/* * BIOS run time interface routines. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * Copyright (c) 2008-2009 Silicon Graphics, Inc. All Rights Reserved. * Copyright (c) Russ Anderson <rja@sgi.com> */ #include <linux/efi.h> #include <asm/efi.h> #include <linux/io.h> #include <asm/uv/bios.h> #include <asm/uv/uv_hub.h> static struct uv_systab uv_systab; s64 uv_bios_call(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, u64 a4, u64 a5) { struct uv_systab *tab = &uv_systab; s64 ret; if (!tab->function) /* * BIOS does not support UV systab */ return BIOS_STATUS_UNIMPLEMENTED; ret = efi_call6((void *)__va(tab->function), (u64)which, a1, a2, a3, a4, a5); return ret; } EXPORT_SYMBOL_GPL(uv_bios_call); s64 uv_bios_call_irqsave(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, u64 a4, u64 a5) { unsigned long bios_flags; s64 ret; local_irq_save(bios_flags); ret = uv_bios_call(which, a1, a2, a3, a4, a5); local_irq_restore(bios_flags); return ret; } s64 uv_bios_call_reentrant(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, u64 a4, u64 a5) { s64 ret; preempt_disable(); ret = uv_bios_call(which, a1, a2, a3, a4, a5); preempt_enable(); return ret; } long sn_partition_id; EXPORT_SYMBOL_GPL(sn_partition_id); long sn_coherency_id; EXPORT_SYMBOL_GPL(sn_coherency_id); long sn_region_size; EXPORT_SYMBOL_GPL(sn_region_size); long system_serial_number; EXPORT_SYMBOL_GPL(system_serial_number); int uv_type; EXPORT_SYMBOL_GPL(uv_type); s64 uv_bios_get_sn_info(int fc, int *uvtype, long *partid, long *coher, long *region, long *ssn) { s64 ret; u64 v0, v1; union partition_info_u part; ret = uv_bios_call_irqsave(UV_BIOS_GET_SN_INFO, fc, (u64)(&v0), (u64)(&v1), 0, 0); if (ret != BIOS_STATUS_SUCCESS) return ret; part.val = v0; if (uvtype) *uvtype = part.hub_version; if (partid) *partid = part.partition_id; if (coher) *coher = part.coherence_id; if (region) *region = part.region_size; if (ssn) *ssn = v1; return ret; } EXPORT_SYMBOL_GPL(uv_bios_get_sn_info); int uv_bios_mq_watchlist_alloc(unsigned long addr, unsigned int mq_size, unsigned long *intr_mmr_offset) { u64 watchlist; s64 ret; /* * bios returns watchlist number or negative error number. */ ret = (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_ALLOC, addr, mq_size, (u64)intr_mmr_offset, (u64)&watchlist, 0); if (ret < BIOS_STATUS_SUCCESS) return ret; return watchlist; } EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_alloc); int uv_bios_mq_watchlist_free(int blade, int watchlist_num) { return (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_FREE, blade, watchlist_num, 0, 0, 0); } EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_free); s64 uv_bios_change_memprotect(u64 paddr, u64 len, enum uv_memprotect perms) { return uv_bios_call_irqsave(UV_BIOS_MEMPROTECT, paddr, len, perms, 0, 0); } EXPORT_SYMBOL_GPL(uv_bios_change_memprotect); s64 uv_bios_reserved_page_pa(u64 buf, u64 *cookie, u64 *addr, u64 *len) { s64 ret; ret = uv_bios_call_irqsave(UV_BIOS_GET_PARTITION_ADDR, (u64)cookie, (u64)addr, buf, (u64)len, 0); return ret; } EXPORT_SYMBOL_GPL(uv_bios_reserved_page_pa); s64 uv_bios_freq_base(u64 clock_type, u64 *ticks_per_second) { return uv_bios_call(UV_BIOS_FREQ_BASE, clock_type, (u64)ticks_per_second, 0, 0, 0); } EXPORT_SYMBOL_GPL(uv_bios_freq_base); /* * uv_bios_set_legacy_vga_target - Set Legacy VGA I/O Target * @decode: true to enable target, false to disable target * @domain: PCI domain number * @bus: PCI bus number * * Returns: * 0: Success * -EINVAL: Invalid domain or bus number * -ENOSYS: Capability not available * -EBUSY: Legacy VGA I/O cannot be retargeted at this time */ int uv_bios_set_legacy_vga_target(bool decode, int domain, int bus) { return uv_bios_call(UV_BIOS_SET_LEGACY_VGA_TARGET, (u64)decode, (u64)domain, (u64)bus, 0, 0); } EXPORT_SYMBOL_GPL(uv_bios_set_legacy_vga_target); #ifdef CONFIG_EFI void uv_bios_init(void) { struct uv_systab *tab; if ((efi.uv_systab == EFI_INVALID_TABLE_ADDR) || (efi.uv_systab == (unsigned long)NULL)) { printk(KERN_CRIT "No EFI UV System Table.\n"); uv_systab.function = (unsigned long)NULL; return; } tab = (struct uv_systab *)ioremap(efi.uv_systab, sizeof(struct uv_systab)); if (strncmp(tab->signature, "UVST", 4) != 0) printk(KERN_ERR "bad signature in UV system table!"); /* * Copy table to permanent spot for later use. */ memcpy(&uv_systab, tab, sizeof(struct uv_systab)); iounmap(tab); printk(KERN_INFO "EFI UV System Table Revision %d\n", uv_systab.revision); } #else /* !CONFIG_EFI */ void uv_bios_init(void) { } #endif