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ARM: socfpga: Assure correct ACTLR configuration

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Make sure the ARM ACTLR register has correct configuration, otherwise
the Linux kernel refuses to boot. In particular, the "Write Full Line
of Zeroes" bit must be cleared.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Chin Liang See <chin.liang.see@intel.com>
Cc: Dinh Nguyen <dinguyen@kernel.org>
This commit is contained in:
Marek Vasut 2018-05-29 16:16:46 +02:00
parent df78f016e8
commit 887a8b6ec2
1 changed files with 12 additions and 1 deletions
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13
arch/arm/mach-socfpga/board.c
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@ -18,7 +18,18 @@
DECLARE_GLOBAL_DATA_PTR; DECLARE_GLOBAL_DATA_PTR;
void s_init(void) {} void s_init(void) {
/*
* Preconfigure ACTLR, make sure Write Full Line of Zeroes is disabled.
* This is optional on CycloneV / ArriaV.
* This is mandatory on Arria10, otherwise Linux refuses to boot.
*/
asm volatile(
"mcr p15, 0, %0, c1, c0, 1\n"
"isb\n"
"dsb\n"
::"r"(0x0));
}
/* /*
* Miscellaneous platform dependent initialisations * Miscellaneous platform dependent initialisations