arc: implement slave cores kick-start for Linux kernel

[people/ms/u-boot.git] / board / synopsys / axs101 / axs101.c

diff --git a/board/synopsys/axs101/axs101.c b/board/synopsys/axs101/axs101.c
index 8c16410944d4714f6ffdfb8dc5b1e2eca3c5c026..d4280f743ad0b46e4da1bf16e54930c4cceb9f89 100644 (file)
--- a/board/synopsys/axs101/axs101.c
+++ b/board/synopsys/axs101/axs101.c
@@ -56,3 +56,33 @@ int board_early_init_f(void)
 
        return 0;
 }
+
+#ifdef CONFIG_ISA_ARCV2
+#define RESET_VECTOR_ADDR      0x0
+
+void smp_set_core_boot_addr(unsigned long addr, int corenr)
+{
+       /* All cores have reset vector pointing to 0 */
+       writel(addr, (void __iomem *)RESET_VECTOR_ADDR);
+
+       /* Make sure other cores see written value in memory */
+       flush_dcache_range(RESET_VECTOR_ADDR, RESET_VECTOR_ADDR + sizeof(int));
+}
+
+void smp_kick_all_cpus(void)
+{
+/* CPU start CREG */
+#define AXC003_CREG_CPU_START  0xF0001400
+
+/* Bits positions in CPU start CREG */
+#define BITS_START     0
+#define BITS_POLARITY  8
+#define BITS_CORE_SEL  9
+#define BITS_MULTICORE 12
+
+#define CMD    (1 << BITS_MULTICORE) | (1 << BITS_CORE_SEL) | \
+               (1 << BITS_POLARITY) | (1 << BITS_START)
+
+       writel(CMD, (void __iomem *)AXC003_CREG_CPU_START);
+}
+#endif