Home | History | Annotate | Line # | Download | only in bootaa64
efibootaa64.c revision 1.6 
      1 /*	$NetBSD: efibootaa64.c,v 1.6 2022/08/14 11:26:41 jmcneill Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2016 Kimihiro Nonaka <nonaka (at) 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