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authorAmaury Pouly <amaury.pouly@gmail.com>2016-08-04 17:06:11 +0100
committerAmaury Pouly <amaury.pouly@gmail.com>2017-01-24 15:25:14 +0100
commit8fabbb008c1a31c809a3d97f22351f141a2bd02d (patch)
tree6e16386a7348197920a5ce1d99f623d0e10b6c3c /utils/hwstub/include/hwstub_protocol.h
parentd91d9f6851bba401650912c5cabcfe4c5f1150df (diff)
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hwstub: add support for coprocessor operations
At the moment the stub only implement them for MIPS. Change-Id: Ica835a0e9c70fa5675c3d655eae986e812a47de8
Diffstat (limited to 'utils/hwstub/include/hwstub_protocol.h')
-rw-r--r--utils/hwstub/include/hwstub_protocol.h32
1 files changed, 31 insertions, 1 deletions
diff --git a/utils/hwstub/include/hwstub_protocol.h b/utils/hwstub/include/hwstub_protocol.h
index f767e50571..ed26ee78e4 100644
--- a/utils/hwstub/include/hwstub_protocol.h
+++ b/utils/hwstub/include/hwstub_protocol.h
@@ -33,7 +33,7 @@
*/
#define HWSTUB_VERSION_MAJOR 4
-#define HWSTUB_VERSION_MINOR 2
+#define HWSTUB_VERSION_MINOR 3
#define HWSTUB_VERSION__(maj, min) #maj"."#min
#define HWSTUB_VERSION_(maj, min) HWSTUB_VERSION__(maj, min)
@@ -169,6 +169,7 @@ struct hwstub_net_hdr_t
#define HWSTUB_EXEC 0x44
#define HWSTUB_READ2_ATOMIC 0x45
#define HWSTUB_WRITE_ATOMIC 0x46
+#define HWSTUB_COPROCESSOR_OP 0x47
/* the following commands and the ACK/NACK mechanism are net only */
#define HWSERVER_ACK(n) (0x100|(n))
@@ -252,6 +253,35 @@ struct hwstub_exec_req_t
} __attribute__((packed));
/**
+ * HWSTUB_COPROCESSOR_OP
+ * Execute a coprocessor operation. The operation is describe in the header of
+ * the structure. There are currently two supported operations:
+ * - read: following the HWSTUB_COPROCESSOR_OP, the host can retrieve the data
+ * by sending a HWSTUB_READ2 request (just like a regular read) of
+ * the appropriate size
+ * - write: the header is followed by the data to write.
+ * If the request has two parts (second being READ2) then both requests must use
+ * the same ID in wValue, otherwise the second request will be STALLed.
+ * If a particular operation is not supported, it must be STALLed by the device.
+ */
+
+#define HWSTUB_COP_READ 0 /* read operation */
+#define HWSTUB_COP_WRITE 1 /* write operation */
+/* for MIPS */
+#define HWSTUB_COP_MIPS_COP 0 /* coprocessor number */
+#define HWSTUB_COP_MIPS_REG 1 /* coprocessor register */
+#define HWSTUB_COP_MIPS_SEL 2 /* coprocessor select */
+
+#define HWSTUB_COP_ARGS 7 /* maximum number of arguments */
+
+struct hwstub_cop_req_t
+{
+ uint8_t bOp; /* operation to execute */
+ uint8_t bArgs[HWSTUB_COP_ARGS]; /* arguments to the operation */
+ /* followed by data for WRITE operation */
+};
+
+/**
* HWSERVER_HELLO:
* Say hello to the server, give protocol version and get server version.
* Send: args[0] = major << 8 | minor, no data