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zynq7000-rs/scripts/memory_ocm.x
Robin Mueller 5d0f2837d1
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Introduce Rust FSBL
This PR introduces some major features while also changing the project structure to be more flexible
for multiple platforms (e.g. host tooling). It also includes a lot of
bugfixes, renamings for consistency purposes and dependency updates.

Added features:

1. Pure Rust FSBL for the Zedboard. This first variant is simplistic. It
   is currently only capable of QSPI boot. It searches for a bitstream
   and ELF file inside the boot binary, flashes them and jumps to them.
2. QSPI flasher for the Zedboard.
3. DDR, QSPI, DEVC, private CPU timer and PLL configuration modules
3. Tooling to auto-generate board specific DDR and DDRIOB config
   parameters from the vendor provided ps7init.tcl file

Changed project structure:

1. All target specific project are inside a dedicated workspace inside
   the `zynq` folder now.
2. All tool intended to be run on a host are inside a `tools` workspace
3. All other common projects are at the project root

Major bugfixes:

1. SPI module: CPOL was not configured properly
2. Logger flush implementation was empty, implemented properly now.
2025-10-08 20:21:04 +02:00

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MEMORY
{
/* The Zynq7000 has 192 kB of OCM memory which can be used for the FSBL */
CODE(rx) : ORIGIN = 0x00000000, LENGTH = 192K
OCM_UPPER(rx): ORIGIN = 0xFFFF0000, LENGTH = 64K
/* Leave 1 MB of memory which will be configured as uncached device memory by the MMU. This can
be used for something like DMA descriptors, but the DDR needs to be set up first in addition
to configuring the page at address 0x400_0000 accordingly */
UNCACHED(rx): ORIGIN = 0x4000000, LENGTH = 1M
}
REGION_ALIAS("DATA", CODE);
SECTIONS
{
/* Uncached memory */
.uncached (NOLOAD) : ALIGN(4) {
. = ALIGN(4);
_sbss_uncached = .;
*(.uncached .uncached.*);
. = ALIGN(4);
_ebss_uncached = .;
} > UNCACHED
}