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arm64: mvebu: handle non-zero base address for RAM

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board_get_usable_ram_top() conflated the RAM size with the top address
of RAM. On systems where RAM starts at address 0 these numbers are the
same so it went unnoticed. Update board_get_usable_ram_top() to take
CONFIG_SYS_SDRAM_BASE into account when determining the top address.

Signed-off-by: Chris Packham <judge.packham@gmail.com>
Reviewed-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Chris Packham
2022-05-20 16:39:22 +12:00
committed by Stefan Roese
parent e33879a45e
commit 8fd3cf2940
1 changed files with 3 additions and 4 deletions
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7
arch/arm/mach-mvebu/arm64-common.c
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@@ -28,14 +28,13 @@ DECLARE_GLOBAL_DATA_PTR;
* Currently only 2GiB are mapped for system memory. This is what * Currently only 2GiB are mapped for system memory. This is what
* we pass to the U-Boot subsystem here. * we pass to the U-Boot subsystem here.
*/ */
#define USABLE_RAM_SIZE 0x80000000 #define USABLE_RAM_SIZE 0x80000000ULL
ulong board_get_usable_ram_top(ulong total_size) ulong board_get_usable_ram_top(ulong total_size)
{ {
if (gd->ram_size > USABLE_RAM_SIZE) unsigned long top = CONFIG_SYS_SDRAM_BASE + min(gd->ram_size, USABLE_RAM_SIZE);
return USABLE_RAM_SIZE;
return gd->ram_size; return (gd->ram_top > top) ? top : gd->ram_top;
} }
/* /*