diff options
Diffstat (limited to 'qemu/roms/openbios/utils/devbios/bios_core.c')
| -rw-r--r-- | qemu/roms/openbios/utils/devbios/bios_core.c | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/qemu/roms/openbios/utils/devbios/bios_core.c b/qemu/roms/openbios/utils/devbios/bios_core.c new file mode 100644 index 000000000..d165cdb3e --- /dev/null +++ b/qemu/roms/openbios/utils/devbios/bios_core.c @@ -0,0 +1,198 @@ +/* + * OpenBIOS - free your system! + * ( firmware/flash device driver for Linux ) + * + * bios_core.c - core skeleton + * + * This program is part of a free implementation of the IEEE 1275-1994 + * Standard for Boot (Initialization Configuration) Firmware. + * + * Copyright (C) 1998-2004 Stefan Reinauer, <stepan@openbios.org> + * + * 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; version 2 of the License. + * + * 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., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA + * + */ + +#include <linux/config.h> +#include <linux/version.h> +#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0) +#ifdef MODULE +#ifdef MODVERSIONS +#include <linux/modversions.h> +#endif +#endif +#include <linux/module.h> +#endif +#include <linux/pci.h> +#include <linux/errno.h> +#include <linux/vmalloc.h> +#include <linux/init.h> + +#include <asm/io.h> + +#include "bios.h" +#include "pcisets.h" +#include "flashchips.h" +#include "programming.h" + +extern struct file_operations bios_fops; +int bios_proc_register(void); +int bios_proc_unregister(void); + +int write = 0; + +spinlock_t bios_lock = SPIN_LOCK_UNLOCKED; + +/* + * ****************************************** + * + * Cleanup + * + * ****************************************** + */ + +static void free_iomaps(void) +{ + unsigned long lastmapped=0; + unsigned int i; + + /* We remember the last mapped area to be sure that we only iounmap + * every mapped area once. If two flash devices are in the same + * area but do not occur sequentially during probing you have a + * seriously strange hardware + */ + for (i=0; i<flashcount; i++) { + if (lastmapped==flashdevices[i].mapped) + continue; + iounmap((void *)flashdevices[i].mapped); + lastmapped=flashdevices[i].mapped; + } +} + +/* + * ****************************************** + * + * Initialization + * + * ****************************************** + */ + +void probe_system(void) +{ +#ifdef __alpha__ + probe_alphafw(); +#endif + /* This function checks all flash media attached to + * PCI devices in the system. This means NON-PCI systems + * don't work. This causes machine checks on my LX164 test + * machine, so leave it away until it's fixed. This is + * needed for Ruffians, so we check the machine type + * in probe_alphafw() and call probe_pcibus from there. + * This could use some cleanup + */ +#ifndef __alpha__ + probe_pcibus(); +#endif +} + +static __init int bios_init(void) +{ + printk(KERN_INFO "BIOS driver v" BIOS_VERSION " (writing %s) for " + UTS_RELEASE "\n", write?"enabled":"disabled"); + +#if !defined(UTC_BIOS) && LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0) + if (!pci_present()) { + printk(KERN_WARNING "BIOS: No PCI system."); + return -EBUSY; + } +#endif + + /* Probe for flash devices */ + probe_system(); + + if (flashcount==0) { + printk(KERN_WARNING "BIOS: No flash devices found.\n"); + return -EBUSY; + } + + if (register_chrdev(BIOS_MAJOR, "bios", &bios_fops) == -EBUSY) { + printk(KERN_WARNING "BIOS: Could not register bios device.\n"); + free_iomaps(); + return -EBUSY; + } + +#ifdef CONFIG_PROC_FS + bios_proc_register(); +#endif + return 0; +} + +/* + * ****************************************** + * + * module handling + * + * ****************************************** + */ + +#ifdef MODULE +MODULE_PARM(write,"i"); +MODULE_AUTHOR("Stefan Reinauer <stepan@openbios.org>"); +#if LINUX_VERSION_CODE > KERNEL_VERSION(2,4,10) +MODULE_LICENSE("GPL"); +#endif + +static __exit void cleanup_bios_module (void) +{ +#ifdef CONFIG_PROC_FS + bios_proc_unregister(); +#endif + free_iomaps(); + + unregister_chrdev(BIOS_MAJOR, "bios"); + printk(KERN_INFO "BIOS driver removed.\n"); +} + +#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0) +int init_module(void) +{ + return bios_init(); +} + +void cleanup_module(void) +{ + cleanup_bios_module(); +} +#endif + +#if LINUX_VERSION_CODE > KERNEL_VERSION(2,5,74) +module_init(bios_init); +module_exit(cleanup_bios_module); +#endif + +void inc_mod(void) +{ +#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0) + MOD_INC_USE_COUNT; +#endif +} + +void dec_mod(void) +{ +#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0) + MOD_DEC_USE_COUNT; +#endif +} + +#endif |