bl31.scat

#! armclang -E -x c

/*
 * Copyright (c) 2019, ARM Limited and Contributors. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#include <platform_def.h>

#define PAGE_SIZE	(1024 * 4)

LR_START BL31_BASE
{
	__BL31_START__ +0 FIXED EMPTY 0
	{
		/* placeholder */
	}

	/* BL31_BASE address must be aligned on a page boundary. */
	ScatterAssert((ImageBase(__BL31_START__) AND 0xFFF) == 0)
}

LR_TEXT BL31_BASE
{
	__TEXT__ +0 FIXED
	{
		*(:gdef:bl31_entrypoint, +FIRST)
		*(.text*)
		*(.vectors)
		.ANY1(+RO-CODE)
	}

	__TEXT_EPILOGUE__ AlignExpr(+0, PAGE_SIZE) FIXED EMPTY 0
	{
		/* section delimiter */
	}
}

LR_RO_DATA +0
{
	__RODATA__ AlignExpr(ImageLimit(LR_TEXT), 0) FIXED
	{
		*(.rodata*)
		.ANY2(+RO-DATA)
	}

	/* Ensure 8-byte alignment for descriptors and ensure inclusion */
	__RT_SVC_DESCS__ AlignExpr(ImageLimit(__RODATA__), 8) FIXED
	{
		*(rt_svc_descs)
	}

#if ENABLE_PMF
	/* Ensure 8-byte alignment for descriptors and ensure inclusion */
	__PMF_SVC_DESCS__ AlignExpr(ImageLimit(__RT_SVC_DESCS__), 8) FIXED
	{
		*(pmf_svc_descs)
	}
#endif /* ENABLE_PMF */

	/*
	 * Ensure 8-byte alignment for cpu_ops so that its fields are also
	 * aligned.
	 */
	__CPU_OPS__ AlignExpr(+0, 8) FIXED
	{
		*(cpu_ops)
	}

	/*
	 * Keep the .got section in the RO section as it is patched
	 * prior to enabling the MMU and having the .got in RO is better for
	 * security. GOT is a table of addresses so ensure 8-byte alignment.
	 */
	__GOT__ AlignExpr(ImageLimit(__CPU_OPS__), 8) FIXED
	{
		*(.got)
	}

	/* Place pubsub sections for events */
	__PUBSUB_EVENTS__ AlignExpr(+0, 8) EMPTY 0
	{
		/* placeholder */
	}

#include <lib/el3_runtime/pubsub_events.h>

	__RODATA_EPILOGUE__ AlignExpr(+0, PAGE_SIZE) FIXED EMPTY 0
	{
		/* section delimiter */
	}
}

	/* cpu_ops must always be defined */
	ScatterAssert(ImageLength(__CPU_OPS__) > 0)

#if ENABLE_SPM || SPM_MM
LR_SPM +0
{
	/*
	 * Exception vectors of the SPM shim layer. They must be aligned to a 2K
	 * address, but we need to place them in a separate page so that we can set
	 * individual permissions to them, so the actual alignment needed is 4K.
	 *
	 * There's no need to include this into the RO section of BL31 because it
	 * doesn't need to be accessed by BL31.
	 */
	__SPM_SHIM_EXCEPTIONS__ AlignExpr(ImageLimit(LR_RO_DATA), PAGE_SIZE) FIXED
	{
		*(.spm_shim_exceptions)
	}

	__SPM_SHIM_EXCEPTIONS_EPILOGUE__ AlignExpr(ImageLimit(__SPM_SHIM_EXCEPTIONS__), PAGE_SIZE) FIXED
	{
		/* placeholder */
	}
}
#endif

LR_RW_DATA +0
{
	__DATA__ AlignExpr(+0, 16) FIXED
	{
		*(.data*)
		*(.constdata)
		*(locale$$data)
	}
}

LR_RELA +0
{
	/*
	 * .rela.dyn needs to come after .data for the read-elf utility to parse
	 * this section correctly. Ensure 8-byte alignment so that the fields of
	 * RELA data structure are aligned.
	 */
	__RELA__ AlignExpr(ImageLimit(LR_RW_DATA), 8) FIXED
	{
		*(.rela.dyn)
	}
}

#ifdef BL31_PROGBITS_LIMIT
	/* BL31 progbits has exceeded its limit. */
	ScatterAssert(ImageLimit(LR_RELA) <= BL31_PROGBITS_LIMIT)
#endif

LR_STACKS +0
{
	__STACKS__ AlignExpr(+0, 64) FIXED
	{
		*(tzfw_normal_stacks)
	}
}

#define __BAKERY_LOCK_SIZE__		(ImageLimit(__BAKERY_LOCKS_EPILOGUE__) - \
					 ImageBase(__BAKERY_LOCKS__))
#define BAKERY_LOCK_SIZE		(__BAKERY_LOCK_SIZE__ * (PLATFORM_CORE_COUNT - 1))
#define __PMF_TIMESTAMP_SIZE__		(ImageLimit(__PMF_TIMESTAMP__) - \
					 ImageBase(__PMF_TIMESTAMP__))
#define PER_CPU_TIMESTAMP_SIZE		(__PMF_TIMESTAMP_SIZE__ * (PLATFORM_CORE_COUNT - 1))

LR_BSS +0
{
	__BSS__ AlignExpr(ImageLimit(LR_STACKS), 256) FIXED
	{
		*(.bss*)
		*(COMDAT)
	}

#if !USE_COHERENT_MEM
	/*
	 * Bakery locks are stored in normal .bss memory
	 *
	 * Each lock's data is spread across multiple cache lines, one per CPU,
	 * but multiple locks can share the same cache line.
	 * The compiler will allocate enough memory for one CPU's bakery locks,
	 * the remaining cache lines are allocated by the linker script
	 */
	__BAKERY_LOCKS__ AlignExpr(ImageLimit(__BSS__), CACHE_WRITEBACK_GRANULE) FIXED
	{
		*(bakery_lock)
	}

	__BAKERY_LOCKS_EPILOGUE__ AlignExpr(ImageLimit(__BAKERY_LOCKS__), CACHE_WRITEBACK_GRANULE) FIXED EMPTY 0
	{
		/* section delimiter */
	}

	__PER_CPU_BAKERY_LOCKS__ ImageLimit(__BAKERY_LOCKS_EPILOGUE__) FIXED FILL 0 BAKERY_LOCK_SIZE
	{
		/* padded memory section to store per cpu bakery locks */
	}

#ifdef PLAT_PERCPU_BAKERY_LOCK_SIZE
	/* PLAT_PERCPU_BAKERY_LOCK_SIZE does not match bakery lock requirements */
	ScatterAssert(__PER_CPU_BAKERY_LOCK_SIZE__ == PLAT_PERCPU_BAKERY_LOCK_SIZE)
#endif
#endif

#if ENABLE_PMF
	/*
	 * Time-stamps are stored in normal .bss memory
	 *
	 * The compiler will allocate enough memory for one CPU's time-stamps,
	 * the remaining memory for other CPU's is allocated by the
	 * linker script
	 */
	__PMF_TIMESTAMP__ AlignExpr(+0, CACHE_WRITEBACK_GRANULE) FIXED EMPTY CACHE_WRITEBACK_GRANULE
	{
		/* store timestamps in this carved out memory */
	}

	__PMF_TIMESTAMP_EPILOGUE__ AlignExpr(ImageLimit(__PMF_TIMESTAMP__), CACHE_WRITEBACK_GRANULE) FIXED EMPTY 0
	{
		/*
		 * placeholder to make __PMF_TIMESTAMP_START__ end on a
		 * CACHE_WRITEBACK_GRANULE boundary
		 */
	}

	__PER_CPU_TIMESTAMPS__ +0 FIXED FILL 0 PER_CPU_TIMESTAMP_SIZE
	{
		/* padded memory section to store per cpu timestamps */
	}
#endif /* ENABLE_PMF */
}

LR_XLAT_TABLE +0
{
	xlat_table +0 FIXED
	{
		*(xlat_table)
	}
}

#if USE_COHERENT_MEM
LR_COHERENT_RAM +0
{
	/*
	 * The base address of the coherent memory section must be page-aligned (4K)
	 * to guarantee that the coherent data are stored on their own pages and
	 * are not mixed with normal data.  This is required to set up the correct
	 * memory attributes for the coherent data page tables.
	 */
	__COHERENT_RAM__ AlignExpr(+0, PAGE_SIZE) FIXED
	{
		/*
		 * Bakery locks are stored in coherent memory
		 *
		 * Each lock's data is contiguous and fully allocated by the compiler
		 */
		*(bakery_lock)
		*(tzfw_coherent_mem)
	}

	__COHERENT_RAM_EPILOGUE_UNALIGNED__ +0 FIXED EMPTY 0
	{
		/* section delimiter */
	}

	/*
	 * Memory page(s) mapped to this section will be marked
	 * as device memory.  No other unexpected data must creep in.
	 * Ensure the rest of the current memory page is unused.
	 */
	__COHERENT_RAM_EPILOGUE__ AlignExpr(ImageLimit(__COHERENT_RAM_START__), PAGE_SIZE) FIXED EMPTY 0
	{
		/* section delimiter */
	}
}
#endif

LR_END +0
{
	__BL31_END__ +0 FIXED EMPTY 0
	{
		/* placeholder */
	}

	/* BL31 image has exceeded its limit. */
	ScatterAssert(ImageLimit(__BL31_END__) <= BL31_LIMIT)
}