powerpc/hvsi: Move HVSI protocol definitions to a header file

This moves various HVSI protocol definitions from the hvsi.c
driver to a header file that can be used later on by a udbg
implementation

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 68 insertions, 0 deletions

diff --git a/arch/powerpc/include/asm/hvsi.h b/arch/powerpc/include/asm/hvsi.h
new file mode 100644
index 000000000000..f13125a0cb3a
--- /dev/null
+++ b/arch/powerpc/include/asm/hvsi.h
@@ -0,0 +1,68 @@
+#ifndef _HVSI_H
+#define _HVSI_H
+
+#define VS_DATA_PACKET_HEADER           0xff
+#define VS_CONTROL_PACKET_HEADER        0xfe
+#define VS_QUERY_PACKET_HEADER          0xfd
+#define VS_QUERY_RESPONSE_PACKET_HEADER 0xfc
+
+/* control verbs */
+#define VSV_SET_MODEM_CTL    1 /* to service processor only */
+#define VSV_MODEM_CTL_UPDATE 2 /* from service processor only */
+#define VSV_CLOSE_PROTOCOL   3
+
+/* query verbs */
+#define VSV_SEND_VERSION_NUMBER 1
+#define VSV_SEND_MODEM_CTL_STATUS 2
+
+/* yes, these masks are not consecutive. */
+#define HVSI_TSDTR 0x01
+#define HVSI_TSCD  0x20
+
+#define HVSI_MAX_OUTGOING_DATA 12
+#define HVSI_VERSION 1
+
+struct hvsi_header {
+	uint8_t  type;
+	uint8_t  len;
+	uint16_t seqno;
+} __attribute__((packed));
+
+struct hvsi_data {
+	uint8_t  type;
+	uint8_t  len;
+	uint16_t seqno;
+	uint8_t  data[HVSI_MAX_OUTGOING_DATA];
+} __attribute__((packed));
+
+struct hvsi_control {
+	uint8_t  type;
+	uint8_t  len;
+	uint16_t seqno;
+	uint16_t verb;
+	/* optional depending on verb: */
+	uint32_t word;
+	uint32_t mask;
+} __attribute__((packed));
+
+struct hvsi_query {
+	uint8_t  type;
+	uint8_t  len;
+	uint16_t seqno;
+	uint16_t verb;
+} __attribute__((packed));
+
+struct hvsi_query_response {
+	uint8_t  type;
+	uint8_t  len;
+	uint16_t seqno;
+	uint16_t verb;
+	uint16_t query_seqno;
+	union {
+		uint8_t  version;
+		uint32_t mctrl_word;
+	} u;
+} __attribute__((packed));
+
+
+#endif /* _HVSI_H */