// vim:shiftwidth=2:expandtab
#include <stdio.h>
#include <stdlib.h>
+#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <asm/ucontext.h>
#include "header.h"
-
-#define iolog printf
-//#define iolog(...)
+#include "sys_cacheflush.h"
+
+//#define LOG_IO
+//#define LOG_IO_UNH
+//#define LOG_SEGV
+
+#ifdef LOG_IO
+#define iolog log_io
+#else
+#define iolog(...)
+#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;
typedef unsigned char u8;
-static int memdev;
-static volatile u16 *memregs, *blitter;
+struct uppermem_block {
+ u32 addr; // physical
+ u32 size;
+ void *mem;
+ struct uppermem_block *next;
+};
+
+static struct uppermem_block *upper_mem;
+
+static struct {
+ u32 dstctrl;
+ u32 dstaddr;
+ u32 dststride;
+ u32 srcctrl;
+ u32 srcaddr; //
+ u32 srcstride;
+ u32 srcforcolor;
+ u32 srcbackcolor;
+ u32 patctrl; //
+ u32 patforcolor;
+ u32 patbackcolor;
+ u32 size;
+ u32 ctrl; //
+ u32 run;
+ u32 intc;
+ 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_adr;
+ struct {
+ 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;
-static volatile void *translate_addr(u32 a, u32 *mask)
+#if defined(LOG_IO) || defined(LOG_IO_UNH)
+static void log_io(const char *pfx, u32 a, u32 d, int size)
{
- if ((a & 0xfff00000) == 0x7f000000) {
- *mask = 0xffff;
- return memregs;
+ 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 & 0xfff00000) == 0x7f100000) {
- *mask = 0xff;
- return blitter;
+
+ 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;
}
- fprintf(stderr, "bad IO @ %08x\n", a);
- abort();
+ if (count)
+ *(u16 *)dl = pattern;
}
-static u32 xread8(u32 a)
+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) {
+ *mem_end = (u8 *)ub->mem + ub->size;
+ return (u8 *)ub->mem + addr - ub->addr;
+ }
+ }
+
+ return NULL;
+}
+
+static void *blitter_mem_lookup(u32 addr, u8 **mem_end, int *stride_override, int *to_screen)
{
- volatile u8 *mem;
- u32 mask;
+ // 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;
+ }
- iolog("r8 %08x\n", a);
- mem = translate_addr(a, &mask);
- return mem[a & mask];
+ 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;
+ h = (blitter.size >> 16) & 0x7ff;
+ sstrd = blitter.srcstride;
+ dstrd = blitter.dststride;
+
+ // XXX: need to confirm this..
+ addr = (blitter.dstaddr & ~3) | ((blitter.dstctrl & 0x1f) >> 3);
+ dst = blitter_mem_lookup(addr, &dste, &dstrd, &to_screen);
+ if (dst == NULL)
+ goto bad_blit;
+
+ // 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 = blitter_mem_lookup(addr, &srce, &sstrd, &to_screen);
+ 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 + dstrd * h > dste) {
+ 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) {
+ 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);
+ }
+ }
+ 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 (to_screen)
+ host_screen = host_video_flip();
+ 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(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 ", a, 0, 8);
+ iolog_unh("r8 ", a, 0, 8);
+ return 0;
}
static u32 xread16(u32 a)
{
- volatile u16 *mem;
- u32 mask;
+ 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;
+ }
- iolog("r16 %08x\n", a);
- mem = translate_addr(a, &mask);
- return mem[(a & mask) / 2];
+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)
{
- volatile u32 *mem;
- u32 mask;
+ u32 d = 0;
+ if ((a & 0xfff00000) == 0x7f100000) {
+ u32 *bl = &blitter.dstctrl;
+ u32 a_ = a & 0xfff;
+ if (a_ < 0x40) {
+ d = bl[a_ / 4];
+ if (a_ == 0x34)
+ d = 0; // not busy
+ goto out;
+ }
+ }
+ iolog_unh("r32", a, d, 32);
- iolog("r32 %08x\n", a);
- mem = translate_addr(a, &mask);
- return mem[(a & mask) / 4];
+out:
+ iolog("r32", a, d, 32);
+ return d;
}
static void xwrite8(u32 a, u32 d)
{
- volatile u8 *mem;
- u32 mask;
-
- iolog("w8 %08x %08x\n", a, d);
- mem = translate_addr(a, &mask);
- mem[a & mask] = d;
+ iolog("w8 ", a, d, 8);
+ iolog_unh("w8 ", a, d, 8);
}
static void xwrite16(u32 a, u32 d)
{
- volatile u16 *mem;
- u32 mask;
-
- iolog("w16 %08x %08x\n", a, d);
- mem = translate_addr(a, &mask);
- mem[(a & mask) / 2] = d;
+ iolog("w16", a, d, 16);
+ if ((a & 0xfff00000) == 0x7f000000) {
+ 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;
+ }
+ }
+ iolog_unh("w16", a, d, 16);
}
static void xwrite32(u32 a, u32 d)
{
- volatile u32 *mem;
- u32 mask;
+ iolog("w32", a, d, 32);
- iolog("w32 %08x %08x\n", a, d);
- mem = translate_addr(a, &mask);
- mem[(a & mask) / 4] = d;
+ if ((a & 0xfff00000) == 0x7f100000) {
+ u32 *bl = &blitter.dstctrl;
+ 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 addr_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;
rn = (op & 0x000f0000) >> 16;
if ((op & 0x0f200090) == 0x01000090) { // AM3: LDRH, STRH
- if (BIT_SET(op, 6)) // S
+ if (!BIT_SET(op, 5)) // !H
+ goto unhandled;
+ if (BIT_SET(op, 6) && !BIT_SET(op, 20)) // S && !L
goto unhandled;
if (BIT_SET(op, 22)) // imm offset
if (BIT_SET(op, 20)) { // Load
ret = xread16(addr);
+ if (BIT_SET(op, 6)) { // S
+ ret <<= 16;
+ ret = (signed int)ret >> 16;
+ }
regs[rd] = ret;
}
else
else
goto unhandled;
+#if 0
if (addr != addr_check) {
fprintf(stderr, "bad calculated addr: %08x vs %08x\n", addr, addr_check);
abort();
}
+#endif
return;
unhandled:
- fprintf(stderr, "unhandled IO op %08x @ %08x\n", op, addr_pc);
+ err("unhandled IO op %08x @ %08x\n", op, op_ctx->pc);
}
-static void segv_sigaction(int num, siginfo_t *info, void *ctx)
+static u32 make_offset12(u32 *pc, u32 *target)
{
- struct ucontext *context = ctx;
- u32 *regs = (u32 *)&context->uc_mcontext.arm_r0;
- u32 op = *(u32 *)regs[15];
-
- //printf("segv %d %p @ %08x\n", info->si_code, info->si_addr, regs[15]);
-/*
- static int thissec, sfps;
- struct timeval tv;
- gettimeofday(&tv, NULL);
- sfps++;
- if (tv.tv_sec != thissec) {
- printf("%d\n", sfps);
- sfps = 0;
- thissec = tv.tv_sec;
- }
-*/
-
- handle_op(regs[15], op, regs, (u32)info->si_addr);
- regs[15] += 4;
- return;
+ int lp_offs, u = 1;
+
+ lp_offs = (char *)target - (char *)pc - 2*4;
+ if (lp_offs < 0) {
+ lp_offs = -lp_offs;
+ u = 0;
+ }
+ if (lp_offs >= LINKPAGE_SIZE) {
+ err("linkpage too far: %d\n", lp_offs);
+ abort();
+ }
- //signal(num, SIG_DFL);
- //raise(num);
+ return (u << 23) | lp_offs;
}
-#define LINKPAGE_SIZE 0x1000
+static u32 make_jmp(u32 *pc, u32 *target, int bl)
+{
+ int jmp_val;
-struct linkpage {
- u32 (*xread8)(u32 a);
- u32 (*xread16)(u32 a);
- u32 (*xread32)(u32 a);
- void (*xwrite8)(u32 a, u32 d);
- void (*xwrite16)(u32 a, u32 d);
- void (*xwrite32)(u32 a, u32 d);
- u32 retval;
- u32 *reg_ptr;
- u32 saved_regs[6]; // r0-r3,r12,lr
- u32 code[0];
-};
+ jmp_val = target - pc - 2;
+ if (jmp_val < (int)0xff000000 || jmp_val > 0x00ffffff) {
+ err("jump out of range (%p -> %p)\n", pc, target);
+ abort();
+ }
-static struct linkpage *g_linkpage;
-static u32 *g_code_ptr;
+ return 0xea000000 | (bl << 24) | (jmp_val & 0x00ffffff);
+}
+
+static void emit_op(u32 op)
+{
+ *g_code_ptr++ = op;
+}
+
+static void emit_op_io(u32 op, u32 *target)
+{
+ op |= make_offset12(g_code_ptr, target);
+ 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];
+ 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
+ ((long)info->si_addr & 0xffe00000) != 0x7f000000) // faulting not where expected
+ {
+ // real crash - time to die
+ 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
+ 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, 0);
+
+ // generate code:
+ // 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;
+ 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) {
+ err("too many linkpages needed\n");
+ abort();
+ }
+ g_linkpage = (void *)((char *)g_linkpage + LINKPAGE_SIZE);
+ init_linkpage();
+ }
+ //handle_op(regs[15], op, regs, (u32)info->si_addr);
+ //regs[15] += 4;
+}
void emu_init(void *map_bottom)
{
.sa_sigaction = segv_sigaction,
.sa_flags = SA_SIGINFO,
};
- struct linkpage init_linkpage = {
- .xread8 = xread8,
- .xread16 = xread16,
- .xread32 = xread32,
- .xwrite8 = xwrite8,
- .xwrite16 = xwrite16,
- .xwrite32 = xwrite32,
- };
- void *ret;
+ void *pret;
+ int ret;
sigemptyset(&segv_action.sa_mask);
sigaction(SIGSEGV, &segv_action, NULL);
- g_linkpage = (void *)(((u32)map_bottom - LINKPAGE_SIZE) & ~0xfff);
- ret = mmap(g_linkpage, LINKPAGE_SIZE, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
- if (ret != g_linkpage) {
- perror("mmap linkpage");
+ 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);
}
- printf("linkpage @ %p\n", g_linkpage);
- memcpy(g_linkpage, &init_linkpage, sizeof(*g_linkpage));
- g_linkpage->reg_ptr = g_linkpage->saved_regs;
- g_code_ptr = g_linkpage->code;
+ 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);
+ 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);
+ init_linkpage();
- memdev = open("/dev/mem", O_RDWR);
- memregs = mmap(NULL, 0x10000, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0xc0000000);
- blitter = mmap(NULL, 0x100, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0xe0020000);
- printf("mapped %d %p %p\n", memdev, memregs, blitter);
+ // host stuff
+ ret = host_video_init(&host_stride, 0);
+ if (ret != 0) {
+ err("can't alloc screen\n");
+ exit(1);
+ }
+ host_screen = host_video_flip();
+}
+
+int emu_read_gpiodev(void *buf, int count)
+{
+ unsigned int btns;
+
+ if (count < 4) {
+ err("gpiodev read %d?\n", count);
+ return -1;
+ }
+
+ btns = host_read_btns();
+ memcpy(buf, &btns, 4);
+ return 4;
}
void *emu_mmap_dev(unsigned int length, int prot, int flags, unsigned int offset)
{
+ struct uppermem_block *umem;
char name[32];
int fd;
+ // SoC regs
if ((offset & ~0xffff) == 0xc0000000) {
return mmap((void *)0x7f000000, length, PROT_NONE,
MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED|MAP_NORESERVE, -1, 0);
}
+ // blitter
if ((offset & ~0xffff) == 0xe0020000) {
return mmap((void *)0x7f100000, length, PROT_NONE,
MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED|MAP_NORESERVE, -1, 0);
}
- // pass through
- if ((offset & 0xfe000000) == 0x02000000)
- return mmap(NULL, length, prot, flags, memdev, offset);
+ // upper mem
+ if ((offset & 0xfe000000) != 0x02000000)
+ err("unexpected devmem mmap @ %08x\n", offset);
+ // return mmap(NULL, length, prot, flags, memdev, offset);
+
+ umem = calloc(1, sizeof(*umem));
+ if (umem == NULL) {
+ printf("OOM\n");
+ return MAP_FAILED;
+ }
+
+ 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);
- return mmap(NULL, length, prot, MAP_SHARED, fd, 0);
+ umem->mem = mmap(NULL, length, prot, MAP_SHARED, fd, 0);
+ if (umem->mem == MAP_FAILED) {
+ err("failed, giving up\n");
+ close(fd);
+ free(umem);
+ return MAP_FAILED;
+ }
+
+done:
+ printf("upper mem @ %08x %d\n", offset, length);
+ umem->next = upper_mem;
+ upper_mem = umem;
+ return umem->mem;
}
notaz.gp2x.de / ginge.git / blobdiff