stl_adr != mmsp2.old_mlc_stl_adr) {
641 fb_sync_thread_futex = 1;
642 g_futex_raw(&fb_sync_thread_futex, FUTEX_WAKE, 1, NULL);
644 mmsp2.old_mlc_stl_adr = mmsp2.mlc_stl_adr;
647 mmsp2.mlc_stl_pallt_a = d & 0x1ff;
650 mmsp2.mlc_stl_pallt_d[mmsp2.mlc_stl_pallt_a++] = d;
651 mmsp2.mlc_stl_pallt_a &= 0x1ff;
652 mmsp2.v.dirty_pal = DIRTY_PAL_MMSP2;
656 iolog_unh("w16", a, d, 16);
659 static void xwrite32(u32 a, u32 d)
661 iolog("w32", a, d, 32);
663 if ((a & 0xfff00000) == 0x7f000000) {
667 case 0x4024: // MLCCONTROL0
668 case 0x4058: // MLCCONTROL1
669 pollux.mlccontrol = d;
671 return; // layer not enabled
672 if ((d >> 16) == 0x443A)
677 case 0x402c: // MLCVSTRIDE0
678 case 0x4060: // MLCVSTRIDE1
681 case 0x4038: // MLCADDRESS0
682 case 0x406c: // MLCADDRESS1
683 pollux.mlc_stl_adr = d;
684 if (d != mmsp2.old_mlc_stl_adr) {
686 fb_sync_thread_futex = 1;
687 g_futex_raw(&fb_sync_thread_futex, FUTEX_WAKE, 1, NULL);
689 mmsp2.old_mlc_stl_adr = d;
691 case 0x403c: // MLCPALETTE0
692 case 0x4070: // MLCPALETTE1
693 pollux.mlcpalette[d >> 24] = d;
694 pollux.v.dirty_pal = DIRTY_PAL_POLLUX;
698 if ((a & 0xfff00000) == 0x7f100000) {
699 u32 *bl = &blitter.dstctrl;
703 if (a_ == 0x34 && (d & 1))
708 iolog_unh("w32", a, d, 32);
711 #define LINKPAGE_SIZE 0x1000
712 #define LINKPAGE_COUNT 4
713 #define LINKPAGE_ALLOC (LINKPAGE_SIZE * LINKPAGE_COUNT)
722 void (*handler)(struct op_context *op_ctx);
726 struct op_stackframe {
731 static struct op_linkpage *g_linkpage;
732 static u32 *g_code_ptr;
733 static int g_linkpage_count;
736 C_EQ, C_NE, C_CS, C_CC, C_MI, C_PL, C_VS, C_VC,
737 C_HI, C_LS, C_GE, C_LT, C_GT, C_LE, C_AL,
746 #define BIT_SET(v, b) (v & (1 << (b)))
748 void emu_handle_op(struct op_context *op_ctx, struct op_stackframe *sframe)
750 u32 *regs = sframe->saved_regs;
751 u32 cpsr = sframe->cpsr;
753 u32 t, shift, ret, addr;
756 cond = (op & 0xf0000000) >> 28;
757 rd = (op & 0x0000f000) >> 12;
758 rn = (op & 0x000f0000) >> 16;
762 case C_EQ: if ( (cpsr & CPSR_Z)) break; return;
763 case C_NE: if (!(cpsr & CPSR_Z)) break; return;
764 case C_CS: if ( (cpsr & CPSR_C)) break; return;
765 case C_CC: if (!(cpsr & CPSR_C)) break; return;
766 case C_MI: if ( (cpsr & CPSR_N)) break; return;
767 case C_PL: if (!(cpsr & CPSR_N)) break; return;
768 case C_VS: if ( (cpsr & CPSR_V)) break; return;
769 case C_VC: if (!(cpsr & CPSR_V)) break; return;
775 if ((op & 0x0f200090) == 0x01000090) { // AM3: LDRH, STRH
776 if (!BIT_SET(op, 5)) // !H
778 if (BIT_SET(op, 6) && !BIT_SET(op, 20)) // S && !L
781 if (BIT_SET(op, 22)) // imm offset
782 t = ((op & 0xf00) >> 4) | (op & 0x0f);
784 t = regs[op & 0x000f];
786 if (!BIT_SET(op, 23))
790 if (BIT_SET(op, 20)) { // Load
792 if (BIT_SET(op, 6)) { // S
794 ret = (signed int)ret >> 16;
799 xwrite16(addr, regs[rd]);
801 else if ((op & 0x0c000000) == 0x04000000) { // load/store word/byte
803 goto unhandled; // unprivileged
804 if (BIT_SET(op, 25)) { // reg offs
806 goto unhandled; // nah it's media
808 t = regs[op & 0x000f];
809 shift = (op & 0x0f80) >> 7;
810 switch ((op & 0x0060) >> 5) {
811 case 0: t = t << shift; break;
812 case 1: t = t >> (shift + 1); break;
813 case 2: t = (signed int)t >> (shift + 1); break;
814 case 3: goto unhandled; // I'm just lazy
820 if (!BIT_SET(op, 23))
824 if (BIT_SET(op, 24)) // pre-indexed
826 if (!BIT_SET(op, 24) || BIT_SET(op, 21))
827 regs[rn] += t; // writeback
829 if (BIT_SET(op, 20)) { // Load
830 if (BIT_SET(op, 22)) // Byte
837 if (BIT_SET(op, 22)) // Byte
838 xwrite8(addr, regs[rd]);
840 xwrite32(addr, regs[rd]);
847 if (addr != addr_check) {
848 fprintf(stderr, "bad calculated addr: %08x vs %08x\n", addr, addr_check);
855 err("unhandled IO op %08x @ %08x\n", op, op_ctx->pc);
856 for (i = 0; i < 8-1; i++)
857 err(" r%d=%08x r%-2d=%08x\n", i, regs[i], i+8, regs[i+8]);
858 err(" r%d=%08x cpsr=%08x\n", i, regs[i], cpsr);
862 static u32 make_offset12(u32 *pc, u32 *target)
866 lp_offs = (char *)target - (char *)pc - 2*4;
871 if (lp_offs >= LINKPAGE_SIZE) {
872 err("linkpage too far: %d\n", lp_offs);
876 return (u << 23) | lp_offs;
879 static u32 make_jmp(u32 *pc, u32 *target, int bl)
883 jmp_val = target - pc - 2;
884 if (jmp_val < (int)0xff000000 || jmp_val > 0x00ffffff) {
885 err("jump out of range (%p -> %p)\n", pc, target);
889 return 0xea000000 | (bl << 24) | (jmp_val & 0x00ffffff);
892 static void emit_op(u32 op)
897 static void emit_op_io(u32 op, u32 *target)
899 op |= make_offset12(g_code_ptr, target);
903 static void init_linkpage(void)
905 g_linkpage->handler = emu_call_handle_op;
906 g_code_ptr = g_linkpage->code;
909 static void segv_sigaction(int num, siginfo_t *info, void *ctx)
911 struct ucontext *context = ctx;
912 u32 *regs = (u32 *)&context->uc_mcontext.arm_r0;
913 u32 *pc = (u32 *)regs[15];
914 struct op_context *op_ctx;
917 if (((regs[15] ^ (u32)&segv_sigaction) & 0xff000000) == 0 || // PC is in our segment or
918 (((regs[15] ^ (u32)g_linkpage) & ~(LINKPAGE_ALLOC - 1)) == 0) || // .. in linkpage
919 ((long)info->si_addr & 0xffe00000) != 0x7f000000) // faulting not where expected
921 // real crash - time to die
922 err("segv %d %p @ %08x\n", info->si_code, info->si_addr, regs[15]);
923 for (i = 0; i < 8; i++)
924 dbg(" r%d=%08x r%-2d=%08x\n", i, regs[i], i+8, regs[i+8]);
925 signal(num, SIG_DFL);
929 segvlog("segv %d %p @ %08x\n", info->si_code, info->si_addr, regs[15]);
932 op_ctx = (void *)g_code_ptr;
933 op_ctx->pc = (u32)pc;
935 g_code_ptr = &op_ctx->code[0];
937 // emit jump to code ptr
938 *pc = make_jmp(pc, g_code_ptr, 0);
941 emit_op (0xe50d0000 + 0xf00 - 4 * 0); // str r0, [sp, #(-0xf00 + r0_offs)]
942 emit_op (0xe50de000 + 0xf00 - 4 * 14); // str lr, [sp, #(-0xf00 + lr_offs)]
943 emit_op (0xe24f0000 + (g_code_ptr - (u32 *)op_ctx + 2) * 4); // sub r0, pc, #op_ctx
944 emit_op (0xe1a0e00f); // mov lr, pc
945 emit_op_io(0xe51ff000, (u32 *)&g_linkpage->handler); // ldr pc, =handle_op
946 emit_op (0xe51de000 + 0xf00 - 4 * 14); // ldr lr, [sp, #(-0xf00 + lr_offs)]
947 emit_op (make_jmp(g_code_ptr, pc + 1, 0)); // jmp <back>
950 sys_cacheflush(pc, pc + 1);
951 sys_cacheflush(g_linkpage, g_code_ptr);
953 lp_size = (char *)g_code_ptr - (char *)g_linkpage;
954 segvlog("code #%d %d/%d\n", g_linkpage_count, lp_size, LINKPAGE_SIZE);
956 if (lp_size + 13*4 > LINKPAGE_SIZE) {
958 if (g_linkpage_count >= LINKPAGE_COUNT) {
959 err("too many linkpages needed\n");
962 g_linkpage = (void *)((char *)g_linkpage + LINKPAGE_SIZE);
965 //handle_op(regs[15], op, regs, (u32)info->si_addr);
969 void emu_init(void *map_bottom)
971 sigaction_t segv_action = {
972 .sa_sigaction = segv_sigaction,
973 .sa_flags = SA_SIGINFO,
979 if (geteuid() == 0) {
980 err("don't try to run as root, device registers or memory "
981 "might get trashed crashing the OS or even damaging the device.\n");
986 g_linkpage = (void *)(((u32)map_bottom - LINKPAGE_ALLOC) & ~0xfff);
987 pret = mmap(g_linkpage, LINKPAGE_ALLOC, PROT_READ|PROT_WRITE,
988 MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED, -1, 0);
989 if (pret != g_linkpage) {
990 perror(PFX "mmap linkpage");
993 log("linkpages @ %p\n", g_linkpage);
999 err("can't init host\n");
1003 ret = host_video_init(NULL, 0);
1005 err("can't init host video\n");
1009 // TODO: check if this really fails on Wiz..
1010 mmsp2.umem = mmap(NULL, 0x2000000, PROT_READ|PROT_WRITE|PROT_EXEC,
1011 MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
1013 if (mmsp2.umem == MAP_FAILED) {
1014 // we are short on memmory on Wiz, need special handling
1015 extern void *host_mmap_upper(void);
1016 mmsp2.umem = host_mmap_upper();
1019 if (mmsp2.umem == MAP_FAILED) {
1020 perror(PFX "mmap upper mem");
1024 pret = mmap(NULL, THREAD_STACK_SIZE, PROT_READ|PROT_WRITE|PROT_EXEC,
1025 MAP_PRIVATE|MAP_ANONYMOUS|MAP_GROWSDOWN, -1, 0);
1026 if (mmsp2.umem == MAP_FAILED) {
1027 perror(PFX "mmap thread stack");
1030 fb_sync_thread_futex = 1;
1031 ret = g_clone(CLONE_VM | CLONE_FS | CLONE_FILES
1032 | CLONE_SIGHAND | CLONE_THREAD,
1033 (char *)pret + THREAD_STACK_SIZE, 0, 0, 0,
1035 if (ret == 0 || ret == -1) {
1036 perror(PFX "start fb thread");
1039 g_futex_raw(&fb_sync_thread_futex, FUTEX_WAIT, 1, NULL);
1042 mmsp2.mlc_stl_adr = 0x03101000; // fb2 is at 0x03381000
1043 mmsp2.mlc_stl_cntl = 0x4ab; // 16bpp, region 1 active
1044 mmsp2.v.width = 320;
1045 mmsp2.v.height = 240;
1046 mmsp2.v.stride = 320*2;
1048 mmsp2.v.dirty_pal = 1;
1050 sigemptyset(&segv_action.sa_mask);
1051 sigaction(SIGSEGV, &segv_action, NULL);
1054 long emu_read_gpiodev(void *buf, int count)
1057 err("gpiodev read %d?\n", count);
1063 mmsp2.btn_state = host_read_btns();
1064 memcpy(buf, &mmsp2.btn_state, count);
1068 static long emu_mmap_dev(unsigned int length, int prot, int flags, unsigned int offset)
1070 u8 *umem, *umem_end;
1073 if ((offset & ~0x1ffff) == 0xc0000000) {
1074 return g_mmap2_raw((void *)0x7f000000, length, PROT_NONE,
1075 MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED|MAP_NORESERVE, -1, 0);
1078 if ((offset & ~0xffff) == 0xe0020000) {
1079 return g_mmap2_raw((void *)0x7f100000, length, PROT_NONE,
1080 MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED|MAP_NORESERVE, -1, 0);
1083 if ((offset & 0xfe000000) != 0x02000000) {
1084 err("unexpected devmem mmap @ %08x\n", offset);
1088 umem = uppermem_lookup(offset, &umem_end);
1089 if (umem + length > umem_end)
1090 err("warning: uppermem @ %08x overflows by %d bytes\n",
1091 offset, umem + length - umem_end);
1093 dbg("upper mem @ %08x %x = %p\n", offset, length, umem);
1097 long emu_do_mmap(unsigned int length, int prot, int flags, int fd,
1098 unsigned int offset)
1100 if (fd == FAKEDEV_MEM)
1101 return emu_mmap_dev(length, prot, flags, offset);
1103 if (fd == FAKEDEV_FB0)
1104 return emu_mmap_dev(length, prot, flags, offset + 0x03101000);
1106 if (fd == FAKEDEV_FB1)
1107 return emu_mmap_dev(length, prot, flags, offset + 0x03381000);
1109 err("bad/ni mmap(?, %d, %x, %x, %d, %08x)\n", length, prot, flags, fd, offset);
1113 long emu_do_munmap(void *addr, unsigned int length)
1117 // don't allow to unmap upper mem
1118 if ((u8 *)mmsp2.umem <= p && p < (u8 *)mmsp2.umem + 0x2000000) {
1119 dbg("ignoring munmap: %p %x\n", addr, length);
1126 static void emu_sound_open(int fd)
1131 // set default buffer size to 16 * 1K
1132 frag = (16<<16) | 10; // 16K
1133 ret = g_ioctl_raw(fd, SNDCTL_DSP_SETFRAGMENT, &frag);
1135 err("snd ioctl SETFRAGMENT %08x: %d\n", frag, ret);
1139 static long emu_sound_ioctl(int fd, int request, void *argp)
1144 dbg("snd ioctl(%d, %08x, %p)", fd, request, argp);
1146 dbg_c(" [%d]", *arg);
1150 /* People set strange frag settings on GP2X, which even manage
1151 * to break audio on pandora (causes writes to fail).
1152 * Catch this and set to something that works. */
1154 case SNDCTL_DSP_SETFRAGMENT: {
1155 int bsize, frag, frag_cnt;
1161 frag = *arg & 0xffff;
1162 frag_cnt = *arg >> 16;
1163 bsize = frag_cnt << frag;
1164 if (frag < 10 || bsize < 4096*4 || bsize > 4096*4*2) {
1166 * ~4ms. gpSP wants small buffers or else it stutters
1167 * because of it's audio thread sync stuff
1168 * XXX: hardcoding, as low samplerates will result in small fragment size,
1169 * which itself causes ALSA stall and hangs the program.
1170 * Also some apps change samplerate without reopening /dev/dsp,
1171 * which causes ALSA to reject SNDCTL_DSP_SETFRAGMENT.
1173 bsize = 44100 / 250 * 4;
1175 for (frag = 0; bsize; bsize >>= 1, frag++)
1181 frag |= frag_cnt << 16;
1182 ret = g_ioctl_raw(fd, SNDCTL_DSP_SETFRAGMENT, &frag);
1184 err("snd ioctl SETFRAGMENT %08x: %ld\n", frag, ret);
1185 // indicate success even if we fail (because of ALSA mostly),
1186 // things like MikMod will bail out otherwise.
1189 case SNDCTL_DSP_SYNC:
1190 // Franxis tends to use sync/write loops, bad idea under ALSA
1196 return g_ioctl_raw(fd, request, argp);
1199 long emu_do_ioctl(int fd, int request, void *argp)
1201 if (fd == emu_interesting_fds[IFD_SOUND].fd)
1202 return emu_sound_ioctl(fd, request, argp);
1205 /* *********************** */
1212 case FBIOGET_FSCREENINFO: {
1213 struct fb_fix_screeninfo *fix = argp;
1215 memset(fix, 0, sizeof(*fix));
1216 strcpy(fix->id, "mmsp2_RGB0");
1217 fix->type = FB_TYPE_PACKED_PIXELS;
1218 fix->accel = FB_ACCEL_NONE;
1219 fix->visual = FB_VISUAL_TRUECOLOR;
1220 fix->line_length = 320*2;
1221 fix->smem_start = (fd == FAKEDEV_FB0) ? 0x03101000 : 0x03381000;
1222 fix->smem_len = 320*240*2;
1225 case FBIOGET_VSCREENINFO: {
1226 struct fb_var_screeninfo *var = argp;
1227 static const struct fb_bitfield fbb_red = { offset: 11, length: 5, };
1228 static const struct fb_bitfield fbb_green = { offset: 5, length: 6, };
1229 static const struct fb_bitfield fbb_blue = { offset: 0, length: 5, };
1231 memset(var, 0, sizeof(*var));
1232 var->activate = FB_ACTIVATE_NOW;
1234 var->xres_virtual = 320;
1236 var->yres_virtual = 240;
1239 var->vmode = FB_VMODE_NONINTERLACED;
1240 var->bits_per_pixel = 16;
1242 var->green = fbb_green;
1243 var->blue = fbb_blue;
1246 case FBIOPUT_VSCREENINFO: {
1247 struct fb_var_screeninfo *var = argp;
1248 dbg(" put vscreen: %dx%d@%d\n", var->xres, var->yres, var->bits_per_pixel);
1249 if (var->xres != 320 || var->yres != 240 || var->bits_per_pixel != 16)
1255 /* *********************** */
1257 // fake tty0 to make GPH SDL happy
1258 if (request == 0x4b46) // KDGKBENT
1264 err("bad/ni ioctl(%d, %08x, %p)\n", fd, request, argp);
1268 struct dev_fd_t emu_interesting_fds[] = {
1269 [IFD_SOUND] = { "/dev/dsp", -1, emu_sound_open },
1273 static const struct {
1277 { "/mnt/tmp", "./tmp" },
1280 static const char *wrap_path(const char *path)
1286 // do only path mapping for now
1287 for (i = 0; i < ARRAY_SIZE(path_map); i++) {
1288 p = strstr(path, path_map[i].from);
1290 size = strlen(path) + strlen(path_map[i].to) + 1;
1291 buff = malloc(size);
1295 strncpy(buff, path, len);
1296 snprintf(buff + len, size - len, "%s%s", path_map[i].to,
1297 path + len + strlen(path_map[i].from));
1298 dbg("mapped path \"%s\" -> \"%s\"\n", path, buff);
1306 static void wrap_path_free(const char *w_path, const char *old_path)
1308 if (w_path != old_path)
1309 free((void *)w_path);
1312 void *emu_do_fopen(const char *path, const char *mode)
1317 w_path = wrap_path(path);
1318 ret = fopen(w_path, mode);
1319 wrap_path_free(w_path, path);
1325 int emu_do_system(const char *command)
1327 static char tmp_path[512];
1333 if (command == NULL)
1336 for (p2 = command; *p2 && isspace(*p2); p2++)
1339 if (*p2 == '.') // relative path?
1341 else if (*p2 == '/' && strncmp(p2, "/bin", 4) && strncmp(p2, "/lib", 4)
1342 && strncmp(p2, "/sbin", 4) && strncmp(p2, "/usr", 4))
1343 // absolute path, but not a system command
1346 p2 = wrap_path(command);
1348 make_local_path(tmp_path, sizeof(tmp_path), "ginge_prep");
1349 p = tmp_path + strlen(tmp_path);
1351 snprintf(p, sizeof(tmp_path) - (p - tmp_path), " --nomenu %s", p2);
1354 snprintf(tmp_path, sizeof(tmp_path), "%s", p2);
1355 wrap_path_free(p2, command);
1357 dbg("system: \"%s\"\n", tmp_path);
1359 // the app might want the screen too..
1361 ret = system(tmp_path);
1366 int emu_do_execve(const char *filename, char *const argv[], char *const envp[])
1368 const char **new_argv;
1372 if (filename == NULL)
1375 if (strstr(filename, "/gp2xmenu") != NULL)
1378 for (i = 0; argv[i] != NULL; i++)
1382 new_argv = calloc(argc + 2, sizeof(new_argv[0]));
1383 if (new_argv == NULL)
1386 prep_path = malloc(512);
1387 if (prep_path == NULL)
1390 make_local_path(prep_path, 512, "ginge_prep");
1391 new_argv[0] = prep_path;
1392 new_argv[1] = "--nomenu";
1393 new_argv[2] = wrap_path(filename);
1395 if (argv[0] != NULL)
1396 for (i = 1; argv[i] != NULL; i++)
1397 new_argv[i + 2] = argv[i];
1399 dbg("execve \"%s\" %s \"%s\"\n", new_argv[0], new_argv[1], new_argv[2]);
1400 ret = execve(new_argv[0], (char **)new_argv, envp);
1405 // vim:shiftwidth=2:expandtab