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Diffstat (limited to 'arch/arm/mach-at91/aic.c')
-rw-r--r-- | arch/arm/mach-at91/aic.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/arch/arm/mach-at91/aic.c b/arch/arm/mach-at91/aic.c new file mode 100644 index 0000000000..b57fe57361 --- /dev/null +++ b/arch/arm/mach-at91/aic.c @@ -0,0 +1,28 @@ +// SPDX-License-Identifier: BSD-1-Clause +/* + * Copyright (c) 2015, Atmel Corporation + * + * Atmel's name may not be used to endorse or promote products derived from + * this software without specific prior written permission. + */ + +#include <mach/at91/aic.h> +#include <io.h> + +#define SFR_AICREDIR 0x54 +#define SFR_SN1 0x50 /* Serial Number 1 Register */ + +void at91_aic_redir(void __iomem *sfr, u32 key) +{ + u32 key32; + + if (readl(sfr + SFR_AICREDIR) & 0x01) + return; + + key32 = readl(sfr + SFR_SN1) ^ key; + writel(key32 | 0x01, sfr + SFR_AICREDIR); + /* bits[31:1] = key */ + /* bit[0] = 1 => all interrupts redirected to AIC */ + /* bit[0] = 0 => secure interrupts directed to SAIC, + others to AIC (default) */ +} |