From patchwork Wed Feb 26 14:03:57 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kyle Evans X-Patchwork-Id: 236887 List-Id: U-Boot discussion From: kevans at FreeBSD.org (kevans at FreeBSD.org) Date: Wed, 26 Feb 2020 08:03:57 -0600 Subject: [PATCH] raspberrypi: reserve first two pages in efi memory map Message-ID: <20200226140357.27649-1-kevans@FreeBSD.org> From: Kyle Evans The psci stub provided by Raspberry Pi is around 5k in size, thus residing in the first two pages of memory. Without this reservation, the next stage or OS assume they're free to use the second page and may get catastrophic results from clobbering it. Signed-off-by: Kyle Evans Cc: Matthias Brugger --- board/raspberrypi/rpi/rpi.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/board/raspberrypi/rpi/rpi.c b/board/raspberrypi/rpi/rpi.c index e367ba3092..d3f9bd16ac 100644 --- a/board/raspberrypi/rpi/rpi.c +++ b/board/raspberrypi/rpi/rpi.c @@ -488,8 +488,8 @@ int ft_board_setup(void *blob, bd_t *bd) lcd_dt_simplefb_add_node(blob); #ifdef CONFIG_EFI_LOADER - /* Reserve the spin table */ - efi_add_memory_map(0, 1, EFI_RESERVED_MEMORY_TYPE, 0); + /* Reserve the first two pages for spin table/psci stub. */ + efi_add_memory_map(0, 2, EFI_RESERVED_MEMORY_TYPE, 0); #endif return 0;