memlayout.h

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/* SPDX-License-Identifier: GPL-2.0-only */
 
/* This file contains macro definitions for memlayout.ld linker scripts. */
 
#ifndef __ARCH_MEMLAYOUT_H
#define __ARCH_MEMLAYOUT_H
 
#define SUPERPAGE_SIZE ((1 + CONFIG(ARM_LPAE)) * 1M)
 
#define TTB(addr, size) \
        REGION(ttb, addr, size, 16K) \
        _ = ASSERT(size >= 16K + CONFIG(ARM_LPAE) * 32, \
                "TTB must be 16K (+ 32 for LPAE)!");
 
#define TTB_SUBTABLES(addr, size) \
        REGION(ttb_subtables, addr, size, CONFIG(ARM_LPAE)*3K + 1K) \
        _ = ASSERT(size % (1K + 3K * CONFIG(ARM_LPAE)) == 0, \
                "TTB subtable region must be evenly divisible by table size!");
 
/* ARM stacks need 8-byte alignment and stay in one place through ramstage. */
#define STACK(addr, size) \
        REGION(stack, addr, size, 8) \
        _ = ASSERT(size >= 2K, "stack should be >= 2K, see toolchain.inc");
 
#define DMA_COHERENT(addr, size) \
        REGION(dma_coherent, addr, size, SUPERPAGE_SIZE) \
        _ = ASSERT(size % SUPERPAGE_SIZE == 0, \
                "DMA coherency buffer must fit exactly in full superpages!");
 
#define FRAMEBUFFER(addr, size) \
        REGION(framebuffer, addr, size, SUPERPAGE_SIZE) \
        _ = ASSERT(size % SUPERPAGE_SIZE == 0, \
                "Framebuffer must fit exactly in full superpages!");
 
#endif /* __ARCH_MEMLAYOUT_H */