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)
439 case 0x1980: // TIMER3 TMRCOUNT
440 // assume the timer is set up for microsec time
441 g_clock_gettime_raw(CLOCK_REALTIME, &ts);
442 d = ts.tv_sec * 1000000 + ((u64)(u32)ts.tv_nsec * 4294968 >> 32);
444 case 0x402c: // MLCVSTRIDE0
445 case 0x4060: // MLCVSTRIDE1
448 case 0x4038: // MLCADDRESS0
449 case 0x406c: // MLCADDRESS1
450 d = pollux.mlc_stl_adr;
453 // ???? ???? YXBA DURiLe ???? VdVuMS LR?? ????
454 // | GPIOC[31:16] | GPIOB[31:16] |
455 case 0xa058: // GPIOBPAD
456 d = (pollux.btn_state >> 1) & 0x0100;
457 d |= (pollux.btn_state << 1) & 0x0200;
458 d |= (pollux.btn_state >> 3) & 0x0080;
459 d |= (pollux.btn_state >> 5) & 0x0040;
460 d |= (pollux.btn_state >> 6) & 0x0c00;
464 case 0xa098: // GPIOCPAD
465 pollux.btn_state = host_read_btns();
466 d = (pollux.btn_state >> 8) & 0x00f0;
467 d |= (pollux.btn_state >> 1) & 0x0008;
468 d |= (pollux.btn_state << 2) & 0x0004;
469 d |= (pollux.btn_state >> 5) & 0x0002;
470 d |= (pollux.btn_state >> 2) & 0x0001;
482 static u32 xread8(u32 a)
484 iolog("r8 ", a, 0, 8);
485 iolog_unh("r8 ", a, 0, 8);
489 static u32 xread16(u32 a)
491 static u32 fudge, old_a;
494 if ((a & 0xffff0000) == 0x7f000000) {
502 // 0000 P000 VuVd00 0000 YXBA RLSeSt 0Ri0D 0Le0U
503 // | GPIOD |GPIOC[8:15]|GPIOM[0:7] |
506 case 0x1184: // GPIOC
507 d = ~mmsp2.btn_state & 0xff00;
510 case 0x1186: // GPIOD
511 t = ~mmsp2.btn_state;
512 d = (t >> 9) & 0x0080;
513 d |= (t >> 11) & 0x0040;
514 d |= (t >> 7) & 0x0800;
517 case 0x1198: // GPIOM
518 mmsp2.btn_state = host_read_btns();
519 d = ~mmsp2.btn_state & 0xff;
522 case 0x1836: // reserved
525 case 0x2816: // DPC_X_MAX
528 case 0x2818: // DPC_Y_MAX
532 d = mmsp2.mlc_stl_cntl;
536 d = mmsp2.mlc_stl_adrl;
540 d = mmsp2.mlc_stl_adrh;
543 d = mmsp2.mlc_stl_pallt_a;
547 d = xread32_io_cmn(a_, &t);
563 iolog_unh("r16", a, d & 0xffff, 16);
567 iolog("r16", a, d, 16);
571 static u32 xread32(u32 a)
574 if ((a & 0xfff00000) == 0x7f000000) {
581 case 0x0a00: // TCOUNT, 1/7372800s
582 g_clock_gettime_raw(CLOCK_REALTIME, &ts);
583 t64 = (u64)ts.tv_sec * 1000000000 + ts.tv_nsec;
584 // t * 7372800.0 / 1000000000 * 0x100000000 ~= t * 31665935
590 d = xread32_io_cmn(a_, &t);
597 if ((a & 0xfff00000) == 0x7f100000) {
598 u32 *bl = &blitter.dstctrl;
609 iolog_unh("r32", a, d, 32);
612 iolog("r32", a, d, 32);
616 static void xwrite8(u32 a, u32 d)
618 iolog("w8 ", a, d, 8);
619 iolog_unh("w8 ", a, d, 8);
622 static void xwrite16(u32 a, u32 d)
624 iolog("w16", a, d, 16);
625 if ((a & 0xfff00000) == 0x7f000000) {
630 mmsp2.mlc_stl_cntl = d | 0xaa;
632 mmsp2.v.bpp = mode ? mode * 8 : 4;
640 // odd addresses don't affect LCD. What about TV?
643 mmsp2.mlc_stl_adrl = d;
646 mmsp2.mlc_stl_adrh = d;
647 if (mmsp2.mlc_stl_adr != mmsp2.old_mlc_stl_adr) {
649 fb_sync_thread_futex = 1;
650 g_futex_raw(&fb_sync_thread_futex, FUTEX_WAKE, 1, NULL);
652 mmsp2.old_mlc_stl_adr = mmsp2.mlc_stl_adr;
654 case 0x2958: // MLC_STL_PALLT_A
655 mmsp2.mlc_stl_pallt_a = d & 0x1ff;
657 case 0x295a: // MLC_STL_PALLT_D
658 mmsp2.mlc_stl_pallt_d[mmsp2.mlc_stl_pallt_a++] = d;
659 mmsp2.mlc_stl_pallt_a &= 0x1ff;
660 mmsp2.v.dirty_pal = DIRTY_PAL_MMSP2;
664 iolog_unh("w16", a, d, 16);
667 static void xwrite32(u32 a, u32 d)
669 iolog("w32", a, d, 32);
671 if ((a & 0xfff00000) == 0x7f000000) {
675 case 0x295a: // MLC_STL_PALLT_D
676 // special unaligned 32bit write, allegro seems to rely on it
677 mmsp2.mlc_stl_pallt_d[mmsp2.mlc_stl_pallt_a++ & 0x1ff] = d;
678 mmsp2.mlc_stl_pallt_d[mmsp2.mlc_stl_pallt_a++ & 0x1ff] = d >> 16;
679 mmsp2.mlc_stl_pallt_a &= 0x1ff;
680 mmsp2.v.dirty_pal = DIRTY_PAL_MMSP2;
683 case 0x4024: // MLCCONTROL0
684 case 0x4058: // MLCCONTROL1
685 pollux.mlccontrol = d;
687 return; // layer not enabled
688 if ((d >> 16) == 0x443A)
693 case 0x402c: // MLCVSTRIDE0
694 case 0x4060: // MLCVSTRIDE1
697 case 0x4038: // MLCADDRESS0
698 case 0x406c: // MLCADDRESS1
699 pollux.mlc_stl_adr = d;
700 if (d != mmsp2.old_mlc_stl_adr) {
702 fb_sync_thread_futex = 1;
703 g_futex_raw(&fb_sync_thread_futex, FUTEX_WAKE, 1, NULL);
705 mmsp2.old_mlc_stl_adr = d;
707 case 0x403c: // MLCPALETTE0
708 case 0x4070: // MLCPALETTE1
709 pollux.mlcpalette[d >> 24] = d;
710 pollux.v.dirty_pal = DIRTY_PAL_POLLUX;
714 if ((a & 0xfff00000) == 0x7f100000) {
715 u32 *bl = &blitter.dstctrl;
719 if (a_ == 0x34 && (d & 1))
724 iolog_unh("w32", a, d, 32);
727 #define LINKPAGE_SIZE 0x1000
728 #define LINKPAGE_COUNT 4
729 #define LINKPAGE_ALLOC (LINKPAGE_SIZE * LINKPAGE_COUNT)
739 void (*handler)(struct op_context *op_ctx);
743 struct op_stackframe {
748 static struct op_linkpage *g_linkpages[2];
749 static int g_linkpage_count;
752 C_EQ, C_NE, C_CS, C_CC, C_MI, C_PL, C_VS, C_VC,
753 C_HI, C_LS, C_GE, C_LT, C_GT, C_LE, C_AL,
762 #define BIT_SET(v, b) (v & (1 << (b)))
764 void emu_handle_op(struct op_context *op_ctx, struct op_stackframe *sframe)
766 u32 *regs = sframe->saved_regs;
767 u32 cpsr = sframe->cpsr;
769 u32 t, shift, ret, addr;
772 cond = (op & 0xf0000000) >> 28;
773 rd = (op & 0x0000f000) >> 12;
774 rn = (op & 0x000f0000) >> 16;
778 case C_EQ: if ( (cpsr & CPSR_Z)) break; return;
779 case C_NE: if (!(cpsr & CPSR_Z)) break; return;
780 case C_CS: if ( (cpsr & CPSR_C)) break; return;
781 case C_CC: if (!(cpsr & CPSR_C)) break; return;
782 case C_MI: if ( (cpsr & CPSR_N)) break; return;
783 case C_PL: if (!(cpsr & CPSR_N)) break; return;
784 case C_VS: if ( (cpsr & CPSR_V)) break; return;
785 case C_VC: if (!(cpsr & CPSR_V)) break; return;
791 if ((op & 0x0f200090) == 0x01000090) { // AM3: LDRH, STRH
792 if (!BIT_SET(op, 5)) // !H
794 if (BIT_SET(op, 6) && !BIT_SET(op, 20)) // S && !L
797 if (BIT_SET(op, 22)) // imm offset
798 t = ((op & 0xf00) >> 4) | (op & 0x0f);
800 t = regs[op & 0x000f];
802 if (!BIT_SET(op, 23))
806 if (BIT_SET(op, 20)) { // Load
808 if (BIT_SET(op, 6)) { // S
810 ret = (signed int)ret >> 16;
815 xwrite16(addr, regs[rd]);
817 else if ((op & 0x0c000000) == 0x04000000) { // load/store word/byte
819 goto unhandled; // unprivileged
820 if (BIT_SET(op, 25)) { // reg offs
822 goto unhandled; // nah it's media
824 t = regs[op & 0x000f];
825 shift = (op & 0x0f80) >> 7;
826 switch ((op & 0x0060) >> 5) {
827 case 0: t = t << shift; break;
828 case 1: t = t >> (shift + 1); break;
829 case 2: t = (signed int)t >> (shift + 1); break;
830 case 3: goto unhandled; // I'm just lazy
836 if (!BIT_SET(op, 23))
840 if (BIT_SET(op, 24)) // pre-indexed
842 if (!BIT_SET(op, 24) || BIT_SET(op, 21))
843 regs[rn] += t; // writeback
845 if (BIT_SET(op, 20)) { // Load
846 if (BIT_SET(op, 22)) // Byte
853 if (BIT_SET(op, 22)) // Byte
854 xwrite8(addr, regs[rd]);
856 xwrite32(addr, regs[rd]);
863 if (addr != addr_check) {
864 fprintf(stderr, "bad calculated addr: %08x vs %08x\n", addr, addr_check);
871 err("unhandled IO op %08x @ %08x\n", op, op_ctx->pc);
872 for (i = 0; i < 8-1; i++)
873 err(" r%d=%08x r%-2d=%08x\n", i, regs[i], i+8, regs[i+8]);
874 err(" r%d=%08x cpsr=%08x\n", i, regs[i], cpsr);
878 static u32 make_offset12(u32 *pc, u32 *target)
882 lp_offs = (char *)target - (char *)pc - 2*4;
887 if (lp_offs >= LINKPAGE_SIZE) {
888 err("linkpage too far: %d\n", lp_offs);
892 return (u << 23) | lp_offs;
895 static u32 make_jmp(u32 *pc, u32 *target, int bl)
899 jmp_val = target - pc - 2;
900 if (jmp_val < (int)0xff800000 || jmp_val > 0x007fffff) {
901 err("jump out of range (%p -> %p)\n", pc, target);
905 return 0xea000000 | (bl << 24) | (jmp_val & 0x00ffffff);
908 static void emit_op(struct op_linkpage *linkpage, u32 op)
910 *linkpage->code_ptr++ = op;
913 static void emit_op_io(struct op_linkpage *linkpage,
916 op |= make_offset12(linkpage->code_ptr, target);
917 emit_op(linkpage, op);
920 static void init_linkpage(struct op_linkpage *linkpage)
922 linkpage->handler = emu_call_handle_op;
923 linkpage->code_ptr = linkpage->code;
926 static void segv_sigaction(int num, siginfo_t *info, void *ctx)
928 extern char _init, _end;
929 struct ucontext *context = ctx;
930 u32 *regs = (u32 *)&context->uc_mcontext.arm_r0;
931 u32 *pc = (u32 *)regs[15];
932 u32 self_start, self_end;
933 struct op_linkpage *lp = NULL;
934 struct op_context *op_ctx;
935 int i, ret, lp_i, lp_size;
937 self_start = (u32)&_init & ~0xfff;
938 self_end = (u32)&_end;
940 if ((self_start <= regs[15] && regs[15] <= self_end) || // PC is in our segment or
941 !((regs[15] ^ (u32)g_linkpages[0]) & ~(LINKPAGE_ALLOC - 1)) || // .. in linkpage
942 ((long)info->si_addr & 0xffe00000) != 0x7f000000) // faulting not where expected
944 // real crash - time to die
945 err("segv %d %p @ %08x\n", info->si_code, info->si_addr, regs[15]);
946 for (i = 0; i < 8; i++)
947 dbg(" r%d=%08x r%-2d=%08x\n", i, regs[i], i+8, regs[i+8]);
948 signal(num, SIG_DFL);
952 segvlog("segv %d %p @ %08x\n", info->si_code, info->si_addr, regs[15]);
954 // find nearby linkpage
955 for (lp_i = 0; lp_i < ARRAY_SIZE(g_linkpages); lp_i++) {
956 if (g_linkpages[lp_i] == NULL)
958 i = g_linkpages[lp_i]->code_ptr + 2 - pc - 2;
959 if ((int)0xff800000 <= i && i <= 0x007fffff) {
960 lp = g_linkpages[lp_i];
966 err("fatal: no nearby linkpage for %08x\n", regs[15]);
971 ret = mprotect((void *)((long)pc & ~0xfff), 0x1000, PROT_READ|PROT_WRITE|PROT_EXEC);
973 perror("warning: mprotect");
977 op_ctx = (void *)lp->code_ptr;
978 op_ctx->pc = (u32)pc;
980 lp->code_ptr = &op_ctx->code[0];
982 // emit jump to code ptr
983 *pc = make_jmp(pc, lp->code_ptr, 0);
986 emit_op (lp, 0xe50d0000 + 0xf00 - 4 * 0); // str r0, [sp, #(-0xf00 + r0_offs)]
987 emit_op (lp, 0xe50de000 + 0xf00 - 4 * 14); // str lr, [sp, #(-0xf00 + lr_offs)]
988 emit_op (lp, 0xe24f0000 + (lp->code_ptr - (u32 *)op_ctx + 2) * 4); // sub r0, pc, #op_ctx
989 emit_op (lp, 0xe1a0e00f); // mov lr, pc
990 emit_op_io(lp, 0xe51ff000, (u32 *)&lp->handler); // ldr pc, =handle_op
991 emit_op (lp, 0xe51de000 + 0xf00 - 4 * 14); // ldr lr, [sp, #(-0xf00 + lr_offs)]
992 emit_op (lp, make_jmp(lp->code_ptr, pc + 1, 0)); // jmp <back>
995 sys_cacheflush(pc, pc + 1);
996 sys_cacheflush(lp, lp->code_ptr);
998 lp_size = (char *)lp->code_ptr - (char *)lp;
999 segvlog("code #%d %d/%d\n", g_linkpage_count, lp_size, LINKPAGE_SIZE);
1001 if (lp_size + 14*4 > LINKPAGE_SIZE) {
1003 if (g_linkpage_count >= LINKPAGE_COUNT) {
1004 err("too many linkpages needed\n");
1007 g_linkpages[lp_i] = (void *)((char *)g_linkpages[lp_i] + LINKPAGE_SIZE);
1008 init_linkpage(g_linkpages[lp_i]);
1010 //handle_op(regs[15], op, regs, (u32)info->si_addr);
1014 void emu_init(void *map_bottom[2], int is_dl)
1016 sigaction_t segv_action = {
1017 .sa_sigaction = segv_sigaction,
1018 .sa_flags = SA_SIGINFO,
1024 if (geteuid() == 0) {
1025 err("don't try to run as root, device registers or memory "
1026 "might get trashed crashing the OS or even damaging the device.\n");
1033 for (i = 0; i < 2; i++) {
1034 if (map_bottom[i] == NULL)
1036 g_linkpages[i] = (void *)(((u32)map_bottom[i] - LINKPAGE_ALLOC) & ~0xfff);
1037 pret = mmap(g_linkpages[i], LINKPAGE_ALLOC, PROT_READ|PROT_WRITE,
1038 MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED, -1, 0);
1039 if (pret != g_linkpages[i]) {
1040 err("linkpage alloc @ %p: ", g_linkpages[i]);
1044 log("linkpages @ %p\n", g_linkpages[i]);
1045 init_linkpage(g_linkpages[i]);
1051 err("can't init host\n");
1055 ret = host_video_init(NULL, 0);
1057 err("can't init host video\n");
1061 // TODO: check if this really fails on Wiz..
1062 mmsp2.umem = mmap(NULL, 0x2000000, PROT_READ|PROT_WRITE|PROT_EXEC,
1063 MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
1065 if (mmsp2.umem == MAP_FAILED) {
1066 // we are short on memmory on Wiz, need special handling
1067 extern void *host_mmap_upper(void);
1068 mmsp2.umem = host_mmap_upper();
1071 if (mmsp2.umem == MAP_FAILED) {
1072 perror(PFX "mmap upper mem");
1076 pret = mmap(NULL, THREAD_STACK_SIZE, PROT_READ|PROT_WRITE|PROT_EXEC,
1077 MAP_PRIVATE|MAP_ANONYMOUS|MAP_GROWSDOWN, -1, 0);
1078 if (mmsp2.umem == MAP_FAILED) {
1079 perror(PFX "mmap thread stack");
1082 fb_sync_thread_futex = 1;
1083 ret = g_clone(CLONE_VM | CLONE_FS | CLONE_FILES
1084 | CLONE_SIGHAND | CLONE_THREAD,
1085 (char *)pret + THREAD_STACK_SIZE, 0, 0, 0,
1087 if (ret == 0 || ret == -1) {
1088 perror(PFX "start fb thread");
1091 g_futex_raw(&fb_sync_thread_futex, FUTEX_WAIT, 1, NULL);
1094 mmsp2.mlc_stl_adr = 0x03101000; // fb2 is at 0x03381000
1095 mmsp2.mlc_stl_cntl = 0x4ab; // 16bpp, region 1 active
1096 mmsp2.v.width = 320;
1097 mmsp2.v.height = 240;
1098 mmsp2.v.stride = 320*2;
1100 mmsp2.v.dirty_pal = 1;
1102 sigemptyset(&segv_action.sa_mask);
1103 sigaction(SIGSEGV, &segv_action, NULL);
1106 static long emu_mmap_dev(unsigned int length, int prot, int flags, unsigned int offset)
1108 u8 *umem, *umem_end;
1111 if ((offset & ~0x1ffff) == 0xc0000000) {
1112 return g_mmap2_raw((void *)0x7f000000, length, PROT_NONE,
1113 MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED|MAP_NORESERVE, -1, 0);
1116 if ((offset & ~0xffff) == 0xe0020000) {
1117 return g_mmap2_raw((void *)0x7f100000, length, PROT_NONE,
1118 MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED|MAP_NORESERVE, -1, 0);
1121 if ((offset & 0xfe000000) != 0x02000000) {
1122 err("unexpected devmem mmap @ %08x\n", offset);
1126 umem = uppermem_lookup(offset, &umem_end);
1127 if (umem + length > umem_end)
1128 err("warning: uppermem @ %08x overflows by %d bytes\n",
1129 offset, umem + length - umem_end);
1131 dbg("upper mem @ %08x %x = %p\n", offset, length, umem);
1135 long emu_do_mmap(unsigned int length, int prot, int flags, int fd,
1136 unsigned int offset)
1138 if (fd == FAKEDEV_MEM)
1139 return emu_mmap_dev(length, prot, flags, offset);
1141 if (fd == FAKEDEV_FB0)
1142 return emu_mmap_dev(length, prot, flags, offset + 0x03101000);
1144 if (fd == FAKEDEV_FB1)
1145 return emu_mmap_dev(length, prot, flags, offset + 0x03381000);
1147 err("bad/ni mmap(?, %d, %x, %x, %d, %08x)\n", length, prot, flags, fd, offset);
1151 long emu_do_munmap(void *addr, unsigned int length)
1155 // don't allow to unmap upper mem
1156 if ((u8 *)mmsp2.umem <= p && p < (u8 *)mmsp2.umem + 0x2000000) {
1157 dbg("ignoring munmap: %p %x\n", addr, length);
1164 static void emu_sound_open(int fd)
1169 // set default buffer size to 16 * 1K
1170 frag = (16<<16) | 10; // 16K
1171 ret = g_ioctl_raw(fd, SNDCTL_DSP_SETFRAGMENT, &frag);
1173 err("snd ioctl SETFRAGMENT %08x: %d\n", frag, ret);
1177 static long emu_sound_ioctl(int fd, int request, void *argp)
1182 dbg("snd ioctl(%d, %08x, %p)", fd, request, argp);
1184 dbg_c(" [%d]", *arg);
1188 /* People set strange frag settings on GP2X, which even manage
1189 * to break audio on pandora (causes writes to fail).
1190 * Catch this and set to something that works. */
1192 case SNDCTL_DSP_SETFRAGMENT: {
1193 int bsize, frag, frag_cnt;
1199 frag = *arg & 0xffff;
1200 frag_cnt = *arg >> 16;
1201 bsize = frag_cnt << frag;
1202 if (frag < 10 || bsize < 4096*4 || bsize > 4096*4*2) {
1204 * ~4ms. gpSP wants small buffers or else it stutters
1205 * because of it's audio thread sync stuff
1206 * XXX: hardcoding, as low samplerates will result in small fragment size,
1207 * which itself causes ALSA stall and hangs the program.
1208 * Also some apps change samplerate without reopening /dev/dsp,
1209 * which causes ALSA to reject SNDCTL_DSP_SETFRAGMENT.
1211 bsize = 44100 / 250 * 4;
1213 for (frag = 0; bsize; bsize >>= 1, frag++)
1219 frag |= frag_cnt << 16;
1220 ret = g_ioctl_raw(fd, SNDCTL_DSP_SETFRAGMENT, &frag);
1222 err("snd ioctl SETFRAGMENT %08x: %ld\n", frag, ret);
1223 // indicate success even if we fail (because of ALSA mostly),
1224 // things like MikMod will bail out otherwise.
1227 case SNDCTL_DSP_SYNC:
1228 // Franxis tends to use sync/write loops, bad idea under ALSA
1234 return g_ioctl_raw(fd, request, argp);
1237 long emu_do_ioctl(int fd, int request, void *argp)
1239 if (fd == emu_interesting_fds[IFD_SOUND].fd)
1240 return emu_sound_ioctl(fd, request, argp);
1243 /* *********************** */
1250 case FBIOGET_FSCREENINFO: {
1251 struct fb_fix_screeninfo *fix = argp;
1253 memset(fix, 0, sizeof(*fix));
1254 strcpy(fix->id, "mmsp2_RGB0");
1255 fix->type = FB_TYPE_PACKED_PIXELS;
1256 fix->accel = FB_ACCEL_NONE;
1257 fix->visual = FB_VISUAL_TRUECOLOR;
1258 fix->line_length = 320*2;
1259 fix->smem_start = (fd == FAKEDEV_FB0) ? 0x03101000 : 0x03381000;
1260 fix->smem_len = 320*240*2;
1263 case FBIOGET_VSCREENINFO: {
1264 struct fb_var_screeninfo *var = argp;
1265 static const struct fb_bitfield fbb_red = { offset: 11, length: 5, };
1266 static const struct fb_bitfield fbb_green = { offset: 5, length: 6, };
1267 static const struct fb_bitfield fbb_blue = { offset: 0, length: 5, };
1269 memset(var, 0, sizeof(*var));
1270 var->activate = FB_ACTIVATE_NOW;
1272 var->xres_virtual = 320;
1274 var->yres_virtual = 240;
1277 var->vmode = FB_VMODE_NONINTERLACED;
1278 var->bits_per_pixel = 16;
1280 var->green = fbb_green;
1281 var->blue = fbb_blue;
1284 case FBIOPUT_VSCREENINFO: {
1285 struct fb_var_screeninfo *var = argp;
1286 dbg(" put vscreen: %dx%d@%d\n", var->xres, var->yres, var->bits_per_pixel);
1287 if (var->xres != 320 || var->yres != 240 || var->bits_per_pixel != 16)
1293 /* *********************** */
1295 // fake tty0 to make GPH SDL happy
1296 if (request == 0x4b46) // KDGKBENT
1302 err("bad/ni ioctl(%d, %08x, %p)\n", fd, request, argp);
1306 static const char wm97xx_p[] =
1307 "5507 0 -831476 0 -4218 16450692 65536"; // from 4.0 fw
1309 long emu_do_read(int fd, void *buf, int count)
1311 int ret, pressed = 0, x, y;
1317 err("read(%d, %d)\n", fd, count);
1323 mmsp2.btn_state = host_read_btns();
1327 memcpy(buf, &mmsp2.btn_state, count);
1329 case FAKEDEV_WM97XX:
1330 ret = host_read_ts(&pressed, &x, &y);
1331 if (ret == 0 && pressed) {
1332 wm97xx.pressure = 0x8001; // TODO: check the real thing
1333 wm97xx.x = x * 3750 / 1024 + 200;
1334 wm97xx.y = 3750 - y * 3750 / 1024 + 200;
1337 wm97xx.pressure = 0;
1338 wm97xx.x = wm97xx.y = 200;
1341 if (count > sizeof(wm97xx))
1342 count = sizeof(wm97xx);
1343 memcpy(buf, &wm97xx, count);
1345 case FAKEDEV_WM97XX_P:
1346 if (count < sizeof(wm97xx_p))
1347 err("incomplete pointercal read\n");
1348 strncpy(buf, wm97xx_p, count);
1351 dbg("read(%d, %d)\n", fd, count);
1357 struct dev_fd_t emu_interesting_fds[] = {
1358 [IFD_SOUND] = { "/dev/dsp", -1, emu_sound_open },
1362 static const struct {
1366 { "/mnt/tmp", "./tmp" },
1367 { "/mnt/sd", "./mntsd" },
1370 const char *emu_wrap_path(const char *path)
1377 // do only path mapping for now
1378 for (i = 0; i < ARRAY_SIZE(path_map); i++) {
1379 p = strstr(path, path_map[i].from);
1381 size = strlen(path) + strlen(path_map[i].to) + 1;
1382 buff = malloc(size);
1386 strncpy(buff, path, len);
1387 snprintf(buff + len, size - len, "%s%s", path_map[i].to,
1388 path + len + strlen(path_map[i].from));
1389 dbg("mapped path \"%s\" -> \"%s\"\n", path, buff);
1391 ret = g_mkdir_raw(path_map[i].to, 0666);
1392 if (ret != 0 && ret != -EEXIST)
1393 err("mkdir(%s): %ld\n", path_map[i].to, ret);
1402 void emu_wrap_path_free(const char *w_path, const char *old_path)
1404 if (w_path != old_path)
1405 free((void *)w_path);
1408 void *emu_do_fopen(const char *path, const char *mode)
1413 if (strcmp(path, "/etc/pointercal") == 0) {
1414 // use local pontercal, not host's
1415 ret = fopen("pointercal", mode);
1417 ret = fopen("pointercal", "w");
1419 fwrite(wm97xx_p, 1, sizeof(wm97xx_p), ret);
1422 ret = fopen("pointercal", mode);
1426 w_path = emu_wrap_path(path);
1427 ret = fopen(w_path, mode);
1428 emu_wrap_path_free(w_path, path);
1435 int emu_do_system(const char *command)
1437 static char tmp_path[512];
1443 if (command == NULL)
1446 for (p2 = command; *p2 && isspace(*p2); p2++)
1449 if (*p2 == '.') // relative path?
1451 else if (*p2 == '/' && strncmp(p2, "/bin", 4) && strncmp(p2, "/lib", 4)
1452 && strncmp(p2, "/sbin", 4) && strncmp(p2, "/usr", 4))
1453 // absolute path, but not a system command
1456 p2 = emu_wrap_path(command);
1458 make_local_path(tmp_path, sizeof(tmp_path), "ginge_prep");
1459 p = tmp_path + strlen(tmp_path);
1461 snprintf(p, sizeof(tmp_path) - (p - tmp_path), " --nomenu %s", p2);
1464 snprintf(tmp_path, sizeof(tmp_path), "%s", p2);
1465 emu_wrap_path_free(p2, command);
1467 dbg("system: \"%s\"\n", tmp_path);
1469 // the app might want the screen too..
1471 ret = system(tmp_path);
1476 long emu_do_execve(const char *filename, char * const argv[],
1477 char * const envp[])
1479 const char **new_argv;
1484 if (filename == NULL)
1487 if (strstr(filename, "gp2xmenu") != NULL)
1488 host_forced_exit(0);
1490 for (i = 0; argv[i] != NULL; i++)
1494 new_argv = calloc(argc + 2, sizeof(new_argv[0]));
1495 if (new_argv == NULL)
1498 prep_path = malloc(512);
1499 if (prep_path == NULL)
1502 make_local_path(prep_path, 512, "ginge_prep");
1503 new_argv[0] = prep_path;
1504 new_argv[1] = "--nomenu";
1505 new_argv[2] = emu_wrap_path(filename);
1507 if (argv[0] != NULL)
1508 for (i = 1; argv[i] != NULL; i++)
1509 new_argv[i + 2] = argv[i];
1511 dbg("execve \"%s\" %s \"%s\"\n", new_argv[0], new_argv[1], new_argv[2]);
1512 ret = execve(new_argv[0], (char **)new_argv, envp);
1513 err("execve(%s): %ld\n", new_argv[0], ret);
1517 // vim:shiftwidth=2:expandtab