From a3f5da1bee9a8c343a411080d7d468bdc78794a4 Mon Sep 17 00:00:00 2001 From: Heiko Schocher <hs@denx.de> Date: Thu, 7 Jan 2010 08:56:00 +0100 Subject: [PATCH] mpc83xx: add support configure bus parking 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> Signed-off-by: Kim Phillips <kim.phillips@freescale.com> --- cpu/mpc83xx/cpu_init.c | 12 ++++++++++++ include/configs/kmeter1.h | 8 ++++++++ 2 files changed, 20 insertions(+) diff --git a/cpu/mpc83xx/cpu_init.c b/cpu/mpc83xx/cpu_init.c index 0d6a5fec97..75b45222bd 100644 --- a/cpu/mpc83xx/cpu_init.c +++ b/cpu/mpc83xx/cpu_init.c @@ -69,6 +69,12 @@ void cpu_init_f (volatile immap_t * im) #endif #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 = @@ -77,6 +83,12 @@ void cpu_init_f (volatile immap_t * im) #endif #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 = diff --git a/include/configs/kmeter1.h b/include/configs/kmeter1.h index bec08dab1f..b023326505 100644 --- a/include/configs/kmeter1.h +++ b/include/configs/kmeter1.h @@ -71,6 +71,14 @@ */ #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 */ -- 2.39.5