mirror of
https://review.coreboot.org/flashrom.git
synced 2025-04-27 07:02:34 +02:00
Move utility functions into new source files
Corresponding to flashrom svn r6 and coreboot v2 svn r1428.
This commit is contained in:
Ollie Lho
parent
3770a1132e
commit
cbbf125981
7
Makefile
7
Makefile
@ -1,5 +1,5 @@
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OBJS = jedec.o sst28sf040.o am29f040b.o mx29f002.c sst39sf020.o m29f400bt.o \
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w49f002u.o 82802ab.o msys_doc.o pm49fl004.o sst49lf040.o
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OBJS = flash_enable.o udelay.o jedec.o sst28sf040.o am29f040b.o mx29f002.c sst39sf020.o \
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m29f400bt.o w49f002u.o 82802ab.o msys_doc.o pm49fl004.o sst49lf040.o
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CC = gcc -O2 -g -Wall -Werror
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all: flash_rom flash_on
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@ -28,5 +28,6 @@ sst39sf020.o: sst39sf020.c sst39sf020.h jedec.h flash.h
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sst49lf040.o: sst49lf040.c sst49lf040.h jedec.h flash.h
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w49f002u.o: w49f002u.c w49f002u.h jedec.h flash.h
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pm49fl004.o: pm49fl004.c pm49fl004.h jedec.h flash.h
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flash_enable.o: flash_enable.c
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udelay.o: udelay.c
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jedec.o: jedec.c jedec.h flash.h
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3
flash.h
3
flash.h
@ -55,5 +55,6 @@ struct flashchip {
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#define MSYSTEMS_MD2802 0x30 /* hmm -- both 0x30 */
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extern void myusec_delay(int time);
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extern void myusec_calibrate_delay();
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extern int enable_flash_write(void);
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#endif /* !__FLASH_H__ */
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278
flash_enable.c
Normal file
278
flash_enable.c
Normal file
@ -0,0 +1,278 @@
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#include <sys/io.h>
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#include <stdio.h>
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#include <pci/pci.h>
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#include <stdlib.h>
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static int enable_flash_sis630 (struct pci_dev *dev, char *name)
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{
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char b;
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/* get io privilege access PCI configuration space */
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if (iopl(3) != 0) {
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perror("Can not set io priviliage");
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exit(1);
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}
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/* Enable 0xFFF8000~0xFFFF0000 decoding on SiS 540/630 */
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outl(0x80000840, 0x0cf8);
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b = inb(0x0cfc) | 0x0b;
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outb(b, 0xcfc);
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/* Flash write enable on SiS 540/630 */
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outl(0x80000845, 0x0cf8);
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b = inb(0x0cfd) | 0x40;
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outb(b, 0xcfd);
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/* The same thing on SiS 950 SuperIO side */
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outb(0x87, 0x2e);
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outb(0x01, 0x2e);
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outb(0x55, 0x2e);
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outb(0x55, 0x2e);
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if (inb(0x2f) != 0x87) {
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outb(0x87, 0x4e);
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outb(0x01, 0x4e);
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outb(0x55, 0x4e);
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outb(0xaa, 0x4e);
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if (inb(0x4f) != 0x87) {
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printf("Can not access SiS 950\n");
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return -1;
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}
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outb(0x24, 0x4e);
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b = inb(0x4f) | 0xfc;
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outb(0x24, 0x4e);
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outb(b, 0x4f);
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outb(0x02, 0x4e);
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outb(0x02, 0x4f);
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}
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outb(0x24, 0x2e);
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printf("2f is %#x\n", inb(0x2f));
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b = inb(0x2f) | 0xfc;
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outb(0x24, 0x2e);
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outb(b, 0x2f);
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outb(0x02, 0x2e);
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outb(0x02, 0x2f);
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return 0;
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}
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static int enable_flash_e7500(struct pci_dev *dev, char *name)
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{
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/* register 4e.b gets or'ed with one */
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unsigned char old, new;
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/* if it fails, it fails. There are so many variations of broken mobos
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* that it is hard to argue that we should quit at this point.
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*/
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old = pci_read_byte(dev, 0x4e);
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new = old | 1;
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if (new == old)
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return 0;
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pci_write_byte(dev, 0x4e, new);
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if (pci_read_byte(dev, 0x4e) != new) {
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printf("tried to set 0x%x to 0x%x on %s failed (WARNING ONLY)\n",
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0x4e, new, name);
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return -1;
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}
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return 0;
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}
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static int enable_flash_vt8235(struct pci_dev *dev, char *name)
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{
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unsigned char old, new, val;
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unsigned int base;
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int ok;
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/* get io privilege access PCI configuration space */
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if (iopl(3) != 0) {
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perror("Can not set io priviliage");
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exit(1);
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}
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old = pci_read_byte(dev, 0x40);
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new = old | 0x10;
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if (new == old)
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return 0;
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ok = pci_write_byte(dev, 0x40, new);
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if (ok != 0) {
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printf("tried to set 0x%x to 0x%x on %s failed (WARNING ONLY)\n",
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old, new, name);
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}
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/* enable GPIO15 which is connected to write protect. */
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base = ((pci_read_byte(dev, 0x88) & 0x80) | pci_read_byte(dev, 0x89) << 8);
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val = inb(base + 0x4d);
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val |= 0x80;
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outb(val, base + 0x4d);
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if (ok != 0) {
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return -1;
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} else {
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return 0;
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}
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}
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static int enable_flash_vt8231(struct pci_dev *dev, char *name)
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{
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unsigned char val;
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val = pci_read_byte(dev, 0x40);
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val |= 0x10;
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pci_write_byte(dev, 0x40, val);
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if (pci_read_byte(dev, 0x40) != val) {
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printf("tried to set 0x%x to 0x%x on %s failed (WARNING ONLY)\n",
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0x40, val, name);
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return -1;
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}
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return 0;
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}
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static int enable_flash_cs5530(struct pci_dev *dev, char *name)
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{
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unsigned char new;
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pci_write_byte(dev, 0x52, 0xee);
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new = pci_read_byte(dev, 0x52);
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if (new != 0xee) {
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printf("tried to set register 0x%x to 0x%x on %s failed (WARNING ONLY)\n",
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0x52, new, name);
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return -1;
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}
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return 0;
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}
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static int enable_flash_sc1100(struct pci_dev *dev, char *name)
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{
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unsigned char new;
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pci_write_byte(dev, 0x52, 0xee);
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new = pci_read_byte(dev, 0x52);
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if (new != 0xee) {
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printf("tried to set register 0x%x to 0x%x on %s failed (WARNING ONLY)\n",
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0x52, new, name);
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return -1;
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}
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return 0;
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}
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static int enable_flash_sis5595(struct pci_dev *dev, char *name)
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{
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unsigned char new, newer;
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new = pci_read_byte(dev, 0x45);
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/* clear bit 5 */
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new &= (~ 0x20);
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/* set bit 2 */
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new |= 0x4;
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pci_write_byte(dev, 0x45, new);
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newer = pci_read_byte(dev, 0x45);
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if (newer != new) {
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printf("tried to set register 0x%x to 0x%x on %s failed (WARNING ONLY)\n",
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0x45, new, name);
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printf("Stuck at 0x%x\n", newer);
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return -1;
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}
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return 0;
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}
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static int enable_flash_amd8111(struct pci_dev *dev, char *name) {
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/* register 4e.b gets or'ed with one */
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unsigned char old, new;
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/* if it fails, it fails. There are so many variations of broken mobos
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* that it is hard to argue that we should quit at this point.
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*/
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//dump_pci_device(dev);
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old = pci_read_byte(dev, 0x43);
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new = old | 0x80;
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if (new != old) {
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pci_write_byte(dev, 0x43, new);
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if (pci_read_byte(dev, 0x43) != new) {
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printf("tried to set 0x%x to 0x%x on %s failed (WARNING ONLY)\n",
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0x43, new, name);
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}
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}
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old = pci_read_byte(dev, 0x40);
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new = old | 0x01;
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if (new == old)
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return 0;
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pci_write_byte(dev, 0x40, new);
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if (pci_read_byte(dev, 0x40) != new) {
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printf("tried to set 0x%x to 0x%x on %s failed (WARNING ONLY)\n",
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0x40, new, name);
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return -1;
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}
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return 0;
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}
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typedef struct penable {
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unsigned short vendor, device;
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char *name;
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int (*doit)(struct pci_dev *dev, char *name);
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} FLASH_ENABLE;
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static FLASH_ENABLE enables[] = {
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{0x1039, 0x0630, "sis630", enable_flash_sis630},
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{0x8086, 0x2480, "E7500", enable_flash_e7500},
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{0x1106, 0x8231, "VT8231", enable_flash_vt8231},
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{0x1106, 0x3177, "VT8235", enable_flash_vt8235},
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{0x1078, 0x0100, "CS5530", enable_flash_cs5530},
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{0x100b, 0x0510, "SC1100", enable_flash_sc1100},
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{0x1039, 0x0008, "SIS5595", enable_flash_sis5595},
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{0x1022, 0x7468, "AMD8111", enable_flash_amd8111},
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};
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int enable_flash_write()
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{
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int i;
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struct pci_access *pacc;
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struct pci_dev *dev = 0;
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FLASH_ENABLE *enable = 0;
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pacc = pci_alloc(); /* Get the pci_access structure */
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/* Set all options you want -- here we stick with the defaults */
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pci_init(pacc); /* Initialize the PCI library */
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pci_scan_bus(pacc); /* We want to get the list of devices */
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/* now let's try to find the chipset we have ... */
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for (i = 0; i < sizeof(enables)/sizeof(enables[0]) && (! dev); i++) {
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struct pci_filter f;
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struct pci_dev *z;
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/* the first param is unused. */
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pci_filter_init((struct pci_access *) 0, &f);
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f.vendor = enables[i].vendor;
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f.device = enables[i].device;
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for (z=pacc->devices; z; z=z->next)
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if (pci_filter_match(&f, z)) {
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enable = &enables[i];
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dev = z;
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}
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}
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/* now do the deed. */
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if (enable) {
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printf("Enabling flash write on %s...", enable->name);
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if (enable->doit(dev, enable->name) == 0)
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printf("OK\n");
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}
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return 0;
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}
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365
flash_rom.c
365
flash_rom.c
@ -29,11 +29,8 @@
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#include <errno.h>
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#include <fcntl.h>
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#include <sys/mman.h>
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#include <sys/io.h>
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#include <sys/time.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <pci/pci.h>
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#include <string.h>
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#include <stdlib.h>
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@ -51,7 +48,6 @@
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#include "mx29f002.h"
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struct flashchip flashchips[] = {
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#if 1
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{"Am29F040B", AMD_ID, AM_29F040B, NULL, 512, 64*1024,
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probe_29f040b, erase_29f040b, write_29f040b, NULL},
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{"At29C040A", ATMEL_ID, AT_29C040A, NULL, 512, 256,
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@ -68,13 +64,10 @@ struct flashchip flashchips[] = {
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probe_39sf020, erase_39sf020, write_39sf020, NULL},
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{"SST49LF040", SST_ID, SST_49LF040, NULL, 512, 4096,
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probe_49lf040, erase_49lf040, write_49lf040, NULL},
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#endif
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//By LYH begin
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{"Pm49FL004", PMC_ID, PMC_49FL004, NULL, 512, 64*1024,
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probe_49fl004, erase_49fl004, write_49fl004, NULL},
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//END
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#if 1
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{"W29C011", WINBOND_ID, W_29C011, NULL, 128, 128,
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probe_jedec, erase_jedec, write_jedec, NULL},
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{"W29C020C", WINBOND_ID, W_29C020C, NULL, 256, 128,
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@ -92,263 +85,9 @@ struct flashchip flashchips[] = {
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NULL, 8, 8*1024,
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probe_md2802, erase_md2802, write_md2802, read_md2802},
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{NULL,}
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#endif
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};
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char *chip_to_probe = NULL;
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#if 1
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int enable_flash_sis630 (struct pci_dev *dev, char *name)
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{
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char b;
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/* get io privilege access PCI configuration space */
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if (iopl(3) != 0) {
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perror("Can not set io priviliage");
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exit(1);
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}
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/* Enable 0xFFF8000~0xFFFF0000 decoding on SiS 540/630 */
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outl(0x80000840, 0x0cf8);
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b = inb(0x0cfc) | 0x0b;
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outb(b, 0xcfc);
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/* Flash write enable on SiS 540/630 */
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outl(0x80000845, 0x0cf8);
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b = inb(0x0cfd) | 0x40;
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outb(b, 0xcfd);
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/* The same thing on SiS 950 SuperIO side */
|
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outb(0x87, 0x2e);
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outb(0x01, 0x2e);
|
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outb(0x55, 0x2e);
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outb(0x55, 0x2e);
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if (inb(0x2f) != 0x87) {
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outb(0x87, 0x4e);
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outb(0x01, 0x4e);
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outb(0x55, 0x4e);
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outb(0xaa, 0x4e);
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if (inb(0x4f) != 0x87) {
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printf("Can not access SiS 950\n");
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return -1;
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}
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outb(0x24, 0x4e);
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b = inb(0x4f) | 0xfc;
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outb(0x24, 0x4e);
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outb(b, 0x4f);
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outb(0x02, 0x4e);
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outb(0x02, 0x4f);
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}
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outb(0x24, 0x2e);
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printf("2f is %#x\n", inb(0x2f));
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b = inb(0x2f) | 0xfc;
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outb(0x24, 0x2e);
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outb(b, 0x2f);
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outb(0x02, 0x2e);
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outb(0x02, 0x2f);
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return 0;
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}
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int
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enable_flash_e7500(struct pci_dev *dev, char *name) {
|
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/* register 4e.b gets or'ed with one */
|
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unsigned char old, new;
|
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/* if it fails, it fails. There are so many variations of broken mobos
|
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* that it is hard to argue that we should quit at this point.
|
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*/
|
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old = pci_read_byte(dev, 0x4e);
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new = old | 1;
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if (new == old)
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return 0;
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pci_write_byte(dev, 0x4e, new);
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if (pci_read_byte(dev, 0x4e) != new) {
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printf("tried to set 0x%x to 0x%x on %s failed (WARNING ONLY)\n",
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0x4e, new, name);
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return -1;
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}
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return 0;
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}
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int
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enable_flash_vt8235(struct pci_dev *dev, char *name) {
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unsigned char old, new, val;
|
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unsigned int base;
|
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int ok;
|
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|
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/* get io privilege access PCI configuration space */
|
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if (iopl(3) != 0) {
|
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perror("Can not set io priviliage");
|
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exit(1);
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}
|
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|
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old = pci_read_byte(dev, 0x40);
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new = old | 0x10;
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if (new == old)
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return 0;
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ok = pci_write_byte(dev, 0x40, new);
|
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if (ok != 0) {
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printf("tried to set 0x%x to 0x%x on %s failed (WARNING ONLY)\n",
|
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old, new, name);
|
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}
|
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/* enable GPIO15 which is connected to write protect. */
|
||||
base = ((pci_read_byte(dev, 0x88) & 0x80) | pci_read_byte(dev, 0x89) << 8);
|
||||
val = inb(base + 0x4d);
|
||||
val |= 0x80;
|
||||
outb(val, base + 0x4d);
|
||||
|
||||
if (ok != 0) {
|
||||
return -1;
|
||||
} else {
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
int
|
||||
enable_flash_vt8231(struct pci_dev *dev, char *name) {
|
||||
unsigned char val;
|
||||
|
||||
val = pci_read_byte(dev, 0x40);
|
||||
val |= 0x10;
|
||||
pci_write_byte(dev, 0x40, val);
|
||||
|
||||
if (pci_read_byte(dev, 0x40) != val) {
|
||||
printf("tried to set 0x%x to 0x%x on %s failed (WARNING ONLY)\n",
|
||||
0x40, val, name);
|
||||
return -1;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
int
|
||||
enable_flash_cs5530(struct pci_dev *dev, char *name) {
|
||||
unsigned char new;
|
||||
|
||||
pci_write_byte(dev, 0x52, 0xee);
|
||||
|
||||
new = pci_read_byte(dev, 0x52);
|
||||
|
||||
if (new != 0xee) {
|
||||
printf("tried to set register 0x%x to 0x%x on %s failed (WARNING ONLY)\n",
|
||||
0x52, new, name);
|
||||
return -1;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
int
|
||||
enable_flash_sc1100(struct pci_dev *dev, char *name) {
|
||||
unsigned char new;
|
||||
|
||||
pci_write_byte(dev, 0x52, 0xee);
|
||||
|
||||
new = pci_read_byte(dev, 0x52);
|
||||
|
||||
if (new != 0xee) {
|
||||
printf("tried to set register 0x%x to 0x%x on %s failed (WARNING ONLY)\n",
|
||||
0x52, new, name);
|
||||
return -1;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
int
|
||||
enable_flash_sis5595(struct pci_dev *dev, char *name) {
|
||||
unsigned char new, newer;
|
||||
|
||||
new = pci_read_byte(dev, 0x45);
|
||||
|
||||
/* clear bit 5 */
|
||||
new &= (~ 0x20);
|
||||
/* set bit 2 */
|
||||
new |= 0x4;
|
||||
|
||||
pci_write_byte(dev, 0x45, new);
|
||||
|
||||
newer = pci_read_byte(dev, 0x45);
|
||||
if (newer != new) {
|
||||
printf("tried to set register 0x%x to 0x%x on %s failed (WARNING ONLY)\n",
|
||||
0x45, new, name);
|
||||
printf("Stuck at 0x%x\n", newer);
|
||||
return -1;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
//BY LYH
|
||||
#if 0
|
||||
static void dump_pci_device(struct pci_dev *dev)
|
||||
{
|
||||
int i;
|
||||
|
||||
printf("\n");
|
||||
for(i = 0; i <= 255; i++) {
|
||||
unsigned char val;
|
||||
if ((i & 0x0f) == 0) {
|
||||
printf("0x%02x:",i);
|
||||
}
|
||||
val = pci_read_byte(dev, i);
|
||||
printf(" 0x%02x",val);
|
||||
if ((i & 0x0f) == 0x0f) {
|
||||
printf("\r\n");
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
int
|
||||
enable_flash_amd8111(struct pci_dev *dev, char *name) {
|
||||
/* register 4e.b gets or'ed with one */
|
||||
unsigned char old, new;
|
||||
/* if it fails, it fails. There are so many variations of broken mobos
|
||||
* that it is hard to argue that we should quit at this point.
|
||||
*/
|
||||
|
||||
// dump_pci_device(dev);
|
||||
|
||||
old = pci_read_byte(dev, 0x43);
|
||||
|
||||
new = old | 0x80;
|
||||
|
||||
if (new != old) {
|
||||
|
||||
pci_write_byte(dev, 0x43, new);
|
||||
|
||||
if (pci_read_byte(dev, 0x43) != new) {
|
||||
printf("tried to set 0x%x to 0x%x on %s failed (WARNING ONLY)\n",
|
||||
0x43, new, name);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
old = pci_read_byte(dev, 0x40);
|
||||
|
||||
new = old | 0x01;
|
||||
|
||||
if (new == old)
|
||||
return 0;
|
||||
|
||||
pci_write_byte(dev, 0x40, new);
|
||||
|
||||
if (pci_read_byte(dev, 0x40) != new) {
|
||||
printf("tried to set 0x%x to 0x%x on %s failed (WARNING ONLY)\n",
|
||||
0x40, new, name);
|
||||
return -1;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
//By LYH END
|
||||
|
||||
struct flashchip * probe_flash(struct flashchip * flash)
|
||||
{
|
||||
@ -370,8 +109,7 @@ struct flashchip * probe_flash(struct flashchip * flash)
|
||||
size = flash->total_size * 1024;
|
||||
/* BUG? what happens if getpagesize() > size!?
|
||||
-> ``Error MMAP /dev/mem: Invalid argument'' NIKI */
|
||||
if(getpagesize() > size)
|
||||
{
|
||||
if (getpagesize() > size) {
|
||||
size = getpagesize();
|
||||
printf("%s: warning: size: %d -> %ld\n", __FUNCTION__,
|
||||
flash->total_size * 1024, (unsigned long)size);
|
||||
@ -421,104 +159,6 @@ int verify_flash (struct flashchip * flash, char * buf, int verbose)
|
||||
return 1;
|
||||
}
|
||||
|
||||
// count to a billion. Time it. If it's < 1 sec, count to 10B, etc.
|
||||
|
||||
unsigned long micro = 1;
|
||||
|
||||
void
|
||||
myusec_calibrate_delay()
|
||||
{
|
||||
int count = 1000;
|
||||
unsigned long timeusec;
|
||||
struct timeval start, end;
|
||||
int ok = 0;
|
||||
void myusec_delay(int time);
|
||||
|
||||
printf("Setting up microsecond timing loop\n");
|
||||
while (! ok) {
|
||||
//fprintf(stderr, "Try %d\n", count);
|
||||
gettimeofday(&start, 0);
|
||||
myusec_delay(count);
|
||||
gettimeofday(&end, 0);
|
||||
timeusec = 1000000 * (end.tv_sec - start.tv_sec ) +
|
||||
(end.tv_usec - start.tv_usec);
|
||||
//fprintf(stderr, "timeusec is %d\n", timeusec);
|
||||
count *= 2;
|
||||
if (timeusec < 1000000/4)
|
||||
continue;
|
||||
ok = 1;
|
||||
}
|
||||
|
||||
// compute one microsecond. That will be count / time
|
||||
micro = count / timeusec;
|
||||
|
||||
fprintf(stderr, "%ldM loops per second\n", (unsigned long)micro);
|
||||
|
||||
|
||||
}
|
||||
|
||||
void
|
||||
myusec_delay(int time)
|
||||
{
|
||||
volatile unsigned long i;
|
||||
for(i = 0; i < time * micro; i++)
|
||||
;
|
||||
}
|
||||
|
||||
typedef struct penable {
|
||||
unsigned short vendor, device;
|
||||
char *name;
|
||||
int (*doit)(struct pci_dev *dev, char *name);
|
||||
} FLASH_ENABLE;
|
||||
|
||||
FLASH_ENABLE enables[] = {
|
||||
#if 1
|
||||
{0x1, 0x1, "sis630 -- what's the ID?", enable_flash_sis630},
|
||||
{0x8086, 0x2480, "E7500", enable_flash_e7500},
|
||||
{0x1106, 0x8231, "VT8231", enable_flash_vt8231},
|
||||
{0x1106, 0x3177, "VT8235", enable_flash_vt8235},
|
||||
{0x1078, 0x0100, "CS5530", enable_flash_cs5530},
|
||||
{0x100b, 0x0510, "SC1100", enable_flash_sc1100},
|
||||
{0x1039, 0x8, "SIS5595", enable_flash_sis5595},
|
||||
#endif
|
||||
{0x1022, 0x7468, "AMD8111", enable_flash_amd8111},
|
||||
};
|
||||
|
||||
int
|
||||
enable_flash_write() {
|
||||
int i;
|
||||
struct pci_access *pacc;
|
||||
struct pci_dev *dev = 0;
|
||||
FLASH_ENABLE *enable = 0;
|
||||
|
||||
pacc = pci_alloc(); /* Get the pci_access structure */
|
||||
/* Set all options you want -- here we stick with the defaults */
|
||||
pci_init(pacc); /* Initialize the PCI library */
|
||||
pci_scan_bus(pacc); /* We want to get the list of devices */
|
||||
|
||||
/* now let's try to find the chipset we have ... */
|
||||
for(i = 0; i < sizeof(enables)/sizeof(enables[0]) && (! dev); i++) {
|
||||
struct pci_filter f;
|
||||
struct pci_dev *z;
|
||||
/* the first param is unused. */
|
||||
pci_filter_init((struct pci_access *) 0, &f);
|
||||
f.vendor = enables[i].vendor;
|
||||
f.device = enables[i].device;
|
||||
for(z=pacc->devices; z; z=z->next)
|
||||
if (pci_filter_match(&f, z)) {
|
||||
enable = &enables[i];
|
||||
dev = z;
|
||||
}
|
||||
}
|
||||
|
||||
/* now do the deed. */
|
||||
if (enable) {
|
||||
printf("Enabling flash write on %s...", enable->name);
|
||||
if (enable->doit(dev, enable->name) == 0)
|
||||
printf("OK\n");
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
void usage(const char *name)
|
||||
{
|
||||
@ -532,8 +172,7 @@ void usage(const char *name)
|
||||
exit(1);
|
||||
}
|
||||
|
||||
int
|
||||
main (int argc, char * argv[])
|
||||
int main (int argc, char * argv[])
|
||||
{
|
||||
char * buf;
|
||||
unsigned long size;
|
||||
|
||||
43
udelay.c
Normal file
43
udelay.c
Normal file
@ -0,0 +1,43 @@
|
||||
#include <sys/time.h>
|
||||
#include <stdio.h>
|
||||
|
||||
// count to a billion. Time it. If it's < 1 sec, count to 10B, etc.
|
||||
unsigned long micro = 1;
|
||||
|
||||
void myusec_delay(int time)
|
||||
{
|
||||
volatile unsigned long i;
|
||||
for(i = 0; i < time * micro; i++)
|
||||
;
|
||||
}
|
||||
|
||||
void myusec_calibrate_delay()
|
||||
{
|
||||
int count = 1000;
|
||||
unsigned long timeusec;
|
||||
struct timeval start, end;
|
||||
int ok = 0;
|
||||
void myusec_delay(int time);
|
||||
|
||||
printf("Setting up microsecond timing loop\n");
|
||||
while (!ok) {
|
||||
//fprintf(stderr, "Try %d\n", count);
|
||||
gettimeofday(&start, 0);
|
||||
myusec_delay(count);
|
||||
gettimeofday(&end, 0);
|
||||
timeusec = 1000000 * (end.tv_sec - start.tv_sec ) +
|
||||
(end.tv_usec - start.tv_usec);
|
||||
//fprintf(stderr, "timeusec is %d\n", timeusec);
|
||||
count *= 2;
|
||||
if (timeusec < 1000000/4)
|
||||
continue;
|
||||
ok = 1;
|
||||
}
|
||||
|
||||
// compute one microsecond. That will be count / time
|
||||
micro = count / timeusec;
|
||||
|
||||
fprintf(stderr, "%ldM loops per second\n", (unsigned long)micro);
|
||||
|
||||
|
||||
}
|
||||
Loading…
x
Reference in New Issue
Block a user