1*d729b554SArd Biesheuvel // SPDX-License-Identifier: GPL-2.0 2*d729b554SArd Biesheuvel /* 3*d729b554SArd Biesheuvel * Author: Yun Liu <liuyun@loongson.cn> 4*d729b554SArd Biesheuvel * Huacai Chen <chenhuacai@loongson.cn> 5*d729b554SArd Biesheuvel * Copyright (C) 2020-2022 Loongson Technology Corporation Limited 6*d729b554SArd Biesheuvel */ 7*d729b554SArd Biesheuvel 8*d729b554SArd Biesheuvel #include <asm/efi.h> 9*d729b554SArd Biesheuvel #include <asm/addrspace.h> 10*d729b554SArd Biesheuvel #include "efistub.h" 11*d729b554SArd Biesheuvel 12*d729b554SArd Biesheuvel typedef void __noreturn (*kernel_entry_t)(bool efi, unsigned long cmdline, 13*d729b554SArd Biesheuvel unsigned long systab); 14*d729b554SArd Biesheuvel 15*d729b554SArd Biesheuvel efi_status_t check_platform_features(void) 16*d729b554SArd Biesheuvel { 17*d729b554SArd Biesheuvel return EFI_SUCCESS; 18*d729b554SArd Biesheuvel } 19*d729b554SArd Biesheuvel 20*d729b554SArd Biesheuvel struct exit_boot_struct { 21*d729b554SArd Biesheuvel efi_memory_desc_t *runtime_map; 22*d729b554SArd Biesheuvel int runtime_entry_count; 23*d729b554SArd Biesheuvel }; 24*d729b554SArd Biesheuvel 25*d729b554SArd Biesheuvel static efi_status_t exit_boot_func(struct efi_boot_memmap *map, void *priv) 26*d729b554SArd Biesheuvel { 27*d729b554SArd Biesheuvel struct exit_boot_struct *p = priv; 28*d729b554SArd Biesheuvel 29*d729b554SArd Biesheuvel /* 30*d729b554SArd Biesheuvel * Update the memory map with virtual addresses. The function will also 31*d729b554SArd Biesheuvel * populate @runtime_map with copies of just the EFI_MEMORY_RUNTIME 32*d729b554SArd Biesheuvel * entries so that we can pass it straight to SetVirtualAddressMap() 33*d729b554SArd Biesheuvel */ 34*d729b554SArd Biesheuvel efi_get_virtmap(map->map, map->map_size, map->desc_size, 35*d729b554SArd Biesheuvel p->runtime_map, &p->runtime_entry_count); 36*d729b554SArd Biesheuvel 37*d729b554SArd Biesheuvel return EFI_SUCCESS; 38*d729b554SArd Biesheuvel } 39*d729b554SArd Biesheuvel 40*d729b554SArd Biesheuvel unsigned long __weak kernel_entry_address(void) 41*d729b554SArd Biesheuvel { 42*d729b554SArd Biesheuvel return *(unsigned long *)(PHYSADDR(VMLINUX_LOAD_ADDRESS) + 8); 43*d729b554SArd Biesheuvel } 44*d729b554SArd Biesheuvel 45*d729b554SArd Biesheuvel efi_status_t efi_boot_kernel(void *handle, efi_loaded_image_t *image, 46*d729b554SArd Biesheuvel unsigned long kernel_addr, char *cmdline_ptr) 47*d729b554SArd Biesheuvel { 48*d729b554SArd Biesheuvel kernel_entry_t real_kernel_entry; 49*d729b554SArd Biesheuvel struct exit_boot_struct priv; 50*d729b554SArd Biesheuvel unsigned long desc_size; 51*d729b554SArd Biesheuvel efi_status_t status; 52*d729b554SArd Biesheuvel u32 desc_ver; 53*d729b554SArd Biesheuvel 54*d729b554SArd Biesheuvel status = efi_alloc_virtmap(&priv.runtime_map, &desc_size, &desc_ver); 55*d729b554SArd Biesheuvel if (status != EFI_SUCCESS) { 56*d729b554SArd Biesheuvel efi_err("Unable to retrieve UEFI memory map.\n"); 57*d729b554SArd Biesheuvel return status; 58*d729b554SArd Biesheuvel } 59*d729b554SArd Biesheuvel 60*d729b554SArd Biesheuvel efi_info("Exiting boot services\n"); 61*d729b554SArd Biesheuvel 62*d729b554SArd Biesheuvel efi_novamap = false; 63*d729b554SArd Biesheuvel status = efi_exit_boot_services(handle, &priv, exit_boot_func); 64*d729b554SArd Biesheuvel if (status != EFI_SUCCESS) 65*d729b554SArd Biesheuvel return status; 66*d729b554SArd Biesheuvel 67*d729b554SArd Biesheuvel /* Install the new virtual address map */ 68*d729b554SArd Biesheuvel efi_rt_call(set_virtual_address_map, 69*d729b554SArd Biesheuvel priv.runtime_entry_count * desc_size, desc_size, 70*d729b554SArd Biesheuvel desc_ver, priv.runtime_map); 71*d729b554SArd Biesheuvel 72*d729b554SArd Biesheuvel /* Config Direct Mapping */ 73*d729b554SArd Biesheuvel csr_write64(CSR_DMW0_INIT, LOONGARCH_CSR_DMWIN0); 74*d729b554SArd Biesheuvel csr_write64(CSR_DMW1_INIT, LOONGARCH_CSR_DMWIN1); 75*d729b554SArd Biesheuvel 76*d729b554SArd Biesheuvel real_kernel_entry = (void *)kernel_entry_address(); 77*d729b554SArd Biesheuvel 78*d729b554SArd Biesheuvel real_kernel_entry(true, (unsigned long)cmdline_ptr, 79*d729b554SArd Biesheuvel (unsigned long)efi_system_table); 80*d729b554SArd Biesheuvel } 81