usbarmory-rt: add Cargo feature to move .text and .rodata to DDR RAM #47
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the default is to place all linker sections: instructions (`.text`), constants (`.rodata`), data (`.bss` / `.data`) and stack in On-Chip RAM (OCRAM, 128 KB) when this Cargo feature is enabled the instructions and the constants will be placed in DDR RAM, which has a capacity of 512 MB the use of DDR RAM is currently capped at 32 MB to avoid .text and .rodata being loaded into the staging area that u-boot uses to hold ELF files
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the default is to place all linker sections: instructions (
.text),constants (
.rodata), data (.bss/.data) and stack in On-Chip RAM (OCRAM,128 KB)
when this Cargo feature is enabled the instructions and the constants will be
placed in DDR RAM, which has a capacity of 512 MB
the use of DDR RAM is currently capped at 32 MB to avoid .text and .rodata being
loaded into the staging area that u-boot uses to hold ELF files
closes #45
note that this doesn't address #31