diff options
Diffstat (limited to 'arch/i386/boot/main.c')
| -rw-r--r-- | arch/i386/boot/main.c | 161 |
1 files changed, 0 insertions, 161 deletions
diff --git a/arch/i386/boot/main.c b/arch/i386/boot/main.c deleted file mode 100644 index 0eeef39..0000000 --- a/arch/i386/boot/main.c +++ /dev/null @@ -1,161 +0,0 @@ -/* -*- linux-c -*- ------------------------------------------------------- * - * - * Copyright (C) 1991, 1992 Linus Torvalds - * Copyright 2007 rPath, Inc. - All Rights Reserved - * - * This file is part of the Linux kernel, and is made available under - * the terms of the GNU General Public License version 2. - * - * ----------------------------------------------------------------------- */ - -/* - * arch/i386/boot/main.c - * - * Main module for the real-mode kernel code - */ - -#include "boot.h" - -struct boot_params boot_params __attribute__((aligned(16))); - -char *HEAP = _end; -char *heap_end = _end; /* Default end of heap = no heap */ - -/* - * Copy the header into the boot parameter block. Since this - * screws up the old-style command line protocol, adjust by - * filling in the new-style command line pointer instead. - */ -#define OLD_CL_MAGIC 0xA33F -#define OLD_CL_ADDRESS 0x20 - -static void copy_boot_params(void) -{ - struct old_cmdline { - u16 cl_magic; - u16 cl_offset; - }; - const struct old_cmdline * const oldcmd = - (const struct old_cmdline *)OLD_CL_ADDRESS; - - BUILD_BUG_ON(sizeof boot_params != 4096); - memcpy(&boot_params.hdr, &hdr, sizeof hdr); - - if (!boot_params.hdr.cmd_line_ptr && - oldcmd->cl_magic == OLD_CL_MAGIC) { - /* Old-style command line protocol. */ - u16 cmdline_seg; - - /* Figure out if the command line falls in the region - of memory that an old kernel would have copied up - to 0x90000... */ - if (oldcmd->cl_offset < boot_params.hdr.setup_move_size) - cmdline_seg = ds(); - else - cmdline_seg = 0x9000; - - boot_params.hdr.cmd_line_ptr = - (cmdline_seg << 4) + oldcmd->cl_offset; - } -} - -/* - * Set the keyboard repeat rate to maximum. Unclear why this - * is done here; this might be possible to kill off as stale code. - */ -static void keyboard_set_repeat(void) -{ - u16 ax = 0x0305; - u16 bx = 0; - asm volatile("int $0x16" - : "+a" (ax), "+b" (bx) - : : "ecx", "edx", "esi", "edi"); -} - -/* - * Get Intel SpeedStep (IST) information. - */ -static void query_ist(void) -{ - asm("int $0x15" - : "=a" (boot_params.ist_info.signature), - "=b" (boot_params.ist_info.command), - "=c" (boot_params.ist_info.event), - "=d" (boot_params.ist_info.perf_level) - : "a" (0x0000e980), /* IST Support */ - "d" (0x47534943)); /* Request value */ -} - -/* - * Tell the BIOS what CPU mode we intend to run in. - */ -static void set_bios_mode(void) -{ -#ifdef CONFIG_X86_64 - u32 eax, ebx; - - eax = 0xec00; - ebx = 2; - asm volatile("int $0x15" - : "+a" (eax), "+b" (ebx) - : : "ecx", "edx", "esi", "edi"); -#endif -} - -void main(void) -{ - /* First, copy the boot header into the "zeropage" */ - copy_boot_params(); - - /* End of heap check */ - if (boot_params.hdr.loadflags & CAN_USE_HEAP) { - heap_end = (char *)(boot_params.hdr.heap_end_ptr - +0x200-STACK_SIZE); - } else { - /* Boot protocol 2.00 only, no heap available */ - puts("WARNING: Ancient bootloader, some functionality " - "may be limited!\n"); - } - - /* Make sure we have all the proper CPU support */ - if (validate_cpu()) { - puts("Unable to boot - please use a kernel appropriate " - "for your CPU.\n"); - die(); - } - - /* Tell the BIOS what CPU mode we intend to run in. */ - set_bios_mode(); - - /* Detect memory layout */ - detect_memory(); - - /* Set keyboard repeat rate (why?) */ - keyboard_set_repeat(); - - /* Set the video mode */ - set_video(); - - /* Query MCA information */ - query_mca(); - - /* Voyager */ -#ifdef CONFIG_X86_VOYAGER - query_voyager(); -#endif - - /* Query Intel SpeedStep (IST) information */ - query_ist(); - - /* Query APM information */ -#if defined(CONFIG_APM) || defined(CONFIG_APM_MODULE) - query_apm_bios(); -#endif - - /* Query EDD information */ -#if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE) - query_edd(); -#endif - /* Do the last things and invoke protected mode */ - go_to_protected_mode(); -} |
