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/* SPDX-License-Identifier: GPL-2.0-only */
#include <acpi/acpi.h>
#include <acpi/acpigen.h>
#include <amdblocks/acpi.h>
#include <amdblocks/chip.h>
#include <assert.h>
#include <cpu/amd/mtrr.h>
#include <device/device.h>
#include <types.h>
unsigned long southbridge_write_acpi_tables(const struct device *device,
unsigned long current,
struct acpi_rsdp *rsdp)
{
return acpi_write_hpet(device, current, rsdp);
}
/* Used by \_SB.PCI0._CRS */
void acpi_fill_root_complex_tom(const struct device *device)
{
const char *scope;
assert(device);
scope = acpi_device_scope(device);
assert(scope);
acpigen_write_scope(scope);
acpigen_write_name_dword("TOM1", get_top_of_mem_below_4gb());
/*
* Since XP only implements parts of ACPI 2.0, we can't use a qword
* here.
* See http://www.acpi.info/presentations/S01USMOBS169_OS%2520new.ppt
* slide 22ff.
* Shift value right by 20 bit to make it fit into 32bit,
* giving us 1MB granularity and a limit of almost 4Exabyte of memory.
*/
acpigen_write_name_dword("TOM2", get_top_of_mem_above_4gb() >> 20);
acpigen_pop_len();
}
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