Add retained-RAM staging for nRF52 mOTA
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mikecarper committed
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@@ -0,0 +1,80 @@
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/* S140 v6 application layout with a reset-retained 64 KiB mOTA arena. */
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SEARCH_DIR(.)
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GROUP(-lgcc -lc -lnosys)
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MEMORY
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{
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FLASH (rx) : ORIGIN = 0x26000, LENGTH = 0xED000 - 0x26000
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/* 8-byte retained clock state followed by the 72-byte MOTAHYB1 record. */
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PERSISTENT_RAM (rwx) : ORIGIN = 0x20006000, LENGTH = 80
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/* Normal application data, heap, and stack end below the mOTA arena. */
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RAM (rwx) : ORIGIN = 0x20006000 + 80, LENGTH = 0x20030000 - 0x20006000 - 80
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/* Fixed staging arena retained across the software-reset bootloader handoff. */
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MOTA_RAM (rwx) : ORIGIN = 0x20030000, LENGTH = 0x10000
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}
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SECTIONS
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{
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. = ALIGN(4);
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.persistent (NOLOAD) :
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{
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KEEP(*(.persistent_magic))
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KEEP(*(.persistent_data))
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. = ALIGN(4);
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} > PERSISTENT_RAM
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/* Export the direct-access handoff ABI even though no input section owns it. */
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__mota_hybrid_handoff_start__ = ADDR(.persistent) + SIZEOF(.persistent);
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__mota_hybrid_handoff_end__ = ORIGIN(PERSISTENT_RAM) + LENGTH(PERSISTENT_RAM);
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ASSERT(ADDR(.persistent) == 0x20006000,
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"mOTA retained clock prefix start must remain fixed")
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ASSERT(SIZEOF(.persistent) == 8,
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"mOTA hybrid retained clock prefix must remain exactly 8 bytes")
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ASSERT(__mota_hybrid_handoff_start__ == 0x20006008,
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"mOTA hybrid handoff start must remain fixed")
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ASSERT(__mota_hybrid_handoff_end__ == 0x20006050,
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"mOTA hybrid handoff end must remain fixed")
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ASSERT(__mota_hybrid_handoff_end__ - __mota_hybrid_handoff_start__ == 72,
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"mOTA hybrid handoff must remain exactly 72 bytes")
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ASSERT(ORIGIN(RAM) == __mota_hybrid_handoff_end__,
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"normal RAM must start immediately after the mOTA handoff")
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. = ALIGN(4);
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.svc_data :
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{
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PROVIDE(__start_svc_data = .);
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KEEP(*(.svc_data))
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PROVIDE(__stop_svc_data = .);
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} > RAM
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.fs_data :
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{
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PROVIDE(__start_fs_data = .);
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KEEP(*(.fs_data))
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PROVIDE(__stop_fs_data = .);
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} > RAM
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/* No input section owns this memory. These symbols are the direct-access ABI. */
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.mota_ram (NOLOAD) :
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{
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PROVIDE(__mota_ram_start__ = .);
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. += LENGTH(MOTA_RAM);
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PROVIDE(__mota_ram_end__ = .);
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} > MOTA_RAM
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ASSERT(ORIGIN(MOTA_RAM) == 0x20030000,
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"mOTA RAM arena start must remain fixed")
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ASSERT(LENGTH(MOTA_RAM) == 0x10000,
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"mOTA RAM arena must remain exactly 64 KiB")
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ASSERT(ORIGIN(RAM) + LENGTH(RAM) == ORIGIN(MOTA_RAM),
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"normal RAM must end at the mOTA arena")
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ASSERT(ORIGIN(MOTA_RAM) + LENGTH(MOTA_RAM) == 0x20040000,
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"mOTA RAM arena must end at physical SRAM top")
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}
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INCLUDE "nrf52_common.ld"
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@@ -0,0 +1,80 @@
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/* S140 v7 application layout with a reset-retained 64 KiB mOTA arena. */
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SEARCH_DIR(.)
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GROUP(-lgcc -lc -lnosys)
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MEMORY
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{
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FLASH (rx) : ORIGIN = 0x27000, LENGTH = 0xED000 - 0x27000
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/* 8-byte retained clock state followed by the 72-byte MOTAHYB1 record. */
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PERSISTENT_RAM (rwx) : ORIGIN = 0x20006000, LENGTH = 80
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/* Normal application data, heap, and stack end below the mOTA arena. */
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RAM (rwx) : ORIGIN = 0x20006000 + 80, LENGTH = 0x20030000 - 0x20006000 - 80
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/* Fixed staging arena retained across the software-reset bootloader handoff. */
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MOTA_RAM (rwx) : ORIGIN = 0x20030000, LENGTH = 0x10000
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}
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SECTIONS
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{
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. = ALIGN(4);
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.persistent (NOLOAD) :
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{
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KEEP(*(.persistent_magic))
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KEEP(*(.persistent_data))
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. = ALIGN(4);
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} > PERSISTENT_RAM
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/* Export the direct-access handoff ABI even though no input section owns it. */
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__mota_hybrid_handoff_start__ = ADDR(.persistent) + SIZEOF(.persistent);
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__mota_hybrid_handoff_end__ = ORIGIN(PERSISTENT_RAM) + LENGTH(PERSISTENT_RAM);
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ASSERT(ADDR(.persistent) == 0x20006000,
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"mOTA retained clock prefix start must remain fixed")
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ASSERT(SIZEOF(.persistent) == 8,
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"mOTA hybrid retained clock prefix must remain exactly 8 bytes")
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ASSERT(__mota_hybrid_handoff_start__ == 0x20006008,
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"mOTA hybrid handoff start must remain fixed")
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ASSERT(__mota_hybrid_handoff_end__ == 0x20006050,
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"mOTA hybrid handoff end must remain fixed")
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ASSERT(__mota_hybrid_handoff_end__ - __mota_hybrid_handoff_start__ == 72,
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"mOTA hybrid handoff must remain exactly 72 bytes")
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ASSERT(ORIGIN(RAM) == __mota_hybrid_handoff_end__,
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"normal RAM must start immediately after the mOTA handoff")
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. = ALIGN(4);
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.svc_data :
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{
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PROVIDE(__start_svc_data = .);
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KEEP(*(.svc_data))
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PROVIDE(__stop_svc_data = .);
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} > RAM
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.fs_data :
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{
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PROVIDE(__start_fs_data = .);
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KEEP(*(.fs_data))
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PROVIDE(__stop_fs_data = .);
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} > RAM
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/* No input section owns this memory. These symbols are the direct-access ABI. */
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.mota_ram (NOLOAD) :
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{
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PROVIDE(__mota_ram_start__ = .);
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. += LENGTH(MOTA_RAM);
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PROVIDE(__mota_ram_end__ = .);
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} > MOTA_RAM
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ASSERT(ORIGIN(MOTA_RAM) == 0x20030000,
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"mOTA RAM arena start must remain fixed")
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ASSERT(LENGTH(MOTA_RAM) == 0x10000,
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"mOTA RAM arena must remain exactly 64 KiB")
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ASSERT(ORIGIN(RAM) + LENGTH(RAM) == ORIGIN(MOTA_RAM),
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"normal RAM must end at the mOTA arena")
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ASSERT(ORIGIN(MOTA_RAM) + LENGTH(MOTA_RAM) == 0x20040000,
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"mOTA RAM arena must end at physical SRAM top")
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}
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INCLUDE "nrf52_common.ld"
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