// SPDX-License-Identifier: GPL-2.0

#include <linux/types.h>
#include <linux/mmdebug.h>
#include <linux/mm.h>
#include <asm/page.h>
#include <asm/sections.h>

phys_addr_t __virt_to_phys(unsigned long x)
{
        /*
         * Boundary checking aginst the kernel linear mapping space.
         */
        WARN(!is_linear_mapping(x) && !is_kernel_mapping(x),
             "virt_to_phys used for non-linear address: %p (%pS)\n",
             (void *)x, (void *)x);

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

phys_addr_t __phys_addr_symbol(unsigned long x)
{
        unsigned long kernel_start = kernel_map.virt_addr;
        unsigned long kernel_end = kernel_start + kernel_map.size;

        /*
         * Boundary checking aginst the kernel image mapping.
         * __pa_symbol should only be used on kernel symbol addresses.
         */
        VIRTUAL_BUG_ON(x < kernel_start || x > kernel_end);

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

phys_addr_t linear_mapping_va_to_pa(unsigned long x)
{
        BUG_ON(!kernel_map.va_pa_offset);

        return ((unsigned long)(x) - kernel_map.va_pa_offset);
}
EXPORT_SYMBOL(linear_mapping_va_to_pa);

void *linear_mapping_pa_to_va(unsigned long x)
{
        BUG_ON(!kernel_map.va_pa_offset);

        return ((void *)((unsigned long)(x) + kernel_map.va_pa_offset));
}
EXPORT_SYMBOL(linear_mapping_pa_to_va);