The L2 cache controller needs some initialization before use. Same goes for the CAN SRAM, do so after the MMU setup.
Signed-off-by: Ahmad Fatoum <[email protected]> --- arch/arm/mach-at91/Makefile | 1 + arch/arm/mach-at91/sama5d2.c | 52 ++++++++++++++++++++++++++++++++++++ 2 files changed, 53 insertions(+) create mode 100644 arch/arm/mach-at91/sama5d2.c diff --git a/arch/arm/mach-at91/Makefile b/arch/arm/mach-at91/Makefile index 6aaef7c531da..7c8399ee76f2 100644 --- a/arch/arm/mach-at91/Makefile +++ b/arch/arm/mach-at91/Makefile @@ -26,6 +26,7 @@ obj-$(CONFIG_SOC_AT91SAM9263) += at91sam9263.o at91sam9263_devices.o obj-$(CONFIG_SOC_SAMA5D3) += sama5d3.o sama5d3_devices.o endif lwl-$(CONFIG_SOC_SAMA5D2) += sama5d2_ll.o +obj-$(CONFIG_SOC_SAMA5D2) += sama5d2.o obj-$(CONFIG_SOC_AT91SAM9G20) += at91sam9260.o at91sam9260_devices.o obj-$(CONFIG_SOC_AT91SAM9G45) += at91sam9g45.o at91sam9g45_devices.o obj-$(CONFIG_SOC_AT91SAM9X5) += at91sam9x5.o at91sam9x5_devices.o diff --git a/arch/arm/mach-at91/sama5d2.c b/arch/arm/mach-at91/sama5d2.c new file mode 100644 index 000000000000..2f74b0b38df1 --- /dev/null +++ b/arch/arm/mach-at91/sama5d2.c @@ -0,0 +1,52 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include <common.h> +#include <of.h> +#include <init.h> +#include <mach/sama5d2.h> +#include <asm/cache-l2x0.h> +#include <asm/mmu.h> + +#define SFR_CAN 0x48 +#define SFR_L2CC_HRAMC 0x58 + +static void sama5d2_can_ram_init(void) +{ + writel(0x00210021, SAMA5D2_BASE_SFR + SFR_CAN); +} + +static void sama5d2_l2x0_init(void) +{ + void __iomem *l2x0_base = SAMA5D2_BASE_L2CC; + u32 cfg; + + writel(0x1, SAMA5D2_BASE_SFR + SFR_L2CC_HRAMC); + + /* Prefetch Control */ + cfg = readl(l2x0_base + L2X0_PREFETCH_CTRL); + /* prefetch offset: TODO find proper values */ + cfg |= 0x1; + cfg |= L2X0_INCR_DOUBLE_LINEFILL_EN | L2X0_PREFETCH_DROP_EN + | L2X0_DOUBLE_LINEFILL_EN; + cfg |= L2X0_DATA_PREFETCH_EN | L2X0_INSTRUCTION_PREFETCH_EN; + writel(cfg, l2x0_base + L2X0_PREFETCH_CTRL); + + /* Power Control */ + cfg = readl(l2x0_base + L2X0_POWER_CTRL); + cfg |= L2X0_STNDBY_MODE_EN | L2X0_DYNAMIC_CLK_GATING_EN; + writel(cfg, l2x0_base + L2X0_POWER_CTRL); + + l2x0_init(l2x0_base, 0x0, ~0UL); +} + +static int sama5d2_init(void) +{ + if (!of_machine_is_compatible("atmel,sama5d2")) + return 0; + + sama5d2_can_ram_init(); + sama5d2_l2x0_init(); + + return 0; +} +postmmu_initcall(sama5d2_init); -- 2.27.0 _______________________________________________ barebox mailing list [email protected] http://lists.infradead.org/mailman/listinfo/barebox
