To enable hypervisors utilizing the ARMv7 virtualization extension
on the Versatile Express board with the A15 core tile, we add the
required configuration variable.
Also we define the board specific smp_set_cpu_boot_addr() function to
set the start address for secondary cores in the VExpress specific
manner.
There is no need to provide a custom smp_waitloop() function here.
This also serves as an example for what to do when adding support for
new boards.
Signed-off-by: Andre Przywara <andre.przywara@xxxxxxxxxx>
---
board/armltd/vexpress/vexpress_common.c | 15 +++++++++++++++
include/configs/vexpress_ca15_tc2.h | 5 +++++
2 files changed, 20 insertions(+)
Changes:
v3..v4: add VExpress' smp_set_core_boot_addr() and smp_waitloop()
v4..v5: remove VExpress specific smp_waitloop() in favor of
the generic implementation
diff --git a/board/armltd/vexpress/vexpress_common.c b/board/armltd/vexpress/vexpress_common.c
index 4c7a7f4..56febd9 100644
--- a/board/armltd/vexpress/vexpress_common.c
+++ b/board/armltd/vexpress/vexpress_common.c
@@ -256,3 +256,18 @@ ulong get_tbclk(void)
{
return (ulong)CONFIG_SYS_HZ;
}
+
+#if defined(CONFIG_ARMV7_NONSEC) || defined(CONFIG_ARMV7_VIRT)
+/* Setting the address at which secondary cores start from.
+ * Versatile Express uses one address for all cores, so ignore corenr
+ */
+void smp_set_core_boot_addr(unsigned long addr, int corenr)
+{
+ /* The SYSFLAGS register on VExpress needs to be cleared first
+ * by writing to the next address, since any writes to the address
+ * at offset 0 will only be ORed in
+ */
+ writel(~0, CONFIG_SYSFLAGS_ADDR + 4);
+ writel(addr, CONFIG_SYSFLAGS_ADDR);
+}
+#endif
diff --git a/include/configs/vexpress_ca15_tc2.h b/include/configs/vexpress_ca15_tc2.h
index 89ce1c7..0806034 100644
--- a/include/configs/vexpress_ca15_tc2.h
+++ b/include/configs/vexpress_ca15_tc2.h
@@ -15,4 +15,9 @@
#include "vexpress_common.h"
#define CONFIG_BOOTP_VCI_STRING "U-boot.armv7.vexpress_ca15x2_tc2"
+#define CONFIG_SYSFLAGS_ADDR 0x1c010030
+#define CONFIG_SMP_PEN_ADDR CONFIG_SYSFLAGS_ADDR
+
+#define CONFIG_ARMV7_VIRT
+
#endif
--
1.7.12.1
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