Added back some TCP/IP stack port layer files.

[freertos] / FreeRTOS-Plus / Source / FreeRTOS-Plus-TCP / portable / NetworkInterface / Zynq / uncached_memory.c

diff --git a/FreeRTOS-Plus/Source/FreeRTOS-Plus-TCP/portable/NetworkInterface/Zynq/uncached_memory.c b/FreeRTOS-Plus/Source/FreeRTOS-Plus-TCP/portable/NetworkInterface/Zynq/uncached_memory.c
new file mode 100644 (file)
index 0000000..b43e50e
--- /dev/null
+++ b/FreeRTOS-Plus/Source/FreeRTOS-Plus-TCP/portable/NetworkInterface/Zynq/uncached_memory.c
@@ -0,0 +1,132 @@
+/*\r
+ * uncached_memory.c\r
+ *\r
+ * This module will declare 1 MB of memory and switch off the caching for it.\r
+ *\r
+ * pucGetUncachedMemory( ulSize ) returns a trunc of this memory with a length\r
+ * rounded up to a multiple of 4 KB\r
+ *\r
+ * ucIsCachedMemory( pucBuffer ) returns non-zero if a given pointer is NOT\r
+ * within the range of the 1 MB non-cached memory.\r
+ *\r
+ */\r
+\r
+/*\r
+ * After "_end", 1 MB of uncached memory will be allocated for DMA transfers.\r
+ * Both the DMA descriptors as well as all EMAC TX-buffers will be allocated in\r
+ * uncached memory.\r
+ */\r
+\r
+/* Standard includes. */\r
+#include <stdint.h>\r
+#include <stdio.h>\r
+#include <stdlib.h>\r
+\r
+/* FreeRTOS includes. */\r
+#include "FreeRTOS.h"\r
+#include "task.h"\r
+#include "queue.h"\r
+\r
+/* FreeRTOS+TCP includes. */\r
+#include "FreeRTOS_IP.h"\r
+#include "FreeRTOS_Sockets.h"\r
+#include "FreeRTOS_IP_Private.h"\r
+\r
+#include "Zynq/x_emacpsif.h"\r
+#include "Zynq/x_topology.h"\r
+#include "xstatus.h"\r
+\r
+#include "xparameters.h"\r
+#include "xparameters_ps.h"\r
+#include "xil_exception.h"\r
+#include "xil_mmu.h"\r
+\r
+#include "uncached_memory.h"\r
+\r
+#define UNCACHED_MEMORY_SIZE   0x100000ul\r
+\r
+#define DDR_MEMORY_END (XPAR_PS7_DDR_0_S_AXI_HIGHADDR+1)\r
+\r
+static void vInitialiseUncachedMemory( void );\r
+\r
+static uint8_t *pucHeadOfMemory;\r
+static uint32_t ulMemorySize;\r
+static uint8_t *pucStartOfMemory = NULL;\r
+\r
+uint8_t ucIsCachedMemory( const uint8_t *pucBuffer )\r
+{\r
+uint8_t ucReturn;\r
+\r
+       if( ( pucStartOfMemory != NULL ) &&\r
+               ( pucBuffer >= pucStartOfMemory ) &&\r
+               ( pucBuffer < ( pucStartOfMemory + UNCACHED_MEMORY_SIZE ) ) )\r
+       {\r
+               ucReturn = pdFALSE;\r
+       }\r
+       else\r
+       {\r
+               ucReturn = pdTRUE;\r
+       }\r
+\r
+       return ucReturn;\r
+}\r
+\r
+uint8_t *pucGetUncachedMemory( uint32_t ulSize )\r
+{\r
+uint8_t *pucReturn;\r
+\r
+       if( pucStartOfMemory == NULL )\r
+       {\r
+               vInitialiseUncachedMemory( );\r
+       }\r
+       if( ( pucStartOfMemory == NULL ) || ( ulSize > ulMemorySize ) )\r
+       {\r
+               pucReturn = NULL;\r
+       }\r
+       else\r
+       {\r
+       uint32_t ulSkipSize;\r
+\r
+               pucReturn = pucHeadOfMemory;\r
+               ulSkipSize = ( ulSize + 0x1000ul ) & ~0xffful;\r
+               pucHeadOfMemory += ulSkipSize;\r
+               ulMemorySize -= ulSkipSize;\r
+       }\r
+\r
+       return pucReturn;\r
+}\r
+\r
+extern u8 _end;\r
+\r
+static void vInitialiseUncachedMemory( )\r
+{\r
+       /* At the end of program's space... */\r
+       pucStartOfMemory = (uint8_t *) &_end;\r
+       /*\r
+        * Align the start address to 1 MB boundary.\r
+        */\r
+       pucStartOfMemory = (uint8_t *)( ( ( uint32_t )pucStartOfMemory + UNCACHED_MEMORY_SIZE ) & ( ~( UNCACHED_MEMORY_SIZE - 1 ) ) );\r
+\r
+       if( ( ( u32 )pucStartOfMemory ) + UNCACHED_MEMORY_SIZE > DDR_MEMORY_END )\r
+       {\r
+//             vLoggingPrintf("vInitialiseUncachedMemory: Can not allocate uncached memory\n" );\r
+       }\r
+       else\r
+       {\r
+               /*\r
+                * Some objects want to be stored in uncached memory. Hence the 1 MB\r
+                * address range that starts after "_end" is made uncached\r
+                * by setting appropriate attributes in the translation table.\r
+                */\r
+               /* FIXME claudio rossi. Modified to prevent data abort exception (misaligned access)\r
+                * when application is compiled with -O1 or more optimization flag.\r
+                */\r
+/*             Xil_SetTlbAttributes( ( uint32_t )pucStartOfMemory, 0xc02 ); // addr, attr */\r
+               Xil_SetTlbAttributes( ( uint32_t )pucStartOfMemory, 0x1c02 ); // addr, attr\r
+\r
+               /* For experiments in the SDIO driver, make the remaining uncached memory public */\r
+               pucHeadOfMemory = pucStartOfMemory;\r
+               ulMemorySize = UNCACHED_MEMORY_SIZE;\r
+               memset( pucStartOfMemory, '\0', UNCACHED_MEMORY_SIZE );\r
+       }\r
+}\r