Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * init.c:  Initialize internal variables used by the PROM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *          library functions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  * Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
^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) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <asm/openprom.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <asm/oplib.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) struct linux_romvec *romvec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) EXPORT_SYMBOL(romvec);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) enum prom_major_version prom_vers;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) unsigned int prom_rev, prom_prev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) /* The root node of the prom device tree. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) phandle prom_root_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) EXPORT_SYMBOL(prom_root_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) /* Pointer to the device tree operations structure. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) struct linux_nodeops *prom_nodeops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) /* You must call prom_init() before you attempt to use any of the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)  * routines in the prom library.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)  * It gets passed the pointer to the PROM vector.
^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) void __init prom_init(struct linux_romvec *rp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	romvec = rp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	switch(romvec->pv_romvers) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	case 0:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 		prom_vers = PROM_V0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	case 2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 		prom_vers = PROM_V2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	case 3:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 		prom_vers = PROM_V3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 		prom_printf("PROMLIB: Bad PROM version %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 			    romvec->pv_romvers);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 		prom_halt();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 	prom_rev = romvec->pv_plugin_revision;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 	prom_prev = romvec->pv_printrev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 	prom_nodeops = romvec->pv_nodeops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 	prom_root_node = prom_getsibling(0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 	if ((prom_root_node == 0) || ((s32)prom_root_node == -1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 		prom_halt();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 	if((((unsigned long) prom_nodeops) == 0) || 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 	   (((unsigned long) prom_nodeops) == -1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 		prom_halt();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 	prom_meminit();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) 	prom_ranges_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) 	printk("PROMLIB: Sun Boot Prom Version %d Revision %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) 	       romvec->pv_romvers, prom_rev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) 	/* Initialization successful. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) }