From: kub <derkub@gmail.com>
Date: Thu, 22 Apr 2021 21:23:54 +0000 (+0200)
Subject: fixes for big endian (mostly mcd)
X-Git-Tag: v2.00~540
X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0d8d97f87c8c13a7883682cce01cf65b112dbfb7;p=picodrive.git

fixes for big endian (mostly mcd)
---

diff --git a/pico/cart.c b/pico/cart.c
index 81fc7fb0..1804db28 100644
--- a/pico/cart.c
+++ b/pico/cart.c
@@ -187,7 +187,7 @@ zip_failed:
   else if (strcasecmp(ext, "cso") == 0)
   {
     cso_struct *cso = NULL, *tmp = NULL;
-    int size;
+    int i, size;
     f = fopen(path, "rb");
     if (f == NULL)
       goto cso_failed;
@@ -229,6 +229,8 @@ zip_failed:
       elprintf(EL_STATUS, "cso: premature EOF");
       goto cso_failed;
     }
+    for (i = 0; i < size/4; i++)
+      cso->index[i] = CPU_LE4(cso->index[i]);
 
     // all ok
     cso->fpos_in = ftell(f);
@@ -280,7 +282,7 @@ cso_failed:
     chd->file.file = chd;
     chd->file.type = PMT_CHD;
     // subchannel data is skipped, remove it from total size
-    chd->file.size = chd_get_header(cf)->logicalbytes / CD_FRAME_SIZE * CD_MAX_SECTOR_DATA;
+    chd->file.size = head->logicalbytes / CD_FRAME_SIZE * CD_MAX_SECTOR_DATA;
     strncpy(chd->file.ext, ext, sizeof(chd->file.ext) - 1);
     return &chd->file;
 
@@ -359,7 +361,7 @@ static size_t _pm_read_chd(void *ptr, size_t bytes, pm_file *stream, int is_audi
       if (len > bytes)
         len = bytes;
 
-#ifdef CPU_IS_LE
+#if CPU_IS_LE
       if (is_audio) {
         // convert big endian audio samples
         u16 *dst = ptr, v;
@@ -1309,7 +1311,7 @@ static void PicoCartDetect(const char *carthw_cfg)
 
   // Unusual region 'code'
   if (rom_strcmp(0x1f0, "EUROPE") == 0 || rom_strcmp(0x1f0, "Europe") == 0)
-    *(int *) (Pico.rom + 0x1f0) = 0x20204520;
+    *(u32 *) (Pico.rom + 0x1f0) = CPU_LE4(0x20204520);
 }
 
 // vim:shiftwidth=2:expandtab
diff --git a/pico/cd/memory.c b/pico/cd/memory.c
index 7cf9ffd5..a315391f 100644
--- a/pico/cd/memory.c
+++ b/pico/cd/memory.c
@@ -205,10 +205,10 @@ void m68k_reg_write8(u32 a, u32 d)
 
       goto write_comm;
     case 6:
-      Pico_mcd->bios[0x72 + 1] = d; // simple hint vector changer
+      Pico_mcd->bios[MEM_BE2(0x72)] = d; // simple hint vector changer
       return;
     case 7:
-      Pico_mcd->bios[0x72] = d;
+      Pico_mcd->bios[MEM_BE2(0x73)] = d;
       elprintf(EL_CDREGS, "hint vector set to %04x%04x",
         ((u16 *)Pico_mcd->bios)[0x70/2], ((u16 *)Pico_mcd->bios)[0x72/2]);
       return;
@@ -277,7 +277,7 @@ u32 s68k_poll_detect(u32 a, u32 d)
 
 #define READ_FONT_DATA(basemask) \
 { \
-      unsigned int fnt = *(unsigned int *)(Pico_mcd->s68k_regs + 0x4c); \
+      unsigned int fnt = CPU_LE4(*(u32 *)(Pico_mcd->s68k_regs + 0x4c)); \
       unsigned int col0 = (fnt >> 8) & 0x0f, col1 = (fnt >> 12) & 0x0f;   \
       if (fnt & (basemask << 0)) d  = col1      ; else d  = col0;       \
       if (fnt & (basemask << 1)) d |= col1 <<  4; else d |= col0 <<  4; \
diff --git a/pico/cd/pcm.c b/pico/cd/pcm.c
index 27fb2ac9..f1375f34 100644
--- a/pico/cd/pcm.c
+++ b/pico/cd/pcm.c
@@ -88,7 +88,7 @@ void pcd_pcm_sync(unsigned int to)
     }
 
     addr = ch->addr;
-    inc = *(unsigned short *)&ch->regs[2];
+    inc = ch->regs[2] + (ch->regs[3]<<8);
     mul_l = ((int)ch->regs[0] * (ch->regs[1] & 0xf)) >> (5+1); 
     mul_r = ((int)ch->regs[0] * (ch->regs[1] >>  4)) >> (5+1);
 
@@ -99,7 +99,7 @@ void pcd_pcm_sync(unsigned int to)
       // test for loop signal
       if (smp == 0xff)
       {
-        addr = *(unsigned short *)&ch->regs[4]; // loop_addr
+        addr = ch->regs[4] + (ch->regs[5]<<8); // loop_addr
         smp = Pico_mcd->pcm_ram[addr];
         addr <<= PCM_STEP_SHIFT;
         if (smp == 0xff)
diff --git a/pico/pico_port.h b/pico/pico_port.h
index a5f8a582..d2b78e05 100644
--- a/pico/pico_port.h
+++ b/pico/pico_port.h
@@ -57,7 +57,7 @@
 #define MEM_LE2(a)	(a)
 #define MEM_LE4(a)	(a)
 // swapping
-#define CPU_BE2(v)	((u32)((u64)(v)<<16)|((v)>>16))
+#define CPU_BE2(v)	((u32)((u64)(v)<<16)|((u32)(v)>>16))
 #define CPU_BE4(v)	(((u32)(v)>>24)|(((v)>>8)&0x00ff00)| \
 			(((v)<<8)&0xff0000)|(u32)((v)<<24))
 #define CPU_LE2(v)	(v)		// swap of 2*u16 in u32
@@ -71,7 +71,7 @@
 // swapping
 #define CPU_BE2(v)	(v)
 #define CPU_BE4(v)	(v)
-#define CPU_LE2(v)	((u32)((u64)(v)<<16)|((v)>>16))
+#define CPU_LE2(v)	((u32)((u64)(v)<<16)|((u32)(v)>>16))
 #define CPU_LE4(v)	(((u32)(v)>>24)|(((v)>>8)&0x00ff00)| \
 			(((v)<<8)&0xff0000)|(u32)((v)<<24))
 #endif