From 9a642caee770db2632f4daa842b10801b47ffbfc Mon Sep 17 00:00:00 2001
From: bunnei <ericbunnie@gmail.com>
Date: Thu, 15 May 2014 23:39:06 -0400
Subject: added missing skyeye mmu code

---
 src/core/arm/interpreter/mmu/wb.cpp | 149 ++++++++++++++++++++++++++++++++++++
 1 file changed, 149 insertions(+)
 create mode 100644 src/core/arm/interpreter/mmu/wb.cpp

(limited to 'src/core/arm/interpreter/mmu/wb.cpp')

diff --git a/src/core/arm/interpreter/mmu/wb.cpp b/src/core/arm/interpreter/mmu/wb.cpp
new file mode 100644
index 000000000..82c0cec02
--- /dev/null
+++ b/src/core/arm/interpreter/mmu/wb.cpp
@@ -0,0 +1,149 @@
+#include "core/arm/interpreter/armdefs.h"
+
+/* wb_init
+ * @wb_t	:wb_t to init
+ * @num		:num of entrys
+ * @nb		:num of byte of each entry
+ *
+ * $	-1:error
+ * 		 0:ok
+ * */
+int
+mmu_wb_init (wb_s * wb_t, int num, int nb)
+{
+	int i;
+	wb_entry_t *entrys, *wb;
+
+	entrys = (wb_entry_t *) malloc (sizeof (*entrys) * num);
+	if (entrys == NULL) {
+		ERROR_LOG(ARM11, "malloc size %d\n", sizeof (*entrys) * num);
+		goto entrys_malloc_error;
+	}
+
+	for (wb = entrys, i = 0; i < num; i++, wb++) {
+		/*chy 2004-06-06, fix bug found by wenye@cs.ucsb.edu */
+		//wb->data = (ARMword *)malloc(sizeof(ARMword) * nb);
+		wb->data = (ARMbyte *) malloc (nb);
+		if (wb->data == NULL) {
+			ERROR_LOG(ARM11, "malloc size of %d\n", nb);
+			goto data_malloc_error;
+		}
+
+	};
+
+	wb_t->first = wb_t->last = wb_t->used = 0;
+	wb_t->num = num;
+	wb_t->nb = nb;
+	wb_t->entrys = entrys;
+	return 0;
+
+      data_malloc_error:
+	while (--i >= 0)
+		free (entrys[i].data);
+	free (entrys);
+      entrys_malloc_error:
+	return -1;
+};
+
+/* wb_exit
+ * @wb_t :wb_t to exit
+ * */
+void
+mmu_wb_exit (wb_s * wb_t)
+{
+	int i;
+	wb_entry_t *wb;
+
+	wb = wb_t->entrys;
+	for (i = 0; i < wb_t->num; i++, wb++) {
+		free (wb->data);
+	}
+	free (wb_t->entrys);
+};
+
+/* wb_write_words :put words in Write Buffer
+ * @state:	ARMul_State
+ * @wb_t:	write buffer
+ * @pa:		physical address
+ * @data:	data ptr
+ * @n		number of word to write
+ *
+ * Note: write buffer merge is not implemented, can be done late
+ * */
+void
+mmu_wb_write_bytes (ARMul_State * state, wb_s * wb_t, ARMword pa,
+		    ARMbyte * data, int n)
+{
+	int i;
+	wb_entry_t *wb;
+
+	while (n) {
+		if (wb_t->num == wb_t->used) {
+			/*clean the last wb entry */
+			ARMword t;
+
+			wb = &wb_t->entrys[wb_t->last];
+			t = wb->pa;
+			for (i = 0; i < wb->nb; i++) {
+				//mem_write_byte (state, t, wb->data[i]);
+				bus_write(8, t, wb->data[i]);
+				//t += WORD_SIZE;
+				t++;
+			}
+			wb_t->last++;
+			if (wb_t->last == wb_t->num)
+				wb_t->last = 0;
+			wb_t->used--;
+		}
+
+		wb = &wb_t->entrys[wb_t->first];
+		i = (n < wb_t->nb) ? n : wb_t->nb;
+
+		wb->pa = pa;
+		//pa += i << WORD_SHT;
+		pa += i;
+
+		wb->nb = i;
+		//memcpy(wb->data, data, i << WORD_SHT);
+		memcpy (wb->data, data, i);
+		data += i;
+		n -= i;
+		wb_t->first++;
+		if (wb_t->first == wb_t->num)
+			wb_t->first = 0;
+		wb_t->used++;
+	};
+//teawater add for set_dirty fflash cache function 2005.07.18-------------------
+#ifdef DBCT
+	if (!skyeye_config.no_dbct) {
+		tb_setdirty (state, pa, NULL);
+	}
+#endif
+//AJ2D--------------------------------------------------------------------------
+}
+
+/* wb_drain_all
+ * @wb_t wb_t to drain
+ * */
+void
+mmu_wb_drain_all (ARMul_State * state, wb_s * wb_t)
+{
+	ARMword pa;
+	wb_entry_t *wb;
+	int i;
+
+	while (wb_t->used) {
+		wb = &wb_t->entrys[wb_t->last];
+		pa = wb->pa;
+		for (i = 0; i < wb->nb; i++) {
+			//mem_write_byte (state, pa, wb->data[i]);
+			bus_write(8, pa, wb->data[i]);
+			//pa += WORD_SIZE;
+			pa++;
+		}
+		wb_t->last++;
+		if (wb_t->last == wb_t->num)
+			wb_t->last = 0;
+		wb_t->used--;
+	};
+}
-- 
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