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;
82 static int emu_force_snd_frag;
103 #define SRCCTRL_INVIDEO (1 << 8)
104 #define SRCCTRL_SRCENB (1 << 7)
105 #define CTRL_TRANSPARENCYENB (1 << 11)
111 u32 mlc_stl_adr; // mlcaddress for pollux
119 u16 mlc_stl_pallt_d[256*2];
120 u32 mlc_stl_pallt_d32[256];
130 u32 btn_state; // as seen through /dev/GPIO: 0PVdVu YXBA RLSeSt 0Ri0Dn 0Le0Up
138 #define pollux mmsp2 // so that code doesn't look that weird
141 DIRTY_PAL_POLLUX = 2,
145 #if defined(LOG_IO) || defined(LOG_IO_UNK)
146 static void log_io(const char *pfx, u32 a, u32 d, int size)
148 const char *fmt, *reg = "";
150 case 8: fmt = "%s %08x %02x %s\n"; d &= 0xff; break;
151 case 32: fmt = "%s %08x %08x %s\n"; break;
152 default: fmt = "%s %08x %04x %s\n"; d &= 0xffff; break;
155 if ((a & ~0xffff) == 0x7f000000)
156 reg = regnames[a & 0xffff];
158 g_printf(fmt, pfx, a, d, reg);
162 static void memset16(void *dst, u32 pattern, int count)
167 d = (u16 *)((long)dst & ~1);
173 pattern |= pattern << 16;
180 *(u16 *)dl = pattern;
183 static void blt_tr(void *dst, void *src, u32 trc, int w)
185 u16 *d = (u16 *)((long)dst & ~1);
186 u16 *s = (u16 *)((long)src & ~1);
189 for (; w > 0; d++, s++, w--)
194 #define dump_blitter() \
196 u32 *r = &blitter.dstctrl; \
198 for (i = 0; i < 4*4; i++, r++) { \
199 g_printf("%08x ", *r); \
205 static void *uppermem_lookup(u32 addr, u8 **mem_end)
207 // XXX: maybe support mirroring?
208 if ((addr & 0xfe000000) != 0x02000000)
211 *mem_end = (u8 *)mmsp2.umem + 0x02000000;
212 return (u8 *)mmsp2.umem - 0x02000000 + addr;
215 static void blitter_do(void)
217 u8 *dst, *dste, *src = NULL, *srce = NULL;
218 int w, h, sstrd, dstrd;
222 w = blitter.size & 0x7ff;
223 h = (blitter.size >> 16) & 0x7ff;
224 sstrd = blitter.srcstride;
225 dstrd = blitter.dststride;
227 // XXX: need to confirm this..
228 addr = (blitter.dstaddr & ~3) | ((blitter.dstctrl & 0x1f) >> 3);
230 // use dst bpp.. How does it do blits with different src bpp?
231 bpp = (blitter.dstctrl & 0x20) ? 16 : 8;
234 if (((w == 320 && h == 240) || // blit whole screen
235 (w * h >= 320*240/2)) && // ..or at least half of the area
236 mmsp2.mlc_stl_adr <= addr && addr < mmsp2.mlc_stl_adr + 320*240*2)
239 dst = uppermem_lookup(addr, &dste);
241 // XXX: assume fill if no SRCENB, but it could be pattern blit..
242 if (blitter.srcctrl & SRCCTRL_SRCENB) {
243 if (!(blitter.srcctrl & SRCCTRL_INVIDEO))
246 addr = (blitter.srcaddr & ~3) | ((blitter.srcctrl & 0x1f) >> 3);
247 src = uppermem_lookup(addr, &srce);
251 if (src + sstrd * h > srce) {
252 err("blit %08x->%08x %dx%d did not fit src\n",
253 blitter.srcaddr, blitter.dstaddr, w, h);
254 h = (srce - src) / sstrd;
261 if (dst + dstrd * h > dste) {
262 err("blit %08x->%08x %dx%d did not fit dst\n",
263 blitter.srcaddr, blitter.dstaddr, w, h);
264 h = (dste - dst) / dstrd;
269 if (bpp == 16 && (blitter.ctrl & CTRL_TRANSPARENCYENB)) {
270 u32 trc = blitter.ctrl >> 16;
271 for (; h > 0; h--, dst += dstrd, src += sstrd)
272 blt_tr(dst, src, trc, w);
275 for (; h > 0; h--, dst += dstrd, src += sstrd)
276 memcpy(dst, src, w * bpp / 8);
280 // fill. Assume the pattern is cleared and bg color is used
281 u32 bgc = blitter.patbackcolor & 0xffff;
283 for (; h > 0; h--, dst += dstrd)
284 memset16(dst, bgc, w);
287 for (; h > 0; h--, dst += dstrd)
288 memset(dst, bgc, w); // bgc?
293 fb_sync_thread_futex = 1;
294 g_futex_raw(&fb_sync_thread_futex, FUTEX_WAKE, 1, NULL);
299 err("blit %08x->%08x %dx%d translated to %p->%p\n",
300 blitter.srcaddr, blitter.dstaddr, w, h, src, dst);
304 // FIXME: pass real dimensions to blitters
305 static void mlc_flip(void *src, int bpp, int stride)
309 // only pass pal to host if it's dirty
310 if (bpp <= 8 && mmsp2.v.dirty_pal) {
311 if (mmsp2.v.dirty_pal == DIRTY_PAL_MMSP2)
312 host_video_update_pal32(mmsp2.mlc_stl_pallt_d32);
314 host_video_update_pal16(mmsp2.mlcpalette);
315 mmsp2.v.dirty_pal = 0;
318 if (bpp != old_bpp) {
319 host_video_change_bpp(bpp);
325 host_video_blit4(src, 320, 240, stride);
329 host_video_blit8(src, 320, 240, stride);
333 host_video_blit16(src, 320, 240, stride);
342 static void *fb_sync_thread(void *arg)
344 unsigned long sigmask[2] = { ~0ul, ~0ul };
345 struct timespec ts = { 0, 0 };
346 int invalid_fb_addr = 1;
347 int manual_refresh = 0;
348 int frame_counter = 0;
351 // this thread can't run any signal handlers since the
352 // app's stack/tls stuff will never be set up here
353 sigmask[0] &= ~(1ul << (SIGSEGV - 1));
354 g_rt_sigprocmask_raw(SIG_SETMASK, sigmask, NULL, sizeof(sigmask));
356 //ret = setpriority(PRIO_PROCESS, 0, -1);
357 //log("setpriority %d\n", ret);
359 // tell the main thread we're done init
360 fb_sync_thread_futex = 0;
361 g_futex_raw(&fb_sync_thread_futex, FUTEX_WAKE, 1, NULL);
364 u8 *gp2x_fb, *gp2x_fb_end;
366 wait_ret = g_futex_raw(&fb_sync_thread_futex, FUTEX_WAIT, 0, &ts);
368 // this is supposed to be done atomically, but to make life
369 // easier ignore it for now, race impact is low anyway
370 fb_sync_thread_futex = 0;
372 if (wait_ret != 0 && wait_ret != -EWOULDBLOCK
373 && wait_ret != -ETIMEDOUT)
375 err("fb_thread: futex error: %d\n", wait_ret);
379 if (fb_sync_thread_paused) {
380 ts.tv_nsec = 100000000;
385 ts.tv_nsec = 50000000;
387 if (manual_refresh == 2)
388 dbg("fb_thread: switch to manual refresh\n");
390 ts.tv_nsec = 16666667;
391 if (manual_refresh > 1)
392 dbg("fb_thread: switch to auto refresh\n");
396 gp2x_fb = uppermem_lookup(mmsp2.mlc_stl_adr, &gp2x_fb_end);
397 if (gp2x_fb == NULL || gp2x_fb + 320*240 * mmsp2.v.bpp / 8 > gp2x_fb_end) {
398 if (!invalid_fb_addr) {
399 err("fb_thread: %08x is out of range\n", mmsp2.mlc_stl_adr);
406 mlc_flip(gp2x_fb, mmsp2.v.bpp, mmsp2.v.stride);
409 if (frame_counter & 0x0f)
413 // this is to check for kill key, in case main thread hung
414 // or something else went wrong.
415 pollux.btn_state = host_read_btns();
419 static void fb_thread_pause(void)
421 fb_sync_thread_paused = 1;
422 // wait until it finishes last refresh
423 // that it might be doing now
427 static void fb_thread_resume(void)
429 fb_sync_thread_paused = 0;
432 static u32 xread32_io_cmn(u32 a, u32 *handled)
440 case 0x1980: // TIMER3 TMRCOUNT
441 // assume the timer is set up for microsec time
442 g_clock_gettime_raw(CLOCK_REALTIME, &ts);
443 d = ts.tv_sec * 1000000 + ((u64)(u32)ts.tv_nsec * 4294968 >> 32);
445 case 0x402c: // MLCVSTRIDE0
446 case 0x4060: // MLCVSTRIDE1
449 case 0x4038: // MLCADDRESS0
450 case 0x406c: // MLCADDRESS1
451 d = pollux.mlc_stl_adr;
454 // ???? ???? YXBA DURiLe ???? VdVuMS LR?? ????
455 // | GPIOC[31:16] | GPIOB[31:16] |
456 case 0xa058: // GPIOBPAD
457 d = (pollux.btn_state >> 1) & 0x0100;
458 d |= (pollux.btn_state << 1) & 0x0200;
459 d |= (pollux.btn_state >> 3) & 0x0080;
460 d |= (pollux.btn_state >> 5) & 0x0040;
461 d |= (pollux.btn_state >> 6) & 0x0c00;
465 case 0xa098: // GPIOCPAD
466 pollux.btn_state = host_read_btns();
467 d = (pollux.btn_state >> 8) & 0x00f0;
468 d |= (pollux.btn_state >> 1) & 0x0008;
469 d |= (pollux.btn_state << 2) & 0x0004;
470 d |= (pollux.btn_state >> 5) & 0x0002;
471 d |= (pollux.btn_state >> 2) & 0x0001;
483 static u32 xread8(u32 a)
485 iolog("r8 ", a, 0, 8);
486 iolog_unh("r8 ", a, 0, 8);
490 static u32 xread16(u32 a)
492 static u32 fudge, old_a;
495 if ((a & 0xffff0000) == 0x7f000000) {
503 // 0000 P000 VuVd00 0000 YXBA RLSeSt 0Ri0D 0Le0U
504 // | GPIOD |GPIOC[8:15]|GPIOM[0:7] |
507 case 0x1184: // GPIOC
508 d = ~mmsp2.btn_state & 0xff00;
511 case 0x1186: // GPIOD
512 t = ~mmsp2.btn_state;
513 d = (t >> 9) & 0x0080;
514 d |= (t >> 11) & 0x0040;
515 d |= (t >> 7) & 0x0800;
518 case 0x1198: // GPIOM
519 mmsp2.btn_state = host_read_btns();
520 d = ~mmsp2.btn_state & 0xff;
523 case 0x1836: // reserved
526 case 0x2816: // DPC_X_MAX
529 case 0x2818: // DPC_Y_MAX
533 d = mmsp2.mlc_stl_cntl;
537 d = mmsp2.mlc_stl_adrl;
541 d = mmsp2.mlc_stl_adrh;
544 d = mmsp2.mlc_stl_pallt_a;
548 d = xread32_io_cmn(a_, &t);
564 iolog_unh("r16", a, d & 0xffff, 16);
568 iolog("r16", a, d, 16);
572 static u32 xread32(u32 a)
575 if ((a & 0xfff00000) == 0x7f000000) {
582 case 0x0a00: // TCOUNT, 1/7372800s
583 g_clock_gettime_raw(CLOCK_REALTIME, &ts);
584 t64 = (u64)ts.tv_sec * 1000000000 + ts.tv_nsec;
585 // t * 7372800.0 / 1000000000 * 0x100000000 ~= t * 31665935
591 d = xread32_io_cmn(a_, &t);
598 if ((a & 0xfff00000) == 0x7f100000) {
599 u32 *bl = &blitter.dstctrl;
610 iolog_unh("r32", a, d, 32);
613 iolog("r32", a, d, 32);
617 static void xwrite8(u32 a, u32 d)
619 iolog("w8 ", a, d, 8);
620 iolog_unh("w8 ", a, d, 8);
623 static void xwrite16(u32 a, u32 d)
625 iolog("w16", a, d, 16);
626 if ((a & 0xfff00000) == 0x7f000000) {
631 mmsp2.mlc_stl_cntl = d | 0xaa;
633 mmsp2.v.bpp = mode ? mode * 8 : 4;
641 // odd addresses don't affect LCD. What about TV?
644 mmsp2.mlc_stl_adrl = d;
647 mmsp2.mlc_stl_adrh = d;
648 if (mmsp2.mlc_stl_adr != mmsp2.old_mlc_stl_adr) {
650 fb_sync_thread_futex = 1;
651 g_futex_raw(&fb_sync_thread_futex, FUTEX_WAKE, 1, NULL);
653 mmsp2.old_mlc_stl_adr = mmsp2.mlc_stl_adr;
655 case 0x2958: // MLC_STL_PALLT_A
656 mmsp2.mlc_stl_pallt_a = d & 0x1ff;
658 case 0x295a: // MLC_STL_PALLT_D
659 mmsp2.mlc_stl_pallt_d[mmsp2.mlc_stl_pallt_a++] = d;
660 mmsp2.mlc_stl_pallt_a &= 0x1ff;
661 mmsp2.v.dirty_pal = DIRTY_PAL_MMSP2;
665 iolog_unh("w16", a, d, 16);
668 static void xwrite32(u32 a, u32 d)
670 iolog("w32", a, d, 32);
672 if ((a & 0xfff00000) == 0x7f000000) {
676 case 0x295a: // MLC_STL_PALLT_D
677 // special unaligned 32bit write, allegro seems to rely on it
678 mmsp2.mlc_stl_pallt_d[mmsp2.mlc_stl_pallt_a++ & 0x1ff] = d;
679 mmsp2.mlc_stl_pallt_d[mmsp2.mlc_stl_pallt_a++ & 0x1ff] = d >> 16;
680 mmsp2.mlc_stl_pallt_a &= 0x1ff;
681 mmsp2.v.dirty_pal = DIRTY_PAL_MMSP2;
684 case 0x4024: // MLCCONTROL0
685 case 0x4058: // MLCCONTROL1
686 pollux.mlccontrol = d;
688 return; // layer not enabled
689 if ((d >> 16) == 0x443A)
694 case 0x402c: // MLCVSTRIDE0
695 case 0x4060: // MLCVSTRIDE1
698 case 0x4038: // MLCADDRESS0
699 case 0x406c: // MLCADDRESS1
700 pollux.mlc_stl_adr = d;
701 if (d != mmsp2.old_mlc_stl_adr) {
703 fb_sync_thread_futex = 1;
704 g_futex_raw(&fb_sync_thread_futex, FUTEX_WAKE, 1, NULL);
706 mmsp2.old_mlc_stl_adr = d;
708 case 0x403c: // MLCPALETTE0
709 case 0x4070: // MLCPALETTE1
710 pollux.mlcpalette[d >> 24] = d;
711 pollux.v.dirty_pal = DIRTY_PAL_POLLUX;
715 if ((a & 0xfff00000) == 0x7f100000) {
716 u32 *bl = &blitter.dstctrl;
720 if (a_ == 0x34 && (d & 1))
725 iolog_unh("w32", a, d, 32);
728 #define LINKPAGE_SIZE 0x1000
729 #define LINKPAGE_COUNT 4
730 #define LINKPAGE_ALLOC (LINKPAGE_SIZE * LINKPAGE_COUNT)
740 void (*handler)(struct op_context *op_ctx);
744 struct op_stackframe {
749 static struct op_linkpage *g_linkpages[2];
750 static int g_linkpage_count;
753 C_EQ, C_NE, C_CS, C_CC, C_MI, C_PL, C_VS, C_VC,
754 C_HI, C_LS, C_GE, C_LT, C_GT, C_LE, C_AL,
763 #define BIT_SET(v, b) (v & (1 << (b)))
765 void emu_handle_op(struct op_context *op_ctx, struct op_stackframe *sframe)
767 u32 *regs = sframe->saved_regs;
768 u32 cpsr = sframe->cpsr;
770 u32 t, shift, ret, addr;
773 cond = (op & 0xf0000000) >> 28;
774 rd = (op & 0x0000f000) >> 12;
775 rn = (op & 0x000f0000) >> 16;
779 case C_EQ: if ( (cpsr & CPSR_Z)) break; return;
780 case C_NE: if (!(cpsr & CPSR_Z)) break; return;
781 case C_CS: if ( (cpsr & CPSR_C)) break; return;
782 case C_CC: if (!(cpsr & CPSR_C)) break; return;
783 case C_MI: if ( (cpsr & CPSR_N)) break; return;
784 case C_PL: if (!(cpsr & CPSR_N)) break; return;
785 case C_VS: if ( (cpsr & CPSR_V)) break; return;
786 case C_VC: if (!(cpsr & CPSR_V)) break; return;
792 if ((op & 0x0f200090) == 0x01000090) { // AM3: LDRH, STRH
793 if (!BIT_SET(op, 5)) // !H
795 if (BIT_SET(op, 6) && !BIT_SET(op, 20)) // S && !L
798 if (BIT_SET(op, 22)) // imm offset
799 t = ((op & 0xf00) >> 4) | (op & 0x0f);
801 t = regs[op & 0x000f];
803 if (!BIT_SET(op, 23))
807 if (BIT_SET(op, 20)) { // Load
809 if (BIT_SET(op, 6)) { // S
811 ret = (signed int)ret >> 16;
816 xwrite16(addr, regs[rd]);
818 else if ((op & 0x0c000000) == 0x04000000) { // load/store word/byte
820 goto unhandled; // unprivileged
821 if (BIT_SET(op, 25)) { // reg offs
823 goto unhandled; // nah it's media
825 t = regs[op & 0x000f];
826 shift = (op & 0x0f80) >> 7;
827 switch ((op & 0x0060) >> 5) {
828 case 0: t = t << shift; break;
829 case 1: t = t >> (shift + 1); break;
830 case 2: t = (signed int)t >> (shift + 1); break;
831 case 3: goto unhandled; // I'm just lazy
837 if (!BIT_SET(op, 23))
841 if (BIT_SET(op, 24)) // pre-indexed
843 if (!BIT_SET(op, 24) || BIT_SET(op, 21))
844 regs[rn] += t; // writeback
846 if (BIT_SET(op, 20)) { // Load
847 if (BIT_SET(op, 22)) // Byte
854 if (BIT_SET(op, 22)) // Byte
855 xwrite8(addr, regs[rd]);
857 xwrite32(addr, regs[rd]);
864 if (addr != addr_check) {
865 fprintf(stderr, "bad calculated addr: %08x vs %08x\n", addr, addr_check);
872 err("unhandled IO op %08x @ %08x\n", op, op_ctx->pc);
873 for (i = 0; i < 8-1; i++)
874 err(" r%d=%08x r%-2d=%08x\n", i, regs[i], i+8, regs[i+8]);
875 err(" r%d=%08x cpsr=%08x\n", i, regs[i], cpsr);
879 static u32 make_offset12(u32 *pc, u32 *target)
883 lp_offs = (char *)target - (char *)pc - 2*4;
888 if (lp_offs >= LINKPAGE_SIZE) {
889 err("linkpage too far: %d\n", lp_offs);
893 return (u << 23) | lp_offs;
896 static u32 make_jmp(u32 *pc, u32 *target, int bl)
900 jmp_val = target - pc - 2;
901 if (jmp_val < (int)0xff800000 || jmp_val > 0x007fffff) {
902 err("jump out of range (%p -> %p)\n", pc, target);
906 return 0xea000000 | (bl << 24) | (jmp_val & 0x00ffffff);
909 static void emit_op(struct op_linkpage *linkpage, u32 op)
911 *linkpage->code_ptr++ = op;
914 static void emit_op_io(struct op_linkpage *linkpage,
917 op |= make_offset12(linkpage->code_ptr, target);
918 emit_op(linkpage, op);
921 static void init_linkpage(struct op_linkpage *linkpage)
923 linkpage->handler = emu_call_handle_op;
924 linkpage->code_ptr = linkpage->code;
927 static void segv_sigaction(int num, siginfo_t *info, void *ctx)
929 extern char _init, _end;
930 struct ucontext *context = ctx;
931 u32 *regs = (u32 *)&context->uc_mcontext.arm_r0;
932 u32 *pc = (u32 *)regs[15];
933 u32 self_start, self_end;
934 struct op_linkpage *lp = NULL;
935 struct op_context *op_ctx;
936 int i, ret, lp_i, lp_size;
938 self_start = (u32)&_init & ~0xfff;
939 self_end = (u32)&_end;
941 if ((self_start <= regs[15] && regs[15] <= self_end) || // PC is in our segment or
942 !((regs[15] ^ (u32)g_linkpages[0]) & ~(LINKPAGE_ALLOC - 1)) || // .. in linkpage
943 ((long)info->si_addr & 0xffe00000) != 0x7f000000) // faulting not where expected
945 // real crash - time to die
946 err("segv %d %p @ %08x\n", info->si_code, info->si_addr, regs[15]);
947 for (i = 0; i < 8; i++)
948 dbg(" r%d=%08x r%-2d=%08x\n", i, regs[i], i+8, regs[i+8]);
949 signal(num, SIG_DFL);
953 segvlog("segv %d %p @ %08x\n", info->si_code, info->si_addr, regs[15]);
955 // find nearby linkpage
956 for (lp_i = 0; lp_i < ARRAY_SIZE(g_linkpages); lp_i++) {
957 if (g_linkpages[lp_i] == NULL)
959 i = g_linkpages[lp_i]->code_ptr + 2 - pc - 2;
960 if ((int)0xff800000 <= i && i <= 0x007fffff) {
961 lp = g_linkpages[lp_i];
967 err("fatal: no nearby linkpage for %08x\n", regs[15]);
972 ret = mprotect((void *)((long)pc & ~0xfff), 0x1000, PROT_READ|PROT_WRITE|PROT_EXEC);
974 perror("warning: mprotect");
978 op_ctx = (void *)lp->code_ptr;
979 op_ctx->pc = (u32)pc;
981 lp->code_ptr = &op_ctx->code[0];
983 // emit jump to code ptr
984 *pc = make_jmp(pc, lp->code_ptr, 0);
987 emit_op (lp, 0xe50d0000 + 0xf00 - 4 * 0); // str r0, [sp, #(-0xf00 + r0_offs)]
988 emit_op (lp, 0xe50de000 + 0xf00 - 4 * 14); // str lr, [sp, #(-0xf00 + lr_offs)]
989 emit_op (lp, 0xe24f0000 + (lp->code_ptr - (u32 *)op_ctx + 2) * 4); // sub r0, pc, #op_ctx
990 emit_op (lp, 0xe1a0e00f); // mov lr, pc
991 emit_op_io(lp, 0xe51ff000, (u32 *)&lp->handler); // ldr pc, =handle_op
992 emit_op (lp, 0xe51de000 + 0xf00 - 4 * 14); // ldr lr, [sp, #(-0xf00 + lr_offs)]
993 emit_op (lp, make_jmp(lp->code_ptr, pc + 1, 0)); // jmp <back>
996 sys_cacheflush(pc, pc + 1);
997 sys_cacheflush(lp, lp->code_ptr);
999 lp_size = (char *)lp->code_ptr - (char *)lp;
1000 segvlog("code #%d %d/%d\n", g_linkpage_count, lp_size, LINKPAGE_SIZE);
1002 if (lp_size + 14*4 > LINKPAGE_SIZE) {
1004 if (g_linkpage_count >= LINKPAGE_COUNT) {
1005 err("too many linkpages needed\n");
1008 g_linkpages[lp_i] = (void *)((char *)g_linkpages[lp_i] + LINKPAGE_SIZE);
1009 init_linkpage(g_linkpages[lp_i]);
1011 //handle_op(regs[15], op, regs, (u32)info->si_addr);
1015 void emu_init(void *map_bottom[2], int is_dl)
1017 sigaction_t segv_action = {
1018 .sa_sigaction = segv_sigaction,
1019 .sa_flags = SA_SIGINFO,
1026 if (geteuid() == 0) {
1027 err("don't try to run as root, device registers or memory "
1028 "might get trashed crashing the OS or even damaging the device.\n");
1036 // set default buffer size to 8 * 1K
1037 emu_force_snd_frag = (8<<16) | 10;
1039 var = getenv("GINGE_SETFRAGMENT");
1041 emu_force_snd_frag = strtol(var, NULL, 0);
1043 for (i = 0; i < 2; i++) {
1044 if (map_bottom[i] == NULL)
1046 g_linkpages[i] = (void *)(((u32)map_bottom[i] - LINKPAGE_ALLOC) & ~0xfff);
1047 pret = mmap(g_linkpages[i], LINKPAGE_ALLOC, PROT_READ|PROT_WRITE,
1048 MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED, -1, 0);
1049 if (pret != g_linkpages[i]) {
1050 err("linkpage alloc @ %p: ", g_linkpages[i]);
1054 log("linkpages @ %p\n", g_linkpages[i]);
1055 init_linkpage(g_linkpages[i]);
1061 err("can't init host\n");
1065 ret = host_video_init(NULL, 0);
1067 err("can't init host video\n");
1071 // TODO: check if this really fails on Wiz..
1072 mmsp2.umem = mmap(NULL, 0x2000000, PROT_READ|PROT_WRITE|PROT_EXEC,
1073 MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
1075 if (mmsp2.umem == MAP_FAILED) {
1076 // we are short on memmory on Wiz, need special handling
1077 extern void *host_mmap_upper(void);
1078 mmsp2.umem = host_mmap_upper();
1081 if (mmsp2.umem == MAP_FAILED) {
1082 perror(PFX "mmap upper mem");
1086 pret = mmap(NULL, THREAD_STACK_SIZE, PROT_READ|PROT_WRITE|PROT_EXEC,
1087 MAP_PRIVATE|MAP_ANONYMOUS|MAP_GROWSDOWN, -1, 0);
1088 if (mmsp2.umem == MAP_FAILED) {
1089 perror(PFX "mmap thread stack");
1092 fb_sync_thread_futex = 1;
1093 ret = g_clone(CLONE_VM | CLONE_FS | CLONE_FILES
1094 | CLONE_SIGHAND | CLONE_THREAD,
1095 (char *)pret + THREAD_STACK_SIZE, 0, 0, 0,
1097 if (ret == 0 || ret == -1) {
1098 perror(PFX "start fb thread");
1101 g_futex_raw(&fb_sync_thread_futex, FUTEX_WAIT, 1, NULL);
1104 mmsp2.mlc_stl_adr = 0x03101000; // fb2 is at 0x03381000
1105 mmsp2.mlc_stl_cntl = 0x4ab; // 16bpp, region 1 active
1106 mmsp2.v.width = 320;
1107 mmsp2.v.height = 240;
1108 mmsp2.v.stride = 320*2;
1110 mmsp2.v.dirty_pal = 1;
1112 sigemptyset(&segv_action.sa_mask);
1113 sigaction(SIGSEGV, &segv_action, NULL);
1116 static long emu_mmap_dev(unsigned int length, int prot, int flags, unsigned int offset)
1118 u8 *umem, *umem_end;
1121 if ((offset & ~0x1ffff) == 0xc0000000) {
1122 return g_mmap2_raw((void *)0x7f000000, length, PROT_NONE,
1123 MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED|MAP_NORESERVE, -1, 0);
1126 if ((offset & ~0xffff) == 0xe0020000) {
1127 return g_mmap2_raw((void *)0x7f100000, length, PROT_NONE,
1128 MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED|MAP_NORESERVE, -1, 0);
1131 if ((offset & 0xfe000000) != 0x02000000) {
1132 err("unexpected devmem mmap @ %08x\n", offset);
1136 umem = uppermem_lookup(offset, &umem_end);
1137 if (umem + length > umem_end)
1138 err("warning: uppermem @ %08x overflows by %d bytes\n",
1139 offset, umem + length - umem_end);
1141 dbg("upper mem @ %08x %x = %p\n", offset, length, umem);
1145 long emu_do_mmap(unsigned int length, int prot, int flags, int fd,
1146 unsigned int offset)
1148 if (fd == FAKEDEV_MEM)
1149 return emu_mmap_dev(length, prot, flags, offset);
1151 if (fd == FAKEDEV_FB0)
1152 return emu_mmap_dev(length, prot, flags, offset + 0x03101000);
1154 if (fd == FAKEDEV_FB1)
1155 return emu_mmap_dev(length, prot, flags, offset + 0x03381000);
1157 err("bad/ni mmap(?, %d, %x, %x, %d, %08x)\n", length, prot, flags, fd, offset);
1161 long emu_do_munmap(void *addr, unsigned int length)
1165 // don't allow to unmap upper mem
1166 if ((u8 *)mmsp2.umem <= p && p < (u8 *)mmsp2.umem + 0x2000000) {
1167 dbg("ignoring munmap: %p %x\n", addr, length);
1174 static void emu_sound_open(int fd)
1178 if (emu_force_snd_frag != 0) {
1179 ret = g_ioctl_raw(fd, SNDCTL_DSP_SETFRAGMENT, &emu_force_snd_frag);
1181 err("snd ioctl SETFRAGMENT %08x: %d\n", emu_force_snd_frag, ret);
1185 static long emu_sound_ioctl(int fd, int request, void *argp)
1190 dbg("snd ioctl(%d, %08x, %p)", fd, request, argp);
1192 dbg_c(" [%d]", *arg);
1196 /* People set strange frag settings on GP2X, which even manage
1197 * to break audio on pandora (causes writes to fail).
1198 * Catch this and set to something that works. */
1200 case SNDCTL_DSP_SETFRAGMENT: {
1201 int bsize, frag, frag_cnt;
1207 frag = *arg & 0xffff;
1208 frag_cnt = *arg >> 16;
1209 bsize = frag_cnt << frag;
1210 if (frag < 8 || bsize < 4096*4 || bsize > 4096*4*2) {
1212 * ~4ms. gpSP wants small buffers or else it stutters
1213 * because of it's audio thread sync stuff
1214 * XXX: hardcoding, as low samplerates will result in small fragment size,
1215 * which itself causes ALSA stall and hangs the program.
1216 * Also some apps change samplerate without reopening /dev/dsp,
1217 * which causes ALSA to reject SNDCTL_DSP_SETFRAGMENT.
1219 bsize = 44100 / 250 * 4;
1221 for (frag = 0; bsize; bsize >>= 1, frag++)
1227 frag |= frag_cnt << 16;
1228 ret = g_ioctl_raw(fd, SNDCTL_DSP_SETFRAGMENT, &frag);
1230 err("snd ioctl SETFRAGMENT %08x: %ld\n", frag, ret);
1231 // indicate success even if we fail (because of ALSA mostly),
1232 // things like MikMod will bail out otherwise.
1235 case SNDCTL_DSP_SYNC:
1236 // Franxis tends to use sync/write loops, bad idea under ALSA
1242 return g_ioctl_raw(fd, request, argp);
1245 long emu_do_ioctl(int fd, int request, void *argp)
1247 if (fd == emu_interesting_fds[IFD_SOUND].fd)
1248 return emu_sound_ioctl(fd, request, argp);
1251 /* *********************** */
1258 case FBIOGET_FSCREENINFO: {
1259 struct fb_fix_screeninfo *fix = argp;
1261 memset(fix, 0, sizeof(*fix));
1262 strcpy(fix->id, "mmsp2_RGB0");
1263 fix->type = FB_TYPE_PACKED_PIXELS;
1264 fix->accel = FB_ACCEL_NONE;
1265 fix->visual = FB_VISUAL_TRUECOLOR;
1266 fix->line_length = 320*2;
1267 fix->smem_start = (fd == FAKEDEV_FB0) ? 0x03101000 : 0x03381000;
1268 fix->smem_len = 320*240*2;
1271 case FBIOGET_VSCREENINFO: {
1272 struct fb_var_screeninfo *var = argp;
1273 static const struct fb_bitfield fbb_red = { offset: 11, length: 5, };
1274 static const struct fb_bitfield fbb_green = { offset: 5, length: 6, };
1275 static const struct fb_bitfield fbb_blue = { offset: 0, length: 5, };
1277 memset(var, 0, sizeof(*var));
1278 var->activate = FB_ACTIVATE_NOW;
1280 var->xres_virtual = 320;
1282 var->yres_virtual = 240;
1285 var->vmode = FB_VMODE_NONINTERLACED;
1286 var->bits_per_pixel = 16;
1288 var->green = fbb_green;
1289 var->blue = fbb_blue;
1292 case FBIOPUT_VSCREENINFO: {
1293 struct fb_var_screeninfo *var = argp;
1294 dbg(" put vscreen: %dx%d@%d\n", var->xres, var->yres, var->bits_per_pixel);
1295 if (var->xres != 320 || var->yres != 240 || var->bits_per_pixel != 16)
1301 /* *********************** */
1304 // fake tty0 to make GPH SDL happy
1305 if (request == 0x4b46) // KDGKBENT
1311 err("bad/ni ioctl(%d, %08x, %p)\n", fd, request, argp);
1315 static const char wm97xx_p[] =
1316 "5507 0 -831476 0 -4218 16450692 65536"; // from 4.0 fw
1318 long emu_do_read(int fd, void *buf, int count)
1320 int ret, pressed = 0, x, y;
1326 err("read(%d, %d)\n", fd, count);
1332 mmsp2.btn_state = host_read_btns();
1336 memcpy(buf, &mmsp2.btn_state, count);
1338 case FAKEDEV_WM97XX:
1339 ret = host_read_ts(&pressed, &x, &y);
1340 if (ret == 0 && pressed) {
1341 wm97xx.pressure = 0x8001; // TODO: check the real thing
1342 wm97xx.x = x * 3750 / 1024 + 200;
1343 wm97xx.y = 3750 - y * 3750 / 1024 + 200;
1346 wm97xx.pressure = 0;
1347 wm97xx.x = wm97xx.y = 200;
1350 if (count > sizeof(wm97xx))
1351 count = sizeof(wm97xx);
1352 memcpy(buf, &wm97xx, count);
1354 case FAKEDEV_WM97XX_P:
1355 if (count < sizeof(wm97xx_p))
1356 err("incomplete pointercal read\n");
1357 strncpy(buf, wm97xx_p, count);
1360 dbg("read(%d, %d)\n", fd, count);
1366 struct dev_fd_t emu_interesting_fds[] = {
1367 [IFD_SOUND] = { "/dev/dsp", -1, emu_sound_open },
1371 static const struct {
1375 { "/mnt/tmp", "./tmp" },
1376 { "/mnt/sd", "./mntsd" },
1379 const char *emu_wrap_path(const char *path)
1386 // do only path mapping for now
1387 for (i = 0; i < ARRAY_SIZE(path_map); i++) {
1388 p = strstr(path, path_map[i].from);
1390 size = strlen(path) + strlen(path_map[i].to) + 1;
1391 buff = malloc(size);
1395 strncpy(buff, path, len);
1396 snprintf(buff + len, size - len, "%s%s", path_map[i].to,
1397 path + len + strlen(path_map[i].from));
1398 dbg("mapped path \"%s\" -> \"%s\"\n", path, buff);
1400 ret = g_mkdir_raw(path_map[i].to, 0666);
1401 if (ret != 0 && ret != -EEXIST)
1402 err("mkdir(%s): %ld\n", path_map[i].to, ret);
1411 void emu_wrap_path_free(const char *w_path, const char *old_path)
1413 if (w_path != old_path)
1414 free((void *)w_path);
1417 void *emu_do_fopen(const char *path, const char *mode)
1422 if (strcmp(path, "/etc/pointercal") == 0) {
1423 // use local pontercal, not host's
1424 ret = fopen("pointercal", mode);
1426 ret = fopen("pointercal", "w");
1428 fwrite(wm97xx_p, 1, sizeof(wm97xx_p), ret);
1431 ret = fopen("pointercal", mode);
1435 w_path = emu_wrap_path(path);
1436 ret = fopen(w_path, mode);
1437 emu_wrap_path_free(w_path, path);
1444 int emu_do_system(const char *command)
1446 static char tmp_path[512];
1452 if (command == NULL)
1455 for (p2 = command; *p2 && isspace(*p2); p2++)
1458 if (*p2 == '.') // relative path?
1460 else if (*p2 == '/' && strncmp(p2, "/bin", 4) && strncmp(p2, "/lib", 4)
1461 && strncmp(p2, "/sbin", 4) && strncmp(p2, "/usr", 4))
1462 // absolute path, but not a system command
1465 p2 = emu_wrap_path(command);
1467 make_local_path(tmp_path, sizeof(tmp_path), "ginge_prep");
1468 p = tmp_path + strlen(tmp_path);
1470 snprintf(p, sizeof(tmp_path) - (p - tmp_path), " --nomenu %s", p2);
1473 snprintf(tmp_path, sizeof(tmp_path), "%s", p2);
1474 emu_wrap_path_free(p2, command);
1476 dbg("system: \"%s\"\n", tmp_path);
1478 // the app might want the screen too..
1480 ret = system(tmp_path);
1485 long emu_do_execve(const char *filename, char * const argv[],
1486 char * const envp[])
1488 const char **new_argv;
1493 if (filename == NULL)
1496 if (strstr(filename, "gp2xmenu") != NULL)
1497 host_forced_exit(0);
1499 for (i = 0; argv[i] != NULL; i++)
1503 new_argv = calloc(argc + 2, sizeof(new_argv[0]));
1504 if (new_argv == NULL)
1507 prep_path = malloc(512);
1508 if (prep_path == NULL)
1511 make_local_path(prep_path, 512, "ginge_prep");
1512 new_argv[0] = prep_path;
1513 new_argv[1] = "--nomenu";
1514 new_argv[2] = emu_wrap_path(filename);
1516 if (argv[0] != NULL)
1517 for (i = 1; argv[i] != NULL; i++)
1518 new_argv[i + 2] = argv[i];
1520 dbg("execve \"%s\" %s \"%s\"\n", new_argv[0], new_argv[1], new_argv[2]);
1521 ret = execve(new_argv[0], (char **)new_argv, envp);
1522 err("execve(%s): %ld\n", new_argv[0], ret);
1526 // vim:shiftwidth=2:expandtab