#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+#include <alloca.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 "header.h"
#include "sys_cacheflush.h"
-//#define iolog printf
+//#define LOG_IO
+//#define LOG_IO_UNK
+//#define LOG_SEGV
+
+#ifdef LOG_IO
+#define iolog log_io
+#else
#define iolog(...)
+#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 int u32;
typedef unsigned short u16;
typedef unsigned char u8;
+static pthread_mutex_t fb_mutex = PTHREAD_MUTEX_INITIALIZER;
+static pthread_cond_t fb_cond = PTHREAD_COND_INITIALIZER;
+
struct uppermem_block {
u32 addr; // physical
u32 size;
u32 srcfifo;
} blitter;
+#define SRCCTRL_INVIDEO (1 << 8)
+#define SRCCTRL_SRCENB (1 << 7)
+#define CTRL_TRANSPARENCYENB (1 << 11)
+
static struct {
+ u16 mlc_stl_cntl;
union {
- u32 mlc_stl_eadr;
+ u32 mlc_stl_adr;
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];
+ };
+
+ // state
+ u16 host_pal[256];
+ u32 old_mlc_stl_adr;
+ u32 btn_state; // as seen through /dev/GPIO
+ u32 dirty_pal:1;
} mmsp2;
static u16 *host_screen;
static int host_stride;
-static void *upper_lookup(u32 addr, u8 **mem_end, int *stride_override)
+#if defined(LOG_IO) || defined(LOG_IO_UNK)
+static void log_io(const char *pfx, u32 a, u32 d, int size)
{
- struct uppermem_block *ub;
+ 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;
+ }
- // 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;
+ if ((a & ~0xffff) == 0x7f000000)
+ reg = regnames[a & 0xffff];
+
+ printf(fmt, pfx, a, d, reg);
+}
+#endif
+
+static void memset16(void *dst, u32 pattern, int count)
+{
+ u32 *dl;
+ u16 *d;
+
+ d = (u16 *)((long)dst & ~1);
+ if ((long)d & 2) {
+ *d++ = pattern;
+ count--;
}
+ dl = (void *)d;
+ pattern |= pattern << 16;
+
+ while (count >= 2) {
+ *dl++ = pattern;
+ count -= 2;
+ }
+ if (count)
+ *(u16 *)dl = pattern;
+}
+
+static void blt_tr(void *dst, void *src, u32 trc, int w)
+{
+ u16 *d = (u16 *)((long)dst & ~1);
+ u16 *s = (u16 *)((long)src & ~1);
+
+ // XXX: optimize
+ for (; w > 0; d++, s++, w--)
+ if (*s != trc)
+ *d = *s;
+}
+
+#define dump_blitter() \
+{ \
+ u32 *r = &blitter.dstctrl; \
+ int i; \
+ for (i = 0; i < 4*4; i++, r++) { \
+ printf("%08x ", *r); \
+ if ((i & 3) == 3) \
+ printf("\n"); \
+ } \
+}
+
+static void *uppermem_lookup(u32 addr, u8 **mem_end)
+{
+ struct uppermem_block *ub;
for (ub = upper_mem; ub != NULL; ub = ub->next) {
if (ub->addr <= addr && addr < ub->addr + ub->size) {
static void blitter_do(void)
{
- u8 *dst, *dste, *src, *srce;
+ u8 *dst, *dste, *src = NULL, *srce = NULL;
int w, h, sstrd, dstrd;
-
- if (blitter.srcaddr == blitter.dstaddr)
- return; // dummy blit?
+ int to_screen = 0;
+ u32 bpp, addr;
w = blitter.size & 0x7ff;
h = (blitter.size >> 16) & 0x7ff;
sstrd = blitter.srcstride;
dstrd = blitter.dststride;
- dst = upper_lookup(blitter.dstaddr, &dste, &dstrd);
- src = upper_lookup(blitter.srcaddr, &srce, &sstrd);
+ // XXX: need to confirm this..
+ addr = (blitter.dstaddr & ~3) | ((blitter.dstctrl & 0x1f) >> 3);
- if (dst == NULL || src == NULL) {
- printf("blit %08x->%08x %dx%d translated to %p->%p\n",
- blitter.srcaddr, blitter.dstaddr, w, h, src, dst);
- return;
+ // 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) {
+ if (!(blitter.srcctrl & SRCCTRL_INVIDEO))
+ goto bad_blit;
+
+ addr = (blitter.srcaddr & ~3) | ((blitter.srcctrl & 0x1f) >> 3);
+ src = uppermem_lookup(addr, &srce);
+ if (src == NULL)
+ goto bad_blit;
+
+ if (src + sstrd * h > srce) {
+ 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 + sstrd * h > srce) {
- printf("blit %08x->%08x %dx%d did not fit src\n",
- blitter.srcaddr, blitter.dstaddr, w, h);
- h = (srce - src) / sstrd;
+ if (src != NULL) {
+ // copy
+ 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 * bpp / 8);
+ }
+ }
+ else {
+ // fill. Assume the pattern is cleared and bg color is used
+ u32 bgc = blitter.patbackcolor & 0xffff;
+ 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?
+ }
}
- for (; h > 0; h--, dst += dstrd, src += sstrd)
- memcpy(dst, src, w * 2);
+ if (to_screen)
+ pthread_cond_signal(&fb_cond);
+ return;
+
+bad_blit:
+ err("blit %08x->%08x %dx%d translated to %p->%p\n",
+ blitter.srcaddr, blitter.dstaddr, w, h, src, dst);
+ dump_blitter();
+}
+
+// TODO: hw scaler stuff
+static void mlc_flip(u8 *src, int bpp)
+{
+ u16 *dst = host_screen;
+ u16 *hpal = mmsp2.host_pal;
+ int i, u;
+
+ if (bpp <= 8 && mmsp2.dirty_pal) {
+ u32 *srcp = mmsp2.mlc_stl_pallt_d32;
+ u16 *dstp = hpal;
+
+ for (i = 0; i < 256; i++, srcp++, dstp++) {
+ u32 t = *srcp;
+ *dstp = ((t >> 8) & 0xf800) | ((t >> 5) & 0x07e0) | ((t >> 3) & 0x001f);
+ }
+ mmsp2.dirty_pal = 0;
+ }
+
+ switch (bpp) {
+ case 4:
+ for (i = 0; i < 240; i++, dst += host_stride / 2 - 320) {
+ for (u = 320 / 2; u > 0; u--, src++) {
+ *dst++ = hpal[*src >> 4];
+ *dst++ = hpal[*src & 0x0f];
+ }
+ }
+ break;
+
+ case 8:
+ for (i = 0; i < 240; i++, dst += host_stride / 2 - 320) {
+ for (u = 320 / 4; u > 0; u--) {
+ *dst++ = hpal[*src++];
+ *dst++ = hpal[*src++];
+ *dst++ = hpal[*src++];
+ *dst++ = hpal[*src++];
+ }
+ }
+ break;
+
+ case 16:
+ for (i = 0; i < 240; i++, dst += host_stride / 2, src += 320*2)
+ memcpy(dst, src, 320*2);
+ break;
+
+ case 24:
+ // TODO
+ break;
+ }
+
+ host_screen = host_video_flip();
+}
+
+#define ts_add_nsec(ts, ns) { \
+ ts.tv_nsec += ns; \
+ if (ts.tv_nsec >= 1000000000) { \
+ ts.tv_sec++; \
+ ts.tv_nsec -= 1000000000; \
+ } \
+}
+
+static void *fb_sync_thread(void *arg)
+{
+ int invalid_fb_addr = 1;
+ int manual_refresh = 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;
+ int mode, bpp;
+
+ 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);
+ continue;
+ }
+ if (wait_ret != 0 && wait_ret != ETIMEDOUT) {
+ err("fb_thread: cond error: %d\n", wait_ret);
+ sleep(1);
+ continue;
+ }
+
+ if (wait_ret != ETIMEDOUT) {
+ clock_gettime(CLOCK_REALTIME, &ts);
+ ts_add_nsec(ts, 50000000);
+ manual_refresh++;
+ if (manual_refresh == 2)
+ log("fb_thread: switch to manual refresh\n");
+ } else {
+ ts_add_nsec(ts, 16666667);
+ if (manual_refresh > 1)
+ log("fb_thread: switch to auto refresh\n");
+ manual_refresh = 0;
+ }
+
+ mode = (mmsp2.mlc_stl_cntl >> 9) & 3;
+ bpp = mode ? mode * 8 : 4;
+
+ gp2x_fb = uppermem_lookup(mmsp2.mlc_stl_adr, &gp2x_fb_end);
+ if (gp2x_fb == NULL || gp2x_fb + 320*240 * 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;
+ }
+
+ mlc_flip(gp2x_fb, bpp);
+ }
}
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 0R0D 0L0U
+ // | 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:
+ goto unh;
+ }
+ goto out;
+ }
+
+unh:
+ 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;
+ switch (a_) {
+ case 0x0a00: // TCOUNT, 1/7372800s
+ // TODO
+ break;
+ }
+ }
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);
+ 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:
+ mmsp2.mlc_stl_cntl = d | 0xaa;
+ break;
+ 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.dirty_pal = 1;
+ 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);
- if ((a & 0xfff00000) == 0x7f000000) {
- printf("w32 %08x %08x\n", a, d);
- return;
- }
+ iolog("w32", a, d, 32);
+
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 linkpage {
+ u32 saved_regs[15];
+ u32 cpsr;
+ u32 *handler_stack;
+ void (*handler)(struct op_context *op_ctx);
+ u32 code[0];
+};
+
+static struct linkpage *g_linkpage;
+static u32 *g_code_ptr;
+static int g_linkpage_count;
+
+static void *g_handler_stack_end;
+
#define BIT_SET(v, b) (v & (1 << (b)))
-static void handle_op(u32 pc, u32 op, u32 *regs, u32 addr_check)
+static void handle_op(struct op_context *op_ctx)
{
+ u32 *regs = g_linkpage->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 = handle_op;
+ g_linkpage->handler_stack = g_handler_stack_end;
+ g_code_ptr = g_linkpage->code;
+
+ // common_code.
+ // r0 and r14 must be saved by caller, r0 is arg for handle_op
+ // on return everything is restored except lr, which is used to return
+ emit_op_io(0xe50f1000, &g_linkpage->saved_regs[1]); // str r1, [->saved_regs[1]] @ save r1
+ emit_op (0xe24f1000 + // sub r1, pc, =offs(saved_regs[2])
+ (g_code_ptr - &g_linkpage->saved_regs[2] + 2) * 4);
+ emit_op (0xe8813ffc); // stmia r1, {r2-r13}
+ emit_op_io(0xe51fd000, // ldr sp, [->handler_stack]
+ (u32 *)&g_linkpage->handler_stack);
+ emit_op (0xe2414008); // sub r4, r1, #4*2
+ emit_op (0xe10f1000); // mrs r1, cpsr
+ emit_op_io(0xe50f1000, &g_linkpage->cpsr); // str r1, [->cpsr]
+ emit_op (0xe1a0500e); // mov r5, lr
+ emit_op (0xe1a0e00f); // mov lr, pc
+ emit_op_io(0xe51ff000, (u32 *)&g_linkpage->handler); // ldr pc, =handle_op
+ emit_op_io(0xe51f1000, &g_linkpage->cpsr); // ldr r1, [->cpsr]
+ emit_op (0xe128f001); // msr cpsr_f, r1
+ emit_op (0xe1a0e005); // mov lr, r5
+ emit_op (0xe8943fff); // ldmia r4, {r0-r13}
+ emit_op (0xe12fff1e); // bx lr @ return
+}
+
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;
+ struct op_context *op_ctx;
int 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]);
signal(num, SIG_DFL);
raise(num);
+ return;
}
- printf("segv %d %p @ %08x\n", info->si_code, info->si_addr, regs[15]);
+ 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>
+ // TODO: multithreading
+ emit_op_io(0xe50f0000, &g_linkpage->saved_regs[0]); // str r0, [->saved_regs[0]] @ save r0
+ emit_op_io(0xe50fe000, &g_linkpage->saved_regs[14]); // str r14, [->saved_regs[14]]
+ emit_op (0xe24f0000 + (g_code_ptr - (u32 *)op_ctx + 2) * 4); // sub r0, pc, #op_ctx
+ emit_op (make_jmp(g_code_ptr, &g_linkpage->code[0], 1)); // bl common_code
+ emit_op_io(0xe51fe000, &g_linkpage->saved_regs[14]); // ldr r14, [->saved_regs[14]]
+ emit_op (make_jmp(g_code_ptr, pc + 1, 0)); // jmp <back>
// sync caches
sys_cacheflush(pc, pc + 1);
sys_cacheflush(g_linkpage, g_code_ptr);
lp_size = (char *)g_code_ptr - (char *)g_linkpage;
- printf("code #%d %d/%d\n", g_linkpage_count, lp_size, LINKPAGE_SIZE);
+ segvlog("code #%d %d/%d\n", g_linkpage_count, lp_size, LINKPAGE_SIZE);
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);
.sa_sigaction = segv_sigaction,
.sa_flags = SA_SIGINFO,
};
- void *ret;
+ pthread_t tid;
+ void *pret;
+ int ret;
- sigemptyset(&segv_action.sa_mask);
- sigaction(SIGSEGV, &segv_action, NULL);
+ g_handler_stack_end = (void *)((long)alloca(1536 * 1024) & ~0xffff);
+ log("handler stack @ %p (current %p)\n", g_handler_stack_end, &ret);
+ // touch it now. If we crash now we'll know why
+ *((char *)g_handler_stack_end - 4096) = 1;
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, -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_video_init(&host_stride, 0);
+ if (ret != 0) {
+ err("can't alloc screen\n");
+ exit(1);
+ }
+ host_screen = host_video_flip();
+
+ 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);
+
+ // mmsp2 defaults
+ mmsp2.mlc_stl_adr = 0x03101000; // fb2 is at 0x03381000
+
+ 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);
+ err("gpiodev read %d?\n", count);
return -1;
}
return 4;
}
-void *emu_mmap_dev(unsigned int length, int prot, int flags, unsigned int offset)
+struct dev_fd_t emu_interesting_fds[] = {
+ [IFD_SOUND] = { "/dev/dsp", -1 },
+ { NULL, 0 },
+};
+
+static void *emu_mmap_dev(unsigned int length, int prot, int flags, unsigned int offset)
{
struct uppermem_block *umem;
char name[32];
}
// upper mem
if ((offset & 0xfe000000) != 0x02000000)
- printf("unexpected devmem mmap @ %08x\n", offset);
-
- // return mmap(NULL, length, prot, flags, memdev, offset);
+ err("unexpected devmem mmap @ %08x\n", offset);
umem = calloc(1, sizeof(*umem));
if (umem == NULL) {
- printf("OOM\n");
+ err("OOM\n");
return MAP_FAILED;
}
if (umem->mem != MAP_FAILED)
goto done;
- printf("upper mem @ %08x %d mmap fail, trying backing file\n", offset, length);
+ log("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);
umem->mem = mmap(NULL, length, prot, MAP_SHARED, fd, 0);
if (umem->mem == MAP_FAILED) {
- printf("failed, giving up\n");
+ err("failed, giving up\n");
close(fd);
free(umem);
+ errno = EINVAL;
return MAP_FAILED;
}
done:
- printf("upper mem @ %08x %d\n", offset, length);
+ log("upper mem @ %08x %d\n", offset, length);
umem->next = upper_mem;
upper_mem = umem;
return umem->mem;
}
+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)", length, prot, flags, fd, offset);
+ errno = EINVAL;
+ return MAP_FAILED;
+}
+
+#include <sys/ioctl.h>
+#include <linux/soundcard.h>
+
+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. */
+ if (request == SNDCTL_DSP_SPEED) {
+ int ret, bsize, frag;
+
+ // ~4ms. gpSP wants small buffers or else it stutters
+ // because of it's audio thread sync stuff
+ bsize = *arg / 250 * 4;
+ for (frag = 0; bsize; bsize >>= 1, frag++)
+ ;
+
+ frag |= 16 << 16; // fragment count
+ ret = ioctl(fd, SNDCTL_DSP_SETFRAGMENT, &frag);
+ if (ret != 0) {
+ err("snd ioctl SETFRAGMENT %08x: ", frag);
+ perror(NULL);
+ }
+ }
+ else if (request == SNDCTL_DSP_SETFRAGMENT)
+ return 0;
+
+ return ioctl(fd, request, argp);
+}
+
+#include <linux/fb.h>
+
+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);
+
+ if (argp == NULL)
+ goto fail;
+
+ if (fd == FAKEDEV_FB0 || fd == FAKEDEV_FB1) {
+ 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->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: 0, length: 4, };
+ static const struct fb_bitfield fbb_green = { offset: 0, length: 4, };
+ static const struct fb_bitfield fbb_blue = { offset: 0, length: 4, };
+
+ 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;
+ }
+ }
+ }
+
+fail:
+ err("bad/ni ioctl(%d, %08x, %p)", fd, request, argp);
+ errno = EINVAL;
+ return -1;
+}
+