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ARC: HSDK-4xD: use active low polarity of cpu_start pulse

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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>
This commit is contained in:
Eugeniy Paltsev 2020-01-16 19:22:32 +03:00 committed by Alexey Brodkin
parent 28db0d693f
commit 4b4da7ff61
1 changed files with 19 additions and 7 deletions
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26
board/synopsys/hsdk/hsdk.c
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@ -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 */