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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2022 Google LLC
*/
#ifndef _PVMFW_GENRATE_FDT_H
#define _PVMFW_GENRATE_FDT_H
#include <linux/types.h>
/**
* As pvmfw is responsible for providing the next stage with a DT it can trust
* while some degree of flexibility should be allowed to the VMM (and its
* clients in host userspace) w.r.t. the specification of the platform, we
*
* - parse the input DT into a boot_config
* - transfer a template DT from .rodata to where the next stage expects it
* - update the template DT using the boot_config
*
* This allows the VMM (host) to configure the following parameters:
*
* - number of CPUs
* - size of RAM (but fixed base address)
* - size of reserved DMA memory region
* - available standard IBM PC 16550 UART serial ports
*/
struct boot_config {
size_t cpu_count;
uint64_t memsize;
uint64_t pci_hi_addr;
uint64_t pci_hi_size;
uint64_t pci_lo_addr;
uint64_t pci_lo_size;
size_t pci_irq_count;
size_t serials_count;
uint64_t serials[4];
uint64_t kaslr_seed;
uint64_t swiotlb_size;
uint64_t swiotlb_align;
uint64_t bcc_addr;
uint64_t bcc_size;
bool new_instance;
};
int parse_input_fdt(const void *fdt, struct boot_config *cfg);
int transfer_fdt_template(void *fdt, size_t max_size);
int patch_output_fdt(void *fdt, const struct boot_config *cfg);
#endif
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