spu: finish offload code to TI C64x DSP

[pcsx_rearmed.git] / plugins / dfsound / spu_c64x_dspcode.c

diff --git a/plugins/dfsound/spu_c64x_dspcode.c b/plugins/dfsound/spu_c64x_dspcode.c
new file mode 100644 (file)
index 0000000..117a296
--- /dev/null
+++ b/plugins/dfsound/spu_c64x_dspcode.c
@@ -0,0 +1,108 @@
+/*
+ * SPU processing offload to TI C64x DSP using bsp's c64_tools
+ * (C) Gražvydas "notaz" Ignotas, 2015
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy of
+ *  this software and associated documentation files (the "Software"), to deal in
+ *  the Software without restriction, including without limitation the rights to
+ *  use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ *  of the Software, and to permit persons to whom the Software is furnished to do
+ *  so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+#define SYSCALLS_C
+#include <libc64_dsp/include/inc_overlay.h>
+#include <stddef.h>
+
+#include "spu.c"
+#include "spu_c64x.h"
+
+/* dummy deps, some bloat but avoids ifdef hell in SPU code.. */
+static void thread_work_start(void) {}
+static void thread_work_wait_sync(void) {}
+static void thread_sync_caches(void) {}
+struct out_driver *out_current;
+void SetupSound(void) {}
+
+#if 0
+// no use, c64_tools does BCACHE_wbInvAll..
+static void sync_caches(void)
+{
+ int ns_to = worker->ns_to;
+
+ syscalls.cache_wb(spu.sRVBStart, sizeof(spu.sRVBStart[0]) * 2 * ns_to, 1);
+ syscalls.cache_wb(SSumLR, sizeof(SSumLR[0]) * 2 * ns_to, 1);
+
+ syscalls.cache_wbInv(worker, sizeof(*worker), 1);
+}
+#endif
+
+static unsigned int exec(dsp_component_cmd_t cmd,
+  unsigned int arg1, unsigned int arg2,
+  unsigned int *ret1, unsigned int *ret2)
+{
+ struct region_mem *mem = (void *)arg1;
+ int i;
+
+ switch (cmd) {
+  case CCMD_INIT:
+   InitADSR();
+
+   spu.spuMemC = mem->spu_ram;
+   spu.sRVBStart = mem->RVB;
+   SSumLR = mem->SSumLR;
+   spu.SB = mem->SB;
+   spu.s_chan = mem->s_chan;
+   worker = &mem->worker;
+   memcpy(&spu_config, &mem->spu_config, sizeof(spu_config));
+
+   mem->sizeof_region_mem = sizeof(*mem);
+   mem->offsetof_s_chan1 = offsetof(typeof(*mem), s_chan[1]);
+   mem->offsetof_worker_ram = offsetof(typeof(*mem), worker.ch[1]);
+   // seems to be unneeded, no write-alloc? but just in case..
+   syscalls.cache_wb(&mem->sizeof_region_mem, 3 * 4, 1);
+   break;
+
+  case CCMD_DOIT:
+   do_channel_work();
+   // c64_tools lib does BCACHE_wbInvAll() when it receives mailbox irq,
+   // so there is no benefit of syncing only what's needed.
+   // But call wbInvAll() anyway in case c64_tools is ever fixed..
+   //sync_caches();
+   syscalls.cache_wbInvAll();
+   break;
+
+  default:
+   syscalls.printf("bad cmd: %x\n", cmd);
+   break;
+ }
+
+ return 0;
+}
+
+#pragma DATA_SECTION(component_test_dsp, ".sec_com");
+dsp_component_t component_test_dsp = {
+ {
+  NULL,       /* init */
+  exec,
+  NULL,       /* exec fastcall RPC */
+  NULL,       /* exit */
+ },
+
+ COMPONENT_NAME,
+};
+
+DSP_COMPONENT_MAIN
+
+// vim:shiftwidth=1:expandtab