b0259117f2
2. Use time.h for get_time() and move tb_freq into functions.c 3. Move read_io and write_io to io.c and make them static 4. Make a couple of functions static in interrupt.c 5. Refactor a cast from char[] to u64 to get rid of potential alignment problems and a warning Signed-off-by: Myles Watson <mylesgw@gmail.com> Acked-by: Stefan Reinauer <stepan@coresystems.de> git-svn-id: svn://svn.coreboot.org/coreboot/trunk@5191 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
69 lines
1.7 KiB
C
69 lines
1.7 KiB
C
/****************************************************************************
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* YABEL BIOS Emulator
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*
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* This program and the accompanying materials
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* are made available under the terms of the BSD License
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* which accompanies this distribution, and is available at
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* http://www.opensource.org/licenses/bsd-license.php
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*
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* Copyright (c) 2008 Pattrick Hueper <phueper@hueper.net>
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****************************************************************************/
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/* this file contains functions provided by SLOF, that the current biosemu implementation needs
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* they should go away inthe future...
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*/
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#include <types.h>
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#include <string.h>
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#include <device/device.h>
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#include "../debug.h"
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#include "../biosemu.h"
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#include "../compat/time.h"
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#define VMEM_SIZE (1024 * 1024) /* 1 MB */
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#if !defined(CONFIG_YABEL_DIRECTHW) || (!CONFIG_YABEL_DIRECTHW)
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#ifdef CONFIG_YABEL_VIRTMEM_LOCATION
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u8* vmem = (u8 *) CONFIG_YABEL_VIRTMEM_LOCATION;
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#else
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u8* vmem = (u8 *) (16*1024*1024); /* default to 16MB */
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#endif
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#else
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u8* vmem = NULL;
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#endif
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#if CONFIG_BOOTSPLASH
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void vbe_set_graphics(void);
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#endif
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void run_bios(struct device * dev, unsigned long addr)
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{
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biosemu(vmem, VMEM_SIZE, dev, addr);
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#if CONFIG_BOOTSPLASH
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vbe_set_graphics();
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#endif
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if (vmem != NULL) {
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printf("Copying legacy memory from %p to the lower 1MB\n", vmem);
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memcpy((void *)0x00000, vmem + 0x00000, 0x400); // IVT
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memcpy((void *)0x00400, vmem + 0x00400, 0x100); // BDA
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memcpy((void *)0xc0000, vmem + 0xc0000, 0x10000); // VGA OPROM
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}
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}
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unsigned long tb_freq = 0;
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u64 get_time(void)
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{
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u64 act;
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u32 eax, edx;
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__asm__ __volatile__(
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"rdtsc"
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: "=a"(eax), "=d"(edx)
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: /* no inputs, no clobber */);
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act = ((u64) edx << 32) | eax;
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return act;
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}
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