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83xx: add support configure bus parking

U-Boot Heiko Schocher 2 participants 2 messages Jan 7, 2010 – Jan 8, 2010

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Heiko Schocher

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#0 lore raw

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 <[email protected]>
---
 cpu/mpc83xx/cpu_init.c    |   12 ++++++++++++
 include/configs/kmeter1.h |    8 ++++++++
 2 files changed, 20 insertions(+), 0 deletions(-)
cpu/mpc83xx/cpu_init.c +12 -0
index 0d6a5fe..75b4522 100644
@@ -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 */
include/configs/kmeter1.h +8 -0
index 9a48955..71658d8 100644
@@ -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 */
Signature · 5 lines
1.6.2.5

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DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
#1 lore raw
Quoted 9 lines · On Thu, 7 Jan 2010 08:56:00 +0100 Heiko Schocher <[email protected]> wrote:

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 <[email protected]>

---

perfect - applied.

Thank you,

Kim