[U-Boot] 83xx: add support configure bus parking

[Heiko Schocher]

Add support to configure bus parking mode and master in bus arbitration
configuration (ACR). Add this for the kmeter1 port:

Configure bus arbiter with recommended values from Freescale
to improve bus latency/throughput for application with
intensive QuiccEngine activity.

Signed-off-by: Heiko Schocher <hs at denx.de>
---
 cpu/mpc83xx/cpu_init.c    |   12 ++++++++++++
 include/configs/kmeter1.h |    8 ++++++++
 2 files changed, 20 insertions(+), 0 deletions(-)

diff --git a/cpu/mpc83xx/cpu_init.c b/cpu/mpc83xx/cpu_init.c
index 0d6a5fe..75b4522 100644
--- a/cpu/mpc83xx/cpu_init.c
+++ b/cpu/mpc83xx/cpu_init.c
@@ -70,6 +70,12 @@ void cpu_init_f (volatile immap_t * im)
 #ifdef CONFIG_SYS_ACR_RPTCNT /* Arbiter repeat count */
 		(ACR_RPTCNT << ACR_RPTCNT_SHIFT) |
 #endif
+#ifdef CONFIG_SYS_ACR_APARK	/* Arbiter address parking mode */
+		(ACR_APARK << ACR_APARK_SHIFT) |
+#endif
+#ifdef CONFIG_SYS_ACR_PARKM	/* Arbiter parking master */
+		(ACR_PARKM << ACR_PARKM_SHIFT) |
+#endif
 		0;
 	__be32 acr_val =
 #ifdef CONFIG_SYS_ACR_PIPE_DEP /* Arbiter pipeline depth */
@@ -78,6 +84,12 @@ void cpu_init_f (volatile immap_t * im)
 #ifdef CONFIG_SYS_ACR_RPTCNT /* Arbiter repeat count */
 		(CONFIG_SYS_ACR_RPTCNT << ACR_RPTCNT_SHIFT) |
 #endif
+#ifdef CONFIG_SYS_ACR_APARK	/* Arbiter address parking mode */
+		(CONFIG_SYS_ACR_APARK << ACR_APARK_SHIFT) |
+#endif
+#ifdef CONFIG_SYS_ACR_PARKM	/* Arbiter parking master */
+		(CONFIG_SYS_ACR_PARKM << ACR_PARKM_SHIFT) |
+#endif
 		0;
 	__be32 spcr_mask =
 #ifdef CONFIG_SYS_SPCR_OPT /* Optimize transactions between CSB and other dev */
diff --git a/include/configs/kmeter1.h b/include/configs/kmeter1.h
index 9a48955..71658d8 100644
--- a/include/configs/kmeter1.h
+++ b/include/configs/kmeter1.h
@@ -77,6 +77,14 @@
 #define CONFIG_SYS_IMMR		0xE0000000

 /*
+ * Bus Arbitration Configuration Register (ACR)
+ */
+#define CONFIG_SYS_ACR_PIPE_DEP 3       /* pipeline depth 4 transactions */
+#define CONFIG_SYS_ACR_RPTCNT   3       /* 4 consecutive transactions */
+#define CONFIG_SYS_ACR_APARK    0       /* park bus to master (below) */
+#define CONFIG_SYS_ACR_PARKM    3       /* parking master = QuiccEngine */
+
+/*
  * DDR Setup
  */
 #define CONFIG_SYS_DDR_BASE		0x00000000 /* DDR is system memory */
-- 
1.6.2.5

-- 
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HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany