// SPDX-License-Identifier: GPL-2.0
#include <linux/bug.h>
#include <linux/export.h>
#include <linux/types.h>
#include <linux/mmdebug.h>
#include <linux/mm.h>

#include <asm/addrspace.h>
#include <asm/sections.h>
#include <asm/io.h>
#include <asm/page.h>
#include <asm/dma.h>

static inline bool __debug_virt_addr_valid(unsigned long x)
{
        /*
         * MAX_DMA_ADDRESS is a virtual address that may not correspond to an
         * actual physical address. Enough code relies on
         * virt_to_phys(MAX_DMA_ADDRESS) that we just need to work around it
         * and always return true.
         */
        if (x == MAX_DMA_ADDRESS)
                return true;

        return x >= PAGE_OFFSET && (KSEGX(x) < KSEG2 ||
               IS_ENABLED(CONFIG_EVA) ||
               !IS_ENABLED(CONFIG_HIGHMEM));
}

phys_addr_t __virt_to_phys(volatile const void *x)
{
        WARN(!__debug_virt_addr_valid((unsigned long)x),
             "virt_to_phys used for non-linear address: %p (%pS)\n",
             x, x);

        return __virt_to_phys_nodebug(x);
}
EXPORT_SYMBOL(__virt_to_phys);

phys_addr_t __phys_addr_symbol(unsigned long x)
{
        /* This is bounds checking against the kernel image only.
         * __pa_symbol should only be used on kernel symbol addresses.
         */
        VIRTUAL_BUG_ON(x < (unsigned long)_text ||
                       x > (unsigned long)_end);

        return __pa_symbol_nodebug(x);
}
EXPORT_SYMBOL(__phys_addr_symbol);