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ARM: tegra: avoid using secure carveout RAM

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If a secure carveout exists, U-Boot cannot use that memory. Fix
carveout_size() to reflect this, and hence transitively fix
usable_ram_size_below_4g() and board_get_usable_ram_top(). This change
ensures that when U-Boot copies the secure monitor code to install it, the
copy target is not in-use for U-Boot code/data.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
This commit is contained in:
Stephen Warren 2018-06-22 13:03:19 -06:00 • committed by Tom Warren
parent 74c69cdcc0
commit 6e584e633d
1 changed files with 4 additions and 0 deletions
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4
arch/arm/mach-tegra/board2.c
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@ -249,6 +249,10 @@ static ulong carveout_size(void)
{ {
#ifdef CONFIG_ARM64 #ifdef CONFIG_ARM64
return SZ_512M; return SZ_512M;
#elif defined(CONFIG_ARMV7_SECURE_RESERVE_SIZE)
// BASE+SIZE might not == 4GB. If so, we want the carveout to cover
// from BASE to 4GB, not BASE to BASE+SIZE.
return (0 - CONFIG_ARMV7_SECURE_BASE);
#else #else
return 0; return 0;
#endif #endif