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armv8: cache_v8: Fix pgtables setup when MMU is already enabled

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When MMU is already enabled then dcache_enable() does not call mmu_setup()
and so setup_all_pgtables() is also never called.

In this situation when some driver calls mmu_set_region_dcache_behaviour()
function then U-Boot crashes with error message:

    Emergency page table not setup.

Fix this issue by explicitly calling setup_all_pgtables() in dcache_enable()
function near condition for mmu_setup().

This change fixes chainloading U-Boot from U-Boot on Turris Mox board which
uses mvneta ethernet driver which calls mmu_set_region_dcache_behaviour().

Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Marek Behún <kabel@kernel.org>
Reviewed-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Pali Rohár 2022-09-14 13:37:46 +02:00 committed by Tom Rini
parent 3c29c0fce0
commit ae17910117
1 changed files with 4 additions and 0 deletions
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4
arch/arm/cpu/armv8/cache_v8.c
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@ -503,6 +503,10 @@ void dcache_enable(void)
mmu_setup();
}
/* Set up page tables only once (it is done also by mmu_setup()) */
if (!gd->arch.tlb_fillptr)
setup_all_pgtables();
set_sctlr(get_sctlr() | CR_C);
}