x86/lib/bios.c

1 // SPDX-License-Identifier: GPL-2.0
6  * Copyright (C) 2009-2010 coresystems GmbH
8 #include <common.h>
9 #include <bios_emul.h>
10 #include <vbe.h>
11 #include <linux/linkage.h>
12 #include <asm/cache.h>
13 #include <asm/processor.h>
14 #include <asm/i8259.h>
15 #include <asm/io.h>
16 #include <asm/post.h>
17 #include "bios.h"
19 /* Interrupt handlers for each interrupt the ROM can call */
52 	/* system model: IBM-AT */  in setup_rombios()
76 	debug("Oops, exception %d while executing option rom\n", regs->vector);  in int_exception_handler()
87 	return -1;  in int_unknown_handler()
102 	 * but the CPU-generated exceptions ("hardware interrupts")  in setup_interrupt_handlers()
175 	/* BIOS Int 14 Handler F000:E739 */  in setup_realmode_idt()
183 	/* ROM BIOS Int 1A Handler F000:FE6E */  in setup_realmode_idt()
195 	      mi->video_mode);  in vbe_get_mode_info()
200 	realmode_interrupt(0x10, VESA_GET_MODE_INFO, 0x0000, mi->video_mode,  in vbe_get_mode_info()
202 	memcpy(mi->mode_info_block, buffer, sizeof(struct vbe_mode_info));  in vbe_get_mode_info()
203 	mi->valid = true;  in vbe_get_mode_info()
210 	int video_mode = mi->video_mode;  in vbe_set_mode()
214 	video_mode |= (1 << 14);  in vbe_set_mode()
227 	mode_info->video_mode = (1 << 14) | vesa_mode;  in vbe_set_graphics()
230 	framebuffer = (unsigned char *)(ulong)mode_info->vesa.phys_base_ptr;  in vbe_set_graphics()
232 	      le16_to_cpu(mode_info->vesa.x_resolution),  in vbe_set_graphics()
233 	      le16_to_cpu(mode_info->vesa.y_resolution),  in vbe_set_graphics()
234 	      mode_info->vesa.bits_per_pixel);  in vbe_set_graphics()
241 	mode_info->video_mode &= 0x3ff;  in vbe_set_graphics()
264 	/* Set up real-mode IDT */  in bios_run_on_x86()
270 	debug("Calling Option ROM at %lx, pci device %#x...", addr, num_dev);  in bios_run_on_x86()
272 	/* Option ROM entry point is at OPROM start + 3 */  in bios_run_on_x86()
278 	if (vesa_mode != -1)  in bios_run_on_x86()