From: Kyle Evans kevans@FreeBSD.org
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 kevans@FreeBSD.org Cc: Matthias Brugger mbrugger@suse.com --- 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;