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

Heiko Schocher
2010-01-07T07:56:00Z

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@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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