-// The SVP chip emulator, mem I/O stuff
-
-// (c) Copyright 2008, Grazvydas "notaz" Ignotas
-// Free for non-commercial use.
-
-// For commercial use, separate licencing terms must be obtained.
-
+/*
+ * The SVP chip emulator, mem I/O stuff
+ *
+ * Copyright (c) GraÅžvydas "notaz" Ignotas, 2008
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * * Neither the name of the organization nor the
+ * names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
#include "../../pico_int.h"
+#include "../../memory.h"
-#ifndef UTYPES_DEFINED
-typedef unsigned char u8;
-typedef unsigned short u16;
-typedef unsigned int u32;
-#define UTYPES_DEFINED
-#endif
+// for wait loop det
+static void PicoWrite16_dram(u32 a, u32 d)
+{
+ a &= ~0xfe0000;
-#define CLEAR_DETECT(pc_start,pc_end,text) \
- if (d == 0 && SekPc >= pc_start && SekPc < pc_end) \
- { \
- if (!clearing_ram) \
- elprintf(EL_SVP, text); \
- clearing_ram = 1; \
- return; \
+ if (d != 0) {
+ if (a == 0xfe06) // 30fe06
+ svp->ssp1601.emu_status &= ~SSP_WAIT_30FE06;
+ else if (a == 0xfe08)
+ svp->ssp1601.emu_status &= ~SSP_WAIT_30FE08;
}
-unsigned int PicoSVPRead16(unsigned int a, int realsize)
+ ((u16 *)svp->dram)[a / 2] = d;
+}
+
+// "cell arrange" 1: 390000-39ffff
+static u32 PicoRead16_svpca1(u32 a)
{
- unsigned int d = 0;
- static int a15004_looping = 0;
-
- // dram: 300000-31ffff
- if ((a & 0xfe0000) == 0x300000)
- d = *(u16 *)(svp->dram + (a&0x1fffe));
-
- // "cell arrange" 1: 390000-39ffff
- else if ((a & 0xff0000) == 0x390000) {
- // this is rewritten 68k code
- unsigned int a1 = a >> 1;
- a1 = (a1 & 0x7001) | ((a1 & 0x3e) << 6) | ((a1 & 0xfc0) >> 5);
- d = ((u16 *)svp->dram)[a1];
- }
+ // this is 68k code rewritten
+ u32 a1 = a >> 1;
+ a1 = (a1 & 0x7001) | ((a1 & 0x3e) << 6) | ((a1 & 0xfc0) >> 5);
+ return ((u16 *)svp->dram)[a1];
+}
- // "cell arrange" 2: 3a0000-3affff
- else if ((a & 0xff0000) == 0x3a0000) {
- // this is rewritten 68k code
- unsigned int a1 = a >> 1;
- a1 = (a1 & 0x7801) | ((a1 & 0x1e) << 6) | ((a1 & 0x7e0) >> 4);
- d = ((u16 *)svp->dram)[a1];
- }
+// "cell arrange" 2: 3a0000-3affff
+static u32 PicoRead16_svpca2(u32 a)
+{
+ u32 a1 = a >> 1;
+ a1 = (a1 & 0x7801) | ((a1 & 0x1e) << 6) | ((a1 & 0x7e0) >> 4);
+ return ((u16 *)svp->dram)[a1];
+}
+
+// IO/control area (0xa10000 - 0xa1ffff)
+static u32 PicoRead16_svpr(u32 a)
+{
+ u32 d = 0;
// regs
- else if ((a & 0xfffff0) == 0xa15000) {
+ if ((a & ~0x0f) == 0xa15000) {
switch (a & 0xf) {
case 0:
case 2:
case 4:
d = svp->ssp1601.gr[SSP_PM0].h;
svp->ssp1601.gr[SSP_PM0].h &= ~1;
- if (d&1) a15004_looping = 0;
break;
}
- }
- else
- elprintf(EL_UIO|EL_SVP|EL_ANOMALY, "SVP FIXME: unhandled r%i: [%06x] %04x @%06x", realsize, a&0xffffff, d, SekPc);
- if (!a15004_looping)
- elprintf(EL_SVP, "SVP r%i: [%06x] %04x @%06x", realsize, a&0xffffff, d, SekPc);
-
- if (a == 0xa15004 && !(d&1)) {
- if (!a15004_looping)
- elprintf(EL_SVP, "SVP det TIGHT loop: a15004");
- a15004_looping = 1;
+#if EL_LOGMASK & EL_SVP
+ {
+ static int a15004_looping = 0;
+ if (a == 0xa15004 && (d & 1))
+ a15004_looping = 0;
+
+ if (!a15004_looping)
+ elprintf(EL_SVP, "SVP r%i: [%06x] %04x @%06x", realsize, a, d, SekPc);
+
+ if (a == 0xa15004 && !(d&1)) {
+ if (!a15004_looping)
+ elprintf(EL_SVP, "SVP det TIGHT loop: a15004");
+ a15004_looping = 1;
+ }
+ else
+ a15004_looping = 0;
+ }
+#endif
+ return d;
}
- else a15004_looping = 0;
//if (a == 0x30fe02 && d == 0)
// elprintf(EL_ANOMALY, "SVP lag?");
- return d;
+ return PicoRead16_io(a);
}
-void PicoSVPWrite8(unsigned int a, unsigned int d, int realsize)
+// used in VR test mode
+static u32 PicoRead8_svpr(u32 a)
{
- elprintf(EL_UIO|EL_SVP|EL_ANOMALY, "!!! SVP w%i: [%06x], %08x @%06x", realsize, a&0xffffff, d, SekPc);
+ u32 d;
+
+ if ((a & ~0x0f) != 0xa15000)
+ return PicoRead8_io(a);
+
+ d = PicoRead16_svpr(a & ~1);
+ if (!(a & 1))
+ d >>= 8;
+ return d;
}
-void PicoSVPWrite16(unsigned int a, unsigned int d, int realsize)
+static void PicoWrite16_svpr(u32 a, u32 d)
{
- static int clearing_ram = 0;
+ elprintf(EL_SVP, "SVP w16: [%06x] %04x @%06x", a, d, SekPc);
- // DRAM
- if ((a & 0xfe0000) == 0x300000)
- *(u16 *)(svp->dram + (a&0x1fffe)) = d;
-
- // regs
- else if ((a & 0xfffff0) == 0xa15000) {
+ if ((a & ~0x0f) == 0xa15000) {
if (a == 0xa15000 || a == 0xa15002) {
// just guessing here
svp->ssp1601.gr[SSP_XST].h = d;
}
//else if (a == 0xa15006) svp->ssp1601.gr[SSP_PM0].h = d | (d << 1);
// 0xa15006 probably has 'halt'
+ return;
}
- else
- elprintf(EL_UIO|EL_SVP|EL_ANOMALY, "SVP FIXME: unhandled w%i: [%06x] %04x @%06x", realsize, a&0xffffff, d, SekPc);
+ PicoWrite16_io(a, d);
+}
- if (a == 0x30fe06 && d != 0)
- svp->ssp1601.emu_status &= ~SSP_WAIT_30FE06;
-
- if (a == 0x30fe08 && d != 0)
- svp->ssp1601.emu_status &= ~SSP_WAIT_30FE08;
+void PicoSVPMemSetup(void)
+{
+ // 68k memmap:
+ // DRAM
+ cpu68k_map_set(m68k_read8_map, 0x300000, 0x31ffff, svp->dram, 0);
+ cpu68k_map_set(m68k_read16_map, 0x300000, 0x31ffff, svp->dram, 0);
+ cpu68k_map_set(m68k_write8_map, 0x300000, 0x31ffff, svp->dram, 0);
+ cpu68k_map_set(m68k_write16_map, 0x300000, 0x31ffff, svp->dram, 0);
+ cpu68k_map_set(m68k_write16_map, 0x300000, 0x30ffff, PicoWrite16_dram, 1);
- // debug: detect RAM clears..
- CLEAR_DETECT(0x0221dc, 0x0221f0, "SVP RAM CLEAR (full) @ 0221C2");
- CLEAR_DETECT(0x02204c, 0x022068, "SVP RAM CLEAR 300000-31ffbf (1) @ 022032");
- CLEAR_DETECT(0x021900, 0x021ff0, "SVP RAM CLEAR 300000-305fff");
- CLEAR_DETECT(0x0220b0, 0x0220cc, "SVP RAM CLEAR 300000-31ffbf (2) @ 022096");
- clearing_ram = 0;
+ // DRAM (cell arrange)
+ cpu68k_map_set(m68k_read16_map, 0x390000, 0x39ffff, PicoRead16_svpca1, 1);
+ cpu68k_map_set(m68k_read16_map, 0x3a0000, 0x3affff, PicoRead16_svpca2, 1);
- elprintf(EL_SVP, "SVP w%i: [%06x] %04x @%06x", realsize, a&0xffffff, d, SekPc);
+ // regs
+ cpu68k_map_set(m68k_read8_map, 0xa10000, 0xa1ffff, PicoRead8_svpr, 1);
+ cpu68k_map_set(m68k_read16_map, 0xa10000, 0xa1ffff, PicoRead16_svpr, 1);
+ cpu68k_map_set(m68k_write8_map, 0xa10000, 0xa1ffff, PicoWrite8_io, 1); // PicoWrite8_svpr
+ cpu68k_map_set(m68k_write16_map, 0xa10000, 0xa1ffff, PicoWrite16_svpr, 1);
}
notaz.gp2x.de / picodrive.git / blobdiff