#include "header.h"
#include "sys_cacheflush.h"
-//#define iolog printf
+//#define LOG_IO
+//#define LOG_IO_UNH
+//#define LOG_SEGV
+
+#ifdef LOG_IO
+#define iolog log_io
+#else
#define iolog(...)
-//#define segvlog printf
+#endif
+
+#ifdef LOG_IO_UNH
+#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_UNH)
+#include "mmsp2-regs.h"
+#endif
typedef unsigned int u32;
typedef unsigned short u16;
#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
+ u16 dirty_pal:1;
} mmsp2;
static u16 *host_screen;
static int host_stride;
+#if defined(LOG_IO) || defined(LOG_IO_UNH)
+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"; break;
+ case 32: fmt = "%s %08x %08x %s\n"; break;
+ default: fmt = "%s %08x %04x %s\n"; 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)
{
u32 *dl;
} \
}
-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;
- }
-
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 NULL;
}
+static void *blitter_mem_lookup(u32 addr, u8 **mem_end, int *stride_override, int *to_screen)
+{
+ // maybe the screen?
+ if (mmsp2.mlc_stl_adr <= addr && addr < mmsp2.mlc_stl_adr + 320*240*2) {
+ *mem_end = (u8 *)host_screen + host_stride * 240;
+ *stride_override = host_stride;
+ *to_screen = 1;
+ return (u8 *)host_screen + addr - mmsp2.mlc_stl_adr;
+ }
+
+ return uppermem_lookup(addr, mem_end);
+}
+
static void blitter_do(void)
{
u8 *dst, *dste, *src = NULL, *srce = NULL;
int w, h, sstrd, dstrd;
+ int to_screen = 0;
u32 addr;
w = blitter.size & 0x7ff;
// XXX: need to confirm this..
addr = (blitter.dstaddr & ~3) | ((blitter.dstctrl & 0x1f) >> 3);
- dst = upper_lookup(addr, &dste, &dstrd);
+ dst = blitter_mem_lookup(addr, &dste, &dstrd, &to_screen);
if (dst == NULL)
goto bad_blit;
goto bad_blit;
addr = (blitter.srcaddr & ~3) | ((blitter.srcctrl & 0x1f) >> 3);
- src = upper_lookup(addr, &srce, &sstrd);
+ src = blitter_mem_lookup(addr, &srce, &sstrd, &to_screen);
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 + 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;
}
for (; h > 0; h--, dst += dstrd)
memset16(dst, bgc, w);
}
+
+ if (to_screen)
+ host_screen = host_video_flip();
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();
}
+// TODO: hw scaler stuff
+static void mlc_flip(u32 addr)
+{
+ int mode = (mmsp2.mlc_stl_cntl >> 9) & 3;
+ int bpp = mode ? mode * 8 : 4;
+ u16 *dst = host_screen;
+ u16 *hpal = mmsp2.host_pal;
+ u8 *src, *src_end;
+ int i, u;
+
+ src = uppermem_lookup(addr, &src_end);
+ if (src == NULL || src + 320*240 * bpp / 8 > src_end) {
+ err("mlc_flip: %08x is out of range\n", addr);
+ return;
+ }
+
+ 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();
+}
+
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 0x28da:
+ d = mmsp2.mlc_stl_cntl;
+ 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) == 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)
+ mlc_flip(mmsp2.mlc_stl_adr);
+ 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;
+
+#define HANDLER_STACK_SIZE 4096
+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);
}
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);
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;
+ void *pret;
+ int ret;
sigemptyset(&segv_action.sa_mask);
sigaction(SIGSEGV, &segv_action, NULL);
+ pret = mmap(NULL, HANDLER_STACK_SIZE + 4096, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_NORESERVE, -1, 0);
+ if (pret == MAP_FAILED) {
+ perror(PFX "mmap handler_stack");
+ exit(1);
+ }
+ ret = mprotect((char *)pret + 4096, HANDLER_STACK_SIZE, PROT_READ | PROT_WRITE);
+ if (ret != 0) {
+ perror(PFX "mprotect handler_stack");
+ exit(1);
+ }
+ g_handler_stack_end = (char *)pret + HANDLER_STACK_SIZE + 4096;
+
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);
// host stuff
ret = host_video_init(&host_stride, 0);
if (ret != 0) {
- printf("can't alloc screen\n");
+ err("can't alloc screen\n");
exit(1);
}
host_screen = host_video_flip();
unsigned int btns;
if (count < 4) {
- printf("gpiodev read %d?\n", count);
+ err("gpiodev read %d?\n", count);
return -1;
}
}
// upper mem
if ((offset & 0xfe000000) != 0x02000000)
- printf("unexpected devmem mmap @ %08x\n", offset);
+ err("unexpected devmem mmap @ %08x\n", offset);
// return mmap(NULL, length, prot, flags, memdev, offset);
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);
return MAP_FAILED;
notaz.gp2x.de / ginge.git / blobdiff