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 */