1 /* $NetBSD: efibootaa64.c,v 1.6 2022/08/14 11:26:41 jmcneill Exp $ */ 2 3 /*- 4 * Copyright (c) 2016 Kimihiro Nonaka <nonaka@netbsd.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include "../efiboot.h" 30 #include "../efifdt.h" 31 32 #include <sys/bootblock.h> 33 34 #include <loadfile.h> 35 36 /* cache.S */ 37 void aarch64_dcache_wbinv_range(vaddr_t, vsize_t); 38 void aarch64_icache_inv_all(void); 39 void aarch64_exec_kernel(paddr_t, paddr_t); 40 41 void 42 efi_dcache_flush(u_long start, u_long size) 43 { 44 aarch64_dcache_wbinv_range(start, size); 45 } 46 47 void 48 efi_boot_kernel(u_long marks[MARK_MAX]) 49 { 50 u_long kernel_start, kernel_size, kernel_entry; 51 u_long fdt_start, fdt_size; 52 53 kernel_start = marks[MARK_START]; 54 kernel_size = marks[MARK_END] - kernel_start; 55 kernel_entry = marks[MARK_ENTRY]; 56 fdt_start = (u_long)efi_fdt_data(); 57 fdt_size = efi_fdt_size(); 58 59 aarch64_dcache_wbinv_range(kernel_start, kernel_size); 60 if (efi_fdt_size() > 0) { 61 aarch64_dcache_wbinv_range(fdt_start, fdt_size); 62 } 63 aarch64_icache_inv_all(); 64 65 aarch64_exec_kernel((paddr_t)kernel_entry, (paddr_t)fdt_start); 66 } 67 68 /* 69 * Returns the current exception level. 70 */ 71 static u_int 72 efi_aarch64_current_el(void) 73 { 74 uint64_t el; 75 __asm __volatile ("mrs %0, CurrentEL" : "=r" (el)); 76 return (el >> 2) & 0x3; 77 } 78 79 void 80 efi_md_show(void) 81 { 82 command_printtab("CurrentEL", "EL%u\n", efi_aarch64_current_el()); 83 } 84