Juno R2: Configure the correct L2 RAM latency values
The default reset values for the L2 Data & Tag RAM latencies on the Cortex-A72 on Juno R2 are not suitable. This patch modifies the Juno platform reset handler to configure the right settings on Juno R2. Change-Id: I20953de7ba0619324a389e0b7bbf951b64057db8
This commit is contained in:
parent
23d39dbc7e
commit
1dbe31591a
|
@ -62,6 +62,7 @@
|
|||
#define L2CTLR_TAG_RAM_LATENCY_SHIFT 6
|
||||
|
||||
#define L2_DATA_RAM_LATENCY_3_CYCLES 0x2
|
||||
#define L2_TAG_RAM_LATENCY_2_CYCLES 0x1
|
||||
#define L2_TAG_RAM_LATENCY_3_CYCLES 0x2
|
||||
|
||||
#endif /* __CORTEX_A72_H__ */
|
||||
|
|
|
@ -33,6 +33,7 @@
|
|||
#include <bl_common.h>
|
||||
#include <cortex_a53.h>
|
||||
#include <cortex_a57.h>
|
||||
#include <cortex_a72.h>
|
||||
#include <v2m_def.h>
|
||||
#include "../juno_def.h"
|
||||
|
||||
|
@ -153,10 +154,31 @@ endfunc JUNO_HANDLER(1)
|
|||
* - Quad core Cortex-A53 processor cluster;
|
||||
* - Dual core Cortex-A72 processor cluster.
|
||||
*
|
||||
* This handler does nothing.
|
||||
* This handler does the following:
|
||||
* - Set the L2 Data RAM latency to 2 (i.e. 3 cycles) for Cortex-A72
|
||||
* - Set the L2 Tag RAM latency to 1 (i.e. 2 cycles) for Cortex-A72
|
||||
*
|
||||
* Note that:
|
||||
* - Defect #831273 doesn't affect Juno R2.
|
||||
* --------------------------------------------------------------------
|
||||
*/
|
||||
func JUNO_HANDLER(2)
|
||||
/* --------------------------------------------------------------------
|
||||
* Nothing to do on Cortex-A53.
|
||||
* --------------------------------------------------------------------
|
||||
*/
|
||||
jump_if_cpu_midr CORTEX_A72_MIDR, A72
|
||||
ret
|
||||
|
||||
A72:
|
||||
/* --------------------------------------------------------------------
|
||||
* Cortex-A72 specific settings
|
||||
* --------------------------------------------------------------------
|
||||
*/
|
||||
mov x0, #((L2_DATA_RAM_LATENCY_3_CYCLES << L2CTLR_DATA_RAM_LATENCY_SHIFT) | \
|
||||
(L2_TAG_RAM_LATENCY_2_CYCLES << L2CTLR_TAG_RAM_LATENCY_SHIFT))
|
||||
msr L2CTLR_EL1, x0
|
||||
isb
|
||||
ret
|
||||
endfunc JUNO_HANDLER(2)
|
||||
|
||||
|
|
Loading…
Reference in New Issue