mirror of
https://github.com/fail0verflow/switch-coreboot.git
synced 2025-05-04 01:39:18 -04:00
a94ea6f062
Subject: [PATCH] use the rom_addr passed by coreboot, needed for ROM images from LAR Signed-off-by: Pattrick Hueper <phueper@hueper.net> Acked-by: Myles Watson <mylesgw@gmail.com> git-svn-id: svn://coreboot.org/repository/coreboot-v3@1081 f3766cd6-281f-0410-b1cd-43a5c92072e9
84 lines
1.9 KiB
C
84 lines
1.9 KiB
C
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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 <device/device.h>
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#include <config.h>
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#define VMEM_SIZE 1024 *1024 /* 1 MB */
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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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u32 biosemu(u8 *biosmem, u32 biosmem_size, struct device *dev,
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unsigned long rom_addr);
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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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}
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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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unsigned int
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read_io(void *addr, size_t sz)
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{
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unsigned int ret;
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/* since we are using inb instructions, we need the port number as 16bit value */
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u16 port = (u16)(u32) addr;
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switch (sz) {
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case 1:
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asm volatile ("inb %1, %b0" : "=a"(ret) : "d" (port));
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break;
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case 2:
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asm volatile ("inw %1, %w0" : "=a"(ret) : "d" (port));
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break;
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case 4:
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asm volatile ("inl %1, %0" : "=a"(ret) : "d" (port));
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break;
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default:
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ret = 0;
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}
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return ret;
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}
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int
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write_io(void *addr, unsigned int value, size_t sz)
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{
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u16 port = (u16)(u32) addr;
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switch (sz) {
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/* since we are using inb instructions, we need the port number as 16bit value */
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case 1:
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asm volatile ("outb %b0, %1" : : "a"(value), "d" (port));
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break;
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case 2:
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asm volatile ("outw %w0, %1" : : "a"(value), "d" (port));
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break;
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case 4:
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asm volatile ("outl %0, %1" : : "a"(value), "d" (port));
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break;
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default:
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return -1;
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}
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return 0;
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}
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