amd_mtrr.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <amdblocks/biosram.h>
#include <console/console.h>
#include <device/device.h>
#include <cpu/amd/mtrr.h>
 
void add_uma_resource_below_tolm(struct device *nb, int idx)
{
        uint32_t topmem = amd_topmem();
        uint32_t top_of_cacheable = restore_top_of_low_cacheable();
 
        if (top_of_cacheable == topmem)
                return;
 
        uint32_t uma_base = top_of_cacheable;
        uint32_t uma_size = topmem - top_of_cacheable;
 
        printk(BIOS_INFO, "%s: uma size 0x%08x, memory start 0x%08x\n",
                        __func__, uma_size, uma_base);
 
        uma_resource(nb, idx, uma_base / KiB, uma_size / KiB);
}