-// vim:shiftwidth=2:expandtab
+/*
+ * GINGE - GINGE Is Not Gp2x Emulator
+ * (C) notaz, 2010-2011
+ *
+ * This work is licensed under the MAME license, see COPYING file for details.
+ */
+// a "gentle" reminder
+#ifdef __ARM_EABI__
+#error loader is meant to be OABI!
+#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+#include <alloca.h>
+#include <ctype.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <signal.h>
#include <asm/ucontext.h>
+#include <pthread.h>
+#include <errno.h>
+#include <time.h>
+#include <sys/resource.h>
+#include <sys/ioctl.h>
+#include <linux/soundcard.h>
+#include <linux/fb.h>
#include "header.h"
+#include "../common/host_fb.h"
+#include "../common/cmn.h"
#include "sys_cacheflush.h"
+#include "realfuncs.h"
+
+#if (DBG & 2) && !(DBG & 4)
+#define LOG_IO_UNK
+#endif
+#if (DBG & 4)
+#define LOG_IO
+#endif
+//#define LOG_SEGV
-//#define iolog printf
+#ifdef LOG_IO
+#define iolog log_io
+#else
#define iolog(...)
-//#define segvlog printf
+#endif
+
+#ifdef LOG_IO_UNK
+#define iolog_unh log_io
+#else
+#define iolog_unh(...)
+#endif
+
+#ifdef LOG_SEGV
+#define segvlog printf
+#else
#define segvlog(...)
+#endif
+
+#if defined(LOG_IO) || defined(LOG_IO_UNK)
+#include "mmsp2-regs.h"
+#endif
+typedef unsigned long long u64;
typedef unsigned int u32;
typedef unsigned short u16;
typedef unsigned char u8;
-struct uppermem_block {
- u32 addr; // physical
- u32 size;
- void *mem;
- struct uppermem_block *next;
-};
-
-static struct uppermem_block *upper_mem;
+static pthread_mutex_t fb_mutex = PTHREAD_MUTEX_INITIALIZER;
+static pthread_cond_t fb_cond = PTHREAD_COND_INITIALIZER;
static struct {
u32 dstctrl;
#define CTRL_TRANSPARENCYENB (1 << 11)
static struct {
+ // mmsp2
+ u16 mlc_stl_cntl;
union {
- u32 mlc_stl_eadr;
+ u32 mlc_stl_adr; // mlcaddress for pollux
struct {
- u16 mlc_stl_eadrl;
- u16 mlc_stl_eadrh;
+ u16 mlc_stl_adrl;
+ u16 mlc_stl_adrh;
};
};
+ u16 mlc_stl_pallt_a;
+ union {
+ u16 mlc_stl_pallt_d[256*2];
+ u32 mlc_stl_pallt_d32[256];
+ };
+
+ // pollux
+ u32 mlccontrol;
+ u16 mlcpalette[256];
+
+ // state
+ void *umem;
+ u32 old_mlc_stl_adr;
+ u32 btn_state; // as seen through /dev/GPIO: 0PVdVu YXBA RLSeSt 0Ri0Dn 0Le0Up
+ struct {
+ u32 width, height;
+ u32 stride;
+ u32 bpp;
+ u32 dirty_pal:2;
+ } v;
} mmsp2;
+#define pollux mmsp2 // so that code doesn't look that weird
+enum {
+ DIRTY_PAL_MMSP2 = 1,
+ DIRTY_PAL_POLLUX = 2,
+};
+
-static u16 *host_screen;
-static int host_stride;
+#if defined(LOG_IO) || defined(LOG_IO_UNK)
+static void log_io(const char *pfx, u32 a, u32 d, int size)
+{
+ const char *fmt, *reg = "";
+ switch (size) {
+ case 8: fmt = "%s %08x %02x %s\n"; d &= 0xff; break;
+ case 32: fmt = "%s %08x %08x %s\n"; break;
+ default: fmt = "%s %08x %04x %s\n"; d &= 0xffff; break;
+ }
+ if ((a & ~0xffff) == 0x7f000000)
+ reg = regnames[a & 0xffff];
+
+ printf(fmt, pfx, a, d, reg);
+}
+#endif
static void memset16(void *dst, u32 pattern, int count)
{
} \
}
-static void *upper_lookup(u32 addr, u8 **mem_end, int *stride_override)
+static void *uppermem_lookup(u32 addr, u8 **mem_end)
{
- struct uppermem_block *ub;
-
- // maybe the screen?
- if (mmsp2.mlc_stl_eadr <= addr && addr < mmsp2.mlc_stl_eadr + 320*240*2) {
- host_screen = host_video_flip(); // HACK
- *mem_end = (u8 *)host_screen + host_stride * 240;
- *stride_override = host_stride;
- return (u8 *)host_screen + addr - mmsp2.mlc_stl_eadr;
- }
+ // XXX: maybe support mirroring?
+ if ((addr & 0xfe000000) != 0x02000000)
+ return NULL;
- for (ub = upper_mem; ub != NULL; ub = ub->next) {
- if (ub->addr <= addr && addr < ub->addr + ub->size) {
- *mem_end = (u8 *)ub->mem + ub->size;
- return (u8 *)ub->mem + addr - ub->addr;
- }
- }
-
- return NULL;
+ *mem_end = (u8 *)mmsp2.umem + 0x02000000;
+ return (u8 *)mmsp2.umem - 0x02000000 + addr;
}
static void blitter_do(void)
{
u8 *dst, *dste, *src = NULL, *srce = NULL;
int w, h, sstrd, dstrd;
- u32 addr;
+ int to_screen = 0;
+ u32 bpp, addr;
w = blitter.size & 0x7ff;
h = (blitter.size >> 16) & 0x7ff;
// XXX: need to confirm this..
addr = (blitter.dstaddr & ~3) | ((blitter.dstctrl & 0x1f) >> 3);
- dst = upper_lookup(addr, &dste, &dstrd);
- if (dst == NULL)
- goto bad_blit;
+
+ // use dst bpp.. How does it do blits with different src bpp?
+ bpp = (blitter.dstctrl & 0x20) ? 16 : 8;
+
+ // maybe the screen?
+ if (((w == 320 && h == 240) || // blit whole screen
+ (w * h >= 320*240/2)) && // ..or at least half of the area
+ mmsp2.mlc_stl_adr <= addr && addr < mmsp2.mlc_stl_adr + 320*240*2)
+ to_screen = 1;
+
+ dst = uppermem_lookup(addr, &dste);
// XXX: assume fill if no SRCENB, but it could be pattern blit..
if (blitter.srcctrl & SRCCTRL_SRCENB) {
goto bad_blit;
addr = (blitter.srcaddr & ~3) | ((blitter.srcctrl & 0x1f) >> 3);
- src = upper_lookup(addr, &srce, &sstrd);
+ src = uppermem_lookup(addr, &srce);
if (src == NULL)
goto bad_blit;
if (src + sstrd * h > srce) {
- printf("blit %08x->%08x %dx%d did not fit src\n",
+ err("blit %08x->%08x %dx%d did not fit src\n",
blitter.srcaddr, blitter.dstaddr, w, h);
h = (srce - src) / sstrd;
}
}
+ if (dst == NULL)
+ goto bad_blit;
+
if (dst + dstrd * h > dste) {
- printf("blit %08x->%08x %dx%d did not fit dst\n",
+ err("blit %08x->%08x %dx%d did not fit dst\n",
blitter.srcaddr, blitter.dstaddr, w, h);
h = (dste - dst) / dstrd;
}
if (src != NULL) {
// copy
- if (blitter.ctrl & CTRL_TRANSPARENCYENB) {
+ if (bpp == 16 && (blitter.ctrl & CTRL_TRANSPARENCYENB)) {
u32 trc = blitter.ctrl >> 16;
for (; h > 0; h--, dst += dstrd, src += sstrd)
blt_tr(dst, src, trc, w);
}
else {
for (; h > 0; h--, dst += dstrd, src += sstrd)
- memcpy(dst, src, w * 2);
+ memcpy(dst, src, w * bpp / 8);
}
}
else {
// fill. Assume the pattern is cleared and bg color is used
u32 bgc = blitter.patbackcolor & 0xffff;
- for (; h > 0; h--, dst += dstrd)
- memset16(dst, bgc, w);
+ if (bpp == 16) {
+ for (; h > 0; h--, dst += dstrd)
+ memset16(dst, bgc, w);
+ }
+ else {
+ for (; h > 0; h--, dst += dstrd)
+ memset(dst, bgc, w); // bgc?
+ }
}
+
+ if (to_screen)
+ pthread_cond_signal(&fb_cond);
return;
bad_blit:
- printf("blit %08x->%08x %dx%d translated to %p->%p\n",
+ err("blit %08x->%08x %dx%d translated to %p->%p\n",
blitter.srcaddr, blitter.dstaddr, w, h, src, dst);
dump_blitter();
}
+// FIXME: pass real dimensions to blitters
+static void mlc_flip(void *src, int bpp, int stride)
+{
+ static int old_bpp;
+
+ // only pass pal to host if it's dirty
+ if (bpp <= 8 && mmsp2.v.dirty_pal) {
+ if (mmsp2.v.dirty_pal == DIRTY_PAL_MMSP2)
+ host_video_update_pal32(mmsp2.mlc_stl_pallt_d32);
+ else
+ host_video_update_pal16(mmsp2.mlcpalette);
+ mmsp2.v.dirty_pal = 0;
+ }
+
+ if (bpp != old_bpp) {
+ host_video_change_bpp(bpp);
+ old_bpp = bpp;
+ }
+
+ switch (bpp) {
+ case 4:
+ host_video_blit4(src, 320, 240, stride);
+ break;
+
+ case 8:
+ host_video_blit8(src, 320, 240, stride);
+ break;
+
+ case 16:
+ host_video_blit16(src, 320, 240, stride);
+ break;
+
+ case 24:
+ // TODO
+ break;
+ }
+}
+
+#define ts_add_nsec(ts, ns) { \
+ ts.tv_nsec += ns; \
+ if (ts.tv_nsec >= 1000000000) { \
+ ts.tv_sec++; \
+ ts.tv_nsec -= 1000000000; \
+ } \
+}
+
+static int fb_sync_thread_paused;
+
+static void *fb_sync_thread(void *arg)
+{
+ int invalid_fb_addr = 1;
+ int manual_refresh = 0;
+ int frame_counter = 0;
+ struct timespec ts;
+ int ret, wait_ret;
+
+ //ret = pthread_setschedprio(pthread_self(), -1);
+ //log("pthread_setschedprio %d\n", ret);
+ //ret = setpriority(PRIO_PROCESS, 0, -1);
+ //log("setpriority %d\n", ret);
+
+ ret = clock_gettime(CLOCK_REALTIME, &ts);
+ if (ret != 0) {
+ perror(PFX "clock_gettime");
+ exit(1);
+ }
+
+ while (1) {
+ u8 *gp2x_fb, *gp2x_fb_end;
+
+ ret = pthread_mutex_lock(&fb_mutex);
+ wait_ret = pthread_cond_timedwait(&fb_cond, &fb_mutex, &ts);
+ ret |= pthread_mutex_unlock(&fb_mutex);
+
+ if (ret != 0) {
+ err("fb_thread: mutex error: %d\n", ret);
+ sleep(1);
+ goto check_keys;
+ }
+ if (wait_ret != 0 && wait_ret != ETIMEDOUT) {
+ err("fb_thread: cond error: %d\n", wait_ret);
+ sleep(1);
+ goto check_keys;
+ }
+ if (fb_sync_thread_paused) {
+ ts_add_nsec(ts, 100000000);
+ goto check_keys;
+ }
+
+ if (wait_ret != ETIMEDOUT) {
+ clock_gettime(CLOCK_REALTIME, &ts);
+ ts_add_nsec(ts, 50000000);
+ manual_refresh++;
+ if (manual_refresh == 2)
+ dbg("fb_thread: switch to manual refresh\n");
+ } else {
+ ts_add_nsec(ts, 16666667);
+ if (manual_refresh > 1)
+ dbg("fb_thread: switch to auto refresh\n");
+ manual_refresh = 0;
+ }
+
+ gp2x_fb = uppermem_lookup(mmsp2.mlc_stl_adr, &gp2x_fb_end);
+ if (gp2x_fb == NULL || gp2x_fb + 320*240 * mmsp2.v.bpp / 8 > gp2x_fb_end) {
+ if (!invalid_fb_addr) {
+ err("fb_thread: %08x is out of range\n", mmsp2.mlc_stl_adr);
+ invalid_fb_addr = 1;
+ }
+ continue;
+ }
+
+ invalid_fb_addr = 0;
+ mlc_flip(gp2x_fb, mmsp2.v.bpp, mmsp2.v.stride);
+
+ frame_counter++;
+ if (frame_counter & 0x0f)
+ continue;
+
+check_keys:
+ // this is to check for kill key, in case main thread hung
+ // or something else went wrong.
+ pollux.btn_state = host_read_btns();
+ }
+}
+
+static void fb_thread_pause(void)
+{
+ fb_sync_thread_paused = 1;
+ // wait until it finishes last refresh
+ // that it might be doing now
+ usleep(10000);
+}
+
+static void fb_thread_resume(void)
+{
+ fb_sync_thread_paused = 0;
+}
+
+static u32 xread32_io_cmn(u32 a, u32 *handled)
+{
+ u32 d = 0;
+
+ *handled = 1;
+ switch (a) {
+ // Wiz stuff
+ case 0x402c: // MLCVSTRIDE0
+ case 0x4060: // MLCVSTRIDE1
+ d = pollux.v.stride;
+ break;
+ case 0x4038: // MLCADDRESS0
+ case 0x406c: // MLCADDRESS1
+ d = pollux.mlc_stl_adr;
+ break;
+ // wiz_lib reads:
+ // ???? ???? YXBA DURiLe ???? VdVuMS LR?? ????
+ // | GPIOC[31:16] | GPIOB[31:16] |
+ case 0xa058: // GPIOBPAD
+ d = (pollux.btn_state >> 1) & 0x0100;
+ d |= (pollux.btn_state << 1) & 0x0200;
+ d |= (pollux.btn_state >> 3) & 0x0080;
+ d |= (pollux.btn_state >> 5) & 0x0040;
+ d |= (pollux.btn_state >> 6) & 0x0c00;
+ d <<= 16;
+ d = ~d;
+ break;
+ case 0xa098: // GPIOCPAD
+ pollux.btn_state = host_read_btns();
+ d = (pollux.btn_state >> 8) & 0x00f0;
+ d |= (pollux.btn_state >> 1) & 0x0008;
+ d |= (pollux.btn_state << 2) & 0x0004;
+ d |= (pollux.btn_state >> 5) & 0x0002;
+ d |= (pollux.btn_state >> 2) & 0x0001;
+ d <<= 16;
+ d = ~d;
+ break;
+ default:
+ *handled = 0;
+ break;
+ }
+
+ return d;
+}
+
static u32 xread8(u32 a)
{
- iolog("r8 %08x\n", a);
+ iolog("r8 ", a, 0, 8);
+ iolog_unh("r8 ", a, 0, 8);
return 0;
}
static u32 xread16(u32 a)
{
-// if ((a & 0xfff00000) == 0x7f100000) { static int a; a ^= ~1; return a & 0xffff; }
- iolog("r16 %08x\n", a);
- return 0;
+ static u32 fudge, old_a;
+ u32 d = 0, t;
+
+ if ((a & 0xffff0000) == 0x7f000000) {
+ u32 a_ = a & 0xffff;
+ switch (a_) {
+ case 0x0910: // FPLL
+ case 0x0912:
+ d = 0x9407;
+ break;
+ // minilib reads as:
+ // 0000 P000 VuVd00 0000 YXBA RLSeSt 0Ri0D 0Le0U
+ // | GPIOD |GPIOC[8:15]|GPIOM[0:7] |
+ // /dev/GPIO:
+ // ... 0PVdVu ...
+ case 0x1184: // GPIOC
+ d = ~mmsp2.btn_state & 0xff00;
+ d |= 0x00ff;
+ break;
+ case 0x1186: // GPIOD
+ t = ~mmsp2.btn_state;
+ d = (t >> 9) & 0x0080;
+ d |= (t >> 11) & 0x0040;
+ d |= (t >> 7) & 0x0800;
+ d |= 0x373b;
+ break;
+ case 0x1198: // GPIOM
+ mmsp2.btn_state = host_read_btns();
+ d = ~mmsp2.btn_state & 0xff;
+ d |= 0x01aa;
+ break;
+ case 0x1836: // reserved
+ d = 0x2330;
+ break;
+ case 0x2816: // DPC_X_MAX
+ d = 319;
+ break;
+ case 0x2818: // DPC_Y_MAX
+ d = 239;
+ break;
+ case 0x28da:
+ d = mmsp2.mlc_stl_cntl;
+ break;
+ case 0x290e:
+ case 0x2912:
+ d = mmsp2.mlc_stl_adrl;
+ break;
+ case 0x2910:
+ case 0x2914:
+ d = mmsp2.mlc_stl_adrh;
+ break;
+ case 0x2958:
+ d = mmsp2.mlc_stl_pallt_a;
+ break;
+
+ default:
+ d = xread32_io_cmn(a_, &t);
+ if (!t)
+ goto unk;
+ if (!(a_ & 2))
+ d >>= 16;
+ break;
+ }
+ goto out;
+ }
+
+unk:
+ if (a == old_a) {
+ d = fudge;
+ fudge = ~fudge;
+ }
+ old_a = a;
+ iolog_unh("r16", a, d & 0xffff, 16);
+
+out:
+ d &= 0xffff;
+ iolog("r16", a, d, 16);
+ return d;
}
static u32 xread32(u32 a)
{
u32 d = 0;
+ if ((a & 0xfff00000) == 0x7f000000) {
+ u32 a_ = a & 0xffff;
+ struct timespec ts;
+ u64 t64;
+ u32 t;
+
+ switch (a_) {
+ case 0x0a00: // TCOUNT, 1/7372800s
+ clock_gettime(CLOCK_REALTIME, &ts);
+ t64 = (u64)ts.tv_sec * 1000000000 + ts.tv_nsec;
+ // t * 7372800.0 / 1000000000 * 0x100000000 ~= t * 31665935
+ t64 *= 31665935;
+ d = t64 >> 32;
+ break;
+
+ default:
+ d = xread32_io_cmn(a_, &t);
+ if (!t)
+ goto unh;
+ break;
+ }
+ goto out;
+ }
if ((a & 0xfff00000) == 0x7f100000) {
u32 *bl = &blitter.dstctrl;
- a &= 0xfff;
- if (a < 0x40)
- d = bl[a / 4];
- if (a == 0x34)
- d = 0; // not busy
+ u32 a_ = a & 0xfff;
+ if (a_ < 0x40) {
+ d = bl[a_ / 4];
+ if (a_ == 0x34)
+ d = 0; // not busy
+ goto out;
+ }
}
- iolog("r32 %08x\n", a);
+
+unh:
+ iolog_unh("r32", a, d, 32);
+
+out:
+ iolog("r32", a, d, 32);
return d;
}
static void xwrite8(u32 a, u32 d)
{
- iolog("w8 %08x %08x\n", a, d);
+ iolog("w8 ", a, d, 8);
+ iolog_unh("w8 ", a, d, 8);
}
static void xwrite16(u32 a, u32 d)
{
- iolog("w16 %08x %08x\n", a, d);
+ iolog("w16", a, d, 16);
if ((a & 0xfff00000) == 0x7f000000) {
- a &= 0xffff;
- switch (a) {
- case 0x2912: mmsp2.mlc_stl_eadrl = d; break;
- case 0x2914: mmsp2.mlc_stl_eadrh = d; break;
+ u32 a_ = a & 0xffff;
+ switch (a_) {
+ case 0x28da: {
+ int mode;
+ mmsp2.mlc_stl_cntl = d | 0xaa;
+ mode = (d >> 9) & 3;
+ mmsp2.v.bpp = mode ? mode * 8 : 4;
+ break;
+ }
+ case 0x290c:
+ mmsp2.v.stride = d;
+ return;
+ case 0x290e:
+ case 0x2910:
+ // odd addresses don't affect LCD. What about TV?
+ return;
+ case 0x2912:
+ mmsp2.mlc_stl_adrl = d;
+ return;
+ case 0x2914:
+ mmsp2.mlc_stl_adrh = d;
+ if (mmsp2.mlc_stl_adr != mmsp2.old_mlc_stl_adr)
+ // ask for refresh
+ pthread_cond_signal(&fb_cond);
+ mmsp2.old_mlc_stl_adr = mmsp2.mlc_stl_adr;
+ return;
+ case 0x2958:
+ mmsp2.mlc_stl_pallt_a = d & 0x1ff;
+ return;
+ case 0x295a:
+ mmsp2.mlc_stl_pallt_d[mmsp2.mlc_stl_pallt_a++] = d;
+ mmsp2.mlc_stl_pallt_a &= 0x1ff;
+ mmsp2.v.dirty_pal = DIRTY_PAL_MMSP2;
+ return;
}
- //printf("w16 %08x %08x\n", a, d);
}
+ iolog_unh("w16", a, d, 16);
}
static void xwrite32(u32 a, u32 d)
{
- iolog("w32 %08x %08x\n", a, d);
+ iolog("w32", a, d, 32);
+
if ((a & 0xfff00000) == 0x7f000000) {
- printf("w32 %08x %08x\n", a, d);
- return;
+ u32 a_ = a & 0xffff;
+ switch (a_) {
+ // Wiz
+ case 0x4024: // MLCCONTROL0
+ case 0x4058: // MLCCONTROL1
+ pollux.mlccontrol = d;
+ if (!(d & 0x20))
+ return; // layer not enabled
+ if ((d >> 16) == 0x443A)
+ pollux.v.bpp = 8;
+ else
+ pollux.v.bpp = 16;
+ return;
+ case 0x402c: // MLCVSTRIDE0
+ case 0x4060: // MLCVSTRIDE1
+ pollux.v.stride = d;
+ return;
+ case 0x4038: // MLCADDRESS0
+ case 0x406c: // MLCADDRESS1
+ pollux.mlc_stl_adr = d;
+ if (d != mmsp2.old_mlc_stl_adr)
+ // ask for refresh
+ pthread_cond_signal(&fb_cond);
+ mmsp2.old_mlc_stl_adr = d;
+ return;
+ case 0x403c: // MLCPALETTE0
+ case 0x4070: // MLCPALETTE1
+ pollux.mlcpalette[d >> 24] = d;
+ pollux.v.dirty_pal = DIRTY_PAL_POLLUX;
+ return;
+ }
}
if ((a & 0xfff00000) == 0x7f100000) {
u32 *bl = &blitter.dstctrl;
- a &= 0xfff;
- if (a < 0x40)
- bl[a / 4] = d;
- if (a == 0x34 && (d & 1))
- blitter_do();
- return;
+ u32 a_ = a & 0xfff;
+ if (a_ < 0x40) {
+ bl[a_ / 4] = d;
+ if (a_ == 0x34 && (d & 1))
+ blitter_do();
+ return;
+ }
}
+ iolog_unh("w32", a, d, 32);
}
+#define LINKPAGE_SIZE 0x1000
+#define LINKPAGE_COUNT 4
+#define LINKPAGE_ALLOC (LINKPAGE_SIZE * LINKPAGE_COUNT)
+
+struct op_context {
+ u32 pc;
+ u32 op;
+ u32 code[0];
+};
+
+struct op_linkpage {
+ void (*handler)(struct op_context *op_ctx);
+ u32 code[0];
+};
+
+struct op_stackframe {
+ u32 saved_regs[15];
+ u32 cpsr;
+};
+
+static struct op_linkpage *g_linkpage;
+static u32 *g_code_ptr;
+static int g_linkpage_count;
+
#define BIT_SET(v, b) (v & (1 << (b)))
-static void handle_op(u32 pc, u32 op, u32 *regs, u32 addr_check)
+void emu_handle_op(struct op_context *op_ctx, struct op_stackframe *sframe)
{
+ u32 *regs = sframe->saved_regs;
+ u32 op = op_ctx->op;
u32 t, shift, ret, addr;
int rn, rd;
return;
unhandled:
- fprintf(stderr, "unhandled IO op %08x @ %08x\n", op, pc);
-}
-
-#define LINKPAGE_SIZE 0x1000
-#define LINKPAGE_COUNT 4
-#define LINKPAGE_ALLOC (LINKPAGE_SIZE * LINKPAGE_COUNT)
-
-struct linkpage {
- u32 saved_regs[15];
- u32 *lp_r1;
- void (*handler)(u32 addr_pc, u32 op, u32 *regs, u32 addr_check);
- u32 code[0];
-};
-
-static struct linkpage *g_linkpage;
-static u32 *g_code_ptr;
-static int g_linkpage_count;
-
-static void init_linkpage(void)
-{
- g_linkpage->lp_r1 = &g_linkpage->saved_regs[1];
- g_linkpage->handler = handle_op;
- g_code_ptr = g_linkpage->code;
+ err("unhandled IO op %08x @ %08x\n", op, op_ctx->pc);
}
static u32 make_offset12(u32 *pc, u32 *target)
u = 0;
}
if (lp_offs >= LINKPAGE_SIZE) {
- fprintf(stderr, "linkpage too far: %d\n", lp_offs);
+ err("linkpage too far: %d\n", lp_offs);
abort();
}
return (u << 23) | lp_offs;
}
-static u32 make_jmp(u32 *pc, u32 *target)
+static u32 make_jmp(u32 *pc, u32 *target, int bl)
{
int jmp_val;
jmp_val = target - pc - 2;
if (jmp_val < (int)0xff000000 || jmp_val > 0x00ffffff) {
- fprintf(stderr, "jump out of range (%p -> %p)\n", pc, target);
+ err("jump out of range (%p -> %p)\n", pc, target);
abort();
}
- return 0xea000000 | (jmp_val & 0x00ffffff);
+ return 0xea000000 | (bl << 24) | (jmp_val & 0x00ffffff);
}
static void emit_op(u32 op)
emit_op(op);
}
+static void init_linkpage(void)
+{
+ g_linkpage->handler = emu_call_handle_op;
+ g_code_ptr = g_linkpage->code;
+}
+
static void segv_sigaction(int num, siginfo_t *info, void *ctx)
{
struct ucontext *context = ctx;
u32 *regs = (u32 *)&context->uc_mcontext.arm_r0;
u32 *pc = (u32 *)regs[15];
- u32 old_op = *pc;
- u32 *pc_ptr, *old_op_ptr;
- int lp_size;
+ struct op_context *op_ctx;
+ int i, lp_size;
- if (((regs[15] ^ (u32)&segv_sigaction) & 0xff000000) == 0 || // PC is in our segment or
- (((regs[15] ^ (u32)g_linkpage) & ~(LINKPAGE_ALLOC - 1)) == 0)) // .. in linkpage
+ if (((regs[15] ^ (u32)&segv_sigaction) & 0xff000000) == 0 || // PC is in our segment or
+ (((regs[15] ^ (u32)g_linkpage) & ~(LINKPAGE_ALLOC - 1)) == 0) || // .. in linkpage
+ ((long)info->si_addr & 0xffe00000) != 0x7f000000) // faulting not where expected
{
// real crash - time to die
- printf("segv %d %p @ %08x\n", info->si_code, info->si_addr, regs[15]);
+ err("segv %d %p @ %08x\n", info->si_code, info->si_addr, regs[15]);
+ for (i = 0; i < 8; i++)
+ dbg(" r%d=%08x r%2d=%08x\n", i, regs[i], i+8, regs[i+8]);
signal(num, SIG_DFL);
raise(num);
+ return;
}
segvlog("segv %d %p @ %08x\n", info->si_code, info->si_addr, regs[15]);
// spit PC and op
- pc_ptr = g_code_ptr++;
- old_op_ptr = g_code_ptr++;
- *pc_ptr = (u32)pc;
- *old_op_ptr = old_op;
+ op_ctx = (void *)g_code_ptr;
+ op_ctx->pc = (u32)pc;
+ op_ctx->op = *pc;
+ g_code_ptr = &op_ctx->code[0];
// emit jump to code ptr
- *pc = make_jmp(pc, g_code_ptr);
+ *pc = make_jmp(pc, g_code_ptr, 0);
// generate code:
- // TODO: our own stack
- emit_op_io(0xe50f0000, &g_linkpage->saved_regs[0]); // str r0, [saved_regs[0]] @ save r0
- emit_op_io(0xe51f0000, (u32 *)&g_linkpage->lp_r1); // ldr r0, =lp_r1
- emit_op (0xe8807ffe); // stmia r0, {r1-r14}
- emit_op (0xe2402004); // sub r2, r0, #4
- emit_op_io(0xe51f0000, pc_ptr); // ldr r0, =pc
- emit_op_io(0xe51f1000, old_op_ptr); // ldr r1, =old_op
- emit_op (0xe1a04002); // mov r4, r2
- emit_op (0xe1a0e00f); // mov lr, pc
- emit_op_io(0xe51ff000, (u32 *)&g_linkpage->handler); // ldr pc, =handle_op
- emit_op (0xe8947fff); // ldmia r4, {r0-r14}
- emit_op (make_jmp(g_code_ptr, pc + 1)); // jmp <back>
+ emit_op (0xe50d0000 + 0xf00 - 4 * 0); // str r0, [sp, #(-0xf00 + r0_offs)]
+ emit_op (0xe50de000 + 0xf00 - 4 * 14); // str lr, [sp, #(-0xf00 + lr_offs)]
+ emit_op (0xe24f0000 + (g_code_ptr - (u32 *)op_ctx + 2) * 4); // sub r0, pc, #op_ctx
+ emit_op (0xe1a0e00f); // mov lr, pc
+ emit_op_io(0xe51ff000, (u32 *)&g_linkpage->handler); // ldr pc, =handle_op
+ emit_op (0xe51de000 + 0xf00 - 4 * 14); // ldr lr, [sp, #(-0xf00 + lr_offs)]
+ emit_op (make_jmp(g_code_ptr, pc + 1, 0)); // jmp <back>
// sync caches
sys_cacheflush(pc, pc + 1);
if (lp_size + 13*4 > LINKPAGE_SIZE) {
g_linkpage_count++;
if (g_linkpage_count >= LINKPAGE_COUNT) {
- fprintf(stderr, "too many linkpages needed\n");
+ err("too many linkpages needed\n");
abort();
}
g_linkpage = (void *)((char *)g_linkpage + LINKPAGE_SIZE);
void emu_init(void *map_bottom)
{
- struct sigaction segv_action = {
+ sigaction_t segv_action = {
.sa_sigaction = segv_sigaction,
.sa_flags = SA_SIGINFO,
};
- void *ret;
-
- sigemptyset(&segv_action.sa_mask);
- sigaction(SIGSEGV, &segv_action, NULL);
+ pthread_t tid;
+ void *pret;
+ int ret;
+
+#ifdef PND
+ if (geteuid() == 0) {
+ fprintf(stderr, "don't try to run as root, device registers or memory "
+ "might get trashed crashing the OS or even damaging the device.\n");
+ exit(1);
+ }
+#endif
g_linkpage = (void *)(((u32)map_bottom - LINKPAGE_ALLOC) & ~0xfff);
- ret = mmap(g_linkpage, LINKPAGE_ALLOC, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
- if (ret != g_linkpage) {
- perror("mmap linkpage");
+ pret = mmap(g_linkpage, LINKPAGE_ALLOC, PROT_READ|PROT_WRITE,
+ MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED, -1, 0);
+ if (pret != g_linkpage) {
+ perror(PFX "mmap linkpage");
exit(1);
}
- printf("linkpages @ %p\n", g_linkpage);
+ log("linkpages @ %p\n", g_linkpage);
init_linkpage();
// host stuff
- host_screen = host_video_init(&host_stride);
- if (host_screen == NULL) {
- printf("can't alloc screen\n");
+ ret = host_init();
+ if (ret != 0) {
+ err("can't init host\n");
+ exit(1);
+ }
+
+ ret = host_video_init(NULL, 0);
+ if (ret != 0) {
+ err("can't init host video\n");
+ exit(1);
+ }
+
+ // TODO: check if this really fails on Wiz..
+ mmsp2.umem = mmap(NULL, 0x2000000, PROT_READ|PROT_WRITE|PROT_EXEC,
+ MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
+#ifdef WIZ
+ if (mmsp2.umem == MAP_FAILED) {
+ // we are short on memmory on Wiz, need special handling
+ extern void *host_mmap_upper(void);
+ mmsp2.umem = host_mmap_upper();
+ }
+#endif
+ if (mmsp2.umem == MAP_FAILED) {
+ perror(PFX "mmap upper mem");
+ exit(1);
+ }
+
+ ret = pthread_create(&tid, NULL, fb_sync_thread, NULL);
+ if (ret != 0) {
+ err("failed to create fb_sync_thread: %d\n", ret);
exit(1);
}
+ pthread_detach(tid);
+
+ // defaults
+ mmsp2.mlc_stl_adr = 0x03101000; // fb2 is at 0x03381000
+ mmsp2.mlc_stl_cntl = 0x4ab; // 16bpp, region 1 active
+ mmsp2.v.width = 320;
+ mmsp2.v.height = 240;
+ mmsp2.v.stride = 320*2;
+ mmsp2.v.bpp = 16;
+ mmsp2.v.dirty_pal = 1;
+
+ sigemptyset(&segv_action.sa_mask);
+ sigaction(SIGSEGV, &segv_action, NULL);
}
int emu_read_gpiodev(void *buf, int count)
{
- unsigned int btns;
-
- if (count < 4) {
- printf("gpiodev read %d?\n", count);
+ if (count <= 0) {
+ err("gpiodev read %d?\n", count);
return -1;
}
+ if (count > 4)
+ count = 4;
- btns = host_read_btns();
- memcpy(buf, &btns, 4);
- return 4;
+ mmsp2.btn_state = host_read_btns();
+ memcpy(buf, &mmsp2.btn_state, count);
+ return count;
}
-void *emu_mmap_dev(unsigned int length, int prot, int flags, unsigned int offset)
+static void *emu_mmap_dev(unsigned int length, int prot, int flags, unsigned int offset)
{
- struct uppermem_block *umem;
- char name[32];
- int fd;
+ u8 *umem, *umem_end;
// SoC regs
- if ((offset & ~0xffff) == 0xc0000000) {
+ if ((offset & ~0x1ffff) == 0xc0000000) {
return mmap((void *)0x7f000000, length, PROT_NONE,
MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED|MAP_NORESERVE, -1, 0);
}
- // blitter
+ // MMSP2 blitter
if ((offset & ~0xffff) == 0xe0020000) {
return mmap((void *)0x7f100000, length, PROT_NONE,
MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED|MAP_NORESERVE, -1, 0);
}
// upper mem
- if ((offset & 0xfe000000) != 0x02000000)
- printf("unexpected devmem mmap @ %08x\n", offset);
+ if ((offset & 0xfe000000) != 0x02000000) {
+ err("unexpected devmem mmap @ %08x\n", offset);
+ errno = EINVAL;
+ return MAP_FAILED;
+ }
- // return mmap(NULL, length, prot, flags, memdev, offset);
+ umem = uppermem_lookup(offset, &umem_end);
+ if (umem + length > umem_end)
+ err("warning: uppermem @ %08x overflows by %d bytes\n",
+ offset, umem + length - umem_end);
- umem = calloc(1, sizeof(*umem));
- if (umem == NULL) {
- printf("OOM\n");
- return MAP_FAILED;
+ dbg("upper mem @ %08x %d\n", offset, length);
+ return umem;
+}
+
+void *emu_do_mmap(unsigned int length, int prot, int flags, int fd, unsigned int offset)
+{
+ if (fd == FAKEDEV_MEM)
+ return emu_mmap_dev(length, prot, flags, offset);
+
+ if (fd == FAKEDEV_FB0)
+ return emu_mmap_dev(length, prot, flags, offset + 0x03101000);
+
+ if (fd == FAKEDEV_FB1)
+ return emu_mmap_dev(length, prot, flags, offset + 0x03381000);
+
+ err("bad/ni mmap(?, %d, %x, %x, %d, %08x)\n", length, prot, flags, fd, offset);
+ errno = EINVAL;
+ return MAP_FAILED;
+}
+
+static void emu_sound_open(int fd)
+{
+#ifdef PND
+ int ret, frag;
+
+ // set default buffer size to 16 * 1K
+ frag = (16<<16) | 10; // 16K
+ ret = ioctl(fd, SNDCTL_DSP_SETFRAGMENT, &frag);
+ if (ret != 0) {
+ err("snd ioctl SETFRAGMENT %08x: ", frag);
+ perror(NULL);
}
+#endif
+}
- umem->addr = offset;
- umem->size = length;
- umem->mem = mmap(NULL, length, prot, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
- if (umem->mem != MAP_FAILED)
- goto done;
-
- printf("upper mem @ %08x %d mmap fail, trying backing file\n", offset, length);
- sprintf(name, "m%08x", offset);
- fd = open(name, O_CREAT|O_RDWR, 0644);
- lseek(fd, length - 1, SEEK_SET);
- name[0] = 0;
- write(fd, name, 1);
-
- umem->mem = mmap(NULL, length, prot, MAP_SHARED, fd, 0);
- if (umem->mem == MAP_FAILED) {
- printf("failed, giving up\n");
- close(fd);
- free(umem);
- return MAP_FAILED;
+static int emu_sound_ioctl(int fd, int request, void *argp)
+{
+ int *arg = argp;
+
+#if 0
+ dbg("snd ioctl(%d, %08x, %p)", fd, request, argp);
+ if (arg != NULL)
+ dbg_c(" [%d]", *arg);
+ dbg_c("\n");
+#endif
+
+ /* People set strange frag settings on GP2X, which even manage
+ * to break audio on pandora (causes writes to fail).
+ * Catch this and set to something that works. */
+ switch(request) {
+ case SNDCTL_DSP_SETFRAGMENT: {
+ int ret, bsize, frag, frag_cnt;
+ if (arg == NULL)
+ break;
+
+ frag = *arg & 0xffff;
+ frag_cnt = *arg >> 16;
+ bsize = frag_cnt << frag;
+ if (frag < 10 || bsize < 4096*4 || bsize > 4096*4*2) {
+ /*
+ * ~4ms. gpSP wants small buffers or else it stutters
+ * because of it's audio thread sync stuff
+ * XXX: hardcoding, as low samplerates will result in small fragment size,
+ * which itself causes ALSA stall and hangs the program.
+ * Also some apps change samplerate without reopening /dev/dsp,
+ * which causes ALSA to reject SNDCTL_DSP_SETFRAGMENT.
+ */
+ bsize = 44100 / 250 * 4;
+
+ for (frag = 0; bsize; bsize >>= 1, frag++)
+ ;
+
+ frag_cnt = 16;
+ }
+
+ frag |= frag_cnt << 16;
+ ret = ioctl(fd, SNDCTL_DSP_SETFRAGMENT, &frag);
+ if (ret != 0) {
+ err("snd ioctl SETFRAGMENT %08x: ", frag);
+ perror(NULL);
+ }
+ // indicate success even if we fail (because of ALSA mostly),
+ // things like MikMod will bail out otherwise.
+ return 0;
+ }
+ case SNDCTL_DSP_SYNC:
+ // Franxis tends to use sync/write loops, bad idea under ALSA
+ return 0;
+ default:
+ break;
+ }
+
+ return ioctl(fd, request, argp);
+}
+
+int emu_do_ioctl(int fd, int request, void *argp)
+{
+ if (fd == emu_interesting_fds[IFD_SOUND].fd)
+ return emu_sound_ioctl(fd, request, argp);
+
+ switch (fd) {
+ /* *********************** */
+ case FAKEDEV_FB0:
+ case FAKEDEV_FB1:
+ if (argp == NULL)
+ goto fail;
+
+ switch (request) {
+ case FBIOGET_FSCREENINFO: {
+ struct fb_fix_screeninfo *fix = argp;
+
+ memset(fix, 0, sizeof(*fix));
+ strcpy(fix->id, "mmsp2_RGB0");
+ fix->type = FB_TYPE_PACKED_PIXELS;
+ fix->accel = FB_ACCEL_NONE;
+ fix->visual = FB_VISUAL_TRUECOLOR;
+ fix->line_length = 320*2;
+ fix->smem_start = (fd == FAKEDEV_FB0) ? 0x03101000 : 0x03381000;
+ fix->smem_len = 320*240*2;
+ return 0;
+ }
+ case FBIOGET_VSCREENINFO: {
+ struct fb_var_screeninfo *var = argp;
+ static const struct fb_bitfield fbb_red = { offset: 11, length: 5, };
+ static const struct fb_bitfield fbb_green = { offset: 5, length: 6, };
+ static const struct fb_bitfield fbb_blue = { offset: 0, length: 5, };
+
+ memset(var, 0, sizeof(*var));
+ var->activate = FB_ACTIVATE_NOW;
+ var->xres =
+ var->xres_virtual = 320;
+ var->yres =
+ var->yres_virtual = 240;
+ var->width =
+ var->height = -1;
+ var->vmode = FB_VMODE_NONINTERLACED;
+ var->bits_per_pixel = 16;
+ var->red = fbb_red;
+ var->green = fbb_green;
+ var->blue = fbb_blue;
+ return 0;
+ }
+ case FBIOPUT_VSCREENINFO: {
+ struct fb_var_screeninfo *var = argp;
+ dbg(" put vscreen: %dx%d@%d\n", var->xres, var->yres, var->bits_per_pixel);
+ if (var->xres != 320 || var->yres != 240 || var->bits_per_pixel != 16)
+ return -1;
+ return 0;
+ }
+ }
+
+ /* *********************** */
+ case FAKEDEV_TTY0:
+ // fake tty0 to make GPH SDL happy
+ if (request == 0x4b46) // KDGKBENT
+ return -1;
+ return 0;
+ }
+
+fail:
+ err("bad/ni ioctl(%d, %08x, %p)\n", fd, request, argp);
+ errno = EINVAL;
+ return -1;
+}
+
+struct dev_fd_t emu_interesting_fds[] = {
+ [IFD_SOUND] = { "/dev/dsp", -1, emu_sound_open },
+ { NULL, 0, NULL },
+};
+
+static const struct {
+ const char *from;
+ const char *to;
+} path_map[] = {
+ { "/mnt/tmp", "./tmp" },
+};
+
+static const char *wrap_path(const char *path)
+{
+ char *buff, *p;
+ size_t size;
+ int i, len;
+
+ // do only path mapping for now
+ for (i = 0; i < ARRAY_SIZE(path_map); i++) {
+ p = strstr(path, path_map[i].from);
+ if (p != NULL) {
+ size = strlen(path) + strlen(path_map[i].to) + 1;
+ buff = malloc(size);
+ if (buff == NULL)
+ break;
+ len = p - path;
+ strncpy(buff, path, len);
+ snprintf(buff + len, size - len, "%s%s", path_map[i].to,
+ path + len + strlen(path_map[i].from));
+ dbg("mapped path \"%s\" -> \"%s\"\n", path, buff);
+ return buff;
+ }
}
-done:
- printf("upper mem @ %08x %d\n", offset, length);
- umem->next = upper_mem;
- upper_mem = umem;
- return umem->mem;
+ return path;
+}
+
+static void wrap_path_free(const char *w_path, const char *old_path)
+{
+ if (w_path != old_path)
+ free((void *)w_path);
}
+void *emu_do_fopen(const char *path, const char *mode)
+{
+ const char *w_path;
+ FILE *ret;
+
+ w_path = wrap_path(path);
+ ret = fopen(w_path, mode);
+ wrap_path_free(w_path, path);
+
+ return ret;
+}
+
+// FIXME: threads..
+int emu_do_system(const char *command)
+{
+ static char tmp_path[512];
+ int need_ginge = 0;
+ const char *p2;
+ char *p;
+ int ret;
+
+ if (command == NULL)
+ return -1;
+
+ for (p2 = command; *p2 && isspace(*p2); p2++)
+ ;
+
+ if (*p2 == '.') // relative path?
+ need_ginge = 1;
+ else if (*p2 == '/' && strncmp(p2, "/bin", 4) && strncmp(p2, "/lib", 4)
+ && strncmp(p2, "/sbin", 4) && strncmp(p2, "/usr", 4))
+ // absolute path, but not a system command
+ need_ginge = 1;
+
+ p2 = wrap_path(command);
+ if (need_ginge) {
+ make_local_path(tmp_path, sizeof(tmp_path), "ginge_prep");
+ p = tmp_path + strlen(tmp_path);
+
+ snprintf(p, sizeof(tmp_path) - (p - tmp_path), " --nomenu %s", p2);
+ }
+ else
+ snprintf(tmp_path, sizeof(tmp_path), "%s", p2);
+ wrap_path_free(p2, command);
+
+ dbg("system: \"%s\"\n", tmp_path);
+
+ // the app might want the screen too..
+ fb_thread_pause();
+ ret = system(tmp_path);
+ fb_thread_resume();
+ return ret;
+}
+
+int emu_do_execve(const char *filename, char *const argv[], char *const envp[])
+{
+ const char **new_argv;
+ char *prep_path;
+ int i, ret, argc;
+
+ if (filename == NULL)
+ return -1;
+
+ if (strstr(filename, "/gp2xmenu") != NULL)
+ exit(0);
+
+ for (i = 0; argv[i] != NULL; i++)
+ ;
+ argc = i + 1;
+
+ new_argv = calloc(argc + 2, sizeof(new_argv[0]));
+ if (new_argv == NULL)
+ return -1;
+
+ prep_path = malloc(512);
+ if (prep_path == NULL)
+ return -1;
+
+ make_local_path(prep_path, 512, "ginge_prep");
+ new_argv[0] = prep_path;
+ new_argv[1] = "--nomenu";
+ new_argv[2] = wrap_path(filename);
+
+ if (argv[0] != NULL)
+ for (i = 1; argv[i] != NULL; i++)
+ new_argv[i + 2] = argv[i];
+
+ dbg("execve \"%s\" %s \"%s\"\n", new_argv[0], new_argv[1], new_argv[2]);
+ ret = execve(new_argv[0], (char **)new_argv, envp);
+ perror("execve");
+ return ret;
+}
+
+// vim:shiftwidth=2:expandtab
notaz.gp2x.de / ginge.git / blobdiff