Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /* -*- linux-c -*- ------------------------------------------------------- *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *   Copyright (C) 1991, 1992 Linus Torvalds
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  *   Copyright 2007-2008 rPath, Inc. - All Rights Reserved
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  * ----------------------------------------------------------------------- */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)  * arch/x86/boot/cpu.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)  * Check for obligatory CPU features and abort if the features are not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)  * present.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include "boot.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #ifdef CONFIG_X86_FEATURE_NAMES
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include "cpustr.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) static char *cpu_name(int level)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	static char buf[6];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	if (level == 64) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 		return "x86-64";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 		if (level == 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 			level = 6;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 		sprintf(buf, "i%d86", level);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 		return buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) static void show_cap_strs(u32 *err_flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	int i, j;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #ifdef CONFIG_X86_FEATURE_NAMES
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	const unsigned char *msg_strs = (const unsigned char *)x86_cap_strs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	for (i = 0; i < NCAPINTS; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 		u32 e = err_flags[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 		for (j = 0; j < 32; j++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 			if (msg_strs[0] < i ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 			    (msg_strs[0] == i && msg_strs[1] < j)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 				/* Skip to the next string */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 				msg_strs += 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 				while (*msg_strs++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 					;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 			if (e & 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 				if (msg_strs[0] == i &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 				    msg_strs[1] == j &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 				    msg_strs[2])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 					printf("%s ", msg_strs+2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 				else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 					printf("%d:%d ", i, j);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 			e >>= 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 	for (i = 0; i < NCAPINTS; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 		u32 e = err_flags[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 		for (j = 0; j < 32; j++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 			if (e & 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 				printf("%d:%d ", i, j);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 			e >>= 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) int validate_cpu(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) 	u32 *err_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) 	int cpu_level, req_level;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) 	check_cpu(&cpu_level, &req_level, &err_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) 	if (cpu_level < req_level) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) 		printf("This kernel requires an %s CPU, ",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) 		       cpu_name(req_level));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) 		printf("but only detected an %s CPU.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) 		       cpu_name(cpu_level));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) 	if (err_flags) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) 		puts("This kernel requires the following features "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) 		     "not present on the CPU:\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) 		show_cap_strs(err_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) 		putchar('\n');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) 	} else if (check_knl_erratum()) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) }