From 8c36e99f211104fd7dcbf0669a35a47ce5e154f5 Mon Sep 17 00:00:00 2001 From: Oded Gabbay Date: Wed, 28 Dec 2016 13:38:35 +0200 Subject: [PATCH] armv8: release slave cores from CPU_RELEASE_ADDR When using ARMv8 with ARMV8_SPIN_TABLE=y, we want the slave cores to wait on spin_table_cpu_release_addr, until the Linux kernel will "wake" them by writing to that location. The address of spin_table_cpu_release_addr is transferred to the kernel using the device tree that is updated by spin_table_update_dt(). However, if we also use SPL, then the slave cores are stuck at CPU_RELEASE_ADDR instead and as a result, never wake up. This patch releases the slave cores by writing spl_image->entry_point to CPU_RELEASE_ADDR location before the end of the SPL code (at jump_to_image_no_args()). That way, the slave cores will start to execute the u-boot and will get to the spin-table code and wait on the correct address (spin_table_cpu_release_addr). Signed-off-by: Oded Gabbay Cc: Simon Glass Reviewed-by: Simon Glass --- common/spl/spl.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/common/spl/spl.c b/common/spl/spl.c index d3a4ff62e5..8fb8da4525 100644 --- a/common/spl/spl.c +++ b/common/spl/spl.c @@ -167,6 +167,14 @@ __weak void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image) (image_entry_noargs_t)spl_image->entry_point; debug("image entry point: 0x%lX\n", spl_image->entry_point); +#if defined(CONFIG_ARMV8_SPIN_TABLE) && defined(CONFIG_ARMV8_MULTIENTRY) + /* + * Release all slave cores from CPU_RELEASE_ADDR so they could + * arrive to the spin-table code in start.S of the u-boot + */ + *(ulong *)CPU_RELEASE_ADDR = (ulong)spl_image->entry_point; +#endif + image_entry(); } -- 2.39.5