platform/wavelet3d/host_sw: implement firmware loading

1 files changed, 82 insertions, 0 deletions

diff --git a/platform/wavelet3d/host_sw/sgdma.c b/platform/wavelet3d/host_sw/sgdma.c
new file mode 100644
index 0000000..11241f8
--- /dev/null
+++ b/platform/wavelet3d/host_sw/sgdma.c
@@ -0,0 +1,82 @@
+#define MOD_NAME "dma"
+
+#include <stddef.h>
+
+#include "log.h"
+#include "sgdma.h"
+
+struct sgdma_ctrl
+{
+	unsigned start_busy : 1;
+	unsigned interrupt  : 1;
+	unsigned int_en     : 1;
+	unsigned abort      : 1;
+	unsigned err        : 1;
+	unsigned reserved   : 27;
+};
+
+struct sgdma_entry
+{
+	unsigned src_lo;
+	unsigned src_hi   : 30;
+	unsigned flags    : 2;
+	unsigned dst_lo;
+	unsigned dst_hi   : 30;
+	unsigned mbz      : 1;
+	unsigned int_en   : 1;
+	unsigned length;
+};
+
+// axisgfsm.v, la lista de axisgdma.v está mala
+enum sgdma_entry_flags
+{
+	SGDMA_ENTRY_CONT = 0b00,
+	SGDMA_ENTRY_LAST = 0b01,
+	SGDMA_ENTRY_SKIP = 0b10,
+	SGDMA_ENTRY_JUMP = 0b11,
+};
+
+#define SGDMA_BASE  0x28000000
+#define SGDMA_CTRL  (*(volatile struct sgdma_ctrl *)(SGDMA_BASE + 0x00))
+#define SGDMA_TBLLO (*(volatile unsigned *)         (SGDMA_BASE + 0x08))
+#define SGDMA_TBLHI (*(volatile unsigned *)         (SGDMA_BASE + 0x0c))
+
+int sgdma_done(void)
+{
+	return !SGDMA_CTRL.start_busy;
+}
+
+void sgdma_barrier(void)
+{
+	while (!sgdma_done()); //FIXME
+}
+
+void sgdma_memcpy(void *dest, const void *src, size_t len)
+{
+	struct sgdma_entry entry = {
+		.src_lo = (unsigned)src,
+		.src_hi = 0,
+		.flags  = SGDMA_ENTRY_LAST,
+		.dst_lo = (unsigned)dest,
+		.dst_hi = 0,
+		.mbz    = 0,
+		.int_en = 0,
+		.length = (unsigned)len,
+	};
+
+	SGDMA_TBLLO = (unsigned)&entry;
+	SGDMA_TBLHI = 0;
+
+	struct sgdma_ctrl ctrl = {
+		.start_busy = 1,
+		.interrupt  = 0,
+		.int_en     = 0,
+		.abort      = 0,
+		.err        = 0,
+		.reserved   = 0,
+	};
+
+	SGDMA_CTRL = ctrl;
+
+	sgdma_barrier(); //TODO, sin esto sgdma lee entry corrupto
+}