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Support for udelay in baremetal

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This commit is contained in:
Steven James 2003-04-10 20:51:31 +00:00
parent 88d4672564
commit 5bcc3e0242
5 changed files with 40 additions and 4 deletions
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2
util/baremetal/bootselect/Makefile
View file

@ -3,7 +3,7 @@ ARCH = i386
CC = gcc
CFLAGS = -I ../include -I ../include/$(ARCH) -O2
CFLAGS = -I ../include -I ../include/$(ARCH) -O2 -DZKERNEL_START=0xfff00000
DEPS = bootselect.o rom_fill_inbuf.o chooser.o ../lib/baremetal.a

2
util/baremetal/bootselect/chooser.c
View file

@ -50,7 +50,7 @@ int choose_stream(struct stream *stream)
current += current->block_count+1;
}
j=2;
j=1;
if(iskey()) {
j = ttys0_rx_char();
j=-1;

33
util/baremetal/include/cpu/p6/msr.h Normal file
View file

@ -0,0 +1,33 @@
#ifndef CPU_P6_MSR_H
#define CPU_P6_MSR_H
/*
* Access to machine-specific registers (available on 586 and better only)
* Note: the rd* operations modify the parameters directly (without using
* pointer indirection), this allows gcc to optimize better
*/
#define rdmsr(msr,val1,val2) \
__asm__ __volatile__("rdmsr" \
: "=a" (val1), "=d" (val2) \
: "c" (msr))
#define wrmsr(msr,val1,val2) \
__asm__ __volatile__("wrmsr" \
: /* no outputs */ \
: "c" (msr), "a" (val1), "d" (val2))
#define rdtsc(low,high) \
__asm__ __volatile__("rdtsc" : "=a" (low), "=d" (high))
#define rdtscl(low) \
__asm__ __volatile__ ("rdtsc" : "=a" (low) : : "edx")
#define rdtscll(val) \
__asm__ __volatile__ ("rdtsc" : "=A" (val))
#define rdpmc(counter,low,high) \
__asm__ __volatile__("rdpmc" \
: "=a" (low), "=d" (high) \
: "c" (counter))
#endif /* CPU_P6_MSR_H */

2
util/baremetal/include/string.h
View file

@ -6,7 +6,7 @@
// yes, linux has fancy ones. We don't care. This stuff gets used
// hardly at all. And the pain of including those files is just too high.
//extern inline void strcpy(char *dst, char *src) {while (*src) *dst++ = *src++;}
extern inline void strcpy(char *dst, char *src) {while (*src) *dst++ = *src++;}
//extern inline int strlen(char *src) { int i = 0; while (*src++) i++; return i;}

5
util/baremetal/lib/Makefile
View file

@ -6,7 +6,7 @@ CFLAGS = -I ../include -I ../include/$(ARCH) -O2
LB_SOURCE=../../../src
DEPS = printk.o serial_subr.o subr.o vsprintf.o memcpy.o malloc.o memset.o compute_ip_checksum.o elfboot.o boot.o ide.o linuxbios.o
DEPS = printk.o serial_subr.o subr.o vsprintf.o memcpy.o malloc.o memset.o compute_ip_checksum.o elfboot.o boot.o ide.o linuxbios.o delay_tsc.o
baremetal.a : $(DEPS)
ar -cr baremetal.a $(DEPS)
@ -32,5 +32,8 @@ malloc.o: $(LB_SOURCE)/lib/malloc.c
printk.o: $(LB_SOURCE)/lib/printk.c
$(CC) $(CFLAGS) -c $<
delay_tsc.o: $(LB_SOURCE)/cpu/p5/delay_tsc.c
$(CC) $(CFLAGS) -c $<
clean:
rm -f $(DEPS) baremetal.a