drc: debug improvements

[picodrive.git] / cpu / sh2 / sh2.c

diff --git a/cpu/sh2/sh2.c b/cpu/sh2/sh2.c
index 5736908..fbf0c6d 100644 (file)
--- a/cpu/sh2/sh2.c
+++ b/cpu/sh2/sh2.c
@@ -45,6 +45,8 @@ void sh2_reset(SH2 *sh2)
 
 void sh2_do_irq(SH2 *sh2, int level, int vector)
 {
+       sh2->sr &= 0x3f3;
+
        sh2->r[15] -= 4;
        p32x_sh2_write32(sh2->r[15], sh2->sr, sh2);     /* push SR onto stack */
        sh2->r[15] -= 4;
@@ -127,24 +129,50 @@ void sh2_unpack(SH2 *sh2, const unsigned char *buff)
 #include <stdio.h>
 #include <stdlib.h>
 #include <pico/memory.h>
+#undef _USE_CZ80 // HACK
+#include <pico/pico_int.h>
+#include <pico/debug.h>
 
 static SH2 sh2ref[2];
-static int current_slave = -1;
 static unsigned int mem_val;
 static FILE *f;
 
+enum ctl_byte {
+       CTL_MASTERSLAVE = 0x80,
+       CTL_EA = 0x82,
+       CTL_EAVAL = 0x83,
+       CTL_M68KPC = 0x84,
+       CTL_CYCLES = 0x85,
+};
+
 #define SH2MAP_ADDR2OFFS_R(a) \
   ((((a) >> 25) & 3) | (((a) >> 27) & 0x1c))
 
 static unsigned int local_read32(SH2 *sh2, u32 a)
 {
        const sh2_memmap *sh2_map = sh2->read16_map;
+       u16 *pd;
        uptr p;
 
        sh2_map += SH2MAP_ADDR2OFFS_R(a);
        p = sh2_map->addr;
        if (!map_flag_set(p)) {
-               u16 *pd = (u16 *)((p << 1) + ((a & sh2_map->mask) & ~3));
+               pd = (u16 *)((p << 1) + ((a & sh2_map->mask) & ~1));
+               return (pd[0] << 16) | pd[1];
+       }
+
+       if ((a & 0xfffff000) == 0xc0000000) {
+               // data array
+               pd = (u16 *)Pico32xMem->data_array[sh2->is_slave]
+                       + (a & 0xfff) / 2;
+               return (pd[0] << 16) | pd[1];
+       }
+       if ((a & 0xdfffffc0) == 0x4000) {
+               pd = &Pico32x.regs[(a & 0x3f) / 2];
+               return (pd[0] << 16) | pd[1];
+       }
+       if ((a & 0xdffffe00) == 0x4200) {
+               pd = &Pico32xMem->pal[(a & 0x1ff) / 2];
                return (pd[0] << 16) | pd[1];
        }
 
@@ -159,6 +187,8 @@ static void write_uint(unsigned char ctl, unsigned int v)
 
 void do_sh2_trace(SH2 *current, int cycles)
 {
+       static int current_slave = -1;
+       static u32 current_m68k_pc;
        SH2 *sh2o = &sh2ref[current->is_slave];
        u32 *regs_a = (void *)current;
        u32 *regs_o = (void *)sh2o;
@@ -169,9 +199,14 @@ void do_sh2_trace(SH2 *current, int cycles)
        if (f == NULL)
                f = fopen("tracelog", "wb");
 
+       if (SekPc != current_m68k_pc) {
+               current_m68k_pc = SekPc;
+               write_uint(CTL_M68KPC, current_m68k_pc);
+       }
+
        if (current->is_slave != current_slave) {
                current_slave = current->is_slave;
-               v = 0x80 | current->is_slave;
+               v = CTL_MASTERSLAVE | current->is_slave;
                fwrite(&v, 1, 1, f);
        }
 
@@ -185,15 +220,15 @@ void do_sh2_trace(SH2 *current, int cycles)
        }
 
        if (current->ea != sh2o->ea) {
-               write_uint(0x82, current->ea);
+               write_uint(CTL_EA, current->ea);
                sh2o->ea = current->ea;
        }
        val = local_read32(current, current->ea);
        if (mem_val != val) {
-               write_uint(0x83, val);
+               write_uint(CTL_EAVAL, val);
                mem_val = val;
        }
-       write_uint(0x84, cycles);
+       write_uint(CTL_CYCLES, cycles);
 }
 
 static const char *regnames[] = {
@@ -205,6 +240,19 @@ static const char *regnames[] = {
        "gbr", "vbr", "mach","macl",
 };
 
+static void dump_regs(SH2 *sh2)
+{
+       char csh2;
+       int i;
+
+       csh2 = sh2->is_slave ? 's' : 'm';
+       for (i = 0; i < 16/2; i++)
+               printf("%csh2 r%d: %08x r%02d: %08x\n", csh2,
+                       i, sh2->r[i], i+8, sh2->r[i+8]);
+       printf("%csh2 PC: %08x  ,   %08x\n", csh2, sh2->pc, sh2->ppc);
+       printf("%csh2 SR:      %03x  PR: %08x\n", csh2, sh2->sr, sh2->pr);
+}
+
 void do_sh2_cmp(SH2 *current)
 {
        static int current_slave;
@@ -218,31 +266,39 @@ void do_sh2_cmp(SH2 *current)
        int bad = 0;
        int cycles;
        int i, ret;
-       char csh2;
 
-       if (f == NULL)
+       if (f == NULL) {
                f = fopen("tracelog", "rb");
+               sh2ref[1].is_slave = 1;
+       }
 
        while (1) {
                ret = fread(&code, 1, 1, f);
                if (ret <= 0)
                        break;
-               if (code == 0x84) {
+               if (code == CTL_CYCLES) {
                        fread(&cycles_o, 1, 4, f);
                        break;
                }
 
                switch (code) {
-               case 0x80:
-               case 0x81:
+               case CTL_MASTERSLAVE:
+               case CTL_MASTERSLAVE + 1:
                        current_slave = code & 1;
                        break;
-               case 0x82:
+               case CTL_EA:
                        fread(&sh2o->ea, 4, 1, f);
                        break;
-               case 0x83:
+               case CTL_EAVAL:
                        fread(&current_val, 4, 1, f);
                        break;
+               case CTL_M68KPC:
+                       fread(&val, 4, 1, f);
+                       if (SekPc != val) {
+                               printf("m68k: %08x %08x\n", SekPc, val);
+                               bad = 1;
+                       }
+                       break;
                default:
                        if (code < offsetof(SH2, read8_map) / 4)
                                fread(regs_o + code, 4, 1, f);
@@ -301,12 +357,10 @@ void do_sh2_cmp(SH2 *current)
 
 end:
        printf("--\n");
-       csh2 = current->is_slave ? 's' : 'm';
-       for (i = 0; i < 16/2; i++)
-               printf("%csh2 r%d: %08x r%02d: %08x\n", csh2,
-                       i, sh2o->r[i], i+8, sh2o->r[i+8]);
-       printf("%csh2 PC: %08x  ,   %08x\n", csh2, sh2o->pc, sh2o->ppc);
-       printf("%csh2 SR:      %03x  PR: %08x\n", csh2, sh2o->sr, sh2o->pr);
+       dump_regs(sh2o);
+       if (current->is_slave != current_slave)
+               dump_regs(&sh2ref[current->is_slave ^ 1]);
+       PDebugDumpMem();
        exit(1);
 }