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| author | Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> | 2020-01-16 19:22:32 +0300 |
|---|---|---|
| committer | Alexey Brodkin <abrodkin@synopsys.com> | 2020-04-27 11:20:26 +0300 |
| commit | 4b4da7ff611efc18080133a72a320206652bae30 (patch) | |
| tree | 5789ee3592e6061f76f84760c6dbfef8d391fe3e /board/synopsys | |
| parent | 28db0d693f14b075facf4cc3e4a2d562e86f451d (diff) | |
| download | u-boot-4b4da7ff611efc18080133a72a320206652bae30.zip u-boot-4b4da7ff611efc18080133a72a320206652bae30.tar.gz u-boot-4b4da7ff611efc18080133a72a320206652bae30.tar.bz2 | |
ARC: HSDK-4xD: use active low polarity of cpu_start pulse
Add quirk for HSDK-4xD - due to HW issues HSDK can use any pulse
polarity but HSDK-4xD require active low polarity of cpu_start pulse.
So use low polarity of cpu_start pulse for both board.
Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Diffstat (limited to 'board/synopsys')
| -rw-r--r-- | board/synopsys/hsdk/hsdk.c | 26 |
1 files changed, 19 insertions, 7 deletions
diff --git a/board/synopsys/hsdk/hsdk.c b/board/synopsys/hsdk/hsdk.c index 771f7bb..577893d 100644 --- a/board/synopsys/hsdk/hsdk.c +++ b/board/synopsys/hsdk/hsdk.c @@ -40,6 +40,7 @@ DECLARE_GLOBAL_DATA_PTR; #define CREG_BASE (ARC_PERIPHERAL_BASE + 0x1000) #define CREG_CPU_START (CREG_BASE + 0x400) #define CREG_CPU_START_MASK 0xF +#define CREG_CPU_START_POL BIT(4) #define SDIO_BASE (ARC_PERIPHERAL_BASE + 0xA000) #define SDIO_UHS_REG_EXT (SDIO_BASE + 0x108) @@ -331,25 +332,36 @@ static inline void halt_this_cpu(void) __builtin_arc_flag(1); } -static void smp_kick_cpu_x(u32 cpu_id) +static u32 get_masked_cpu_ctart_reg(void) { int cmd = readl((void __iomem *)CREG_CPU_START); + /* + * Quirk for HSDK-4xD - due to HW issues HSDK can use any pulse polarity + * and HSDK-4xD require active low polarity of cpu_start pulse. + */ + cmd &= ~CREG_CPU_START_POL; + + cmd &= ~CREG_CPU_START_MASK; + + return cmd; +} + +static void smp_kick_cpu_x(u32 cpu_id) +{ + int cmd; + if (cpu_id > NR_CPUS) return; - cmd &= ~CREG_CPU_START_MASK; + cmd = get_masked_cpu_ctart_reg(); cmd |= (1 << cpu_id); writel(cmd, (void __iomem *)CREG_CPU_START); } static u32 prepare_cpu_ctart_reg(void) { - int cmd = readl((void __iomem *)CREG_CPU_START); - - cmd &= ~CREG_CPU_START_MASK; - - return cmd | env_common.core_mask.val; + return get_masked_cpu_ctart_reg() | env_common.core_mask.val; } /* slave CPU entry for configuration */ |