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mpc83xx: add support configure bus parking

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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>
This commit is contained in:
Heiko Schocher 2010-01-07 08:56:00 +01:00 committed by Kim Phillips
parent a0daa2e06f
commit a3f5da1bee
2 changed files with 20 additions and 0 deletions
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12
cpu/mpc83xx/cpu_init.c
View File

@ -69,6 +69,12 @@ void cpu_init_f (volatile immap_t * im)
#endif #endif
#ifdef CONFIG_SYS_ACR_RPTCNT /* Arbiter repeat count */ #ifdef CONFIG_SYS_ACR_RPTCNT /* Arbiter repeat count */
(ACR_RPTCNT << ACR_RPTCNT_SHIFT) | (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 #endif
0; 0;
__be32 acr_val = __be32 acr_val =
@ -77,6 +83,12 @@ void cpu_init_f (volatile immap_t * im)
#endif #endif
#ifdef CONFIG_SYS_ACR_RPTCNT /* Arbiter repeat count */ #ifdef CONFIG_SYS_ACR_RPTCNT /* Arbiter repeat count */
(CONFIG_SYS_ACR_RPTCNT << ACR_RPTCNT_SHIFT) | (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 #endif
0; 0;
__be32 spcr_mask = __be32 spcr_mask =

8
include/configs/kmeter1.h
View File

@ -71,6 +71,14 @@
*/ */
#define CONFIG_SYS_IMMR 0xE0000000 #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 * DDR Setup
*/ */