diff options
Diffstat (limited to 'arch/sparc/prom/init_32.c')
-rw-r--r-- | arch/sparc/prom/init_32.c | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/arch/sparc/prom/init_32.c b/arch/sparc/prom/init_32.c new file mode 100644 index 0000000000..d20470166c --- /dev/null +++ b/arch/sparc/prom/init_32.c @@ -0,0 +1,76 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * init.c: Initialize internal variables used by the PROM + * library functions. + * + * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) + * Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) + */ + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/module.h> + +#include <asm/openprom.h> +#include <asm/oplib.h> + +struct linux_romvec *romvec; +EXPORT_SYMBOL(romvec); + +enum prom_major_version prom_vers; +unsigned int prom_rev, prom_prev; + +/* The root node of the prom device tree. */ +phandle prom_root_node; +EXPORT_SYMBOL(prom_root_node); + +/* Pointer to the device tree operations structure. */ +struct linux_nodeops *prom_nodeops; + +/* You must call prom_init() before you attempt to use any of the + * routines in the prom library. + * It gets passed the pointer to the PROM vector. + */ + +void __init prom_init(struct linux_romvec *rp) +{ + romvec = rp; + + switch(romvec->pv_romvers) { + case 0: + prom_vers = PROM_V0; + break; + case 2: + prom_vers = PROM_V2; + break; + case 3: + prom_vers = PROM_V3; + break; + default: + prom_printf("PROMLIB: Bad PROM version %d\n", + romvec->pv_romvers); + prom_halt(); + break; + } + + prom_rev = romvec->pv_plugin_revision; + prom_prev = romvec->pv_printrev; + prom_nodeops = romvec->pv_nodeops; + + prom_root_node = prom_getsibling(0); + if ((prom_root_node == 0) || ((s32)prom_root_node == -1)) + prom_halt(); + + if((((unsigned long) prom_nodeops) == 0) || + (((unsigned long) prom_nodeops) == -1)) + prom_halt(); + + prom_meminit(); + + prom_ranges_init(); + + printk("PROMLIB: Sun Boot Prom Version %d Revision %d\n", + romvec->pv_romvers, prom_rev); + + /* Initialization successful. */ +} |