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;
102 #define SRCCTRL_INVIDEO (1 << 8)
103 #define SRCCTRL_SRCENB (1 << 7)
104 #define CTRL_TRANSPARENCYENB (1 << 11)
110 u32 mlc_stl_adr; // mlcaddress for pollux
118 u16 mlc_stl_pallt_d[256*2];
119 u32 mlc_stl_pallt_d32[256];
129 u32 btn_state; // as seen through /dev/GPIO: 0PVdVu YXBA RLSeSt 0Ri0Dn 0Le0Up
137 #define pollux mmsp2 // so that code doesn't look that weird
140 DIRTY_PAL_POLLUX = 2,
144 #if defined(LOG_IO) || defined(LOG_IO_UNK)
145 static void log_io(const char *pfx, u32 a, u32 d, int size)
147 const char *fmt, *reg = "";
149 case 8: fmt = "%s %08x %02x %s\n"; d &= 0xff; break;
150 case 32: fmt = "%s %08x %08x %s\n"; break;
151 default: fmt = "%s %08x %04x %s\n"; d &= 0xffff; break;
154 if ((a & ~0xffff) == 0x7f000000)
155 reg = regnames[a & 0xffff];
157 g_printf(fmt, pfx, a, d, reg);
161 static void memset16(void *dst, u32 pattern, int count)
166 d = (u16 *)((long)dst & ~1);
172 pattern |= pattern << 16;
179 *(u16 *)dl = pattern;
182 static void blt_tr(void *dst, void *src, u32 trc, int w)
184 u16 *d = (u16 *)((long)dst & ~1);
185 u16 *s = (u16 *)((long)src & ~1);
188 for (; w > 0; d++, s++, w--)
193 #define dump_blitter() \
195 u32 *r = &blitter.dstctrl; \
197 for (i = 0; i < 4*4; i++, r++) { \
198 g_printf("%08x ", *r); \
204 static void *uppermem_lookup(u32 addr, u8 **mem_end)
206 // XXX: maybe support mirroring?
207 if ((addr & 0xfe000000) != 0x02000000)
210 *mem_end = (u8 *)mmsp2.umem + 0x02000000;
211 return (u8 *)mmsp2.umem - 0x02000000 + addr;
214 static void blitter_do(void)
216 u8 *dst, *dste, *src = NULL, *srce = NULL;
217 int w, h, sstrd, dstrd;
221 w = blitter.size & 0x7ff;
222 h = (blitter.size >> 16) & 0x7ff;
223 sstrd = blitter.srcstride;
224 dstrd = blitter.dststride;
226 // XXX: need to confirm this..
227 addr = (blitter.dstaddr & ~3) | ((blitter.dstctrl & 0x1f) >> 3);
229 // use dst bpp.. How does it do blits with different src bpp?
230 bpp = (blitter.dstctrl & 0x20) ? 16 : 8;
233 if (((w == 320 && h == 240) || // blit whole screen
234 (w * h >= 320*240/2)) && // ..or at least half of the area
235 mmsp2.mlc_stl_adr <= addr && addr < mmsp2.mlc_stl_adr + 320*240*2)
238 dst = uppermem_lookup(addr, &dste);
240 // XXX: assume fill if no SRCENB, but it could be pattern blit..
241 if (blitter.srcctrl & SRCCTRL_SRCENB) {
242 if (!(blitter.srcctrl & SRCCTRL_INVIDEO))
245 addr = (blitter.srcaddr & ~3) | ((blitter.srcctrl & 0x1f) >> 3);
246 src = uppermem_lookup(addr, &srce);
250 if (src + sstrd * h > srce) {
251 err("blit %08x->%08x %dx%d did not fit src\n",
252 blitter.srcaddr, blitter.dstaddr, w, h);
253 h = (srce - src) / sstrd;
260 if (dst + dstrd * h > dste) {
261 err("blit %08x->%08x %dx%d did not fit dst\n",
262 blitter.srcaddr, blitter.dstaddr, w, h);
263 h = (dste - dst) / dstrd;
268 if (bpp == 16 && (blitter.ctrl & CTRL_TRANSPARENCYENB)) {
269 u32 trc = blitter.ctrl >> 16;
270 for (; h > 0; h--, dst += dstrd, src += sstrd)
271 blt_tr(dst, src, trc, w);
274 for (; h > 0; h--, dst += dstrd, src += sstrd)
275 memcpy(dst, src, w * bpp / 8);
279 // fill. Assume the pattern is cleared and bg color is used
280 u32 bgc = blitter.patbackcolor & 0xffff;
282 for (; h > 0; h--, dst += dstrd)
283 memset16(dst, bgc, w);
286 for (; h > 0; h--, dst += dstrd)
287 memset(dst, bgc, w); // bgc?
292 fb_sync_thread_futex = 1;
293 g_futex_raw(&fb_sync_thread_futex, FUTEX_WAKE, 1, NULL);
298 err("blit %08x->%08x %dx%d translated to %p->%p\n",
299 blitter.srcaddr, blitter.dstaddr, w, h, src, dst);
303 // FIXME: pass real dimensions to blitters
304 static void mlc_flip(void *src, int bpp, int stride)
308 // only pass pal to host if it's dirty
309 if (bpp <= 8 && mmsp2.v.dirty_pal) {
310 if (mmsp2.v.dirty_pal == DIRTY_PAL_MMSP2)
311 host_video_update_pal32(mmsp2.mlc_stl_pallt_d32);
313 host_video_update_pal16(mmsp2.mlcpalette);
314 mmsp2.v.dirty_pal = 0;
317 if (bpp != old_bpp) {
318 host_video_change_bpp(bpp);
324 host_video_blit4(src, 320, 240, stride);
328 host_video_blit8(src, 320, 240, stride);
332 host_video_blit16(src, 320, 240, stride);
341 static void *fb_sync_thread(void *arg)
343 unsigned long sigmask[2] = { ~0ul, ~0ul };
344 struct timespec ts = { 0, 0 };
345 int invalid_fb_addr = 1;
346 int manual_refresh = 0;
347 int frame_counter = 0;
350 // this thread can't run any signal handlers since the
351 // app's stack/tls stuff will never be set up here
352 sigmask[0] &= ~(1ul << (SIGSEGV - 1));
353 g_rt_sigprocmask_raw(SIG_SETMASK, sigmask, NULL, sizeof(sigmask));
355 //ret = setpriority(PRIO_PROCESS, 0, -1);
356 //log("setpriority %d\n", ret);
358 // tell the main thread we're done init
359 fb_sync_thread_futex = 0;
360 g_futex_raw(&fb_sync_thread_futex, FUTEX_WAKE, 1, NULL);
363 u8 *gp2x_fb, *gp2x_fb_end;
365 wait_ret = g_futex_raw(&fb_sync_thread_futex, FUTEX_WAIT, 0, &ts);
367 // this is supposed to be done atomically, but to make life
368 // easier ignore it for now, race impact is low anyway
369 fb_sync_thread_futex = 0;
371 if (wait_ret != 0 && wait_ret != -EWOULDBLOCK
372 && wait_ret != -ETIMEDOUT)
374 err("fb_thread: futex error: %d\n", wait_ret);
378 if (fb_sync_thread_paused) {
379 ts.tv_nsec = 100000000;
384 ts.tv_nsec = 50000000;
386 if (manual_refresh == 2)
387 dbg("fb_thread: switch to manual refresh\n");
389 ts.tv_nsec = 16666667;
390 if (manual_refresh > 1)
391 dbg("fb_thread: switch to auto refresh\n");
395 gp2x_fb = uppermem_lookup(mmsp2.mlc_stl_adr, &gp2x_fb_end);
396 if (gp2x_fb == NULL || gp2x_fb + 320*240 * mmsp2.v.bpp / 8 > gp2x_fb_end) {
397 if (!invalid_fb_addr) {
398 err("fb_thread: %08x is out of range\n", mmsp2.mlc_stl_adr);
405 mlc_flip(gp2x_fb, mmsp2.v.bpp, mmsp2.v.stride);
408 if (frame_counter & 0x0f)
412 // this is to check for kill key, in case main thread hung
413 // or something else went wrong.
414 pollux.btn_state = host_read_btns();
418 static void fb_thread_pause(void)
420 fb_sync_thread_paused = 1;
421 // wait until it finishes last refresh
422 // that it might be doing now
426 static void fb_thread_resume(void)
428 fb_sync_thread_paused = 0;
431 static u32 xread32_io_cmn(u32 a, u32 *handled)
438 case 0x402c: // MLCVSTRIDE0
439 case 0x4060: // MLCVSTRIDE1
442 case 0x4038: // MLCADDRESS0
443 case 0x406c: // MLCADDRESS1
444 d = pollux.mlc_stl_adr;
447 // ???? ???? YXBA DURiLe ???? VdVuMS LR?? ????
448 // | GPIOC[31:16] | GPIOB[31:16] |
449 case 0xa058: // GPIOBPAD
450 d = (pollux.btn_state >> 1) & 0x0100;
451 d |= (pollux.btn_state << 1) & 0x0200;
452 d |= (pollux.btn_state >> 3) & 0x0080;
453 d |= (pollux.btn_state >> 5) & 0x0040;
454 d |= (pollux.btn_state >> 6) & 0x0c00;
458 case 0xa098: // GPIOCPAD
459 pollux.btn_state = host_read_btns();
460 d = (pollux.btn_state >> 8) & 0x00f0;
461 d |= (pollux.btn_state >> 1) & 0x0008;
462 d |= (pollux.btn_state << 2) & 0x0004;
463 d |= (pollux.btn_state >> 5) & 0x0002;
464 d |= (pollux.btn_state >> 2) & 0x0001;
476 static u32 xread8(u32 a)
478 iolog("r8 ", a, 0, 8);
479 iolog_unh("r8 ", a, 0, 8);
483 static u32 xread16(u32 a)
485 static u32 fudge, old_a;
488 if ((a & 0xffff0000) == 0x7f000000) {
496 // 0000 P000 VuVd00 0000 YXBA RLSeSt 0Ri0D 0Le0U
497 // | GPIOD |GPIOC[8:15]|GPIOM[0:7] |
500 case 0x1184: // GPIOC
501 d = ~mmsp2.btn_state & 0xff00;
504 case 0x1186: // GPIOD
505 t = ~mmsp2.btn_state;
506 d = (t >> 9) & 0x0080;
507 d |= (t >> 11) & 0x0040;
508 d |= (t >> 7) & 0x0800;
511 case 0x1198: // GPIOM
512 mmsp2.btn_state = host_read_btns();
513 d = ~mmsp2.btn_state & 0xff;
516 case 0x1836: // reserved
519 case 0x2816: // DPC_X_MAX
522 case 0x2818: // DPC_Y_MAX
526 d = mmsp2.mlc_stl_cntl;
530 d = mmsp2.mlc_stl_adrl;
534 d = mmsp2.mlc_stl_adrh;
537 d = mmsp2.mlc_stl_pallt_a;
541 d = xread32_io_cmn(a_, &t);
557 iolog_unh("r16", a, d & 0xffff, 16);
561 iolog("r16", a, d, 16);
565 static u32 xread32(u32 a)
568 if ((a & 0xfff00000) == 0x7f000000) {
575 case 0x0a00: // TCOUNT, 1/7372800s
576 g_clock_gettime_raw(CLOCK_REALTIME, &ts);
577 t64 = (u64)ts.tv_sec * 1000000000 + ts.tv_nsec;
578 // t * 7372800.0 / 1000000000 * 0x100000000 ~= t * 31665935
584 d = xread32_io_cmn(a_, &t);
591 if ((a & 0xfff00000) == 0x7f100000) {
592 u32 *bl = &blitter.dstctrl;
603 iolog_unh("r32", a, d, 32);
606 iolog("r32", a, d, 32);
610 static void xwrite8(u32 a, u32 d)
612 iolog("w8 ", a, d, 8);
613 iolog_unh("w8 ", a, d, 8);
616 static void xwrite16(u32 a, u32 d)
618 iolog("w16", a, d, 16);
619 if ((a & 0xfff00000) == 0x7f000000) {
624 mmsp2.mlc_stl_cntl = d | 0xaa;
626 mmsp2.v.bpp = mode ? mode * 8 : 4;
634 // odd addresses don't affect LCD. What about TV?
637 mmsp2.mlc_stl_adrl = d;
640 mmsp2.mlc_stl_adrh = d;
641 if (mmsp2.mlc_stl_adr != mmsp2.old_mlc_stl_adr) {
643 fb_sync_thread_futex = 1;
644 g_futex_raw(&fb_sync_thread_futex, FUTEX_WAKE, 1, NULL);
646 mmsp2.old_mlc_stl_adr = mmsp2.mlc_stl_adr;
648 case 0x2958: // MLC_STL_PALLT_A
649 mmsp2.mlc_stl_pallt_a = d & 0x1ff;
651 case 0x295a: // MLC_STL_PALLT_D
652 mmsp2.mlc_stl_pallt_d[mmsp2.mlc_stl_pallt_a++] = d;
653 mmsp2.mlc_stl_pallt_a &= 0x1ff;
654 mmsp2.v.dirty_pal = DIRTY_PAL_MMSP2;
658 iolog_unh("w16", a, d, 16);
661 static void xwrite32(u32 a, u32 d)
663 iolog("w32", a, d, 32);
665 if ((a & 0xfff00000) == 0x7f000000) {
669 case 0x295a: // MLC_STL_PALLT_D
670 // special unaligned 32bit write, allegro seems to rely on it
671 mmsp2.mlc_stl_pallt_d[mmsp2.mlc_stl_pallt_a++ & 0x1ff] = d;
672 mmsp2.mlc_stl_pallt_d[mmsp2.mlc_stl_pallt_a++ & 0x1ff] = d >> 16;
673 mmsp2.mlc_stl_pallt_a &= 0x1ff;
674 mmsp2.v.dirty_pal = DIRTY_PAL_MMSP2;
677 case 0x4024: // MLCCONTROL0
678 case 0x4058: // MLCCONTROL1
679 pollux.mlccontrol = d;
681 return; // layer not enabled
682 if ((d >> 16) == 0x443A)
687 case 0x402c: // MLCVSTRIDE0
688 case 0x4060: // MLCVSTRIDE1
691 case 0x4038: // MLCADDRESS0
692 case 0x406c: // MLCADDRESS1
693 pollux.mlc_stl_adr = d;
694 if (d != mmsp2.old_mlc_stl_adr) {
696 fb_sync_thread_futex = 1;
697 g_futex_raw(&fb_sync_thread_futex, FUTEX_WAKE, 1, NULL);
699 mmsp2.old_mlc_stl_adr = d;
701 case 0x403c: // MLCPALETTE0
702 case 0x4070: // MLCPALETTE1
703 pollux.mlcpalette[d >> 24] = d;
704 pollux.v.dirty_pal = DIRTY_PAL_POLLUX;
708 if ((a & 0xfff00000) == 0x7f100000) {
709 u32 *bl = &blitter.dstctrl;
713 if (a_ == 0x34 && (d & 1))
718 iolog_unh("w32", a, d, 32);
721 #define LINKPAGE_SIZE 0x1000
722 #define LINKPAGE_COUNT 4
723 #define LINKPAGE_ALLOC (LINKPAGE_SIZE * LINKPAGE_COUNT)
733 void (*handler)(struct op_context *op_ctx);
737 struct op_stackframe {
742 static struct op_linkpage *g_linkpages[2];
743 static int g_linkpage_count;
746 C_EQ, C_NE, C_CS, C_CC, C_MI, C_PL, C_VS, C_VC,
747 C_HI, C_LS, C_GE, C_LT, C_GT, C_LE, C_AL,
756 #define BIT_SET(v, b) (v & (1 << (b)))
758 void emu_handle_op(struct op_context *op_ctx, struct op_stackframe *sframe)
760 u32 *regs = sframe->saved_regs;
761 u32 cpsr = sframe->cpsr;
763 u32 t, shift, ret, addr;
766 cond = (op & 0xf0000000) >> 28;
767 rd = (op & 0x0000f000) >> 12;
768 rn = (op & 0x000f0000) >> 16;
772 case C_EQ: if ( (cpsr & CPSR_Z)) break; return;
773 case C_NE: if (!(cpsr & CPSR_Z)) break; return;
774 case C_CS: if ( (cpsr & CPSR_C)) break; return;
775 case C_CC: if (!(cpsr & CPSR_C)) break; return;
776 case C_MI: if ( (cpsr & CPSR_N)) break; return;
777 case C_PL: if (!(cpsr & CPSR_N)) break; return;
778 case C_VS: if ( (cpsr & CPSR_V)) break; return;
779 case C_VC: if (!(cpsr & CPSR_V)) break; return;
785 if ((op & 0x0f200090) == 0x01000090) { // AM3: LDRH, STRH
786 if (!BIT_SET(op, 5)) // !H
788 if (BIT_SET(op, 6) && !BIT_SET(op, 20)) // S && !L
791 if (BIT_SET(op, 22)) // imm offset
792 t = ((op & 0xf00) >> 4) | (op & 0x0f);
794 t = regs[op & 0x000f];
796 if (!BIT_SET(op, 23))
800 if (BIT_SET(op, 20)) { // Load
802 if (BIT_SET(op, 6)) { // S
804 ret = (signed int)ret >> 16;
809 xwrite16(addr, regs[rd]);
811 else if ((op & 0x0c000000) == 0x04000000) { // load/store word/byte
813 goto unhandled; // unprivileged
814 if (BIT_SET(op, 25)) { // reg offs
816 goto unhandled; // nah it's media
818 t = regs[op & 0x000f];
819 shift = (op & 0x0f80) >> 7;
820 switch ((op & 0x0060) >> 5) {
821 case 0: t = t << shift; break;
822 case 1: t = t >> (shift + 1); break;
823 case 2: t = (signed int)t >> (shift + 1); break;
824 case 3: goto unhandled; // I'm just lazy
830 if (!BIT_SET(op, 23))
834 if (BIT_SET(op, 24)) // pre-indexed
836 if (!BIT_SET(op, 24) || BIT_SET(op, 21))
837 regs[rn] += t; // writeback
839 if (BIT_SET(op, 20)) { // Load
840 if (BIT_SET(op, 22)) // Byte
847 if (BIT_SET(op, 22)) // Byte
848 xwrite8(addr, regs[rd]);
850 xwrite32(addr, regs[rd]);
857 if (addr != addr_check) {
858 fprintf(stderr, "bad calculated addr: %08x vs %08x\n", addr, addr_check);
865 err("unhandled IO op %08x @ %08x\n", op, op_ctx->pc);
866 for (i = 0; i < 8-1; i++)
867 err(" r%d=%08x r%-2d=%08x\n", i, regs[i], i+8, regs[i+8]);
868 err(" r%d=%08x cpsr=%08x\n", i, regs[i], cpsr);
872 static u32 make_offset12(u32 *pc, u32 *target)
876 lp_offs = (char *)target - (char *)pc - 2*4;
881 if (lp_offs >= LINKPAGE_SIZE) {
882 err("linkpage too far: %d\n", lp_offs);
886 return (u << 23) | lp_offs;
889 static u32 make_jmp(u32 *pc, u32 *target, int bl)
893 jmp_val = target - pc - 2;
894 if (jmp_val < (int)0xff800000 || jmp_val > 0x007fffff) {
895 err("jump out of range (%p -> %p)\n", pc, target);
899 return 0xea000000 | (bl << 24) | (jmp_val & 0x00ffffff);
902 static void emit_op(struct op_linkpage *linkpage, u32 op)
904 *linkpage->code_ptr++ = op;
907 static void emit_op_io(struct op_linkpage *linkpage,
910 op |= make_offset12(linkpage->code_ptr, target);
911 emit_op(linkpage, op);
914 static void init_linkpage(struct op_linkpage *linkpage)
916 linkpage->handler = emu_call_handle_op;
917 linkpage->code_ptr = linkpage->code;
920 static void segv_sigaction(int num, siginfo_t *info, void *ctx)
922 extern char _init, _end;
923 struct ucontext *context = ctx;
924 u32 *regs = (u32 *)&context->uc_mcontext.arm_r0;
925 u32 *pc = (u32 *)regs[15];
926 u32 self_start, self_end;
927 struct op_linkpage *lp = NULL;
928 struct op_context *op_ctx;
929 int i, ret, lp_i, lp_size;
931 self_start = (u32)&_init & ~0xfff;
932 self_end = (u32)&_end;
934 if ((self_start <= regs[15] && regs[15] <= self_end) || // PC is in our segment or
935 !((regs[15] ^ (u32)g_linkpages[0]) & ~(LINKPAGE_ALLOC - 1)) || // .. in linkpage
936 ((long)info->si_addr & 0xffe00000) != 0x7f000000) // faulting not where expected
938 // real crash - time to die
939 err("segv %d %p @ %08x\n", info->si_code, info->si_addr, regs[15]);
940 for (i = 0; i < 8; i++)
941 dbg(" r%d=%08x r%-2d=%08x\n", i, regs[i], i+8, regs[i+8]);
942 signal(num, SIG_DFL);
946 segvlog("segv %d %p @ %08x\n", info->si_code, info->si_addr, regs[15]);
948 // find nearby linkpage
949 for (lp_i = 0; lp_i < ARRAY_SIZE(g_linkpages); lp_i++) {
950 if (g_linkpages[lp_i] == NULL)
952 i = g_linkpages[lp_i]->code_ptr + 2 - pc - 2;
953 if ((int)0xff800000 <= i && i <= 0x007fffff) {
954 lp = g_linkpages[lp_i];
960 err("fatal: no nearby linkpage for %08x\n", regs[15]);
965 ret = mprotect((void *)((long)pc & ~0xfff), 0x1000, PROT_READ|PROT_WRITE|PROT_EXEC);
967 perror("warning: mprotect");
971 op_ctx = (void *)lp->code_ptr;
972 op_ctx->pc = (u32)pc;
974 lp->code_ptr = &op_ctx->code[0];
976 // emit jump to code ptr
977 *pc = make_jmp(pc, lp->code_ptr, 0);
980 emit_op (lp, 0xe50d0000 + 0xf00 - 4 * 0); // str r0, [sp, #(-0xf00 + r0_offs)]
981 emit_op (lp, 0xe50de000 + 0xf00 - 4 * 14); // str lr, [sp, #(-0xf00 + lr_offs)]
982 emit_op (lp, 0xe24f0000 + (lp->code_ptr - (u32 *)op_ctx + 2) * 4); // sub r0, pc, #op_ctx
983 emit_op (lp, 0xe1a0e00f); // mov lr, pc
984 emit_op_io(lp, 0xe51ff000, (u32 *)&lp->handler); // ldr pc, =handle_op
985 emit_op (lp, 0xe51de000 + 0xf00 - 4 * 14); // ldr lr, [sp, #(-0xf00 + lr_offs)]
986 emit_op (lp, make_jmp(lp->code_ptr, pc + 1, 0)); // jmp <back>
989 sys_cacheflush(pc, pc + 1);
990 sys_cacheflush(lp, lp->code_ptr);
992 lp_size = (char *)lp->code_ptr - (char *)lp;
993 segvlog("code #%d %d/%d\n", g_linkpage_count, lp_size, LINKPAGE_SIZE);
995 if (lp_size + 14*4 > LINKPAGE_SIZE) {
997 if (g_linkpage_count >= LINKPAGE_COUNT) {
998 err("too many linkpages needed\n");
1001 g_linkpages[lp_i] = (void *)((char *)g_linkpages[lp_i] + LINKPAGE_SIZE);
1002 init_linkpage(g_linkpages[lp_i]);
1004 //handle_op(regs[15], op, regs, (u32)info->si_addr);
1008 void emu_init(void *map_bottom[2], int is_dl)
1010 sigaction_t segv_action = {
1011 .sa_sigaction = segv_sigaction,
1012 .sa_flags = SA_SIGINFO,
1018 if (geteuid() == 0) {
1019 err("don't try to run as root, device registers or memory "
1020 "might get trashed crashing the OS or even damaging the device.\n");
1027 for (i = 0; i < 2; i++) {
1028 if (map_bottom[i] == NULL)
1030 g_linkpages[i] = (void *)(((u32)map_bottom[i] - LINKPAGE_ALLOC) & ~0xfff);
1031 pret = mmap(g_linkpages[i], LINKPAGE_ALLOC, PROT_READ|PROT_WRITE,
1032 MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED, -1, 0);
1033 if (pret != g_linkpages[i]) {
1034 err("linkpage alloc @ %p: ", g_linkpages[i]);
1038 log("linkpages @ %p\n", g_linkpages[i]);
1039 init_linkpage(g_linkpages[i]);
1045 err("can't init host\n");
1049 ret = host_video_init(NULL, 0);
1051 err("can't init host video\n");
1055 // TODO: check if this really fails on Wiz..
1056 mmsp2.umem = mmap(NULL, 0x2000000, PROT_READ|PROT_WRITE|PROT_EXEC,
1057 MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
1059 if (mmsp2.umem == MAP_FAILED) {
1060 // we are short on memmory on Wiz, need special handling
1061 extern void *host_mmap_upper(void);
1062 mmsp2.umem = host_mmap_upper();
1065 if (mmsp2.umem == MAP_FAILED) {
1066 perror(PFX "mmap upper mem");
1070 pret = mmap(NULL, THREAD_STACK_SIZE, PROT_READ|PROT_WRITE|PROT_EXEC,
1071 MAP_PRIVATE|MAP_ANONYMOUS|MAP_GROWSDOWN, -1, 0);
1072 if (mmsp2.umem == MAP_FAILED) {
1073 perror(PFX "mmap thread stack");
1076 fb_sync_thread_futex = 1;
1077 ret = g_clone(CLONE_VM | CLONE_FS | CLONE_FILES
1078 | CLONE_SIGHAND | CLONE_THREAD,
1079 (char *)pret + THREAD_STACK_SIZE, 0, 0, 0,
1081 if (ret == 0 || ret == -1) {
1082 perror(PFX "start fb thread");
1085 g_futex_raw(&fb_sync_thread_futex, FUTEX_WAIT, 1, NULL);
1088 mmsp2.mlc_stl_adr = 0x03101000; // fb2 is at 0x03381000
1089 mmsp2.mlc_stl_cntl = 0x4ab; // 16bpp, region 1 active
1090 mmsp2.v.width = 320;
1091 mmsp2.v.height = 240;
1092 mmsp2.v.stride = 320*2;
1094 mmsp2.v.dirty_pal = 1;
1096 sigemptyset(&segv_action.sa_mask);
1097 sigaction(SIGSEGV, &segv_action, NULL);
1100 static long emu_mmap_dev(unsigned int length, int prot, int flags, unsigned int offset)
1102 u8 *umem, *umem_end;
1105 if ((offset & ~0x1ffff) == 0xc0000000) {
1106 return g_mmap2_raw((void *)0x7f000000, length, PROT_NONE,
1107 MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED|MAP_NORESERVE, -1, 0);
1110 if ((offset & ~0xffff) == 0xe0020000) {
1111 return g_mmap2_raw((void *)0x7f100000, length, PROT_NONE,
1112 MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED|MAP_NORESERVE, -1, 0);
1115 if ((offset & 0xfe000000) != 0x02000000) {
1116 err("unexpected devmem mmap @ %08x\n", offset);
1120 umem = uppermem_lookup(offset, &umem_end);
1121 if (umem + length > umem_end)
1122 err("warning: uppermem @ %08x overflows by %d bytes\n",
1123 offset, umem + length - umem_end);
1125 dbg("upper mem @ %08x %x = %p\n", offset, length, umem);
1129 long emu_do_mmap(unsigned int length, int prot, int flags, int fd,
1130 unsigned int offset)
1132 if (fd == FAKEDEV_MEM)
1133 return emu_mmap_dev(length, prot, flags, offset);
1135 if (fd == FAKEDEV_FB0)
1136 return emu_mmap_dev(length, prot, flags, offset + 0x03101000);
1138 if (fd == FAKEDEV_FB1)
1139 return emu_mmap_dev(length, prot, flags, offset + 0x03381000);
1141 err("bad/ni mmap(?, %d, %x, %x, %d, %08x)\n", length, prot, flags, fd, offset);
1145 long emu_do_munmap(void *addr, unsigned int length)
1149 // don't allow to unmap upper mem
1150 if ((u8 *)mmsp2.umem <= p && p < (u8 *)mmsp2.umem + 0x2000000) {
1151 dbg("ignoring munmap: %p %x\n", addr, length);
1158 static void emu_sound_open(int fd)
1163 // set default buffer size to 16 * 1K
1164 frag = (16<<16) | 10; // 16K
1165 ret = g_ioctl_raw(fd, SNDCTL_DSP_SETFRAGMENT, &frag);
1167 err("snd ioctl SETFRAGMENT %08x: %d\n", frag, ret);
1171 static long emu_sound_ioctl(int fd, int request, void *argp)
1176 dbg("snd ioctl(%d, %08x, %p)", fd, request, argp);
1178 dbg_c(" [%d]", *arg);
1182 /* People set strange frag settings on GP2X, which even manage
1183 * to break audio on pandora (causes writes to fail).
1184 * Catch this and set to something that works. */
1186 case SNDCTL_DSP_SETFRAGMENT: {
1187 int bsize, frag, frag_cnt;
1193 frag = *arg & 0xffff;
1194 frag_cnt = *arg >> 16;
1195 bsize = frag_cnt << frag;
1196 if (frag < 10 || bsize < 4096*4 || bsize > 4096*4*2) {
1198 * ~4ms. gpSP wants small buffers or else it stutters
1199 * because of it's audio thread sync stuff
1200 * XXX: hardcoding, as low samplerates will result in small fragment size,
1201 * which itself causes ALSA stall and hangs the program.
1202 * Also some apps change samplerate without reopening /dev/dsp,
1203 * which causes ALSA to reject SNDCTL_DSP_SETFRAGMENT.
1205 bsize = 44100 / 250 * 4;
1207 for (frag = 0; bsize; bsize >>= 1, frag++)
1213 frag |= frag_cnt << 16;
1214 ret = g_ioctl_raw(fd, SNDCTL_DSP_SETFRAGMENT, &frag);
1216 err("snd ioctl SETFRAGMENT %08x: %ld\n", frag, ret);
1217 // indicate success even if we fail (because of ALSA mostly),
1218 // things like MikMod will bail out otherwise.
1221 case SNDCTL_DSP_SYNC:
1222 // Franxis tends to use sync/write loops, bad idea under ALSA
1228 return g_ioctl_raw(fd, request, argp);
1231 long emu_do_ioctl(int fd, int request, void *argp)
1233 if (fd == emu_interesting_fds[IFD_SOUND].fd)
1234 return emu_sound_ioctl(fd, request, argp);
1237 /* *********************** */
1244 case FBIOGET_FSCREENINFO: {
1245 struct fb_fix_screeninfo *fix = argp;
1247 memset(fix, 0, sizeof(*fix));
1248 strcpy(fix->id, "mmsp2_RGB0");
1249 fix->type = FB_TYPE_PACKED_PIXELS;
1250 fix->accel = FB_ACCEL_NONE;
1251 fix->visual = FB_VISUAL_TRUECOLOR;
1252 fix->line_length = 320*2;
1253 fix->smem_start = (fd == FAKEDEV_FB0) ? 0x03101000 : 0x03381000;
1254 fix->smem_len = 320*240*2;
1257 case FBIOGET_VSCREENINFO: {
1258 struct fb_var_screeninfo *var = argp;
1259 static const struct fb_bitfield fbb_red = { offset: 11, length: 5, };
1260 static const struct fb_bitfield fbb_green = { offset: 5, length: 6, };
1261 static const struct fb_bitfield fbb_blue = { offset: 0, length: 5, };
1263 memset(var, 0, sizeof(*var));
1264 var->activate = FB_ACTIVATE_NOW;
1266 var->xres_virtual = 320;
1268 var->yres_virtual = 240;
1271 var->vmode = FB_VMODE_NONINTERLACED;
1272 var->bits_per_pixel = 16;
1274 var->green = fbb_green;
1275 var->blue = fbb_blue;
1278 case FBIOPUT_VSCREENINFO: {
1279 struct fb_var_screeninfo *var = argp;
1280 dbg(" put vscreen: %dx%d@%d\n", var->xres, var->yres, var->bits_per_pixel);
1281 if (var->xres != 320 || var->yres != 240 || var->bits_per_pixel != 16)
1287 /* *********************** */
1289 // fake tty0 to make GPH SDL happy
1290 if (request == 0x4b46) // KDGKBENT
1296 err("bad/ni ioctl(%d, %08x, %p)\n", fd, request, argp);
1300 static const char wm97xx_p[] =
1301 "5507 0 -831476 0 -4218 16450692 65536"; // from 4.0 fw
1303 long emu_do_read(int fd, void *buf, int count)
1305 int ret, pressed = 0, x, y;
1311 err("read(%d, %d)\n", fd, count);
1317 mmsp2.btn_state = host_read_btns();
1321 memcpy(buf, &mmsp2.btn_state, count);
1323 case FAKEDEV_WM97XX:
1324 ret = host_read_ts(&pressed, &x, &y);
1325 if (ret == 0 && pressed) {
1326 wm97xx.pressure = 0x8001; // TODO: check the real thing
1327 wm97xx.x = x * 3750 / 1024 + 200;
1328 wm97xx.y = 3750 - y * 3750 / 1024 + 200;
1331 wm97xx.pressure = 0;
1332 wm97xx.x = wm97xx.y = 200;
1335 if (count > sizeof(wm97xx))
1336 count = sizeof(wm97xx);
1337 memcpy(buf, &wm97xx, count);
1339 case FAKEDEV_WM97XX_P:
1340 if (count < sizeof(wm97xx_p))
1341 err("incomplete pointercal read\n");
1342 strncpy(buf, wm97xx_p, count);
1345 dbg("read(%d, %d)\n", fd, count);
1351 struct dev_fd_t emu_interesting_fds[] = {
1352 [IFD_SOUND] = { "/dev/dsp", -1, emu_sound_open },
1356 static const struct {
1360 { "/mnt/tmp", "./tmp" },
1361 { "/mnt/sd", "./mntsd" },
1364 const char *emu_wrap_path(const char *path)
1371 // do only path mapping for now
1372 for (i = 0; i < ARRAY_SIZE(path_map); i++) {
1373 p = strstr(path, path_map[i].from);
1375 size = strlen(path) + strlen(path_map[i].to) + 1;
1376 buff = malloc(size);
1380 strncpy(buff, path, len);
1381 snprintf(buff + len, size - len, "%s%s", path_map[i].to,
1382 path + len + strlen(path_map[i].from));
1383 dbg("mapped path \"%s\" -> \"%s\"\n", path, buff);
1385 ret = g_mkdir_raw(path_map[i].to, 0666);
1386 if (ret != 0 && ret != -EEXIST)
1387 err("mkdir(%s): %ld\n", path_map[i].to, ret);
1396 void emu_wrap_path_free(const char *w_path, const char *old_path)
1398 if (w_path != old_path)
1399 free((void *)w_path);
1402 void *emu_do_fopen(const char *path, const char *mode)
1407 if (strcmp(path, "/etc/pointercal") == 0) {
1408 // use local pontercal, not host's
1409 ret = fopen("pointercal", mode);
1411 ret = fopen("pointercal", "w");
1413 fwrite(wm97xx_p, 1, sizeof(wm97xx_p), ret);
1416 ret = fopen("pointercal", mode);
1420 w_path = emu_wrap_path(path);
1421 ret = fopen(w_path, mode);
1422 emu_wrap_path_free(w_path, path);
1429 int emu_do_system(const char *command)
1431 static char tmp_path[512];
1437 if (command == NULL)
1440 for (p2 = command; *p2 && isspace(*p2); p2++)
1443 if (*p2 == '.') // relative path?
1445 else if (*p2 == '/' && strncmp(p2, "/bin", 4) && strncmp(p2, "/lib", 4)
1446 && strncmp(p2, "/sbin", 4) && strncmp(p2, "/usr", 4))
1447 // absolute path, but not a system command
1450 p2 = emu_wrap_path(command);
1452 make_local_path(tmp_path, sizeof(tmp_path), "ginge_prep");
1453 p = tmp_path + strlen(tmp_path);
1455 snprintf(p, sizeof(tmp_path) - (p - tmp_path), " --nomenu %s", p2);
1458 snprintf(tmp_path, sizeof(tmp_path), "%s", p2);
1459 emu_wrap_path_free(p2, command);
1461 dbg("system: \"%s\"\n", tmp_path);
1463 // the app might want the screen too..
1465 ret = system(tmp_path);
1470 long emu_do_execve(const char *filename, char * const argv[],
1471 char * const envp[])
1473 const char **new_argv;
1478 if (filename == NULL)
1481 if (strstr(filename, "gp2xmenu") != NULL)
1482 host_forced_exit(0);
1484 for (i = 0; argv[i] != NULL; i++)
1488 new_argv = calloc(argc + 2, sizeof(new_argv[0]));
1489 if (new_argv == NULL)
1492 prep_path = malloc(512);
1493 if (prep_path == NULL)
1496 make_local_path(prep_path, 512, "ginge_prep");
1497 new_argv[0] = prep_path;
1498 new_argv[1] = "--nomenu";
1499 new_argv[2] = emu_wrap_path(filename);
1501 if (argv[0] != NULL)
1502 for (i = 1; argv[i] != NULL; i++)
1503 new_argv[i + 2] = argv[i];
1505 dbg("execve \"%s\" %s \"%s\"\n", new_argv[0], new_argv[1], new_argv[2]);
1506 ret = execve(new_argv[0], (char **)new_argv, envp);
1507 err("execve(%s): %ld\n", new_argv[0], ret);
1511 // vim:shiftwidth=2:expandtab