The SAMA5D2 has a second internal SRAM that can be reassigned as a L2 cache memory. Make sure it is configured as a L2 cache memory when booting from a SPL image.
Based on the commit b5ea95ef2b5b from the at91bootstrap repository.
Signed-off-by: Samuel Mescoff samuel.mescoff@mobile-devices.fr ---
Changes for v2: - removed useless #ifdef CONFIG_SAMA5D2
arch/arm/mach-at91/atmel_sfr.c | 7 +++++++ arch/arm/mach-at91/include/mach/at91_common.h | 1 + arch/arm/mach-at91/include/mach/sama5_sfr.h | 1 + arch/arm/mach-at91/spl_atmel.c | 4 ++++ 4 files changed, 13 insertions(+)
diff --git a/arch/arm/mach-at91/atmel_sfr.c b/arch/arm/mach-at91/atmel_sfr.c index 2bccb84..adf44c6 100644 --- a/arch/arm/mach-at91/atmel_sfr.c +++ b/arch/arm/mach-at91/atmel_sfr.c @@ -19,3 +19,10 @@ void redirect_int_from_saic_to_aic(void) writel((key32 | ATMEL_SFR_AICREDIR_NSAIC), &sfr->aicredir); } } + +void configure_2nd_sram_as_l2_cache(void) +{ + struct atmel_sfr *sfr = (struct atmel_sfr *)ATMEL_BASE_SFR; + + writel(1, &sfr->l2cc_hramc); +} diff --git a/arch/arm/mach-at91/include/mach/at91_common.h b/arch/arm/mach-at91/include/mach/at91_common.h index efcd74e..0742ffc 100644 --- a/arch/arm/mach-at91/include/mach/at91_common.h +++ b/arch/arm/mach-at91/include/mach/at91_common.h @@ -34,5 +34,6 @@ void at91_spl_board_init(void); void at91_disable_wdt(void); void matrix_init(void); void redirect_int_from_saic_to_aic(void); +void configure_2nd_sram_as_l2_cache(void);
#endif /* AT91_COMMON_H */ diff --git a/arch/arm/mach-at91/include/mach/sama5_sfr.h b/arch/arm/mach-at91/include/mach/sama5_sfr.h index 7b19a20..b040256 100644 --- a/arch/arm/mach-at91/include/mach/sama5_sfr.h +++ b/arch/arm/mach-at91/include/mach/sama5_sfr.h @@ -25,6 +25,7 @@ struct atmel_sfr { u32 sn0; /* 0x4c */ u32 sn1; /* 0x50 */ u32 aicredir; /* 0x54 */ + u32 l2cc_hramc; /* 0x58 */ };
/* Bit field in DDRCFG */ diff --git a/arch/arm/mach-at91/spl_atmel.c b/arch/arm/mach-at91/spl_atmel.c index b2fb51d..688289e 100644 --- a/arch/arm/mach-at91/spl_atmel.c +++ b/arch/arm/mach-at91/spl_atmel.c @@ -79,6 +79,10 @@ void board_init_f(ulong dummy) { switch_to_main_crystal_osc();
+#ifdef CONFIG_SAMA5D2 + configure_2nd_sram_as_l2_cache(); +#endif + /* disable watchdog */ at91_disable_wdt();