axs103: Support slave core kick-start on axs103 v1.1 firmware

[people/ms/u-boot.git] / board / synopsys / axs10x / axs10x.c

diff --git a/board/synopsys/axs10x/axs10x.c b/board/synopsys/axs10x/axs10x.c
index 57c790220f7103817c28857fc7d4457a101d2424..e6b69da3da7fb41c8a851d89f8ed6588bf5f5d90 100644 (file)
--- a/board/synopsys/axs10x/axs10x.c
+++ b/board/synopsys/axs10x/axs10x.c
@@ -7,6 +7,7 @@
 #include <common.h>
 #include <dwmmc.h>
 #include <malloc.h>
+#include <asm/arcregs.h>
 #include "axs10x.h"
 
 DECLARE_GLOBAL_DATA_PTR;
@@ -66,9 +67,27 @@ void smp_kick_all_cpus(void)
 #define BITS_START_MODE        4
 #define BITS_CORE_SEL  9
 
+/*
+ * In axs103 v1.1 START bits semantics has changed quite a bit.
+ * We used to have a generic START bit for all cores selected by CORE_SEL mask.
+ * But now we don't touch CORE_SEL at all because we have a dedicated START bit
+ * for each core:
+ *     bit 0: Core 0 (master)
+ *     bit 1: Core 1 (slave)
+ */
+#define BITS_START_CORE1       1
+
+#define ARCVER_HS38_3_0        0x53
+
+       int core_family = read_aux_reg(ARC_AUX_IDENTITY) & 0xff;
        int cmd = readl((void __iomem *)AXC003_CREG_CPU_START);
-       cmd |= (1 << BITS_CORE_SEL) | (1 << BITS_START);
-       cmd &= ~(1 << BITS_START_MODE);
+
+       if (core_family < ARCVER_HS38_3_0) {
+               cmd |= (1 << BITS_CORE_SEL) | (1 << BITS_START);
+               cmd &= ~(1 << BITS_START_MODE);
+       } else {
+               cmd |= (1 << BITS_START_CORE1);
+       }
        writel(cmd, (void __iomem *)AXC003_CREG_CPU_START);
 }
 #endif