drc: lots of new debug code

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

diff --git a/cpu/sh2/sh2.c b/cpu/sh2/sh2.c
index 2e0e838..d185b3f 100644 (file)
--- a/cpu/sh2/sh2.c
+++ b/cpu/sh2/sh2.c
@@ -57,8 +57,7 @@ void sh2_do_irq(SH2 *sh2, int level, int vector)
        sh2->pc = p32x_sh2_read32(sh2->vbr + vector * 4, sh2);
 
        /* 13 cycles at best */
-       sh2->m68krcycles_done += C_SH2_TO_M68K(*sh2, 13);
-//     sh2->icount -= 13;
+       sh2->icount -= 13;
 }
 
 int sh2_irl_irq(SH2 *sh2, int level, int nested_call)
@@ -77,6 +76,7 @@ int sh2_irl_irq(SH2 *sh2, int level, int nested_call)
                        // do this to avoid missing irqs that other SH2 might clear
                        int vector = sh2->irq_callback(sh2, level);
                        sh2_do_irq(sh2, level, vector);
+                       sh2->m68krcycles_done += C_SH2_TO_M68K(*sh2, 13);
                }
                else
                        sh2->test_irq = 1;
@@ -120,3 +120,193 @@ void sh2_unpack(SH2 *sh2, const unsigned char *buff)
        sh2->pending_int_vector = p[1];
 }
 
+#ifdef DRC_CMP
+
+/* trace/compare */
+#include <stdio.h>
+#include <stdlib.h>
+#include <pico/memory.h>
+
+static SH2 sh2ref[2];
+static int current_slave = -1;
+static unsigned int mem_val;
+static FILE *f;
+
+#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;
+       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));
+               return (pd[0] << 16) | pd[1];
+       }
+
+       return 0;
+}
+
+static void write_uint(unsigned char ctl, unsigned int v)
+{
+       fwrite(&ctl, 1, 1, f);
+       fwrite(&v, sizeof(v), 1, f);
+}
+
+void do_sh2_trace(SH2 *current, int cycles)
+{
+       SH2 *sh2o = &sh2ref[current->is_slave];
+       u32 *regs_a = (void *)current;
+       u32 *regs_o = (void *)sh2o;
+       unsigned char v;
+       u32 val;
+       int i;
+
+       if (f == NULL)
+               f = fopen("tracelog", "wb");
+
+       if (current->is_slave != current_slave) {
+               current_slave = current->is_slave;
+               v = 0x80 | current->is_slave;
+               fwrite(&v, 1, 1, f);
+       }
+
+       for (i = 0; i < offsetof(SH2, read8_map) / 4; i++) {
+               if (i == 17) // ppc
+                       continue;
+               if (regs_a[i] != regs_o[i]) {
+                       write_uint(i, regs_a[i]);
+                       regs_o[i] = regs_a[i];
+               }
+       }
+
+       if (current->ea != sh2o->ea) {
+               write_uint(0x82, current->ea);
+               sh2o->ea = current->ea;
+       }
+       val = local_read32(current, current->ea);
+       if (mem_val != val) {
+               write_uint(0x83, val);
+               mem_val = val;
+       }
+       write_uint(0x84, cycles);
+}
+
+static const char *regnames[] = {
+       "r0",  "r1",  "r2",  "r3",
+       "r4",  "r5",  "r6",  "r7",
+       "r8",  "r9",  "r10", "r11",
+       "r12", "r13", "r14", "r15",
+       "pc",  "ppc", "pr",  "sr",
+       "gbr", "vbr", "mach","macl",
+};
+
+void do_sh2_cmp(SH2 *current)
+{
+       static int current_slave;
+       static u32 current_val;
+       SH2 *sh2o = &sh2ref[current->is_slave];
+       u32 *regs_a = (void *)current;
+       u32 *regs_o = (void *)sh2o;
+       unsigned char code;
+       int cycles_o = 666;
+       u32 sr, val;
+       int bad = 0;
+       int cycles;
+       int i, ret;
+       char csh2;
+
+       if (f == NULL)
+               f = fopen("tracelog", "rb");
+
+       while (1) {
+               ret = fread(&code, 1, 1, f);
+               if (ret <= 0)
+                       break;
+               if (code == 0x84) {
+                       fread(&cycles_o, 1, 4, f);
+                       break;
+               }
+
+               switch (code) {
+               case 0x80:
+               case 0x81:
+                       current_slave = code & 1;
+                       break;
+               case 0x82:
+                       fread(&sh2o->ea, 4, 1, f);
+                       break;
+               case 0x83:
+                       fread(&current_val, 4, 1, f);
+                       break;
+               default:
+                       if (code < offsetof(SH2, read8_map) / 4)
+                               fread(regs_o + code, 4, 1, f);
+                       else {
+                               printf("invalid code: %02x\n", code);
+                               goto end;
+                       }
+                       break;
+               }
+       }
+
+       if (ret <= 0) {
+               printf("EOF?\n");
+               goto end;
+       }
+
+       if (current->is_slave != current_slave) {
+               printf("bad slave: %d %d\n", current->is_slave,
+                       current_slave);
+               bad = 1;
+       }
+
+       for (i = 0; i < offsetof(SH2, read8_map) / 4; i++) {
+               if (i == 17 || i == 19) // ppc, sr
+                       continue;
+               if (regs_a[i] != regs_o[i]) {
+                       printf("bad %4s: %08x %08x\n",
+                               regnames[i], regs_a[i], regs_o[i]);
+                       bad = 1;
+               }
+       }
+
+       sr = current->sr & 0x3f3;
+       cycles = (signed int)current->sr >> 12;
+
+       if (sr != sh2o->sr) {
+               printf("bad SR:  %03x %03x\n", sr, sh2o->sr);
+               bad = 1;
+       }
+
+       if (cycles != cycles_o) {
+               printf("bad cycles: %d %d\n", cycles, cycles_o);
+               bad = 1;
+       }
+
+       val = local_read32(current, sh2o->ea);
+       if (val != current_val) {
+               printf("bad val @%08x: %08x %08x\n", sh2o->ea, val, current_val);
+               bad = 1;
+       }
+
+       if (!bad) {
+               sh2o->ppc = current->pc;
+               return;
+       }
+
+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);
+       exit(1);
+}
+
+#endif // DRC_CMP