[U-Boot] [PATCH] ARM: tegra: Reserve 32MB for the Linux kernel

[Stephen Warren]

On 2/12/19 9:03 AM, Jon Hunter wrote:
> From: Jonathan Hunter <jonathanh at nvidia.com>
> 
> Booting recently Linux -next kernels on 32-bit Tegra devices has been
> failing when using the 'multi_v7_defconfig' kenrel configuration because
> the size of has grown such that it is overwriting the FDT blob.
> 
> Current Linux -next kernels built with the 'multi_v7_defconfig' have a
> total size of ~19.5MB (where .text is ~12.5MB, .data is ~6.5MB and .bss
> is ~0.5MB). Therefore, increase the memory location reserved for the
> Linux kernel to 32MB from 16MB for 32-bit Tegra devices.
> 
> This change has been boot tested on Tegra20 Ventana, Tegra30 Cardhu and
> Tegra124 Jetson TK1 with the Linux next tree (20190212).

Reviewed-by: Stephen Warren <swarren at nvidia.com>

Just in case anyone else puzzles over this:

It took me too long to realize/remember why the following wasn't a 
problem since the stack will overlap the initrd location:

-#define CONFIG_STACKBASE	0x82800000	/* 40MB */
+#define CONFIG_STACKBASE	0x83800000	/* 56MB */
...
+	"ramdisk_addr_r=0x83100000\0"

... which of course is because the stackbase variable is only used 
during early boot, which is long before that location is used to store 
the initrd the U-Boot loads.