circuitpython/ports/samd/boards/samd51j19a.ld
robert-hh 949a808076 samd/boards: Add ADAFRUIT_FEATHER_M4_EXPRESS and _ITSYBITSY_M0_EXPRESS.
These two boards are used for testing, so it is favorable to have them
added early.

The full test set is:
- ADAFRUIT_FEATHER_M4_EXPRESS: SAMD51 with 32kHz crystal.
- ADAFRUIT_ITSYBITSY_M0_EXPRESS: SAMD21 without crystal.
- ADAFRUIT_ITSYBITSY_M4_EXPRESS: SAMD51 without crystal.
- SEEED_XIAO: SAM21 with 32kHz crystal.
2022-10-06 22:32:01 +11:00

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/*
GNU linker script for SAMD51
*/
/* Specify the memory areas */
MEMORY
{
FLASH (rx) : ORIGIN = 0x00004000, LENGTH = 512K - 16K
RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 192K
}
/* Top end of the stack, with room for double-tap variable */
_estack = ORIGIN(RAM) + LENGTH(RAM) - 8;
_sstack = _estack - 16K;
_sheap = _ebss;
_eheap = _sstack;